TW201328733A - Absorbent article - Google Patents

Abstract

Anabsorbent article includes an absorbent body having through-holes running from the skin facing side to the non-skin facing side. A top sheet at least partially covers the interior walls of the through-holes of the absorbent body, and the top sheet at least partially covering the interior walls of the through-holes is coated with a blood modifying agent. The blood modifying agent has an Inorganic-Organic Balance of 0.00-0.60, a melting point of no higher than 45 degree and a water solubility of no greater than 0.05 g in 100 g of water at 25 degree.

Description

Absorbent article

The present invention relates to an absorbent article for absorbing menstrual blood such as a tampon of a sanitary napkin and a secretion.

It is known that a needle-shaped projection or a conical projection is inserted into the absorbent body, and a through hole penetrating the inside of the absorbent body or a non-penetrating hole having a depth of 50% or more of the thickness of the absorbent body is formed in the absorbent article of the absorbent body. Past technology (for example, Patent Document 1). Thereby, the absorber can be made soft.

Advanced technical literature Patent literature

Patent Document 1 Patent No. 3556581

However, in the absorbent article described in Patent Document 1, since there is no absorber below the through hole or the upper portion of the non-through hole of the absorber of the surface sheet, when the surface sheet is adsorbed by the user's menstrual blood, The menstrual blood attached to the portion is not absorbed by the absorbent body and remains. Further, in the absorbent body obtained by coating the mixture of the wood pulp and the absorbent polymer (SAP) on the toilet paper, when the through hole or the non-through hole is formed in the absorbent body, the toilet paper is broken, so that the self-absorbing body penetrates. Holes or non-through holes will have absorbers The case of wood pulp and / or absorbent polymer leakage.

The present invention is intended to provide an absorbent article in which the absorbent article can have a refreshing feeling by providing a structure in which the absorbent article can prevent leakage of the self-absorbent body, and it is difficult for the surface layer sheet to retain menstrual blood.

In order to solve the above problems, the present invention adopts the following configuration.

The present invention relates to a liquid-permeable surface sheet provided on the skin side, a liquid-impermeable back sheet provided on the garment side, and a surface layer and a back sheet which are interposed between the surface sheet and the back sheet. The absorbent article of the liquid-retaining absorbent body that penetrates the hole, the surface layer sheet is a hole covering the through hole of the absorber, and the surface layer sheet covering the hole of the hole is coated with a blood modifying agent, and the blood is modified. The agent has an IOB of 0 to 0.60, a melting point of 45 ° C or less, and a water solubility of 0.05 g or less of 100 g of water at 25 ° C.

According to the present invention, the composition of the absorbent body can suppress the leakage of the self-absorbent body, and the menstrual sheet does not easily retain menstrual blood, and the adhesive sheet has no sticky feeling, and the absorbent article has a refreshing feeling.

Form of implementing the invention

Hereinafter, an absorbent article according to an embodiment of the present invention will be described with reference to the drawings. However, the invention is also limited to those described in the drawings.

Fig. 1 is a partially broken plan view showing an absorbent article according to an embodiment of the present invention, and Fig. 2 is a schematic cross-sectional view showing the A-A broken surface shown in Fig. 1. The absorbent article 1 is a liquid-permeable surface sheet 2 provided on the skin side, a liquid-impermeable back sheet 3 provided on the garment side, and a liquid retaining property interposed between the surface sheet 2 and the back sheet 3. The absorber 4 is. The absorbent body 4 has a through hole 10 that penetrates between the side of the skin of the absorbent body 4 and the side of the garment. The top sheet 2 is a through hole covering the absorber 4. Further, the surface sheet 2 is a blood modifying agent application region 8 to which a blood modifying agent is applied in a region where the through hole 10 is formed.

The absorbent article 1 further includes one pair of side sheets 5 provided on both sides in the width direction of the surface sheet 2. Further, the absorbent article 1 has a main body portion 6 and a pair of wing portions 7 extending in the width direction from the main body portion 6.

The surface sheet 2 and the back sheet 3 are joined by the sealing portion 11 by embossing. Further, by the embossing, the back sheet 3 and the side sheet 5 are joined by the sealing portion 12. The sealing portions 11 and 12 are provided on the outer periphery of the absorbent article 1. Adhesive portions 13, 14 are provided on the garment side of the back sheet 3. In addition, in FIG. 1, the width direction of the absorbent article 1 is the X-axis direction, and the longitudinal direction is the Y-axis direction. Further, the plane direction is a plane direction that expands in the Y-axis direction of the X-axis.

The shape of the main body portion 6 is a substantially rectangular shape, a slightly elliptical shape, a slightly scoop type, or the like, and is only suitable for a shape of a female body and a panty, and is not particularly limited. In the outer shape of the main body portion 6, the extension in the longitudinal direction is preferably 100 to 500 mm, more preferably 150 to 350 mm. Further, the extension in the width direction of the outer shape of the main body portion 6 is preferably 30 to 200 mm, more preferably 40. ~180mm.

The top sheet 2 is an absorbent body 4 in which the menstrual blood discharged from the user is passed therethrough. Moreover, the surface sheet 2 holds the absorber 4 by interposing the absorber 4 with the back sheet 3. The surface sheet 2 is liquid permeability in whole or in part, and the liquid permeation region of the surface sheet 2 is a liquid permeable non-woven fabric, a woven fabric, a resin film forming a plurality of liquid permeation holes, or a mesh sheet having a plurality of meshes. It is formed.

As the material of the nonwoven fabric or the woven fabric used for the surface sheet 2, any of natural fibers and chemical fibers can be used. Examples of the natural fiber include pulverized wood pulp and cellulose such as cotton. Examples of the chemical fiber include regenerated cellulose such as hydrazine and fiber ray, semi-synthetic cellulose such as acetate and triacetate, thermoplastic hydrophobic chemical fiber, and thermoplastic hydrophobic chemical fiber subjected to hydrophilization treatment. Can be mentioned. As thermoplastic hydrophobic chemical fibers, there are single fibers such as polyethylene (PE), polypropylene (PP), and polyethylene terephthalate (PET), and fibers and core-sheath structures obtained by graft polymerization of PE and PP. The composite fiber can be exemplified.

When the non-woven fabric used for the surface sheet 2 is produced, it may be any of a dry method (carding method, spunbonding method, melt blowing method, air-laid method, etc.) and a wet method, and a combined dry method and wet method may be implemented. Mesh molding of the formula. Examples of the bonding method of the mesh mold used in the production of the nonwoven fabric for the surface sheet 2 include heat bonding, needle punching, and chemical bonding, but are not limited thereto. Further, the water flow association formed by the water flow entanglement method can be used for the surface sheet 2. Moreover, by shrinking the lower layer side by using a heat shrinkable fiber or the like, a non-woven fabric in which irregularities are formed on the upper layer side, and a surface due to formation of the net mold For air, a nonwoven fabric in which irregularities are formed is equal to a non-woven fabric having irregularities on the side of the skin, and can be used as the topsheet 2. Thereby, the contact area between the surface sheet 2 which imparts unevenness on the side of the skin and the skin can be reduced.

In the fiber in which the nonwoven fabric is used for the surface sheet 2, a core-sheath type having a higher melting point than the sheath component, a eccentric type of the core sheath, or a side-by-side type composite fiber having a different melting point of the left and right components can be used. In addition, it can be mixed with hollow fibers, or flat fibers, Y-shaped and C-shaped fibers, or three-dimensional crimped fibers that are sometimes crimped or crimped, or physically loaded by water, heat, or embossing. A fiber such as a divided fiber is used for the non-woven fabric of the surface sheet 2.

The fiber fineness of the non-woven fabric used for the surface sheet 2 is preferably from 1.1 to 8.8 dtex in consideration of penetration of liquid or skin contact.

When the hydrophobic synthetic fiber is used for the surface sheet 2, a hydrophilic agent or a water repellent agent may be kneaded in a hydrophobic synthetic fiber or a hydrophilic agent or a water repellent agent in consideration of liquid infiltration property or rewetting of the surface layer sheet 2. The coating is applied to a hydrophobic synthetic fiber. Further, the hydrophobic synthetic fiber can be rendered hydrophilic by corona treatment or plasma treatment. Thereby, when the blood modifying agent is lipophilic, in the blood modifying agent application region 8, the hydrophilic portion and the lipophilic portion become sparsely coexisting, and the menstrual blood hydrophilic component (mainly plasma) and the lipophilic component (mainly Both the blood cells) are quickly moved from the surface sheet 2 to the absorber 4.

In order to improve the concealability of the surface sheet 2, an inorganic filler such as titanium oxide, barium sulfate or calcium carbonate may be contained in the non-woven fabric used for the surface sheet 2. In the case where the non-woven fabric is a core-sheath type composite fiber, only the core may contain an inorganic filler, and may be contained only in the sheath.

When a resin film or a mesh sheet is used as the top sheet 2, the resin film or the web sheet may be formed of polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET) or the like.

As described above, the top sheet 2 is a blood modifying agent application region 8 having a blood modifying agent applied thereto. The blood modifying agent will be described in detail later. As will be described later, the blood modifying agent of the region 8 is applied by the blood modifying agent to lower the viscosity and surface tension of the menstrual blood, and the menstrual blood discharged from the blood modifying agent application region 8 of the surface sheet 2 is rapidly derived from the surface sheet 2 It is moved to the absorber 4 and absorbed by the absorber 4. As a result, the absorption speed of the menstrual blood absorbed by the absorbent body 4 is rapidly changed, and it is difficult to retain the menstrual blood having a high viscosity in the surface sheet 2, and the surface sheet 2 has no stickiness and can have a refreshing feeling. Further, with the blood modifying agent, the viscosity and surface tension of the menstrual blood having a high viscosity are lowered, and the menstrual blood is moved to the absorbent body 4, and it is difficult to retain a high-viscosity menstrual blood clot on the surface sheet, and the user is not visually perceptible. Uncomfortable. Further, the menstrual blood discharged from the surface sheet 2 by the user can suppress leakage outside the width direction side of the absorbent article 1.

The coated surface of the sheet 2 blood modifying agent of the weight per unit area is preferably 1 ~ 30g / m ^2, more preferably of 3 ~ 10g / m ^2. When the weight ratio of the blood modifying agent per unit area is 1 g/m ² hours, the blood modifying agent may not be stably applied to the surface layer 2, and the weight per unit area of the blood modifying agent may be applied. When the thickness is 30 g/m ² , the surface sheet 2 may be muddy.

After heating the blood modifying agent to a desired temperature, it is applied to a contact coater such as a slot coater or a non-contact coater such as a spray coater, a curtain coater or a spiral coater. Surface sheet 2. Coating with blood modifying agent The region 8 can uniformly disperse the droplet-shaped blood modifying agent, and it is preferable to apply the blood modifying agent to the surface sheet 2 using a non-contact coater from the viewpoint of not imparting damage to the surface sheet 2 .

When a non-woven fabric for a surface sheet is produced, a blood modifying agent can be applied to the nonwoven fabric. Further, in the manufacturing step of the absorbent article 1, a blood modifying agent may be applied to the surface sheet 2. However, from the viewpoint of suppressing equipment investment, it is preferable to apply the blood modifying agent to the surface sheet 2 in the manufacturing step of the absorbent article 1. Further, between the manufacturing steps of the absorbent article 1, since the reduction of the blood modifying agent applied to the surface sheet 2 can be suppressed, the blood modifying agent is applied to the surface sheet in a step close to the completion of the absorbent article 1. 2 is better. For example, a blood modifying agent may be applied to the surface sheet 2 before the step of packaging the absorbent article 1.

The back sheet 3 prevents leakage of menstrual blood absorbed by the absorbent body 4. As the back sheet, a liquid impervious film mainly composed of polyethylene (PE), polypropylene (PP) or the like, an air-permeable resin film, and a nonwoven film in which a nonwoven fabric film is bonded to a nonwoven fabric such as spunbond or water flow can be used. An SMS non-woven fabric in which a melt-resistant non-woven fabric having high water resistance is sandwiched by a spunbonded nonwoven fabric having high strength. The absorbent article 1A is intended to be soft, and the back sheet 3 can be, for example, a low-density polyethylene (LDPE) resin having a weight per unit area of 15 to 30 g/m ² . A resin film is preferred.

The absorbent body 4 has a function of absorbing menstrual blood and holding it. The absorbent body 4 is high in volume, and the shape is not easily broken, and it is preferable that the chemical stimulation is less. As the absorber 4, for example, hydrophilic fibers and an absorbent polymer (SAP) can be used. The constituents of the absorbent body 4 are formed of an absorbent body covered with a covering material, a fluffy wood pulp, or a constituent of the absorbent body 4 such as an airlaid fiber nonwoven fabric, and a constituent of the absorbent body 4 such as a superabsorbent polymer. Absorber, etc.

Among the hydrophilic fibers of the absorbent body 4 in which the hydrophilic fiber or the absorbent polymer is covered with the covering material, there are pulverized wood pulp, cellulose such as cotton, regenerated cellulose such as enamel and fiber enamel, acetate and triethyl Semi-synthetic cellulose such as an acid ester, a particulate polymer, a fibrous polymer, a thermoplastic hydrophobic chemical fiber, a thermoplastic hydrophobic chemical fiber to be subjected to hydrophilization treatment, and a mixture thereof may be mentioned. Further, a continuous foam of a cellulose foam or a synthetic resin or the like may be used for the absorber 4. Further, the foam or the exfoliated material may be used for the absorber 4 after being pulverized and formed into an absorber shape. Among these, in consideration of low cost and easy molding, it is preferred to use pulverized wood pulp as the hydrophilic fiber of the absorbent body 4.

In the superabsorbent polymer of the absorber 4, a particulate polymer such as a sodium acrylate copolymer having absorbency and hygroscopicity is generally used. Further, in order to impart other functions to the polymer, silver, copper, zinc, ruthenium, activated carbon, an aluminum citrate compound or zeolite may be added to the polymer. Thereby, a function such as deodorizing property, antibacterial property, or endothermic effect can be imparted to the polymer.

The covering material of the absorber 4 which covers the structure of the absorber 4, such as a hydrophilic fiber and an absorbent polymer, is only the thing which does not isolate|separate liquid permeability and a polymer absorber, and it is not [ Special restrictions. For example, a woven fabric or a non-woven fabric can be used for the covering material. As the material of the woven fabric and the non-woven fabric, any of natural fibers and chemical fibers can be used. Among the natural fibers, there are pulverized wood pulp and cellulose such as cotton. Chemical fiber contains bismuth and fiber Semi-synthetic cellulose such as regenerated cellulose, acetate and triacetate, thermoplastic hydrophobic chemical fibers, and thermoplastic hydrophobic chemical fibers subjected to hydrophilization treatment may be mentioned.

