JP2017217455A - Sanitary product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sanitary product which can reduce a liquid return amount, and which is excellent in whiteness of a surface even after it is used.SOLUTION: A sanitary product 10 of the invention comprises: a surface sheet 20 which is positioned on a skin contact surface side; a rear surface sheet 30 which is positioned on a non-skin contact surface side; and an absorber 40 arranged therebetween. On the absorber 40 or the side closer to the skin contact surface side than the absorber 40, a hemagglutination agent containing area which contains a hemagglutination agent, and a liquid film cleavage agent containing area which contains a liquid film cleavage agent, are arranged. For example, the liquid film cleavage agent containing area may be provided on the surface sheet 20, and the hemagglutination agent containing area may be provided on a core wrap sheet 42 forming the absorber 40.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a sanitary product used to absorb menstrual blood.

  Sanitary products are used to treat women's menstrual blood and vaginal discharge. A sanitary product is usually provided with an absorbent body capable of absorbing and retaining excretion such as menstrual blood between a top sheet positioned on the skin contact surface side and a back sheet positioned on the non-skin contact surface side. It is configured.

  A technique for improving various performances by applying a cationic polymer material to such a sanitary product is known. For example, Patent Document 1 describes a personal care absorbent article such as a napkin or tampon that includes a porous nonwoven web material treated with a treatment agent that clumps or dissolves red blood cells in blood. . In this document, a polycation material which is a strongly positively charged polymer is used as the treatment agent. This treatment agent aggregates or dissolves red blood cells in the blood when the blood enters or passes through the absorbent article.

  Patent Document 2 discloses that the top sheet contains a blood modifying agent in order to improve the touch of the top sheet after absorbing menstrual blood. This blood modifying agent lowers the viscosity and surface tension of blood, stabilizes blood cells, makes it difficult to form a cash structure, and makes it easier for the absorber to absorb menstrual blood.

Special table 2002-528232 gazette JP2013-063245A

  It is known that the moisture absorption rate and amount absorbed by the superabsorbent polymer differ depending on the type of moisture. For example, when comparing the case where a superabsorbent polymer absorbs physiological saline and blood, blood absorbs slower and absorbs less than physiological saline. Therefore, in order to improve the performance of sanitary products, it is important to improve various absorption performances of the superabsorbent polymer for blood. Patent Documents 1 and 2 disclose blood modifying agents, which are insufficient to enhance the absorption performance of the superabsorbent polymer and reduce the liquid return amount of sanitary products. It was.

  In addition, the surface sheet located on the skin contact surface side of the sanitary product is normally white when not in use, but the sanitary product user sees the sanitary product removed after use from the surface sheet side, and the surface is white. This gives you a sense of security with regard to absorption performance. Therefore, it is required to make the surface whiteness after use more excellent. Patent Document 1 and Patent Document 2 have no description regarding surface whiteness, and no idea has been made as to which place in the sanitary product the modified blood should be retained from this point of view.

  As a result of various studies for the purpose of improving the absorption capacity of menstrual blood in sanitary products, the present inventors have found that the red blood cells contained in menstrual blood may cover the surface of the superabsorbent polymer. It has been found that the absorption performance (absorption rate, absorption amount) for blood is lowered, and that the return amount of sanitary products is increased. In order to prevent this inconvenience, a water-soluble cationic polymer capable of agglutinating red blood cells is placed in a sanitary product at a site that can contact the menstrual blood excreted by the user prior to the superabsorbent polymer. It was found that this is effective in reducing the liquid return amount of sanitary products. However, it has been found that there is room for improvement in the appearance from the surface sheet side after use when red blood cell aggregates are formed on the surface sheet side of the sanitary product by the water-soluble cationic polymer.

  In addition, as a result of various studies for the purpose of improving the surface whiteness of sanitary products after use, the present inventors have found that menstrual blood remains in a non-woven fabric such as a surface sheet by forming a liquid film between the fibers. Has been found to be a cause of a decrease in surface whiteness after use. In order to prevent this inconvenience, it is necessary to arrange a liquid film cleaving agent capable of cleaving the liquid film on the surface sheet or the like for menstrual blood excreted by the user. We obtained knowledge that it is effective in improving The disappearance of the liquid film in the top sheet has the effect of reducing the liquid return amount, but it has been found that there is room for improvement toward further reduction.

  Therefore, the present invention relates to providing a sanitary product that reduces liquid return and has excellent surface whiteness even after use.

The present invention is a sanitary product having a surface sheet located on the skin contact surface side, a back sheet located on the non-skin contact surface side, and an absorbent body sandwiched between them,
On the skin contact surface side from the absorber or the absorber,
A hemagglutinating agent-containing region containing a hemagglutinating agent;
The present invention provides a sanitary product having a liquid film cleaving agent-containing region containing a liquid film cleaving agent.

Further, the present invention is a sanitary product having a surface sheet positioned on the skin contact surface side, a back sheet positioned on the non-skin contact surface side, and an absorbent body sandwiched therebetween,
On the skin contact surface side from the absorber or the absorber,
A cationic polymer-containing region containing a cationic polymer;
The present invention provides a sanitary product in which a compound-containing region containing the following compound C1 is arranged.
[Compound C1]
A compound having an expansion coefficient of 15 mN / m or more for a liquid having a surface tension of 50 mN / m.

Further, the present invention is a sanitary product having a surface sheet positioned on the skin contact surface side, a back sheet positioned on the non-skin contact surface side, and an absorbent body sandwiched therebetween,
On the skin contact surface side from the absorber or the absorber,
A cationic polymer-containing region containing a cationic polymer;
The present invention provides a sanitary product in which a compound-containing region containing the following compound C2 is arranged.
[Compound C2]
A compound having an expansion coefficient for a liquid having a surface tension of 50 mN / m is greater than 0 mN / m and an interfacial tension for a liquid having a surface tension of 50 mN / m is 20 mN / m or less.

  The sanitary product of the present invention has a small liquid return amount and is excellent in surface whiteness after use.

FIG. 1 is a schematic view showing a menstrual blood absorption mechanism in the sanitary product of the present invention. FIG. 2A and FIG. 2B are schematic views showing a menstrual blood absorption mechanism in a conventional sanitary product. FIG. 3 is a schematic view showing a liquid film formed in a gap between fibers of a nonwoven fabric. FIG. 4 is an explanatory diagram of a process of cleaving a liquid film with a liquid film cleaving agent according to the present invention, wherein (A1) to (A4) are schematic side views of the cleaved liquid film, (B1) to (B) B4) is a schematic perspective view from above of the liquid film. FIG. 5 is a plan view schematically showing a skin contact surface of a sanitary napkin which is an embodiment of the sanitary product of the present invention. 6 is a cross-sectional view schematically showing a cross section taken along line II of FIG. It is the perspective view which showed only the surface sheet of the sanitary napkin shown in FIG.

  Hereinafter, the present invention will be described based on preferred embodiments thereof. The sanitary product of the present invention generally includes a liquid retaining absorbent. The absorber preferably includes a superabsorbent polymer that is a hydrogel material capable of absorbing and retaining moisture. A liquid-permeable surface sheet can be disposed on the skin contact surface side of the user in the absorbent body. Moreover, a back sheet can be arrange | positioned at the non-skin contact surface side in an absorber. In this specification, the “skin contact surface” is a surface of the sanitary product or a component thereof that is directed toward the user's skin when the sanitary product is used, that is, a surface that is relatively close to the user's skin. is there. Further, in the present specification, the “non-skin contact surface” refers to a surface of the sanitary product or a component thereof, which is directed to the side opposite to the user's skin when using the sanitary product, that is, for clothing such as shorts. In other words, it is a surface that is relatively farther from the user's skin than the skin contact surface.

  The sanitary product of the present invention has a hemagglutinating agent-containing region containing a hemagglutinating agent described in detail later, and a liquid film cleaving agent region containing a liquid membrane cleaving agent described in detail later. By improving the absorption amount of the superabsorbent polymer with the hemagglutinating agent and controlling the liquid diffusion in the absorbent body with the liquid film cleaving agent, the present invention is excellent in reducing the liquid return amount and the surface whiteness after use. Provide sanitary products.

(Hemagglutinating agent)
When the present inventor variously examined the reason why the moisture absorption rate and amount absorbed by the superabsorbent polymer differ depending on the type of moisture, the following facts were found. Blood is roughly divided into liquid components such as plasma and non-liquid components such as red blood cells, and the components absorbed by the superabsorbent polymer are liquid components such as plasma. As shown in FIG. 2 (a), when menstrual blood 1 comes into contact with superabsorbent polymer 4, only liquid component 2 in menstrual blood 1 is absorbed by superabsorbent polymer 4, and red blood cells that are non-liquid component 3 are high. It is not absorbed by the absorbent polymer 4. When the absorption of the liquid component 2 into the superabsorbent polymer 4 proceeds, the non-liquid component 3 that is not absorbed by the superabsorbent polymer 4 accumulates on the surface of the superabsorbent polymer 4 as shown in FIG. A film 5 is formed. Due to the formation of the coating film 5, the liquid absorption inhibition of the superabsorbent polymer 4 occurs, and the absorption rate decreases. In addition, due to the formation of the film 5, swelling inhibition of the superabsorbent polymer 4 also occurs, and the amount of absorption decreases.

  As a result of various studies conducted by the present inventors on the means for preventing the phenomenon as shown in FIG. 2 (b) from occurring and preventing the decrease in absorption performance, a component occupying most of the non-liquid components in menstrual blood It has been found that it is effective to agglomerate erythrocytes as shown in FIG. By forming the erythrocyte aggregate 6, it becomes difficult to form a film of the aggregate 6 on the surface of the superabsorbent polymer 4, or even if a film of the aggregate 6 is generated, the liquid component 2 is contained in the film. Since the space which can permeate | transmit can remain, absorption inhibition of the liquid component 2 becomes difficult to occur. As a result, the superabsorbent polymer 4 can sufficiently exhibit the original absorption performance. Thus, in order to further improve the absorption performance, the larger the aggregate particle size of red blood cells, the better, and the harder the aggregate hardness, the more preferable.

  When this hemagglutinating agent comes into contact with menstrual blood, which is a typical excretion, the hemagglutinating agent elutes during menstrual blood and agglutinates anionic red blood cells contained in menstrual blood to form a hemagglutinin clot. To change menstrual blood. The hemagglutination resulting from the hemagglutination effect is larger than the red blood cells, so even though the hemagglutination may adhere to a part of the surface of the superabsorbent polymer, most of the surface of the superabsorbent polymer is hemagglutinated. The inconvenience of being covered with a lump is unlikely to occur, so that the absorption performance inherent to the superabsorbent polymer is stably exhibited.

  As the hemagglutinating agent used in the sanitary product of the present invention, one having an action capable of aggregating red blood cells in blood is used. Red blood cells aggregated by the hemagglutinating agent become aggregates. Examples of the hemagglutinating agent include a fluid treatment agent described in JP-T-2002-528232 and a blood gelling agent described in JP-A-57-153648. According to these findings, a cationic polymer is useful as the hemagglutinating agent. The reason is as follows. Red blood cells have a red blood cell membrane on their surface. The erythrocyte membrane has a two-layer structure. This two-layer structure is composed of a red blood cell membrane skeleton as a lower layer and a lipid membrane as an upper layer. The lipid film exposed on the surface of erythrocytes contains a protein called glycophorin. Glycophorin has a sugar chain to which a sugar having an anionic charge called sialic acid is bonded at its end. As a result, erythrocytes can be treated as colloidal particles having an anionic charge. In general, an aggregating agent is used for aggregating the colloidal particles. Considering that erythrocytes are anionic colloidal particles, it is advantageous to use a cationic substance as an aggregating agent from the viewpoint of neutralizing the electric double layer of erythrocytes. Further, if the aggregating agent has a polymer chain, the polymer chains of the aggregating agent adsorbed on the surface of the erythrocyte tend to be entangled with each other, thereby promoting the aggregation of erythrocytes. Further, when the aggregating agent has a functional group, it is preferable because the aggregation of erythrocytes is promoted by the interaction between the functional groups. According to the cationic polymer, it becomes possible to produce an aggregate of red blood cells during menstrual blood by the above mechanism of action.

(Characteristic of forming agglomerates)
The hemagglutinating agent used in the present invention acts to agglutinate erythrocytes in the blood and separate the aggregate from the aggregated blood cells and plasma components.
Examples of desirable hemagglutinating agents include those having the following properties.
That is, when 1000 ppm of the measurement sample agent is added to the simulated blood, at least two or more red blood cells aggregate to form an aggregate while maintaining the fluidity of the blood.

The above-mentioned “state in which the fluidity of blood is maintained” means that 10 g of simulated blood to which a measurement sample agent is added 1000 ppm is screw tube bottle (manufactured by Maruemu Co., Ltd., product number “Screw tube No. 4”, mouth inner diameter 14.5 mm, This means a state in which 60% or more of the simulated blood flows down within 20 seconds when the screw tube bottle containing the simulated blood is turned 180 degrees. The “pseudo blood” is a viscosity measured at 25 ° C. using a B-type viscometer (model number TVB-10M manufactured by Toki Sangyo Co., Ltd., measurement conditions: rotor No. 19, 30 rpm, 60 seconds). The blood cell / plasma ratio of defibrinated horse blood (manufactured by Japan Biotest Laboratories) is adjusted to 8 mPa · s.

  Whether or not “two or more red blood cells aggregate to form an aggregate” is determined as follows. That is, the simulated blood to which 1000 ppm of the measurement sample agent was added was diluted 4000 times with physiological saline, and a laser diffraction / scattering type particle size distribution measuring apparatus (manufactured by Horiba, Ltd., model number: LA-950V2, measurement condition: flow type). The median diameter of volume average particle size measured at a temperature of 25 ° C. by a laser diffraction scattering method using cell measurement, circulation speed 1, no ultrasonic wave) corresponds to the size of an aggregate obtained by aggregating two or more red blood cells. If it is 10 μm or more, it is determined that “two or more red blood cells aggregate to form an aggregate”.

The hemagglutinating agent used in the present invention satisfies the above-mentioned properties by a single compound that meets the above-mentioned properties, a mixture of a plurality of single compounds that meet the above-mentioned properties, or a combination of a plurality of compounds. Agent capable of expressing aggregation). That is, the hemagglutinating agent is an agent limited to those having a hemagglutinating action as defined above. Therefore, if the compound applied in the sanitary product contains a third component that does not meet the above definition, it is distinguished from a hemagglutinating agent. Here, the term “single compound” is a concept including compounds having the same composition formula but having different molecular weights due to different numbers of repeating units.
As the hemagglutinating agent, those described in International Publication No. 2016/093233 can be arbitrarily used.

  The hemagglutinating agent preferably has a blood aggregation rate of 0.75 mPa · s / s or less. The blood aggregation rate is a measure of the ability of the hemagglutinating agent to aggregate blood to form an aggregate, and the smaller the value, the smaller the aggregate size after a certain time. That is, when blood is aggregated with a hemagglutinating agent, if the size of the aggregate formed after a certain period of time is large, the components of the sanitary product are clogged by the aggregate, and the liquid permeation occurs. However, by controlling the agglomeration rate, the absorption capacity of the superabsorbent polymer can be improved without causing a decrease in liquid permeability due to the aggregate. This simultaneously satisfies the trade-off requirement of improving the liquid permeability and improving the absorption capacity of the superabsorbent polymer. From this viewpoint, the aggregation rate is more preferably 0.32 mPa · s / s or less, and further preferably 0.15 mPa · s / s or less. The lower limit of the aggregation rate is preferably 0.001 mPa · s / s or more, and more preferably 0.01 mPa · s / s or more.

The aggregation rate is measured by the following method. The blood used for the measurement of the aggregation rate is the pseudo blood described above. Using a rheometer (HAAKE RheoStress 6000 manufactured by Thermo Fisher Scientific, Inc.), 2 μL of physiological saline in which 5% of a hemagglutinating agent is dissolved in advance is added dropwise to 200 μL of blood preliminarily developed on the stage. The viscosity change was measured using a plate (tilt 1 degree), temperature 30 degrees, and shear rate 10 ¹ (second ^-1 ). The viscosity change is measured for 50 seconds, the obtained plot is linearly approximated, and the aggregation rate is calculated from the slope of the straight line.

  Suitable hemagglutinating agents for use in the present invention include those containing a cationic polymer. The cationic polymer may be disposed at any location on the skin contact surface side of the absorbent body or the absorbent body. However, a cationic polymer having an opposite charge is provided in the vicinity of the anionic superabsorbent polymer. Non-existence is preferable because elution of the cationic polymer into menstrual blood is not suppressed, erythrocytes tend to aggregate, and a high absorptive polymer can obtain a sufficient aggregation effect before absorbing the liquid.

  Examples of the cationic polymer include cationized cellulose and cationized starch such as hydroxypropyltrimonium chloride. The hemagglutinating agent used in the present invention can also contain a quaternary ammonium salt homopolymer, a quaternary ammonium salt copolymer or a quaternary ammonium salt polycondensate as a cationic polymer. In the present invention, the “quaternary ammonium salt” includes a compound having a plus monovalent charge at the nitrogen atom position, or a compound that generates a plus monovalent charge at the nitrogen atom position by neutralization. Specific examples thereof include a salt of a quaternary ammonium cation, a neutralized salt of a tertiary amine, and a tertiary amine having a cation in an aqueous solution. The “quaternary ammonium moiety” described below is also used in the same meaning and is a moiety that is positively charged in water. Further, in the present invention, the “copolymer” is a polymer obtained by copolymerization of two or more kinds of polymerizable monomers, and is a binary copolymer or a ternary copolymer or more. Includes both things. In the present invention, the “polycondensate” is a polycondensate obtained by polymerizing a condensate composed of two or more monomers.

  When the hemagglutinating agent used in the present invention contains a quaternary ammonium salt homopolymer and / or a quaternary ammonium salt copolymer and / or a quaternary ammonium salt polycondensate as a cationic polymer, the blood cells The flocculant may contain any one of a quaternary ammonium salt homopolymer, a quaternary ammonium salt copolymer and a quaternary ammonium salt polycondensate, or any two or more of them. Combinations may be included. Moreover, a quaternary ammonium salt homopolymer can be used individually by 1 type or in combination of 2 or more types. Similarly, the quaternary ammonium salt copolymer can be used alone or in combination of two or more. Furthermore, similarly, a quaternary ammonium salt polycondensate can be used individually by 1 type or in combination of 2 or more types.

  Of the various cationic polymers described above, in particular, the use of a quaternary ammonium salt homopolymer, a quaternary ammonium salt copolymer or a quaternary ammonium salt polycondensate from the viewpoint of adsorptivity to erythrocytes. preferable. In the following description, for convenience, the quaternary ammonium salt homopolymer, the quaternary ammonium salt copolymer and the quaternary ammonium salt polycondensate are collectively referred to as “quaternary ammonium salt polymer”.

  The quaternary ammonium salt homopolymer is obtained by polymerizing one type of polymerizable monomer having a quaternary ammonium moiety. On the other hand, the quaternary ammonium salt copolymer uses at least one polymerizable monomer having a quaternary ammonium moiety and, if necessary, at least one polymerizable monomer having no quaternary ammonium moiety. It was obtained by using seeds and copolymerizing them. That is, the quaternary ammonium salt copolymer is obtained by using two or more polymerizable monomers having a quaternary ammonium moiety and copolymerizing them, or having a quaternary ammonium moiety. It is obtained by copolymerizing one or more polymerizable monomers having one or more polymerizable monomers having no quaternary ammonium moiety. The quaternary ammonium salt copolymer may be a random copolymer, an alternating copolymer, a block copolymer, or a graft copolymer. The quaternary ammonium salt polycondensate is obtained by polymerizing these condensates using a condensate composed of one or more monomers having a quaternary ammonium moiety. That is, the quaternary ammonium salt polycondensate is obtained by polymerizing two or more kinds of condensates having a quaternary ammonium moiety, or quaternary ammonium moieties. And a condensate comprising one or more monomers having quaternary ammonium moieties and one or more monomers having no quaternary ammonium moiety, and obtained by condensation polymerization.

