TWI572344B - Absorbent items - Google Patents

Description

Absorbent article

The present invention relates to absorbent articles for sanitary napkins, sanitary pads, disposable diapers, incontinence pads, incontinence pads and the like.

A general absorbent article comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body provided between the top sheet and the back sheet, and the liquid permeated from the top sheet is absorbed and retained by the absorbent body. However, in the pursuit of preventing deformation of the absorbent article, the absorbent body is excessively compressed and absorbed by the absorbent body. The retained liquid flows back against the top sheet to leak (reverse).

As one of the efforts, it is proposed to form a plurality of slits extending through the top sheet extending when the top sheet is formed in a non-tension state when the top sheet is in a non-tension state, and the top sheet is subjected to tension (Patent Document 1).

However, the absorbent article described in Patent Document 1 absorbs the liquid excrement of the user and receives tension when the user is in use. The slit opening formed by the top sheet and the absorber are exposed, and the exposed absorber is exposed. Contact with the user's skin, giving the user a sticky feeling and unpleasantness sense.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Publication No. 2002-528174

The present invention has an object of providing a novel absorbent article which prevents excessive compression of the absorbent body due to deformation of the absorbent article and reversal thereof.

In order to solve the above problems, the present invention provides an absorbent article comprising an absorbent body provided between a liquid permeable sheet, a liquid impervious sheet, a liquid permeable sheet, and a liquid impervious sheet, wherein the liquid permeable sheet has a liquid receiving property. The supplied liquid is supplied to the field, and is located in the peripheral area of the periphery of the liquid supply area, and forms a stretchable field having an extensible snake abdomen and a flexible field surrounding the stretchable field in the liquid supply field. Between the liquid supply region and the absorber, a first adhesive layer that allows the liquid to be supplied and the absorber to be peeled off is formed, or an adhesive layer is not formed, and a ratio between the peripheral region and the absorber is formed. The subsequent layer is followed by an absorbent article of a second adhesive layer having a high strength.

In the absorbent article of the present invention, when the liquid of the liquid permeable sheet is bent in the field of supply and convexly deformed toward the liquid supply region, the following effects are exhibited.

When a liquid is supplied between the liquid supply region and the absorber to form a first adhesive layer in which the liquid is supplied and the absorbent body is peelable, the first adhesive layer is passed through the first adhesive layer during the convex deformation of the absorbent article. The liquid is stripped from the absorbent body and the liquid is stretched in the stretchable field of the supply field. Similarly, in the case where the adhesive layer is not formed between the liquid supply region and the absorber, the liquid is stretched in the stretchable field of the supply field. Therefore, the absorbent body becomes less susceptible to being squeezed by the liquid supply region, and the excessive compression of the absorbent body due to the deformation of the absorbent article and the rewet accompanying thereof are prevented.

In particular, in the periphery of the liquid supply region, there is a peripheral region in which the second adhesive layer having a higher strength than the first adhesive layer is adhered to the absorber, and the stretchable region in the liquid supply region is easily stretched away from the absorber. . Therefore, it is possible to effectively prevent excessive compression of the absorbent body due to deformation of the absorbent article and accompanying back rewet.

Further, in the case where the absorbent article of the present invention is deformed while changing the bending angle (for example, when the wearer of the absorbent article changes posture, the bending angle of the absorbent article becomes a corner or an obtuse angle), The elastic restoring force (rebounding force) in the flexible field, the liquid permeable sheet is easily deformed by the deformation of the absorbent article, so that the deflection and the deflected sheet of the liquid permeable sheet are prevented from adhering to the skin.

According to the present invention, there is provided a novel absorbent article which prevents excessive compression of the absorbent body due to deformation of the absorbent article and reversal thereof.

1‧‧‧Physical sanitary napkins (absorbent articles)

2‧‧‧Top sheet (liquid permeable sheet)

3‧‧‧ Back sheet (liquid impervious sheet)

4‧‧‧Acceptor

20a‧‧‧Excretion is supplied to the field (liquid supply field)

20b‧‧‧ peripheral areas

21‧‧‧Extension field

22‧‧‧Flexible field

210‧‧‧ snake belly

Fig. 1 is a plan view showing a sanitary napkin according to an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view showing a section taken along line A-A of Fig. 1.

Fig. 3 is a partial cross-sectional perspective view showing a field of stretchability and a field of flexibility of a top sheet in a sanitary napkin according to an embodiment of the present invention.

Fig. 4 is a perspective view showing a sanitary napkin according to an embodiment of the present invention in a convex shape.

Fig. 5 is a view for explaining a method of manufacturing a sanitary napkin according to an embodiment of the present invention.

Fig. 6 is a view for explaining a recess forming roller used for the production of the sanitary napkin according to the embodiment of the present invention.

Fig. 7 is a view for explaining a field in which a concave portion is formed by a concave portion forming roller in a top sheet.

Fig. 8 is a view for explaining an upper roll of an extended tooth roll used for the production of the sanitary napkin according to the embodiment of the present invention.

Fig. 9 is a view for explaining a lower roll of an extended tooth roll used for the production of the sanitary napkin according to the embodiment of the present invention.

Fig. 10 is a view for explaining a top sheet extending with an extending tooth roll.

Fig. 11 is an electron micrograph of the skin contact surface of the top sheet in the sanitary napkin of the top sheet containing the tri-C2L oil fatty acid glyceride.

Fig. 12 is a photomicrograph of menstrual blood with or without a blood modifying agent.

Fig. 13 is a view for explaining a method of measuring surface tension.

[Best Mode for Carrying Out the Invention]

Hereinafter, the absorbent article of the present invention will be described.

In the absorbent article of the present invention, the liquid supply region is preferably set in the field of the liquid permeable sheet in accordance with the type and use of the absorbent article, and is set in the position, area, etc. of the liquid supply region of the liquid permeable sheet. Special restrictions. The liquid is supplied to the field, and may be set to be slightly in the same field as the liquid supply field or set to be larger than this, but it is preferable to set it to be larger than the liquid supply field from the viewpoint of preventing liquid from oozing out to the outside.

In the absorbent article of the present invention, the field of stretchability is an area which is stretchable by the stretching of the snake abdomen. The snake abdomen has a repeating structure of a mountain fold portion and a valley fold portion, and the liquid forming the snake belly can be stretched in the surface direction and the thickness direction of the supply field. In addition to stretchability, the snake's abdomen can also have contractility. However, even if the snake's abdomen has contraction, the material of the snake's abdomen, snake The number of the abdomen is equal to the case where the snake's abdomen does not completely contract to the original state and maintains a slightly extended state than the original state.

In the absorbent article of the present invention, the field of flexibility is a field having an elastic restoring force (rebounding force) for deformation. Although the flexible field can be stretched by the force applied during deformation, it is preferable that the elastic restoring force against deformation is substantially not stretched by the force applied during deformation.

In the absorbent article of the present invention, the flexible field surrounds all or part of the surrounding area of the stretchable field. In the case of the convex deformation of the absorbent article, from the viewpoint of elastic resilience in the field of flexibility in which the stretching of the absorbent body is prevented from being excessively compressed and the deflection of the liquid permeable sheet is prevented, the flexible field is 30~100% of the surrounding area surrounding the stretchable area is better, surrounded by 50~100%, and surrounded by 100%.

In the absorbent article of the present invention, in the field of stretchability in which a plurality of stretchable snake abdomen is formed in the liquid supply field, it is preferable that the flexible field surrounds each stretchable field (Section 1). In the first aspect, in the case of the convex deformation of the absorbent article, the elastic restoring force in the flexible field in which the stretching of the absorbent body is prevented from being excessively compressed and the deflection of the liquid permeable sheet is prevented is effectively produced.

In the first aspect, the flexible region is formed into a mesh shape, and the stretch region is formed inside each mesh (see Fig. 2). In the second aspect, in the case of the convex deformation of the absorbent article, in order to effectively generate the elastic restoring force in the flexible field in which the stretching of the absorbent body is prevented from being excessively compressed and the deflection of the liquid permeable sheet is prevented, There are a number of stretchable areas and flexible areas surrounding the various stretch areas.

In the second aspect, the flexible field has a slightly linear first field extending in the direction intersecting the longitudinal direction of the absorbent article, and is arranged in parallel with the first field, and is slightly parallel to the first field. The second field in a slightly linear shape arranged in parallel is preferable (Stage 3). In the third aspect, in the case of the convex deformation of the absorbent article, in order to effectively generate the elastic restoring force in the flexible field in which the stretching of the absorbent body is prevented from being excessively compressed and the deflection of the liquid permeable sheet is prevented, There is a mesh-like flexible field.

In the absorbent article of the present invention, the snake abdomen has a mountain fold portion and a valley portion which are extended in the longitudinal direction of the absorbent article and arranged in the width direction of the absorbent article, and have a wavy cross section along the width direction. It is better (state 4). In the aspect 4, when the absorbent article is bent along the longitudinal direction thereof and convexly deformed toward the liquid supply region, the snake belly is stretched in the width direction and the thickness direction of the absorbent article, thereby effectively preventing the absorption body caused by the convex deformation. Excessive compression and accompanying it.

In the absorbent article of the present invention, the liquid permeation hole is formed in the stretchable region, and the liquid permeation hole is not formed in the flexible region (see Fig. 5). In the aspect 5, in the case of the convex deformation of the absorbent article, the flexible region in which the tension is directly applied to the stretchable region where the tension is not directly applied, the liquid permeation hole is not formed, and the liquid permeation is prevented from being caused by the tension. The pores are stretched and the absorber is exposed.

In the absorbent article of the present invention, it is preferred to form a compression groove in the peripheral portion of the liquid supply region (Section 6). The compression groove is formed by integrating the peripheral portion of the liquid supply region and the absorber into a single body. The recess. In the aspect 6, the absorbent article is deformed in a convex shape by using the compression groove as a starting point, and when the convex shape of the absorbent article is deformed, the stretching and prevention of the stretchable field in the excessive compression of the absorbent body are effectively generated. The elastic restoring force in the flexible field of deflection of the liquid permeable sheet.

In the absorbent article of the present invention, the liquid permeable sheet is preferably a blood modifying agent containing a water solubility of 0.000 to 0.60 IOB, a melting point of 45 ° C or less, and a water solubility of 100 g of water at 25 ° C of 0.00 to 0.05 g. Sample 7). In the case 7, when the absorbent article is absorbed by the menstrual blood, the menstrual blood reaching the liquid permeable sheet is modified by contact with the blood modifying agent, and the menstrual blood having high viscosity is less likely to remain in the liquid permeable sheet or the liquid permeable sheet. The sticky feeling is reduced, the refreshing feeling is improved, and the user is not easy to have a visual unpleasant feeling.

In the aspect 7, the blood modifying agent is, for example, the following (i) to (iii): (i) a hydrocarbon; (ii) a CC having (ii-1) a hydrocarbon moiety and (ii-2) the hydrocarbon moiety; a compound of one or more of the same or different groups selected from the group consisting of a carbonyl group (-CO-) and an oxy group (-O-) inserted between the single bonds; and (iii) having (iii-1) a hydrocarbon a portion or a plurality of identical or different groups selected from the group consisting of a carbonyl group (-CO-) and an oxy group (-O-) inserted between the CC single bond of the hydrocarbon moiety (iii-2) And (iii-3) a compound which substitutes one or a plurality of identical or different groups selected from the group consisting of a carboxyl group (-COOH) and a hydroxyl group (-OH) of a hydrogen atom of the aforementioned hydrocarbon moiety; And a group consisting of any combination of these, wherein, in the compound of (ii) or (iii), when two or more oxy groups are inserted, each oxy group is not adjacent (the aspect 8).

In the aspect 7 or 8, the blood modifying agent is, for example, the following (i') to (iii'): (i') hydrocarbon; (ii') has (ii'-1) hydrocarbon moiety, and (ii' -2) a carbonyl bond (-CO-), an ester bond (-COO-), a carbonate bond (-OCOO-), and an ether bond (-O-) inserted between the CC single bonds of the aforementioned hydrocarbon moiety One or a plurality of identical or different bonded compounds selected in the group; and (iii') a CC single having (iii'-1) hydrocarbon moiety and (iii'-2) the aforementioned hydrocarbon moiety One or plural selected from the group consisting of a carbonyl bond (-CO-), an ester bond (-COO-), a carbonate bond (-OCOO-), and an ether bond (-O-) inserted between the bonds One or a plurality of identical or different linkages, one or more selected from the group consisting of (iii'-3) a carboxyl group (-COOH) and a hydroxyl group (-OH) replacing a hydrogen atom of the aforementioned hydrocarbon moiety And a compound consisting of any combination thereof, wherein, in the compound of (ii') or (iii'), when two or more identical or different bonds are inserted, each The bond is not adjacent (state 9).

In the aspects 7 to 9, the blood modifying agent is, for example, the following (A) to (F): (A) (A1) having a chain hydrocarbon moiety and 2 to 4 of a hydrogen atom replacing the aforementioned chain hydrocarbon moiety; a compound having a hydroxyl group and (A2) an ester having a chain hydrocarbon moiety and a compound which substitutes one carboxyl group of a hydrogen atom of the chain hydrocarbon moiety; (B) (B1) has a chain hydrocarbon moiety and a substituted chain a compound having 2 to 4 hydroxyl groups of a hydrogen atom of a hydrocarbon moiety and (B2) an ether having a chain hydrocarbon moiety and a compound having one hydroxyl group substituted for the hydrogen atom of the chain hydrocarbon moiety; (C) (C1) containing a chain a hydrocarbon moiety, a carboxylic acid, a hydroxy acid, an alkoxy acid or a pendant oxyacid which replaces 2 to 4 carboxyl groups of a hydrogen atom of the aforementioned chain hydrocarbon moiety, and (C2) has a chain hydrocarbon moiety and a substituted chain hydrocarbon An ester of a compound having a hydroxyl group of a part of a hydrogen atom; (D) an ether bond (-O-) having a chain hydrocarbon moiety interposed between a CC single bond of the aforementioned chain hydrocarbon moiety, and a carbonyl bond (-CO-) a compound selected from the group consisting of ester linkage (-COO-) and carbonate linkage (-OCOO-); (E) polyoxygenated C _2-6 alkanediol, or an alkane thereof a base ester or an alkyl ether; and (F) a chain hydrocarbon; And any combination of them is selected in the group (Stage 10).

In the aspect 7 to 10, the blood modifying agent is, for example, an ester of (a ₁ ) chain hydrocarbon tetraol with at least one fatty acid, (a ₂ ) chain hydrocarbon triol and at least one fatty acid ester, (a ₃ ) an ester of a chain hydrocarbon diol with at least one fatty acid, (b ₁ ) a chain hydrocarbon tetraol and at least one aliphatic monohydric alcohol ether, (b ₂ ) a chain hydrocarbon triol and at least one fat a monohydric alcohol ether, (b ₃ ) a chain hydrocarbon diol and at least one aliphatic monohydric alcohol ether, (c ₁ ) a chain hydrocarbon tetracarboxylic acid having four carboxyl groups, a hydroxy acid, an alkoxy group An acid or an acid ester of a oxo acid with at least one aliphatic monohydric alcohol, (c ₂ ) a chain hydrocarbon tricarboxylic acid having three carboxyl groups, a hydroxy acid, an alkoxy acid or a oxo acid and at least one aliphatic a monohydric alcohol ester, (c ₃ ) a chain hydrocarbon dicarboxylic acid having two carboxyl groups, a hydroxy acid, an alkoxy acid or a side acid and an ester of at least one aliphatic monohydric alcohol, (d ₁ ) fat An ether of a monohydric alcohol and an aliphatic monohydric alcohol, (d ₂ )dialkyl ketone, an ester of a (d ₃ ) fatty acid and an aliphatic monohydric alcohol, (d ₄ ) a dialkyl carbonate, (e ₁ ) polyoxy C _{2 ~ 6} alkanediols, (e ₂₎ polyoxy C _{2 ~ 6} alkylene glycol and at least one ester of fatty acid, (e ₃₎ polyoxy C _{2 ~ 6} alkanediol Ether least one of an aliphatic monohydric alcohol, (e ₄₎ polyoxy C _{2 ~ 6} alkylene glycol and a chain hydrocarbon tetracarboxylic acid, chain hydrocarbon tricarboxylic acid, a dicarboxylic acid of chain hydrocarbon or ester, ( e ₅ ) polyoxy C _2-6 alkanediol and chain hydrocarbon tetraol, chain hydrocarbon triol, or ether of chain hydrocarbon diol, and (f ₁ ) chain alkane, and any combination thereof Selected in the group (Stage 11).

In the absorbent article of the present invention, two or more of the aspects 1 to 11 can be combined.

The type and use of the absorbent article of the present invention are not particularly limited, and examples thereof include sanitary napkins, sanitary pads, disposable diapers, incontinence pads, incontinence pads, sweat pads, and the like. These may be artificial objects or animals other than people such as pets. The liquid to be absorbed by the absorbent article is not particularly limited, and is, for example, a liquid excrement of a user, a body fluid, or the like.

Hereinafter, the absorbent article of the present invention will be described by using a sanitary napkin as an example. The embodiment.

<First embodiment>

As shown in Fig. 1 and Fig. 2, the sanitary napkin 1 of the first embodiment includes a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and an absorbent provided between the top sheet 2 and the back sheet 3. Body 4.

In FIG. 1, the X-axis direction is the width direction of the sanitary napkin 1, the Y-axis direction is the longitudinal direction of the sanitary napkin 1, and the direction of the plane of the X-axis Y-axis is the plane direction of the sanitary napkin 1. The same is true in other figures. Fig. 2 is a schematic cross-sectional view in which the snake abdomen 210 formed on the top sheet 2 is omitted.

The sanitary napkin 1 is used by the user for the purpose of absorbing liquid excrement (especially menstrual blood). At this time, the top sheet 2 is used as the user's skin side and the back sheet 3 is the user's clothing (pant) side. The liquid excrement is absorbed through the top sheet 2 to the absorber 4 and absorbed by the absorber 4. Reserved. Absorbed by the absorber 4. Leakage of the retained liquid excrement is prevented by the back sheet 3.

As shown in Fig. 1 and Fig. 2, the top sheet 2 and the back sheet 3 are joined to each other by the sealing portions 7a, 7b to form the body portion 11 while the end portions in the width direction are joined to each other by the sealing portions 8a, 8b. The substantially rectangular wing portions 12a and 12b extending in the width direction from the main body portion 11 are formed. The peripheral portions of the top sheet 2 and the back sheet 3 are joined by the sealing portions 7a, 7b, 8a, 8b to prevent separation of the two sheets when the sanitary napkin 1 is deformed.