In the method for forming a non-woven fabric of a coated material, the mesh molding may be performed by any one of a dry method (carding method, spunbonding method, melt blowing method, air laid method, etc.) or a wet method, or a combination of a dry method and a wet method. Legal person. Further, the method of bonding the non-woven fabric to the covering material may be a method such as thermal bonding, needle punching, or chemical bonding, but the method is not particularly limited. Further, the formation of a flaky water flow association by the water flow entanglement method can be used for the coating agent. Among these, in consideration of low cost and high barrier property, the covering material is preferably a wet paper formed by using a pulverized wood pulp as a main material.

An absorbent sheet and a polymer sheet can be used for the absorber 4. Thereby, the absorber 4 can be made thin. At this time, the thickness of the absorber 4 is preferably from 0.3 to 5 mm. Among the absorbent sheets, a wood pulp sheet obtained by exfoliating a fiber or the like using a binder or the like can be mentioned. As a polymer sheet, a composite sheet such as a pulverized wood pulp or a fiber in which a constituent such as a particulate polymer is mixed to form a sheet is exemplified. Further, the particulate polymer is mixed in a sheet formed of a sheet of fibers, and the sheet-like polymer is dispersed in a layered sheet in the fiber, and the sheet-like polymer in the fiber is dispersed in a cubic shape. Give it.

For the fibers used for the absorbent sheet or the polymer sheet, cellulose fibers such as wood pulp, regenerated cellulose fibers such as rayon and rayon, hydrophilic synthetic fibers such as polyvinyl alcohol fibers and polyacrylonitrile fibers, and the like are used. Polyethylene, polypropylene, polyethylene that hydrophilizes the surface of the fiber, such as a surfactant Fibers such as terephthalic acid ester, polyethylene/polypropylene composite fiber, and polyethylene/polyethylene terephthalate composite fiber are preferred. From the viewpoint of maintaining the hydrophilicity of the fibers, it is preferred to use cellulose fibers in the fibers of the absorbent sheet or the polymer sheet. As the particulate polymer used for the polymer sheet, a liquid which can absorb and retain 20 times or more of its own weight, and a gellizable polymer is preferred. Examples of such a polymer include starch, crosslinked carboxymethylated cellulose, polyacrylic acid and salts thereof, and polyacrylate graft polymers.

As described above, the absorbent body 4 is a through hole 10 having a side surface of the skin penetrating the absorbent body 4 and a side surface of the garment. As a result, not only the skin side surface of the absorbent body 4 but also the side surface of the garment, the menstrual blood discharged from both of them can be absorbed by the absorbent body 4, so that the absorbent body 4 can quickly absorb the menstrual blood. Further, in the portion where the back sheet 3 in the hole of the through hole 10 is close, the absorber 4 is a portion which can absorb menstrual blood and is separated from the skin of the wearer 4, and the absorber 4 can absorb menstrual blood. Thereby, after the menstrual blood is discharged to the absorbent article 1, the wearer can comfortably use the absorbent article. Moreover, the air permeability of the absorbent article 1 is improved by the through hole 10 provided in the absorber 4.

The number of the through holes 10 per 1 cm ² of the skin side surface of the absorbent body 4 is preferably from 1 to 10, more preferably from 1 to 5. When the number of the through holes 10 per 1 cm ² of the skin side surface of the absorbent body 4 is less than one, the through hole 10 may have a rapid absorption effect of losing menstrual blood. Further, when the number of the through holes 10 per 1 cm ² of the skin side surface of the absorbent body 4 is larger than 10, the absorbed menstrual blood is less likely to expand in the plane direction by the absorbent body 4, and is on the skin side of the absorbent body 4. A wide range, sometimes unable to absorb menstrual blood. Further, when the number of the through holes 10 per 1 cm ² of the skin side surface of the absorbent body 4 is larger than 10, the amount of absorbed menstrual blood absorbed by the absorbent body 4 may be lowered.

The opening area of the through hole 10 is preferably 0.01 to 10 mm ² , more preferably 0.1 to 2.5 mm ² . When the opening area of the through hole 10 is more than 0.01 mm for ² hours, the menstrual blood may not enter the hole of the through hole 10. Further, when the opening area of the through hole 10 is larger than 10 mm ² , the effect of rapid absorption of menstrual blood may not occur by the through hole 10 described above.

As shown in FIG. 3, the absorber 4 is an absorber surrounding area 42 which has the absorber center area|region 41 which forms the penetration hole 10, and the surroundings of the absorber center area 40. The thickness of the absorbent body 4 is not necessarily constant for the entire absorbent body 4. For example, the thickness of the absorbent body 4 in the absorbent body central region 41 may be different from the thickness of the absorbent body 4 in the absorbent body surrounding region 42. For example, the thickness of the absorbent body 4 in the absorbent body central region 41 may be thicker than the thickness of the absorbent body 4 in the peripheral region 42 of the absorbent body. Thereby, the absorbent article 1 can be adhered to the skin of the user. For example, the thickness of the absorbent body 4 in the absorbent body central region 41 is 2 mm, and the thickness of the absorbent body 4 in the absorbent body surrounding region 42 may be 1 mm.

The weight per unit area of the absorbent body 4 is not necessarily constant for the entire absorbent body 4, and for example, the weight per unit area of the absorbent body 4 in the absorbent body central region 41 and the absorbent body 4 in the peripheral region 42 of the absorbent body can be made. The weight per unit area is different. For example, the weight per unit area of the absorbent body 4 in the absorbent body central region 41 can be made higher than the weight per unit area of the absorbent body 4 in the peripheral region 42 of the absorbent body. Thereby, the menstrual blood absorbed by the absorbent body 4 can be concentrated in the central region 41 of the absorbent body. For example, when the composition of the absorbent body 4 is wood pulp and an absorbent polymer (SAP), the weight of the wood pulp of the absorbent body 4 in the absorbent body central region 41 is 300 g/m ² , and each of the absorbent polymers The weight per unit area is 30 g/m ² , the weight per unit area of the wood pulp of the absorbent body 4 in the region around the absorbent body is 100 g/m ² , and the weight per unit area of the absorbent polymer may be 10 g/m ² .

As described above, the inside of the hole of the through hole 10 of the absorber 4 is covered by the surface sheet 2. Thereby, it is possible to suppress the leakage of the constituent of the absorber 4 from the through hole 10 of the absorber 4. Further, the structure of the absorber 4 is prevented from leaking from the through hole 10 of the absorber 4, and only the surface sheet 2 is covered in the hole of the through hole 10, and the surface sheet 2 does not need to completely cover the inside of the hole of the through hole 10.

Since the top sheet 2 covers the inside of the hole of the through hole 10, there is no state in which the absorber is not present below the portion above the through hole 10 of the absorber 4 in the top sheet 2. Therefore, it is possible to suppress the menstrual blood remaining in the surface sheet 2.

By covering the inside of the hole through the surface sheet 2, the menstrual blood immersed in the hole passes through the surface sheet 2, and can be rapidly expanded in the entire cavity, and can be absorbed more quickly in the absorbent body 2. The absorbent body 2 can also quickly absorb high-viscosity menstrual blood by covering the surface sheet 2 through the hole of the hole.

The less the friction between the user's skin and the surface sheet 2, the less pressure the absorbent article 1 gives to the user. The portion in the hole covering the through hole in the surface sheet 2 does not come into contact with the skin of the user, and does not cause friction with the skin of the user. Therefore, it is covered by the surface sheet 2 The hole in the hole can reduce the pressure on the user of the absorbent article 1.

Next, a method of forming the through hole 10 in the hole by the surface sheet 2 to the absorber 4 will be described. FIG. 4 is an explanatory diagram showing an example of a method of forming the through hole 10 in the surface sheet 2 and the absorber 4.

The surface sheet 122 supplied from the surface sheet roll 120 is disposed on the upper side of the conveyor belt 110.

The pulverized wood pulp and the absorbent polymer 122 are supplied to the pattern drum 130 from a supply device of pulverized wood pulp and an absorbent polymer (not shown). A concave portion 134 is formed in a peripheral portion of the pattern drum 130 as a mixture of pulverized wood pulp and an absorbent polymer. The inside of the pattern drum 130 is a suction 136, and the pulverized wood pulp 132 supplied to the pattern drum 130 is sucked into the concave portion 134 and compressed. The absorber 112 formed in the recess 134 is disposed on the surface sheet 122.

Next, the through hole forming device 140 is used to form a through hole penetrating in the thickness direction on the surface sheet 122 and the absorber 112. The through hole forming device 140 is a protrusion roller 141 including a plurality of protrusions 141a having a shape of a needle shape, a cylindrical shape, and a conical shape on the outer peripheral surface, and a protrusion 141a fitted to the protrusion 141a at a position of the protrusion 141a of the corresponding protrusion roller 141. The recess 142a has a support roller 142 on the peripheral surface.

The absorber 122 that laminates the surface sheet 132 passes through the protrusion 141a of the protrusion roller 141, and a through hole is formed in the surface sheet 132 and the absorber 122. Here, after the surface sheet 2 is extended, a hole is opened in the surface sheet 2, and the rotational speed of the protrusion roller 141 and the support roller 142 is adjusted. Thereby, the through hole in the covering hole can be formed in the absorber 122 by the surface sheet 2.

As described above, the blood modifying agent application region 8 to which the blood modifying agent is applied is provided in a region where the through hole 10 of the surface sheet 2 is formed. Therefore, not only the surface sheet 2 disposed on the side surface of the skin of the absorbent body 4 but also the surface layer 2 covering the inside of the hole 10 is coated with a blood modifying agent. As will be described later, the blood modifying agent in the blood modifying agent application region 8 can reduce the viscosity and surface tension of the menstrual blood discharged from the blood modifying agent application region 8, and the blood modifying agent in the surface sheet 2 can be reduced. The menstrual blood discharged from the coating region 8 can be quickly moved from the surface sheet 2 to the absorbent body 4 and absorbed by the absorbent body 4. Therefore, after the blood modifying agent is applied to the surface sheet 2 covering the hole of the through hole 10, the menstrual blood immersed in the through hole 10 can be quickly moved from the surface sheet 2 to the absorbent body 4, and can be absorbed by the absorbent body 4 more quickly. . Further, with the blood modifying agent, the viscosity and surface tension of the menstrual blood having a high viscosity are lowered, and the menstrual blood is moved to the absorbent body 4, so that it is difficult to retain the menstrual blood mass having a high viscosity in the hole of the through hole 10, and the through hole can be suppressed. 10 is blocked by a high-viscosity menstrual blood clot.

Further, all of the plurality of through holes 10 formed in the absorbent article 1 may be coated with a blood modifying agent, or a through hole 10 formed in a portion of the plurality of through holes 10 of the absorbent article 1 to coat the blood modifying agent. .

The side sheet 5 shown in Fig. 1 and Fig. 2 prevents the menstrual blood from passing through the surface sheet 2 and leaking outward in the width direction of the absorbent article 1. The side sheets 5 are preferably hydrophobic or water repellency. For the side sheet 5, for example, a spunbonded nonwoven fabric or an SMS non-woven fabric or the like is used. Further, since the side sheet 5 is in contact with the skin of the user, it is preferable to use the hot air non-woven fabric which can reduce the frictional stimulation to the skin for the side sheet 5. Also, the absorbent article 1 may not have the side sheets 5.

The top sheet 2, the back sheet 3, the absorber 4, and the side sheet 5 are preferably joined to each other in order to prevent separation between the layers. For such joining, for example, embossing, ultrasonic, hot melt adhesives, and combinations thereof can be used. The top sheet 2 and the back sheet 3 are joined by embossing on the sealing portion 11. The back sheet 3 and the side sheet 5 are joined by the embossing at the sealing portion 12. The top sheet 2 and the side sheets 5 are joined to each other on both sides of the body portion 6 by a hot melt adhesive.

As an example of embossing, between the formed embossing roll and the flat roll, the peripheral edge portion of the absorbent body is pressed by combining the surface sheet and the back sheet, or by combining the surface sheet and the back sheet and the side sheet. The method of flowering (the so-called method of circular sealing). Thereby, the sealing portions 11 and 12 are formed in the absorbent article 1. The embossing rolls and/or the flat rolls are heated to soften the sheets, so that the sealing portions 11, 12 are more clear. Among the embossed patterns, a lattice pattern, a zigzag pattern, and a wavy pattern can be cited. At the boundary between the sealing portions 11, 12, since the absorbent article 1 is not easily folded, it is preferable that the embossing pattern is elongated in an intermittent manner.

Coating method such as spiral coating, coating coating, curtain coater coating, and peak spray gun coating when bonding a surface sheet, a back sheet, an absorber, and a side sheet using a hot melt adhesive A hot melt adhesive is applied to each of the sheets. Thereafter, the sheets are overlapped with each other to join the sheets to each other. After the sheets are joined to each other, embossing is further applied to increase the peel strength of the sheets.

Among the hot melt adhesives used for joining the sheets to each other, there are styrene-ethylene-butadiene-styrene (SEBS), styrene-butadiene-styrene (SBS), styrene-isoprene. Rubber-based systems such as styrene-styrene (SIS) A pressure-sensitive adhesive or a heat-sensitive adhesive which is mainly composed of an olefin such as a linear low-density polyethylene, or a polyvinyl alcohol, carboxymethyl cellulose, gelatin or the like which is formed of a water-soluble polymer. Further, a water-sensitive adhesive such as polyvinyl acetate or sodium polyacrylate which is formed of a water-swellable polymer may be mentioned. When the adhesive is exuded on the outside, the heat-sensitive adhesive having no debonding property can be preferably used as a hot melt adhesive type adhesive used for bonding the sheets to each other. As a specific example, there are 5 to 25% of SEBS, 40 to 60% of alicyclic saturated hydrocarbons, 1 to 10% of aromatic modified terpenes, and 15 to 35% of additives by melt-mixing. Can be mentioned.

The wing portion 7 is provided in the absorbent article 1 in order to securely fix the absorbent article 1 to the undergarment. After the wing portion 7 is folded on the outer side of the undergarment, the adhesive portion 13 is attached to the crotch portion of the underwear, and the absorbent article 1 can be stably fixed to the undergarment. The shape of the wing portion 7 is a slightly rectangular shape.

The adhesive portion 14 on the garment side of the back sheet 3 fixes the main body portion 6 to the inner side of the crotch portion, and the adhesive portion 13 on the garment side of the wing portion 7 fixes the wing portion 7 to the outer side of the crotch portion. As the adhesive for forming the adhesive portions 13 and 14, for example, any one of a styrene-based polymer, an adhesive-imparting agent, and a plasticizer can be used as a main component. Examples of the styrene-based polymer include a styrene-ethylene-butylene-styrene block copolymer, a styrene-butene polymer, a styrene-butene-styrene block copolymer, and a styrene-isobutylene. - A styrene copolymer or the like may be used alone or in combination of two or more kinds of polymers. Among them, from the viewpoint of good thermal stability, a styrene-ethylene-butylene-styrene block copolymer is preferably used as the adhesive for the adhesive portions 13, 14.

