TWI594739B - Absorbent article - Google Patents

Description

Absorbent article

The present invention relates to an absorbent article.

Absorbent articles, such as sanitary napkins, panty liners, etc., have been improved by the development of technology accumulated over the years. Compared with before, after leaking excretions such as menstrual blood, leakage has gradually decreased. It is more highly functional, for example, a study has a feeling of being similar to that of the close-fitting clothing, or a feeling of dryness of the top sheet even after absorbing excrement such as menstrual blood.

In particular, the menstrual blood during menstruation sometimes contains components such as the endometrium. Although the viscosity is high, after absorbing the high-viscosity menstrual blood, the top sheet is also non-sticky and has a good dry feeling. Moreover, the menstrual blood with high viscosity is mostly in the form of a block on the top sheet, and the user feels a sense of visual discomfort. From this point of view, it is better not to leave the menstrual blood with high viscosity on the top sheet. .

Absorbent articles coated with emulsion compositions are well known in the art.

For example, Patent Document 1 discloses an absorbent article which is a package The emulsion composition containing the polypropylene glycol material is disposed on the inner surface of the top sheet (the side on the garment side), the inner surface of the rear sheet (the side on the body side), the inner surface of the top sheet, and the inner surface of the rear sheet. Materials and so on.

Further, Patent Document 2 discloses an absorbent article in which an emulsion composition containing a polypropylene glycol material is applied to the outer surface of the top sheet (the side on the body side).

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Publication No. 2010-518918

[Patent Document 2] Japanese Patent Publication No. 2011-510801

However, the absorbent articles described in Patent Documents 1 and 2 do not mention which shape the top sheet should be formed in order to make the top sheet less likely to be sticky and have a dry feeling after absorbing menstrual blood.

Accordingly, it is an object of the present invention to provide an absorbent article in which the exudation port contact area of the top sheet is less likely to stick after absorption of menstrual blood and has a dry feeling.

The inventors of the present invention have conducted intensive studies to solve the above problems, and have found an absorbent article having a liquid permeable top sheet, a liquid impermeable back sheet, and the top sheet and the back sheet. The absorbent article of the absorbent body, characterized in that the liquid permeable top sheet has a plurality of protruding portions in the discharge port contact region, and the protruding portion has an angle of 36 to 80° with respect to a plane direction of the absorbent article. And the liquid permeable top sheet has a region containing a blood slip imparting agent in at least the protruding portion of the excretory opening contact region, and the region containing the blood slip imparting agent comprises 0.01 to 80 mm at 40 ° C. ² / s dynamic viscosity, 0.01 to 4.0% by mass of water holding capacity, less than 1,000 weight average molecular weight of the blood slip property imparting agent.

The excretory opening contact area of the top sheet of the absorbent article of the present invention is not easily adhered after absorption of menstrual blood, and has a dry feeling.

1‧‧‧Absorbables

2‧‧‧Top sheet

3‧‧‧ absorber

4‧‧‧Flanking

5‧‧‧Side sheet

6‧‧‧ Imprint

7‧‧‧A zone containing a blood slip agent

8‧‧‧ rear sheet

9‧‧‧ 突部

11‧‧‧ convex

12‧‧‧ recess

13‧‧‧Contact skin surface

14‧‧‧ Blood slip agent

15, 15', 15" ‧ ‧ menstrual blood

Fig. 1 is a front elevational view showing an absorbent article according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view of the absorbent article 1 shown in Fig. 1.

Fig. 3 is a cross-sectional view taken along the line XX of the region 7 containing the blood slidability imparting agent of the absorbent article 1 shown in Fig. 1 for absorbing the menstrual blood caused by the blood slidability-imparting agent. A diagram illustrating the mode of movement of the body.

[Fig. 4] Fig. 4 is a top sheet containing three C2L oil fatty acid glycerides In the sanitary napkin, the top sheet is in contact with the electron micrograph of the skin surface.

Fig. 5 is a photomicrograph of a menstrual blood with or without a blood slip imparting agent.

Fig. 6 is a view for explaining a method of measuring surface tension.

[definition]

Define some of the terms used in this manual.

. "angle of the bulge"

In the present specification, the "angle of the protrusion" (hereinafter also referred to as "angle θ", "θ", etc.) means a line passing through the top of the protrusion and the bottom of the protrusion, and the absorbent article. The angle formed by the plane in the plane direction.

The specific measurement method will be described later.

. "Drainage contact area"

In the present specification, the "excretion port contact area" of the top sheet means an area in the top sheet which is in contact with the user's excretory opening (small labia, etc.). The above-mentioned excretory opening contact area may have a different position depending on the size of the absorbent article, and when it has a flanked absorbent article, it is generally arranged continuously or discontinuously to surround the center of the width direction of the absorbent article. The inner side of the region defined by the embossing of the longitudinal line and the intersection of the broad direction lines passing through the longitudinal centers of the two wing portions is the drain port contact area. And not In the case of a flanked absorbent article, in general, the embossing is defined as a venting contact area by a continuous or discontinuous configuration that surrounds the central portion of the absorbent article in the width direction and the longitudinal center portion.

. "Front"

In the present specification, "forward" means that the user is used as the reference on the basis of the user.

. "A zone containing a blood slip agent"

In the present specification, the "region containing the blood slip imparting agent" in the top sheet means that the top sheet contains the region of the blood slip imparting agent in the excretory opening contact region. The top sheet may have a region containing the blood slip imparting agent in a portion of the excretory opening contact region, and the entire expulsion port contact region may have a region containing the blood slip imparting agent. Further, the top sheet may have a region containing the blood slip imparting agent in the non-contact region of the excretion port exceeding the excretion port contact region.