The shape of the main body portion 11 can be appropriately changed in accordance with a range of a woman's body, underwear, and the like, and may be, for example, a slightly rectangular shape, a slightly elliptical shape, or a slightly gourd shape. The extension of the main body portion 11 in the longitudinal direction is usually 100 to 500 mm, preferably 150 to 350 mm, and the extension of the main body portion 11 in the width direction is usually 30 to 200 mm, preferably 40 to 180 mm.

Examples of the bonding pattern of the sealing portions 7a, 7b, 8a, and 8b include embossing, ultrasonic waves, and hot-melt adhesives. In order to increase the bonding strength, two or more bonding patterns may be combined (for example, embossing or the like after bonding by a hot-melt type adhesive).

The embossing processing may be, for example, a method in which the top sheet 2 and the back sheet 3 are passed together by embossing between the patterned embossing roll and the flat roll, and the embossing process (so-called method called Round seal). In this method, since the sheets are softened by the heating of the embossing roll and/or the flat roll, the sealing portion is apparently easily formed. The embossed pattern may be, for example, a lattice pattern, a thousand bird pattern, or a wavy pattern. At the boundary of the sealing portion, the sanitary napkin 1 becomes less likely to be bent, and the embossed pattern is preferably intermittent or elongated.

Hot melt adhesives, for example, styrene-ethylene-butadiene-styrene (SEBS), styrene-butadiene-styrene (SBS), styrene-isoprene-styrene (SIS) The rubber is mainly a pressure-sensitive adhesive or a heat-sensitive adhesive mainly composed of an olefin such as a linear low-density polyethylene; a water-soluble polymer (for example, polyvinyl alcohol or carboxymethyl fiber) A water-sensitive adhesive such as a pigment or gelatin or a water-swellable polymer (for example, polyvinyl acetate or sodium polyacrylate). then Examples of the coating method of the agent include spiral coating, applicator coating, curtain coater coating, and SUMMITGUN coating.

As shown in Fig. 2, adhesive portions 9a, 9b are provided on the garment side of the back sheet 3 forming the wing portions 12a, 12b, and an adhesive portion 9c is provided on the garment side of the back sheet 3 forming the main body portion 11. The adhesive portion 9c is adhered to the crotch portion of the undergarment, and the wings 12a, 12b are bent on the outer side of the undergarment, and the adhesive portions 9a, 9b are adhered to the crotch portion of the undergarment, and the sanitary napkin 1 is stably fixed to the undergarment.

The adhesive contained in the adhesive portion 9a, 9b, 9c may, for example, be a styrene-ethylene-butylene-styrene block copolymer, a styrene-butene polymer, or a styrene-butene-styrene block copolymer. Styrene polymer such as styrene-isobutylene-styrene copolymer; C5 petroleum resin, C9 petroleum resin, dicyclopentadiene petroleum resin, rosin petroleum resin, polyterpene resin, terpene An adhesive imparting agent such as a phenol resin; a monomer plasticizer such as tricresyl phosphate, dibutyl phthalate or dioctyl phthalate; a polymer plasticizer such as an ethylene polymer or a polyester.

The top sheet 2 is provided on the surface in contact with the user's skin for the purpose of enhancing the skin contact when the user uses the sanitary napkin 1.

The top sheet 2 is composed of a flexible material. The flexible material is a material that has elastic restoring force (rebounding force) to deformation. Although the flexible material can be stretched by the force applied during deformation, it is preferable that the elastic restoring force against deformation is substantially not stretched by the force applied during the deformation.

The flexible material may, for example, be a synthetic resin or a synthetic resin, and may, for example, be a total of olefins and other monomers such as acrylate or vinyl acetate. Polyester; polyolefin of low density polyethylene, linear low density polyethylene, high density polyethylene, polypropylene, etc.; polyester such as polyethylene terephthalate; polyamine; cellulose acetate, etc. Among these, a copolymer of an olefin and another monomer, a polyolefin, etc. are preferable from the viewpoint of high flexibility and little irritation to the skin. The flexible material is a mixed material of two or more kinds of synthetic resins, for example, a mixed material of 20 to 60% of low-density polyethylene, 30 to 60% of linear low-density polyethylene, and 5 to 20% of high-density polyethylene. .

As shown in Fig. 1 and Fig. 2, the top sheet 2 is provided with a waste supply region 20a that receives supply of liquid excrement from the user, and a peripheral region 20b around the periphery. The excrement supply area 20a includes a first field 201 contacting a user's excretory opening (for example, a labia minora, a labia majora, a vaginal opening, etc.), and a second field 202 located around the first field 201, and the excrement is The length of the supply region 20a is usually 50 to 200 mm, preferably 70 to 150 mm, and the width is usually 10 to 80 mm, preferably 20 to 50 mm. In the first field 201, in order to improve the absorbability of the liquid excrement, it is larger than the field of the excretory opening of the user actually contacting the user. The second field 202 is disposed around the first field 201 in order to prevent leakage of liquid excrement that is not absorbed by the first field 201. The second field 202 is particularly effective in preventing leakage from the width direction of the sanitary napkin 1 in the leakage of the liquid excrement that is not absorbed by the first field 201.

As shown in Fig. 1 and Fig. 3, in the top sheet 2, a portion of the excrement supply region 20a and the peripheral region 20b are formed to form a mesh-like flexible region 22, and stretchability is formed inside each mesh. Field 21. The stretchable field 21 has a stretch due to the extension of the snake abdomen 210 The flexible, flexible field 22 has flexibility (elastic restoring force against deformation) caused by a flexible material constituting the top sheet 2. Further, as shown in FIG. 3, the flexible region 22 is slightly flat and does not have the stretchability of the structure of the stretchable region 21.

As shown in FIG. 3, in the stretchable region 21, a snake belly 210 having a repeating structure of a mountain fold portion and a valley fold portion is formed. The stretched region 21 can be stretched in the width direction and the thickness direction of the sanitary napkin 1 by the mountain fold portion and the valley fold portion of the snake belly 210. In addition, in FIG. 3, when the top sheet 2 side is the upper side and the back sheet 3 side is the lower side, the upper side convex part is a mountain fold part, and the lower side convex part is a valley fold part.

As shown in FIG. 1 and FIG. 3, the mountain fold portion and the valley fold portion of the snake belly 210 are extended in the longitudinal direction of the sanitary napkin 1 and are arranged side by side in the width direction of the sanitary napkin 1. When the sanitary napkin 1 is bent along the longitudinal direction and convexly deformed toward the top sheet 2, the stretching of the snake belly 210 that prevents excessive compression of the absorbent body 4 is effectively generated (to the sanitary napkin 1) The extension in the width direction).

As shown in Fig. 3, the cross section of the snake abdomen 210 along the width direction of the sanitary napkin 1 is slightly wavy. In a slightly wavy shape, a shape in which a U-shaped curve is formed as a straight line, a U-shaped shape is reversed C-shaped, and a U-shaped V-shaped shape is applied is included.

The width of the uppermost portion of the mountain fold portion and the width of the lowermost portion of the valley fold portion are usually 0.1 to 2.0 mm, preferably 0.2 to 1.5 mm, the height of the mountain fold portion, and the depth of the valley fold portion, usually 0.3 to 3.0. Mm, preferably 0.5 to 1.5 mm, the width of the uppermost part of the adjacent mountain folds and the adjacent valley folds The width of the lowermost portion is usually 0.3 to 3.0 mm, preferably 0.5 to 2.0 mm.

The snake abdomen 210 can also have contractility in addition to stretchability. However, even if the snake's abdomen 210 has contractility, the stretched snake's abdomen 210 does not completely contract to its original state and maintains a slightly extended state than the original state due to the material of the snake's abdomen 210 and the number of the snake's belly.

In the case where the snake abdomen 210 is contracted, the elastomer material may be mixed with the flexible material constituting the top sheet 2. Examples of the elastomer include polyester-based, urethane-based, olefin-based, styrene-based, polyamido-based thermoplastic elastomers, low-density polyethylene using a metallocene catalyst, and ethylene-α- Olefin copolymers, combinations of these, and the like.

The polyester-based elastomer may, for example, be an aromatic polyester-containing hard chain segment, an amorphous polyether, or an aliphatic polyester equal to a soft chain link, or an urethane-based elastomer, and may be, for example, heat. A polyurethane of a plastic elastomer, a low molecular weight diol, a methyl bisphenyl isocyanate or the like, and an olefin elastomer, for example, a random copolymer of ethylene and an α-olefin, and ethylene. Examples of the styrene-based elastomer such as a random copolymer of an α-olefin and a diene, and a block copolymer such as SEBS, SIS, SEPS, or SBS, and the polyamine-based elastomer may be contained, for example. Nylon of hard chain links, and polyester or polyol as soft links.

As shown in FIG. 1 and FIG. 3, the flexible field 22 has a linear region of a plurality of straight lines (hereinafter referred to as "fields" extending in a direction intersecting with the longitudinal direction of the sanitary napkin 1 and arranged in parallel. A _1-m ′′), and n fields (hereinafter referred to as “field B _1-n ”) which are slightly linearly arranged in parallel with the field A _1-m and are arranged in parallel, and the field A _1-m and The fields B _1-n become mesh-like due to the intersection.

The angle α _{1 of the} field A _1-m intersecting the longitudinal direction of the sanitary napkin 1 is usually 1 ° ≦ α ₁ ≦ 90 °, preferably 10 ° ≦ α ₁ ≦ 80 °, and more preferably 30 ° ≦ α ₁ ≦ 60°. Field B _1-n with a physiologically intersecting with the longitudinal direction of the sanitary napkin an angle α ₂ (however, the field B _1-n to the angle of intersection A _1-m art to α ₁ + α _2), is usually 1 ° ≦ α ₂ ≦ 90°, preferably 10° ≦ α ₂ ≦ 80°, and more preferably 30° ≦ α ₂ ≦ 60°. However, the choice of α ₁ and α ₂ does not make α ₁ + α ₂ 180°. When α ₁ and α _{2 are} in the above range, the field A _1-m and the field B _{1-n are} sandwiched between the longitudinal direction of the sanitary napkin 1 and are located on both sides, so that the sanitary napkin 1 is bent along the longitudinal direction. In the case of the convex deformation, the elastic restoring force (rebounding force) of the flexible region 22 which is convexly deformed is easily exhibited, and the mesh size necessary for the formation of the snake abdomen 210 of the stretchable region 21 is ensured.

The number of the fields A _1-m (m) and the number of the fields B _1-n (n) are not limited to the numbers shown in Fig. 1, and may be appropriately changed depending on the size of the sanitary napkin 1 or the like. m and n are the same or different values, and the numerical ranges of m and n are usually 4 to 60, preferably 8 to 40, and more preferably 10 to 35.

The width of each of the fields A _1-m and the fields B _1-n is usually 0.1 to 5 mm, preferably 0.3 to 3 mm, and more preferably 0.5 to 2 mm. When the width of the field A _1-m and the field B _1-n is in the above range, the elastic restoring force (rebounding force) of the flexible region 22 which is convexly deformed is easily exhibited, and the formation of the snake abdomen 210 of the stretchable field 21 is ensured. The required mesh size.

As shown in FIGS. 1 and 3, the shape of each mesh formed by the intersection of the fields A _1-m and the fields B _1-n is a slightly diamond shape. The present embodiment can also be modified such that the shape of each mesh has a slightly polygonal shape such as a slightly triangular shape, a slightly square shape, or a slightly pentagonal shape. The slightly polygonal shape includes a shape in which a straight line is formed to be rounded, and a straight line constituting one side is deformed into a curve or the like. Further, the present embodiment may be modified such that the fields A _1-m and the fields B _{1-n have} a curved shape, and the shape of each mesh is a substantially circular shape or a slightly elliptical shape.

The size of each of the meshes in the longitudinal direction and the width direction of the sanitary napkin 1 is usually 3 to 40 mm, preferably 5 to 30 mm, and more preferably 10 to 20 mm. When the size of each of the meshes is in the above range, the elastic restoring force (rebounding force) of the flexible region 22 which is convexly deformed is easily exhibited, and the mesh size necessary for forming the snake abdomen 210 of the stretchable region 21 is secured.

The total number of the mountain folds and the valley folds formed on each of the meshes is usually 3 or more, preferably 5 to 19, and more preferably 7 to 15. However, the total number of mountain folds and valley folds is an odd number. When the total number of the mountain folds and the valley folds of the snake abdomen 210 is in the above range, when the sanitary napkin 1 is convexly deformed, the stretch of the snake belly 210 that prevents excessive compression of the absorbent body 4 is effectively generated.

As shown in FIGS. 1 and 3, the flexible region 22 surrounds the entire periphery of the stretchable region 21, and the connection between the adjacent stretchable regions is interrupted by the flexible region 22. This embodiment can also be modified such that one of the surrounding portions of the stretchable region 21 is surrounded by the flexible region 22. In this case, in the case of the convex deformation of the sanitary napkin 1, the elastic resilience of the flexible region 22 which effectively prevents the stretching of the stretchable region 21 which prevents excessive compression of the absorbent body 4 and prevents the deflection of the top sheet 2 In view of the above, the flexible region 22 is preferably 30% or more of the entire periphery of the stretchable region 21, and more preferably 50% or more.

As shown in FIGS. 1 and 3, the flexible region 22 is continuous with the peripheral portion of the stretchable region 21. Moreover, as shown in FIG. 3, the flexible field 22 is continuous with the uppermost part of the mountain fold of the snake belly 210. The present embodiment can also be modified so that the flexible region 22 and the lowermost portion of the valley portion of the snake belly 210 are continuous. However, from the viewpoint of smoothness of the skin surface side of the flexible sheet 22 and the top sheet 2, as shown in FIG. 3, the flexible field 22 and the uppermost portion of the mountain portion of the snake belly 210 are continuous. good.

As shown in FIG. 3, a plurality of liquid permeation holes 26 are formed in the top sheet 2, and liquid excretions are allowed to permeate the absorber 4 through the liquid permeation holes 26. As shown in FIG. 3, the liquid permeation hole 26 is formed in the stretchable region 21 in which the excrement of the top sheet 2 is convexly deformed in the supply region 20a without direct application of tension (in the snake abdomen 210, the uppermost portion of the mountain fold portion) The side surface portion 25) that is continuous with the lowermost portion of the valley fold portion is not formed in the flexible region 22 where tension is directly applied during the convex deformation. Therefore, the liquid permeation hole 26 is less likely to be stretched by the tension, and the absorber 4 that absorbs the liquid excrement is prevented from coming into contact with the skin of the user, giving the user a sticky feeling and an unpleasant feeling.

The opening area of one liquid permeation hole 26 is preferably 0.001 to 1 mm ² , and more preferably 0.01 to 0.1 mm ² . When the opening area of one liquid permeation hole 26 is less than 0.001 mm ² , liquid excretion becomes difficult to permeate, and when it exceeds 1 mm ² , liquid excrement absorbed by the absorber 4 passes through the top sheet 2 When the liquid passes through the hole 26 and flows backward, or the concealability of the top sheet 2 becomes small.

The ratio of the total opening area of the area of the top sheet 2, that is, the opening ratio of the top sheet 2 is preferably 5 to 20%. When the aperture ratio of the top sheet 2 is less than 5%, the permeability of the body fluid in the top sheet 2 is deteriorated. When the aperture ratio of the top sheet 2 exceeds 20%, the body fluid absorbed by the absorber 4 passes through the top sheet. The liquid of the second liquid passes through the hole 26 and flows back through the liquid permeation hole 26 to the liquid excrement absorbed by the absorber 4.

The thickness, the amount of the flat sheet, and the like of the top sheet 2 are appropriately adjusted from the viewpoints of the formability of the snake abdomen 210 of the stretchable field 21 and the flexibility of the flexible field 22. The amount of the top sheet 2 is usually 10 g/m ² or more, preferably 10 to 40 g/m ² , more preferably 20 to 30 g/m ² , and the thickness of the top sheet 2 is usually 0.01 to 3.0 mm, preferably. It is 0.1~1.5mm.

The top sheet 2 may contain an inorganic filler such as titanium oxide, barium sulfate or calcium carbonate from the viewpoint of improving the concealability of the top sheet 2.

The top sheet 2 can be a laminated film. The laminated film may, for example, be a laminated film of a synthetic resin film layer and a fiber assembly layer provided on the side of the garment side. The fiber assembly layer contains, for example, a paper which is an aggregate of hydrophilic fibers, a nonwoven fabric, or the like. The nonwoven fabric used as the fiber assembly layer is preferably a woven fabric. The basis weight of the fabric refers to Kraft pulp, rayon or the like as the main component imparting wet strength of 10g / m ² or more, 20g / m ² or less of the thin paper. The thickness of the fiber collecting layer is preferably 0.1 to 0.5 mm. The fiber assembly layer imparts hydrophilicity and softness to the top sheet 2. In the case where a fabric is used in the fiber assembly layer, the fabric is inexpensive compared to other papers and non-woven fabrics, and is easily obtained because there are many in and out of the market. Although the strength of the fabric layer is low, the strength of the top sheet 2 is ensured by use together with the synthetic resin film layer.

The back sheet 3 is provided on the surface in contact with the user's clothes (underpants) for the purpose of preventing leakage of the liquid excrement absorbed by the absorber 4. The back sheet 3 preferably has moisture permeability in addition to liquid impermeability in order to reduce the sultry heat during use.

The back sheet 3 is, for example, a non-woven fabric to which water repellent treatment, a synthetic resin (for example, polyethylene, polypropylene, polyethylene terephthalate, etc.) film, a composite sheet of a non-woven fabric and a synthetic resin film (for example, in spunbond and water flow). For example, a non-woven fabric or a composite film of a breathable synthetic resin film may be used, or an SMS nonwoven fabric in which a melt-resistant nonwoven fabric having high water resistance is held by a high-strength spunbonded nonwoven fabric may be used.

As shown in Fig. 1 and Fig. 2, in the top sheet 2, compression grooves 5a and 5b are formed in the first region 201 of the excrement supply region 20a and the peripheral portion of the second region 202, respectively. Since the sanitary napkin 1 is stably deformed convexly with the compression grooves 5a and 5b as the starting point, when the sanitary napkin 1 is convexly deformed, the stretching of the stretchable field 21 which prevents excessive compression of the absorbent body 4 is effectively generated. And an elastic restoring force of the flexible field 22 that prevents deflection of the top sheet 2.

The compression grooves 5a and 5b are supplied to the first field 201 and the second collar of the field 20a by embossing using, for example, a heating roller. The peripheral portion of the region 202 and the absorber 4 are formed by compression and integration.