Further, as the adhesion-imparting agent and the plasticizer, it is preferred to use a solid organic compound at normal temperature. Examples of the adhesion-imparting agent include a C5-based petroleum resin, a C9-based petroleum resin, a dicyclopentadiene-based petroleum resin, a rosin-based petroleum resin, a polydecene resin, a terpene phenol resin, and the like, and a plasticizer, for example, Examples of the monomer plasticizer such as tricresyl phosphate, dibutyl phthalate or dioctyl phthalate include an ethylene polymer or a polymer plasticizer such as polyester.

Next, the blood modifying agent applied to the blood modifying agent application region 8 will be described in detail. With the blood modifying agent, the surface sheet 2 absorbs menstrual blood having a high viscosity, so that the viscosity and surface tension of the menstrual blood are lowered, and the menstrual sheet 2 to the absorbent body 4 can rapidly move the menstrual blood, so that the surface sheet 2 does not easily remain high in viscosity. The menstrual blood has no sticky feeling on the surface sheet 2, and can have a refreshing feeling. Moreover, with the blood modifying agent, the viscosity and surface tension of the menstrual blood having a high viscosity are lowered, and the menstrual blood is moved to the absorbent body 4. Therefore, it is difficult to retain a high-viscosity menstrual blood mass on the surface sheet, and the wearer does not visually. It is easy to feel uncomfortable.

[blood modifier]

The blood modifying agent of the present invention has an IOB of from about 0 to about 0.60, a melting point of about 45 ° C or less, and a water solubility of about 0.05 g or less at 25 ° C.

IOB (Inorganic Organic Balance) indicates the balance index of hydrophilicity and lipophilicity. In this specification, it is the formula of Oda: IOB=inorganic value/organic value The calculated value.

The inorganic value and the organic value are based on the organic concept map described in the area Vol. 11, No. 10 (1957) p. 719-725, which is based on Fujita Mu's "Predicting and Organic Concepts of Organic Compounds".

The organic and inorganic values of the main base are summarized by Fujita as Table 1 below.

For example, an ester of a carbon number of 14 tetradecanoic acid and a carbon number 12 dodecyl alcohol has an organic value of 520 (CH ₂ , 20 × 26) and an inorganic value of 60 (-COOR, 60 × 1), so IOB = 0.12.

For the above blood modifying agent, IOB is preferably from about 0 to about 0.60, preferably from about 0 to about 0.50, more preferably from about 0 to about 0.40, most preferably from about 0 to about 0.30. Because the lower the IOB, the higher the organicity, the higher the affinity with the blood cells.

The "melting point" in the present specification is the peak temperature of the endothermic peak when changing from a solid state to a liquid state at a temperature increase rate of 10 ° C / min by a differential scanning calorimeter. The melting point is measured by, for example, a DSC-60 type DSC measuring apparatus manufactured by Shimadzu Corporation, at a temperature increase rate of 10 ° C / min.

The blood modifying agent may have a melting point of about 45 ° C or less, may be liquid at room temperature, or may be solid, that is, the melting point may be above about 25 ° C, or may be less than about 25 ° C, for example, may have about -5 °C, about -20 ° C and other melting points. The melting point of the above blood modifying agent may be about 45 ° C or less as shown below.

The blood modifying agent has no lower limit at the melting point, but the vapor pressure is preferably lower. The vapor pressure of the blood modifying agent is preferably about 0.01 Pa or less at 1 atm and 25 ° C, preferably about 0.001 Pa or less, more preferably about 0.0001 Pa or less. The absorbent article disclosed in the present invention is preferably used in contact with a human body, and the vapor pressure is preferably about 0.01 Pa or less at 1 atm and 40 ° C, preferably about 0.001 Pa or less, and about 0.0001 Pa or less. For better. Because if the vapor pressure is high, there will be problems such as gasification during storage, reduction of blood reforming dose, and odor during use.

Moreover, the melting point of the blood modifying agent can be classified according to the climate, the length of time of use, and the like. For example, in a region where the average temperature is 10 ° C or less, when a blood modifying agent having a melting point of about 10 ° C or less is used, after excretion by blood, it can be cooled by the ambient temperature, and the blood modifying agent can stably reform the blood.

Further, when the absorbent article is used for a long period of time, the melting point of the blood modifying agent is preferably higher in the range of 45 ° C or lower. Because it is not easily affected by sweat, friction during use, etc., it is not easy to move the blood modifying agent even if it is used for a long time.

When the water solubility is 25 ° C, 0.05 g of the sample is added to 100 g of the deionized water, and allowed to stand for 24 hours. After 24 hours, it is simply stirred as necessary, and it is judged whether or not the sample has a water solubility of 0.05 g or less or not.

Further, in the present specification, in the "dissolution" of the water solubility, the sample is completely dissolved in the deionized water, and the case where the homogeneous mixture is formed and the sample is completely emulsified is included. Further, the term "complete" means a block shape in which no sample is present in the deionized water.

In this technical field, the surface tension of blood is changed, and the blood is rapidly absorbed for the purpose, and the surface of the surface sheet is coated with a surfactant. However, since the surfactant has a high water solubility in general, the surface layer coated with the surfactant is easily mixed with a hydrophilic component (plasma, etc.) in the blood, in other words, has a function of retaining blood in the surface sheet. Propensity. Since the above-mentioned blood modifying agent has a low water solubility, it is different from the conventionally known surfactant, and the blood does not remain in the surface layer sheet, and can be quickly moved to the absorber.

In the present specification, the solubility in 100 g of water at 25 ° C is sometimes referred to only as "water solubility".

The above blood modifying agent may have a water solubility of about 0 g. Therefore, for the above blood modifying agent, the lower limit of the water solubility is about 0 g.

Examples of the blood modifying agent include compounds having the following structures.

(i) a hydrocarbon, (ii) a compound in which at least one carbonyl bond (-CO-) and/or at least one ether bond (-O-) is inserted between CC single bonds of a hydrocarbon, or (iii) a hydrocarbon Between CC single bonds, at least one carbonyl bond (-CO-) and/or at least one ether bond (-O-) are inserted, and at least one hydrogen atom on the hydrocarbon is derived from a carboxyl group (-COOH) or a hydroxyl group (-OH). ) a compound substituted.

In the present specification, the term "hydrocarbon" means a compound composed of carbon and hydrogen, and examples of the chain hydrocarbon include a paraffin-based hydrocarbon (which does not contain a double bond and a ginseng bond, also referred to as an alkane), and an olefin-based hydrocarbon (containing one). a double bond, also known as an olefin), an acetylene hydrocarbon (containing one olefin, also known as an alkyne), and a hydrocarbon containing two or more bonds selected from the group consisting of a double bond and a bond, and a ring Examples of the hydrocarbons include aromatic hydrocarbons and alicyclic hydrocarbons.

As the hydrocarbon, a chain hydrocarbon or an alicyclic hydrocarbon is preferred, and a chain hydrocarbon is preferred, and a paraffinic hydrocarbon, an olefin hydrocarbon, and a hydrocarbon having two or more double bonds (having no reference) are used. More preferred, and paraffinic hydrocarbons are preferred.

The chain hydrocarbons contain a linear hydrocarbon and a branched hydrocarbon.

For the compounds of (ii) and (iii) above, insert 2 or more ethers When the bond (-O-), the ether bond (-O-) does not abut each other. Therefore, the compounds of the above (ii) and (iii) do not contain a compound having a continuous ether bond (so-called peroxide).

Further, in the compound of the above (iii), a compound in which at least one hydrogen atom on a hydrocarbon is substituted by a carboxyl group (-COOH), and a compound in which at least one hydrogen atom on a hydrocarbon is substituted with a hydroxyl group (-OH) is preferred. . As shown in Table 1, the carboxyl group is combined with the metal in the menstrual blood, and the inorganic value 150 is greatly increased to 400 or more. Therefore, the blood modifying agent having a carboxyl group rises to an OB value of about 0.6 at the time of use, and the blood cell is used. Affinity may be reduced.

The above blood modifying agent is preferably a compound having the following structure.

(i') a hydrocarbon, (ii') inserted between at least one carbonyl bond (-CO-), at least one ester bond (-COO-), and at least one carbonate bond (-OCOO) between hydrocarbon single bonds of hydrocarbons -) and / or at least one ether bond (-O-) compound, or (iii') between the hydrocarbon CC single bond, inserted at least one carbonyl bond (-CO-), at least one ester bond (- COO-), at least one carbonate bond (-OCOO-) and/or at least one ether bond (-O-), and at least one hydrogen atom on the hydrocarbon is derived from a carboxyl group (-COOH) or a hydroxyl group (-OH) Substituted compound.

For the compounds of the above (ii') and (iii'), when two or more bonds are inserted, the insertion is selected from a carbonyl bond (-CO-), an ester bond (-COO-), and a carbonate bond (-OCOO). -) When two or more bonds of the ether bond (-O-) are bonded, the bonds are not adjacent to each other, and at least one carbon atom is interposed between the bonds.

More preferably, the above-mentioned blood modifying agent has a carbonyl bond (-CO-) of about 1.8 or less per 10 carbon atoms, an ester bond (-COO-) of 2 or less, and a carbonate bond (-OCOO-) of about 1.5. The following are compounds having an ether bond (-O-) of about 6 or less, a carboxyl group (-COOH) of about 0.8 or less, or a hydroxyl group (-OH) of about 1.2 or less.

More preferably, the blood modifying agent is (A) an ester of a compound having 2 to 4 hydroxyl groups and a compound having one carboxyl group, (B) an ether having a compound having 2 to 4 hydroxyl groups and an ether having a hydroxyl group, (C) an ester of a compound having 2 to 4 carboxyl groups and a compound having 1 hydroxyl group, and (D) a hydrocarbon insertion selected from a carbonyl bond (-CO-), an ester bond (-COO-), a carbonate bond (- a compound of one of OCOO-) and an ether bond (-O-), (E) a poly C ₃ -C ₆ alkanediol, or an alkyl ester or alkyl ether thereof, or (F) a chain hydrocarbon .

The following explains (A) to (F) in detail.

[(A) an ester of a compound having 2 to 4 hydroxyl groups and a compound having 1 carboxyl group]

(A) an ester having a compound having 2 to 4 hydroxyl groups and an ester having a compound having one carboxyl group (hereinafter sometimes referred to as "compound (A)") An ester having a compound having 4, 3 or 2 hydroxyl groups and a compound having one carboxyl group, the above IOB is only in a range having a melting point and a water solubility, and all of the hydroxyl groups need not be esterified.

As the compound having the above 2 to 4 hydroxyl groups, for example, a chain hydrocarbon tetraol, such as an alkanetetraol, such as pentaerythritol, a chain hydrocarbon triol, such as an alkane triol such as glycerin, and a chain hydrocarbon diol such as an alkane Alcohols such as glycols are exemplified. As the compound having the above one carboxyl group, for example, a compound in which one hydrogen atom on a hydrocarbon is substituted by one carboxyl group (-COOH), for example, a fatty acid may be mentioned.

Examples of the compound (A) include an ester of (A ₁ ) chain hydrocarbon tetraol and a fatty acid, an ester of (A ₂ ) chain hydrocarbon triol and a fatty acid, and (A ₃ ) a chain hydrocarbon diol and a fatty acid. Ester.

[(A ₁ ) ester of chain hydrocarbon tetraol with fatty acid]

Examples of the ester of the chain hydrocarbon tetraol and the fatty acid include the following formula (1): Pentaerythritol and a tetraester of a fatty acid, the following formula (2): a pentaerythritol and a fatty acid triester, the following formula (3): a diester of pentaerythritol and a fatty acid, the following formula (4): a monoester of pentaerythritol and a fatty acid.

(wherein, R ¹ to R ^{4 are} each a chain hydrocarbon)

As the fatty acid (R ¹ COOH, R ² COOH, R ³ COOH, and R ⁴ COOH) constituting the ester of pentaerythritol and a fatty acid, the ester of pentaerythritol and a fatty acid may be a component of the above-mentioned IOB, melting point, and water solubility of Manchu, and There is no particular limitation, such as a saturated fatty acid such as a C ₂ - C ₃₀ saturated fatty acid such as acetic acid (C ₂ ) (C ₂ represents a carbon number, which corresponds to the carbon number of R ¹ C, R ² C, R ³ C or R ⁴ , the same as below), propane acid (C ₃ ), butanoic acid (C ₄ ) and isomers thereof, such as 2-methylpropanic acid (C ₄ ), pentanoic acid (C ₅ ) and isomers thereof, For example, 2-methylbutanoic acid (C ₅ ), 2,2-dimethylpropane acid (C ₅ ), hexane acid (C ₆ ), heptanoic acid (C ₇ ), octanoic acid (C ₈ ) And isomers thereof, such as 2-ethylhexane acid (C ₈ ), decanoic acid (C ₉ ), decanoic acid (C ₁₀ ), dodecanoic acid (C ₁₂ ), tetradecanoic acid (C ₁₄ ), palmitic acid (C ₁₆ ), heptadecanoic acid (C ₁₇ ), octadecanoic acid (C ₁₈ ), icosonic acid (C ₂₀ ), behenic acid (C ₂₂ ), twenty-four Acid (C ₂₄ ), hexadecanoic acid (C ₂₆ ), octadecanoic acid (C ₂₈ ), tridecanoic acid (C ₃₀ ), and the like, and these isomers (excluding the above) may be mentioned.

The above fatty acid may be an unsaturated fatty acid. As the above unsaturated fatty acid, for example, a C ₃ - C ₂₀ unsaturated fatty acid such as a monounsaturated fatty acid such as crotonic acid (C ₄ ), myristic acid (C ₁₄ ), palmitoleic acid (C ₁₆ ), oleic acid ( C ₁₈ ), oleic acid (C ₁₈ ), octadecenoic acid (C ₁₈ ), oleic acid (C ₂₀ ), eicosaenoic acid (C ₂₀ ), etc., diunsaturated fatty acids, such as linoleic acid (C ₁₈ ), eicosadienoic acid (C ₂₀ ), etc., triunsaturated fatty acids, such as linolenic acid, such as α-linolenic acid (C ₁₈ ) and γ-linolenic acid (C ₁₈ ), pine acid (C) ₁₈ ), tung oil, such as α-tricoleic acid (C ₁₈ ) and β-tricoleic acid (C ₁₈ ), mead (C ₂₀ ), dihomo-γ-linolenic acid (C ₂₀ ), eicosatrienoic acid (C _20), etc., tetrakis unsaturated fatty acids such as stearidonic acid (C _20), arachidonic acid (C _20), arachidonic acid (C _20), etc., five unsaturated fatty acids, e.g. Examples of the eicosatetraenoic acid (C ₁₈ ), eicosapentaenoic acid (C ₂₀ ), and the like, and some of the hydrogen adducts thereof may be mentioned.