  A quaternary ammonium salt polymer is a cationic polymer having a quaternary ammonium moiety. A quaternary ammonium moiety can be generated by quaternary ammoniumation of a tertiary amine using an alkylating agent. Alternatively, the tertiary amine can be dissolved in acid or water and generated by neutralization. Or it can produce | generate by the quaternary ammonium formation by the nucleophilic reaction containing a condensation reaction. Examples of the alkylating agent include alkyl halides and dialkyl sulfates such as dimethyl sulfate and dimethyl sulfate. Of these alkylating agents, the use of dialkyl sulfate is preferable because the problem of corrosion that may occur when an alkyl halide is used does not occur. Examples of the acid include hydrochloric acid, sulfuric acid, nitric acid, acetic acid, citric acid, phosphoric acid, fluorosulfonic acid, boric acid, chromic acid, lactic acid, oxalic acid, tartaric acid, gluconic acid, formic acid, ascorbic acid, and hyaluronic acid. . In particular, it is preferable to use a quaternary ammonium salt polymer in which a tertiary amine moiety is quaternized with an alkylating agent, because the electric double layer of erythrocytes can be reliably neutralized. Quaternary ammoniumation by a nucleophilic reaction including a condensation reaction can be caused by a ring-opening polycondensation reaction of dimethylamine and epichlorohydrin or a cyclization reaction of dicyandiamide and diethylenetriamine.

  From the viewpoint of effectively producing an aggregate of erythrocytes, the cationic polymer preferably has a molecular weight of 2000 or more, more preferably 10,000 or more, and even more preferably 30,000 or more. When the molecular weight of the cationic polymer is not less than these values, the entanglement of the cationic polymers between the erythrocytes and the crosslinking of the cationic polymer between the erythrocytes are sufficiently caused. The upper limit of the molecular weight is preferably 10 million or less, more preferably 5 million or less, and even more preferably 3 million or less. When the molecular weight of the cationic polymer is not more than these values, the cationic polymer dissolves well into menstrual blood. The molecular weight of the cationic polymer is preferably 2000 or more and 10 million or less, more preferably 2000 or more and 5 million or less, still more preferably 2000 or more and 3 million or less, and 10,000 or more and 3 million or less. It is even more preferable, and it is particularly preferably 30,000 to 3,000,000. The molecular weight referred to in the present invention is a weight average molecular weight. The molecular weight of the cationic polymer can be controlled by appropriately selecting the polymerization conditions. The molecular weight of the cationic polymer can be measured by the method described later.

  From the viewpoint of effectively producing red blood cell aggregates, the cationic polymer is preferably water-soluble. “Water-soluble” as used herein refers to those having a water solubility of 100 g or more as measured by the method described below.

  The cationic polymer preferably has a structure having a main chain and a plurality of side chains bonded thereto. In particular, the quaternary ammonium salt polymer preferably has a structure having a main chain and a plurality of side chains bonded thereto. The quaternary ammonium moiety is preferably present in the side chain. In this case, when the main chain and the side chain are bonded at one point, the flexibility of the side chain is difficult to be hindered, and the quaternary ammonium moiety present in the side chain is smoothly formed on the surface of the erythrocyte. Adsorbs. However, in the present invention, it is not hindered that the main chain and the side chain of the cationic polymer are bonded at two points or more. In the present invention, “bonded at one point” means that one of the carbon atoms constituting the main chain is single-bonded with one carbon atom located at the end of the side chain. . “Connected at two or more points” means that two or more of the carbon atoms constituting the main chain are each single-bonded with two or more carbon atoms located at the end of the side chain. Say.

  When the cationic polymer has a structure having a main chain and a plurality of side chains bonded thereto, for example, a quaternary ammonium salt polymer has a structure having a main chain and a plurality of side chains bonded thereto. In this case, the number of carbon atoms in each side chain is preferably 4 or more, more preferably 5 or more, and even more preferably 6 or more. The upper limit of the carbon number is preferably 10 or less, more preferably 9 or less, and even more preferably 8 or less. For example, the number of carbon atoms in the side chain is preferably 4 or more and 10 or less, more preferably 5 or more and 9 or less, and still more preferably 6 or more and 8 or less. The carbon number of the side chain is the carbon number of the quaternary ammonium moiety (cation moiety) in the side chain, and even if carbon is contained in the anion that is the counter ion, the carbon is counted. Not included. In particular, among the carbon atoms in the side chain, the number of carbon atoms from the carbon atom bonded to the main chain to the carbon atom bonded to the quaternary nitrogen is within the aforementioned range, so that the quaternary ammonium salt. This is preferable because the steric hindrance when the polymer is adsorbed on the surface of the erythrocyte is reduced.

  When the quaternary ammonium salt polymer is a quaternary ammonium salt homopolymer, examples of the homopolymer include a polymer of a vinyl monomer having a quaternary ammonium moiety or a tertiary amine moiety. . In the case of polymerizing a vinyl monomer having a tertiary amine moiety, a quaternary ammonium salt homopolymer in which the tertiary amine moiety is quaternized with an alkylating agent before and / or after polymerization. Becomes a polymer, becomes a tertiary amine neutralized salt obtained by neutralizing a tertiary amine site with an acid before and / or after polymerization, or becomes a tertiary amine having a cation in an aqueous solution after polymerization. . Examples of the alkylating agent and the acid are as described above.

  In particular, the quaternary ammonium salt homopolymer preferably has a repeating unit represented by the following formula 1.

  Specific examples of the quaternary ammonium salt homopolymer include polyethyleneimine. Further, poly (2-methacryloxyethyldimethylamine quaternary salt), poly (2-methacryloxyethyltrimethylamine quaternary salt) in which the side chain having a quaternary ammonium moiety is bonded to the main chain at one point. Salt), poly (2-methacryloxyethyldimethylethylammonium ethyl sulfate), poly (2-acryloxyethyldimethylamine quaternary salt), poly (2-acryloxyethyltrimethylamine quaternary salt), poly (2-acrylic) Oxyethyldimethylethylammonium ethyl sulfate), poly (3-dimethylaminopropylacrylamide quaternary salt), dimethylaminoethyl polymethacrylate, polyallylamine hydrochloride, cationized cellulose, polyethyleneimine, polydimethylaminopropylacrylamide, polyamidine, etc. It is below. On the other hand, examples of the homopolymer in which the side chain having a quaternary ammonium moiety is bonded to the main chain at two or more points include polydiallyldimethylammonium chloride and polydiallylamine hydrochloride.

When the quaternary ammonium salt polymer is a quaternary ammonium salt copolymer, two kinds of polymerizable monomers used for the polymerization of the quaternary ammonium salt homopolymer described above are used as the copolymer. A copolymer obtained by the above copolymerization can be used. Alternatively, as a quaternary ammonium salt copolymer, one or more polymerizable monomers used for the polymerization of the quaternary ammonium salt homopolymer described above and a polymerizable monomer having no quaternary ammonium moiety The copolymer obtained by copolymerizing using 1 or more types of bodies can be used. Furthermore, in addition to or instead of the vinyl polymerizable monomer, other polymerizable monomers such as —SO ₂ — may be used. As described above, the quaternary ammonium salt copolymer can be a binary copolymer or a ternary or higher copolymer.

  In particular, the quaternary ammonium salt copolymer has a repeating unit represented by the above-described formula 1 and a repeating unit represented by the following formula 2 to effectively produce an agglomerate of erythrocytes. It is preferable from the viewpoint.

  Further, as the polymerizable monomer having no quaternary ammonium moiety, a cationic polymerizable monomer, an anionic polymerizable monomer, or a nonionic polymerizable monomer can be used. Among these polymerizable monomers, in particular, by using a cationic polymerizable monomer or a nonionic polymerizable monomer, charge cancellation with a quaternary ammonium moiety in a quaternary ammonium salt copolymer is achieved. Therefore, erythrocyte aggregation can be effectively generated. Examples of cationic polymerizable monomers include linear compounds having a cation-carrying nitrogen atom in the main chain, such as vinylpyridine as a cyclic compound having a cation-carrying nitrogen atom under a particular condition And a condensed compound of dicyandiamide and diethylenetriamine. Examples of the anionic polymerizable monomer include 2-acrylamido-2-methylpropanesulfonic acid, methacrylic acid, acrylic acid, styrenesulfonic acid, and salts of these compounds. On the other hand, examples of nonionic polymerizable monomers include vinyl alcohol, acrylamide, dimethylacrylamide, ethylene glycol monomethacrylate, ethylene glycol monoacrylate, hydroxyethyl methacrylate, hydroxyethyl acrylate, methyl methacrylate, methyl acrylate, ethyl methacrylate, ethyl Examples include acrylate, propyl methacrylate, propyl acrylate, butyl methacrylate, and butyl acrylate. One of these cationic polymerizable monomers, anionic polymerizable monomers, or nonionic polymerizable monomers can be used, or any two or more of them can be used in combination. Can do. Also, two or more cationic polymerizable monomers can be used in combination, two or more anionic polymerizable monomers can be used in combination, or two or more nonionic polymerizable monomers can be used in combination. Can also be used. A quaternary ammonium salt copolymer copolymerized using a cationic polymerizable monomer, an anionic polymerizable monomer and / or a nonionic polymerizable monomer as a polymerizable monomer has a molecular weight of However, as described above, it is preferably 10 million or less, particularly 5 million or less, and particularly preferably 3 million or less (the same applies to the quaternary ammonium salt copolymer exemplified below).

A polymerizable monomer having a functional group capable of hydrogen bonding can also be used as the polymerizable monomer having no quaternary ammonium moiety. When such a polymerizable monomer is used for copolymerization, and when erythrocytes are aggregated using a quaternary ammonium salt copolymer obtained therefrom, a hard aggregate is likely to be formed. Absorption performance is less likely to be disturbed. Examples of the functional group capable of hydrogen bonding include —OH, —NH ₂ , —CHO, —COOH, —HF, —SH, and the like. Examples of polymerizable monomers having functional groups capable of hydrogen bonding include hydroxyethyl methacrylate, vinyl alcohol, acrylamide, dimethylacrylamide, ethylene glycol, propylene glycol, ethylene glycol monomethacrylate, ethylene glycol monoacrylate, Examples thereof include hydroxyethyl methacrylate and hydroxyethyl acrylate. In particular, hydroxyethyl methacrylate, 2-hydroxyethyl methacrylate, hydroxyethyl acrylate, dimethylacrylamide, and the like, in which hydrogen bonds work strongly, are preferable because the adsorption state of quaternary ammonium salt polymers on erythrocytes is stabilized. These polymerizable monomers can be used individually by 1 type or in combination of 2 or more types.

  As the polymerizable monomer having no quaternary ammonium moiety, a polymerizable monomer having a functional group capable of hydrophobic interaction can also be used. By using such a polymerizable monomer for copolymerization, the same advantageous effect as that in the case of using a polymerizable monomer having a functional group capable of hydrogen bonding described above, that is, the hardness of erythrocytes The effect that it becomes easy to produce an agglomerate is produced. Examples of functional groups capable of hydrophobic interaction include alkyl groups such as methyl, ethyl, and butyl groups, phenyl groups, alkylnaphthalene groups, and fluorinated alkyl groups. Examples of polymerizable monomers having functional groups capable of hydrophobic interaction include methyl methacrylate, methyl acrylate, ethyl methacrylate, ethyl acrylate, propyl methacrylate, propyl acrylate, butyl methacrylate, butyl acrylate, styrene, etc. Is mentioned. In particular, methyl methacrylate, methyl acrylate, butyl methacrylate, butyl acrylate, etc., which have a strong hydrophobic interaction and do not significantly reduce the solubility of the quaternary ammonium salt polymer, are adsorbed to erythrocytes by the quaternary ammonium salt polymer. Is preferable because of stabilization. These polymerizable monomers can be used individually by 1 type or in combination of 2 or more types.

  The molar ratio of the polymerizable monomer having a quaternary ammonium moiety and the polymerizable monomer having no quaternary ammonium moiety in the quaternary ammonium salt copolymer is the quaternary ammonium salt. It is preferable that the red blood cells are appropriately adjusted so as to be sufficiently aggregated by the ammonium salt copolymer. In particular, the molar ratio of the polymerizable monomer having a quaternary ammonium moiety in the quaternary ammonium salt copolymer is preferably 10 mol% or more, more preferably 22 mol% or more, and 32 mol. % Or more, more preferably 38 mol% or more. Further, it is 100 mol% or less, preferably 80 mol% or less, more preferably 65 mol% or less, and still more preferably 56 mol% or less. Specifically, the molar ratio of the polymerizable monomer having a quaternary ammonium moiety is preferably 10 mol% or more and 100 mol% or less, more preferably 22 mol% or more and 80 mol% or less, More preferably, it is 32 mol% or more and 65 mol% or less, and more preferably 38 mol% or more and 56 mol% or less.

  When the quaternary ammonium salt polymer is a quaternary ammonium salt polycondensate, as the polycondensate, a condensate composed of one or more monomers having the quaternary ammonium moiety described above is used. Polycondensates obtained by polymerizing these condensates can be used. Specific examples include dicyandiamide / diethylenetriamine polycondensate, dimethylamine / epichlorohydrin polycondensate, and the like.

  The above-described quaternary ammonium salt homopolymer and quaternary ammonium salt copolymer can be obtained by a homopolymerization method or a copolymerization method of a vinyl polymerizable monomer. As the polymerization method, for example, radical polymerization, living radical polymerization, living cation polymerization, living anion polymerization, coordination polymerization, ring-opening polymerization, polycondensation and the like can be used. There are no particular limitations on the polymerization conditions, and the conditions under which a quaternary ammonium salt polymer having the desired molecular weight, streaming potential, and / or IOB value can be obtained may be appropriately selected.

  For example, the flow potential of the quaternary ammonium salt polymer is preferably 1500 μeq / L or more, more preferably 2000 μeq / L or more, more preferably 3000 μeq / L, from the viewpoint of more effectively generating red blood cell aggregates. L or more is more preferable, and 4000 μeq / L or more is even more preferable. When the flow potential of the quaternary ammonium salt polymer is not less than these values, the electric double layer of erythrocytes can be sufficiently neutralized. The upper limit of the streaming potential is preferably 13000 μeq / L or less, more preferably 8000 μeq / L or less, and even more preferably 6000 μeq / L or less. When the flow potential of the quaternary ammonium salt polymer is below these values, the electrical repulsion between the quaternary ammonium salt polymers adsorbed on the erythrocytes can be effectively prevented.

The flow potential of the quaternary ammonium salt polymer adjusts, for example, the molecular weight of the constituting cationic monomer itself, and the copolymerization molar ratio of the cationic monomer and the anionic monomer or nonionic monomer constituting the copolymer. Can be controlled. The streaming potential of the quaternary ammonium salt polymer can be measured using a streaming potential measuring device (PCD04) manufactured by Spectris Co., Ltd. Specific measurement conditions are as follows. First, with respect to a commercially available sanitary product, the hot melt bonding each member is invalidated using a dryer or the like, and is disassembled into members such as a top sheet, an absorber, and a back sheet. For each decomposed member, a multi-stage solvent extraction method from a nonpolar solvent to a polar solvent is performed to separate the treating agent used in each member to obtain a solution containing a single composition. The obtained solution was dried and solidified, and ¹ H-NMR (nuclear magnetic resonance), IR (infrared spectroscopy), LC (liquid chromatography), GC (gas chromatography), MS (mass spectrometry), GPC ( Gel permeation chromatography), fluorescent X-rays, etc. are combined to identify the structure of the treatment agent. With respect to a measurement sample in which 0.001 g of a treatment agent (quaternary ammonium salt polymer) to be measured is dissolved in 10 g of physiological saline, a 0.001N sodium polyethylene sulfonate aqueous solution (if the measurement sample has a negative charge) , 0.001N polydiallyldimethylammonium chloride aqueous solution) is titrated, and the titer XmL required until the potential difference between the electrodes disappears is measured. Thereafter, the streaming potential of the quaternary ammonium salt polymer is calculated by the following formula.
Streaming potential = (X + 0.190 ^* ) x 1000
(* Titration required for the physiological saline solution)

  In order for the quaternary ammonium salt polymer to be successfully adsorbed on the surface of erythrocytes, it is advantageous that the quaternary ammonium salt polymer is likely to interact with the sialic acid described above. From this point of view, the present inventors proceeded with studies, and as a result, inorganic value / organic value (hereinafter referred to as “IOB (Inorganic Organic Balance) value”), which is the ratio between the inorganic value and the organic value of the substance. It was found that the degree of interaction between the sialic acid conjugate and the cationic polymer can be evaluated on the basis of.

  In general, the properties of a substance are largely governed by various intermolecular forces between molecules, and this intermolecular force mainly consists of Van Der Waals force due to molecular mass and electrical affinity due to molecular polarity. If the Van Der Waals force, which has a great influence on changes in the properties of substances, and the electrical affinity can be grasped individually, the properties of unknown substances or their mixtures can be predicted from the combination. be able to. This idea is a theory well known as “organic conceptual diagram”. Conceptual diagram of organic materials is, for example, “Organic analysis” written by Kei Fujita (Kanya Shoten, Showa 5), “Organic qualitative analysis: Systematic. Pure products” by Kyoda Fujita (Kyoritsu Shuppan, 1953) "Reform Chemistry Experiments-Organic Chemistry" by Kawasaki Sho (1971), "Systematic Organic Qualitative Analysis (mixture)" by Kaoru Fujita and Masami Akatsuka (Kasama Shobo, 1974), and Yoshio Koda It is described in detail in Shiro Sato and Yoshio Honma's “New Edition Organic Conceptual Diagram Basics and Applications” (Sankyo Publishing, 2008). In the conceptual diagram of organic matter, regarding the physicochemical properties of substances, the degree of physical properties due to the Van Der Waals force is called “organic”, and the degree of physical properties mainly due to electrical affinity is called “inorganic”. The physical properties of substances are considered as a combination of “organic” and “inorganic”. Then, one carbon (C) is defined as organic 20, and the inorganic and organic values of various polar groups are defined as shown in Table 1 below. The sum of the values is obtained, and the ratio between the two is defined as the IOB value. In the present invention, the IOB value of the sialic acid conjugate described above is determined based on these organic and inorganic values, and the IOB value of the cationic polymer is determined based on the value.

Specifically, it has been found advantageous to use a cationic polymer having an IOB value that is the same as or close to that of the sialic acid conjugate. The sialic acid conjugate is a compound in which sialic acid can exist in a living body, and examples thereof include a compound in which sialic acid is bound to the end of a glycolipid such as galactolipid. The IOB value of sialic acid is 4.25 for sialic acid alone and 3.89 for sialic acid conjugate. The sialic acid conjugate is a glycolipid in which a sugar chain in a glycolipid and sialic acid are bound, and the sialic acid conjugate has a higher organic value ratio and a lower IOB value than sialic acid alone.
Therefore, the IOB value of the quaternary ammonium salt polymer is preferably 0.6 or more, more preferably 1.8 or more, further preferably 2.1 or more, and 2.2 or more. More preferably it is. Further, the IOB value of the cationic polymer is preferably 4.6 or less, more preferably 3.6 or less, and even more preferably 3 or less. The IOB value is more preferably 1.8 or more and 3.6 or less, further preferably 2.1 or more and 3.6 or less, and further preferably 2.2 or more and 3 or less.

When the quaternary ammonium salt polymer is a copolymer, the IOB value is calculated according to the following procedure according to the molar ratio of the monomers used for the copolymerization. That is, a copolymer is obtained from monomer A and monomer B, the organic value of monomer A is OR _A , the inorganic value is IN _A , the organic value of monomer B is OR _B , the inorganic value There is iN _B, when the molar ratio of the monomer a / monomer B is _M a / _{M B,} IOB value of copolymer is calculated from the following equation.