The absorbent article of the present invention will be described in detail below.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a front elevational view of an absorbent article according to an embodiment of the present invention, and more particularly, a front view of a sanitary napkin. Fig. 1 is a view of the top sheet 2 as it contacts the skin surface. The absorbent article 1 shown in Fig. 1 has a liquid permeable top sheet 2, a liquid impermeable back sheet (not shown), and an absorbent body 3 between the top sheet 2 and the back sheet. In the absorbent article 1 shown in Fig. 1, in the longitudinal direction of the absorbent article 1 The both side portions are provided with clothes for fixing the absorbent article 1 to the user, for example, one pair of the side flaps 4 on the underwear.

Further, the absorbent article 1 shown in Fig. 1 is forward toward the left side.

Further, in the absorbent article 1 shown in Fig. 1, the excretory opening contact area is an area partitioned by the four imprints 6' in the area 7 containing the blood slip imparting agent, and the excretory opening of the top sheet 2 is in contact. The regions all have a region 7 containing a blood slip imparting agent.

Further, the absorbent article 1 shown in Fig. 1 has a side sheet 5 and a plurality of embossments 6, but the absorbent article according to another embodiment of the present invention does not have side sheets and/or embossing.

In the absorbent article shown in Fig. 1, the top sheet 2 is formed of a nonwoven fabric, but in the absorbent article according to another embodiment of the present invention, the top sheet is formed of a woven fabric or a film of a hole.

In the absorbent article 1 shown in Fig. 1, the top sheet 2 has a plurality of projections (not shown) in the discharge port contact area. In the absorbent article 1 shown in Fig. 1, the top sheet 2 has at least the above-mentioned projecting portion of the excretory opening contact region, and has a region 7 containing a blood slip imparting agent, and the region 7 containing the blood slip imparting agent contains It is a dynamic viscosity of 0.01 to 80 mm ² /s at 40 ° C, a water holding ratio of 0.01 to 4.0% by mass, and a blood slip property imparting agent having a weight average molecular weight of less than 1,000.

Fig. 2 is a cross-sectional view of the absorbent article 1 shown in Fig. 1, which corresponds to the X-X cross section of Fig. 1. The absorbent article 1 shown in Fig. 2 has a liquid permeable top sheet 2, a liquid impermeable back sheet 8, The absorber 3 between the top sheet 2 and the back sheet 8.

In the absorbent article 1 shown in Fig. 2, the top sheet 2 has a plurality of projections 9 in the discharge port contact area, and the projections 9 have an angle θ with respect to the plane S _{1 of the} absorbent article 1 in the plane direction. .

The method of measuring the angle θ of the protruding portion will be described with reference to Fig. 2 .

The angle θ of the protruding portion means a straight line passing through the top of the protruding portion 9 ', with the bottom of the protruding portion 9 "of _1, and the planar direction of the absorbent article 1 to the surface S of L ₁ angle θ angle The measurement method is as follows.

The height H of the projection 9 is obtained from the difference between the height of the top portion 9' of the projection 9 and the height of the bottom portion 9" of the projection 9.

Next, the distance between the top 9' of the projecting portion 9 and the bottom portion 9' of the projecting portion 9 in the plane direction is obtained, and the 1/2 width W of the projecting portion 9 is obtained.

The angle θ(°) is calculated according to the following equation: θ (°) = (360/2π) × tan ^-1 (H/W)

Further, as the angle θ, at least a data average of 50 points is employed.

The height H and the width W can be determined by a method known in the art, for example, by a laser displacement gauge, for example, a high-precision 2-dimensional laser displacement gauge LJ-G series manufactured by Keyence Corporation (type :LJ-G030), etc. to measure.

Further, for the height H and the width W, for example, the sample to be measured may be immersed in liquid nitrogen for 30 seconds, and the sample immersed in liquid nitrogen may be divided into two, and the cross section thereof may be calculated by electron microscopy and phase formation.

In the absorbent article of the present invention, the projections have an angle of from about 36 to about 80, preferably from about 37 to about 70, and more preferably from about 38 to about 60. If the angle is less than about 36°, the protrusion is more difficult to have a high sliding energy to the menstrual blood. Further, when the angle exceeds about 80°, the strength of the protruding portion tends to be weak, and when used, the protruding portion is crushed by the body pressure.

In the absorbent article of the present invention, the top sheet preferably has a top portion of the projections of from about 0.2 to about 15.0 mm, more preferably from about 0.5 to about 5.0 mm, and most preferably from about 0.5 to about 2.0 mm. The thickness. Since the protrusion has the above-described angle θ, even if the top sheet is thick, a small amount of menstrual blood can slide down to the inside thereof.

Further, if the thickness exceeds about 15.0 mm, there is a tendency to feel bad.

In an absorbent article according to an embodiment of the present invention, the plurality of protruding portions are a plurality of ridge portions, and a groove portion is formed between the two ridge portions, that is, an absorbent article according to an embodiment of the present invention. The top sheet has a plurality of ridges and a plurality of grooves at the discharge port contact area.

In the absorbent article of the present invention, the height of the protruding portion is preferably about 0.1 mm or more and less than about 15.0 mm, more preferably about 0.4 mm or more and less than about 5.0 mm, and most preferably about 0.4 mm or more and less than about 2.0mm. If the height is less than about 0.1 mm, it is difficult to form the above angle.

As an example of the top sheet having the protruding portion, for example, the liquid permeable top sheet has a ridge groove structure including a plurality of ridges and a plurality of grooves at the skin contact surface, and for example, Japanese special fair 7- No. 84,697, Japanese Patent Laid-Open No. Hei 2-229255, Japanese Patent Laid-Open No. 2001-328191, Japanese Patent Laid-Open No. 2008-002034, and No. 2008-023311, the same as No. 2008-025078 No. 2008-025085, the same Non-woven fabrics such as No. 2008-307179, the same as No. 2009-030218, the same as No. 2010-285735, the same as No. 2011-038211, the same as No. 2011-074515, the same as No. 2011-080178, and the Japanese special opening 64 -34365, a hole film described in Japanese Patent Publication No. 57-17081.