As the ester of the pentaerythritol and the fatty acid, it is preferable to use an ester of pentaerythritol and a fatty acid derived from a saturated fatty acid, that is, an ester of pentaerythritol and a saturated fatty acid, in consideration of modification by oxidation or the like.

Further, as the ester of the pentaerythritol and the fatty acid, the IOB is required to be smaller and more hydrophobic, and a diester, a triester or a tetraester is preferred, a triester or a tetraester is preferred, and a tetraester is preferred.

In the tetraester of the pentaerythritol and the fatty acid, the total number of carbon atoms of the fatty acid constituting the tetraester of pentaerythritol and the fatty acid, that is, the carbon number of the R ¹ C, R ² C, R ³ C and R ⁴ C portions of the above formula (1) The total IOB is 0.60 at 15 o'clock. Therefore, in the tetraester of pentaerythritol and fatty acid, when the total number of carbon atoms is about 15 or more, the requirement of IOB of about 0 to about 0.6 is satisfied.

Among the above tetraesters of pentaerythritol and fatty acids, for example, pentaerythritol, hexane acid (C ₆ ), heptanoic acid (C ₇ ), octanoic acid (C ₈ ), such as 2-ethylhexane acid (C ₈ ), A tetraester of decanoic acid (C ₉ ), decanoic acid (C ₁₀ ) and/or dodecanoic acid (C ₁₂ ) may be mentioned.

In the above-mentioned pentaerythritol and fatty acid triester, the total number of carbon atoms of the fatty acid constituting the trimer of the pentaerythritol and the fatty acid is 19, when the carbon number of the R ¹ C, R ² C and R ³ C portions is 19 in total. The IOB became 0.58. Therefore, in the above-mentioned pentaerythritol and fatty acid triester, when the total carbon number of the fatty acid is about 19 or more, the requirement of IOB of about 0 to about 0.6 is satisfied.

In the diester of the pentaerythritol and the fatty acid, the carbon number of the fatty acid constituting the diester of the pentaerythritol and the fatty acid is a total of, that is, when the carbon number of the R ¹ C and R ² C portions is 22 in the above formula (3), the IOB is 0.59. Therefore, in the diester of the pentaerythritol and the fatty acid, when the total carbon number of the fatty acid is about 22 or more, the requirement of IOB of about 0 to about 0.6 is satisfied.

The monoester of the pentaerythritol and the fatty acid constitutes the fatty acid carbon number of the pentaerythritol and the monoester of the fatty acid, that is, for the above formula (4), when the carbon number of the R ¹ C moiety is 25, the IOB is 0.60. Therefore, in the monoester of the pentaerythritol and the fatty acid, when the carbon number of the fatty acid is about 25 or more, the requirement of IOB of about 0 to about 0.6 is satisfied.

And for the above calculations, the effects of double bonds, reference keys, iso branches, and tert branches are not considered.

As a seller of the above-mentioned esters of pentaerythritol and fatty acids, Yunisuta H-408BRS, H-2408BRS-22 (mixed product), etc. (above, manufactured by Nippon Oil Co., Ltd.) can be mentioned.

[(A ₂ ) ester of chain hydrocarbon triol with fatty acid]

As the ester of the above chain hydrocarbon triol and a fatty acid, for example, the following formula (5): Glycerol and fatty acid triester, the following formula (6): The diester of glycerol and fatty acid, and the following formula (7): (In the formula, R ⁵ to R ^{7 are} each a chain hydrocarbon), a monoester of glycerin and a fatty acid may be mentioned.

The fatty acid (R ⁵ COOH, R ⁶ COOH, and R ⁷ COOH) constituting the ester of the glycerin and the fatty acid, and the ester of the glycerin and the fatty acid are only required to satisfy the requirements of the above IOB, the melting point, and the water solubility, and are not particularly limited. For example, the fatty acids listed in the "(A1) chain hydrocarbon tetraol and fatty acid esters", that is, saturated fatty acids and unsaturated fatty acids, may be exemplified by the possibility of modification by oxidation or the like, from saturated fatty acids. An ester of glycerin and a fatty acid, that is, an ester of glycerin and a saturated fatty acid is preferred.

Further, as the ester of glycerin and a fatty acid, when it is desired to make IOB smaller and more hydrophobic, a diester or a triester is preferred, and a triester is preferred.

The above triglycerides of glycerol and fatty acid are also called triglycerides, such as triesters of glycerol and octanoic acid (C ₈ ), triesters of glycerol and decanoic acid (C ₁₀ ), glycerol and dodecanoic acid (C ₁₂ ) Triesters, and glycerides and triesters of two or three kinds of fatty acids, and mixtures thereof may be mentioned.

As the triester of the above glycerin and two or more kinds of fatty acids, for example, a triester of glycerin and octanoic acid (C ₈ ) and decanoic acid (C ₁₀ ), glycerin and octanoic acid (C ₈ ), and decanoic acid (C) ₁₀ ) and tridecanoic acid (C ₁₂ ) triester, glycerol and octanoic acid (C ₈ ), decanoic acid (C ₁₀ ), dodecanoic acid (C ₁₂ ), tetradecanoic acid (C ₁₄ ) Examples of the triester of palmitic acid (C ₁₆ ) and octadecanoic acid (C ₁₈ ) include the following.

The triglyceride of the glycerin and the fatty acid is such that the melting point is about 45° C. or less, and the carbon number of the fatty acid constituting the triester of glycerin and the fatty acid is total, that is, R ⁵ C, R ⁶ C and R ⁷ C in the formula (5). A part of the total carbon number is preferably about 40 or less.

Further, in the triglyceride of the glycerin and the fatty acid, the carbon number of the fatty acid constituting the triester of glycerin and the fatty acid is total, that is, the total number of carbon atoms of the R ⁵ C, R ⁶ C and R ⁷ C portions in the formula (5) is 12 The IOB becomes 0.60. Therefore, in the above-mentioned triglyceride of glycerin and fatty acid, when the total carbon number of the fatty acid is about 12 or more, the requirement of IOB of about 0 to about 0.6 is satisfied.

The above-mentioned triglyceride of glycerin and fatty acid is a so-called fat, and since it is a component which constitutes a human body, it is preferable from a viewpoint of safety.

As a commercial product of the above-mentioned triglyceride of glycerin and fatty acid, there are three coconut oil fatty acid glycerides, NA36, Panaseate 800, Panasee 800B, and Panasate 810S, and three C2L oil fatty acid glycerides and three CL oil fatty acid glycerides (above, manufactured by Nippon Oil Co., Ltd.) ) can be cited.

The above diglycerides of glycerol and fatty acid are also called diglycerides, such as diesters of glycerol and decanoic acid (C ₁₀ ), diesters of glycerol and dodecanoic acid (C ₁₂ ), glycerol and palmitic acid (C _The diester of ₁₆ ), the diester of glycerin and two kinds of fatty acids, and a mixture thereof may be mentioned.

In the diester of the glycerin and the fatty acid, the carbon number of the fatty acid constituting the diester of glycerin and the fatty acid is a total of, that is, for the formula (6), when the total carbon number of the R ⁵ C and R ⁶ C moieties is 16, the IOB is 0.58. Therefore, in the diester of the glycerin and the fatty acid, when the total carbon number of the fatty acid is about 16 or more, the requirement of IOB of about 0 to about 0.6 is satisfied.

The monoester of the above glycerin and a fatty acid is also called a monoglyceride, for example, a octadecanoic acid (C ₁₈ ) monoester of glycerin, a behenic acid (C ₂₂ ) monoester of glycerin, etc. are mentioned.

In the monoester of the glycerin and the fatty acid, the carbon number of the fatty acid constituting the monoester of glycerin and the fatty acid, that is, for the formula (7), when the carbon number of the R ⁵ C moiety is 19, the IOB is 0.59. Therefore, in the monoester of the above glycerin and fatty acid, when the carbon number of the fatty acid is about 19 or more, the requirement of IOB of about 0 to about 0.6 is satisfied.

[(A ₃ ) ester of chain hydrocarbon diol and fatty acid]

As the ester of the above chain hydrocarbon diol and a fatty acid, for example, a C ₂ -C ₆ chain hydrocarbon diol, such as a C ₂ -C ₆ glycol, such as ethylene glycol, propylene glycol, butylene glycol, pentanediol or Monoesters or diesters of hexanediol and fatty acids are exemplified.

Specifically, as the ester of the chain hydrocarbon diol and the fatty acid, for example, the following formula (8): R ⁸ COOC _k H _2k OCOR ⁹ (8) (wherein k is an integer of 2 to 6, and R ⁸ and R ⁹ is a chain hydrocarbon (C ₂ -C ₆ glycol) and a fatty acid diester, and the following formula (9): R ⁸ COOC _k H _2k OH (9) (wherein k is an integer of 2-6) A monoester of a C ₂ -C ₆ glycol and a fatty acid in which R ⁸ is a chain hydrocarbon) may be mentioned.

Among the above-mentioned esters of C ₂ -C ₆ glycol and fatty acid, as a fatty acid which must be esterified (corresponding to R ⁸ COOH and R ⁹ COOH for formula (8) and formula (9)), if C ₂ ~ C ₆ The ester of an alcohol and a fatty acid may satisfy the above requirements of the IOB, the melting point and the water solubility, and is not particularly limited. For example, the fatty acid listed in the "(A ₁ ) chain hydrocarbon tetraol and fatty acid ester", that is, a saturated fatty acid The unsaturated fatty acid is preferably a saturated fatty acid in consideration of the possibility of modification by oxidation or the like.

In the diester of the butanediol (k=4) and the fatty acid represented by the formula (8), when the total carbon number of the R ⁸ C and R ⁹ C moieties is 6, the IOB is 0.6. Therefore, in the diester of the butanediol (k=4) represented by the formula (8) and the diester of the fatty acid, when the total carbon number is about 6 or more, the requirement that the IOB is from about 0 to about 0.6 is satisfied. Further, in the monoester of ethylene glycol (k=2) and the fatty acid represented by the formula (9), when the carbon number of the R ⁸ C moiety is 12, the IOB is 0.57. Therefore, in the monoester of the ethylene glycol (k=2) and the fatty acid represented by the formula (9), when the carbon number of the fatty acid is about 12 or more, the requirement of IOB of from about 0 to about 0.6 is satisfied.

Examples of the C ₂ ~ C ₆ glycol esters of fatty acids and, considering the possibility of modification performed by oxidation and other saturated fatty acids from C ₂ ~ C ₆ glycol ester of a fatty acid, i.e., C ₂ ~ C ₆ Glycol and saturated fatty acid esters are preferred.

Further, as the ester of the C ₂ -C ₆ glycol and the fatty acid, when the IOB is to be made smaller and further hydrophobic, the ester of the glycol having a large carbon number and the fatty acid, for example, from butanediol, An ester of a glycol or a fatty acid of pentanediol or hexanediol is preferred.

Further, as the ester of the C ₂ -C ₆ glycol and the fatty acid, when the IOB is to be made smaller to make it more hydrophobic, it is preferred to use a diester.

Commercial products such as compole BL and combole BS (manufactured by Nippon Oil Co., Ltd.) and the like are exemplified as the commercial products of the above-mentioned esters of C ₂ to C ₆ glycols and fatty acids.

[(B) an ether having a compound having 2 to 4 hydroxyl groups and a compound having 1 hydroxyl group]

(B) a compound having 2 to 4 hydroxyl groups and an ether having a compound having one hydroxyl group (hereinafter sometimes referred to as "compound (B)") contains a compound having 4, 3 or 2 hydroxyl groups and having The ether of one hydroxy compound has only the above-mentioned range of IOB, melting point and water solubility, and all of the hydroxyl groups may not be etherified.

As a compound having the above 2 to 4 hydroxyl groups,

The ones listed in (A) are, for example, pentaerythritol, glycerin, and glycol.

As the above compound having one hydroxyl group, for example, a compound in which one hydrogen atom of a hydrocarbon may be substituted by one hydroxyl group (-OH), for example, an aliphatic monohydric alcohol, such as a saturated aliphatic monohydric alcohol and an unsaturated aliphatic monohydric alcohol Alcohols can be mentioned.

The saturated aliphatic monohydric alcohol, for example, a C ₁ to C ₂₀ saturated aliphatic monohydric alcohol, for example, methyl alcohol (C ₁ ) (C ₁ represents a carbon number, the same applies hereinafter), ethyl alcohol (C ₂ ), Propyl alcohol (C ₃ ) and isomers thereof, such as isopropyl alcohol (C ₃ ), butyl alcohol (C ₄ ) and isomers thereof, such as sec-butyl alcohol (C ₄ ) and tert-butyl Alcohol (C ₄ ), pentyl alcohol (C ₅ ), hexyl alcohol (C ₆ ), heptyl alcohol (C ₇ ), octyl alcohol (C ₈ ) and isomers thereof, such as 2-ethylhexyl alcohol (C _8), nonyl alcohol (C _9), decyl alcohol (C _10), dodecyl alcohol (C _12), tetradecyl alcohol (C _14), cetyl (C _16), Heptadecyl alcohol (C ₁₇ ), stearyl alcohol (C ₁₈ ), and eicosyl alcohol (C ₂₀ ), and the isomers not enumerated thereof may be mentioned.

In the unsaturated aliphatic monohydric alcohol, one of the CC single bonds of the saturated aliphatic monohydric alcohol is replaced by a C=C double bond, and examples of the oleyl alcohol include, for example, a new Japanese physicochemical company. The purchased Riker series and the An Jieke series.

As the compound (B), for example, an ether of a (B ₁ ) chain hydrocarbon tetraol and an aliphatic monohydric alcohol, for example, a monoether, a diether, a triether, and a tetraether, preferably a diether, a triether, and a tetraether, More preferably, it is a triether and a tetraether, and most preferably an ether of a tetraether, a (B ₂ ) chain hydrocarbon triol and an aliphatic monohydric alcohol, such as a monoether, a diether and a triether, preferably a diether and The triether, more preferably a triether, and an ether of a (B ₃ ) chain hydrocarbon diol and an aliphatic monohydric alcohol, such as a monoether and a diether, and preferably a diether may be mentioned.

As the ether of the chain hydrocarbon tetraol and the aliphatic monohydric alcohol, for example, the following formulas (10) to (13): The formula (wherein R ¹⁰ to R ^{13 are} each a chain hydrocarbon) may be exemplified by pentaerythritol of an aliphatic monohydric alcohol, a triether, a diether, and a monoether.