  In addition to the polycation (cationic polymer), the hemagglutinating agent used in the present invention contains other components such as a third component such as a solvent, a plasticizer, a fragrance, an antibacterial / deodorant, and a skin care agent. It may be in the form of a composition (hemagglutinating agent composition) containing more than one species. As the solvent, water, a water-soluble organic solvent such as a saturated aliphatic monohydric alcohol having 1 to 4 carbon atoms, or a mixed solvent of the water-soluble organic solvent and water can be used. As the plasticizer, glycerin, polyethylene glycol, propylene glycol, ethylene glycol, 1,3-butanediol, or the like can be used. As a fragrance | flavor, the fragrance | flavor which has the green herbal-like fragrance | flavor described in Unexamined-Japanese-Patent No. 2007-244762, a plant extract, a citrus extract, etc. can be used. As the antibacterial / deodorant, a cancrinite-like mineral containing a metal having antibacterial properties described in JP-A-2004-244789, and a polymerizable group having a phenyl group described in JP-A-2007-097953 Porous polymers polymerized from monomers, quaternary ammonium salts described in JP-A-2006-191966, activated carbon, clay minerals, and the like can be used. As the skin care agent, plant extracts, collagen, natural moisturizing ingredients, moisturizing agents, keratin softening agents, anti-inflammatory agents and the like described in JP-A No. 2004-255164 can be used.

  The proportion of the cationic polymer in the hemagglutinating agent composition is preferably 20% by mass or more, more preferably 40% by mass or more, and further preferably 50% by mass or more. Further, it is preferably 99% by mass or less, more preferably 80% by mass or less, and still more preferably 60% by mass or less. By setting the proportion of the cationic polymer in the hemagglutinating agent composition within this range, an effective amount of the cationic polymer can be imparted to the sanitary product.

The hemagglutinating agent contained in the sanitary product dissolves in the blood and acts reliably to form a large aggregate. The content thereof is preferably 0.01 g / m ² or more, and 0.5 g / M ² or more is more preferable. Further, hemagglutination agent contained in catamenial, from the viewpoint of not inhibiting the permeability of the liquid, its content is preferably 20 g / m ² or less, 10 g / m ² or less is more preferable. Specifically, the content of the hemagglutinating agent contained in the sanitary product is preferably 0.01 g / m ² or more and 20 g / m ² or less, and more preferably 0.5 g / m ² or more and 10 g / m ² or less.

(Liquid film cleaving agent)
A liquid film cleaving agent refers to the formation of a liquid film by cleaving a liquid film, for example, a highly viscous excretion fluid such as menstrual blood, touching the nonwoven fabric to cleave the liquid film formed between the fibers of the nonwoven fabric or on the fiber surface It refers to an inhibitor that has an action of cleaving the formed liquid film and an action of inhibiting the formation of the liquid film. The former can be called the main action, and the latter can be called the subordinate action. The cleavage of the working liquid film is performed by the action of the liquid film cleaving agent to destabilize the liquid film by pushing away a part of the liquid film layer. By the action of the liquid film cleaving agent, the liquid can easily pass through without staying in a narrow region between the fibers of the nonwoven fabric. That is, the nonwoven fabric has excellent liquid permeability. Thereby, even if the fiber which comprises a nonwoven fabric is made thin and the distance between fibers is narrowed, softness of touch and liquid remaining suppression are compatible. In the present invention, the use of the hemagglutinating agent stably exhibits the inherent absorption performance of the superabsorbent polymer and effectively suppresses liquid return, while the surface of the sanitary product after use (skin As for the color of the abutment surface), the surface whiteness that has been used when not in use tends to be greatly reduced and the red color caused by blood tends to become strong. By using a hemagglutinating agent and a liquid film cleaving agent in combination, Since the reduction of the surface whiteness caused by the flocculant is suppressed by the action of the liquid film cleaving agent, both the reduction of the liquid return amount and the improvement of the surface whiteness after use can be achieved.

  This liquid film cleaving effect occurs not only between the fibers of the nonwoven fabric as long as a liquid film cleaving agent is disposed at a position where the liquid film can exist. For example, in an absorber having fluff pulp or a superabsorbent polymer, the liquid film formed between the fluff pulp fibers, between the superabsorbent polymer particles, between the fluff pulp and the superabsorbent polymer particles, etc. Can also produce a liquid film cleavage effect.

  In the present invention, the fact that the constituent material of a sanitary product contains or contains a liquid film cleaving agent mainly means a state where it is attached to the surface of the material. However, for example, when the fiber contains a liquid film cleaving agent, the liquid film cleaving agent is contained in the fiber as long as it remains on the surface of the fiber, or is present inside the fiber by internal addition. There may be something like this.

  In order for the liquid film cleaving agent according to the present invention to have a liquid film cleaving effect described later in a sanitary product, the liquid film cleaving agent needs to exist as a liquid when it comes into contact with a body fluid. From this point, the melting point of the liquid film cleaving agent according to the present invention is preferably 40 ° C. or less, and more preferably 35 ° C. or less. Furthermore, the melting point of the liquid film cleaving agent according to the present invention is preferably −220 ° C. or higher, more preferably −180 ° C. or higher.

(Characteristic of disappearing liquid film)
The liquid film cleaving agent used in the present invention has a property of erasing the liquid film, and due to this property, the liquid film cleaving agent is applied when the liquid film cleaving agent is applied to a test liquid mainly composed of plasma components. An effect can be expressed. The liquid film disappearance effect here refers to the effect of inhibiting the liquid film formation of the structure and the formed structure with respect to the structure in which air is held by a large number of liquid films formed from the test solution. It can be said that the agent that includes both the effect of disappearing and exhibits at least one of the effects has a property of exhibiting the effect of disappearing the liquid film.

  The test solution is a liquid component extracted from defibrinated horse blood (manufactured by Japan Biotest Laboratories, Inc.). Specifically, when 100 mL of defibrinated horse blood is allowed to stand at a temperature of 22 ° C. and a humidity of 65% for 1 hour, the defibrinated horse blood is separated into an upper layer and a lower layer. It is. The upper layer mainly contains plasma components, and the lower layer mainly contains blood cell components. In order to take out only the upper layer from defibrinated horse blood separated into an upper layer and a lower layer, for example, a transfer pipette (manufactured by Nippon Micro Corporation) can be used.

  Whether or not a certain agent has the above-mentioned property of “disappearing the liquid film” is a state in which a structure in which air is trapped by a liquid film formed from the test solution to which the agent is applied is likely to be generated. In some cases, it is determined by the amount of the structure, that is, the liquid film. That is, the test solution is adjusted to a temperature of 25 ° C., and then 10 g is put into a screw tube (No. 5 body diameter 27 mm, total length 55 mm, manufactured by Marum Co., Ltd.) to obtain a standard sample. In addition, a measurement sample obtained by adding 0.01 g of an agent to be measured, which is adjusted in advance to 25 ° C., to the same sample as the standard sample is obtained. Each of the standard sample and the measurement sample is vigorously shaken twice in the vertical direction of the screw tube, and then quickly placed on a horizontal plane. By shaking the sample, the structure of the liquid layer (lower layer) without the structure and a large number of structures formed on the liquid layer (the lower layer) is formed inside the screw tube after shaking. Upper layer). After the elapse of 10 seconds immediately after shaking, the height of the structure layers of both samples (the height from the liquid surface of the liquid layer to the upper surface of the structure layer) is measured. When the height of the structure layer of the measurement sample is 90% or less with respect to the height of the structure layer of the standard sample, it is determined that the agent to be measured has a liquid film cleavage effect. .

The liquid film cleaving agent used in the present invention satisfies the above properties by a single compound that applies to the above properties, a mixture of a plurality of single compounds that apply to the above properties, or a combination of a plurality of compounds (liquid Agent capable of developing membrane cleavage). That is, the liquid film cleaving agent is an agent limited to those having a liquid film cleaving effect as defined above. Therefore, if the compound applied in the sanitary product contains a third component that does not meet the above definition, it is distinguished from a liquid film cleaving agent. As used herein, the term “single compound” is a concept that includes compounds having the same composition formula but having different molecular weights due to different numbers of repeating units.
As the liquid film cleaving agent, those described in International Publication No. 2016/098796 can be arbitrarily used.

  Hereinafter, preferred embodiments of the liquid film cleaving agent according to the present invention will be described. There are two types of liquid film cleaving agents according to the present invention, the first embodiment and the second embodiment.

  The liquid film cleaving agent of the first embodiment is compound C1. Compound C1 is a compound having an expansion coefficient of 15 mN / m or more and a water solubility of 0 g or more and 0.025 g or less with respect to a liquid having a surface tension of 50 mN / m.

The “expansion coefficient for a liquid having a surface tension of 50 mN / m” possessed by the liquid film cleaving agent of the first embodiment refers to an expansion coefficient that assumes the excretion liquid such as menstrual blood as described above. The “expansion coefficient” is a value obtained based on the following formula (1) from a measurement value obtained by a measurement method described later in an environmental region at a temperature of 25 ° C. and a relative humidity (RH) of 65%. “Liquid film” in γ _w and γ _wo in the formula (1) means a liquid phase of “liquid having a surface tension of 50 mN / m”, and is a liquid or film in a state where a film is stretched between fibers or on the fiber surface. It includes both liquids in the state prior to spreading, and is also simply referred to as liquid. In addition, the “surface tension” in γ _w and γ _o in the following formula (1) means an interfacial tension at the interface between the liquid film and the liquid film cleaving agent and the liquid film cleaving agent between the liquid phases. It is distinguished from the interfacial tension with the liquid film. This distinction applies to other descriptions in the present specification.
_{S = γ w -γ o -γ wo} ····· (1)
γ _w : surface tension of liquid film (liquid)
γ _o : surface tension of liquid film cleaving agent
γ _wo : Interfacial tension of liquid film cleaving agent with liquid film

As can be seen from the above formula (1), the expansion coefficient (S) of the liquid film cleaving agent increases as the surface tension (γ _o ) of the liquid film cleaving agent decreases, and the interface of the liquid film cleaving agent with the liquid film The tension increases as the tension (γ _wo ) decreases. When the expansion coefficient is 15 mN / m or more, the liquid film cleaving agent according to the first embodiment has high mobility on the surface of the liquid film generated in a narrow region between fibers, that is, high diffusibility. From this viewpoint, the expansion coefficient of the liquid film cleaving agent of the first embodiment is more preferably 20 mN / m or more, further preferably 25 mN / m or more, and particularly preferably 30 mN / m or more. On the other hand, the upper limit is not particularly limited, but when a liquid having a surface tension of 50 mN / m is used according to the formula (1), a liquid having an upper limit of 50 mN / m and a surface tension of 60 mN / m is used. In the case of using a liquid having an upper limit of 60 mN / m and a surface tension of 70 mN / m, the upper limit of the surface tension of the liquid forming the liquid film becomes the upper limit. Therefore, in the present invention, from the viewpoint of using a liquid having a surface tension of 50 mN / m, the expansion coefficient of the liquid film cleaving agent of the first embodiment is 50 mN / m or less.

The liquid film cleaving agent of the first embodiment has a water solubility of 0 g or more and 0.025 g or less, so that it hardly dissolves in an aqueous liquid and forms an interface with the liquid film, thereby making the diffusibility more effective. It shall be From the same viewpoint, the water solubility of the liquid film cleaving agent of the first embodiment is preferably 0.025 g or less, more preferably 0.0017 g or less, and still more preferably less than 0.0001 g. The water solubility is preferably as small as possible, and is 0 g or more. From the viewpoint of diffusibility into the liquid film, it is practical to set the water solubility to 1.0 × 10 ⁻⁹ g or more. In addition, it is thought that the said water solubility is applicable also to the menstrual blood etc. which have a water | moisture content as a main component. The water solubility of the liquid film cleaving agent can be measured by the method described later.

The surface tension (γ _w ) of the liquid film (liquid having a surface tension of 50 mN / m), the surface tension (γ _o ) of the liquid film cleaving agent, and the interfacial tension (γ _wo ) of the liquid film cleaving agent with the liquid film. Is measured by the following method.

(Measurement method of surface tension (γ _w ) of liquid film (liquid))
Measurement can be performed using a platinum plate by the plate method (Wilhelmy method) in an environmental region at a temperature of 25 ° C. and a relative humidity (RH) of 65%. As a measuring device at that time, an automatic surface tension meter “CBVP-Z” (trade name, manufactured by Kyowa Interface Science Co., Ltd.) can be used. A platinum plate having a purity of 99.9%, a size of 25 mm in width, and 10 mm in length is used.
In addition, the above-mentioned “liquid having a surface tension of 50 mN / m” is a polyoxyethylene sorbitan monolaurate (trade name, manufactured by Kao Corporation), which is a nonionic surfactant in deionized water, using the measurement method described above. The solution was adjusted to 50 ± 1 mN / m with the addition of Leool Super TW-L120).

(Measurement method of surface tension (γ _o ) of liquid film cleaving agent)
Similar to the measurement of the surface tension (γ _w ) of the liquid film, it can be measured using the same apparatus by the plate method in an environmental region at a temperature of 25 ° C. and a relative humidity (RH) of 65%. In this measurement, as described above, when the obtained liquid film cleaving agent is solid, the liquid film cleaving agent is heated to the melting point of the liquid film cleaving agent + 5 ° C. to cause a phase transition to the liquid, and the measurement is performed with the temperature condition.

(Measurement method of interfacial tension (γ _wo ) of liquid film cleaving agent with liquid film)
It can be measured by the pendant drop method in an environmental region where the temperature is 25 ° C. and the relative humidity (RH) is 65%. As the measuring device at that time, an automatic interface viscoelasticity measuring device (manufactured by TECRIS-ITCONCEPT, trade name THE TRACKER, KRUSS, trade name DSA25S) can be used. In the pendant drop method, when a drop is formed, adsorption of a nonionic surfactant contained in a liquid having a surface tension of 50 mN / m starts, and the interfacial tension decreases with time. Therefore, the interfacial tension when the drop is formed (at 0 second) is read. In this measurement, as described above, when the obtained liquid film cleaving agent is solid, the liquid film cleaving agent is heated to the melting point of the liquid film cleaving agent + 5 ° C. to cause a phase transition to the liquid, and the measurement is performed with the temperature condition. .
When measuring the interfacial tension, if the density difference between the liquid film cleaving agent and the liquid with a surface tension of 50 mN / m is very small, the viscosity is extremely high, or the interfacial tension value is below the pendant drop measurement limit, The interfacial tension measurement by the pendant drop method may be difficult. In that case, the measurement can be performed by measuring by a spinning drop method in an environment region at a temperature of 25 ° C. and a relative humidity (RH) of 65%. As a measuring device at that time, a spinning drop interfacial tensiometer (manufactured by KRUSS, trade name SITE100) can be used. Also for this measurement, the interfacial tension when the drop shape is stabilized is read, and when the obtained liquid film cleaving agent is solid, it is heated to the melting point of the liquid film cleaving agent + 5 ° C. The phase is changed and the measurement is carried out with the temperature condition.
Note that when the interfacial tension can be measured by both measuring apparatuses, a smaller interfacial tension value is adopted as the measurement result.

  The liquid film cleaving agent of the first embodiment has the above expansion coefficient and water solubility, spreads on the surface of the liquid film without dissolving, and pushes the liquid film layer from the vicinity of the center of the liquid film. Can do. As a result, the liquid film is destabilized and cleaved.

  Here, the liquid film cleaving effect of the liquid film cleaving agent in the absorbent body according to the first embodiment is specifically described with reference to FIGS. 3 and 4, taking as an example the case where the liquid film cleaving agent is disposed on the nonwoven fabric. Explained.

  FIG. 3 shows a state in which a liquid film 8 is formed in the gap between the fibers 7 constituting the nonwoven fabric. In FIG. 4, the liquid film 8 is cleaved by the liquid film cleaving agent 9. The process is shown. As shown in FIG. 3, in a narrow region between fibers, a highly viscous excretory fluid such as menstrual blood tends to stretch the liquid film 8. On the other hand, the liquid film cleaving agent 9 destabilizes and breaks the liquid film 8 as follows, inhibits the formation of the liquid film 8, and promotes drainage from the nonwoven fabric. First, as shown in FIGS. 4 (A1) and (B1), the liquid film cleaving agent 9 that the non-woven fiber 7 had, that is, adhered to the surface of the fiber 7, is applied to the liquid film 8 from above the fiber 7. Further, the surface of the liquid film 8 is moved while maintaining the interface with the liquid film 8. Next, as shown in FIGS. 4 (A2) and (B2), the liquid film cleaving agent 9 pushes away a part of the liquid film 8 and intrudes into the inside of the liquid film 8 in the thickness direction, as shown in FIG. 4 (A3). And as shown in (B3), the liquid film 8 is gradually changed to a non-uniform and thin film. As a result, as shown in FIGS. 4A4 and 4B4, the liquid film 8 is opened and cleaved so as to be repelled. The liquid such as menstrual blood forming the cleaved liquid film 8 becomes droplets and easily passes between the fibers of the nonwoven fabric, so that the liquid residue is reduced.

  Such a cleaving action of the liquid film cleaving agent on the liquid film is not limited to the case of the liquid film between the fibers intersecting each other as shown in FIG. . That is, the liquid film cleaving agent can move on the liquid film clinging to the fiber surface and push away a part of the liquid film to cleave the liquid film. In that case, the liquid film cleaving agent does not move the liquid film on the fiber surface by the hydrophobic action even if the liquid film cleaving agent itself does not migrate to the liquid film on the fiber surface. It can be cleaved to inhibit formation.

In the first embodiment, the liquid film cleaving agent preferably further has an interface tension of 20 mN / m or less with respect to a liquid having a surface tension of 50 mN / m. That is, it is preferable that the “interfacial tension (γ _wo ) of the liquid film cleaving agent with respect to the liquid film”, which is one variable for determining the value of the expansion coefficient (S) in the formula (1), is 20 mN / m or less. By keeping the “interfacial tension of the liquid film cleaving agent with the liquid film (γ _wo )” low, the expansion coefficient of the liquid film cleaving agent is improved, and the liquid film cleaving agent easily moves from the fiber surface to the vicinity of the liquid film center. Thus, the above-described action becomes clearer. From this viewpoint, the “interfacial tension with respect to a liquid having a surface tension of 50 mN / m” of the liquid film cleaving agent is more preferably 17 mN / m or less, further preferably 13 mN / m or less, still more preferably 10 mN / m or less, and 9 mN. / M or less is particularly preferable, and 1 mN / m or less is particularly preferable. On the other hand, the lower limit is not particularly limited, and may be larger than 0 mN / m from the viewpoint of insolubility in the liquid film. Note that when the interfacial tension is 0 mN / m, that is, when the liquid film cleaving agent is dissolved in the liquid film, the interface between the liquid film and the liquid film cleaving agent cannot be formed. No expansion of the agent occurs.
As can be seen from the equation (1), the expansion coefficient changes depending on the surface tension of the target liquid. For example, when the surface tension of the target liquid is 72 mN / m, the surface tension of the liquid film cleaving agent is 21 mN / m, and the interfacial tension is 0.2 mN / m, the expansion coefficient is 50.8 mN / m.
When the surface tension of the target liquid is 30 mN / m, the surface tension of the liquid film cleaving agent is 21 mN / m, and the interfacial tension is 0.2 mN / m, the expansion coefficient is 8.8 mN / m.
In any case, the larger the expansion coefficient, the greater the liquid film cleavage effect.
In this specification, the numerical value at the surface tension of 50 mN / m is defined. However, even if the surface tension is different, there is no change in the magnitude relationship between the numerical values of the expansion coefficients of the substances. Even if it changes with the physical condition of each day, the agent with a larger expansion coefficient shows an excellent liquid film cleavage effect.