In the embodiment in which the top sheet has a ridge portion and a groove portion, the height of the ridge portion is preferably about 0.1 mm or more and less than about 15.0 mm, more preferably about 0.4 mm or more and less than about 5.0 mm, and most preferably about 0.4 mm or more. Less than about 2.0 mm. It is to slide the menstrual blood from the ridge to the groove, and then move quickly to the absorber.

In the absorbent article according to an embodiment of the present invention, the liquid permeable top sheet has at least an embossing formed by pressing the liquid permeable top sheet. For example, the liquid permeable topsheet has an embossing formed by the wicking topsheet and the absorbent body. Further, an absorbent article according to another embodiment of the present invention includes a second sheet, and the liquid permeable top sheet has a embossing formed by pressing a liquid permeable top sheet, a second sheet, and an absorbent body. Since the top sheet has the above embossing, a protrusion can be formed at the top sheet.

In the absorbent article of the present invention, the top sheet contains the blood slip imparting agent in the region containing the blood slip imparting agent, preferably in the range of from about 1 to about 30 g/m ² , more preferably from about 2 to about 20 g. /m ^{2 is} preferably a basis weight of from about 3 to about 10 g/m ² . Although the effect of the blood-slip imparting agent is described later, if the basis weight is less than about 1 g/m ² , the menstrual blood reaching the excretory contact region of the top sheet cannot be rapidly moved to the absorbent body, and remains in the original place. However, if the basis weight exceeds about 30 g/m ² , the wet sticky feeling in use tends to increase.

In the present specification, the basis weight of the blood slip property imparting agent contained in the top sheet is measured as follows.

(1) The range of the top sheet to be measured is obtained by using a sharp blade, for example, a replaceable blade of the blade, to cut out without changing its thickness.

(2) Area of sample: Determination of SA (m ² ) and mass: SM ₀ (g).

(3) The sample is dissolved in a solvent in a solvent soluble in a blood slip imparting agent, for example, an alcohol, acetone, or the like, at least for 3 minutes.

(4) The sample is filtered on the filter paper of the measurement quality, and the sample is thoroughly washed with the solvent on the filter paper. The sample on the filter paper was dried in an oven at 60 °C.

(5) Measure the quality of the filter paper and the sample, and then calculate the mass of the dried sample by subtracting the mass of the filter paper: SM ₁ (g).

(6) The basis weight BS (g/m ² ) of the blood slip imparting agent is calculated by the following formula: BS (g/m ² ) = [SM ₀ (g) - SM ₁ (g)] / SA (m ² ) Moreover, in order to reduce the error, a plurality of samples are taken from a plurality of absorbent articles, and the total area of the samples exceeds 100 cm ² , and a plurality of experiments are repeated, and the average value is used.

[blood slippery agent]

In the absorbent article of the present invention, the liquid permeable top sheet has a region containing the blood slip imparting agent at least in the protruding portion, and the region containing the blood slip imparting agent is contained in the region of about 0.01 at 40 ° C. A viscous viscosity of about 80 mm ² /s, a water holding ratio of about 0.05 to about 4.0% by mass, and a blood slip property imparting agent having a weight average molecular weight of less than about 1,000.

The blood slip imparting agent has a dynamic viscosity of from about 0 to about 80 mm ² /s at 40 ° C, preferably a dynamic viscosity of from about 1 to about 70 mm ² /s, more preferably from about 3 to about 60 mm ^{2 .} The dynamic viscosity of /s is preferably a dynamic viscosity of from about 5 to about 50 mm ² /s, and is preferably a dynamic viscosity of from about 7 to about 45 mm ² /s.

The above dynamic viscosity is a) the greater the molecular weight of the blood slip imparting agent, b) the polar group, for example, a carbonyl bond (-CO-), an ether bond (-O-), a carboxyl group (-COOH), a hydroxyl group. The higher the ratio of (-OH) and the like, and the greater the c) IOB, the tendency to become higher.

Further, in order to have a dynamic viscosity of from about 0 to about 80 mm ² /s at 40 ° C, the melting point of the blood slip imparting agent is preferably 45 ° C or less. This is because if the blood slip imparting agent contains crystals at 40 ° C, the dynamic viscosity tends to be high.

Further, in the present specification, the dynamic viscosity at 40 ° C is simply referred to as "dynamic viscosity".

Although the meaning of the dynamic viscosity in the blood slip imparting agent is as follows, if the dynamic viscosity exceeds about 80 mm ² /s, the viscosity of the blood slip imparting agent becomes high, and the blood slip imparting agent reaches and reaches the top. The tendency of the thin film to contact the skin surface is difficult to slip into the interior of the absorbent article.

The above dynamic viscosity is measured according to "5. Dynamic viscosity test method" of JIS K 2283:2000, using a Cannon-Fenslce counter-flow viscosity meter at a test temperature of 40 °C.

The blood slip imparting agent has a water holding ratio of about 0.01 to about 4.0% by mass, preferably a water holding ratio of about 0.02 to about 3.5% by mass, more preferably a water holding ratio of about 0.03 to about 3.0% by mass. Preferably, it has a water holding ratio of from about 0.04 to about 2.5% by mass, and most preferably has a water holding ratio of from about 0.05 to about 2.0% by mass.

In the present specification, the "water holding ratio" means the ratio (mass) of water that the substance can hold, and is measured as described below.