As the ether of the above chain hydrocarbon triol and the aliphatic monohydric alcohol, for example, the following formulas (14) to (16): The glycerol of the formula (wherein R ¹⁴ to R ^{16 are} each a chain hydrocarbon) and the triether, diether and monoether of the aliphatic monohydric alcohol are exemplified.

The ether of the chain hydrocarbon diol and the aliphatic monohydric alcohol has the following formula (17): R ¹⁷ OC _n H _2n OR ¹⁸ (17) (wherein n is an integer of 2 to 6, and R ¹⁷ and R ^{18 is} each a chain hydrocarbon; a diether of a C ₁ -C ₆ glycol and an aliphatic monohydric alcohol; and the following formula (18): R ¹⁷ OC _n H _2n OH (18) (wherein n is 2 A monoether of C ₂ -C ₆ -glycol and an aliphatic monohydric alcohol of an integer of ~6 and R ¹⁷ is a chain hydrocarbon) may be mentioned.

In the tetraether of the pentaerythritol and the aliphatic monohydric alcohol, the carbon number of the aliphatic monohydric alcohol constituting the tetraether of the pentaerythritol and the aliphatic monohydric alcohol, that is, R ¹⁰ , R ¹¹ , R for the above formula (10) ^{When the} total carbon number of the ¹² and R ¹³ portions is 4, the IOB becomes 0.44. Therefore, in the tetraether of the pentaerythritol and the aliphatic monohydric alcohol, when the total number of carbon atoms of the aliphatic monohydric alcohol is about 4 or more, the requirement of IOB of about 0 to about 0.6 is satisfied.

In the triether of the pentaerythritol and the aliphatic monohydric alcohol, the carbon number of the aliphatic monohydric alcohol constituting the triether of the pentaerythritol and the aliphatic monohydric alcohol is a total of R ¹⁰ , R ¹¹ and R in the above formula (11). ^The total carbon number of the ¹² parts is 9 when the IOB becomes 0.57. Therefore, when the total number of carbon atoms of the aliphatic monohydric alcohol in the above-mentioned pentaerythritol and the aliphatic trihydric alcohol is about 9 or more, the requirement of IOB of about 0 to about 0.6 is satisfied.

In the diether of the pentaerythritol and the aliphatic monohydric alcohol, the total number of carbon atoms of the aliphatic monohydric alcohol constituting the diether of the pentaerythritol and the aliphatic monohydric alcohol is the same as the above formula (12), R ¹⁰ and R ¹¹ When the total carbon number is 15, the IOB becomes 0.60. Therefore, when the total number of carbon atoms of the aliphatic monohydric alcohol in the diether of the pentaerythritol and the aliphatic monohydric alcohol is about 15 or more, the requirement of IOB of about 0 to about 0.6 is satisfied.

In the monoether of the pentaerythritol and the aliphatic monohydric alcohol, the carbon number of the aliphatic monohydric alcohol constituting the monoether of the pentaerythritol and the aliphatic monohydric alcohol, that is, the carbon number of the R ¹⁰ moiety in the above formula (13) is 22 The IOB becomes 0.59. Therefore, in the monoether of the pentaerythritol and the aliphatic monohydric alcohol, when the carbon number of the aliphatic monohydric alcohol is about 22 or more, the requirement of IOB of from about 0 to about 0.6 is satisfied.

Further, in the triether of the glycerin and the aliphatic monohydric alcohol, the carbon number of the aliphatic monohydric alcohol constituting the triether of the glycerin and the aliphatic monohydric alcohol is a total of the formula (14), R ¹⁴ and R ¹⁵ and When the total carbon number of the R ¹⁶ portion is 3, the IOB becomes 0.50. Therefore, when the total carbon number of the aliphatic monohydric alcohol in the triglyceride of the aliphatic glycerol and the aliphatic monohydric alcohol is about 3 or more, the requirement of IOB of about 0 to about 0.6 is satisfied.

In the diether of the glycerin and the aliphatic monohydric alcohol, the carbon number of the aliphatic monohydric alcohol constituting the diether of glycerin and the aliphatic monohydric alcohol, that is, the carbon of the formula (15), R ¹⁴ and R ¹⁵ When the total number is 9, the IOB becomes 0.58. Therefore, when the total carbon number of the aliphatic monohydric alcohol in the diglyceride of the glycerin and the aliphatic monohydric alcohol is about 9 or more, the requirement of IOB of about 0 to about 0.6 is satisfied.

In the monoether of the glycerin and the aliphatic monohydric alcohol, the carbon number of the aliphatic monohydric alcohol constituting the monoether of glycerin and the aliphatic monohydric alcohol, that is, when the carbon number of the R ¹⁴ moiety is 16 for the formula (16) The IOB became 0.58. Therefore, in the monoether of the above glycerin and the aliphatic monohydric alcohol, when the carbon number of the aliphatic monohydric alcohol is about 16 or more, the requirement of IOB of from about 0 to about 0.6 is satisfied.

In the diether of the butanediol (n=4) represented by the formula (17) and the diester of the aliphatic monohydric alcohol, when the total carbon number of the R ¹⁷ and R ¹⁸ moieties is 2, the IOB is 0.33. Therefore, in the diether of the butanediol (n=4) represented by the formula (17) and the diester of the aliphatic monohydric alcohol, when the total carbon number of the aliphatic monohydric alcohol is 2 or more, the requirement of the IOB of about 0 to about 0.6 is satisfied. . Further, in the monoether of ethylene glycol (n = 2) represented by the formula (18) and the aliphatic monohydric alcohol, when the carbon number of the R ¹⁷ moiety is 8, the IOB is 0.60. Therefore, in the monoether of ethylene glycol (n=2) represented by the formula (18) and the aliphatic monohydric alcohol, when the carbon number of the aliphatic monohydric alcohol is about 8 or more, the requirement of IOB of from about 0 to about 0.6 is satisfied.

The compound (B) can be produced by dehydrating and condensing a compound having 2 to 4 hydroxyl groups and a compound having one hydroxyl group such as an aliphatic monohydric alcohol in the presence of an acid catalyst.

[(C) an ester of a compound having 2 to 4 carboxyl groups and a compound having 1 hydroxyl group]

(C) an ester having a compound having 2 to 4 carboxyl groups and an ester having a compound having one hydroxyl group (hereinafter sometimes referred to as "compound (C)") and a compound having 4, 3 or 2 carboxyl groups; An ester of a compound having one hydroxyl group is only in the range of the above IOB, melting point and water solubility, and all of the carboxyl groups need not be esterified.

As the compound having the above 2 to 4 carboxyl groups, for example, a chain hydrocarbon having 2 to 4 carboxyl groups, for example, a chain hydrocarbon dicarboxylic acid such as an alkanedicarboxylic acid such as ethanedioic acid, propane diacid, butane 2 Acid, pentanedioic acid, hexanedioic acid, heptanedioic acid, octanedioic acid, decanedioic acid and decanedioic acid, chain hydrocarbon tricarboxylic acid, such as an alkanetricarboxylic acid, such as propane tricarboxylic acid, Butane triacid, pentane tricarboxylic acid, hexane tricarboxylic acid, heptane triacid, octane tricarboxylic acid, decane tricarboxylic acid and decane tricarboxylic acid, and chain hydrocarbon tetracarboxylic acid, such as an alkane tetracarboxylic acid, for example Butane tetracarboxylic acid, pentanetetracarboxylic acid, hexanetetracarboxylic acid, heptanetetracarboxylic acid, octane tetracarboxylic acid, decanetetracarboxylic acid, and decanetetracarboxylic acid are exemplified.

Further, the compound having the above 2 to 4 carboxyl groups contains a hydroxy acid having 2 to 4 carboxyl groups, and examples thereof include malic acid, tartaric acid, citric acid, isocitric acid, and the like, and an alkoxy group having 2 to 4 carboxyl groups. Examples of the acid, for example, O-acetyl citric acid, and a carboxylic acid having 2 to 4 carboxyl groups.

As the compound having one hydroxyl group, those listed in the item of "compound (B)", for example, an aliphatic monohydric alcohol can be mentioned.

As the compound (C), (C ₁ ) is a chain hydrocarbon tetracarboxylic acid having four carboxyl groups, a hydroxy acid, an alkoxy acid or an ester of a carboxylic acid and an aliphatic monohydric alcohol, such as a monoester, a diester or a triester. a tetraester, preferably a diester, a triester and a tetraester, more preferably a triester and a tetraester, more preferably a tetraester, (C ₂ ) a chain hydrocarbon tricarboxylic acid having three carboxyl groups, a hydroxy acid, An alkoxy acid or an ester of a carboxylic acid with an aliphatic monohydric alcohol, such as a monoester, a diester or a triester, preferably a diester and a triester, more preferably a triester, and (C ₃ ) has two carboxyl groups. The ester of a chain hydrocarbon dicarboxylic acid, a hydroxy acid, an alkoxy acid or a carboxylic acid with an aliphatic monohydric alcohol, for example, a monoester or a diester, is preferably a diester.

Examples of the compound (C) include dioctyl adipate, diisostearyl malate, tributyl citrate, and tributyl butyl acetoate, which are commercially available.

[(D) in the hydrocarbon insertion of any one selected from the group consisting of an ether bond (-O-), a carbonyl bond (-CO-), an ester bond (-COO-), and a carbonate bond (-OCOO-) Compound]

(D) inserting into the hydrocarbon a group selected from the group consisting of an ether bond (-O-), a carbonyl bond (-CO-), an ester bond (-COO-), and a carbonate bond (-OCOO-) One compound (hereinafter sometimes referred to as "compound (D)"), (D ₁ ) an aliphatic monohydric alcohol and an aliphatic monohydric alcohol ether, (D ₂ ) dialkyl ketone, (D ₃ ) fatty acid The ester with an aliphatic monohydric alcohol and the (D ₄ ) dialkyl carbonate are mentioned.

[(D ₁ ) an ether of an aliphatic monohydric alcohol and an aliphatic monohydric alcohol]

The ether of the aliphatic monohydric alcohol and the aliphatic monohydric alcohol has the following formula (19): R ¹⁹ OR ²⁰ (19) (wherein R ¹⁹ and R ^{20 are} each a chain hydrocarbon) The compound is exemplified.

The aliphatic monohydric alcohol constituting the ether (corresponding to R ¹⁹ OH and R ²⁰ OH in the formula (19)), the ether is not particularly limited as long as it satisfies the requirements of the above IOB, melting point and water solubility. For example, the aliphatic monohydric alcohols listed in the item of "compound (B)" can be mentioned.

In the ether of the aliphatic monohydric alcohol and the aliphatic monohydric alcohol, the total number of carbon atoms of the aliphatic monohydric alcohol constituting the ether is that when the total number of carbon atoms in the R ¹⁹ and R ²⁰ moieties is 2 in the above formula (19) Since the IOB becomes 0.50, the above IOB requirement can be satisfied if the total number of carbon atoms is about 2 or more. However, the total carbon number is about 6 and the water solubility is about 2 g, which is also problematic from the viewpoint of vapor pressure. When the water solubility is required to satisfy the requirements of about 0.05 g or less, it is preferred that the total carbon number is about 8 or more.

[(D ₂ ) dialkyl ketone]

The dialkyl ketone has the following formula (20): R ²¹ COR ²² (20) (wherein each of R ²¹ and R ²² is an alkyl group) is exemplified.

In the above dialkyl ketone, when the total number of carbon atoms of R ²¹ and R ²² is 5 and the IOB is 0.54, the total number of carbon atoms is about 5 or more, which satisfies the requirements of the above IOB. However, in the total of the above carbon numbers, the water solubility is a high value of about 2 g. Therefore, in order to satisfy the requirement of water solubility of about 0.05 g or less, it is preferred that the total carbon number is about 8 or more. Further, in consideration of the vapor pressure, the carbon number is preferably about 10 or more, and about 12 or more is preferable.

Further, when the total carbon number is about 8, for example, 5-nonanone has a melting point of about -50 ° C and a vapor pressure of about 230 Pa at 20 ° C.

The above-mentioned dialkyl ketone can be obtained by a known method, for example, by oxidizing a second-stage alcohol with chromic acid or the like by a known method.

[(D ₃ ) ester of fatty acid with aliphatic monohydric alcohol]

The ester of the fatty acid and the aliphatic monohydric alcohol is, for example, the following formula (21): a compound having R ²³ COOR ²⁴ (21) (wherein each of R ²³ and R ²⁴ is a chain hydrocarbon).

The fatty acid constituting the above-mentioned ester (corresponding to R ²³ COOH in the formula (21)), for example, the fatty acid listed in the "(A ₁ ) chain hydrocarbon tetraol and fatty acid ester", that is, a saturated fatty acid or an unsaturated fatty acid It is preferable to use a saturated fatty acid in consideration of the possibility of modification by oxidation or the like. The aliphatic monohydric alcohol constituting the above-mentioned ester (corresponding to R ²⁴ OH for the formula (21)), for example, the aliphatic monohydric alcohol listed in the item of the "compound (B)" can be mentioned.

Further, in the ester of the fatty acid and the aliphatic monohydric alcohol, the carbon number of the fatty acid and the aliphatic monohydric alcohol is the total, that is, for the formula (21), the total number of carbons of the R ²³ C and R ²⁴ portions is 5 when the IOB is In the ester of the above fatty acid and the aliphatic monohydric alcohol, the total number of carbon atoms in the R ²³ C and R ²⁴ moieties is about 5 or more, and the above-mentioned IOB requirement is satisfied. However, for example, in the above-mentioned butyl acetate having a total carbon number of 6, the vapor pressure exceeds a high value of 2000 Pa. Therefore, in consideration of the vapor pressure, it is preferred that the total carbon number is about 12 or more. Further, if the total carbon number is about 11 or more, the requirement of water solubility of about 0.05 g or less can be satisfied.

As an example of the ester of the above fatty acid and an aliphatic monohydric alcohol, for example, an ester of dodecanoic acid (C ₁₂ ) with lauryl alcohol (C ₁₂ ), tetradecanoic acid (C ₁₄ ) and dodecyl alcohol (C ₁₂₎ esters and the like may be mentioned of, as the selling products of esters of fatty acids with aliphatic monohydric alcohols of, for example, ErekutolWE20, and ErekutolWE40 (as above NOF Co., Ltd.) may be mentioned.

[(D ₄ ) dialkyl carbonate]

The dialkyl carbonate has the following formula (22): a compound having R ²⁵ OC(=O)OR ²⁶ (22) (wherein each of R ²⁵ and R ²⁶ is an alkyl group) is exemplified.