  In the first embodiment, the surface tension of the liquid film cleaving agent is preferably 32 mN / m or less, more preferably 30 mN / m or less, still more preferably 25 mN / m or less, and particularly preferably 22 mN / m or less. Moreover, the said surface tension is so good that it is small, and the minimum is not specifically limited. From the viewpoint of durability of the liquid film cleaving agent, 1 mN / m or more is practical.

  Next, the liquid film cleaving agent of 2nd Embodiment is demonstrated.

  The liquid film cleaving agent of the second embodiment is compound C2. Compound C2 has an expansion coefficient greater than 0 mN / m for a liquid with a surface tension of 50 mN / m, that is, a positive value, has a water solubility of 0 g or more and 0.025 g or less, and a liquid with a surface tension of 50 mN / m. It is a compound having an interfacial tension of 20 mN / m or less. When the “interfacial tension with respect to a liquid having a surface tension of 50 mN / m” is 20 mN / m or less, it means that the diffusibility of the liquid film cleaving agent on the liquid film is increased as described above. Thereby, even when the expansion coefficient is relatively small such that the “expansion coefficient for a liquid having a surface tension of 50 mN / m” is less than 15 mN / m, many liquid film cleaving agents are removed from the fiber surface due to high diffusibility. By dispersing the liquid film in the liquid film and pushing the liquid film at many positions, the same liquid film cleavage effect as in the case of the first embodiment can be obtained.

  The “extension coefficient for a liquid having a surface tension of 50 mN / m”, “water solubility” and “interfacial tension for a liquid having a surface tension of 50 mN / m” relating to the liquid film cleaving agent are defined in the first embodiment. The measuring method is also the same.

In the second embodiment, from the viewpoint of making the action of the liquid film cleaving agent more effective, the “interface tension with respect to a liquid having a surface tension of 50 mN / m” is preferably 17 mN / m or less, and 13 mN / m. The following is more preferable, 10 mN / m or less is further preferable, 9 mN / m or less is still more preferable, and 1 mN / m or less is particularly preferable. The lower limit is not particularly limited as in the first embodiment, and is practically larger than 0 mN / m from the viewpoint of not dissolving in a liquid film (a liquid having a surface tension of 50 mN / m). .
Further, the “expansion coefficient for a liquid having a surface tension of 50 mN / m” is preferably 9 mN / m or more, more preferably 10 mN / m or more, from the viewpoint of making the action of the liquid film cleaving agent more effective. More preferably, it is 15 mN / m or more. Although the upper limit is not particularly limited, 50 mN / m or less is substantial from the viewpoint that the surface tension of the liquid forming the liquid film becomes the upper limit from the formula (1).
Further, more preferable ranges of the surface tension and the water solubility of the liquid film cleaving agent are the same as those in the first embodiment.

  In the liquid film cleaving agent of the first embodiment and the second embodiment, when the liquid film cleaving agent is contained in a nonwoven fabric containing synthetic resin fibers or paper or absorbent core containing cellulose fibers, the phosphoric acid ester type It is preferable to contain an anionic surfactant. This increases the hydrophilicity of the fiber surface and improves the wettability, thereby increasing the area where the liquid film and the liquid film cleaving agent are in contact with each other. Therefore, when a surfactant having a phosphate group is used in combination, the affinity for the phospholipid contained in the blood is good due to the compatibility of the active agent. This facilitates the transition to, and further promotes the cleavage of the liquid film. The content ratio of the liquid film cleaving agent and the phosphate ester type anionic surfactant is a mass ratio, and the former: the latter is preferably 1: 1 to 19: 1, more preferably 2: 1 to 15: 1. 3: 1 to 10: 1 are more preferable. In particular, the content ratio is a mass ratio, and the former: the latter is preferably 5: 1 to 19: 1, more preferably 8: 1 to 16: 1, and even more preferably 11: 1 to 13: 1.

  The phosphate ester type anionic surfactant is not particularly limited. For example, specific examples thereof include alkyl ether phosphates, dialkyl phosphates, and alkyl phosphates. Among these, alkyl phosphates are preferable from the viewpoint of enhancing the affinity between the liquid film cleaving agent containing the same and the liquid film and at the same time imparting the workability of the nonwoven fabric.

  Next, specific examples of the liquid film cleaving agent of the first embodiment and the second embodiment will be described. Since these are in the specific numerical range described above, they have the property of not being soluble in water or being sparingly soluble in water, and exhibit a liquid film cleavage effect. On the other hand, surfactants used as conventional fiber treatment agents are practically water-soluble when used by dissolving in water, and are not the liquid film cleaving agent of the present invention. .

  The liquid film cleaving agent of the first embodiment and the second embodiment is preferably a compound having a weight average molecular weight of 500 or more. This weight average molecular weight greatly affects the viscosity of the liquid film cleaving agent. By keeping the viscosity high, it is difficult for the liquid to flow down when passing through the constituent material, and the sustainability of the liquid film cleavage effect can be maintained. From the viewpoint of achieving a viscosity that sufficiently maintains the liquid film cleavage effect, the weight average molecular weight of the liquid film cleavage agent is more preferably 1000 or more, further preferably 1500 or more, and particularly preferably 2000 or more. On the other hand, from the viewpoint of the transition of the liquid film cleaving agent from the constituent material provided with the liquid film cleaving agent to the liquid film, that is, the viscosity for maintaining diffusibility, 50000 or less is preferable, 20000 or less is more preferable, and 10,000 or less is preferable. Further preferred.

  The liquid film cleaving agent of the first embodiment is preferably a compound having at least one structure selected from the group consisting of structures X, XY, and Y-XY. The structures X and Y here are specifically the following structures. In the following structure, “C” represents a carbon atom, and “<”, “>”, and “−” each represents a bond.

Structure X _{is,> C (A) -,} - C (A) 2 -, - C (A) (B) -,> C (A) -C (R 1) <,> C (R 1) -, -C (R ¹ ) (R ² )-, -C (R ¹ ) ₂ -,> C <, and -Si (R ¹ ) ₂ O-, -Si (R ¹ ) (R ² ) O- These basic structures are repeated, or represent a siloxane chain having a structure in which two or more kinds are combined, or a mixed chain thereof. At the end of the structure X, a hydrogen atom, or -C (A) ₃ , -C (A) ₂ B, -C (A) (B) _2, -C (A) ₂ -C (R ¹ ) ₃ , -C (R ¹ ) ₂ A, -C (R ¹ ) ₃ , and -OSi (R ¹ ) ₃ , -OSi (R ¹ ) ₂ (R ² ), -Si (R ¹ ) ₃ , -Si (R ¹ ) _{2 It} has at least one group selected from the group consisting of (R ² ).

R ¹ and R ² are each independently a hydrogen atom, an alkyl group (preferably having 1 to 20 carbon atoms, for example, a methyl group, an ethyl group or a propyl group is preferred), an alkoxy group (having 1 to 20 carbon atoms). Preferred examples include various substituents such as a methoxy group and an ethoxy group, an aryl group (preferably having 6 to 20 carbon atoms, eg, a phenyl group), and a halogen atom (eg, a fluorine atom are preferred). Show. A and B each independently represent a substituent containing an oxygen atom or a nitrogen atom, such as a hydroxyl group, a carboxylic acid group, an amino group, an amide group, an imino group, or a phenol group. When there are a plurality of R ¹ , R ² , A, and B in the structure X, they may be the same as or different from each other. Moreover, although the continuous bond between C (carbon atom) and Si is usually a single bond, it may contain a double bond or a triple bond, and the bond between C and Si includes an ether group (- O-), amide group (—CONR ^A —: ^RA is a hydrogen atom or a monovalent group), ester group (—COO—), carbonyl group (—CO—), carbonate group (—OCOO—), etc. Groups may be included. The number of one C and Si bonded to other C or Si is 1 to 4, and a long-chain silicone chain (siloxane chain) or mixed chain is branched or has a radial structure. You may be doing it.

The structure Y represents a hydrophilic group having hydrophilicity including an atom selected from a hydrogen atom, a carbon atom, an oxygen atom, a nitrogen atom, a phosphorus atom, and a sulfur atom. For example, a hydroxyl group, a carboxylic acid group, an amino group, an amide group, an imino group, a phenol group, a polyoxyalkylene group (the oxyalkylene group preferably has 1 to 4 carbon atoms. For example, a polyoxyethylene (POE) group, a polyoxy Propylene (POP) group is preferred), sulfonic acid group, sulfuric acid group, phosphoric acid group, sulfobetaine group, carbobetaine group, phosphobetaine group (these betaine groups are obtained by removing one hydrogen atom from each betaine compound). And a hydrophilic group such as a quaternary ammonium group alone or a combination thereof. In addition to these, the groups and functional groups mentioned in M ¹ described later are also included. In addition, when there are a plurality of Ys as in the structure Y-XY, the plurality of Ys may be the same as or different from each other.

In structures XY and Y-XY, Y is bound to X or a terminal group of X. When Y is bonded to the terminal group of X, the terminal group of X is bonded to Y by removing, for example, the same number of hydrogen atoms as the number of bonds to Y.
In this structure, the hydrophilic groups Y, A, and B can be selected from the groups specifically described to satisfy the aforementioned expansion coefficient, water solubility, and interfacial tension. Thus, the target liquid film cleavage effect is expressed.

  The liquid film cleaving agent of the first embodiment is preferably a compound in which the structure X is a siloxane structure. Furthermore, in the liquid film cleaving agent of the first embodiment, as specific examples of the structures X, XY, and Y-XY, the structures represented by the following formulas (1) to (11) are arbitrarily selected. Compounds composed of combined siloxane chains are preferred. Furthermore, it is preferable from the viewpoint of the liquid film cleavage effect that this compound has a weight average molecular weight in the above-mentioned range.

In the formulas (1) to (11), M ¹ , L ¹ , R ²¹ , and R ²² represent the following monovalent or polyvalent (divalent or higher) groups. R ²³ and R ²⁴ represent the following monovalent or polyvalent (divalent or higher) group or a single bond.
M ¹ is a group having a polyoxyethylene group, a polyoxypropylene group, a polyoxybutylene group, or a polyoxyalkylene group obtained by combining them, an erythritol group, a xylitol group, a sorbitol group, a glycerin group or an ethylene glycol group. Hydrophilic groups having a plurality of hydroxyl groups (hydrophilic groups formed by removing one hydrogen atom from the compound having a plurality of hydroxyl groups such as erythritol), hydroxyl groups, carboxylic acid groups, mercapto groups, alkoxy groups (preferably having 1 to 20 carbon atoms) For example, a methoxy group is preferred), amino group, amide group, imino group, phenol group, sulfonic acid group, quaternary ammonium group, sulfobetaine group, hydroxysulfobetaine group, phosphobetaine group, imidazolium betaine group, carbobetaine. Group, epoxy group, carbi It represents a functional group combining a nor group, a (meth) acryl group, or a combination thereof. When M ¹ is a polyvalent group, M ¹ represents a group obtained by removing one or more hydrogen atoms from each of the groups or functional groups.
L ¹ is an ether group, an amino group (an amino group that can be taken as L ¹ is represented by> NR ^C (R ^C is a hydrogen atom or a monovalent group)), an amide group, an ester group, a carbonyl group, The bonding group of a carbonate group is shown.
R ²¹ , R ²² , R ²³ , and R ²⁴ are each independently an alkyl group (preferably having 1 to 20 carbon atoms. For example, methyl group, ethyl group, propyl group, isopropyl group, butyl group, pentyl group, hexyl group) Group, heptyl group, 2-ethylhexyl group, nonyl group and decyl group are preferable), alkoxy group (preferably having 1 to 20 carbon atoms, for example, methoxy group and ethoxy group are preferable), aryl group (having 6 to 6 carbon atoms). 20 is preferable, for example, a phenyl group is preferable), a fluoroalkyl group, an aralkyl group, a hydrocarbon group obtained by combining them, or a halogen atom (for example, a fluorine atom is preferable). In addition, when R < ²² > and R < ²³ > is a polyvalent group, the polyvalent hydrocarbon group remove | excluding one or more hydrogen atom or fluorine atom from the said hydrocarbon group is shown.
In addition, when R ²² or R ²³ is bonded to M ¹ , examples of the group that can be taken as R ²² or R ²³ include an imino group that can be taken as R ³² in addition to each of the groups, the hydrocarbon group, or the halogen atom. It is done.

  The liquid film cleaving agent of the first embodiment has a structure represented by any one of the formulas (1), (2), (5) and (10) as the structure X, and the terminal of X Or a group consisting of the terminal of X and Y is preferably a compound having a structure represented by any one of the above formulas other than these formulas. Furthermore, X or a group consisting of X terminal and Y has a structure represented by any one of the above formulas (2), (4), (5), (6), (8) and (9). A compound composed of a siloxane chain having at least one is preferable.

Specific examples of the compound, that is, the liquid film cleaving agent according to the first embodiment include organic surfactant-modified silicone (polysiloxane) which is a silicone surfactant. For example, examples of the organic modified silicone modified with a reactive organic group include amino modified, epoxy modified, carboxy modified, diol modified, carbinol modified, (meth) acryl modified, mercapto modified, and phenol modified. Organic modified silicones modified with non-reactive organic groups include polyether modified (including polyoxyalkylene modified), methylstyryl modified, long chain alkyl modified, higher fatty acid ester modified, higher alkoxy modified, higher fatty acid. Examples include modified and fluorine-modified ones. Depending on the type of organic modification, for example, by appropriately changing the molecular weight of the silicone chain, the modification rate, the number of moles of the modifying group, and the like, the expansion coefficient exhibiting the liquid film cleavage action can be obtained. Here, the “long chain” means one having 12 or more carbon atoms, preferably 12 to 20 carbon atoms. Further, “higher” means one having 6 or more carbon atoms, preferably 6 to 20 carbon atoms.
Among them, a modified silicone having a structure in which a liquid film cleaving agent that is a modified silicone has at least one oxygen atom in a modified group, such as polyoxyalkylene-modified silicone, epoxy-modified silicone, carbinol-modified silicone, and diol-modified silicone is preferable. In particular, polyoxyalkylene-modified silicone is preferred. Since the polyoxyalkylene-modified silicone has a polysiloxane chain, when the liquid film cleaving agent is contained in the fiber of the synthetic resin, the polyoxyalkylene-modified silicone hardly penetrates into the fiber and easily remains on the surface. In addition, the addition of a hydrophilic polyoxyalkylene chain is preferable because the affinity with water is increased and the interfacial tension is low, so that the movement on the surface of the liquid film is likely to occur. Therefore, it is preferable that the movement on the surface of the liquid film described above easily occurs. In addition, even if the polyoxyalkylene-modified silicone is subjected to hot-melt processing such as embossing, it tends to remain on the fiber surface at that portion, and the liquid film cleavage effect is difficult to reduce. In particular, the liquid film cleavage effect is sufficiently exhibited in the embossed portion where the liquid tends to accumulate, which is preferable.

  Examples of the polyoxyalkylene-modified silicone that can be used as the liquid film cleaving agent of the first embodiment include those represented by the following formulas [I] to [IV]. Furthermore, the polyoxyalkylene-modified silicone preferably has a weight average molecular weight in the range described above from the viewpoint of the liquid film cleavage effect.

In the formulas [I] to [IV], R ³¹ is an alkyl group (having preferably 1 to 20 carbon atoms. For example, methyl group, ethyl group, propyl group, isopropyl group, butyl group, pentyl group, hexyl group, heptyl group) Group, a 2-ethyl-hexyl group, a nonyl group and a decyl group are preferred). R ³² represents a single bond or an alkylene group (preferably having 1 to 20 carbon atoms, for example, a methylene group, an ethylene group, a propylene group or a butylene group is preferred), and preferably represents the alkylene group. The plurality of R ³¹ and the plurality of R ³² may be the same as or different from each other. M ¹¹ represents a group having a polyoxyalkylene group, and a polyoxyalkylene group is preferable. Examples of the polyoxyalkylene group include a polyoxyethylene group, a polyoxypropylene group, a polyoxybutylene group, or a copolymer of these constituent monomers. m and n are each independently an integer of 1 or more. In addition, the code | symbol of these repeating units is determined separately in each formula [I]-[IV], and does not necessarily show the same integer and may differ.

In addition, the polyoxyalkylene-modified silicone that can be used as the liquid film cleaving agent of the first embodiment may have one or both modified groups of polyoxyethylene-modified and polyoxypropylene-modified. Further, in order to have a low interfacial tension that is insoluble in water, it is desirable to have a methyl group in the alkyl group R ³¹ of the silicone chain. Although it does not restrict | limit especially as what has this modification group and a silicone chain | strand, For example, there exists a thing of the paragraphs [0006] and [0012] of Unexamined-Japanese-Patent No. 2002-161474. More specifically, polyoxyethylene (POE) polyoxypropylene (POP) modified silicone, polyoxyethylene (POE) modified silicone, polyoxypropylene (POP) modified silicone and the like can be mentioned. Examples of the POE-modified silicone include POE (3) -modified dimethyl silicone added with 3 moles of POE. Examples of the POP-modified silicone include POP (10) -modified dimethyl silicone, POP (12) -modified dimethyl silicone, POP (24) -modified dimethyl silicone to which POP is added at 10 mol, 12 mol, or 24 mol.

  In the polyoxyalkylene-modified silicone, the expansion coefficient and water solubility of the liquid film cleaving agent of the first embodiment described above are, for example, the number of added polyoxyalkylene groups (polyoxyalkylene groups relative to 1 mol of polyoxyalkylene-modified silicones). The number of bonds of the oxyalkylene group forming), the following modification rate, and the like can be set within a predetermined range. In this liquid film cleaving agent, the surface tension and the interfacial tension can also be set within predetermined ranges in the same manner.

  From the above viewpoint, the polyoxyalkylene-modified silicone that can be used as the liquid film cleaving agent of the first embodiment preferably has a polyoxyalkylene group addition mole number of 1 or more. By reducing the interfacial tension, the expansion coefficient is increased, and from the viewpoint of enhancing the liquid film cleavage effect, the number of added moles is more preferably 3 or more, and further preferably 5 or more. On the other hand, from the viewpoint of preventing hydrophilicity and excessively high water solubility, the number of added moles is preferably 30 or less, more preferably 20 or less, and even more preferably 10 or less.

  The modification rate of the modified silicone is preferably 5% or more, more preferably 10% or more, and still more preferably 20% or more in order to ensure the necessary hydrophilicity. Moreover, in order not to dissolve in water, 95% or less is preferable, 70% or less is more preferable, and 40% or less is still more preferable. The modification rate of the modified silicone is the ratio of the number of repeating units of the modified siloxane bonding portion to the total number of repeating units of the siloxane bonding portion in one molecule of the modified silicone. For example, (n / m + n) × 100% in the formulas [I] and [IV], (2 / m) × 100% in the formula [II], and (1 / m) in the formula [III]. × 100%.

  In addition, in the polyoxyalkylene-modified silicone, the above-mentioned expansion coefficient and water solubility, in addition to the above-described ones, respectively, the modifying group is a water-soluble polyoxyethylene group, a water-insoluble polyoxypropylene group and a polyoxybutylene group. By changing the molecular weight of the water-insoluble silicone chain, introducing an amino group, an epoxy group, a carboxy group, a hydroxyl group, a carbinol group, etc. in addition to the polyoxyalkylene modification as the modifying group, etc. Can be set within the range.

  When the polyalkylene-modified silicone used as the liquid film cleaving agent of the first embodiment is contained in the nonwoven fabric, it is contained as 0.02% by mass or more and 8% by mass or less as a content ratio to the fiber mass (Oil Per Unit). Is preferred. The content (OPU) of the polyalkylene-modified silicone is more preferably 5% by mass or less, further preferably 1% by mass or less, and particularly preferably 0.4% by mass or less. By doing so, the tactile sensation of the nonwoven fabric becomes preferable. Further, from the viewpoint of sufficiently exhibiting the liquid film cleavage effect by the polyalkylene-modified silicone, the content ratio (OPU) is more preferably 0.0005% by mass or more, and further preferably 0.0015% by mass or more.