As shown in FIG. 1 and FIG. 2, the compression grooves 5a and 5b are formed in the entire periphery of the first region 201 and the second region 202 of the liquid supply region 20a. The present embodiment can be modified such that the compression grooves 5a and 5b are formed in a part of the first region 201 of the liquid supply region 20a and the peripheral portion of the second region 202.

The absorber 4 is divided into an absorber 4a located on the back sheet 3 side of the first field 201 of the excrement supply area 20a and a back of the second field 202 located in the excrement supply area 20a by the compression grooves 5a, 5b. The absorber 4b on the side of the sheet 3, and the absorber 4c on the side of the back sheet 3 of the peripheral area 20b. The thickness of the excrement is supplied to the field 20a by the absorber 4a, and since the compression grooves 5a and 5b can induce the convex excrement to be convexly deformed by the supply region 20a, the excrement of the user is supplied to the field 20a. Sexual improvement. The absorber 4b is higher in density than the absorber 4a, and it is easy to maintain rigidity even after the excrement is absorbed, so that the dislocation of the entire sanitary napkin 1 after the excrement is absorbed is prevented.

As shown in Fig. 2, an adhesive layer S1 is formed between the first field 201 of the excrement supply region 20a and the absorber 4a, and between the second field 202 of the excrement supply region 20a and the absorber 4b. In the subsequent layer S1, the first field 201 and the second field 202 of the excrement supply region 20a and the absorbers 4a and 4b are peelably connected to each other, and the sanitary napkin 1 is convexly deformed, and then discharged. The first field 201 and the second field 202 of the object supply region 20a are separated from each other by the absorbers 4a and 4b, and separated. In the present embodiment, the excrement is supplied to the field 20a. The adhesive layer S1 is formed on the joint surface of the first field 201 and the absorber 4a, and the joint surface of the second field 202 and the absorber 4b of the excrement supply region 20a, but the embodiment may be modified. The adhesive layer S1 is formed on a part of the joint surface or the adhesive layer S1 is not formed.

As shown in Fig. 2, an adhesive layer S2 is formed between the peripheral region 20b and the absorber 4c. The subsequent layer S2 is an adhesive layer having a higher strength than the adhesive layer S1. When the adhesive layer S2 is stronger than the adhesive layer S1, when the sanitary napkin 1 is deformed, peeling of the peripheral region 20b and the absorbent body 4c or peeling can be prevented. In the present embodiment, the adhesive layer S2 may be formed over substantially the entire joint surface of the peripheral region 20b and the absorber 4c. However, the present embodiment may be modified to form the adhesive layer S2 on a part of the joint surface.

The adhesive agent contained in the layer S1, S2 is preferably a hot-melt adhesive or a hot-melt adhesive, and may, for example, be styrene-ethylene-butadiene-styrene (SEBS) or styrene-butadiene. - a pressure-sensitive adhesive mainly composed of a rubber such as styrene (SBS) or styrene-isoprene-styrene (SIS) or a olefin based on a linear low-density polyethylene or Sensible water-based adhesive; water-sensitive polymer (such as polyvinyl alcohol, carboxymethyl cellulose, gelatin, etc.) or water-swellable polymer (such as polyvinyl acetate, sodium polyacrylate, etc.) Followers and so on. When the adhesive is oozing out from the sanitary napkin 1, it is preferable to give the user an unpleasant feeling, and it is preferable to use a heat-sensitive adhesive having a low viscosity as compared with the pressure-sensitive adhesive.

The adhesive strength of the subsequent layer S1, S2 can be, for example, an adhesive The type, base weight, etc. are adjusted.

When the strength is adjusted by the type of the adhesive, a low-adhesive adhesive is selected as the adhesive contained in the adhesive layer S1, and an adhesive having a higher viscosity is selected as the adhesive contained in the adhesive layer S2. . The low-adhesive adhesive agent may, for example, be a rubber-based or olefin-based hot-melt adhesive. However, in the manufacturing step of the sanitary napkin 1, it is difficult to produce carbides even when heated in a tank for a long period of time. The rubber system is preferred.

The viscosity of the subsequent agent can be adjusted, for example, by the presence or absence of addition of paraffin as an adhesion modifier or by an increase or decrease in the amount of addition. Add paraffin as an adhesion modifier, or increase the amount of addition, and the adhesiveness of the adhesive is reduced. The low-viscosity hot-melt adhesive thus adjusted may, for example, be SBS (10 to 30%), paraffin oil (5 to 15%) as a viscosity adjuster, paraffin (5 to 30%) as an adhesion adjuster, A hydrogenated dicyclopentadiene hydrocarbon resin (40 to 60%) as an adhesion-imparting agent, and a mixture of other components (minor amounts) such as an antioxidant and an ultraviolet absorber, and a high-viscosity hot-melt adhesive can be exemplified. For example, SBS (20 to 40%), paraffin oil (10 to 20%) as a viscosity adjuster, hydrogenated dicyclopentadiene hydrocarbon resin (40 to 60%) as an adhesion-imparting agent, and antioxidants, ultraviolet rays The other components (minor amounts) such as the absorbent are melted and mixed.

When the strength is adjusted by the basis weight of the adhesive, the basis weight of the adhesive layer S1 is usually 0 to 30 g/m ² , preferably 2 to 20 g/m ² , and more preferably 3 to 10 g/m ^{2 .} The basis weight of the adhesive layer S2 is usually 2 to 30 g/m ² , preferably 3 to 20 g/m ² , and more preferably 5 to 10 g/m ² .

Next, a method of forming the agent layers S1 and S2 (adhesive coating) The cloth method) may, for example, be spiral coating, applicator coating, curtain coater coating, SUMMITGUN coating, or the like. When the adhesive layers S1 and S2 are formed, it is possible to apply an adhesive to either of the top sheet 2 and the absorber 4, but in the case where the top sheet 2 is coated with an adhesive, the top sheet 2 is a film viewpoint to be non-contact. Spiral coating or SUMMITGUN coating is preferred.

The adhesive strength of the subsequent layer S2 is larger than that of the adhesive layer S1. The adhesive strength of the subsequent layer S2 is usually 110% or more, preferably 110 to 1000%, and more preferably 150 to 500% of the adhesive layer S1. When the adhesive strength of the adhesive layer S2 is in the above range, the extensibility field 21 of the excrement supply region 20a is easily stretched in the thickness direction of the sanitary napkin 1 and is easily separated from the absorbent bodies 4a, 4b.

Further, "adhesion strength" means the maximum peeling strength of the sheet 2 and the joined member which are transmitted through the adhesive layer top sheet. For example, in the case where the top sheet 2 has a structure in which the back side is bonded to the non-woven fabric, the peeling strength of the top sheet 2 and the non-woven fabric (non-member rupture value is a peeling value). The value varies depending on the member to be bonded, and the adhesion strength between the peripheral region 20b of the adhesive layer S2 and the absorber 4c is usually 0.4 N/25 mm or more, preferably 0.5 to 5 N/25 mm, and the adhesive layer S1. The first field 201 of the excrement supply region 20a and the strength of the absorber 4a and the adhesion strength between the second field 202 and the absorber 4b of the excrement supply region 20a are usually 0.3 N/25 mm or less, preferably 0. ~0.3N/25mm. Further, when the strength is 0, the case where the adhesive layer is not formed is used.

Specific examples of the general criteria include the following examples.

[Example 1] (Numerical example of the peripheral region 20b) A hot-melt adhesive is applied in a spiral coating between a hot air non-woven fabric 30 g/m ² as a top sheet and a hot air non-woven fabric 30 g/m ² as a second sheet. The maximum peel strength at 5 g/m ² was 0.56 N/25 mm.

[Example 2] (Numerical Example excreta is supplied to the field 20a) as a top sheet in a hot air non-woven fabric 30g / m ² and a second sheet of hot air non-woven fabric 30g / m ² rooms, a low viscosity hot melt adhesive in a spiral The maximum peeling strength at the time of coating application of 5 g/m ² was 0.11 N/25 mm.

[Example 3] (Numerical example of the peripheral region 20b) A low-viscosity hot-melt adhesive was applied by spiral coating between a hot air non-woven fabric 30 g/m ² as a top sheet and a hot air non-woven fabric 30 g/m ² as a second sheet. Cloth 5g/m ² , on the inside of the second sheet, 300 g/m ² of pulp coated with 14 g/m ^{2 of} fabric was used as an absorbent body, and a common hot-melt adhesive was spirally coated between the second sheet and the absorbent body. The cloth was coated in a state of 5 g/m ² , and a compression groove was formed in the top sheet and the absorbent body, and the maximum peeling strength of the top sheet and the second sheet at the formation of the compression groove was 2.30 N/25 mm.

Further, the above numerical values were measured using a universal material testing machine type 5564, in which the top sheet and the second sheet were sandwiched between the upper and lower chucks, and the values measured by the distance between the chucks of 10 mm, the peeling distance of 60 mm, and the chuck speed of 100 mm/min.

The absorbent body 4 has a layer of absorbent material. The absorbent material contained in the absorbent material layer is not particularly limited as long as it absorbs liquid excretion from the user. Examples of the absorbent material include water-absorbent fibers and superabsorbent materials (for example, superabsorbent resins, superabsorbent fibers, and the like). Absorbent material layer, which may contain anti-block agent, UV absorption Agent, viscosity-enhancing branching agent, matting agent, coloring agent, and other various modifiers.

Examples of the water-absorbent fiber include wood pulp obtained by using conifer or broad-leaved trees as raw materials (for example, mechanical pulp such as crushed wood pulp, refined raw pulp, hot-milled mechanical pulp, chemical hot-milled mechanical pulp, kraft pulp, sulfide pulp, and alkali). Chemical pulp such as pulp; semi-chemical pulp, etc.; mercerized pulp or cross-linked pulp obtained by chemical treatment of wood pulp; non-timber such as bagasse, kenaf, bamboo, hemp, cotton (such as cotton linters) Pulp; rayon, regenerated cellulose such as fibrillated rayon; semi-synthetic cellulose such as acetate or triacetate, but preferably pulverized pulp from the viewpoint of low cost and easy forming.

The superabsorbent material may, for example, be a starch-based, cellulose-based or synthetic polymer-based superabsorbent material. Examples of the starch-based or cellulose-based superabsorbent material include a starch-acrylic acid (salt) graft copolymer, a starch-acrylonitrile copolymer saponified product, and a sodium carboxymethyl cellulose crosslinked product. Examples of the superabsorbent material of the system include polyacrylate type, polysulfonate type, anhydrous maleate type, polypropylene amide type, polyvinyl alcohol type, polyethylene oxide type, poly day. a superabsorbent polymer (SAP) such as a glycoside, a polyglutamate, a polyalginate, a starch or a cellulose, but these are polyacrylates (especially A superabsorbent resin of sodium polyacrylate type is preferred. The shape of the superabsorbent material may be, for example, a particulate form, a fibrous form, or a scaly shape. When it is in the form of particles, the particle diameter is preferably 50 to 1000 μm, and more preferably 100 to 600 μm.

The amount of superabsorbent material contained in the layer of absorbent material, It is preferable to change the characteristics (for example, absorbability, lightness, etc.) which the sanitary napkin 1 should have, and it is usually 0 to 50% by mass, preferably 3 to 30% by mass, and more preferably the absorbent material layer. 5~15% by mass.

The thickness, the basis weight, the density, and the like of the absorbent material layer can be appropriately changed depending on the characteristics (for example, absorbability, lightness, and the like) which the sanitary napkin 1 should have. The thickness of the layer of the absorbent material is usually 1 to 20 mm, preferably 2 to 15 mm, more preferably 2 to 10 mm, and the basis weight is usually 100 to 1000 g/m ² , preferably 150 to 700 g/m ² , and more Preferably, it is 200 to 500 g/m ² , and the density is usually 0.005 to 0.5 g/cm ³ , preferably 0.01 to 0.2 g/cm ³ , and more preferably 0.01 to 0.1 g/cm ³ . Further, before and after the formation of the compression grooves 5a, 5b, there are cases where the thickness, the basis weight, the density, and the like of the absorbent material layer are changed (for example, the thickness of the absorbent material layer is reduced, and the basis weight and density are increased).

Although the absorber 4 can be covered with the covering material, it is preferable that the portion (absorbent bodies 4a, 4b) located on the back sheet 3 side of the excrement supply region 20a is not covered. The coating material is not particularly limited as long as it has liquid permeability and absorbent body retainability, and it is preferable to use a pulverized pulp as a main material and a wet-formed fabric from the viewpoint of low cost and absorbent body retention.

The sanitary napkin 1 is held in the inner strand of the user, and when the excrement of the top sheet 2 is bent by the supply region 20a and convexly deformed toward the excrement supply region 20a, the following effects are exhibited.

As shown in Fig. 4, when the sanitary napkin 1 is convexly deformed, the excrement that has passed through the adhesive layer S1 is supplied to the field 20a and the absorber 4a. The 4b peeling and excrement are stretched by the stretchable field 21 of the supply field 20a. Therefore, the absorbent bodies 4a, 4b become less likely to be squeezed by the excrement supply area 20a, and the excessive compression of the absorbent bodies 4a, 4b caused by the convex deformation of the sanitary napkin 1 and the subsequent backflow thereof are prevented.

In particular, in the periphery of the excrement supply region 20a, the exudate is supplied to the peripheral region 20b of the field 20a due to the adhesive layer S2 which is stronger than the adhesive layer S1 and the peripheral region 20b which is adjacent to the absorber 4c. It extends in the thickness direction of the sanitary napkin 1 and is easily separated from the absorbent bodies 4a, 4b. Therefore, the excessive compression of the absorbent bodies 4a, 4b caused by the convex deformation of the sanitary napkin 1 and the back oozing thereof are effectively prevented.

Further, when the user of the sanitary napkin 1 changes his or her posture, and the bending angle of the sanitary napkin 1 becomes a corner or an obtuse angle, the elastic restoring force (rebound force) in the flexible region 22, the top sheet 2 It is easy to match the deformation of the sanitary napkin 1 so that the sheet of the top sheet 2 is prevented from flexing and flexing and sticking to the skin.

When the deformation is applied to the present embodiment, the adhesive layer S1 is not formed between the first region 201 and the absorbent body 4a of the excrement supply region 20a and between the second region 202 and the absorbent body 4b of the excrement supply region 20a. It also exerts the same effect.

<Second embodiment>

In the second embodiment, a blood modifying agent is applied to the surface of the top sheet 2.

The menstrual blood discharged from the top sheet 2, its viscosity and surface tension due to blood Since the modifier is lowered, the top sheet 2 is quickly moved to the absorber 4 and absorbed by the absorber 4. By the increase in the menstrual blood absorption rate of the absorbent body 4, the top sheet 2 becomes less likely to retain menstrual blood having a high viscosity, so that the sticky feeling of the top sheet 2 is lowered, the surface dryness of the top sheet 2 is improved, and the user becomes difficult I feel uncomfortable visually. Further, the menstrual blood discharged from the top sheet 2 is prevented from oozing out from the width direction side of the sanitary napkin 1c.

The field of coating the blood modifying agent may be the whole or a part of the surface of the top sheet 2, but it is preferably in the field of at least the excretory opening (vaginal opening) contacting the user. The blood modifying agent preferably adheres the blood modifying agent to the top sheet 2 in the form of droplets or particles so as not to block the liquid permeation hole of the top sheet 2.

The basis weight of the blood modifying agent applied to the top sheet 2 is preferably from 1 to 30 g/m ² and more preferably from 3 to 10 g/m ² . When the coating weight of the blood modifying agent is less than 1 g/m ² , it is difficult to stably apply the blood modifying agent to the top sheet 2, and the coating weight of the blood modifying agent is larger than 30 g/m ² . Then there is a case where the top sheet 2 is slippery.

The method of applying the blood modifying agent may be, for example, a contact applicator such as a slit coater, a spray applicator, a curtain coater, a spiral coater, or the like after heating to a desired temperature. A method of coating by a non-contact applicator. The method of coating using a non-contact coater is preferred from the viewpoint that the top sheet 2, the droplet-shaped blood modifying agent can be uniformly dispersed, and the top sheet 2 is not damaged.

The time at which the blood modifying agent is applied to the top sheet 2 is not particularly limited, but from the viewpoint of reducing equipment investment, etc., in the sanitary napkin 1 The manufacturing step is preferably to apply a blood modifying agent to the top sheet 2. When the blood modifying agent is applied to the top sheet 2 in the manufacturing step of the sanitary napkin 1, the blood modifying agent is applied to the top in the step of approaching the final step from the viewpoint of suppressing the reduction of the blood modifying agent. Sheet 2 is preferred. For example, a blood modifying agent may be applied to the top sheet 2 immediately before the packaging step of the sanitary napkin 1 is performed.

In the top sheet 2, the field in which the blood modifying agent is applied may be coated with a hydrophilic agent, a water repellent or the like, or may be rendered hydrophilic by corona treatment, plasma treatment or the like. Therefore, when the blood modifying agent is lipophilic, in the field of blood modifying agent application, the hydrophilic portion and the lipophilic portion become sporadically coexist, and the hydrophilic component (mainly plasma) and lipophilic component of the menstrual blood (main Both of the blood cells are quickly moved from the top sheet 2 to the absorber 4.

Further, the blood modifying agent will be described in detail.

<Method of Manufacturing Absorbent Article>

Hereinafter, an embodiment of a method for producing an absorbent article will be described by taking a method for producing a sanitary napkin as an example.

The manufacturing method of the present embodiment includes a step of forming the absorber 4 (step 1A), a step of laminating the top sheet 2 in the absorber 4 (step 2A), a step of forming a compression groove in the laminate (step 3A), and lamination. a step of the back sheet 3 (step 4A), a step of cutting out the sanitary napkin 1 (step 5A), a step of applying the blood modifying agent to the sanitary napkin 1 (step 6A), and using the method shown in FIG. The device 100 is manufactured.

[Step 1A]

On the circumferential surface of the suction drum 120 that rotates in the machine direction MD, as a model of the aggregated absorber material 122, the concave portion 124 is formed at a specific pitch in the circumferential direction. When the suction drum 120 rotates and the concave portion 124 enters the material supply portion 121, the suction portion 126 acts on the concave portion 124, and the absorbent material 122 supplied from the material supply portion 121 is vacuum-attracted to the concave portion 124. The material supply unit 121 is formed to cover the suction drum 120. The material supply unit 121 supplies the absorber material 122 to the concave portion 124 by air transportation, and forms the absorber 4 in the concave portion 124. The absorber 4 formed by the recess 124 is transferred onto the carrier sheet 110 which advances in the machine direction MD.