(1) In a thermostatic chamber at 40 ° C, 20 mL of test tube, rubber stopper, substance to be measured, and deionized water were allowed to stand overnight.

(2) In the above-mentioned constant temperature chamber, 5.0 g of the substance to be measured and 5.0 g of deionized water were placed in the test tube.

(3) In the above-mentioned constant temperature chamber, the test nozzle is fastened with a rubber bolt, and the test tube is rotated once and allowed to stand for 5 minutes.

(4) In the above-mentioned thermostatic chamber, a layer of a substance to be measured (usually, an upper layer) of 3.0 g to a mass of 90 mm in diameter: W ₀ (g) in a glass culture dish is used.

(5) The above culture dish was heated in an oven at 105 ° C for 3 hours to evaporate water, and the mass per dish was measured: W ₁ (g).

(6) The water holding ratio is calculated according to the following formula.

Water holding capacity (% by mass) = 100 × [W ₀ (g) - W ₁ (g)] / 3.0 (g)

The measurement was carried out 3 times, and the average value was used.

The significance of the water absorbing rate in the blood slidability imparting agent will be described later. However, if the water absorbing ratio is lowered, the affinity of the blood slidability imparting agent and menstrual blood is lowered, and there is a menstrual blood that reaches the top sheet and contacts the skin surface. The tendency to slip down into the interior of an absorbent article.

On the other hand, if the water holding ratio is high, the affinity between the surfactant and the menstrual blood will be extremely high, and the absorbed menstrual blood will remain on the skin contacting the top sheet, and the top sheet will contact the skin surface. There is a tendency to be easily colored in red.

The above water holding rate will be smaller with a) the molecular weight of the blood slip imparting agent, and b) a polar group, for example, a carbonyl bond (-CO-), an ether bond (-O-), or a carboxyl group (-COOH). The higher the ratio of hydroxyl groups (-OH), the greater the tendency of the water retention rate. This is because the blood slip imparting agent is more hydrophilic. Further, the water absorbing rate tends to increase as the IOB described later increases, that is, as the inorganic value increases and the organic value decreases, the value of the water absorbing ratio tends to increase. This is because the blood slip imparting agent is more hydrophilic.

The meaning of the dynamic viscosity and the water holding ratio in the blood slip imparting agent will be described.

Figure 3 is a blood-sliding equivalent of the absorbent article 1 shown in Figure 1. The cross-sectional view of the X-X cross section of the region 7 of the sex-imparting agent is used to explain the migration pattern of the menstrual blood to the absorbent body due to the blood slip imparting agent. The absorbent article 1 shown in Fig. 3 has an absorption between a liquid permeable top sheet 2, a liquid impermeable back sheet 8, a liquid permeable top sheet 2, and a liquid impermeable back sheet 8. Body 3.

In Fig. 3, the top sheet 2 is formed of a non-woven fabric, and has a plurality of convex portions 11 and a plurality of concave portions 12 on the contact skin surface 13, and a blood-slip imparting agent 14 is applied to the contact skin surface 13 of the top sheet 2. . Further, in FIG. 3, although the blood slip property imparting agent 14 is displayed as a liquid droplet (or particle) on the contact skin surface 13 of the top sheet 2, the blood slip property is imparted to the absorbent article of the present invention. The shape and distribution of the agent are not limited to those shown in the drawings.

As shown in FIG. 3, the menstrual blood 15 reaching the convex portion 11 of the top sheet 2 comes into contact with the blood slip property imparting agent 14 present in the convex portion 11. A part of the blood slip imparting agent 14 present in the convex portion 11 is slid down to the concave portion 12 (menstrual blood 15') together with the menstrual blood 15. Then, the menstrual blood 15' slides down into the inside of the concave portion 12 and reaches the absorbent body 3 (menstrual blood 15"). Then, the menstrual blood 15" is absorbed by the absorbent body 3.

More specifically, the blood slip property imparting agent 14 having a water holding ratio of about 0.01 to about 4.0% by mass has a certain affinity with the menstrual blood 15. For example, the hydrophilic portion of the blood slip property imparting agent 14 (for example, a hydrophilic group such as a polar group such as a carbonyl group, an oxy group, a carboxyl group, a hydroxyl group or the like, and a hydrophilic bond, for example, having a polarity Bonding, for example, carbonyl bonding, ester bonding, carbonate bonding, ether bonding, etc.) The hydrophilic component (plasma, etc.) in the menstrual blood 15 has high affinity, and while the affinity component is pulled, the hydrophobic portion (for example, the hydrocarbon portion) of the blood slip imparting agent 14 and the hydrophilic component in the menstrual blood 15 ( The affinity of plasma or the like is low, and the hydrophilic component is repelled, which acts as a so-called slip agent, and causes the menstrual blood 15 to slide toward the absorber 3.

Further, the blood slip property imparting agent 14 having a dynamic viscosity of about 0.01 to about 80 mm ² /s at 40 ° C is a very low viscosity at the time of the user's body temperature, and a part thereof is related to menstrual blood 15 The slider 11 is slid down to the recess 12, and then slides down through the recess 12 to the inside of the absorbent article 1.

In addition, since the blood slip property imparting agent 14 has a water absorbing ratio of about 0.01 to about 4.0% by mass and has a low affinity with the main hydrophilic component (plasma or the like) in the menstrual blood 15, it is difficult for the menstrual blood 15 to remain in the top sheet 2 on. This is because the hydrophilic component (plasma, etc.) in the menstrual blood 15 repels the hydrophobic portion of the blood slip imparting agent 14.