In addition, the polyalkylene-modified silicone contained in sanitary products is not limited to non-woven fabric, and the content thereof is preferably 0.00001 g / m ² or more from the viewpoint of reliably acting on the liquid film, and 0.0001 g / m ^2. The above is more preferable, and 0.0003 g / m ² or more is more preferable. Also, polyalkylene-modified silicone contained in the catamenial, from the viewpoint of ensuring the transparency of the liquid, its content is preferably 10 g / ^{m 2} or less, more preferably 7 g / ^{m 2} or less, 5 g / ^{m 2} The following is more preferable. Specifically, the content of polyalkylene-modified silicone as EkimakuHiraki cleaving agent of the first embodiment contained in the catamenial preferably 0.00001 / ^{m 2} or more 10 g / ^{m 2} or less, 0.0001 g / m ² or more and 7 g / m ² or less are more preferable, and 0.0003 g / m ² or more and 5 g / m ² or less are still more preferable.

  The liquid film cleaving agent in the second embodiment is preferably a compound having at least one structure selected from the group consisting of the following structures Z, ZY, and YZY, as will be described later. The structures Z and Y here are specifically the following structures. In the following structure, “C” represents a carbon atom, and “<”, “>”, and “−” each represents a bond.

Structure Z _{is,> C (A) -,} - C (A) 2 -, - C (A) (B) -,> C (A) -C (R 3) <,> C (R 3) -, A hydrocarbon chain having a structure in which one of the basic structures of -C (R ³ ) (R ⁴ )-, -C (R ³ ) ₂ -,> C <is repeated or a combination of two or more thereof is used. Represent. At the terminal of the structure Z, a hydrogen atom, or -C (A) ₃ , -C (A) ₂ B, -C (A) (B) _2, -C (A) ₂ -C (R ³ ) ₃ , —C (R ³ ) ₂ A, and at least one group selected from the group consisting of —C (R ³ ) ₃ .

R ³ and R ⁴ are each independently a hydrogen atom or an alkyl group (preferably having 1 to 20 carbon atoms. For example, methyl group, ethyl group, propyl group, isopropyl group, butyl group, pentyl group, hexyl group, heptyl Group, a 2-ethyl-hexyl group, a nonyl group and a decyl group are preferred), an alkoxy group (preferably having 1 to 20 carbon atoms, for example, a methoxy group and an ethoxy group are preferred), and an aryl group (having 6 to 20 carbon atoms). Preferred examples thereof include a phenyl group.), A fluoroalkyl group, an aralkyl group, a hydrocarbon group obtained by combining them, or various substituents such as a fluorine atom. A and B each independently represent a substituent containing an oxygen atom or a nitrogen atom, such as a hydroxyl group, a carboxylic acid group, an amino group, an amide group, an imino group, or a phenol group. When there are a plurality of R ³ , R ⁴ , A, and B in the structure X, they may be the same as or different from each other. In addition, the bond between successive C (carbon atoms) is usually a single bond, but may include a double bond or a triple bond, and the bond between C includes an ether group, an amide group, an ester group. A linking group such as a carbonyl group or a carbonate group may be contained. The number of one C bonded to the other C is 1 to 4, and a long hydrocarbon chain may be branched or may have a radial structure. .

  The structure Y represents a hydrophilic group having hydrophilicity including an atom selected from a hydrogen atom, a carbon atom, an oxygen atom, a nitrogen atom, a phosphorus atom, and a sulfur atom. For example, a hydroxyl group, a carboxylic acid group, an amino group, an amide group, an imino group, a phenol group; or a polyoxyalkylene group (the oxyalkylene group preferably has 1 to 4 carbon atoms. For example, a polyoxyethylene group or a polyoxypropylene Group, a polyoxybutylene group, or a polyoxyalkylene group in combination thereof)); or a hydrophilic group having a plurality of hydroxyl groups such as erythritol group, xylitol group, sorbitol group, glycerin group, ethylene glycol group; A hydrophilic group such as a sulfonic acid group, a sulfuric acid group, a phosphoric acid group, a sulfobetaine group, a carbobetaine group, a phosphobetaine group, a quaternary ammonium group, an imidazolium betaine group, an epoxy group, a carbinol group, or a methacryl group; A hydrophilic group consisting of the combination . When Y is plural, they may be the same or different.

In the structures ZY and YZY, Y is bonded to Z or a terminal group of Z. When Y is bonded to the terminal group of Z, the terminal group of Z is bonded to Y by removing, for example, the same number of hydrogen atoms as the number of bonds to Y.
In this structure, the hydrophilic groups Y, A, and B can be selected from the groups specifically described to satisfy the aforementioned expansion coefficient, water solubility, and interfacial tension. Thus, the target liquid film cleavage effect is expressed.

  The liquid film cleaving agent of 2nd Embodiment combined arbitrarily the structure represented by following (12)-(25) Formula as a specific example of said structure Z, ZY, YZY. Compounds are preferred. Furthermore, it is preferable from the viewpoint of the liquid film cleavage effect that this compound has a weight average molecular weight in the above-mentioned range.

In the formulas (12) to (25), M ² , L ² , R ⁴¹ , R ⁴² , and R ⁴³ represent the following monovalent or polyvalent groups (divalent or higher).
M ² is a group having a polyoxyethylene group, a polyoxypropylene group, a polyoxybutylene group, or a polyoxyalkylene group in combination thereof, an erythritol group, a xylitol group, a sorbitol group, a glycerin group or an ethylene glycol group. Hydrophilic groups having a plurality of hydroxyl groups, hydroxyl groups, carboxylic acid groups, mercapto groups, alkoxy groups (preferably having 1 to 20 carbon atoms, for example, methoxy groups are preferred), amino groups, amide groups, imino groups, phenol groups, sulfonic acids Group, quaternary ammonium group, sulfobetaine group, hydroxysulfobetaine group, phosphobetaine group, imidazolium betaine group, carbobetaine group, epoxy group, carbinol group, (meth) acryl group, or a functional group combining them. Show.
L ² is an ether group, an amino group, an amide group, an ester group, a carbonyl group, a carbonate group, or a polyoxyethylene group, a polyoxypropylene group, a polyoxybutylene group, or a polyoxyalkylene group obtained by combining them. The bonding group of is shown.
R ⁴¹ , R ⁴² and R ⁴³ are each independently a hydrogen atom or an alkyl group (preferably having 1 to 20 carbon atoms. For example, a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, a pentyl group, a hexyl group) , A heptyl group, a 2-ethylhexyl group, a nonyl group, and a decyl group are preferable, an alkoxy group (preferably having 1 to 20 carbon atoms, for example, a methoxy group and an ethoxy group are preferable), and an aryl group (having 6 to 20 carbon atoms). For example, a phenyl group is preferable), a fluoroalkyl group, an aralkyl group, a hydrocarbon group obtained by combining them, or various substituents composed of a halogen atom (for example, a fluorine atom is preferable).
If R ⁴² is a polyvalent group, R ^42, said from the substituent, further showing a group obtained by removing one or more hydrogen atoms.
In addition, another structure may be arbitrarily connected to the tip of the bond described in each structure, or a hydrogen atom may be introduced.

  Furthermore, specific examples of the compound, that is, the liquid film cleaving agent of the second embodiment include firstly a polyether compound and a nonionic surfactant, and secondly, a hydrocarbon compound having 5 or more carbon atoms. It is not limited to.

  Specifically, the polyether compound and the nonionic surfactant, which are the first specific example of the liquid film cleaving agent of the second embodiment, are polyoxyalkylene alkyl (POA) represented by any one of the following formula [V]. ) Ether, polyoxyalkylene glycol having a weight average molecular weight of 1000 or more represented by the following formula [VI], steareth, behenez, PPG myristyl ether, PPG stearyl ether, PPG behenyl ether, and the like. The polyoxyalkylene alkyl ether is preferably lauryl ether to which POP is added in an amount of 3 mol to 24 mol, preferably 5 mol. As the polyether compound, polypropylene glycol having a weight average molecular weight of 1000 to 10,000, preferably 3000, to which polypropylene glycol is added in an amount of 17 to 180 mol, preferably about 50 mol, is preferable. In addition, the measurement of the said weight average molecular weight can be performed with the measuring method mentioned later.

  When the polyether compound and the nonionic surfactant that can be used as the liquid film cleaving agent of the second embodiment are contained in the nonwoven fabric, the content ratio to the fiber mass (Oil Per Unit) is 0.1% by mass or more and 8% by mass. It is preferable to contain below. The content ratio (OPU) of the polyether compound or nonionic surfactant is more preferably 5% by mass or less, further preferably 1.0% by mass or less, and particularly preferably 0.4% by mass or less. By doing so, the tactile sensation of the nonwoven fabric becomes preferable. In addition, from the viewpoint of sufficiently exhibiting the liquid film cleavage effect by the polyether compound or the nonionic surfactant, the content ratio (OPU) is more preferably 0.0005% by mass or more, and further 0.0015% by mass or more. preferable.

Moreover, the content of the polyether compound and the nonionic surfactant contained in the sanitary product is not limited to the nonwoven fabric, and is preferably 0.00001 g / m ² or more from the viewpoint of reliably acting on the liquid film. 0001g / ^{m 2} or more preferably, 0.0003 g / ^{m 2} or more is more preferable. Further, the polyether compound and nonionic surfactant contained in the catamenial, from the viewpoint of ensuring the transparency of the liquid, its content is preferably 10 g / m ² or less, more preferably 7 g / m ² or less, 5 g / m ² or less is more preferable. Specifically, the content of the polyether compound and nonionic surfactant as EkimakuHiraki cleaving agent of the second embodiment is contained in the catamenial preferably 0.00001 / ^{m 2} or more 10 g / ^{m 2} or less, 0.0001 g / m ² or more and 7 g / m ² or less is more preferable, and 0.0003 g / m ² or more and 5 g / m ² or less is still more preferable.

In the formula [V], L ²¹ represents an ether group, an amino group, an amide group, an ester group, a carbonyl group, a carbonate group, a polyoxyethylene group, a polyoxypropylene group, a polyoxybutylene group, or a combination thereof. A bonding group such as an oxyalkylene group is shown. In the formulas [V] and [VI], R ⁵¹ represents a hydrogen atom, a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, a 2-ethylhexyl group, a nonyl group, Various substituents consisting of a decyl group, a methoxy group, an ethoxy group, a phenyl group, a fluoroalkyl group, an aralkyl group, a hydrocarbon group combining them, or a fluorine atom are shown. A, b, m and n are each independently an integer of 1 or more. Here, C _m H _n represents an alkyl group (n = 2m + 1), and C _a H _b represents an alkylene group (a = 2b). The number of carbon atoms and the number of hydrogen atoms are determined independently in each of the formulas [V] and [VI], and may not necessarily represent the same integer and may be different. Hereinafter, the same applies to m, m ′, m ″, n, n ′ and n ″ in the formulas [VII] to [XV]. In addition, “m” in — (C _a H _b O) _m — is an integer of 1 or more. The value of this repeating unit is determined independently in each of the formulas [V] and [VI], and does not necessarily indicate the same integer, and may be different.

The expansion coefficient, surface tension, and water solubility of the liquid film cleaving agent of the second embodiment described above are within a predetermined range, for example, depending on the number of moles of the polyoxyalkylene group in the polyether compound or nonionic surfactant. Can be set. From this viewpoint, the number of moles of the polyoxyalkylene group is preferably 1 or more and 70 or less. From the viewpoint of increasing the expansion coefficient and reducing the liquid film cleavage effect by lowering the interfacial tension, the number of moles is more preferably 5 or more, and even more preferably 7 or more. On the other hand, from the viewpoint of preventing the entanglement of the molecular chain from becoming too strong and reducing the diffusibility in the liquid film, the number of added moles is preferably 70 or less, more preferably 60 or less, and even more preferably 50 or less.
In addition, the expansion coefficient, surface tension, interfacial tension and water solubility described above are the same for water-soluble polyoxyethylene groups, water-insoluble polyoxypropylene groups and polyoxybutylene groups in polyether compounds and nonionic surfactants, respectively. Use in combination, change the chain length of the hydrocarbon chain, use a hydrocarbon chain having a branched chain, use a hydrocarbon chain having a double bond, benzene ring or naphthalene in the hydrocarbon chain It can be set within a predetermined range by using one having a ring or by appropriately combining the above.

  A hydrocarbon compound having 5 or more carbon atoms, which is a second specific example of the liquid film cleaving agent of the second embodiment, will be described. The number of carbon atoms of the hydrocarbon compound is preferably 100 or less, more preferably 50 or less, from the viewpoint that the liquid is more easily expanded to the liquid film surface. This hydrocarbon compound excludes polyorganosiloxane, and is not limited to a straight chain, but may be a branched chain, and the chain is not particularly limited to saturated or unsaturated. Moreover, you may have substituents, such as ester and ether, in the middle and the terminal. Among them, those which are liquid at normal temperature are preferably used alone. When the hydrocarbon compound is contained in the nonwoven fabric, it is preferably contained in an amount of 0.1% by mass or more and 5% by mass or less as a content ratio to the fiber mass (Oil Per Unit). The content ratio (OPU) of the hydrocarbon compound is preferably 1% by mass or less, more preferably 0.99% by mass or less, and still more preferably 0.4% by mass or less. By doing so, the tactile sensation of the nonwoven fabric becomes preferable. Further, from the viewpoint of sufficiently exerting the liquid film cleavage effect by the hydrocarbon compound, the content ratio (OPU) is more preferably 0.0005% by mass or more, and further preferably 0.0015% by mass or more.

In addition, the content of the hydrocarbon compound having 5 or more carbon atoms contained in the sanitary product is not limited to the nonwoven fabric, and is preferably 0.00001 g / m ² or more from the viewpoint of reliably acting on the liquid film. .0001g / ^{m 2} or more preferably, 0.0003 g / ^{m 2} or more is more preferable. Furthermore, 5 or more hydrocarbon compounds carbon atoms contained in the catamenial, from the viewpoint of not inhibiting the permeability of the liquid, its content is preferably 10 g / m ² or less, more preferably 7 g / m ² or less 5 g / m ² or less is more preferable. Specifically, the content of the second embodiment hydrocarbon compound having 5 or more carbon atoms as EkimakuHiraki cleaving agent in the form contained in the catamenial, 0.00001 / ^{m 2} or more 10 g / ^{m 2} or less is preferable 0.0001 g / m ² or more and 7 g / m ² or less is more preferable, and 0.0003 g / m ² or more and 5 g / m ² or less is still more preferable.

Hydrocarbon compounds that can be used as the liquid film cleaving agent of the second embodiment include oils or fats, such as natural oils or natural fats. Specific examples include coconut oil, camellia oil, castor oil, coconut oil, corn oil, olive oil, sunflower oil, tall oil, and mixtures thereof.
In addition, examples of the hydrocarbon compound that can be used as the liquid film cleaving agent of the second embodiment include caprylic acid, capric acid, oleic acid, lauric acid, palmitic acid, stearic acid, myristic acid, behenic acid, and mixtures thereof. Fatty acids represented by the following formula [VII]:

In the formula [VII], m and n are each independently an integer of 1 or more. _Here, C m _{H n} is a hydrocarbon group of each of the fatty acid.

  Specific examples of hydrocarbon compounds (fatty acids) that can be used as the liquid film cleaving agent of the second embodiment include linear or branched, saturated or unsaturated, substituted or unsubstituted polyhydric alcohol fatty acid esters or polyhydric alcohol fatty acids. Examples of the mixture include glycerin fatty acid ester and pentaerythritol fatty acid ester represented by the following formula [VIII-I] or [VIII-II], specifically glyceryl tricaprylate, Examples thereof include glyceryl tripalmitate and a mixture thereof. Note that a mixture of glycerin fatty acid ester and pentaerythritol fatty acid ester typically contains some mono-, di-, and triesters. Preferable examples of the glycerin fatty acid ester include glyceryl tricaprylate, a mixture of glyceryl tricapryate, and the like. Also, from the viewpoint of reducing the interfacial tension and obtaining a higher expansion coefficient, a polyhydric alcohol fatty acid ester having a polyoxyalkylene group introduced to such an extent that water insolubility can be maintained may be used.

In the formulas [VIII-I] and [VIII-II], m, m ′, m ″, n, n ′ and n ″ are each independently an integer of 1 or more. The plurality of m and the plurality of n may be the same as or different from each other. _{Here, C m H n, C m} 'H n' and _{C m ''} H _n '' are each a hydrocarbon group of each of the fatty acid.

  As a specific example of a hydrocarbon compound (fatty acid) that can be used as the liquid film cleaving agent of the second embodiment, a linear or branched, saturated or unsaturated fatty acid forms an ester with a polyol having a large number of hydroxyl groups, Examples include fatty acids or fatty acid mixtures in which some hydroxyl groups remain without being esterified, and examples thereof include any of the following formula [IX], any of the following formula [X], or the following formula [XI]. Or a partially esterified product of glycerin fatty acid ester, sorbitan fatty acid ester, or pentaerythritol fatty acid ester. Specifically, ethylene glycol monomyristate, ethylene glycol dimyristate, ethylene glycol palmitate, ethylene glycol dipalmitate, glyceryl dimyristate, glyceryl dipalmitate, glyceryl monooleate, sorbitan monooleate, sorbitan monostearate Rate, sorbitan dioleate, sorbitan tristearyl, pentaerythritol monostearate, pentaerythritol dilaurate, pentaerythritol tristearate, and mixtures thereof. Note that a mixture of partially esterified products such as glycerin fatty acid ester, sorbitan fatty acid ester, pentaerythritol fatty acid ester and the like typically contains some fully esterified compound.

In the formula [IX], m and n are each independently an integer of 1 or more. The plurality of m and the plurality of n may be the same as or different from each other. _Here, C m _{H n} is a hydrocarbon group of each of the fatty acid.

In the formula [X], R ⁵² represents a linear or branched, saturated or unsaturated hydrocarbon group (an alkyl group, an alkenyl group, an alkynyl group, or the like) having 2 to 22 carbon atoms. Specific examples include 2-ethylhexyl group, lauryl group, myristyl group, palmityl group, stearyl group, behenyl group, oleyl group, linole group and the like.

In the formula [XI], m and n are each independently an integer of 1 or more. The plurality of m and the plurality of n may be the same as or different from each other. _Here, C m _{H n} is a hydrocarbon group of each of the fatty acid.

  In addition, examples of the hydrocarbon compound that can be used as the liquid film cleaving agent of the second embodiment include sterol, phytosterol, and sterol derivatives. Specific examples include cholesterol, sitosterol, stigmasterol, ergosterol, and mixtures thereof having a sterol structure of the following formula [XII].

  Moreover, alcohol is mentioned as a hydrocarbon compound which can be used as a liquid film cleaving agent of 2nd Embodiment. Specific examples of the alcohol include lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, cetostearyl alcohol, behenyl alcohol, and mixtures thereof as represented by the following formula [XIII].

In the formula [XIII], m and n are each independently an integer of 1 or more. _Here, C m _{H n} is a hydrocarbon group of each of the alcohol.

  Specific examples of fatty acid esters that can be used as the liquid film cleaving agent of the second embodiment include isopropyl myristate, isopropyl palmitate, cetyl ethyl hexanoate, triethyl hexanoin, octyl represented by the following formula [XIV]. Examples include dodecyl myristate, ethyl hexyl palmitate, ethyl hexyl stearate, butyl stearate, myristyl myristate, stearyl stearate, cholesteryl isostearate, and mixtures thereof.

In the formula [XIV], m and n are each independently an integer of 1 or more. Here, two C _m H _n may be the same or different. C _m H _n -COO- of _C m _{H n} is a hydrocarbon group of each of the fatty acid. _C m _{H n} of -COOC _m H _n is a hydrocarbon group derived from the alcohol to form an ester.

  Moreover, wax is mentioned as a hydrocarbon compound which can be used as a liquid film cleaving agent of 2nd Embodiment. Specific examples of the wax include ceresin, paraffin, petrolatum, mineral oil, liquid isoparaffin, and the like represented by the following formula [XV].