[Step 2A]

The top sheet 2 is laminated to the absorber 4 to form a laminate 262. At this time, in the top sheet 2, on the surface of the corresponding excrement supply region 20a, an adhesive layer S1 which allows the excrement-charged supply region 20a and the absorber 4 to be peeled off is formed on the surface of the corresponding peripheral region 20b. The adhesive layer S2 is stronger than the adhesive layer S1. The adhesive layer S1 may not be formed on the surface of the corresponding excrement supply region 20a.

[Step 3A]

The laminate 262 forms a compression groove on the laminate 262 by passing between the upper roller 131 and the lower roller 132 of the embossing device 130. A convex portion (not shown) corresponding to the shape of the compression groove is provided on the outer circumferential surface of the upper roller 131. The lower stage roller 132 is a flat roll having a smooth outer peripheral surface. Laminate 262 When passing between the upper roller 131 and the lower roller 132 of the embossing processing device 130, the laminate 262 is compressed in the thickness direction, and the compression grooves 5a, 5b are formed in the laminate 262. The compression grooves 5a, 5b are formed in the top sheet 2 of the first field 201 and the second field 202 of the excrement supply region 20a, and the excrement is supplied to the field 20a by the formation of the compression grooves 5a, 5b. The peripheral portions of the first field 201 and the second field 202 are integrated with the absorber 4.

[Step 4A]

The back sheet 3 supplied from the back sheet roll 140 is laminated on the lower side of the laminate 134 on which the compression groove is formed (opposite side of the top sheet) through the adhesive layer to form a continuous body 144 of the sanitary napkin 1 .

[Step 5A]

The sterilized body 144 of the sanitary napkin 1 is cut by the cutter 150, and the sanitary napkin 1 is cut out.

[Step 6A]

The sprayer 160 is applied with a blood modifying agent, and the blood modifying agent 161 is applied to the central region of the sanitary napkin 1 to form a blood modifying agent layer on the surface of the top sheet 2.

The blood modifying agent layer is preferably formed in the excrement supply region 20a of the top sheet 2, at least in the first field 201.

In the present embodiment, after cutting out the sanitary napkin 1 The blood modifying agent is applied, but it may be applied at any stage before the cutting, or may be applied in the manufacturing step of the top sheet 2 described later. In order to prevent the flow of the blood modifying agent applied during the manufacturing process, it is preferred to apply the blood modifying agent at a stage downstream of the manufacturing step, for example, before the packaging sanitary napkin 1 is approached.

The manufacturing method of the sanitary napkin 1 includes the steps of forming the sealing portions 7a, 7b, 8a, and 8b, the steps of forming the adhesive portions 9a, 9b, and 9c, in addition to the steps 1A to 6A.

<Method for Producing Liquid Permeable Sheet>

Hereinafter, an embodiment of the method for producing the liquid permeable sheet of the present invention will be described by taking a method of producing the top sheet 2 of the sanitary napkin 1 as an example.

The manufacturing method of the present embodiment includes a step (1B) of forming a concave portion in the synthetic resin film sheet and a step (2B) of extending the synthetic resin film sheet.

[Step 1B]

As shown in Fig. 5, the synthetic resin film sheet 212 supplied from the roll 210 is formed into a concave portion 2141 by the concave portion forming roller 220, and is formed in the synthetic resin film sheet 212 (see Fig. 7 for reference). The recess forming roller 220 is composed of an embossing roller 221 and a preheating roller 222 having a smooth surface.

6(a) and 6(b) are views showing an example of the embossing roll 221. Fig. 6(a) is a view showing the entire embossing roll 221, and Fig. 6(b) is a view showing a portion 223 having irregularities on the outer peripheral surface of the emboss roll 221. Figure 6( c) is a view of an example of the preheating roll 222 having a smooth surface. On the surface 223 of the embossing roll 221, a lattice-like convex portion 224 is provided. Thereby, a rhombic recess 225 is formed on the surface of the embossing roll 221 . Further, the shape of the concave portion 225 of the embossing roll 221 is not limited to a rhombic shape, and may be a square, a rectangle, a parallelogram, a trapezoid, a triangle, a hexagon, or the like.

In the lattice-like convex portion 224, the center line spacing of the convex portions 224 arranged in parallel, that is, the pitch of the lattice-shaped convex portions 224 is preferably 0.2 to 10 mm, and more preferably 0.4 to 2 mm. The width of the lattice-like convex portion 224 is preferably 0.01 to 1 mm, and more preferably 0.03 to 0.1 mm. The length of one side of the rhombic recess 225 is preferably 0.1 to 5 mm, and more preferably 0.2 to 1 mm. The range of these is preferably from the viewpoint of improving the formability of the concave portion of the synthetic resin film sheet.

The preheating roll 222 having a smooth surface maintains the temperature of 70 ° C to 100 ° C and heats the supplied synthetic resin film sheet 212 . Thereby, the synthetic resin film sheet 212 becomes soft and can be easily formed.

When the synthetic resin film sheet 212 passes between the rolls 221 and 222, the portion of the synthetic resin film sheet 212 that is in contact with the lattice-like convex portion 224 is subjected to a strong pressure in the thickness direction. Thereby, as shown in FIG. 7, a thin concave portion 2141 is formed in the synthetic resin film sheet 214. Further, in actuality, the number of recesses 2141 formed in the synthetic resin film sheet 214 is smaller than that shown in Fig. 7, and the number of recesses 2141 per unit area is larger than that shown in Fig. 7. The concave portion 2141 is formed in the synthetic resin film sheet 214 on the field 2143 corresponding to the central region of the sanitary napkin 1. Further, in the synthetic resin film sheet 214, the field corresponding to the sanitary napkin 1 is indicated by a broken line of the symbol 2142. field of.

[Step 2B]

By extending the synthetic resin film sheet 214 having the concave portion through the extending tooth roll 230, the field of the stretchable field 21 of the corresponding top sheet 2 in the synthetic resin film sheet 214 is bent, and a synthetic resin film sheet formed with the snake belly 210 is produced. 216. In the synthetic resin film sheet 216, the bellied abdomen 210 is extended in the machine direction (MD) and arranged in the width direction, and the shape of the cross section in the width direction is a wave shape in which a substantially U-shaped curve is combined. In the synthetic resin film sheet 216, the snake belly 210 extending in the machine direction is interrupted at a plurality of places. That is, in the synthetic resin film sheet 216, the snake belly portion 210 is formed discontinuously, and in the discontinuous portion, the synthetic resin film sheet 214 is not bent. This discontinuous portion corresponds to the flexible field 22 of the top sheet 2.

The extending tooth roll 230 includes an upper roll 231 and a lower roll 232. Fig. 8(a) is a view for explaining the upper roller 231 of the extension tooth roller 230, and Fig. 8(b) is a view for explaining the gear teeth 233 disposed on the outer circumferential surface of the upper roller 231, and Fig. 8(c) is a view Fig. 8(b) is a cross-sectional view taken along line BB. The gear teeth 233 extend discontinuously in the circumferential direction of the upper roller 231. That is, the gear teeth 233 extending in the circumferential direction of the upper roller 231 are interrupted at a plurality of places. Since the gear teeth 233 are cut in the middle 234, a discontinuous portion corresponding to the flexible field 22 of the top sheet 2 is formed. The gear teeth 233 are arranged in such a manner that the cut portions 234 are arranged on a straight line in a direction inclined with respect to the direction in which the gear teeth 233 extend.

The width of the gear teeth 233 is, for example, 0.3 to 0.5 mm, and the distance between the centers of the adjacent gear teeth 233 is, for example, 1.0 to 1.2 mm.

Fig. 9(a) is a view for explaining the lower roller 232 of the extension roller 230, and Fig. 9(b) is a view for explaining the gear teeth 235 disposed on the outer circumferential surface of the lower roller 232, and Fig. 9(c) is a view Fig. 9(b) is a cross-sectional view taken along line CC. The gear teeth 235 extend in the circumferential direction of the lower roller 232. The lower roller 232 does not have the above-described roller 231, and the plurality of places are interrupted. The width of the gear teeth 235 is equal to, for example, the width of the gear teeth 233 of the upper roller 231, and the distance between the centers of the adjacent gear teeth 235 is, for example, equal to the distance between the centers of the gear teeth 233 of the upper roller 231.

The length of the upper portion of the upper roller 231, which is the portion of the upper teeth 233 of the upper roller 231 and the gear teeth 235 of the lower roller 232, is, for example, 1.25 mm. The gap between the gear teeth 233 of the upper roller 231 and the gear teeth 235 of the lower roller 232 when the gear teeth 233 of the upper roller 231 are engaged with the gear teeth 235 of the lower roller 232 is, for example, 0.25 to 0.45 mm.

When the synthetic resin film sheet 214 is extended by the tooth roll 230, the liquid permeation hole 26 (refer to FIG. 3 as a reference) corresponding to the top sheet 2 is formed in the field 2143 (refer to FIG. 7 as a reference) in which the concave portion 2141 is formed in the synthetic resin film sheet 214. Opening.

With reference to Fig. 10, the principle of forming an opening in the synthetic resin film sheet 214 when the synthetic resin film sheet 214 is passed through the extending tooth roll 230 will be described. Moreover, the principle does not limit the invention.

Synthetic resin film sheet 214 gear of the upper roller 231 The portion 236 where the teeth 233 are engaged with the gear teeth 235 of the lower roller 232 is substantially extended. In the concave portion forming step, the portion in which the concave portion 2141 (see FIG. 7 is referred to) is formed, and the synthetic resin film sheet 214 is thinned and further damaged by the lattice-like convex portion 224 of the embossing roll 221, so that the strength is weak. The concave portion 2141 of the synthetic resin film sheet 214 is broken by being extended. Therefore, in the extending portion 236 of the synthetic resin film sheet 214, the concave portion 2141 of the synthetic resin film sheet 214 is broken, and the broken portion of the synthetic resin film sheet 214 is enlarged to form an opening.

The synthetic resin film sheet 214 is not extended in the portions 237, 238 where the gear teeth 233 of the upper roller 231 and the gear teeth 235 of the lower roller 232 are not engaged. Therefore, in the synthetic resin film sheet 214, the gear teeth 233 of the upper roller 231 and the portions 237, 238 where the gear teeth 235 of the lower roller 232 are not engaged, even if the synthetic resin film sheet 214 passes through the extending tooth roller 230, in the above-described concave portion forming step, The formed concave portion 2141 does not break and cannot be an opening portion.

In the field where the concave portion 2141 of the synthetic resin film sheet 214 is not formed, the synthetic resin film sheet 214 is stretched even if the synthetic resin film sheet 214 is largely extended by the portion 236 of the gear teeth 233 of the upper roller 231 and the gear teeth 235 of the lower roller 232. It does not break, so no opening is formed.

<blood modifier>

The blood modifying agent of the present invention has an IOB of about 0.00 to about 0.60, a melting point of about 45 ° C or less, and a water content of about 100 ° C for about 25 ° C. A blood modifying agent with a solubility of 0.05 g of water.

IOB (Inorganic Organic Balance) is an index indicating the balance between hydrophilicity and lipophilicity, and in the present specification, the value calculated by the formula: IOB = inorganic value / organic value. In addition, the inorganic value and the organic value are organic concept maps based on Fujita Mu's "Estimation of Organic Compounds and Organic Concepts", Vol. 11, No. 10 (1957) p. 719-725.

The organic value and inorganic value of the main base of Fujita are as shown in Table 1 below.

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

In the blood modifying agent of the present invention, the IOB is preferably from about 0.00 to about 0.60, preferably from about 0.00 to about 0.50, more preferably from about 0.00 to about 0.40, still more preferably from about 0 to about 0.30. Because of the lower IOB, the organicity is high and the affinity with blood cells is increased.

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

The blood modifying agent of the present invention, if it has a melting point of about 45 ° C or less, may be liquid or solid at room temperature, that is, the melting point may be above about 25 ° C, or less than about 25 ° C, and for example may have - The melting point of 5 ° C, about -20 ° C, etc. The melting point of the blood modifying agent of the present invention is about 45 ° C or less, as will be described later.

The blood modifying agent of the present invention preferably has a lower melting point, but preferably has a lower vapor pressure. The blood pressure modifier of the present invention has a vapor pressure of preferably from about 0 to about 200 Pa at 25 ° C (1 atm), more preferably from about 0 to about 100 Pa, more preferably from about 0 to about 10 Pa, still more preferably from about 0 to about 1 Pa. More preferably, about 0.0 to about 0.1 Pa is particularly preferred. The absorbent article is used in contact with the human body. The vapor pressure is preferably from about 0 to about 700 Pa at 40 ° C (1 atm), more preferably from about 0 to about 100 Pa, more preferably from about 0 to about 10 Pa, and even more preferably from about 0 to about 1 Pa. More preferably, it is particularly good from about 0.0 to about 0.1 Pa. When the vapor pressure is high, there is a problem that gasification during storage, a decrease in the amount of the blood modifying agent, and an odor during use are caused.

The melting point of the blood modifying agent of the present invention may vary depending on the weather, the length of time of use, and the like. For example, in an area where the average temperature is about 10 ° C or less, it is considered that by using a blood modifying agent having a melting point of about 10 ° C or lower, the blood modifying agent can stabilize the blood after excretion by blood, even when it is cooled by the ambient temperature. Upgraded.

When the absorbent article is used for a long period of time, the melting point of the blood modifying agent of the present invention is preferably in the range of 45 ° C or lower. The blood modifying agent does not easily move even when it is used for a long period of time due to the influence of sweating and friction during use.

The solubility of 0.00~0.05g of water is 25°C, and after adding 0.05g of the sample in 100g of deionized water, it is allowed to stand for 24 hours. After 24 hours, it can be measured by visually evaluating whether the sample is dissolved or not by gently stirring.

Further, in the present specification, the "solubility" of the water solubility includes a case where the sample is completely dissolved in deionized water to form a homogeneous mixture, and the sample is completely emulsified. Also, "completely" means a mass that has no sample in deionized water.

In this technical field, the surface of the top sheet is coated with a surfactant for the purpose of changing the surface tension of the blood or the like and rapidly absorbing the blood. However, since the surfactant generally has high water solubility, the top sheet coated with the surfactant tends to have good compatibility with hydrophilic components (plasma, etc.) in the blood, and tends to cause the blood to remain in the top sheet. It is considered that the blood modifying agent of the present invention has a low water solubility, and unlike conventional surfactants, blood does not remain in the top sheet and can be quickly moved to the absorber.

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

In the present specification, the "weight average molecular weight" includes a compound derived from a polydisperse system (for example, a compound produced by sequential polymerization, an ester of a plurality of fatty acids and a plurality of aliphatic monohydric alcohols) and a single compound (for example, one type) concept fatty acids with one kind of aliphatic monohydric alcohol esters generated), the mean molecular weight molecules N _i of M _i (i = 1, or i = 1,2 ...) composed of lines, The following formula: M _w = Σ N _i M _i ² / Σ N _i M _i obtained M _w .

In the present specification, the weight average molecular weight means a value in terms of polystyrene obtained by colloidal permeation chromatography (GPC).

The measurement conditions of GPC can be exemplified as follows.

Model: High-speed liquid chromatogram by Hitachi High-Technologies Lachrom Elite

Pipe column: SHODEX KF-801, KF-803 and KF-804 made by Showa Denko Electric Co., Ltd.

Dissolution: THF

Flow rate: 1.0mL/min

Injection volume: 100μL

Detection: RI (differential refractometer)

Moreover, the weight average molecular weight described in the examples of the present specification is measured under the above conditions.

The blood modifying agent of the present invention preferably has the following (i) to (iii), (i) hydrocarbons, (ii) a hydrocarbon having (ii-1) a hydrocarbon moiety, and (ii-2) the above hydrocarbon moiety. a compound of one or a plurality of identical or different groups selected from a group consisting of a carbonyl group (-CO-) and an oxy group (-O-) inserted between a single bond, and (iii) having (iii-1) a hydrocarbon moiety, one or a plurality of the same or different selected from the group consisting of a carbonyl group (-CO-) and an oxy group (-O-) inserted between the CC single bond of the above hydrocarbon moiety (iii-2) a group consisting of a carboxyl group (-COOH) and a hydroxyl group (ia-3) in place of a hydrogen atom of the above hydrocarbon moiety -OH) One or a plurality of compounds of the same or different base selected in the group, and any combination of them selected in the group.

In the present specification, the "hydrocarbon" is a compound composed of carbon and hydrogen, and the chain hydrocarbon may, for example, be a liquid paraffinic hydrocarbon (also referred to as an alkane having no double or triple bond) or an olefinic hydrocarbon (also including one). a double bond olefin), an acetylene hydrocarbon (also known as an alkyne having one triple bond), and a bonded hydrocarbon selected from the group consisting of two or more double bonds and triple bonds, and a cyclic hydrocarbon. For example, aromatic hydrocarbons, alicyclic hydrocarbons.

The hydrocarbon is preferably a chain hydrocarbon or an alicyclic hydrocarbon, more preferably a chain hydrocarbon, a liquid paraffin hydrocarbon, an olefin hydrocarbon, and a hydrocarbon having two or more double bonds (excluding a triple bond). Liquid paraffinic hydrocarbons are the best.

The chain hydrocarbons include linear hydrocarbons and branched chain hydrocarbons.

In the compounds of the above (ii) and (iii), when two or more oxy groups (-O-) are inserted, each of the oxy groups (-O-) is not adjacent. Therefore, among the compounds of the above (ii) and (iii), a compound having a continuous oxy group (so-called peroxide) is not contained.

Further, in the compound of the above (iii), the compound substituted with at least one hydrogen atom of the hydrocarbon moiety by the carboxyl group (-COOH) is substituted with at least one hydrogen atom of the hydrocarbon moiety by a hydroxyl group (-OH). Compounds are preferred. As shown in Table 1, since the carboxyl group is bonded to the metal in the menstrual blood, and the inorganic value is greatly increased from 150 to 400 or more, the blood modifying agent having a carboxyl group has a value of IOB of more than about 0.60 when used. The possibility of a decrease in blood cell affinity.

More preferably, the blood modifying agent of the present invention has (i') to (iii'), (i') hydrocarbon, (ii') (ii'-1) hydrocarbon moiety, and (ii'-2) The intervening between the CC single bonds of the above hydrocarbon moiety is formed by a carbonyl bond (-CO-), an ester bond (-COO-), a carbonate bond (-OCOO-), and an ether bond (-O-). One or a plurality of identical or different bonded compounds selected in the group, and (iii') having a (iii'-1) hydrocarbon moiety and (iii'-2) a CC single bond intercalation between the hydrocarbon moiety One or a plurality of the same selected from the group consisting of a carbonyl bond (-CO-), an ester bond (-COO-), a carbonate bond (-OCOO-), and an ether bond (-O-) Or a different bond, one or a plurality of the same or different selected from the group consisting of a carboxyl group (-COOH) and a hydroxyl group (-OH) substituted with (iii'-3) a hydrogen atom of the above hydrocarbon moiety The compounds of the group, and any combination thereof, are selected in the group.