In Fig. 3, the higher the height of the convex portion 11 of the top sheet 2, that is, the steeper the inclination of the convex portion 11, the faster the sliding speed of the menstrual blood 15 reaching the convex portion 11 is, and the migration to the inside of the absorbent article 1 is made. It's easy. In particular, when the menstrual blood 15 is a small amount, the self-weight is light, and there is a tendency that it is difficult to slide off the convex portion 11. However, when the inclination of the convex portion 11 is steep, the convex portion 11 rapidly slides a small amount of menstrual blood 15 to Concave portion 12.

In addition, in FIG. 3, although the migration of the menstrual blood to the absorber by the blood-slipness-imparting agent is demonstrated, it is set as the thing which contains the composition of a blood-sliding agent.

The above blood slip imparting agent has a weight average molecular weight of less than about 1,000, and preferably a weight average molecular weight of less than about 900. When the weight average molecular weight is about 1,000 or more, viscosity is generated in the blood slip imparting agent, which tends to give the user an unpleasant feeling. Further, when the weight average molecular weight is increased, the viscosity of the blood slip imparting agent tends to be high, so that the viscosity of the blood slip imparting agent is hard to be reduced to a viscosity suitable for coating by heating. That is, a state in which the blood slip imparting agent has to be diluted with a solvent has occurred.

The above blood slip imparting agent preferably has a weight average molecular weight of about 100 or more, and more preferably has a weight average molecular weight of about 200 or more. When the weight average molecular weight is smaller, the vapor pressure of the blood slip imparting agent is increased, and vaporization, amount reduction, and odor during use are caused during storage.

Further, in the present specification, the "weight average molecular weight" includes a compound obtained by a polydisperse system (for example, a compound produced by sequential polymerization, an ester derived from a plurality of fatty acids, and a plurality of aliphatic monovalent alcohols), and a single The concept of a compound (for example, an ester formed from one fatty acid and one aliphatic monovalent alcohol) means a molecule having a molecular weight M _i of N _i (i=1, or i=1, 2· In the series composed of ··), M _w : M _w = Σ N _i M _i ² / Σ N _i M _i obtained by the following equation.

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

The measurement conditions of GPC are as follows, for example.

Model: (share) High-speed liquid chromatogram by Hitachi High-Technologies Corporation Lachrom Elite

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

Dissolution: THF

Flow rate: 1.0mL/min

The amount entered: 100μL

Detection: RI (differential refractometer)

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

The above blood slip imparting agent preferably has an IOB of from about 0.00 to about 0.60.

IOB (Inorganic Organic Balance) is an index indicating the balance between hydrophilicity and lipophilicity, and the present specification means a value calculated by the following formula proposed by Oda et al.: IOB = inorganic value / organic value.

The inorganic value and the organic value are organic concept maps described in the field of "The prediction of organic compounds and the organic concept map" by Fujita Mu, Vol. 11, No. 10 (1957) p. 719-725).

According to Fujita's proposal, the organic and inorganic values of the main base are summarized in Table 1 below.

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

In the above blood slip imparting agent, IOB is preferably from about 0.00 to about 0.60, more preferably from about 0.00 to about 0.50, most preferably from about 0.00 to about 0.40, and most preferably from about 0.00 to about 0.30. This is because when the IOB is in the above range, the above-mentioned holding power and dynamic viscosity are easier to satisfy the above requirements.

The blood slip imparting agent preferably has a melting point of 45 ° C or less, more preferably 40 ° C or less. The reason why the blood slip property imparting agent has a melting point of 45 ° C or less is that the above-mentioned blood slip property imparting agent is more likely to have a dynamic viscosity in the above range.

In the present specification, the term "melting point" means the peak peak temperature of the endothermic peak when the solid state changes to a liquid state when measured at a temperature rising rate of 10 ° C /min in a differential scanning calorimetry analyzer. As the above difference For example, a DSC-60 DSC measuring device manufactured by Shimadzu Corporation can be used as the scanning calorimetry analyzer.

When the blood slip imparting agent has a melting point of about 45 ° C or lower, it may be liquid at room temperature (about 25 ° C) or may be solid, that is, the melting point may be about 25 ° C or more, or may be less than It is about 25 ° C and has, for example, a melting point of about -5 ° C, about -20 ° C, and the like.

The blood slip property imparting agent does not have a lower limit in the melting point, but the vapor pressure is preferably low. The vapor pressure imparting agent has a vapor pressure of preferably from 0 to 200 Pa at 25 ° C (1 atm), more preferably from about 0 to about 100 Pa, most preferably from about 0 to about 10 Pa, and most preferably from about 0 to about 0 It is about 1 Pa, and it is preferably about 0.0 to about 0.1 Pa.

The absorbent article of the present invention is preferably used in contact with a human body, and 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, most preferably from about 0 to about 10 Pa. It is preferably from about 0 to about 1 Pa, and is preferably from about 0.0 to about 0.1 Pa. This is because if the vapor pressure of the blood slip imparting agent is increased, problems such as vaporization, a decrease in amount, and an odor during use are caused during storage.

Further, the melting point of the blood slip imparting agent can be selected in accordance with the weather, the length of time of use, and the like. For example, in an area where the average temperature is below about 10 ° C, a blood slip property imparting agent having a melting point of about 10 ° C or less is used, and after the blood is excreted, even if it is sometimes cooled by the ambient temperature, the blood slip property imparting agent Still organic.

Further, when the absorbent article is used for a long period of time, the melting point of the blood slip imparting agent is preferably higher in the range of about 45 ° C or lower. because In order to be less susceptible to sweating, friction during use, etc., when used for a long time, the blood slip imparting agent does not deviate.