  In the formula [XV], m and n are each independently an integer of 1 or more.

  The expansion coefficient, surface tension, water solubility, and interfacial tension of the liquid film cleaving agent of the second embodiment described above are, for example, those in the hydrocarbon compound having 5 or more carbon atoms, such as a hydrophilic polyoxyethylene group. Introducing a small amount to maintain water insolubility, introducing a polyoxypropylene group or polyoxybutylene group that is hydrophobic but capable of lowering the interfacial tension, changing the chain length of the hydrocarbon chain, carbonizing It can be set within a predetermined range by using a hydrogen chain having a branched chain, using a hydrocarbon chain having a double bond, using a hydrocarbon chain having a benzene ring or a naphthalene ring, etc. .

  The sanitary product of the present invention has a liquid film cleaving agent-containing region containing the above-mentioned liquid film cleaving agent. In the liquid film cleaving agent-containing region or other regions, If necessary, other components may be contained. In addition, the liquid film cleaving agent of the first embodiment and the liquid film cleaving agent of the second embodiment may use either one of these agents or a combination of both agents. In the latter case, Both agents may be mixed in one liquid film cleaving agent-containing region. This point is the same also about the 1st and 2nd specific example mentioned above in the liquid film cleaving agent of 2nd Embodiment.

(Basic composition of sanitary products)
As described above, in the sanitary product of the present invention, the absorbent body, the top sheet on the skin contact surface side, and the back sheet on the non-skin contact surface side of the absorber can be arranged. The back sheet can be liquid impermeable, liquid poorly permeable or water repellent. A liquid-permeable sheet called a second sheet may be disposed between the top sheet and the absorber. When the sanitary product is, for example, a sanitary napkin, the sanitary napkin generally has a vertically long shape having a longitudinal direction and a width direction perpendicular thereto. On the skin contact surface of the sanitary napkin, a pair of leak-proof cuffs extending in the longitudinal direction can be disposed on both sides in the width direction. The leak-proof cuff has a propensity to stand on the skin side of the wearer of the sanitary napkin, thereby preventing leakage of menstrual blood excreted on the skin contact surface of the sanitary napkin.

  The absorbent body preferably contains a superabsorbent polymer, but may alternatively contain an absorbent fiber material in addition to or in addition to the superabsorbent polymer. Or the absorber may be comprised only from the superabsorbent polymer. A typical example of the absorbent body is a member also called an absorbent core that is usually included in this type of sanitary product. Specifically, for example, fluff pulp made of wood pulp, hydrophilic synthetic fiber, etc. And a fiber material and a particulate superabsorbent polymer. In the absorbent core having such a configuration, the superabsorbent polymer is usually formed into an aggregate of fiber materials through the adhesive force generated in the superabsorbent polymer in a wet state or a binder such as a separately added adhesive or adhesive fiber. Is retained. The absorbent core can be a stacked fiber in which fluff pulp and a superabsorbent polymer are mixed, and the fluff pulp and the superabsorbent polymer are uniformly mixed or biased in the stacked fiber. You may use what is mixed or the basis weight of these materials partially differs.

  As the superabsorbent polymer used in the present invention, a polymer capable of absorbing and holding a liquid 20 times or more of its own weight and capable of gelling is preferable. Examples of such superabsorbent polymers include polyacrylic acid and salts thereof, and polyacrylate graft polymers such as starch, crosslinked carboxylmethylated cellulose, polymers or copolymers of acrylic acid or alkali metal acrylates. Coalescence can be mentioned. As the polyacrylic acid salt, a sodium salt can be preferably used.

  The absorber may have an absorbent core and a core wrap sheet that covers the absorbent core. The core wrap sheet may not only have a form that wraps the entire absorbent core, but may also have a form that partially covers, for example, covers only the skin contact surface side of the absorbent core. In the present invention, the absorber is a concept including an absorbent core and an optional core wrap sheet. As the core wrap sheet, crepe paper, spunbond-meltblown-spunbond (SMS) nonwoven fabric, or the like can be used.

Although a surface sheet will not be restrict | limited especially if it is a liquid-permeable sheet, For example, materials well-known in this field | areas, such as an air through nonwoven fabric, a spun bond nonwoven fabric, a spunlace nonwoven fabric, can be employ | adopted arbitrarily. These nonwoven fabrics can be formed of fibers composed of resins such as polyethylene, polypropylene, polyethylene terephthalate, and it is preferable that a hydrophilic fiber treatment agent is applied to these fibers. The top sheet may be composed of one layer, or may be composed of two or more layers. Further, the surface sheet may have a flat skin contact surface or non-skin contact surface, or may have either one or both of which have irregularities and are not flat, and the basis weight or density of the fiber. A variety of changes may be added. When the surface sheet is composed of a plurality of layers, the hemagglutinating agent and the liquid film cleaving agent may be contained in all layers or partly.
When the back sheet is made liquid permeable, the same sheet as the top sheet can be used. When making the back sheet liquid-impermeable, liquid-permeable, or water-repellent, a spunbond nonwoven fabric, an SMS nonwoven fabric, a moisture-permeable film, etc. can be used, and a laminate of the nonwoven fabric and the moisture-permeable film is used. You can also.

  5 and 6 show a sanitary napkin 10 as an embodiment of the sanitary product of the present invention. The sanitary napkin 10 has a longitudinal direction X corresponding to the front-rear direction of the user and a lateral direction Y orthogonal thereto, and the maximum length of the longitudinal direction X in the plan view as shown in FIG. Compared to that, it has a long vertical shape.

  The sanitary napkin 10 includes a liquid-permeable surface sheet 20 that forms a skin contact surface of the sanitary napkin 10, a water-repellent back sheet 30 that forms a non-skin contact surface of the sanitary napkin 10, and both sheets. And a liquid retaining absorbent body 40 interposed between 20 and 30, and these are integrated by a known joining means such as an adhesive. Each of the top sheet 20 and the back sheet 30 extends from the peripheral edge of the absorber 40, and is joined to each other by a known joining means such as an adhesive or heat seal at the end of the extension part. Is forming. The skin contact surface of the sanitary napkin 10 is formed with a leak-proof groove 60 having an annular shape in plan view, in which the topsheet 20 and the absorber 40 are integrally recessed. A pair of side sheets 70, 70 are disposed over substantially the entire length of the sanitary napkin 10 in the longitudinal direction X on both left and right side portions along the longitudinal direction X of the skin contact surface of the sanitary napkin 10. The absorbent body 40 includes a liquid-retaining absorbent core 41 and a core wrap sheet 42 that covers both the skin contact surface and the non-skin contact surface of the absorbent core 41. The absorptive core 41 is comprised including the fiber material and the particulate high absorptive polymer.

  FIG. 7 shows a surface sheet 20 provided in the sanitary napkin 10. The top sheet 20 has a concave-convex shape on the first surface 20A side which is a skin contact surface, but the second surface 20B side which is a non-skin contact surface is flat or has a concave-convex shape. The degree of unevenness is extremely smaller than the one surface 20A side. Specifically, the uneven shape on the first surface 20 </ b> A side includes a plurality of convex portions 21 and a linear concave portion 22 surrounding the convex portions 21. Each of the plurality of convex portions 21 protrudes toward the first surface 20A. The linear concave portions 22 are arranged in a lattice shape, and the first surface 20A of the topsheet 20 is partitioned into a plurality of regions by the concave portions 22 arranged in the lattice shape, and one convex portion 21 is provided in each region. Are arranged. That is, the first surface 20 </ b> A that is the skin contact surface of the topsheet 20 is arranged with a plurality of convex portions 21.

  The topsheet 20 includes heat-extensible fibers whose length is extended by heating. Examples of the heat-extensible fiber include a fiber that is stretched by changing the crystal state of the resin by heating, or a fiber that has been crimped and has an apparent length that has been crimped by heating. Is mentioned. After forming a lattice-shaped recess 22 by embossing or the like on a fiber web mainly composed of unheated heat-extensible fibers, which is a production intermediate of the topsheet 20, heat treatment such as air-through processing that blows hot air is performed. When applied, the heat-extensible fibers existing in each region partitioned by the recess 22 are elongated, and each region becomes bulkier than the recess 22. The bulky portion thus formed is the convex portion 21. Due to the manufacturing process of the surface sheet 20, the convex portion 21 has a solid structure filled with the constituent fibers, but the fiber density is a sparser and bulkier portion than the concave portion 22. On the other hand, the recess 22 has a pressure-bonded portion to which the constituent fibers of the surface sheet 20 are pressure-bonded or bonded, and the heat-extensible fiber existing in the recess 22 is heat-treated because the heat-extensible property is inhibited by pressure bonding. It is in a non-elongated state even after passing through.

  The topsheet 20 has a two-layer structure including an upper layer on the first surface 20A side and a lower layer on the second surface 20B side. The upper layer on the first surface 20 </ b> A side is a layer having a concavo-convex shape including the convex portions 21, and mainly includes heat-extensible fibers. The proportion of the heat-extensible fibers in all the constituent fibers of the upper layer is preferably 30% by mass or more, more preferably 50% by mass or more, and preferably 100% by mass or less, more preferably 80% by mass or less. is there. On the other hand, the lower layer on the second surface 20B side does not include the heat-extensible fibers or the content of the heat-extensible fibers is lower than that of the upper layer on the first surface 20A side having an uneven shape. Both layers constituting the top sheet 20 are preferably joined to each other at the pressure bonding portion of the recess 22. The topsheet 20 is not limited to a two-layer structure, and may have a single-layer structure or a multilayer structure of three or more layers.

  By adopting the topsheet 20 having such a concavo-convex shape, the contact area with the wearer's skin is suppressed, and steaming and rash are effectively prevented. Moreover, the convex part 21 which touches skin becomes bulky by the heat | fever expansion | extension of a heat | fever extensible fiber, and becomes a soft touch.

  The topsheet 20 can be manufactured, for example, by the following method. First, the linear recessed part 22 is formed with respect to the fiber web containing a heat | fever extensible fiber by heat embossing. At this time, in the recess 22, the heat-extensible fiber is fixed without being thermally stretched by pressure bonding or fusion. Next, an air through process is performed on the fiber web. As a result, the heat-extensible fibers existing in the portion other than the concave portion 22, that is, the region surrounded by the lattice-shaped concave portion 22 are stretched, and the convex portion 21 is formed by projecting the portion to the first surface 20 </ b> A side. Sheet 20 is obtained. As the constituent fibers of the topsheet 20, only heat-extensible fibers may be used, or non-heat-extensible heat-fusible fibers may be used in addition to the heat-extensible fibers. Examples of the constituent fibers of the surface sheet 20 include those described in paragraphs [0013] and [0037] to [0040] of JP-A-2005-350836, and paragraphs [0012] and [JP-A No. 2011-1277258, respectively. [0024] to [0046] can be used.

(Hemagglutinating agent-containing region and liquid film cleaving agent-containing region)
The present inventors have found that the surface whiteness of a sanitary product after use can be maintained by using a liquid film cleaving agent in combination with the sanitary product while using a hemagglutinating agent. In addition, as described later, it has been found that the amount of liquid return is significantly reduced when only a hemagglutinating agent is used and when only a liquid membrane cleaving agent is used. This phenomenon will be described taking as an example the case where the configuration of the sanitary napkin 10 is used.

  First, a sanitary napkin (hereinafter referred to as a sanitary napkin 10A) in which a hemagglutinating agent-containing region is provided in the core wrap sheet 42 located on the skin contact surface side of the absorbent core 41 and a liquid film cleaving agent-containing region is not provided. Will be described. The sanitary napkin 10A does not contain a liquid film cleaving agent and is a sanitary product outside the scope of the present invention.

When blood is excreted in the sanitary napkin 10A, blood that has reached the hemagglutinating agent-containing region of the core wrap sheet 42 starts to form erythrocyte aggregates on the spot, and is separated from plasma components. Then, the red blood cell aggregate is held on the skin contact surface side of the absorber 40 so as to be filtered through the gap in the absorber 40, and the plasma component diffuses into the absorber. The plasma component reaches the non-skin contact surface side of the absorbent body 40 and is mainly held on the non-skin contact surface side of the absorbent core 41. The liquid containing the plasma component held here tries to return to the skin contact surface side when pressure is applied to the sanitary napkin 10A, but erythrocyte aggregation present on the skin contact surface side of the absorber 40 is present. It is difficult to reach the top sheet 20 due to the blockage. Thereby, reduction of the liquid return amount is realized.
However, the sanitary napkin 10A has a room for improvement in appearance from the skin contact surface side after use because a red blood cell aggregate is formed at a position close to the top sheet 20.

  Next, a sanitary napkin (hereinafter referred to as a sanitary napkin 10B) in which a liquid film cleaving agent-containing region is provided on the topsheet 20 and no hemagglutinating agent-containing region will be described. The sanitary napkin 10B does not contain a hemagglutinating agent and is a sanitary product outside the scope of the present invention.

When blood is excreted on the sanitary napkin 10B, the blood that has reached the liquid film cleaving agent-containing region of the top sheet 20 destabilizes the liquid film by the liquid film cleaving agent pushing away a part of the liquid film layer. Due to the action, a liquid film cannot be continuously formed in the top sheet 20 and flows to the absorber 40 by its own weight. Thereby, in the absorber 40, blood, more specifically, blood that has passed through the liquid film cleaving agent-containing region flows in the plane direction while flowing from the skin contact surface side toward the non-skin contact surface side. It spreads. As a result, the blood diffusion area in the absorbent body 40 is larger on the non-skin contact surface side than on the skin contact surface side. Accordingly, the surface whiteness of the sanitary napkin 10B after use is extremely excellent due to the effect of not retaining the liquid on the topsheet 20 and the small diffusion area on the skin contact surface side of the absorber 40. become. Further, since there is no liquid film from the absorbent body 40 to the skin contact surface side of the top sheet 20, a liquid conduction path is hardly formed, and a reduction in liquid return is realized.
However, the sanitary napkin 10A containing the hemagglutinating agent returns to the skin contact surface side when pressure is applied as compared with the sanitary napkin 10B not containing the hemagglutinating agent. The blood to be blocked is blocked by the red blood cell agglomerates present on the skin contact surface side of the absorber, and it is difficult to return to the surface layer.

  In contrast to the sanitary napkins 10A and 10B containing only one of the hemagglutinating agent and the liquid film cleaving agent, the sanitary product of the present invention contains both agents. And in the sanitary product of the present invention, a hemagglutinating agent-containing region containing a hemagglutinating agent and a liquid membrane cleaving agent-containing region containing a liquid membrane cleaving agent are arranged. Both are on the skin contact surface side of the absorber or the absorber. By arranging the hemagglutinating agent-containing region and the liquid film cleaving agent-containing region closer to the skin contact surface than the absorbent body, these functions and effects can be fully utilized, the liquid return amount can be reduced, and the surface after use The effect of improving whiteness is achieved.

  As the first embodiment of the sanitary product of the present invention, the core wrap sheet 42 located on the skin contact surface side of the absorbent core 41 is a mixture of a hemagglutinating agent and a liquid film cleaving agent, that is, And a sanitary napkin (hereinafter referred to as sanitary napkin 10C) in which the hemagglutinating agent-containing region and the liquid film cleaving agent-containing region overlap in both the thickness direction and the planar direction.

When the blood is excreted in the sanitary napkin 10C and the blood reaches the core wrap sheet 42, first, due to the effect of the liquid film cleaving agent, the blood cannot continue to form a liquid film, and the blood quickly enters the absorbent core 41. Will be drawn in. At the same time, erythrocyte aggregates are gradually formed by the effect of the hemagglutinating agent. Since the formed erythrocyte aggregate cannot pass through the gap in the absorbent core 41 any more, it is held on the middle in the thickness direction of the absorber 40. On the other hand, the plasma component in the blood further diffuses to the non-skin contact surface side of the absorbent core 41 and is held there. In all these processes, the blood that has passed through the liquid film cleaving agent-containing region diffuses in the plane direction. As a result, the blood diffusion area in the absorbent body 40 is larger on the non-skin contact surface side than on the skin contact surface side.
Due to the above phenomenon, with respect to the liquid return amount, the liquid held on the non-skin contact surface side of the absorber 40 is blocked by the red blood cell agglomerates and hardly moves to the skin contact surface side. In addition, since no liquid film is formed on the core wrap sheet 42, it is difficult to form a liquid conduction path to the top sheet 20. Due to the above synergistic effect, the liquid return amount of the sanitary napkin 10C is significantly reduced as compared with the sanitary napkin 10A and the sanitary napkin 10B.
Next, regarding the surface whiteness, since the red blood cell aggregate is held in the middle of the absorbent body 40 in the thickness direction, it is difficult to see through from the surface sheet 20 side. In addition, since the diffusion area on the skin contact surface side of the absorbent body 40 is small, the sanitary napkin 10C exhibits whiteness superior to the sanitary napkin 10A.

  As a second embodiment of the sanitary product of the present invention, a liquid film cleaving agent-containing region is provided on the top sheet 20, and a hemagglutinating agent-containing region is provided on the core wrap sheet 42 located on the skin contact surface side of the absorbent core 41. And sanitary napkins (hereinafter referred to as sanitary napkins 10D). In the sanitary napkin 10D, the liquid film cleaving agent-containing region of the topsheet 20 and the hemagglutinating agent-containing region of the core wrap sheet 42 are at least partially overlapped, preferably all overlapped in plan view.

  The sanitary napkin 10D has the same phenomenon as the sanitary napkin 10C, except that a liquid film is not formed not only on the core wrap sheet 42 but also on the top sheet 20. Thereby, since the whiteness of the topsheet 20 itself is improved as compared with the sanitary napkin 10C, the concealability to the erythrocyte aggregate in the absorber 40 is also improved. As a result, the sanitary napkin 10D has an even better surface whiteness than the sanitary napkin 10C.

  In the sanitary product of the present invention, the hemagglutinating agent and the liquid film cleaving agent may be disposed at any location on the skin contact surface side of the absorbent body or the absorbent body. However, even if it is a case where it arrange | positions to an absorber, it is preferable to arrange | position any agent to the core wrap sheet | seat located in the skin contact surface side of an absorber, or the skin contact surface side of an absorber. . That is, any agent is preferably arranged on the skin contact surface side from the superabsorbent polymer. Thus, blood cells can be aggregated before blood is absorbed by the superabsorbent polymer. This also allows the surface tension of the blood to be lowered before the blood diffuses into the absorber.

  In the sanitary product of the present invention, the hemagglutinating agent-containing region is not arranged on the top sheet 20 but on the non-skin contact surface side from the top sheet. It is preferable at the point which produces | generates the aggregate of the non-liquid component in menstrual blood and prevents the non-liquid component from adhering to the user's skin. In both sanitary napkins 10C and 10D, the hemagglutinating agent-containing region is arranged on the core wrap sheet 42. The hemagglutinating agent-containing region may be disposed on the absorbent core 41.

  In the sanitary product of the present invention, the hemagglutinating agent-containing region and the liquid film cleaving agent-containing region are arranged at the same position in the thickness direction of the sanitary product, like the sanitary napkin 10C. However, from the viewpoint of easily obtaining the synergistic effect of both agents, it is preferable that the two regions are arranged at different positions. In particular, like the sanitary napkin 10D, the liquid film cleaving agent-containing region is more than the hemagglutinating agent-containing region. It is preferable to be disposed on the skin contact surface side. In this case, the state that “the liquid film cleaving agent-containing region is arranged on the skin contact surface side from the hemagglutinating agent-containing region” is a state where both regions overlap in the plan view of the sanitary product. It only has to be established between the parts.

  On the other hand, in the planar direction of the sanitary product, the hemagglutinating agent-containing region and the liquid membrane cleaving agent-containing region may be separated without overlapping, but from the viewpoint of easily obtaining the synergistic effect of both agents, the sanitary napkin 10C And like 10D, it is preferable that both area | regions overlap in a plane direction.