In the above compounds (ii') and (iii'), when two or more identical or different linkages are inserted, that is, two or more carbonyl linkages (-CO-) and esters are inserted. Where the bond (-COO-), carbonate bond (-OCOO-), and ether bond (-O-) are the same or different bonds, the bonds are not adjacent, and there is at least a bond between the bonds. 1 carbon atom.

The blood modifying agent of the present invention may further preferably have a carbonyl bond (-CO-) of about 1.8 or less, an ester bond (-COO-) of 2 or less, and carbonic acid per 10 carbon atoms in the hydrocarbon moiety. Ester bond (-OCOO-) approx. 1.5 or less, a compound having an ether bond (-O-) of about 6 or less, a carboxyl group (-COOH) of about 0.8 or less, and/or a hydroxyl group (-OH) of about 1.2 or less.

More preferably, the blood modifying agent of the present invention has a chain hydrocarbon moiety and 2 to 4 hydroxyl groups which replace the hydrogen atom of the chain hydrocarbon moiety described below by (A) to (F) and (A) (A1). And (A) a compound having a chain hydrocarbon moiety and a compound which substitutes one carboxyl group of a hydrogen atom of the above-mentioned chain hydrocarbon moiety, (B) (B1) having a chain hydrocarbon moiety and a hydrogen replacing the above chain hydrocarbon moiety; a compound having 2 to 4 hydroxyl groups of an atom and (B2) an ether having a chain hydrocarbon moiety and a hydroxyl group substituted for a hydrogen atom of the chain hydrocarbon moiety; (C) (C1) containing a chain hydrocarbon moiety and a substitution a carboxylic acid, a hydroxy acid, an alkoxy acid or a pendant oxyacid having 2 to 4 carboxyl groups of a hydrogen atom of the above-mentioned chain hydrocarbon moiety and (C2) having a chain hydrocarbon moiety and a hydrogen atom replacing the above chain hydrocarbon moiety An ester of a hydroxyl group compound, (D) having a chain hydrocarbon moiety, an ether bond (-O-), a carbonyl bond (-CO-), an ester bond interposed between a CC single bond of the above chain hydrocarbon moiety ( -COO-), and a compound selected from a group of carbonate linkages (-OCOO-), (E) polyoxy C _2-6 alkanediol, or an alkyl ester or alkyl ether thereof And (F) chain hydrocarbons, and their Any combination is selected in the group.

Hereinafter, the blood modifying agents of (A) to (F) will be described in detail.

[(A) (A1) A compound having a chain hydrocarbon moiety and 2 to 4 hydroxyl groups which replace the hydrogen atom of the above-mentioned chain hydrocarbon moiety, and (A2) having a chain hydrocarbon moiety and a hydrogen atom replacing the above chain hydrocarbon moiety; Ester of a carboxy compound]

(A) (A1) a compound having a chain hydrocarbon moiety and 2 to 4 hydroxyl groups which replace the hydrogen atom of the above-mentioned chain hydrocarbon moiety, and (A2) 1 having a chain hydrocarbon moiety and a hydrogen atom replacing the above chain hydrocarbon moiety The ester of a compound having a carboxyl group (hereinafter also referred to as "the compound (A)") may have a hydroxyl group which may not be esterified under the above-mentioned IOB, melting point and water solubility.

(A1) A compound having a chain hydrocarbon moiety and 2 to 4 hydroxyl groups which replace the hydrogen atom of the chain hydrocarbon moiety (hereinafter also referred to as "compound (A1)"), for example, a chain hydrocarbon tetraol For example, alkanetetraols, such as pentaerythritol, chain hydrocarbon triols, such as alkane triols, such as glycerol, and chain hydrocarbon diols, such as alkane diols, such as diols.

(A2) A compound having a chain hydrocarbon moiety and one carboxyl group which replaces the hydrogen atom of the above-mentioned chain hydrocarbon moiety (hereinafter also referred to as "compound (A2)"), for example, one hydrogen atom on a hydrocarbon A compound substituted with one carboxy group (-COOH), for example, a fatty acid.

The compound (A) may, for example, be an ester of (a ₁ ) chain hydrocarbon tetraol with at least one fatty acid, (a ₂ ) a chain hydrocarbon triol with at least one fatty acid ester, and (a ₃ ) a chain hydrocarbon. An ester of a diol with at least one fatty acid.

[(a ₁ ) an ester of a chain hydrocarbon tetraol with at least one fatty acid]

The ester of the above chain hydrocarbon tetraol and at least one fatty acid can be exemplified by the following formula (1): a tetraester of pentaerythritol and a fatty acid, the following formula (2): a pentaerythritol and a fatty acid triester, the following formula (3): Diester of pentaerythritol and 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)

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 is not particularly limited as long as the ester of pentaerythritol and a fatty acid satisfies the requirements of the above IOB, melting point, and water solubility. For example, a saturated fatty acid, for example, a C ₂ - C ₃₀ saturated fatty acid, such as acetic acid (C ₂ ) (C ₂ represents a carbon number, and is equivalent to a carbon number of R ¹ C, R ² C, R ³ C or R ⁴ C, the same applies hereinafter) , 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, such as 2-A Butyric acid (C ₅ ), 2,2-dimethylpropane acid (C ₅ ), hexane acid (C ₆ ), heptanoic acid (C ₇ ), octanoic acid (C ₈ ) and their isomers For example, 2-ethylhexane acid (C ₈ ), decanoic acid (C ₉ ), decanoic acid (C ₁₀ ), dodecanoic acid (C ₁₂ ), myristic acid (C ₁₄ ), ten Hexanoic acid (C ₁₆ ), heptadecanoic acid (C ₁₇ ), octadecanoic acid (C ₁₈ ), eicosanoic acid (C ₂₀ ), behenic acid (C ₂₂ ), tetracosanoic acid (C ₂₄ ), dihexadecanoic acid (C ₂₆ ), octadecanoic acid (C ₂₈ ), tridecanoic acid (C ₃₀ ), and the like, and the isomers thereof (other than the above).

The above fatty acid may be an unsaturated fatty acid. The above unsaturated fatty acid may, for example, be a C ₃ - C ₂₀ unsaturated fatty acid such as a monounsaturated fatty acid such as crotonic acid (C ₄ ), tetradecenoic acid (C ₁₄ ) or hexadecenoic acid (C _16). ), oleic acid (C ₁₈ ), trans-octadecenoic acid (C ₁₈ ), octadecenoic acid (C ₁₈ ), eicosenoic acid (C ₂₀ ), eicosenoic acid (C ₂₀ ), etc. a di-unsaturated fatty acid such as linoleic acid (C ₁₈ ), eicosadienoic acid (C ₂₀ ), etc., a triunsaturated fatty acid such as linoleic acid, such as α-linolenic acid (C ₁₈ ) and γ- Linoleic acid (C ₁₈ ), pine nut oleic acid (C ₁₈ ), tung oil, such as α-tricoleic acid (C ₁₈ ) and β-ternic acid (C ₁₈ ), metic acid (C ₂₀ ), di- γ - linoleic acid (C ₂₀ ), eicosatrienoic acid (C ₂₀ ), etc., tetraunsaturated fatty acids, such as stearic acid (C ₂₀ ), arachidonic acid (C ₂₀ ), twenty carbon four Acetate (C ₂₀ ), etc., penta-unsaturated fatty acids, such as bosseopentaenoic acid (C ₁₈ ), eicosapentaenoic acid (C ₂₀ ), etc., and some of these hydrogen additions Things.

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

Further, as the ester of pentaerythritol and a fatty acid, in order to make IOB smaller and more hydrophobic, a diester, a triester or a tetraester is preferred, a triester or a tetraester is more preferable, and a tetraester is more preferable.

In the above tetrakis pentaerythritol and a fatty acid tetraester, the total number of carbon atoms of the fatty acid constituting the tetraester of pentaerythritol and the fatty acid, that is, the R ¹ C, R ² C, R ³ C and R ⁴ C portions in the above formula (1) When the total carbon number is 15, the IOB becomes 0.60. Therefore, in the case where the above-mentioned pentaerythritol and the fatty acid tetraester have a total carbon number of about 15 or more, the IOB satisfies the requirements of about 0.00 to about 0.60.

In the above tetraester of pentaerythritol and a fatty acid, for example, pentaerythritol and hexane acid (C ₆ ), heptanoic acid (C ₇ ), octanoic acid (C ₈ ), for example, 2-ethylhexane acid (C ₈ ) may be mentioned. , nonanoic acid (C _9), capric acid (C ₁₀₎ and / or lauric acid (C ₁₂₎ of the tetraester.

In the above-mentioned formula (2), the total number of carbon atoms of the R ¹ C, R ² C and R ³ C moieties is the total number of carbon atoms of the fatty acid triester of the pentaerythritol and the fatty acid. In the case of 19, the IOB became 0.58. Therefore, in the case where the total number of carbon atoms of the above-mentioned pentaerythritol and fatty acid triester and fatty acid is about 19 or more, the IOB satisfies the requirement of about 0.00 to about 0.60.

In the above formula (3), the carbon number of the R ¹ C and R ² C moieties is 22 in total, in the case where the diester of the pentaerythritol and the fatty acid is a total of the carbon number of the fatty acid of the diester of the pentaerythritol and the fatty acid. The IOB became 0.59. Therefore, in the case where the total number of carbon atoms of the above-mentioned pentaerythritol and fatty acid diester and fatty acid is about 22 or more, the IOB satisfies the requirements of about 0.00 to about 0.60.

In the monoester of pentaerythritol and a fatty acid, the carbon number of the fatty acid constituting the monoester of pentaerythritol and a fatty acid, that is, in the above formula (4), when the carbon number of the R ¹ C moiety is 25, the IOB is 0.60. Therefore, in the case where the above-mentioned pentaerythritol and a monoester of a fatty acid have a carbon number of about 25 or more, the IOB satisfies the requirements of about 0.00 to about 0.60.

Also, in the above calculation, the effects of double bonds, triple bonds, iso branches, and tert branches are not considered.

The commercially available product of the ester of the pentaerythritol and the fatty acid may, for example, be UNISTAR H-408BRS or H-2408BRS-22 (mixed product) (above, manufactured by Nippon Oil Co., Ltd.).

[(a ₂ ) an ester of a chain hydrocarbon triol with at least one fatty acid]

The ester of the above chain hydrocarbon triol and at least one fatty acid can be exemplified by the following formula (5): The triglyceride of glycerol and fatty acid, the following formula (6): The diester of glycerol and fatty acid, and the following formula (7): (wherein, R ⁵ to R ⁷ are each a chain hydrocarbon) a monoester of glycerin and a fatty acid.

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 not particularly limited as long as the above-mentioned IOB, melting point, and water solubility are satisfied, for example, "(a ₁ ) The fatty acid exemplified in the ester of a chain hydrocarbon tetraol and at least one fatty acid, that is, a saturated fatty acid or an unsaturated fatty acid, for example, may be denatured by oxidation or the like, and may be derived from a saturated fatty acid. An ester of glycerin with a fatty acid, that is, an ester of glycerin and a saturated fatty acid is preferred.

Further, in order to make the IOB smaller and more hydrophobic, the ester of the glycerin and the fatty acid is preferably a diester or a triester, and more preferably a triester.

The above triglyceride of glycerol and fatty acid, also known as triglyceride, such as triester of glycerol and octanoic acid (C ₈ ), triester of glycerol and decanoic acid (C ₁₀ ), glycerol and dodecanoic acid (C ₁₂ a triester, and a triester of glycerin with two or three fatty acids, and mixtures thereof.

Examples of the glycerin and the triester of two or more kinds of fatty acids include triglycerides of glycerol and octanoic acid (C ₈ ) and decanoic acid (C ₁₀ ), glycerin and octanoic acid (C ₈ ), and decanoic acid ( C ₁₀ ) and the triester of dodecanoic acid (C ₁₂ ), glycerol and octanoic acid (C ₈ ), decanoic acid (C ₁₀ ), dodecanoic acid (C ₁₂ ), myristic acid (C ₁₄ ), a triester of palmitic acid (C ₁₆ ) and octadecanoic acid (C ₁₈ ).

In the above-mentioned glycerin and fatty acid triester, in order to make the melting point be lower than about 45 ° C, the carbon number of the fatty acid constituting the triester of glycerin and fatty acid is total, that is, in the formula (5), R ⁵ C, R ⁶ C and R ^The total carbon number of the ⁷ C portion is preferably about 40 or less.

Further, in the above-mentioned triglyceride of glycerin and fatty acid, the carbon number of the fatty acid constituting the triester of glycerin and fatty acid is total, that is, the total carbon number of the R ⁵ C, R ⁶ C and R ⁷ C portions in the formula (5) In the case of 12, the IOB becomes 0.60. Therefore, in the case where the total number of carbon atoms of the glycerin and the fatty acid triester and the fatty acid is about 12 or more, the IOB satisfies the requirement of about 0.00 to about 0.60.

The above-mentioned triglyceride of glycerin and fatty acid is a so-called fat because of the structure The composition of the adult body is better in terms of safety.

The commercially available product of the above-mentioned glycerin and fatty acid triester may, for example, be tricocohol fatty acid glyceride, NA36, Panasee 800, Panasee 800B and Panasee 810S, and tri C2L oil fatty acid glyceride and tri-CL oil fatty acid glyceride (above, Nippon Oil Co., Ltd.) and so on.

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 ₁₆ a diester, and a diester of glycerin and two fatty acids, and mixtures thereof.

In the case where the glycerin and the fatty acid diester are combined with the carbon number of the fatty acid constituting the diester of the glycerin and the fatty acid, that is, in the formula (6), when the total carbon number of the R ⁵ C and R ⁶ C moieties is 16, IOB Become 0.58. Therefore, in the case where the total number of carbon atoms of the glycerin and the fatty acid diester and the fatty acid is about 16 or more, the IOB satisfies the requirements of about 0.00 to about 0.60.

The monoester of the above glycerin and fatty acid is also called a monoglyceride, for example, a monoalcoholic acid (C ₂₀ ) monoester of glycerin, a behenic acid (C ₂₂ ) monoester of glycerin or the like.

In the case where the monoester of glycerin and a fatty acid constitutes a carbon number of a fatty acid which constitutes a monoester of glycerin and a fatty acid, that is, in the formula (7), when the carbon number of the R ⁵ C moiety is 19, IOB is 0.59. Therefore, in the case where the carbon number of the glycerin and the fatty acid monoester and the fatty acid is about 19 or more, the IOB satisfies the requirements of about 0.00 to about 0.60.

[(a ₃ ) an ester of a chain hydrocarbon diol with at least one fatty acid]

The ester of the chain hydrocarbon diol and at least one fatty acid may, for example, be a C ₂ -C ₆ chain hydrocarbon diol, for example, a C ₂ -C ₆ diol such as ethylene glycol, propylene glycol or butylene glycol. a monoester or diester of pentanediol or hexanediol with a fatty acid.

Specifically, the ester of the above chain hydrocarbon diol and at least one fatty acid can be exemplified by 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 are each a chain hydrocarbon; a diester of a C ₂ -C ₆ diol and a fatty acid, and a formula (9): R ⁸ COOC _k H _2k OH (9) (wherein k is 2 to 6) An integer of the formula, and R ⁸ is a chain hydrocarbon) of a C ₂ -C ₆ diol and a monoester of a fatty acid.

Among the above-mentioned esters of C ₂ -C ₆ diols and fatty acids, it is desired to esterify fatty acids (in the formulas (8) and (9), which are equivalent to R ⁸ COOH and R ⁹ COOH), C ₂ -C ₆ diols and fatty acids. The ester is not particularly limited as long as it satisfies the above requirements for IOB, melting point and water solubility, for example, the fatty acid listed in "(a ₁ ) chain hydrocarbon tetraol and at least one fatty acid ester", that is, saturated fatty acid and unsaturated For fatty acids, it is preferred to use saturated fatty acids in consideration of the possibility of denaturation by oxidation or the like.

When the total number of carbon atoms of the butanediol (k=4) represented by the formula (8) and the diester of the fatty acid and the R ⁸ C and R ⁹ C moieties is 6, the IOB becomes 0.60. Therefore, in the case where the butanediol (k=4) represented by the formula (8) and the diester of the fatty acid have a total carbon number of about 6 or more, the IOB satisfies the requirements of about 0.00 to about 0.60. Further, in the case of the ethylene glycol (k=2) represented by the formula (9) and the monoester of the fatty acid, and the carbon number of the R ⁸ C moiety is 12, the IOB is 0.57. Therefore, in the case of the ethylene glycol (k=2) represented by the formula (9) and the monoester of the fatty acid, and the carbon number of the fatty acid is about 12 or more, the IOB satisfies the requirement of about 0.00 to about 0.60.

In the case of the above-mentioned ester of a C ₂ -C ₆ diol and a fatty acid, considering the possibility of denaturation by oxidation or the like, an ester of a C ₂ -C ₆ diol derived from a saturated fatty acid and a fatty acid, that is, a C ₂ -C ₆ II Esters of alcohols and saturated fatty acids are preferred.

Further, in terms of the ester of the C ₂ -C ₆ diol and the fatty acid, in order to make the IOB smaller and more hydrophobic, an ester of an alcohol and a fatty acid derived from a diol having a large carbon number, for example, from butanediol or pentane Esters of alcohols and fatty acids of diol or hexanediol are preferred.

Further, in terms of the ester of the C ₂ -C ₆ diol and the fatty acid, in order to make the IOB smaller and more hydrophobic, a diester is preferred.

The commercially available product of the above-mentioned ester of a C ₂ -C ₆ diol and a fatty acid may, for example, be a Cobopol BL or a Cotomboru BS (above, manufactured by Nippon Oil Co., Ltd.).

[(B) (B1) a compound having a chain hydrocarbon moiety and 2 to 4 hydroxyl groups which replace the hydrogen atom of the above-mentioned chain hydrocarbon moiety, and (B2) having a chain hydrocarbon moiety and a hydrogen atom replacing the above chain hydrocarbon moiety; Ether of a hydroxy compound]

(B) (B1) a compound having a chain hydrocarbon moiety and 2 to 4 hydroxyl groups which replace the hydrogen atom of the above-mentioned chain hydrocarbon moiety, and (B2) having a chain hydrocarbon moiety The ether of the compound which is substituted with one hydroxyl group of the hydrogen atom of the above-mentioned chain hydrocarbon moiety (hereinafter, also referred to as "compound (B)") may have a hydroxyl group which has the above-mentioned IOB, melting point and water solubility. Etherification.