In this technical field, the surface tension of menstrual blood is changed, and the menstrual blood is rapidly absorbed. The skin contact surface of the top sheet is also coated with a surfactant. However, the affinity between the top sheet coated with the surfactant and the hydrophilic component (plasma, etc.) in the menstrual blood becomes high, and the components are pulled, and the menstrual blood tends to remain on the top sheet. Unlike the conventionally known surfactant, the blood slip property-imparting agent has low affinity with menstrual blood, does not leave menstrual blood on the top sheet, and rapidly migrates to the absorber.

The blood slip property imparting agent is preferably a group consisting of (i) to (iii) and any combination of the following, (i) a hydrocarbon, (ii) having a (ii-1) hydrocarbon moiety, and ( Ii-2) one or more of the same or different compounds inserted between the CC single bonds of the above hydrocarbon moiety selected from the group consisting of a carbonyl group (-CO-) and an oxy group (-O-), and ( Iii) having a carbonyl group (-CO-) and an oxy group (-O-) having (iii-1) a hydrocarbon moiety, (iii-2) one or a plurality of identical or different CC single bonds inserted into the above hydrocarbon moiety. a group consisting of a group consisting of a carboxyl group (-COOH) and a hydroxyl group (-OH), which is the same or different from (iii-3) one or a plurality of hydrogen atoms replacing the hydrocarbon moiety. Compound.

In the present specification, "hydrocarbon" means a compound formed by a carbon atom and a hydrogen atom, a chain hydrocarbon such as a hydrocarbon hydrocarbon (excluding double bonds and three a bond, also known as an alkane), an olefinic hydrocarbon (containing a double bond, also known as a normal olefin), an acetylene hydrocarbon (containing a triple bond, also known as an alkyne), and comprising two or more selected from the group consisting of a double bond and a triple bond. Examples of the hydrocarbons to be bonded and the cyclic hydrocarbons include aromatic hydrocarbons and alicyclic hydrocarbons.

The hydrocarbon is preferably a chain hydrocarbon or an alicyclic hydrocarbon, more preferably a chain hydrocarbon, and most preferably a hydrocarbon hydrocarbon, an olefin hydrocarbon, and a hydrocarbon containing two or more double bonds (excluding a triple bond) And it is excellent as a hydrocarbon hydrocarbon.

The chain hydrocarbons include linear hydrocarbons and branched hydrocarbons.

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

Further, in the compound of the above (iii), a compound in which at least one hydrogen atom of the hydrocarbon moiety is substituted with a carboxyl group (-COOH), and a compound in which at least one hydrogen atom of the hydrocarbon moiety is substituted with a hydroxyl group (-OH) is preferred. . Since the carboxyl group is bonded to a metal such as menstrual blood, the water slidability of the blood slip imparting agent becomes high, and sometimes it exceeds a specific range. This point is the same as the IOB. 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 value of the IOB may be more than about when the blood slip imparting agent having a carboxyl group is used. 0.60.

The above-mentioned blood slip property imparting agent is more preferably a group consisting of (i') to (iii') and any combination of the above, (i') hydrocarbon, (ii') a carbonyl bond (-CO-) selected from the CC single bond having the (ii'-1) hydrocarbon moiety, the same or different from (ii'-2) one or more of the above hydrocarbon moiety. a compound of a group consisting of an ester bond (-COO-), a carbonate bond (-OCOO-), and an ether bond (-O-), and (iii') having (iii'-1 a hydrocarbon moiety, which is the same as or different from (iii'-2) one or more of the CC single bonds inserted into the hydrocarbon moiety selected from the group consisting of a carbonyl bond (-CO-), an ester bond (-COO-), a bond of a group consisting of a carbonate bond (-OCOO-) and an ether bond (-O-), and a hydrogen atom replacing the above hydrocarbon moiety with the same or different from (iii'-3) one or plural A compound selected from the group consisting of a carboxyl group (-COOH) and a hydroxyl group (-OH).

In the above compounds (ii') and (iii'), when two or more identical or different linkages are inserted, that is, two or more identical or different ones are selected from a carbonyl bond (-CO-), When an ester bond (-COO-), a carbonate bond (-OCOO-), and an ether bond (-O-) are bonded, each bond is not adjacent, and at least one bond is interposed between each bond. carbon atom.

The above-mentioned blood slip imparting agent is preferably such that, in the hydrocarbon portion, there are about 1.8 or less carbonyl bonds (-CO-) and two or less ester bonds (-COO-) per 10 carbon atoms. , about 1.5 or less carbonate linkages (-OCOO-), about 6 or less ether linkages (-O-), about 0.8 or less carboxyl groups (-COOH), and/or about 1.2 or less hydroxyl groups (-OH).

The above-mentioned blood slip property imparting agent is preferably selected from the group consisting of (A) to (F) and any combination of the above, (A) (A1) and (A2), wherein (A1) is a compound having a chain hydrocarbon moiety and 2 to 4 hydroxyl groups which replace a hydrogen atom of the above-mentioned chain hydrocarbon moiety, and (A2) is a carboxyl group having a chain hydrocarbon moiety and a hydrogen atom replacing the chain hydrocarbon moiety. a compound, (B) (B1) and (B2), wherein (B1) is a compound having a chain hydrocarbon moiety and 2 to 4 hydroxyl groups which replace a hydrogen atom of the above chain hydrocarbon moiety, and (B2) has a chain hydrocarbon moiety, a compound substituted with one hydroxyl group of a hydrogen atom of the above chain hydrocarbon moiety, and an ester of (C) (C1) and (C2), wherein (C1) is a chain hydrocarbon moiety and a substituted chain a carboxylic acid, a hydroxy acid, an alkoxy acid or an oxo acid of 2 to 4 carboxyl groups of a hydrogen atom of a hydrocarbon portion, (C2) being one having a chain hydrocarbon moiety and a hydrogen atom replacing the above chain hydrocarbon moiety a compound of a hydroxyl group, (D) having a chain hydrocarbon moiety, and an ether bond (-O-), a carbonyl bond (-CO-), an ester bond (between a CC single bond inserted into the above-mentioned chain hydrocarbon moiety) -COO-), and carbonate linkage (-OCOO-) Any of a group composed of the bonding compound, (E) polyoxy C ₃ ~ C ₆ alkylene glycol, or of an alkyl ester or alkyl ether, and (F) a chain hydrocarbon.