In the above dialkyl carbonate, when the total carbon number of R ²⁵ and R ²⁶ is 6, the IOB is 0.57, and when the total carbon number of R ²⁵ and R ²⁶ is about 6 or more, the requirement of IOB is satisfied.

When the water solubility is considered, the total carbon number of R ²⁵ and R ²⁶ is preferably about 7 or more, and about 9 or more is preferable.

The above dialkyl carbonates can be synthesized by the reaction of phosgene with an alcohol, the reaction of a chlorinated acid ester with an alcohol or an alcoholate, and the reaction of silver carbonate with an alkyl iodide, in addition to being commercially available.

[(E) Poly C ₂ ~C ₆ alkanediol, or its ester or ether]

As the above-mentioned poly C ₂ -C ₆ alkanediol, or an ester or ether thereof (hereinafter sometimes referred to as compound (E)), (E ₁ ) poly C ₂ -C ₆ alkanediol, (E ₂ ) poly C ₂ ~C ₆ alkanediol and fatty acid ester, (E ₃ ) poly C ₂ ~ C ₆ alkanediol and aliphatic monohydric alcohol ether, (E ₄ ) poly C ₂ ~ C ₆ alkanediol and chain hydrocarbon An ester of a tetracarboxylic acid, a chain hydrocarbon tricarboxylic acid or a chain hydrocarbon dicarboxylic acid, and (E ₅ ) a poly C ₂ -C ₆ alkanediol with a chain hydrocarbon tetraol, a chain hydrocarbon triol, or a chain The ether of a hydrocarbon diol is mentioned. As explained below.

[(E ₁ )Poly C ₂ ~C ₆ alkanediol]

(E ₁ ) The poly C ₂ -C ₆ alkanediol contains not only a homopolymer of a single glycol but also a copolymer of two or more kinds of glycols and a random polymer. Examples of the glycolic acid include a C ₂ -C ₆ alkanediol, that is, ethylene glycol, propylene glycol, butanediol, pentanediol, or hexanediol. As the above-mentioned glycol species, from the viewpoint of reducing the IOB of the poly C ₂ -C ₆ alkanediol, it is preferred to use propylene glycol, butanediol, pentanediol or hexanediol, and butanediol and pentanediol. Or hexylene glycol is preferred.

In the present specification, the "poly C ₂ -C ₆ alkanediol" is a C ₂ -C ₆ alkanediol, which may be selected from the group consisting of ethylene glycol, propylene glycol, butanediol, pentanediol, and hexanediol. Any of a group of homopolymers, two or more kinds of copolymers selected from the above group, or two or more kinds of random polymers selected from the above group.

When the poly C ₂ -C ₆ alkanediol is a homopolymer, the poly C ₂ -C ₆ alkanediol is represented by the following formula (23): HO-(C _m H _2m O) _n -H (23) .

Further, as a result of the inventors' confirmation, when polyethylene glycol (when the formula (23) corresponds to m=2) is n≧45 (about 2,000 molecular weights), the requirements of the IOB satisfying about 0 to about 0.60 are satisfied. However, even if the molecular weight exceeds 4,000, the water solubility requirement cannot be met. Therefore, considering that (E ₁ ) a poly-C ₂ -C ₆ alkanediol does not contain a homopolymer of ethylene glycol, ethylene glycol as a copolymer with other glycols or a random polymer must be contained in (E) ₁ ) Poly C ₂ ~C ₆ alkanediol.

Therefore, the homopolymer of the formula (23) contains a homopolymer of propylene glycol, butylene glycol, pentanediol or hexanediol.

From the above, it is known that for the formula (23), m is from about 3 to about 6, and from about 4 to about 6 is preferred, and n is 1 or more.

For the above formula (23), the value of n is, for example, an IOB having a poly C ₂ -C ₆ alkanediol of from about 0 to about 0.60, a melting point of about 45 ° C or less, and about 0.05 g or less of 100 g of water for 25 ° C. The value of water solubility.

For example, when the formula (23) is polypropylene glycol (m=3), the IOB is 0.58 at n=12. Therefore, when the formula (23) is polypropylene glycol (m = 3), the requirement of the above IOB is satisfied when m≧ is about 12.

Further, when the formula (21) is polytetramethylene glycol (m = 4), the IOB is 0.57 at n = 7. Therefore, when the formula (23) is polytetramethylene glycol (m=4), The condition of the above IOB is satisfied when n≧ is about 7 o'clock.

From the viewpoints of OB, melting point and water solubility, the weight average molecular weight of the poly C _4-6 alkanediol is preferably from about 200 to about 10,000, more preferably from about 250 to about 8,000, and most preferably from about 250 to about A range of 5,000.

Further, from the viewpoints of OB, melting point and water solubility, the weight average molecular weight of the poly C ₃ alkanediol, i.e., polypropylene glycol, is preferably from about 1,000 to about 10,000, more preferably from about 3,000 to about 8,000, and most preferably A range of about 4,000 to about 5,000. When the weight average molecular weight is less than about 1,000, the water solubility is not satisfied, and the weight average molecular weight is larger, and particularly the absorption speed of the absorber and the whiteness of the surface sheet tend to increase.

As a commercial product of the above poly C ₂ -C ₆ alkanediol, for example, You Youlu (trademark) D-1000, D-1200, D-2000, D-3000, D-4000, PB-500, PB-700 PB-1000 and PB-2000 (above are manufactured by Nippon Oil Co., Ltd.) can be cited.

[(E ₂ ) Poly C ₂ ~ C ₆ alkanediol and ester of fatty acid]

As the ester of the poly C ₂ -C ₆ alkanediol and the fatty acid, there is an OH terminal of the poly C ₂ -C ₆ alkanediol described in the item "(E ₁ ) poly C ₂ -C ₆ alkanediol" One or both of the esterified fatty acids, that is, monoesters and diesters may be mentioned.

For the ester of a poly C ₂ -C ₆ alkanediol and a fatty acid, as a fatty acid which must be esterified, for example, a fatty acid listed as "(A ₁ ) chain hydrocarbon tetraol and a fatty acid ester", that is, a saturated fatty acid or not The saturated fatty acid is preferably a saturated fatty acid in consideration of the possibility of modification by oxidation or the like.

A commercially available product of the above-mentioned ester of a poly C ₃ -C ₆ alkanediol and a fatty acid, for example, WILBRIDE cp9 (manufactured by Nippon Oil Co., Ltd.) can be mentioned.

[(E ₃ ) poly C ₂ ~ C ₆ alkanediol and ether of aliphatic 1 alcohol]

Examples of an ether poly C ₂ ~ C ₆ alkylene glycol and the aliphatic monohydric alcohol, with a "(E ₁₎ a poly C ₂ ~ C ₆ alkylene glycol" is the item described poly C ₂ ~ C ₆ alkanediol One or both of the OH ends may be etherified by an aliphatic monohydric alcohol, and monoethers and diethers may be mentioned.

For the ether of poly C ₂ -C ₆ alkanediol and aliphatic monohydric alcohol, as the aliphatic monohydric alcohol which must be etherified, for example, the aliphatic monohydric alcohol listed in the item "Compound (B)" may be used. Give it.

[(E ₄ ) Poly C ₂ ~ C ₆ alkanediol with ester of chain hydrocarbon tetracarboxylic acid, chain hydrocarbon tricarboxylic acid or chain hydrocarbon dicarboxylic acid]

An ester of the above poly C ₂ -C ₆ alkanediol with a chain hydrocarbon tetracarboxylic acid, a chain hydrocarbon tricarboxylic acid or a chain hydrocarbon dicarboxylic acid, as a poly C ₂ -C ₆ alkanediol which must be esterified, there "(E ₁₎ a poly C ₂ ~ C ₆ alkanediol" item of the described poly C ₂ ~ C ₆ alkanediol include. Further, as a chain hydrocarbon dcarboxylic acid, a chain hydrocarbon tricarboxylic acid, and a chain hydrocarbon dicarboxylic acid which are required to be esterified, there is a description of the item "compound (C)".

The ester of the above poly C ₂ -C ₆ alkanediol with a chain hydrocarbon tetracarboxylic acid, a chain hydrocarbon tricarboxylic acid or a chain hydrocarbon dicarboxylic acid may be obtained by a chain hydrocarbon tetracarboxylic acid or a chain, in addition to being commercially available. The hydrocarbon tricarboxylic acid or the chain hydrocarbon dicarboxylic acid is produced by polycondensing a C ₂ -C ₆ alkanediol under known conditions.

[(E ₅ ) poly C ₂ ~ C ₆ alkanediol and chain hydrocarbon tetraol, chain hydrocarbon triol, or ether of chain hydrocarbon diol]

The above-mentioned poly C ₂ -C ₆ alkanediol and a chain hydrocarbon tetraol, a chain hydrocarbon triol, or a chain hydrocarbon diol are contained as a poly C ₂ -C ₆ alkanediol which must be etherified. (E ₁₎ a poly C ₂ ~ C ₆ alkanediol item "of the described poly C ₂ ~ C ₆ alkanediol include. Further, as a chain hydrocarbon tetraol, a chain hydrocarbon triol, and a chain hydrocarbon diol which are required to be etherified, there are items described as "compound (A)", and examples thereof include pentaerythritol, glycerin, and glycol. .

As a commercial product of the above-mentioned poly C ₂ -C ₆ alkanediol and a chain hydrocarbon tetraol, a chain hydrocarbon triol, or a chain hydrocarbon diol, for example, You Lupu (trademark) 5TP-300KB, and excellent You can mention the European road (trademark) TG-3000 and TG-4000 (made by Nippon Oil Co., Ltd.).

Youlupu (trademark) 5TP-300KB is a compound of pentaerythritol 1 mole condensation polymerization propylene glycol 65 moles and ethylene glycol 5 moles, the IOB is 0.39, the melting point is less than 45 ° C, and the water solubility is less than 0.05. g.

Youyou Ou Lu (trademark) TG-3000 is a compound of 50 moles of condensed propylene glycol in glycerol 1 molar. The IOB is 0.42, the melting point is less than 45 ° C, the water solubility is less than 0.05g, and the weight average molecular weight is About 3,000.

Youyou Ou Lu (trademark) TG-4000 is a compound of glycerol 1 mole condensation propylene glycol 70 mole, the IOB is 0.40, the melting point is less than 45 ° C, the water solubility is less than 0.05g, and the weight average molecular weight is about 4,000.

An ether of the above poly C ₂ -C ₆ alkanediol and a chain hydrocarbon tetraol, a chain hydrocarbon triol, or a chain hydrocarbon diol. Further, it can be produced by subjecting a C ₂ -C ₆ alkanediol to polycondensation under a known condition by a chain hydrocarbon tetraol, a chain hydrocarbon triol or a chain hydrocarbon diol.

[(F) chain hydrocarbon]

The above-mentioned chain hydrocarbon has a minerality value of 0, an IOB of 0, and a water solubility of almost 0 g. Therefore, the above-mentioned blood modifying agent can be contained only in a melting point of about 45 ° C or lower. Examples of the chain hydrocarbons include, for example, a (F ₁ ) chain alkane, for example, a linear alkane or a branched alkane. For example, in the case of a linear alkane, when the melting point is about 45° C. or less, the carbon number is substantially 22 or less. By. Further, in consideration of the vapor pressure, it basically contains a carbon number of 13 or more. In the case of a branched alkane, the number of carbon atoms is 22 or more for the same carbon number because the melting point is lower than the case of the linear alkane. As a commercial product of the above-mentioned hydrocarbon, for example, PARLEAM6 (Nippon Oil Co., Ltd.) can be mentioned.

Although the blood modifying agent described above is discussed in detail at the same time as the examples, it is considered to have a mechanism for lowering blood viscosity and surface tension. The menstrual blood absorbed by the absorbent article is compared with the general blood, and contains proteins such as the endometrial wall, and these blood cells have a function as a link, and it is easy to become a state in which the blood cells are in a string. Therefore, the menstrual blood absorbed by the absorbent article tends to be highly viscous. If the surface layer is non-woven, the menstrual blood tends to block between the fibers, and the wearer tends to feel a sticky feeling, and the menstrual sheet surface diffuses on the surface of the surface sheet. Easy to leak.

In the absorbent article disclosed by the present invention, the surface layer sheet is considered for inclusion The blood modifying agent having a mechanism for lowering blood viscosity and surface tension is not easily blocked by the blood between the fibers of the surface sheet, and the menstrual blood can be quickly moved from the surface sheet to the absorber. Further, in the absorbent article according to the present invention, since the melting point of the blood modifying agent is about 45 ° C or lower, it is liquid or solid at normal temperature (25 ° C), and is in contact with body fluid of about 30 to about 40 ° C. Liquefaction (or liquid), easy to dissolve in body fluids.

Moreover, the blood modifying agent having an IOB of about 0 to about 0.60 has high organicity and is easily buried between the blood cells, so that the blood cells can be stabilized, and the blood cells are not easily formed into a money string structure.

The above-mentioned modifier is capable of stabilizing the blood cells and making the blood cells less likely to form a string structure, so that the absorber easily absorbs menstrual blood. For example, in an acrylic high-absorbent polymer, an absorbent article containing SAP, when the menstrual blood is absorbed, the blood cell of the string covers the surface of the SAP, so that the absorption performance of the SAP is not easily exhibited, but it is stabilized. Blood cells can make SAP's absorption performance easy to play. Moreover, the blood modifying agent having high affinity with red blood cells prevents the red blood cells from being damaged due to the protection of the red blood cell membrane.

The above blood modifying agent preferably has a weight average molecular weight of about 2,000 or less, and preferably has a weight average molecular weight of 1,000 or less. If the weight average molecular weight becomes high, the viscosity of the blood modifying agent is difficult to fall to a viscosity suitable for coating, and it must be diluted with a solvent. Further, if the number average molecular weight is increased, the blood modifying agent is debonded and causes an uncomfortable feeling to the user.

The absorbent article of the above embodiment can be modified as follows.

(1) As shown in Fig. 5(a), the absorbent article 1A is thin on the surface layer. A second sheet 9 may be contained between the sheet 2 and the absorbent body 4. The second sheet 9 is diffused in the plane direction by the menstrual blood of the user discharged from the surface sheet 2, and rapidly absorbs menstrual blood from the skin side surface of the absorber 4, and is used for improving the cushioning property of the absorbent article 1A. In the second sheet 9, a material which is liquid-permeable under hydrophilicity can be used, and for example, woven fabric, non-woven fabric, porous plastic, raised wood pulp or the like can be used.

The second sheet 9 is adhered to the surface sheet 2 and the absorber 4 by using an adhesive such as a hot melt adhesive. Thereby, the surface sheet 2 can be quickly absorbed by the user's menstrual blood and then moved to the absorbent body 4. Further, the surface sheet 60 has a higher weight per unit area, and a material having a higher density can be used for the second sheet 9. Thereby, the menstrual sheet 2 can quickly move the menstrual blood to the second sheet 9.