(B1) The compound having a chain hydrocarbon moiety and 2 to 4 hydroxyl groups which replace the hydrogen atom of the above-mentioned chain hydrocarbon moiety, for example, "the compound (A)", as a compound (A1), for example, pentaerythritol, Glycerin, and diol.

(B2) A compound having a chain hydrocarbon moiety and a hydroxyl group which replaces the hydrogen atom of the chain hydrocarbon moiety (hereinafter, also referred to as "compound (B2)"), for example, one hydrogen atom of a hydrocarbon is A compound substituted with one hydroxy group (-OH), for example, an aliphatic monohydric alcohol, for example, a saturated aliphatic monohydric alcohol and an unsaturated aliphatic monohydric alcohol.

The saturated aliphatic monohydric alcohol may, for example, be 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), and 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 ), mercapto alcohol (C ₉ ), mercapto alcohol (C ₁₀ ), dodecyl alcohol (C ₁₂ ), tetradecyl alcohol (C ₁₄ ), hexadecanol (C ₁₆ ), seventeen alcohol (C _17), octadecyl alcohol (C _18), and eicosyl alcohol (C _20), and of these isomers thereof not enumerated.

The unsaturated aliphatic monohydric alcohol may, for example, be one in which a C-C single bond of the above saturated aliphatic monohydric alcohol is substituted with a C=C double bond. For example, oleyl alcohol, such as New Japan Physical and Chemical Co., Ltd., is sold under the Rikacol series and the Agilent series.

The compound (B) may, for example, be an ether of a (b ₁ ) chain hydrocarbon tetraol and at least one aliphatic monohydric alcohol, for example, a monoether, a diether, a triether and a tetraether, preferably a diether or a triether. And a tetraether, more preferably a triether and a tetraether, more preferably a tetraether, (b ₂ ) a chain hydrocarbon triol and an ether of at least one aliphatic monohydric alcohol, such as a monoether, a diether and a triether, preferably diether ether and three, three and more preferably an ether, and (b ₃₎ a chain hydrocarbon diol and at least one of an aliphatic monohydric alcohol ethers, monoethers and diethers, for example, and preferably two ether.

The ether of the above chain hydrocarbon tetraol and at least one aliphatic monohydric alcohol can be exemplified by the following formulas (10) to (13): (wherein, R ¹⁰ to R ¹³ are each a chain hydrocarbon) a pentaerythritol and an aliphatic monohydric alcohol, a tetraether, a triether, a diether, and a monoether.

The ether of the above chain hydrocarbon triol and at least one aliphatic monohydric alcohol can be exemplified by the following formulas (14) to (16): (wherein, R ¹⁴ to R ¹⁶ are each a chain hydrocarbon) glycerol and an aliphatic monohydric alcohol triether, diether and monoether.

The ether of the above chain hydrocarbon diol and at least one aliphatic monohydric alcohol can be exemplified by 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 are each a chain hydrocarbon (C ₂ -C ₆ diol) and an aliphatic 1 -valent alcohol diether, and the following formula (18): R ¹⁷ OC _n H _2n OH (18) (wherein n is an integer of 2 to 6, and R ¹⁷ is a chain hydrocarbon (C ₂ -C ₆ diol) and a monoether of an aliphatic monohydric alcohol.

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 and R ¹¹ in the above formula (10) When the total carbon number of the R ¹² and R ¹³ portions is 4, the IOB becomes 0.44. Therefore, when the total number of carbon atoms of the above-mentioned pentaerythritol and the aliphatic monohydric alcohol and the aliphatic monohydric alcohol is about 4 or more, the IOB satisfies the requirements of about 0.00 to about 0.60.

The total number of carbon atoms of the aliphatic monohydric alcohol forming the pentaerythritol and the triether of the aliphatic monohydric alcohol in the above-mentioned pentaerythritol and the aliphatic trihydric alcohol triol, that is, in the above formula (11), R ¹⁰ and R ¹¹ When the total carbon number of the R ¹² portion is 9, the IOB becomes 0.57. Therefore, in the case where the total number of carbon atoms of the above-mentioned pentaerythritol and the aliphatic trihydric alcohol and the aliphatic monohydric alcohol is about 9 or more, the IOB satisfies the requirements of about 0.00 to about 0.60.

In the diether of the pentaerythritol and the aliphatic monohydric alcohol, the carbon number of the aliphatic monohydric alcohol constituting the diether of the pentaerythritol and the aliphatic monohydric alcohol, that is, R ¹⁰ and R ¹¹ in the above formula (12) When the total carbon number is 15 in total, the IOB becomes 0.60. Therefore, when the total number of carbon atoms of the above-mentioned pentaerythritol and the aliphatic dihydric alcohol and the aliphatic monohydric alcohol is about 15 or more, the IOB satisfies the requirements of about 0.00 to about 0.60.

The carbon number of the aliphatic monohydric alcohol which constitutes the monoether of pentaerythritol and the aliphatic monohydric alcohol in 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) For the case of 22, the IOB becomes 0.59. Therefore, in the case where the carbon number of the above-mentioned pentaerythritol and the aliphatic monohydric alcohol and the aliphatic monohydric alcohol is about 22 or more, the IOB satisfies the requirements of about 0.00 to about 0.60.

Further, in the triether of the glycerin and the aliphatic monohydric alcohol, the carbon number of the aliphatic monohydric alcohol constituting the triether of glycerin and the aliphatic monohydric alcohol, that is, R ¹⁴ and R in the formula (14) ^{When the} total carbon number of the ¹⁵ and R ¹⁶ portions is 3, the IOB becomes 0.50. Therefore, when the total number of carbon atoms of the glycerin and the aliphatic triol and the aliphatic monohydric alcohol is about 3 or more, the IOB satisfies the requirements of about 0.00 to about 0.60.

In the diether of the glycerin and the aliphatic monohydric alcohol, the carbon number of the aliphatic monohydric alcohol constituting the diether of the glycerin and the aliphatic monohydric alcohol, that is, the R ¹⁴ and R ¹⁵ portions in the formula (15) When the total carbon number is 9, the IOB becomes 0.58. Therefore, in the case where the total number of carbon atoms of the glycerin and the aliphatic dihydric alcohol and the aliphatic monohydric alcohol is about 9 or more, the IOB satisfies the requirements of about 0.00 to about 0.60.

In the monoether of the glycerin and the aliphatic monohydric alcohol, the carbon number of the aliphatic monohydric alcohol constituting the monoether of the glycerin and the aliphatic monohydric alcohol, that is, in the formula (16), the carbon number of the R ¹⁴ moiety is On the 16th occasion, the IOB became 0.58. Therefore, in the case where the carbon number of the monoglyceride of the glycerin and the aliphatic monohydric alcohol and the aliphatic monohydric alcohol is about 16 or more, the IOB satisfies the requirement of about 0.00 to about 0.60.

When the total number of carbon atoms of the diphenyl diol (n = 4) represented by the formula (17) and the diester of the aliphatic monohydric alcohol and the R ¹⁷ and R ¹⁸ portions is 2, the IOB is 0.33. Therefore, when the total number of carbon atoms of the butanediol (n=4) represented by the formula (17) and the diester of the aliphatic monohydric alcohol and the aliphatic monohydric alcohol is 2 or more, the IOB satisfies about 0.00 to about 0.60. The essentials. Further, in the case of the ethylene glycol (n = 2) represented by the formula (18) and the monoether of the aliphatic monohydric alcohol, when the carbon number of the R ¹⁷ moiety is 8, the IOB is 0.60. Therefore, in the case where the ethylene glycol (n=2) represented by the formula (18) and the monoether of the aliphatic monohydric alcohol and the aliphatic monohydric alcohol have a carbon number of about 8 or more, the IOB satisfies about 0.00 to about 0.60. The essentials.

The compound (B) can be produced by subjecting the compound (B1) and the compound (B2) to dehydration condensation in the presence of an acid catalyst.

[(C)(C1) a carboxylic acid, a hydroxy acid, an alkoxy acid or a oxo acid having a chain hydrocarbon moiety and 2 to 4 carboxyl groups which replace the hydrogen atom of the above-mentioned chain hydrocarbon moiety, and (C2) have a chain shape An ester of a hydrocarbon moiety and a compound substituted with one hydroxyl group of a hydrogen atom of the above-mentioned chain hydrocarbon moiety]

(C) (C1) a carboxylic acid, a hydroxy acid, an alkoxy acid or a pendant oxyacid having a chain hydrocarbon moiety and 2 to 4 carboxyl groups which replace the hydrogen atom of the above-mentioned chain hydrocarbon moiety, and (C2) having a chain hydrocarbon An ester of a compound partially substituted with one hydroxyl group of a hydrogen atom of the above-mentioned chain hydrocarbon moiety (hereinafter also referred to as "compound (C)") may have a carboxyl group which may have a carboxyl group having a melting point and a water solubility as described above. Esterification.

(C1) a carboxylic acid, a hydroxy acid, an alkoxy acid or a side oxyacid containing a chain hydrocarbon moiety and a 2-4 carboxyl group which replaces the hydrogen atom of the above-mentioned chain hydrocarbon moiety (hereinafter, also referred to as "compound (C1)" In the case of the chain, a chain hydrocarbon carboxylic acid having 2 to 4 carboxyl groups, for example, a chain hydrocarbon dicarboxylic acid, for example, an alkane dicarboxylic acid such as ethane diacid, propane diacid, butanedioic 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 triacid, butane Triacid, pentanetricarboxylic acid, hexanetricarboxylic acid, heptanetricarboxylic acid, octanetricarboxylic acid, decanetricarboxylic acid and decanetricarboxylic acid, and chain hydrocarbon tetracarboxylic acid, such as an alkanetetracarboxylic acid, such as butane Tetraacid, pentanetetracarboxylic acid, hexanetetracarboxylic acid, heptanetetracarboxylic acid, octane tetracarboxylic acid, decanetetracarboxylic acid, and decanetetracarboxylic acid.

Further, the compound (C1) includes a chain hydrocarbon hydroxy acid having 2 to 4 carboxyl groups, for example, a chain hydrocarbon alkoxy acid having 2 to 4 carboxyl groups, such as malic acid, tartaric acid, citric acid or isocitric acid. For example, O-acetyl citrate and a chain hydrocarbon side oxyacid having 2 to 4 carboxyl groups.

(C2) The compound having a chain hydrocarbon moiety and a hydroxyl group which replaces the hydrogen atom of the chain hydrocarbon moiety, for example, those listed in "Compound (B)", for example, an aliphatic monohydric alcohol.

The compound (C) may, for example, be (c ₁ ) a chain hydrocarbon tetracarboxylic acid having four carboxyl groups, a hydroxy acid, an alkoxy acid or an ester of a side acid and at least one aliphatic monohydric alcohol, for example, a monoester. , diester, triesters and tetraesters, preferably diesters, triesters and tetraesters, more preferably triesters and triesters, more preferably tetraesters, (c ₂ ) chain hydrocarbons having 3 carboxyl groups An ester of a carboxylic acid, a hydroxy acid, an alkoxy acid or a oxo acid with at least one aliphatic monohydric alcohol, such as a monoester, a diester or a triester, preferably a diester and a triester, and more preferably three. And an ester of (c ₃ ) a chain hydrocarbon dicarboxylic acid having two carboxyl groups, a hydroxy acid, an alkoxy acid or a oxo acid with at least one aliphatic monohydric alcohol, such as a monoester or a diester, Jia is a diester.

Examples of the compound (C) include commercially available products such as dioctyl adipate, tributyl butyl ethoxide and the like.

[(D) an ether bond (-O-), a carbonyl bond (-CO-), an ester bond (-COO-) having a chain hydrocarbon moiety and a CC single bond intercalated with the above chain hydrocarbon moiety, and a compound selected from a group of carbonate linkages (-OCOO-)]

(D) an ether bond (-O-), a carbonyl bond (-CO-), an ester bond (-COO-), and a carbonic acid having a chain hydrocarbon moiety and a CC single bond intercalated with the above chain hydrocarbon moiety Any of the compounds selected in the group in which the ester bond (-OCOO-) is selected (hereinafter, also referred to as "compound (D)"), for example, (d ₁ ) aliphatic monohydric alcohol and fat An ether of a monohydric alcohol, a (d ₂ ) dialkyl ketone, an ester of a (d ₃ ) fatty acid and an aliphatic monohydric alcohol, and (d ₄ ) a dialkyl carbonate.

[(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 may, for example, be a compound having the following formula (19): R ¹⁹ OR ²⁰ (19) (wherein each of R ¹⁹ and R ²⁰ is a chain hydrocarbon).

In the case of the aliphatic monohydric alcohol (equivalent to R ¹⁹ OH and R ²⁰ OH in the formula (19)), the ether is not particularly limited as long as it satisfies the above-mentioned requirements for IOB, melting point and water solubility, and for example, The aliphatic monohydric alcohol exemplified in the compound (B).

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, that is, in the above formula (19), the total carbon number of the R ¹⁹ and R ²⁰ moieties is In the case of 2, since the IOB is 0.50, the total number of carbon atoms is about 2 or more, and the requirements of the above IOB are satisfied. However, the total carbon number is about 6, and the water solubility is about 2 g higher, which is also problematic from the viewpoint of vapor pressure. In order to satisfy the requirement that the water solubility is from about 0.00 to about 0.05 g, the total carbon number is preferably about 8 or more.

[(d ₂ )dialkyl ketone]

The dialkyl ketone may, for example, be a compound having the following formula (20): R ²¹ COR ²² (20) (wherein each of R ²¹ and R ²² is an alkyl group).

In the case where the total number of carbon atoms of R ²¹ and R ²² is 5, the IOB is 0.54. Therefore, if the total number of carbon atoms is about 5 or more, the requirements of the above IOB are satisfied. However, the total carbon number is about 5, and the water solubility is as high as about 2 g. Therefore, in order to satisfy the requirement that the water solubility is from about 0.00 to about 0.05 g, it is preferred that the total carbon number is about 8 or more. Further, when the vapor pressure is considered, the carbon number is preferably about 10 or more, and more preferably about 12 or more.

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

The above dialkyl ketone can be obtained by a conventional method, for example, by oxidizing a second-stage alcohol with chromic acid or the like, in addition to a commercially available one.

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

The ester of the fatty acid and the aliphatic monohydric alcohol may, for example, be a compound having the following formula (21): 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)) may, for example, be a fatty acid as exemplified in the "(a ₁ ) chain hydrocarbon tetraol and at least one fatty acid ester", that is, a saturated fatty acid. Or unsaturated fatty acids, if considering the possibility of denaturation by oxidation, etc., it is preferable to use a saturated fatty acid. The aliphatic monohydric alcohol (e.g., R ²⁴ OH in the formula (21)) constituting the above-mentioned ester may, for example, be an aliphatic monohydric alcohol as exemplified in the "compound (B)".

In addition, in the case where the carbon number of the fatty acid and the aliphatic monohydric alcohol, the fatty acid and the aliphatic monohydric alcohol are in total, that is, in the formula (21), the total carbon number of the R ²³ C and R ²⁴ moieties is 5 When the IOB is 0.60, the total number of carbon atoms in the R ²³ C and R ²⁴ portions is about 5 or more, and the requirements of the above IOB are satisfied. However, for example, in the case of the above-mentioned butyl acetate having a total carbon number of 6, the vapor pressure is as high as more than 2,000 Pa. Therefore, in consideration of the vapor pressure, it is preferred that the total carbon number is about 12 or more. Moreover, when the total carbon number is about 11 or more, the water solubility is about 0.00 to about 0.05 g.

Examples of the ester of the above fatty acid and the aliphatic monohydric alcohol include, for example, an ester of dodecanoic acid (C ₁₂ ) and dodecyl alcohol (C ₁₂ ), myristic acid (C ₁₄ ) and dodecyl alcohol (C _{12 ).} For example, the ester of the above-mentioned fatty acid and the ester of the aliphatic monohydric alcohol may, for example, be an Aurelu WE20 or an Ailelu WE40 (above, manufactured by Nippon Oil Co., Ltd.).

[(d ₄ )Dialkyl carbonate]

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

In the case where the total number of carbon atoms of R ²⁵ and R ²⁶ is 6 in the above dialkyl carbonate, the IOB is 0.57. Therefore, the total carbon number of R ²⁵ and R ²⁶ is about 6 or more to satisfy the requirements of IOB.

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

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

[(E) Polyoxygenated C _2-6 alkanediol, or its ester or ether]

The polyoxy C _2-6 alkanediol, or an ester or ether thereof (hereinafter, in the case of the compound (E)), for example, (e ₁ ) polyoxygenated C _2-6 alkanediol, (e ₂ ) polyoxidation An ester of C _2-6 alkanediol with at least one fatty acid, (e ₃ ) a polyoxy C _2-6 alkanediol and an ether of at least one aliphatic monohydric alcohol, (e ₄ ) a polyoxygenated C _2-6 An alkanediol with a chain hydrocarbon tetracarboxylic acid, a chain hydrocarbon tricarboxylic acid, or a chain hydrocarbon dicarboxylic acid ester, and (e ₅ ) a polyoxygenated C _2-6 alkanediol and a chain hydrocarbon tetraol, a chain An ether of a hydrocarbon triol or a chain hydrocarbon diol. The following description will be made.

[(e ₁ ) polyoxygenated C _2-6 alkanediol]

The above polyoxygenated C _2-6 alkanediol refers to i) an oxidized C _2-6 alkene skeleton, that is, having an oxyethylene skeleton, an oxypropylene skeleton, a oxidized butene skeleton, a pentene oxide skeleton, and an oxyhexene oxide. a homopolymer having a skeleton selected from a group of skeletons and having a hydroxyl group at both terminals, ii) a block copolymer having two or more kinds of skeletons selected from the above group and having a hydroxyl group at both terminals, or iii A random copolymer having two or more kinds of skeletons selected from the above groups and having hydroxyl groups at both terminals.

The oxidized C _2-6 alkene skeleton is preferably an oxypropylene skeleton, a oxidized butene skeleton, a pentene oxide skeleton, or an oxyhexene skeleton from the viewpoint of a decrease in IOB of the polyoxygenated C _2-6 alkanediol. The oxidized butene skeleton, the pentene oxide skeleton, or the hexene oxide skeleton is more preferable.

The polyoxygenated C _2-6 alkanediol can be represented by the following formula (23): HO-(C _m H _2m O) _n -H (23) (wherein m is an integer of 2 to 6).