Hereinafter, the blood slip property imparting agent according to (A) to (F) will be described in detail.

[(A) (A1) and (A2) esters, wherein (A1) is a chain hydrocarbon a compound partially substituted with 2 to 4 hydroxyl groups of a hydrogen atom of the above-mentioned chain hydrocarbon moiety, and (A2) is a compound having a chain hydrocarbon moiety and a carboxyl group substituted for a hydrogen atom of the above chain hydrocarbon moiety]

(A) an ester of (A1) and (A2), wherein (A1) is a compound having a chain hydrocarbon moiety and 2 to 4 hydroxyl groups which replace a hydrogen atom of the above-mentioned chain hydrocarbon moiety, and (A2) has a chain shape. The hydrocarbon moiety and the compound which replaces one carboxyl group of the hydrogen atom of the above-mentioned chain hydrocarbon moiety (hereinafter also referred to as "compound (A)") have all of the hydroxyl groups as long as they have the above-mentioned dynamic viscosity, water retention ratio and weight average molecular weight. It can also be esterified.

(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 quaternary An alcohol, for example, an alkane tetraol, for example, pentaerythritol, a chain hydrocarbon triol, for example, an alkane triol, for example, glycerin, and a chain hydrocarbon diol, for example, an alkane diol, for example, a diol .

The compound having a chain hydrocarbon moiety (A2) and a carboxyl group replacing the hydrogen atom of the chain hydrocarbon moiety, for example, one hydrogen atom on the hydrocarbon is substituted by one carboxyl group (-COOH). Compounds, for example, fatty acids.

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

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

As the ester of the above chain hydrocarbon tetraol and at least one fatty acid, for example, 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):

a diester of pentaerythritol and a fatty acid, the following formula (4):

a monoester of pentaerythritol and a fatty acid.

(wherein R ¹ to R ⁴ are each a chain hydrocarbon).

As the fatty acid (R ¹ COOH, R ² COOH, R ³ COOH, and R ⁴ COOH) constituting the ester of the pentaerythritol and the fatty acid, the ester of the pentaerythritol and the fatty acid satisfies the above-mentioned dynamic viscosity, water retention ratio, and weight average molecular weight. There is no particular limitation, for example, a saturated fatty acid, for example, a C ₂ - C ₃₀ saturated fatty acid, for example, acetic acid (C ₂ ) (C ₂ represents a carbon number, which is equivalent to R ¹ C, R ² C, R ³ C or R ⁴ C has the same number of carbon atoms, the same), propionic acid (C ₃ ), butyric acid (C ₄ ) and its isomers, for example, 2-methylpropionic acid (C ₄ ), valeric acid (C ₅ ) and its isomers, for example, 2-methylbutyric acid (C ₅ ), 2,2-dimethylpropionic acid (C ₅ ), caproic acid (C ₆ ), heptanoic acid (C) ₇ ), octanoic acid (C ₈ ) and its isomers, for example, 2-ethylhexanoic acid (C ₈ ), citric acid (C ₉ ), citric acid (C ₁₀ ), dodecanoic acid (C ₁₂ ) , tetradecanoic acid (C ₁₄ ), hexadecanoic acid (C ₁₆ ), heptadecanoic acid (C ₁₇ ), octadecanoic acid (C ₁₈ ), icosonic acid (C ₂₀ ), behenic acid (C ₂₂ ), lignoceric acid (C _24), twenty-six acid (C _26), twenty-eight acid (C _28), thirty acid (C _30), etc., are not enumerated herein and equivalents differentiation Thereof.

Further, the above fatty acid may be an unsaturated fatty acid. As the above unsaturated fatty acid, for example, a C ₃ - C ₂₀ unsaturated fatty acid, for example, a monounsaturated fatty acid, for example, crotonic acid (C ₄ ), 9-tetradecenoic acid (C ₁₄ ), or palmitic acid (C) _16), oleic acid (C _{18 is),} elaidic acid (C _{18 is),} trans vaccenic acid (C _{18 is),} 9- cis Gan carbon acid (C _{20 is),} eicosenoic acid (C ₂₀ ) an iso-, di-unsaturated fatty acid, for example, linoleic acid (C ₁₈ ), eicosadienoic acid (C ₂₀ ), etc., a triunsaturated fatty acid, for example, linoleic oleic acid, for example, α-linseed oil Acid (C ₁₈ ) and γ-linolenic acid (C ₁₈ ), pinolenic acid (C ₁₈ ), tung acid, for example, α-tungstic acid (C ₁₈ ) and β-tungstic acid (C) ₁₈ ), Mead acid (C ₂₀ ), dihomo-γ-linolenic acid (C ₂₀ ), arachidonic acid (C ₂₀ ), etc., tetraunsaturated fatty acids, for example, stearidonic acid (C ₂₀ ), arachidonic acid (C ₂₀ ), arachidonic acid (C ₂₀ ), etc., penta-unsaturated fatty acids, for example, bosseopentaenoic acid (C ₁₈ ), eicosapentaenoic acid (C ₂₀ ), etc. And some of these hydrogen atom additions.

The ester of the pentaerythritol and the fatty acid is preferably an ester of pentaerythritol and a fatty acid derived from a saturated fatty acid, that is, an ester of pentaerythritol and a saturated fatty acid, in consideration of the possibility of reforming due to oxidation or the like.