  In the case where the sanitary product of the present invention is a sanitary napkin as shown in FIGS. 5 and 6, the hemagglutinating agent-containing region and the liquid film cleaving agent-containing region are from the viewpoint of facilitating contact with blood in both regions. It is preferable to provide in the excretory opening contact area. In the case of a daytime sanitary napkin, the excretory opening contact area is the center in the width direction and the longitudinal direction. In the case of a night sanitary napkin, the night sanitary napkin is divided into four in the longitudinal direction. In the center in the width direction and the longitudinal direction of the divided region located second from the front side (the wearer's stomach side).

The distribution pattern in the planar direction of the hemagglutinating agent in the hemagglutinating agent-containing region and the distribution pattern in the planar direction of the liquid membrane cleaving agent in the liquid film-cleaving agent-containing region are not particularly limited, and any pattern can be adopted. .
Taking the hemagglutinating agent-containing region as an example, when the hemagglutinating agent-containing region is arranged on the core wrap sheet as in the sanitary napkins 10C and 10D described above, for example, the hemagglutinating agent is spread over the entire surface of the core wrap sheet. You may make it adhere continuously or you may make it adhere only to a part of one side of a core wrap sheet. The former form has the advantage of being able to cope with any excretion from any position, and the latter form has the advantage that it is possible to suppress a decrease in flexibility of the sheet due to adhesion of the hemagglutinating agent. Further, the adhesion pattern of the hemagglutinating agent is not limited to such a continuous adhesion pattern having no non-adhering portion of the hemagglutinating agent, but is a non-continuous mixture of adhering portions and non-adhering portions of the hemagglutinating agent. A simple adhesion pattern may be used. Examples of the non-continuous adhesion pattern include 1) a stripe pattern in which a hemagglutinating agent adhering in a planar view is intermittently arranged in a direction perpendicular to the longitudinal direction, and 2) a plurality of planar views intersecting each other. 3) A dot-like pattern in which adherent portions of hemagglutinating agent having a predetermined shape such as a circular shape in plan view are arranged in a scattered manner. The pattern 1) has an advantage that the excretory fluid can be diffused along the longitudinal direction of the adhering portion of the linear hemagglutinating agent. For example, the longitudinal direction of the adhering portion of the linear hemagglutinating agent is physiologically If it matches with the longitudinal direction of the article (the wearer's longitudinal direction), diffusion of excretory fluid such as menstrual blood in the longitudinal direction is promoted. Both patterns 2) and 3) have the advantage that surface redness due to residual red blood cell agglomerates is reduced, and the reliability of the effect of the hemagglutinating agent is further improved for the pattern 2). It also has the advantage of For the liquid film cleaving agent-containing region, the same agent adhesion pattern as the hemagglutinating agent-containing region can be adopted.

In the sanitary product of the present invention, the hemagglutinating agent-containing region and the liquid film cleaving agent-containing region may have different areas or the same area.
The total area of the hemagglutination-containing region in the catamenial, from the viewpoint of contact with the blood in a large area, preferably 30 cm ² or more, more preferably 70cm ² or more, 100 cm ² or more is more preferable. Further, the larger the total area of the hemagglutinating agent-containing region in the sanitary product, the better, but 350 cm ² or less is practical.
The total area of EkimakuHiraki cleaving agent-containing regions in the sanitary article, from the viewpoint of contact with the blood in a large area, preferably 10 cm ² or more, more preferably 30 cm ² or more, 50 cm ² or more is more preferable. Further, the total area of the liquid film cleaving agent-containing region in the sanitary napkin is preferably as large as possible, but 350 cm ² or less is realistic.

(Analysis method)
A method for analyzing a hemagglutinating agent, a liquid film cleaving agent, and a third component from a commercially available sanitary product is as follows.
First, the hot melt adhesive that bonds each member to a sanitary product to be analyzed is weakened using a heating device such as a dryer, and then decomposed into members such as a top sheet, an absorber, and a back sheet. Next, a multistage solvent extraction method from a nonpolar solvent to a polar solvent is performed on each decomposed member, the solvent is dried, and a mixture to be measured is taken out. After selecting an appropriate column and solvent according to the composition of the extracted substance, each component is fractionated by high performance liquid chromatography, and each fraction is further analyzed by NMR (nuclear magnetic resonance method), IR (infrared spectroscopy). Method), MS (mass spectrometry), elemental analysis, etc., to identify the structure of each fraction. At the same time, the weight of each fraction is measured. When a polymer compound is included, it becomes easier to identify the constituent components by using a technique such as gel permeation chromatography (GPC) together.
If the obtained component does not have a sufficient amount to be used for each measurement, a sufficient amount is obtained by procurement if the substance is a commercial product, or by synthesis if the material is not a commercial product.
Thereby, when the obtained component is a cationic polymer, or when it is a substance having the above-mentioned (property of forming aggregates), it is determined to be a hemagglutinating agent. In addition, when the expansion coefficient for the liquid having a surface tension of 50 mN / m is 15 mN / m or more, or the expansion coefficient for the liquid having a surface tension of 50 mN / m is larger than 0 mN / m. If the interfacial tension with respect to a liquid having a surface tension of 50 mN / m is 20 mN / m or less, or if it is a substance having the above-mentioned properties (disappearing liquid film), it is judged as a liquid film cleaving agent. . Those that do not fall under either the hemagglutinating agent or the liquid membrane cleaving agent are determined as the third component.

(Measurement of molecular weight)
The molecular weight of the cationic polymer (hemagglutinating agent) can be measured using HLC-8320GPC manufactured by Tosoh Corporation. Specific measurement conditions are as follows.
In the case of a copolymer containing a water-soluble polymerizable monomer such as hydroxyethyl methacrylate Separation column: a column in which a guard column α and an analytical column α-M are connected in series (manufactured by Tosoh Corporation)
Eluent: 150 mmol / L sodium sulfate and 1% by mass acetic acid dissolved in water Solvent flow rate: 1.0 ml / min
Injection volume: 100 μL
Separation column temperature: 40 ° C
In the case of a copolymer other than a copolymer containing a water-soluble polymerizable monomer such as hydroxyethyl methacrylate Separation column: a guard column α and an analytical column α-M connected in series (manufactured by Tosoh Corporation)
Eluent: ethanol: water = 3: 7 (volume ratio) in which 50 mmol / L lithium bromide and 1% by mass acetic acid are dissolved Solvent flow rate: 0.6 ml / min
Injection volume: 100 μL
Separation column temperature: 40 ° C
The detector uses RI (refractive index). As a measurement sample, 1 mg of the cationic polymer to be measured is dissolved in 1 mL of the eluent. A copolymer containing a water-soluble polymerizable monomer such as hydroxyethyl methacrylate has a molecular weight of 5900, a pullulan with a molecular weight of 47300, a pullulan with a molecular weight of 212,000, and a molecular weight of 788,000 with respect to 10 mL of the eluent. Pullulan, a pullulan mixture with 2.5 mg each dissolved, is used as the molecular weight standard. Except for a copolymer containing a water-soluble polymerizable monomer such as hydroxyethyl methacrylate, a polyethylene glycol (PEG) having a molecular weight of 106, a PEG having a molecular weight of 400, a PEG having a molecular weight of 1470, and a PEG having a molecular weight of 6450 with respect to 20 mL of the eluent. Polyethylene oxide (PEO) having a molecular weight of 50,000, PEO having a molecular weight of 235,000, PEO having a molecular weight of 875,000, and a PEG-PEO mixture in which 10 mg of each is dissolved is used as a molecular weight standard.

The weight average molecular weight of the polymer compound other than the cationic polymer is measured using a gel permeation chromatograph (GPC) “CCPD” (trade name, manufactured by Tosoh Corporation). The measurement conditions are as follows. The calculated molecular weight is calculated with polystyrene.
Separation column: GMHHR-H + GMHHR-H (cation)
Eluent: L Farmin DM20 / CHCl3
Solvent flow rate: 1.0 ml / min
Separation column temperature: 40 ° C

(Water solubility)
In the present specification, “water solubility” is a dissolvable mass of a hemagglutinating agent or a liquid membrane cleaving agent with respect to 100 g of deionized water. In the present specification, “water-soluble” refers to those having a water solubility of 10 g or more.
While stirring 100 g of deionized water with a stirrer in an environmental region having a temperature of 25 ° C. and a relative humidity (RH) of 65%, the compound to be measured is gradually dissolved, and the degree of dissolution is visually observed. The amount of dissolution of the compound at the time when the compound becomes insoluble, that is, when any one of floating, precipitation, precipitation and cloudiness can be visually confirmed is defined as water solubility. Specifically, it is measured by adding an agent every 0.0001 g. As a result, it is assumed that 0.0001 g is not dissolved, “less than 0.0001 g”, 0.0001 g is dissolved, and 0.0002 g is not dissolved, “0.0001 g”. When the compound to be measured is a surfactant, `` dissolution '' means both monodisperse dissolution and micelle dispersion dissolution, and the amount of dissolution when floating, precipitation, precipitation, or cloudiness is observed is the water solubility. It becomes.

(Production method)
The hemagglutinating agent-containing region and the liquid film cleaving agent-containing region are prepared by combining synthetic fibers constituting the nonwoven fabric, pulp fibers constituting the absorbent body, superabsorbent polymer, etc. with these agents alone or a solution containing the agent. It can be formed by soaking and then manufacturing a sanitary napkin. In addition to this, the synthetic fiber is made into a non-woven fabric and then applied to the non-woven fabric, or the pulp fiber is formed into an absorbent core or core wrap sheet, and then a single substance or a solution containing the agent is applied to them. Is mentioned. Examples of the solution include a solution obtained by diluting a hemagglutinating agent or a liquid membrane cleaving agent with a solvent (hereinafter, this solution is also referred to as an agent solution). The solution containing the liquid film cleaving agent may be mixed with the above-described phosphate ester type anionic surfactant. In this case, the content ratio of the liquid film cleaving agent and the phosphate ester type anionic surfactant is preferably as described above. As the solvent, those that can be emulsified by appropriately dissolving or dispersing these agents in a solvent so that they can be easily applied can be used without particular limitation. For example, alcohols such as ethanol and methanol, or water can be used to dissolve the hemagglutinating agent. In the case of an organic solvent such as ethanol, methanol, acetone, hexane, or an emulsified liquid for dissolving the liquid film cleaving agent, water can naturally be used as a solvent or a dispersion medium, and as an emulsifier used for emulsification Various surfactants including alkyl phosphate esters, fatty acid amides, alkyl betaines, sodium alkyl sulfosuccinates and the like can be mentioned. Examples of the solvent for simultaneously dissolving the hemagglutinating agent and the liquid film cleaving agent include a mixed solvent of water and alcohol.

  As a method for attaching the hemagglutinating agent and the liquid film cleaving agent to the surface of the constituent material, various commonly used methods can be employed without particular limitation. For example, the application | coating by spray, the application | coating by a slot coater, immersion etc. are mentioned. When these agents are applied to the nonwoven fabric, these treatments may be performed on the fibers before being made into a web, or after the fibers are made into a web by various methods. In addition, when these agents are applied to the absorbent body, these treatments may be performed on fluff pulp or absorbent polymer before making the absorbent body shape, or absorbed after making the absorbent body shape. You may perform with respect to a sex core or a core wrap sheet. Moreover, it is carried out using an agent solution obtained by dissolving these agents in a solvent, or an emulsion or dispersion of these agents, if necessary. In that case, it is preferable that the constituent material with these agents attached to the surface is dried at a temperature (for example, 120 ° C. or lower) sufficiently lower than the melting point or flash point of the constituent material by, for example, a hot air blowing type dryer. .

  The sanitary product of the present invention is not limited to a sanitary napkin, and can be applied to other sanitary products such as a panty liner as long as it can absorb blood.

The present invention further discloses the following embodiments with respect to the above-described embodiments.
<1>
It is a sanitary product having a surface sheet positioned on the skin contact surface side, a back sheet positioned on the non-skin contact surface side, and an absorbent body sandwiched between them,
On the skin contact surface side from the absorber or the absorber,
A hemagglutinating agent-containing region containing a hemagglutinating agent;
A sanitary product having a liquid film cleaving agent-containing region containing a liquid film cleaving agent.
<2>
The sanitary product according to <1>, wherein the hemagglutinating agent is a cationic polymer.

<3>
The sanitary product according to <1> or <2>, wherein the liquid film cleaving agent has an expansion coefficient of 15 mN / m or more for a liquid having a surface tension of 50 mN / m.
<4>
It is a sanitary product having a surface sheet positioned on the skin contact surface side, a back sheet positioned on the non-skin contact surface side, and an absorbent body sandwiched between them,
On the skin contact surface side from the absorber or the absorber,
A cationic polymer-containing region containing a cationic polymer;
A sanitary product comprising a compound-containing region containing the following compound C1.
[Compound C1]
A compound having an expansion coefficient of 15 mN / m or more for a liquid having a surface tension of 50 mN / m.

<5>
The expansion coefficient of the liquid film cleaving agent or the compound C1 with respect to a liquid having a surface tension of 50 mN / m is 15 mN / m or more, preferably 20 mN / m or more, more preferably 25 mN / m or more, The sanitary product according to any one of <1> to <4>, more preferably 30 mN / m or more and 50 mN / m or less.
<6>
<1> to <5, wherein the liquid film cleaving agent or the compound C1 is composed of a compound having at least one structure selected from the group consisting of the following structures X, XY, and YXY. > The sanitary product according to any one of the above.
In structure X,> C (A)-<C represents a carbon atom. Moreover, <,>, and-show a bond. The same applies hereinafter. _{>, - C (A) 2} -, - C (A) (B) -,> C (A) -C (R 1) <,> C (R 1) -, - C (R 1) (R 2 )-, -C (R ¹ ) ₂ -,> C <, and -Si (R ¹ ) ₂ O-, -Si (R ¹ ) (R ² ) O- Or a siloxane chain having a structure in which two or more kinds are combined, or a mixed chain thereof. At the end of the structure X, a hydrogen atom, or -C (A) ₃ , -C (A) ₂ B, -C (A) (B) _2, -C (A) ₂ -C (R ¹ ) ₃ , -C (R ¹ ) ₂ A, -C (R ¹ ) ₃ , and -OSi (R ¹ ) ₃ , -OSi (R ¹ ) ₂ (R ² ), -Si (R ¹ ) ₃ , -Si (R ¹ ) _{2 It} has at least one group selected from the group consisting of (R ² ).
R ¹ and R ² each independently represent a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, or a halogen atom. A and B each independently represent a substituent containing an oxygen atom or a nitrogen atom. When there are a plurality of R ¹ , R ² , A, and B in the structure X, they may be the same as or different from each other.
Y represents a hydrophilic group having hydrophilicity including an atom selected from a hydrogen atom, a carbon atom, an oxygen atom, a nitrogen atom, a phosphorus atom, and a sulfur atom. When Y is plural, they may be the same or different.
<7>
The liquid film cleaving agent or the compound C1 is an organic modified silicone, and the organic modification is amino modification, epoxy modification, carboxy modification, diol modification, carbinol modification, (meth) acryl modification, mercapto modification, phenol modification, <1 which is one or more selected from polyether modification (including polyoxyalkylene modification), methylstyryl modification, long chain alkyl modification, higher fatty acid ester modification, higher alkoxy modification, higher fatty acid modification, or fluorine modification The sanitary product according to any one of> to <6>.

<8>
The sanitary product according to any one of <1> to <6>, wherein the liquid film cleaving agent or the compound C1 is a polyoxyalkylene-modified silicone represented by the following formulas [I] to [IV].

<9>
The expansion coefficient of the liquid film cleaving agent for a liquid having a surface tension of 50 mN / m is greater than 0 mN / m,
The sanitary product according to <1> or <2>, wherein the liquid film cleaving agent has an interface tension with respect to a liquid having a surface tension of 50 mN / m of 20 mN / m or less.
<10>
It is a sanitary product having a surface sheet positioned on the skin contact surface side, a back sheet positioned on the non-skin contact surface side, and an absorbent body sandwiched between them,
On the skin contact surface side from the absorber or the absorber,
A cationic polymer-containing region containing a cationic polymer;
A sanitary product comprising a compound-containing region containing the following compound C2.
[Compound C2]
A compound having an expansion coefficient for a liquid having a surface tension of 50 mN / m is greater than 0 mN / m and an interfacial tension for a liquid having a surface tension of 50 mN / m is 20 mN / m or less.

<11>
The expansion coefficient of the liquid film cleaving agent or the compound C2 with respect to a liquid having a surface tension of 50 mN / m is larger than 0 mN / m, preferably 9 mN / m or more, more preferably 10 mN / m or more, The sanitary product according to <1>, <2>, <9> or <10>, more preferably 15 mN / m or more and 50 mN / m or less.
<12>
<1>, <2 wherein the liquid film cleaving agent or the compound C2 is composed of a compound having at least one structure selected from the group consisting of the following structures Z, ZY, and YZY. >, <9>-<11> any one of <11> sanitary goods.
The structure Z includes:> C (A)-<C: carbon atom>, -C (A) _2- , -C (A) (B)-,> C (A) -C (R ³ ) <,> C Any basic structure of (R ³ )-, -C (R ³ ) (R ⁴ )-, -C (R ³ ) ₂ -,> C <is repeated, or two or more types are combined Represents a hydrocarbon chain of structure. At the terminal of the structure Z, a hydrogen atom, or -C (A) ₃ , -C (A) ₂ B, -C (A) (B) _2, -C (A) ₂ -C (R ³ ) ₃ , —C (R ³ ) ₂ A, and at least one group selected from the group consisting of —C (R ³ ) ₃ .
R ³ and R ⁴ each independently represent a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, a fluoroalkyl group, an aralkyl group, a hydrocarbon group obtained by combining them, or a fluorine atom. A and B each independently represent a substituent containing an oxygen atom or a nitrogen atom.
Y represents a hydrophilic group having hydrophilicity including an atom selected from a hydrogen atom, a carbon atom, an oxygen atom, a nitrogen atom, a phosphorus atom, and a sulfur atom. When Y is plural, they may be the same or different.

<13>
The liquid film cleaving agent or the compound C2 is a polyoxyalkylene alkyl (POA) ether represented by any of the following formula [V] or a polyoxyalkylene alkyl (POA) ether represented by the following formula [VI] having a mass average molecular weight of 1000 or more. Any one of <1>, <2>, <9> to <12>, which is one or more selected from oxyalkylene glycol, steareth, behenez, PPG myristyl ether, PPG stearyl ether, or PPG behenyl ether The described sanitary products.

<14>
The liquid film cleaving agent or the compound C2 is a fatty acid represented by the following formula [VII], a glycerin fatty acid ester or a pentaerythritol fatty acid ester represented by the following formula [VIII-I] or [VIII-II], [IX], a partially esterified product of glycerin fatty acid ester, sorbitan fatty acid ester, or pentaerythritol fatty acid ester represented by any of the following formula [X] or the following formula [XI], represented by the following formula [XII] <1> which is one or more selected from the group consisting of a sterol, an alcohol represented by the following formula [XIII], a fatty acid ester represented by the following formula [XIV], or a wax represented by the following formula [XV]. , <2>, or any one of <9> to <12>.

<15>
The melting point of the liquid film cleaving agent or the compound C1 or the compound C2 is preferably 40 ° C. or lower, more preferably 35 ° C. or lower, preferably −220 ° C. or higher, more preferably −180. The sanitary product according to any one of <1> to <14>, wherein the sanitary product is at least ° C.
<16>
The water solubility of the liquid film cleaving agent or the compound C1 or the compound C2 is 0 g or more, preferably 1.0 × 10 ⁻⁹ g or more, and 0.025 g or less, preferably 0.8. The sanitary product according to any one of <1> to <15>, wherein the sanitary product is 0017 g or less, and more preferably less than 0.0001 g.
<17>
The interfacial tension of the liquid film cleaving agent or the compound C1 or the compound C2 with respect to a liquid having a surface tension of 50 mN / m is preferably 20 mN / m or less, more preferably 17 mN / m or less, and still more preferably. 13 mN / m or less, particularly preferably 10 mN / m or less, particularly preferably 9 mN / m or less, most preferably 1 mN / m or less, and more than 0 mN / m, <1> to The sanitary product according to any one of <16>.