Moreover, the inventors of the present invention confirmed that when polyethylene glycol (the homopolymer of m=2 in the formula (23)) is n≧45 (weight average molecular weight is more than 2,000), it satisfies about 0.00 to about 0.60. The requirements of the IOB, but even where the weight average molecular weight exceeds about 4,000, the water solubility requirements are not met. Therefore, it is considered that (e ₁ ) polyoxygenated C _2-6 alkanediol does not contain a homopolymer of ethylene glycol, and ethylene glycol should be used as a block copolymer or random copolymer with other diols. Included in (e ₁ ) polyoxy C _2-6 alkanediol.

Therefore, the homopolymer of the formula (23) may contain a homopolymer of propylene glycol, butanediol, pentanediol or hexanediol.

From the above, in the formula (23), m is from about 3 to about 6, more preferably from about 4 to about 6, and n is 2 or more.

In the above formula (23), the value of n is a poly C _2-6 alkanediol having an IOB of from about 0.00 to about 0.60, a melting point of about 45 ° C or less, and a water of from about 0.00 to about 0.05 g for 100 g of water at 25 ° C. The value of the solubility.

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

Further, when the formula (21) is polytetramethylene glycol (m=4 homopolymer), when n=7, IOB is 0.57. Therefore, when the formula (23) is polytetramethylene glycol (m=4 homopolymer), when n≧ is about 7, the requirements of the above IOB are satisfied.

The weight average molecular weight of the polyoxy C _4-6 alkanediol is preferably from about 200 to about 10,000, more preferably from about 250 to about 8,000, still more preferably from about 250 to about 5,000, from the viewpoints of IOB, melting point and water solubility. The scope.

Further, from the viewpoints of IOB, melting point and water solubility, the weight average molecular weight of the polyoxy C ₃ alkylene glycol, that is, polypropylene glycol, is preferably from about 1,000 to about 10,000, more preferably from about 3,000 to about 8,000, more preferably. It is in the range of about 4,000 to about 5,000. If the weight average molecular weight is less than about 1,000, the water solubility does not conform to the requirements, and the larger the weight average molecular weight, the higher the moving speed of the absorbent and the whiteness of the top sheet tend to increase.

Commercial products of the above-mentioned polyoxygenated C _2-6 alkanediol include, for example, UNIOL (trademark) D-1000, D-1200, D-2000, D-3000, D-4000, PB-500, PB-700, PB-1000 and PB-2000 (above, manufactured by Nippon Oil Co., Ltd.).

[(e ₂ ) an ester of polyoxygenated C _2-6 alkanediol with at least one fatty acid]

The above-mentioned polyoxyalkylene alkylene glycol C _{2 ~ 6} with at least one ester of a fatty acid includes, for example in "(e ₁₎ polyoxy C _{2 ~ 6} alkanediol" described polyoxyalkylene C _{2 ~ 6} alkanediols One or both of the OH ends are esterified with fatty acids, that is, monoesters and diesters.

In the ester of polyoxy C _2-6 alkanediol and at least one fatty acid, the fatty acid to be esterified, for example, the fatty acid listed in "(a ₁ ) chain hydrocarbon tetraol and at least one fatty acid ester", That is, a saturated fatty acid or an unsaturated fatty acid is preferably a saturated fatty acid in consideration of the possibility of denaturation by oxidation or the like.

A commercially available product of the above-mentioned ester of a polyoxy-C _2-6 alkanediol and a fatty acid is, for example, WILBRIDE cp9 (manufactured by Nippon Oil Co., Ltd.).

[(e ₃ ) an ether of polyoxygenated C _2-6 alkanediol and at least one aliphatic monohydric alcohol]

The above-mentioned polyoxyalkylene alkylene glycol C _{2 ~ 6} with at least one of an aliphatic monohydric alcohol ether includes, for example, "(e ₁₎ polyoxy C _{2 ~ 6} alkanediol" described in the polyoxyalkylene C _{2 ~ 6} One or both of the OH ends of the alkanediol are etherified with an aliphatic monohydric alcohol, that is, a monoether and a diether.

In the ether of the polyoxygenated C _{2 - 6} alkanediol and the at least one aliphatic monohydric alcohol, the aliphatic monohydric alcohol to be etherified may, for example, be an aliphatic monohydric alcohol listed in the "compound (B)". .

[(e ₄ ) an ester of polyoxygenated C _2-6 alkanediol with a chain hydrocarbon tetracarboxylic acid, a chain hydrocarbon tricarboxylic acid, or a chain hydrocarbon dicarboxylic acid]

In the ester of the polyoxy C _2-6 alkanediol and the chain hydrocarbon tetracarboxylic acid, the chain hydrocarbon tricarboxylic acid, or the chain hydrocarbon dicarboxylic acid, the polyoxy C _2-6 alkanediol may be esterified. among the Examples as "(e ₁₎ polyoxy C _{2 ~ 6} alkanediol" described polyoxyalkylene C _{2 ~ 6} alkanediol. Further, the chain hydrocarbon tetracarboxylic acid, the chain hydrocarbon tricarboxylic acid, and the chain hydrocarbon dicarboxylic acid are preferably esterified, for example, as described in "(Compound (C)".

The above-mentioned polyoxy C _2-6 alkanediol and an ester of a chain hydrocarbon tetracarboxylic acid, a chain hydrocarbon tricarboxylic acid, or a chain hydrocarbon dicarboxylic acid may be a chain hydrocarbon tetracarboxylic acid or a chain, in addition to a commercially available product. The hydrocarbon hydrocarbon tricarboxylic acid or the chain hydrocarbon dicarboxylic acid and the oxidized C _2-6 alkanediol are produced by polycondensation under a known condition.

[(e ₅ ) polyoxygenated C _2-6 alkanediol and chain hydrocarbon tetraol, chain hydrocarbon triol, or ether of chain hydrocarbon diol]

In the ether of the polyoxy C _2-6 alkanediol and the chain hydrocarbon tetraol, the chain hydrocarbon triol or the chain hydrocarbon diol, the polyoxy C _2-6 alkanediol to be etherified may, for example, be mentioned. among "(e ₁₎ polyoxy C _{2 ~ 6} alkanediol" described polyoxyalkylene C _{2 ~ 6} alkanediol. Further, examples of the chain hydrocarbon tetraol, the chain hydrocarbon triol, and the chain hydrocarbon diol to be etherified include "the compound (A)", for example, pentaerythritol, glycerin, and a diol.

Commercial products of the above-mentioned polyoxy C _2-6 alkanediol and a chain hydrocarbon tetraol, a chain hydrocarbon triol or a chain hydrocarbon diol may, for example, be UNILUBE (trademark) 5 TP-300 KB, and UNIOL ( Trademarks) TG-3000 and TG-4000 (made by Nippon Oil Co., Ltd.).

UNILUBE (Trade Mark) 5TP-300KB is a compound which polycondenses pentaerythritol 1 molar with propylene glycol 65 mole and ethylene glycol 5 mole, and has an IOB of 0.39, a melting point of less than 45 ° C, and a water solubility of less than 0.05 g.

Uniol (trademark) TG-3000 is a compound in which 50 mer of glycerol 1 molar and propylene glycol 50 is condensed, and has an IOB of 0.42, a melting point of less than 45 ° C, a water solubility of less than 0.05 g, and a weight average molecular weight of about 3,000.

Uniol (trademark) TG-4000 is a compound in which glycerol 1 molar is condensed with propylene glycol 70, having an IOB of 0.40, a melting point of less than 45 ° C, a water solubility of less than 0.05 g, and a weight average molecular weight of about 4,000.

The polyoxy C _2-6 alkanediol and the chain hydrocarbon tetraol, the chain hydrocarbon triol, or the ether of the chain hydrocarbon diol can be further obtained by chain hydrocarbon tetraol, chain hydrocarbon triol, or The chain hydrocarbon diol and C _2-6 alkylene oxide are produced by addition under conventional conditions.

[(F) chain hydrocarbon]

The chain hydrocarbon may be contained in the blood modifying agent because the inorganic value is 0, the IOB is 0.00, and the water solubility is about 0 g. Therefore, the melting point is about 45 ° C or lower. Examples of the chain hydrocarbons include (f ₁ ) chain alkanes, for example, linear alkanes and branched paraffins. For example, in the case of linear alkanes, when the melting point is about 45 ° C or less, the carbon number is 22 or less. . Further, when the vapor pressure is considered, it is likely to contain a carbon number of 13 or more. In the case of a branched paraffin, since the melting point is low in the same carbon number as the linear alkane, it is also possible to include a carbon number of 22 or more.

The commercial product of the above hydrocarbons may, for example, be PARLEAM6 (Nippon Oil Co., Ltd.).

The blood modifying agent of the present invention was examined in detail together with the examples, and was found to have at least a function of lowering blood viscosity and surface tension. The menstrual blood to be absorbed by the absorbent article is compared with the general blood, and the blood cells are connected to each other by the proteins such as the endometrial wall, and the blood cells are easily in a state of continuous alignment. Therefore, when the menstrual blood to be absorbed by the absorbent article tends to become highly viscous and the top sheet is non-woven or woven, the menstrual blood tends to block between the fibers, and the user tends to feel sticky, and the blood spreads on the surface of the top sheet. It becomes easy to leak. In this case, by applying the blood modifying agent of the present invention to the top sheet, the menstrual blood between the fibers of the top sheet is not easily blocked, and the menstrual blood can be quickly moved from the top sheet to the absorbent body.

It is considered that the blood modifying agent of the present invention having an IOB of about 0.00 to about 0.60 has high organicity and easily enters between blood cells, and the blood cells can be stabilized, and the blood cells are less likely to form a linked structure. It is considered that the blood modifying agent of the present invention makes it easy to absorb menstrual blood by calming the blood cells and making the blood cells difficult to form a linked structure. For example, an acrylic high-absorbent polymer is known, that is, in an absorbent article containing SAP, which absorbs menstrual blood, the continuously arranged blood cells coat the surface of the SAP, and it becomes difficult for SAP to exert absorption performance, but by stabilizing the blood cells, SAP It becomes easy to exert absorption performance. Further, it is considered that the red blood cell membrane is not easily destroyed by the blood modifying agent having a high affinity with red blood cells to protect the red blood cell membrane.

The blood modifying agent of the present invention has a weight of about 2,000 or less The amount average molecular weight is preferably and the weight average molecular weight of 1,000 or less is more preferable. When the weight average molecular weight is increased, the viscosity of the blood modifying agent becomes difficult to fall to a viscosity suitable for coating, and it is required to be diluted with a solvent. Further, when the weight average molecular weight is increased, the blood modifying agent is sticky and gives the user an unpleasant feeling.

According to the following examples, it was confirmed that the blood modifying agent has a function of lowering the viscosity and surface tension of blood.

[Examples]

Hereinafter, the present invention will be exemplified, but the present invention is not limited to these examples.

[example 1] [Data of blood modifying agent]

Prepare commercially available sanitary napkins. The sanitary tampon is a top sheet formed by a hot air non-woven fabric treated with a hydrophilic agent (composite fiber composed of polyester and polyethylene terephthalate, and a flat weight: 35 g/m ² ), and a hot air non-woven fabric (polymerized) a composite fiber composed of an ester and a polyethylene terephthalate, a flat sheet of 30 g/m ² ), a pulp (powder: 150 to 450 g/m ² , a large central portion), and acrylic acid It is formed of a high-absorbent polymer (pound amount: 15 g/m ² ) and a back sheet composed of an absorbent body containing a fabric as a core cladding, a water-repellent-treated side sheet, and a polyethylene film.

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

[(a ₁ ) an ester of a chain hydrocarbon tetraol with at least one fatty acid] . UNISTAR H-408BRS, manufactured by Nippon Oil Co., Ltd.

Tetrakilyl tetraethyl 4-hexyl carboxylate, weight average molecular weight: about 640

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

Mixture of pentaerythritol tetrakis(2-ethyl)hexane acid and neopentyl glycol di-2-ethylhexaneate (58:42, weight ratio), weight average molecular weight: about 520

[(a ₂ ) an ester of a chain hydrocarbon triol with at least one fatty acid] . Cetiol SB45DEO, manufactured by Cognis Japan Ltd.

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

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

C ₁₄ fatty acids: C ₁₆ fatty acids: C ₁₈ fatty acids: C ₂₀ fatty acids (including both saturated and unsaturated fatty acids) contain approximately 0.2:11:88:0.8 by weight of glycerol and fatty acid triesters , weight average molecular weight: 880

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

C ₈ fatty acid: C ₁₀ fatty acid: C ₁₂ fatty acid contains about 37:7:56 by weight of glycerol and fatty acid triester, weight average molecular weight: about 570

. Tri-CL oil fatty acid glyceride, manufactured by Nippon Oil Co., Ltd.

C ₈ fatty acid: C ₁₂ fatty acid contains about 44:56 by weight of glycerol and fatty acid triester, weight average molecular weight: about 570

. Panasate 810s, manufactured by Nippon Oil Corporation

C ₈ fatty acid: C ₁₀ fatty acid contains about 85:15 by weight of glycerol and fatty acid triester, weight average molecular weight: about 480

. Panasate 800, manufactured by Nippon Oil Corporation

Fatty acid is all octane acid (C ₈ ) glycerol and fatty acid triester, weight average molecular weight: about 470

. Panasate 800B, manufactured by Nippon Oil Corporation

The fatty acid is all 2-ethyl hexane acid (C ₈ ) glycerol and fatty acid triester, weight average molecular weight: about 470

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

C ₁₆ fatty acids: C ₁₈ fatty acids: C ₂₀ fatty acids (including both saturated and unsaturated fatty acids) contain about 5:92:3 by weight of glycerol and fatty acid triesters, weight average molecular weight: about 880

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

C ₈ fatty acids: C ₁₀ fatty acids: C ₁₂ fatty acids: C ₁₄ fatty acids: C ₁₆ fatty acids (including both saturated and unsaturated fatty acids) contain a weight ratio of about 4:8:60:25:3 Glycerol and fatty acid triester, weight average molecular weight: 670

. Dioctyl octanoate, manufactured by Nippon Oil Co., Ltd.

Fatty acid is a diester of glycerol and fatty acid of octanoic acid, weight average molecular weight: 340

[(a ₃ ) an ester of a chain hydrocarbon diol with at least one fatty acid] . Como Bolu B L, made by Nippon Oil Co., Ltd.

Butyric acid (C ₁₂ ) monoester of butanediol, weight average molecular weight: about 270

. Kemubolu BS, manufactured by Nippon Oil Co., Ltd.

Octadecanoic acid (C ₁₈ ) monoester of butanediol, weight average molecular weight: about 350

. UNISTAR H-208BRS, manufactured by Nippon Oil Co., Ltd.

Diethyl 2-ethylhexane acid neopentyl glycol, weight average molecular weight: about 360

[(c ₂ ) an ester of a chain hydrocarbon tricarboxylic acid having three carboxyl groups, a hydroxy acid, an alkoxy acid or a side acid and at least one aliphatic monohydric alcohol] . O-acetyl tributyl tributyl citrate, manufactured by Tokyo Chemical Industry Co., Ltd.

Weight average molecular weight: about 400

[(c ₃ ) an ester of a chain hydrocarbon dicarboxylic acid having two carboxyl groups, a hydroxy acid, an alkoxy acid or a side acid and at least one aliphatic monohydric alcohol] . Dioctyl adipate, manufactured by Wako Pure Chemical Industries

Weight average molecular weight: about 380

[(d ₃ ) ester of fatty acid with aliphatic monohydric alcohol] . Aileru WE20, made by Nippon Oil Co., Ltd.

Ester of dodecanoic acid (C ₁₂ ) and dodecyl alcohol (C ₁₂ ), weight average molecular weight: about 360

. Aileru WE40, made by Nippon Oil Co., Ltd.

Ester of tetradecanoic acid (C ₁₄ ) and dodecyl alcohol (C ₁₂ ), weight average molecular weight: about 390

[(e ₁ ) polyoxygenated C _2-6 alkanediol] . UNIOL D-1000, manufactured by Nippon Oil Co., Ltd.

Polypropylene glycol, weight average molecular weight: about 1,000

. UNIOL D-1200, manufactured by Nippon Oil Co., Ltd.

Polypropylene glycol, weight average molecular weight: about 1,200

. UNIOL D-3000, manufactured by Nippon Oil Co., Ltd.

Polypropylene glycol, weight average molecular weight: about 3,000

. UNIOL D-4000, manufactured by Nippon Oil Co., Ltd.

Polypropylene glycol, weight average molecular weight: about 4,000

. UNIOL P B500, manufactured by Nippon Oil Co., Ltd.

Polytetramethylene glycol, weight average molecular weight: about 500

. UNIOL P B700, manufactured by Nippon Oil Co., Ltd.

Polyoxybutylene polyoxypropylene glycol, weight average molecular weight: about 700

. UNIOL P B1000R, manufactured by Nippon Oil Co., Ltd.

Polytetramethylene glycol, weight average molecular weight: about 1000

[(e ₂ ) an ester of polyoxygenated C _2-6 alkanediol with at least one fatty acid] . WILBRIDE cp9, manufactured by Nippon Oil Co., Ltd.

a compound in which an OH group at both ends of polytetramethylene glycol is esterified with palmitic acid (C ₁₆ ), weight average molecular weight: about 1,150

[(e ₃ ) polyoxygenated C _2-6 alkanediol with at least one fatty acid ether] . UNILUBE MS-70K, manufactured by Nippon Oil Co., Ltd.

Stearic acid decyl ether of polypropylene glycol, about 15 repeating units, weight average molecular weight: about 1,140

[(e ₅ ) polyoxygenated C _2-6 alkanediol and chain hydrocarbon tetraol, chain hydrocarbon triol, or ether of chain hydrocarbon diol] . UNILUBE 5 T P-300 K B

Polyoxyethylene polyoxypropylene pentaerythritol ether formed by pentaerythritol 1 molar addition of ethylene oxide 5 moles and propylene oxide 65 moles, weight average molecular weight: 4,130

. UNIOL TG-3000, manufactured by Nippon Oil Co., Ltd.

Glyceryl ether of polypropylene glycol, about 16 repeating units, weight average molecular weight: about 3,000

. UNIOL TG-4000, manufactured by Nippon Oil Co., Ltd.

Glyceryl ether of polypropylene glycol, about 16 repeating units, weight average molecular weight: about 4,000

[(f ₁ )chain alkane] . PARLEAM6, manufactured by Nippon Oil Co., Ltd.

a branched chain hydrocarbon formed by copolymerizing a flowing isoparaffin, isobutylene and n-butene, followed by addition of hydrogen, a degree of polymerization: about 5 to about 10, and a weight average molecular weight of about 330

[other materials] . NA50, manufactured by Nippon Oil Co., Ltd.