As shown in FIG. 5(b), a second sheet 9 is provided between the surface sheet 2 and the absorber 4 in the hole of the through hole 10. Thereby, the menstrual blood discharged from the user can be quickly diffused into the entire cavity of the through hole 10, and the menstrual blood can be absorbed by the absorbent body 2 and accelerate the absorption speed.

The blood modifying agent applied to the surface sheet 2 covering the hole of the through hole 10 is moved from the surface sheet 2 to the second sheet 9. Therefore, the blood modifier can be applied to the second sheet 9 by coating the surface layer 2 in the hole of the through hole 10 by applying the blood modifying agent. By applying the blood modifying agent to the second sheet 9 covering the hole in the through hole 10, the menstrual blood immersed in the through hole 10 can be quickly moved from the surface sheet 2 to the absorbent body 4, and is absorbed more quickly in the absorbent body 4. .

One of the embodiments and the modifications may be combined with a plurality. Modifications can also be combined with each other.

The above description is only an example, and the invention is not limited to the above embodiment.

Example

According to the following examples, it was confirmed that the blood modifying agent can reduce the viscosity and surface tension of menstrual blood, and the menstrual sheet 2 can be rapidly moved from the blood layer to the absorbent body 4. The invention is illustrated by the following examples, but the invention is not limited by these examples.

[example 1] [Evaluation of the rate of rewet and the migration speed of the absorber]

Prepare physiological cotton for sale of goods. The sanitary tampon is a surface sheet formed of a hot air non-woven fabric (composite fiber made of polyester and polyethylene terephthalate, basis weight: 35 g/m ² ) treated with a hydrophilic agent, Hot air non-woven fabric (composite fiber made of polyester and polyethylene terephthalate, basis weight: 30g/m ² ), second sheet, wood pulp (basis weight: 150~450g/m ² , center A large number of acrylic acid superabsorbent polymers (basis weight: 15g/m ² ) and an absorbent body containing a toilet paper as a central protrusion, a side sheet treated with a water repellent agent, and a back sheet formed of a polyethylene film Formed by.

The blood modifying agents used in the experiments are listed below.

[(A ₁ ) ester of chain hydrocarbon tetraol with fatty acid]

. Yunisuta H-408BRS, manufactured by Nippon Oil Co., Ltd.

Tetrakilyl tetraethyl 4-ethylhexane

. Yunisuta H-2408BRS-22, manufactured by Nippon Oil Co., Ltd.

Mixture of pentaerythritol tetrakis-2-ethylhexane acid and neopentyl glycol di-2-ethylhexane acid (58:42, weight ratio)

[(A ₂ ) ester of chain hydrocarbon triol with fatty acid]

. Cetiol SB45DEO, manufactured by Cognis Japan Co., Ltd.

Fatty acid is glycerol and fatty acid triester of oleic acid or stearyl acid

. Three C2L oil fatty acid glycerin, manufactured by Nippon Oil Co., Ltd.

C ₈ fatty acid: C ₁₀ fatty acid: C ₁₂ fatty acid contains about glycerol and fatty acid triester in a weight ratio of 37:7:56

. Three CL oil fatty acid glycerin, manufactured by Nippon Oil Co., Ltd.

C ₈ fatty acid and C ₁₂ fatty acid containing glycerol and fatty acid triester in a weight ratio of 44:56

. Panasate 810s, manufactured by Nippon Oil Co., Ltd.

C ₈ fatty acid: C ₁₀ fatty acid contains about glycerol and fatty acid triester in a weight ratio of 85:15

. Panasate800, manufactured by Nippon Oil Co., Ltd.

Fatty acids are octane acid (C ₈ ) glycerol and fatty acid triester

. Panasate800B, manufactured by Nippon Oil Co., Ltd.

Fatty acids are 2-ethyl hexane acid (C ₈ ) glycerol and fatty acid triester

. NA36, made by Nippon Oil Co., Ltd.

C ₁₆ fatty acid: C ₁₈ fatty acid: C ₂₀ fatty acid (containing both saturated and unsaturated fatty acids) contains about glycerol and fatty acid triester in a weight ratio of 5:92:3.

. Three coconut oil fatty acid glycerin, manufactured by Nippon Oil Co., Ltd.

C ₈ fatty acid: C ₁₀ fatty acid: C ₁₂ fatty acid: C ₁₄ fatty acid: C ₁₆ fatty acid (containing both saturated and unsaturated fatty acids) is contained in a weight ratio of 4:8:60:25:3 Glycerol and fatty acid triester

. SOY42, made by Nippon Oil Co., Ltd.

C ₁₄ fatty acids: C ₁₆ fatty acids: C ₁₈ fatty acids: C ₂₀ fatty acids (containing both saturated and unsaturated fatty acids) containing glycerol and fatty acid triesters in a weight ratio of 0.2:11:88:0.8

. Caprylic diglyceride, manufactured by Nippon Oil Co., Ltd.

Fatty acid is a diester of glycerol and fatty acid of octanoic acid

[(A ₃ ) ester of chain hydrocarbon diol and fatty acid]

. compoleBL, made by Nippon Oil Co., Ltd.

Dodecanediol (C ₁₂ ) monoester of butanediol

. compoleBS, made by Nippon Oil Co., Ltd.

Octadecanoic acid (C ₁₈ ) monoester of butanediol

. Yunisuta H-208BRS, made by Nippon Oil Co., Ltd.

Diethyl 2-ethylhexane acid neopentyl glycol

[(C ₃ ) a chain hydrocarbon dicarboxylic acid having two carboxyl groups, a hydroxy acid, an alkoxy acid or an ester of a carboxylic acid and an aliphatic monohydric alcohol]

. Dioctyl adipate, manufactured by Wako Pure Chemical Industries

[(D ₃ ) ester of fatty acid with aliphatic monohydric alcohol]

. Erekutol WE20, manufactured by Nippon Oil Co., Ltd.

Ester of dodecanoic acid (C ₁₂ ) and dodecyl alcohol (C ₁₂ )

. Erekutol WE40, manufactured by Nippon Oil Co., Ltd.

Ester of tetradecanoic acid (C ₁₄ ) and dodecyl alcohol (C ₁₂ )

[(E ₁ )Poly C ₂ ~C ₆ alkanediol]

. Youyou Ou D-1000 (Your Ou Lu is made by Nippon Oil Co., Ltd.)

Polypropylene glycol having a weight average molecular weight of about 1,000

. Youyou Europe Road D-1200

Polypropylene glycol having a weight average molecular weight of about 1,200

. Youyou Europe Road D-3000

Polypropylene glycol having a weight average molecular weight of about 3,000

. Youyou Europe Road D-4000

Polypropylene glycol having a weight average molecular weight of about 4,000

. Youyou Europe Road PB500

Polytetramethylene glycol having a weight average molecular weight of about 500

. Youyou Europe Road PB700

Polyoxybutylene polyoxypropylene glycol having a weight average molecular weight of about 700

. Youyou Europe Road PB1000R Polytetramethylene glycol having a weight average molecular weight of about 1000

[(E ₂ ) Poly C ₂ ~ C ₆ alkanediol and ester of fatty acid]

. WILBRIDEcp9, made by Nippon Oil Co., Ltd.

The OH groups at both ends are polybutanediol having a weight average molecular weight of about 1,100 by esterification with palmitic acid (C ₁₆ ).

[(E ₃ ) poly C ₂ ~ C ₆ alkanediol and ether of fatty acid]

. You Lupu MS-70K, made by Nippon Oil Co., Ltd.

a stearyl ether of polypropylene glycol, a repeating unit of about 15

[(F ₁ )chain alkane]

. PARLEAM6, manufactured by Nippon Oil Co., Ltd.

Copolymerization of isoparaffin, isobutylene and n-butene, followed by hydrogenation of branched hydrocarbons, degree of polymerization: about 5 to about 10

[other]

. NA50, manufactured by Nippon Oil Co., Ltd.

Adding hydrogen to NA36 to reduce the double bond ratio of glycerol and fatty acid from the unsaturated fatty acid of raw materials

. (octanoic acid/capric acid) monoglyceride, manufactured by Nippon Oil Co., Ltd.

Octanoic acid (C ₈ ) and decanoic acid (C ₁₀ ) contain a monoester of glycerol and fatty acid in a weight ratio of 85:15

. Monomuls 90-L2 lauric acid monoglyceride, Cognis Japan shares Limited company

. Youyou Ux HC60, made by Nippon Oil Co., Ltd.

Polyoxyethylene hardened castor oil

. WILBRIDEs 753, polyoxyethylene polyoxypropylene polyoxybutylene glycerol manufactured by Nippon Oil Co., Ltd.

. Isopropyl citrate, Tokyo Chemical Industry Co., Ltd.

. Youyou Road D-400 weight average molecular weight of about 400 polypropylene glycol

. Youyou Ou Road TG-330, made by Nippon Oil Co., Ltd.

Glycerol ether of polypropylene glycol, repeating unit of about 6, weight average molecular weight: about 330

. You Youou Road TG-1000, made by Nippon Oil Co., Ltd.

Glycerol ether of polypropylene glycol, repeating unit of about 16, weight average molecular weight: about 1000

. You Lupu DGP-700, made by Nippon Oil Co., Ltd.

Diglycerol ether of polypropylene glycol, repeating unit of about 9, weight average molecular weight: about 700

. PEG1500, made by Nippon Oil Co., Ltd.

Polyethylene glycol having a weight average molecular weight of from about 1,500 to about 1,600

. Non-ionic S-6, manufactured by Nippon Oil Co., Ltd.

Polyoxyethylene monostearate, repeat unit of about 7, weight average molecular weight: about 600

. Vaseline, made by CognisJapan Co., Ltd.

Hydrocarbons, semi-solids from petroleum

The IOB, melting point and water solubility of the above samples are shown in Table 2.

Further, the water solubility was measured by the above method, and 20.0 g of 100 g of desalted water was added, and the sample dissolved after 24 hours was evaluated as "20 g <", and 0.05 g of 100 g of demineralized water was dissolved, but 1.00 g was not dissolved. The sample was evaluated to be 0.05 to 1.00 g.

Further, regarding the melting point, "<45" means that the melting point is less than 45 °C.

The skin contact surface of the surface sheet of the above sanitary napkin is coated with the above blood modifying agent. When each blood modifying agent is liquid at room temperature, the following coating is directly performed. If the blood modifying agent is solid at room temperature, it is heated to a melting point of +20 ° C, and secondly, the control slit HMA is used. The gun was micronized with each blood modifying agent and applied to the skin contact surface of the topsheet to a basis weight of about 5 g/m ² .

For Example 1, the range of the surface layer containing the blood modifying agent is shown in FIG. As shown in Fig. 6, in the example 1, the surface layer sheet 220 of the sanitary napkin 200 contains almost all of the blood modifying agent, which is the blood modifying agent containing region 240. And with respect to Figure 6, reference numeral 230 denotes a press section.

Fig. 7 is an electron micrograph of the skin contact surface of the surface sheet in the sanitary napkin (No. 5) containing the three C2L oil fatty acid glycerin in the surface layer. As can be seen from Fig. 7, the tri-C2L oil fatty acid glyceride is present on the surface of the fiber in the form of fine particles.

[experiment method]

On the surface sheet containing each blood modifying agent, place an acrylic plate with holes (200mm × 100mm, 125g, open 40mm × 10mm in the center) From the above hole, 37±1°C of horse EDTA blood (in the blood of the horse and preventing condensation, adding ethyldiaminetetraacetic acid (hereinafter referred to as "EDTA")) 3g, using a microdrop The tube was instilled (first time), and after 1 minute, 3 g of horse EDTA blood at 37 ± 1 ° C was dropped from the hole of the acrylic plate and dropped again with a micropipette (second time).

Immediately after the second blood drop, the acrylic plate was taken out, and 10 pieces of filter paper (50 mm × 35 mm) were placed in the place where the blood was dropped, and the weight was placed thereon to a pressure of 30 g/cm ² . After 1 minute, the filter paper was taken out, and the "reverse bleed rate" was calculated by the following formula.

Infiltration rate (%) = 100 × (quality of filter paper after test - original filter paper quality) / 6

In addition to the evaluation of the rewet rate, the "absorbent migration speed" of the time when the blood moves from the surface sheet to the absorber after the second blood instillation is measured. The absorption speed of the absorbent body indicates the time from when the absorbent body is put into the blood, and the redness of blood is not observed on the surface and inside of the surface sheet.

The results of the rewet rate and the moving speed of the absorbent body are shown in Table 2 below.

Moreover, the whiteness of the skin contact surface of the surface sheet after the test of the migration speed of the absorber was visually evaluated based on the following criteria.

◎: The redness of the blood has almost no residue, and it is impossible to distinguish between the place where the blood exists and the place where it does not exist.

○: Although some red blood remains, it is not easy to distinguish between the place where the blood exists and the place where it does not exist.

△: There is a redness of some blood remaining, and the blood is known. local

×: The results of the combination of the redness of the blood and the direct residue are shown in Table 2 below.

When there is no blood modifying agent, the re-infiltration rate is 22.7%, and the migration speed of the absorbent body exceeds 60 seconds, the osmosis rate of glycerol and fatty acid triester is 7.0% or less, and the migration speed of the absorbent body is 8 seconds or less. Therefore, it is known that the absorption performance can be greatly improved. However, in the triester of glycerin and fatty acid, the NA50 having a melting point exceeding 45 ° C did not show a significant improvement in the absorption performance.

Similarly, in a blood modifying agent having an IOB of about 0 to about 0.60, a melting point of about 45 ° C or less, and a water solubility of about 0.05 g or less for 100 g of water at 25 ° C, a large absorption property is known. improve.

Next, after the physiological sanitary napkins of No. 1 to 42 are used by the subjects of the plural volunteers, the physiological sanitary napkins containing the blood modifying agents of No. 1 to 28 are obtained in the surface sheets even after absorption of menstrual blood. There is no sticky feeling, and the surface sheet is also refreshing. In particular, a significant difference was obtained between these and the sanitary napkins of No. 29, 32, 39, 41 and 42.

Further, in the sanitary napkin of No. 1 to 28, in particular, the physiological sanitary napkin containing the blood modifying agent of No. 1 to 11, 15 to 18 and 28 is subjected to skin contact for absorbing surface layer of menstrual blood. The face is not dyed red by the blood, and the answer is less uncomfortable.

[Example 2]

The above-mentioned rewet rate is evaluated for various blood types of animals. The blood used in the experiment is as follows.