<18>
The surface tension of the liquid film cleaving agent or the compound C1 or the compound C2 is preferably 32 mN / m or less, more preferably 30 mN / m or less, still more preferably 25 mN / m or less, particularly preferably. The sanitary product according to any one of <1> to <17>, which is 22 mN / m or less, and preferably 1 mN / m or more.
<19>
The liquid film cleaving agent or the compound C1 or the compound C2 has a weight average molecular weight of preferably 500 or more, more preferably 1000 or more, still more preferably 1500 or more, and particularly preferably 2000 or more. Moreover, Preferably it is 50000 or less, More preferably, it is 20000 or less, More preferably, it is 10,000 or less, The sanitary product in any one of said <1>-<18>.
<20>
Any of <1> to <19>, wherein the hemagglutinating agent or the cationic polymer is a quaternary ammonium salt homopolymer, a quaternary ammonium salt copolymer, or a quaternary ammonium salt polycondensate. The sanitary product according to 1.

<21>
The hemagglutinating agent or the cationic polymer preferably has a weight average molecular weight of 2000 or more, more preferably 10,000 or more, still more preferably 30,000 or more, and preferably 10 million or less, The sanitary product according to any one of <1> to <20>, more preferably 5 million or less, and still more preferably 3 million or less.
<22>
The hemagglutinating agent or the cationic polymer is a quaternary ammonium salt homopolymer having a structure having a main chain and a side chain bonded thereto, and having a repeating unit represented by the following formula 1. A quaternary ammonium salt copolymer having a repeating unit represented by the following formula 1 and a repeating unit represented by the following formula 2, and the main chain of the hemagglutinating agent or the cationic polymer: The sanitary product according to any one of <1> to <21>, wherein the side chain is bonded at one point, and the side chain has a quaternary ammonium moiety.

<23>
<1, wherein the hemagglutinating agent or the cationic polymer is a water-soluble cationic polymer having a streaming potential of 1500 μeq / L or more and comprising a quaternary ammonium salt homopolymer or a quaternary ammonium salt copolymer. The sanitary product according to any one of> to <22>.
<24>
The sanitary product according to any one of <1> to <23>, wherein the hemagglutination agent or the cationic polymer has an aggregation rate of 0.75 mPa · s / s or less.
<25>
The hemagglutinating agent or the cationic polymer has an inorganic value / organic value that is a ratio of an inorganic value to an organic value of 0.6 to 4.6, and the hemagglutinating agent or the The sanitary product according to any one of <1> to <24>, wherein the cationic polymer is a quaternary ammonium salt homopolymer, a quaternary ammonium salt copolymer, or a quaternary ammonium salt polycondensate. .

<26>
The sanitary product according to any one of <1> to <25>, wherein the absorbent body includes a superabsorbent polymer.
<27>
The sanitary product according to any one of the above items <1> to <26>, wherein the absorbent body has a piled body in which fluff pulp and a superabsorbent polymer are mixed.
<28>
<26> or above, wherein the hemagglutinating agent-containing region or the cationic polymer-containing region and the liquid film cleaving agent region or the compound-containing region are arranged closer to the skin contact surface than the superabsorbent polymer. The sanitary product according to <27>.

<29>
The sanitary product according to any one of <1> to <28>, wherein the hemagglutinating agent-containing region or the cationic polymer-containing region is disposed closer to the non-skin contact surface than the topsheet.
<30>
The liquid film cleaving agent-containing region or the compound-containing region is arranged on the skin contact surface side from the hemagglutinating agent-containing region or the cationic polymer-containing region, any one of <1> to <29> The sanitary product according to 1.
<31>
<1> to <30>, wherein the liquid film cleaving agent-containing region or the compound-containing region and the hemagglutinating agent-containing region or the cationic polymer-containing region overlap in a planar direction. Sanitary products.
<32>
The sanitary product according to any one of <1> to <31>, wherein the liquid film cleaving agent-containing region or the compound-containing region is disposed on the top sheet.

<33>
The sanitary product according to any one of <1> to <32>, wherein the absorbent body includes an absorbent core and a core wrap sheet that covers the absorbent core.
<34>
The sanitary product according to <33>, wherein the hemagglutinating agent-containing region or the cationic polymer-containing region is arranged on the core wrap sheet located on the skin contact surface side of the absorbent core.
<35>
One or both of the hemagglutinating agent-containing region or the cationic polymer-containing region and the liquid membrane cleaving agent region or the compound-containing region are arranged in the excretory opening contact region of the sanitary product, <1> The sanitary product according to any one of ~ <34>.

〔Example〕
Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to such examples. The expansion coefficient, interfacial tension, surface tension, and water solubility were measured in the environmental region at a temperature of 25 ° C. and a relative humidity (RH) of 65% as described above. In the following examples, the flow potential and IOB value of the hemagglutinating agent, and the surface tension, water solubility, and interfacial tension of the liquid film cleaving agent were measured by the above-described measurement method or calculation method. In the table below, “-” means that the agent indicated in the item name is not used, does not have a value corresponding to the item, and the like. OPU of a liquid film cleaving agent is a content ratio with respect to the fiber mass of the whole nonwoven fabric.

[Example 1]
A sanitary napkin having the same configuration as that of the sanitary napkin 10 shown in FIG. 5 was produced according to a conventional method. Specifically, from a commercially available sanitary napkin (Kao Co., Ltd. made in 2015, "Laurie Skin Cleanguard with ordinary wings") weakens the hot melt adhesive that bonds each member with a dryer and disassembles it. The top sheet, the back sheet, and the absorber thus taken out were used. This absorbent body is obtained by wrapping an absorbent core made of a mixed fiber of fluff pulp and superabsorbent polymer with a core wrap sheet (hereinafter also referred to as absorbent body X).
As a hemagglutinating agent, diallyldimethylammonium chloride (Marcoat 100 manufactured by Nihon Lubrizol Co., Ltd.) (hereinafter referred to as Agent A) is applied to the entire core wrap sheet (skin-side core wrap sheet) located on the skin contact surface side of the absorbent body X. After application, polyoxyethylene (POE) -modified dimethyl silicone (KF-6015 manufactured by Shin-Etsu Chemical Co., Ltd.) (hereinafter also referred to as agent G) was applied as a liquid film cleaving agent. A specific method for applying both agents will be described later.
In this way, the surface sheet is overlapped on the skin facing surface of the absorbent body X in which the hemagglutinating agent and the liquid film cleaving agent are applied over the whole area of the skin side core wrap sheet forming the skin facing surface, and both are applied with pressure. And a back sheet was superimposed on the non-skin facing surface of the absorbent body X to obtain a sanitary napkin of Example 1.

The application method of the agent A in Example 1 is as follows. Agent A is dissolved in the solvent ethanol, and a 0.06 mass% diluted solution is prepared as a coating solution. This coating solution is applied to the entire skin contact surface of the skin-side core wrap sheet of the absorbent body X by spraying. Then, the solvent was dried.
The coating method of the agent G in Example 1 is as follows. Agent G is dissolved in the solvent ethanol to prepare a diluted solution of 0.06% by mass of the active ingredient of the liquid film cleaving agent as a coating solution, and this coating solution is used as the skin contact surface of the skin-side core wrap sheet of the absorbent body X The whole area was applied by spraying, and then the solvent was dried. The agent G is composed of a dimethyl silicone chain in which X in the structure XY is composed of —Si (CH ₃ ) ₂ O—, Y is composed of a POE chain composed of — (C ₂ H ₄ O) —, and is an end group of the POE chain. Is a methyl group (CH ₃ ), the modification rate is 20%, and the polyoxyethylene addition mole number is 3.
When measuring the expansion coefficient and the interfacial tension of the polyoxyethylene (POE) -modified dimethyl silicone, the “liquid with a surface tension of 50 mN / m” is a polyion that is a nonionic surfactant in 100 g of deionized water. Add 3.75 μL of oxyethylene sorbitan monolaurate (trade name Leoor Super TW-L120, manufactured by Kao Corporation) with a micropipette (ACURA825, manufactured by Socorex Isba SA), and adjust the surface tension to 50 ± 1 mN / m. The solution used was used.

[Example 2]
A sanitary napkin of Example 2 was obtained in the same manner as in Example 1 except that the coating solution of the liquid film cleaving agent was applied to the top sheet instead of the core wrap sheet (absorber).

[Examples 3 to 7]
Sanitary napkins of Examples 3 to 7 were obtained in the same manner as in Example 1 except that the hemagglutinating agent was changed to the following agents BF.
Agent B (Example 3): diallyldimethylammonium chloride (manufactured by Knitbo Medical Co., Ltd., PAS-H-5L)
Agent C (Example 4): Polymethacryloxyethyldimethylammonium diethylsulfate (diethylsulfate of dimethylaminoethyl methacrylate was dissolved in ethanol as a solvent, and 2,2 ′ as an oil-soluble azo initiator -Azobis (2-methylpropionamidine) dihydrochloride (V-65B manufactured by Wako Pure Chemical Industries, Ltd.) was added and heated for polymerization to obtain a water-soluble quaternary ammonium salt homopolymer.
Agent D (Example 5): Polymethacryloxyethyldimethylammonium diethylsulfate / dimethylacrylamide copolymer (diethylsulfate of dimethylaminoethyl methacrylate and dimethylacrylamide in a molar ratio of the former / the latter = 56: 44) Used, dissolved in ethanol as a solvent, and added with oil-soluble azo initiator 2,2′-Azobis (2-methylpropionamidine) dihydrochloride (V-65B manufactured by Wako Pure Chemical Industries, Ltd.) and heated for copolymerization. To obtain a water-soluble quaternary ammonium salt copolymer.)
Agent E (Example 6): Polymethacryloxyethyltrimethylammonium sulfate (manufactured by Senka)
Agent F (Example 7): Polymethacryloxyethyl trimethyl ammonium methyl hydrochloride (methyl chloride of dimethylaminoethyl methacrylate was dissolved in ethanol as a solvent, and 2,2 ′ as an oil-soluble azo initiator -Azobis (2-methylpropionamidine) dihydrochloride (V-65B manufactured by Wako Pure Chemical Industries, Ltd.) was added and heated for polymerization to obtain a water-soluble quaternary ammonium salt homopolymer.

[Examples 8 to 9]
Sanitary napkins of Examples 8 to 9 were obtained in the same manner as in Example 1 except that the liquid film cleaving agent was changed to the following agents HI.
Agent H (Example 8): polyoxypropylene (POP) alkyl ether (manufactured by Kao Corporation, antifoaming agent No. 8)
Agent I (Example 9): Tricaprylic acid / Caprylic acid glycerin (manufactured by Kao Corporation, Coconut MT)

Example 10
A surface sheet obtained by weakening, disassembling, and taking out the hot melt adhesive that bonds each member using a drier from a commercially available sanitary napkin (Kao Co., Ltd. 2015 “Lorrie Slim Guard firmly with wings for daytime”) , Back sheet and absorber were used. This absorbent body is obtained by wrapping an absorbent core in which five sheets of superabsorbent polymers sandwiched between two crepe papers are laminated with a core wrap sheet (hereinafter also referred to as absorbent body Y). A sanitary napkin of Example 10 was obtained in the same manner as Example 1 except for the above points.

[Reference Example 1]
A sanitary napkin of Reference Example 1 was obtained in the same manner as in Example 1 except that the liquid film cleaving agent was not applied.

[Reference Example 2]
A sanitary napkin of Reference Example 2 was obtained in the same manner as in Example 1 except that the hemagglutinating agent was not applied.

[Reference Example 3]
A sanitary napkin of Reference Example 3 was obtained in the same manner as in Example 10 except that the liquid film cleaving agent was not applied.

[Reference Example 4]
A sanitary napkin of Reference Example 4 was obtained in the same manner as in Example 10 except that the hemagglutinating agent was not applied.

[Comparative Example 1]
Comparative Example 1 of a commercially available sanitary napkin (“Kari Co., Ltd., 2015,“ Laurie Skin Cleanguard with ordinary wings ”), that is, a sanitary napkin that does not contain any hemagglutinating agent or liquid film cleaving agent Sanitary napkin.

  About the said Example, the reference example, and the comparative example, the liquid return amount, the diffusion area, and the surface whiteness (L value) were each evaluated by the following method. The results are as shown in Tables 2 to 5 below.

<Evaluation method of liquid return amount>
The sanitary napkin to be evaluated is spread in a flat shape and placed horizontally so that the skin facing surface side (surface sheet side) faces upward. On the napkin, an acrylic product having a cylinder inner diameter of 22 mmφ and a cylinder height of 50 mm is made. Acrylic liquid injection plate integrally molded so that the cylindrical part is positioned on the liquid injection opening of 10 mmφ, the liquid injection hole of the excretory part facing region on the skin facing surface (surface sheet side) of the sanitary napkin The stack was placed so as to be located at the center, and an appropriate weight was placed thereon (including the liquid injection plate itself) to adjust the load to 5 g / m ² . 3 g of the simulated blood was measured in a 10 cc injection beaker. This blood was poured all at once into the cylinder of the liquid injection plate, left for 3 minutes, then 3 g was poured again, and the sanitary napkin was left as it was for 3 minutes. Immediately after that, 10 pieces of weighed absorbent paper (Advantech 5A, 55 mmφ) and a cuboid weight weighing 960 g were placed on the napkin where blood was poured and allowed to stand for 10 seconds, and the absorbent paper after 10 seconds. From the weight, the amount (g) of blood absorbed by the absorbent paper was calculated. The measurement was performed three times, and the average value was used as the liquid return amount of the sanitary napkin. It shows that the said sanitary napkin is excellent in absorption performance, so that the value of liquid return amount is small.

<Diffusion area evaluation method>
The surface sheet and the like are removed from the sanitary napkin immediately after performing the above <Method for evaluating liquid return amount>, and an OHP sheet (KOKUYO Corporation) is provided on each of the skin contact surface side and the non-skin contact surface side of the absorbent body. Recycled OHP film A4 size VF-1300N transparent) was overlaid and the wetted area was copied. Thereafter, the OHP sheet was read with a scanner, captured with image software (Image-Pro 6.2J, manufactured by Nippon Roper Co., Ltd.), and the area was calculated. The measurement was performed three times, and the average value was defined as each diffusion area.
The ratio (the latter / the former) of the diffusion area on the non-skin contact surface side of the absorber and the diffusion area on the skin contact surface side of the absorber was calculated. When this ratio exceeds 1, that is, when the diffusion area on the non-skin contact surface side is larger than the diffusion area on the skin contact surface side, blood (pseudo blood) absorbs the absorber on the skin contact surface side. It means that it diffused in the plane direction when moving from the side to the non-skin contact surface side, and the larger this ratio exceeds 1, it means that the diffusion was promoted. And, the diffusion of such blood is promoted by the fact that the blood remaining on the skin contact surface side is non-skin contact surface side for the user who viewed the skin contact surface side of the sanitary product after use. Since it is relatively less than the above, it can lead to giving a sense of reliability and a sense of security to the absorbent performance of the sanitary product, and can also lead to an improvement in surface whiteness after use. That is, the higher the ratio, the higher the evaluation.

<Method for evaluating surface whiteness (L value)>
A color difference meter (SPECTRO PHOTOMETER NF333 manufactured by Nippon Denshoku Industries Co., Ltd.) is applied to the surface sheet from the injection site of blood (the simulated blood) for the sanitary napkin immediately after performing the above <Method for evaluating liquid return amount>. I measured it. The measurement was performed three times, and the average value was taken as the L value. It shows that it is excellent in the surface white after use, so that L value is large.

As shown in Tables 2 to 4, Examples 1 to 9 contained both the hemagglutinating agent and the liquid membrane cleaving agent, so the liquid return amount was 1/10 or less of Comparative Example 1. Since Example 1 contains both a hemagglutinating agent and a liquid membrane cleaving agent, the liquid return amount is 1/5 or less than Reference Example 1 and Reference Example 2 containing only one of them, The L value was larger than that of Reference Example 1 and excellent in whiteness. Moreover, since Examples 2-9 have a liquid film cleaving agent on the surface sheet, the L value was larger than those of Comparative Example 1 and Reference Example 1, and was very excellent in whiteness.
Moreover, as shown in Table 5, even when the absorber is changed from the absorber X to the absorber Y, Example 10 containing both the hemagglutinating agent and the liquid film cleaving agent contains only one of them. The liquid return amount was smaller than those in Reference Examples 3 and 4, and the L value was a large value.

1 Menstrual Blood 2 Liquid Component 3 Non-Liquid Component 4 Superabsorbent Polymer 5 Coating 6 Aggregate 7 Fiber 8 Liquid Film 9 Liquid Film Cleavage Agent 10 Sanitary Napkin (Sanitary Goods)
20 Top sheet 30 Back sheet 40 Absorber 41 Absorbent core 42 Core wrap sheet 50 End seal part 60 Leak-proof groove 70 Side sheet X Vertical direction Y Horizontal direction

Claims (10)

It is a sanitary product having a surface sheet positioned on the skin contact surface side, a back sheet positioned on the non-skin contact surface side, and an absorbent body sandwiched between them,
On the skin contact surface side from the absorber or the absorber,
A hemagglutinating agent-containing region containing a hemagglutinating agent;
A sanitary product having a liquid film cleaving agent-containing region containing a liquid film cleaving agent.   The sanitary product according to claim 1, wherein the hemagglutinating agent is a cationic polymer.   The sanitary product according to claim 1 or 2, wherein the liquid film cleaving agent has an expansion coefficient of 15 mN / m or more for a liquid having a surface tension of 50 mN / m. It is a sanitary product having a surface sheet positioned on the skin contact surface side, a back sheet positioned on the non-skin contact surface side, and an absorbent body sandwiched between them,
On the skin contact surface side from the absorber or the absorber,
A cationic polymer-containing region containing a cationic polymer;
A sanitary product comprising a compound-containing region containing the following compound C1.
[Compound C1]
A compound having an expansion coefficient of 15 mN / m or more for a liquid having a surface tension of 50 mN / m. The expansion coefficient of the liquid film cleaving agent for a liquid having a surface tension of 50 mN / m is greater than 0 mN / m,
The sanitary product according to claim 1 or 2, wherein an interface tension of the liquid film cleaving agent with respect to a liquid having a surface tension of 50 mN / m is 20 mN / m or less. It is a sanitary product having a surface sheet positioned on the skin contact surface side, a back sheet positioned on the non-skin contact surface side, and an absorbent body sandwiched between them,
On the skin contact surface side from the absorber or the absorber,
A cationic polymer-containing region containing a cationic polymer;
A sanitary product comprising a compound-containing region containing the following compound C2.
[Compound C2]
A compound having an expansion coefficient for a liquid having a surface tension of 50 mN / m is greater than 0 mN / m and an interfacial tension for a liquid having a surface tension of 50 mN / m is 20 mN / m or less.   The sanitary product according to any one of claims 1 to 6, wherein the hemagglutinating agent-containing region or the cationic polymer-containing region is arranged closer to the non-skin contact surface than the top sheet.   The liquid film cleaving agent-containing region or the compound-containing region is arranged on the skin contact surface side from the hemagglutinating agent-containing region or the cationic polymer-containing region, according to any one of claims 1 to 7. The described sanitary products.   The physiology according to any one of claims 1 to 8, wherein the liquid film cleaving agent-containing region or the compound-containing region and the hemagglutinating agent-containing region or the cationic polymer-containing region overlap in a planar direction. Supplies. The sanitary product according to any one of claims 1 to 9, wherein the liquid film cleaving agent-containing region or the compound-containing region is disposed on the top sheet.