Adding hydrogen to NA36, reducing the double bond ratio of glycerol and fatty acid from the unsaturated fatty acid of the raw material, weight average molecular weight: about 880

. (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 about 85:15, weight average molecular weight: about 220

. Monomuls 90-L2 lauric acid monoglyceride, manufactured by Cognis Japan Ltd. . Isopropyl citrate, manufactured by Tokyo Chemical Industry Co., Ltd.

Weight average molecular weight: about 230

. Diisostearyl malate

Weight average molecular weight: about 640

. UNIOL D-400, manufactured by Nippon Oil Co., Ltd.

Polypropylene glycol, weight average molecular weight: about 400

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

Polyethylene glycol, weight average molecular weight: about 1,500 ~ about 1,600

. NONION S-6, manufactured by Nippon Oil Co., Ltd.

Polyoxyethylene monostearate, about 7 repeat units, weight average molecular weight: about 880

. WILBRIDE s753, manufactured by Nippon Oil Co., Ltd.

Polyoxyethylene polyoxypropylene polyoxybutylene glycerol, weight average molecular weight: about 960

. UNIOL TG-330, manufactured by Nippon Oil Co., Ltd.

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

. UNIOL TG-1000, manufactured by Nippon Oil Co., Ltd.

Glyceryl ether of polypropylene glycol, about 16 repeating units, weight average molecular weight: about 1,000

. UNILUBE DGP-700, manufactured by Nippon Oil Co., Ltd.

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

. UNIOX HC60, manufactured by Nippon Oil Co., Ltd.

Polyoxyethylene hardened castor oil, weight average molecular weight: about 3,570

. Vaseline, manufactured by Cognis Japan Ltd.

Hydrocarbon, semi-solid from petroleum

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

Further, the water solubility is determined to be 100 g of desalted water according to the above method. 20.0 g was added thereto, and the sample dissolved after 24 hours was evaluated as "20 g <", and the sample dissolved in 100 g of desalted water and dissolved in 0.05 g but not dissolved in 1.00 g was evaluated to be 0.05 to 1.00 g.

Further, regarding the melting point, "<45" has a melting point of less than 45 °C.

The skin contact surface of the top sheet of the above sanitary napkin is coated with the above blood modifying agent. Each blood modifying agent and blood modifying agent are directly used at room temperature, and the blood modifying agent is heated to a melting point of +20 ° C when the room temperature is solid, and then, using a control seam HMA gun, each The blood modifying agent was micronized, and the entire skin contact surface of the top sheet was applied so as to have a basis weight of about 5 g/m ² .

Fig. 11 is an electron micrograph of the skin contact surface of the top sheet in the sanitary napkin (No. 2-5) containing the top C 3L oil fatty acid glyceride. As shown in Fig. 11, the tri-C2L oil fatty acid glyceride adhered to the surface of the fiber in the form of fine particles.

According to the above operation method, the rewet rate and the moving speed of the absorber are measured. The results are shown in Table 2 below.

[experiment method]

On the top sheet containing each blood modifying agent, an open acrylic plate (200 mm × 100 mm, 125 g, with a hole of 40 mm × 10 mm in the center) was placed, and the horse was EDTA blood (37 ± 1 ° C) from the above hole. In order to prevent coagulation, 3 g of ethylenediaminetetraacetic acid (hereinafter referred to as "EDTA") was added to the blood, and it was dropped by a pipette (first time), and after 1 minute, the horse EDTA of 27 ± 1 °C was used. Blood 3g from the hole of the acrylic plate, again with the pipette Drop (the second time).

Immediately after the dropping of the second blood, the acrylic plate was removed, and 10 pieces of filter paper (ADVANTEC Toyo Co., Ltd. qualitative filter paper No. 2, 50 mm × 35 mm) were placed in the place where the blood was dropped, and the pressure was 30 g/ Place the weight in the way of 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

Further, in addition to the evaluation of the rewet rate, the time during which the blood of the second time is dropped and the time when the blood moves from the top sheet to the absorber is measured, that is, the "absorbent moving speed". The moving speed of the absorbent body refers to the time until the top sheet is put into the blood until the red color of the blood is not visible on the surface of the top sheet and inside.

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

Next, the whiteness of the skin contact surface of the top sheet after the test of the moving speed of the absorbent body was visually evaluated by the following criteria.

◎: The red color of the blood hardly remains, and it is impossible to distinguish between the place where the blood exists and the place where it does not exist.

○: Although there are some residues in the red color of the blood, it is difficult to distinguish between the place where the blood exists and the place where it does not exist.

△: There are some residues in the red color of the blood, and the place where the blood exists is known.

×: The red color of the blood directly remains

The results are shown in Table 2 below.

>

In the case where there is no blood modifying agent, the re-infiltration rate is 22.7%, and the moving speed of the absorbent body exceeds 60 seconds. The glycerin and fatty acid triesters have a back-infiltration rate of 7.0% or less, and the absorbent body moves at a speed of 8 seconds. As described below, it is understood that the absorption performance is greatly improved. However, in the triester of glycerin and fatty acid, at the NA50 having a melting point exceeding 45 ° C, no significant improvement in the absorption performance was observed.

Similarly, it is understood that the absorption performance is greatly improved in a blood modifying agent having a water solubility of from about 0.00 to about 0.60 IOB, a melting point of about 45 ° C or less, and a water solubility of about 0.00 to about 0.05 g to 100 g of water at 25 ° C.

[Example 2]

Regarding the various blood types of animals, the rate of rewet is evaluated according to the above operation method. The blood that can be used in the experiment is as follows.

[Animal species]

(1 person

(2) Horse

(3) sheep

[blood species]

. Defibration: After taking blood, stirring with a glass bead in an Erlenmeyer flask for about 5 minutes

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

[Division]

Serum or plasma: each defibrinated blood or EDTA blood was centrifuged at room temperature for about 10 minutes at room temperature for 10 minutes.

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

An absorbent article was produced in the same manner as in Example 2 except that the amount of the three C2L oil fatty acid glycerides was about 5 g/m ² , and the rewet ratio was evaluated for each of the above blood. Each blood was measured three 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 2 was also obtained in the blood of humans and sheep. Also, the same tendency was observed in defibrinated blood and EDTA blood.

[Example 3] [Evaluation of blood retention]

The blood retention in the top sheet containing the blood modifying agent and the top sheet containing no blood modifying agent was evaluated.

[experiment method]

(1) In the skin contact surface of the top sheet formed by hot air non-woven fabric (composite fiber composed of polyester and polyethylene terephthalate, floor weight: 35 g/m ² ), three C2L oil fatty acid glyceride was used. The control joint HMA gun was micronized and applied in such a manner that the basis weight became about 5 g/m ² . Further, for comparison, those who do not apply the tri-C2L oil fatty acid glyceride are also prepared. Next, both the top sheet coated with the tri-C2L oil fatty acid glyceride and the uncoated top sheet were cut to a size of 0.2 g, and the mass (a) of the sterile cell filtration cap tube + top sheet was correctly determined.

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

(3) The sterile cell filtration cap tube was placed in a centrifuge tube, and subjected to low-speed centrifugation to remove excess horse EDTA blood.

(4) Determine the weight (b) of the top sheet containing the sterile cell filter cap + horse EDTA blood.

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

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

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

(7) Determination of sterile cell filter cap tube + horse EDTA The weight of the top sheet of blood (c).

(8) The amount of absorption (g) per 1 g of the top sheet after the test was calculated according to the following formula.

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 carried out three times, and the average value thereof was used.

The results are shown in Table 4 below.

It is suggested that the top sheet containing the blood modifying agent has low blood retention and can quickly move to the absorber after absorbing blood.

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

The viscosity of blood containing a blood modifying agent was measured using a Rheometric Expansion System ARES (Rheometric Scientific, Inc). Panathate 810s 2% by mass was added to the horse's fiber, and the sample was gently stirred to form a sample. The sample was placed in a parallel plate having a diameter of 50 mm, and the gap was 100 μm, and the viscosity was measured at 37 ± 0.5 °C. Because of the parallel plate, although the uniform shear rate was not applied to the sample, the average shear rate indicated by the machine was 10 s ^-1 .

The viscosity of the horse-defibrinated blood containing 2% by mass of Panasate 810s is 5.9 mPa. s, on the other hand, the viscosity of the horse hair fiber without blood modifying agent is 50.4mPa. s. Therefore, it was found that the horse-defibrinated blood containing 2% by mass of Panasate 810s had a viscosity of about 90% lower than that of the case without the blood modifying agent.

The blood is known to contain components such as blood cells and has a property of shaking, but it is considered that the blood modifying agent of the present invention lowers the viscosity of blood in a low viscosity domain. It is believed that by reducing the viscosity of the blood, the absorbed menstrual blood can be quickly moved from the top sheet to the absorber.

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

The menstrual blood of the healthy volunteers was collected on a wrap film (trademark), and a part thereof was added such that Panaseate 810s dispersed in 10 times by mass of phosphate buffered physiological saline was added at a concentration of Panaseate 810s of 1% by mass. The menstrual blood was dripped onto the slide glass, and the coverslip was covered, and the state of the red blood cells was observed with an optical microscope. The photomicrograph of the menstrual blood containing no blood modifying agent is shown in Fig. 12(a), and the photomicrograph of the menstrual blood containing Panasate 810s is shown in Fig. 12(b).

As shown in Fig. 12, in the menstrual blood containing no blood modifying agent, a collecting block in which red blood cells are continuously arranged or the like is formed, but in the menstrual blood containing Panasate 810s, the red blood cells are stably dispersed. Therefore, it is suggested that the blood modifying agent has a function of calming 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 drip method using a contact angle meter Drop Master 500 manufactured by Kyowa Interface Science Co., Ltd. The surface tension is applied to the sheep defibrinated blood, and a specific amount of the blood modifying agent is added and measured after shaking sufficiently.

The measurement was automatically performed by a machine, and the surface tension γ was obtained by the following equation (see FIG. 13 for reference).

γ=g×ρ×(de) ² ×1/H

g: gravity constant

1/H: correction term determined by ds/de

ρ: density

De: maximum diameter

Ds: the diameter of the position where only the de is raised by the drop end

The density ρ is measured according to the vibration density test method of "Density Test Method and Density ‧ Mass ‧ Capacity Conversion Table" of JIS K 2249-1995, and is used for the temperature measurement shown in Table 5 below.

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

The results are shown in Table 5.

As can be seen from Table 5, the blood modifying agent has a water solubility of about 0.00 to about 0.05 g per 100 g of water at 25 ° C, and the solubility in water is extremely low, but the surface tension of blood can be lowered.

It is considered that by lowering the surface tension of blood, the absorbed blood does not remain between the fibers of the top sheet, and can be quickly moved to the absorber.

Claims (11)

An absorbent article comprising a liquid permeable sheet, a liquid impervious sheet, and an absorbent article provided between the liquid permeable sheet and the liquid opaque sheet, characterized in that the liquid permeability The sheet has a liquid supply region for receiving the supply of the liquid, and a peripheral region located in the periphery of the liquid supply region, and the liquid is supplied to the field to form a stretchable region having an extensible snake abdomen, and surrounding the stretchable region. In the flexible field, a liquid permeation hole is formed in the stretchable region, and a liquid permeation hole is not formed in the flexible region, and the liquid supply region and the aforementioned are formed between the liquid supply region and the absorber. The absorber is formed of a first adhesive layer that is detachable, or an adhesive layer is not formed, and a second adhesive having a higher adhesive strength than the first adhesive layer is formed between the peripheral region and the absorber. Floor. The absorbent article according to claim 1, wherein in the field of supply of the liquid, a plurality of stretchable fields having an extensible snake abdomen are formed, and the flexible field surrounds each stretchable field. The absorbent article according to claim 2, wherein the flexible region is formed in a mesh shape, and the stretchable region is formed inside each mesh. The absorbent article according to claim 3, wherein the flexible region has a first linear region that is extended in a direction intersecting with the longitudinal direction of the absorbent article, and is arranged in parallel in a slightly parallel manner. The first field is extended in the intersecting direction, and is slightly parallel to the second field in a substantially linear shape. The absorbent article according to any one of claims 1 to 4, wherein the abdomen has an extension in a longitudinal direction of the absorbent article, and is arranged in parallel in a width direction of the absorbent article, and along the width direction. The section is a wavy mountain fold and a valley fold. The absorbent article according to any one of claims 1 to 4, wherein a compression groove is formed in a peripheral portion of the liquid supply region. The absorbent article according to any one of claims 1 to 4, wherein the liquid permeable sheet contains an IOB of 0.00 to 0.60, a melting point of 45 ° C or less, and a water of 0.00 to 0.05 g per 100 g of water at 25 ° C. Solubility of blood modifier. The absorbent article according to claim 7, wherein the blood modifying agent is composed of (i) to (iii): (i) hydrocarbon; (ii) having (ii-1) hydrocarbon portion, and (ii) -2) a compound of one or more of the same or different groups selected from the group consisting of a carbonyl group (-CO-) and an oxy group (-O-) interposed between the CC single bonds of the aforementioned hydrocarbon moiety; and (iii) a one selected from the group consisting of a carbonyl group (-CO-) and an oxy group (-O-) interposed between (iii-1) a hydrocarbon moiety and (iii-2) a CC single bond of the aforementioned hydrocarbon moiety a plurality of identical or different groups, one or a plurality of identical or different selected from the group consisting of (iii-3) a carboxyl group (-COOH) and a hydroxyl group (-OH) substituted for a hydrogen atom of the aforementioned hydrocarbon moiety Foundation In the group consisting of any combination of any of them, in the compound of (ii) or (iii), when two or more oxy groups are inserted, each oxy group is not adjacent. The absorbent article according to claim 7, wherein the blood modifying agent is (i') to (iii'): (i') hydrocarbon; (ii') has (ii'-1) hydrocarbon a part, with (ii'-2) a carbonyl bond (-CO-), an ester bond (-COO-), a carbonate bond (-OCOO-), and an ether interposed between the CC single bonds of the aforementioned hydrocarbon moiety One or a plurality of identical or different bonded compounds selected in the group of bonds (-O-); and (iii') having (iii'-1) a hydrocarbon moiety, and (iii'-2) a carbonyl bond (-CO-), an ester bond (-COO-), a carbonate bond (-OCOO-), and an ether bond (-O-) interposed between CC single bonds of the aforementioned hydrocarbon moiety One or a plurality of identical or different linkages selected, and one selected from the group consisting of (iii'-3) a carboxyl group (-COOH) and a hydroxyl group (-OH) substituted for a hydrogen atom of the aforementioned hydrocarbon moiety or a compound consisting of a plurality of compounds of the same or different bases; and any combination of the same, wherein, in the compound of (ii') or (iii'), two or more identical or different ones are inserted In the case of bonding, the bonds are not adjacent. The absorbent article according to claim 7, wherein the blood modifying agent is composed of the following (A) to (F): (A) (A1) having a chain hydrocarbon moiety and substituting the chain hydrocarbon moiety; a compound having 2 to 4 hydroxyl groups of a hydrogen atom and (A2) an ester having a chain hydrocarbon moiety and a compound which substitutes one carboxyl group of a hydrogen atom of the chain hydrocarbon moiety; (B) (B1) has a chain hydrocarbon moiety And an ether of a compound having 2 to 4 hydroxyl groups which replaces the hydrogen atom of the chain hydrocarbon moiety; and (B2) a compound having a chain hydrocarbon moiety and a hydroxyl group which replaces the hydrogen atom of the chain hydrocarbon moiety; (C1) a carboxylic acid having a chain hydrocarbon moiety and 2 to 4 carboxyl groups which replaces a hydrogen atom of the aforementioned chain hydrocarbon moiety, a hydroxy acid, an alkoxy acid or a side oxyacid, and (C2) having a chain hydrocarbon moiety, An ester of a compound having one hydroxyl group substituted for the hydrogen atom of the aforementioned chain hydrocarbon moiety; (D) an ether bond (-O-) having a chain hydrocarbon moiety and a CC single bond with the aforementioned chain hydrocarbon moiety, and a carbonyl group a compound selected from the group consisting of a bond (-CO-), an ester bond (-COO-), and a carbonate bond (-OCOO-); (E) a polyoxygenated C _2-6 alkane Glycol or its alkyl ester Are alkyl ethers; and (F) a hydrocarbon chain; and any combination of their being in the selected groups. The absorbent article according to claim 7, wherein the blood modifying agent is an ester of (a ₁ ) chain hydrocarbon tetraol and at least one fatty acid, (a ₂ ) chain hydrocarbon triol, and at least one Fatty acid ester, (a ₃ ) chain hydrocarbon diol and at least one fatty acid ester, (b ₁ ) chain hydrocarbon tetraol and at least one aliphatic monohydric alcohol ether, (b ₂ ) chain hydrocarbon An alcohol and at least one aliphatic monohydric alcohol ether, (b ₃ ) a chain hydrocarbon diol and at least one aliphatic monohydric alcohol ether, (c ₁ ) a chain hydrocarbon tetracarboxylic acid having four carboxyl groups, An ester of a hydroxy acid, an alkoxy acid or a oxo acid with at least one aliphatic monohydric alcohol, (c ₂ ) a chain hydrocarbon tricarboxylic acid having three carboxyl groups, a hydroxy acid, an alkoxy acid or a oxo acid An ester with at least one aliphatic monohydric alcohol, (c ₃ ) a chain hydrocarbon dicarboxylic acid having two carboxyl groups, a hydroxy acid, an alkoxy acid or an acid ester of at least one aliphatic monohydric alcohol (d ₁ ) an aliphatic monohydric alcohol and an aliphatic monohydric alcohol ether, (d ₂ ) dialkyl ketone, (d ₃ ) fatty acid and an aliphatic monohydric alcohol ester, (d ₄ ) dialkyl carbonate ester, (e ₁₎ polyoxy C _{2 ~ 6} alkanediols, (e ₂₎ polyoxy C _{2 ~ 6} alkylene glycol fatty acid with at least one of , An ether (e ₃₎ polyoxy C _{2 ~ 6} alkylene glycol and at least one of an aliphatic monohydric alcohol, (e ₄₎ polyoxy C _{2 ~ 6} alkylene glycol and a chain hydrocarbon tetracarboxylic acid, chain hydrocarbon An ester of a tricarboxylic acid or a chain hydrocarbon dicarboxylic acid, (e ₅ ) a polyoxy C _2-6 alkanediol and a chain hydrocarbon tetraol, a chain hydrocarbon triol, or an ether of a chain hydrocarbon diol, and (f ₁ ) a chain alkane, and any combination thereof, selected in the group.