[Animal species]

(1) Human

(2) Horse

(3) sheep

[blood species]

. Defibration: After blood collection, stir the glass beads in a triangular beaker for about 5 minutes.

. EDTA blood: Add 12% EDTA to venous blood 65mL. 2K physiological saline solution 0.5mL

[Division]

Serum or plasma: clear liquid after centrifugation of each defibrinated blood or EDTA blood at room temperature for about 10 minutes at about 1900G

Blood cells: serum is removed from the blood, and the residue is washed twice with phosphate buffered physiological saline solution (PBS), followed by addition of the serum fraction of the phosphate buffered physiological saline solution.

An absorbent article was produced in the same manner as in Example 1 except that the tri-C2L oil fatty acid glycerin was applied to a basis weight of about 5 g/m ² , and the rewet ratio of each of the above blood was evaluated. The measurement of each blood was performed 3 times, and the average value was used.

The results are shown in Table 3 below.

The same tendency as the horse EDTA blood obtained in Example 1 was also obtained in the blood of humans and sheep. Moreover, the same tendency was observed for defibrinated blood and EDTA blood.

[Example 3] [Evaluation of blood retention]

The blood retention of the surface layer containing the blood modifying agent and the surface layer containing no blood modifying agent was evaluated.

[experiment method]

(1) Three C2L oil fatty acids on the skin contact surface of a surface sheet formed of hot air non-woven fabric (composite fiber composed of polyester and polyethylene terephthalate, basis weight: 35 g/m ² ) The glyceride was micronized using a controlled slit HMA gun and applied to a basis weight of about 5 g/m ² . Further, for comparison, a person who has not applied tri C2L oil fatty acid glycerin is prepared. Next, both the surface sheet coated with the tri-C2L oil fatty acid glycerin and the uncoated top sheet were cut into a size of 0.2 g, and the mass (a) of the cell filter surface sheet was accurately measured.

(2) About 2 mL of horse EDTA blood was added from the skin contact surface side and left to stand for 1 minute.

(3) The cell filter is placed in a centrifuge tube and stopped to remove excess horse EDTA blood.

(4) The weight (b) of the surface layer containing the cell filter + horse EDTA blood was measured.

(5) The initial absorption amount (g) per 1 g of the surface sheet was calculated according to the following formula.

Initial absorption = [weight (b) - weight (a)] / 0.2

(6) The cell filter was again placed in a centrifuge tube, and centrifuged at about 1200 G for 1 minute at room temperature.

(7) The weight (c) of the surface layer containing the cell filter + horse EDTA blood was measured.

(8) Calculate the amount of absorption per 1 g of the surface sheet according to the following formula (g).

Absorption after test = [weight (c) - weight (a)] / 0.2

(9) The blood retention rate (%) was calculated according to the following formula.

Blood retention rate (%) = 100 × absorption after test / initial absorption

Further, the measurement was performed three times, and the average value was used.

The results are shown in Table 4 below.

It means that the surface layer containing the blood modifying agent has low blood retention property and can be quickly moved to the absorber after absorbing blood.

[Example 4] [Adhesion of blood containing blood modifying agent]

The blood viscosity of the blood modifying agent was measured using a Rheometric Expansion System ARES (Rheometric Scientific, Inc). 2% by mass of Panasate 810s was added to the horse's fiber, and the sample was formed by gently stirring, and the sample was placed on a parallel plate having a diameter of 50 mm, and the interval was set to 100 μm, and the viscosity was measured at 37 ± 0.5 °C. On the parallel plate, the sample was not evenly sheared, but the average shear rate displayed by the machine was 10 s ^-1 .

The viscosity of the horse hair fiber containing 2% by mass of Panasate 810s is 5.9 mPa. s, on the other hand, the viscosity of the horse-defibrinated blood without the blood modifying agent is 50.4 mPa. s. Therefore, the horse defibrinated blood containing 2% by mass of Panasate 810s was found to have a viscosity of about 90% lower than that of the case where no blood modifying agent was contained.

The blood contains components such as blood cells and is known to have thixotropic properties. However, the blood modifying agent disclosed in the present invention can lower the viscosity of blood in a low viscosity region. By lowering the viscosity of the blood, the absorbed menstrual blood can be quickly moved from the surface sheet to the absorber.

Since the blood modifying agent can rapidly move the absorbed menstrual blood from the surface layer to the absorber, the blood modifying agent is added to the horse defibrin blood by 2% by mass, and the measurement is performed at 37 ° C and a shearing speed of 10 s ^-1 . At the viscosity, the viscosity of the above-mentioned horse-drawn fiber blood is preferably reduced to at least 50% compared with that before the addition, at least to 60% is preferred, at least to 70% is better, at least to 80% is the most good.

[Example 5] [Micrograph of blood containing blood modifying agent]

On the cling film, the menstrual blood of the volunteers was taken, and in one part, the concentration of Panaseate 810s to Panaseate 810s dispersed in 10 times of the phosphate buffered physiological saline was added in an amount of 1% by mass. Blood drop Cover the slides, cover the coverslips, and observe the state of the red blood cells with an optical microscope. A microscope photograph of menstrual blood containing no blood modifying agent is shown in Fig. 8(a), and a microscope photograph of menstrual blood containing Panasate 810s is shown in Fig. 8(b).

As can be seen from Fig. 8, in the menstrual blood containing no blood modifying agent, red blood cells form aggregates such as strings, but in the menstrual blood containing Panasate 810s, the red blood cells are stably dispersed. Therefore, the blood modifying agent exhibits the function of stabilizing red blood cells in the blood.

[Example 6] [Surface tension of blood containing blood modifying agent]

The surface tension of the blood containing the blood modifying agent was measured by a pendant method using a contact angle meter Drop Master 500 manufactured by Kyowa Interface Science Co., Ltd. The surface tension is a blood modifying agent added to the defibrinated blood of the sheep, and is measured after being sufficiently vibrated.

The measurement was performed automatically by a machine, and the density γ was obtained by the following formula (refer to FIG. 9).

γ=g×ρ×(de) ² ×1/H

g: gravity constant

1/H: Correction obtained by ds/de

ρ: density

De: maximum diameter

Ds: diameter by which the drop end is only raised

The density ρ is measured at the temperature shown in Table 5 in accordance with the 5. Vibration Density Test Method of "Density Test Method and Density, Mass, Capacity Conversion Table" of JIS K 2249-1995.

The measurement was performed using DA-505 of Kyoto Electronics Industry Co., Ltd.

The results are shown in Table 5 below.

As is clear from Table 5, the blood modifying agent has a water solubility of 0.05 g or less for 100 g of water at 25 ° C, and the solubility in water is extremely low, and the surface tension of blood can be lowered.

By lowering the surface tension of the blood, the absorbed blood is not held between the fibers of the surface sheet, and can be quickly moved to the absorber.

1,1A‧‧‧Absorbent articles

2‧‧‧Skin sheet

3‧‧‧Back sheet

4‧‧‧Acceptor

5‧‧‧Side sheet

6‧‧‧ Body Department

7‧‧‧Wings

8‧‧‧ Blood Modifier Coating Area

9‧‧‧Second sheet

10‧‧‧through holes

11, 12‧‧‧ Sealing Department

13,14‧‧‧Adhesive

120‧‧‧ pattern drum

130‧‧‧Surface sheet roll

140‧‧‧through hole forming device

200‧‧‧Physical sanitary napkins

Fig. 1 Fig. 1 is a partially broken plan view showing an absorbent article according to an embodiment of the present invention.

Fig. 2 Fig. 2(a) is a schematic cross-sectional view showing the A-A broken plane of Fig. 1, and Fig. 2(b) is a cross-sectional view showing the through hole pattern of the absorbent article according to the embodiment of the present invention.

Fig. 3 Fig. 3 is a plan view showing an absorbent body of an absorbent article according to an embodiment of the present invention.

Fig. 4 Fig. 4 is a view for explaining an example of a method of forming a through hole in a surface sheet and an absorber.

Fig. 5 Fig. 5(a) is a schematic cross-sectional view showing a modification of the absorbent article according to the embodiment of the present invention, and Fig. 5(b) is a schematic cross-sectional view showing the through hole of the modification.

Fig. 6 Fig. 6 is a view showing the range of the surface layer containing the blood modifying agent in Example 1.

Fig. 7 Fig. 7 is an electron micrograph of the skin contact surface of the surface sheet in the sanitary napkin containing the three C2L oil fatty acid glycerin in the surface layer.

Figure 8 Figure 8 is a photomicrograph of a menstrual blood with or without a blood modifying agent.

Fig. 9 Fig. 9 is a view for explaining a method of measuring surface tension.

1‧‧‧Absorbables

2‧‧‧Skin sheet

3‧‧‧Back sheet

4‧‧‧Acceptor

5‧‧‧Side sheet

6‧‧‧ Body Department

7‧‧‧Wings

8‧‧‧ Blood Modifier Coating Area

10‧‧‧through holes

11, 12‧‧‧ Sealing Department

Claims (10)

An absorbent article comprising a liquid-permeable surface sheet disposed on the skin side, a liquid-impermeable back sheet disposed on the garment side, and a surface layer interposed between the surface sheet and the back sheet An absorbent article for a liquid-retaining absorbent body that penetrates a hole between the side surface of the garment, wherein the surface layer sheet is a layer covering the through hole of the absorbent body and covering the surface layer of the through hole. The blood modifying agent is applied, and the blood modifying agent has an IOB of 0 to 0.60, a melting point of 45 ° C or less, and a water solubility of 0.05 g or less of 100 g of water at 25 ° C. The absorbent article according to claim 1, wherein a second sheet is further provided between the surface sheet and the absorbent body in the hole of the through hole of the absorbent body, and the blood modifying agent is applied to The aforementioned second sheet. The absorbent article according to claim 1 or 2, wherein the number of the through holes per 1 cm ² of the skin side surface of the absorbent body is 1 to 10. The absorbent article according to claim 1 or 2, wherein the opening of the through hole of the absorbent body has an opening area of 0.01 to 10 mm ² . The absorbent article of claim 1 or 2, wherein the blood modifying agent is (i) a hydrocarbon, (ii) between C-C single bonds of a hydrocarbon, and at least one carbonyl bond is inserted (-CO- And/or at least one compound of an ether bond (-O-), or (iii) intercalated with at least one carbonyl bond (-CO-) and/or at least one ether bond between the CC single bonds of the hydrocarbon (- O-), and at least one hydrogen atom on the hydrocarbon is a compound substituted with a carboxyl group (-COOH) or a hydroxyl group (-OH), wherein when two or more ether bonds are inserted for the compound of (ii) or (iii) The ether bonds are not adjacent to each other. The absorbent article of claim 1 or 2, wherein the blood modifying agent is (i') hydrocarbon, (ii') is inserted between CC single bonds of hydrocarbons, and at least one carbonyl bond is inserted (-CO) -), at least one ester bond (-COO-), at least one carbonate bond (-OCOO-) and/or at least one ether bond (-O-) compound, or (iii') hydrocarbon CC Between the single bonds, at least one carbonyl bond (-CO-), at least one ester bond (-COO-), at least one carbonate bond (-OCOO-), and/or at least one ether bond (-O-) are inserted. And a compound in which at least one hydrogen atom on the hydrocarbon is substituted with a carboxyl group (-COOH) or a hydroxyl group (-OH), wherein two or more bonds are inserted for the compound of (ii') or (iii') At the time of knotting, the bonds do not abut. The absorbent article according to claim 1 or 2, wherein the blood modifying agent has a carbonyl bond (-CO-) of 1.8 or less and an ester bond (-COO) per 10 carbon atoms in the hydrocarbon. -) 2 or less, 1.5 or less carbonate bonds (-OCOO-), 6 or less ether bonds (-O-), 0.8 or less carboxyl groups (-COOH), and/or 1.2 or less hydroxyl groups (-OH) Compound. The absorbent article according to claim 1 or 2, wherein the blood modifying agent is (A) an ester having a compound having 2 to 4 hydroxyl groups and a compound having one carboxyl group, and (B) having 2~ An ether of a compound having 4 hydroxyl groups and a compound having 1 hydroxyl group, (C) an ester of a compound having 2 to 4 carboxyl groups and a compound having 1 hydroxyl group, and (D) a hydrocarbon insertion selected from an ether bond (-O- a compound of any one of a group consisting of a carbonyl bond (-CO-), an ester bond (-COO-), and a carbonate bond (-OCOO-), (E) a poly C ₂ -C ₆ alkanediol, Or its ester or ether, or (F) chain hydrocarbon. The absorbent article according to claim 1 or 2, wherein the blood modifying agent is an ester selected from the group consisting of (A ₁ ) chain hydrocarbon tetraol and fatty acid, (A ₂ ) chain hydrocarbon triol and fatty acid Ester, (A ₃ ) chain hydrocarbon diol and fatty acid ester, (B ₁ ) chain hydrocarbon tetraol and aliphatic monohydric alcohol ether, (B ₂ ) chain hydrocarbon triol and aliphatic monohydric alcohol Ether, (B ₃ ) chain hydrocarbon diol and aliphatic monohydric alcohol ether, (C ₁ ) chain hydrocarbon tetracarboxylic acid having 4 carboxyl groups, hydroxy acid, alkoxy acid or carboxylic acid and aliphatic 1 An ester of a diol, (C ₂ ) a chain hydrocarbon tricarboxylic acid having three carboxyl groups, a hydroxy acid, an alkoxy acid or an ester of a carboxylic acid and an aliphatic monohydric alcohol, and (C ₃ ) having a chain of two carboxyl groups a hydrocarbon dicarboxylic acid, a hydroxy acid, an alkoxy acid or an ester of a carboxylic acid and an aliphatic monohydric alcohol, (D ₁ ) an aliphatic monohydric alcohol and an aliphatic monohydric alcohol ether, (D ₂ ) dialkyl ketone, ( D ₃ ) ester of fatty acid with aliphatic monohydric alcohol, (D ₄ ) dialkyl carbonate, (E ₁ ) poly C ₂ ~ C ₆ alkanediol, (E ₂ ) poly C ₂ ~ C ₆ alkanediol Ester with fatty acid, (E ₃ ) poly C ₂ ~ C ₆ alkanediol and aliphatic monohydric alcohol ether, (E ₄ ) poly C ₂ ~ C ₆ alkanediol and chain hydrocarbon tetracarboxylic acid, chain hydrocarbon Esters of carboxylic acid or dicarboxylic acid of chain hydrocarbon, (E ₅₎ poly C ₂ ~ C ₆ alkylene glycol and a chain hydrocarbon tetraol, chain hydrocarbon triol or chain hydrocarbon diol of ether, and (F ₁ ) A group of chain alkanes. The absorbent article according to claim 1 or 2, wherein the blood modifying agent has a weight average molecular weight of 2,000 or less.