Further, as the ester of the pentaerythritol and the fatty acid, a diester, a triester or a tetraester is preferable, and a triester or a tetraester is more preferable from the viewpoint of reducing the value of the water holding ratio, and a tetraester is preferable.

In view of the fact that the IOB is set to be from about 0.00 to about 0.60, the carbon number of the fatty acid constituting the tetraester of pentaerythritol and a fatty acid is added to the tetraester of the pentaerythritol and the fatty acid, that is, in the above formula (1). The total number of carbon atoms in the R ¹ C, R ² C, R ³ C and R ⁴ C moieties is preferably about 15 (when the total number of carbon atoms is 15, the IOB is 0.60).

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

In view of the fact that the IOB is set to be from about 0.00 to about 0.60, the number of carbon atoms of the fatty acid constituting the triesters of pentaerythritol and a fatty acid is added to the above-mentioned pentaerythritol and a fatty acid triester, that is, in the above formula (2). The total number of carbon atoms in the R ¹ C, R ² C and R ³ C moieties is preferably about 19 or more (when the total number of carbon atoms is 19, IOB is 0.58).

In view of the fact that the IOB is set to be from about 0.00 to about 0.60, the carbon number of the fatty acid constituting the diester of pentaerythritol and a fatty acid is added to the diester of the pentaerythritol and the fatty acid, that is, in the above formula (3). The total number of carbon atoms in the R ¹ C and R ² C moieties is preferably about 22 or more (when the total number of carbon atoms is 22, IOB is 0.59).

In view of the fact that the IOB is set to be from about 0.00 to about 0.60, the number of carbon atoms of the fatty acid constituting the monoester of pentaerythritol and a fatty acid in the monoester of the pentaerythritol and the fatty acid, that is, in the above formula (4), The number of carbon atoms in the R ¹ C moiety is preferably about 25 or more (when the number of carbon atoms is 25, the IOB is 0.60).

Moreover, in each calculation of the above IOB, double keys and three are not considered. The effects of the bond, iso branch, and tert branch (the same applies below).

As a commercial product of the above-mentioned ester of pentaerythritol and a fatty acid, there are listed Unister H-408BRS, H-2408BRS-22 (mixed product), etc. (above, manufactured by Nippon Oil Co., Ltd.).

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

As the ester of the above chain hydrocarbon triol and at least one fatty acid, for example, 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)

Monoester of glycerol and fatty acids.

As the fatty acid (R ⁵ COOH, R ⁶ COOH and R ⁷ COOH) constituting the above-mentioned ester of glycerin and a fatty acid, as long as the ester of glycerin and fatty acid satisfies the above-mentioned dynamic viscosity, water retention ratio and weight average molecular weight, there is no particular The fatty acid exemplified in the "(a ₁ ) chain hydrocarbon tetraol and at least one fatty acid ester", that is, the saturated fatty acid and the unsaturated fatty acid, for example, is considered to be modified by oxidation or the like. The possibility is preferably an ester of glycerin and a fatty acid derived from a saturated fatty acid, that is, an ester of glycerin and a saturated fatty acid.

Further, as the ester of the glycerin and the fatty acid, a diester or a triester is preferable, and a triester is more preferable from the viewpoint of reducing the value of the water holding ratio.

The above-mentioned triglyceride of glycerin and fatty acid is also called triglyceride, for example, a triester of glycerin and caprylic acid (C ₈ ), a triester of glycerin and capric acid (C ₁₀ ), a triester of glycerin and dodecanoic acid (C ₁₂ ). And glycerol and a triester of two or three fatty acids, and mixtures thereof.

As the triester of the above glycerin and two or more kinds of fatty acids, for example, a triester of glycerin and caprylic acid (C ₈ ) and capric acid (C ₁₀ ), glycerin and caprylic acid (C ₈ ), capric acid (C ₁₀ ) and twelve Acid (C ₁₂ ) triester, glycerin and octanoic acid (C ₈ ), citric acid (C ₁₀ ), dodecanoic acid (C ₁₂ ), tetradecanoic acid (C ₁₄ ), hexadecanoic acid (C ₁₆ ) and A triester of an acid (C ₁₈ ) or the like.

In view of the fact that the melting point is set to be about 45 ° C or lower, the triglyceride of the glycerin and the fatty acid is a total of the number of carbon atoms of the fatty acid constituting the triester of glycerin and the fatty acid, that is, in the formula (5), R ⁵ The total number of carbon atoms in the C, R ⁶ C and R ⁷ C moieties is preferably about 40 or less.

In view of the fact that the IOB is set to be from about 0.00 to about 0.60, the number of carbon atoms of the fatty acid constituting the triester of glycerin and the fatty acid is totaled in the above-mentioned triglyceride of glycerin and fatty acid, that is, in the formula (5), The total number of carbon atoms in the R ⁵ C, R ⁶ C and R ⁷ C moieties is preferably about 12 or more (when the total number of carbon atoms is 12, the IOB is 0.60).

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

As a commercial product of the above-mentioned glycerin and a fatty acid triester, for example, tricocohol fatty acid glyceride, NA36, Panacet 800, Panacet 800B, and Panacet 810S, and three C2L oil fatty acid glycerides and tri-CL oil fatty acid glycerides (above, Nippon Oil Co., Ltd.) Company system) and so on.

The above diglyceride of glycerin and fatty acid is also called diglyceride, for example, diester of glycerin and capric acid (C ₁₀ ), diester of glycerin and dodecanoic acid (C ₁₂ ), glycerol and palmitic acid (C ₁₆ ) Diesters, and diesters of glycerol and two fatty acids, and mixtures thereof.

In view of the fact that the IOB is set to be from about 0.00 to about 0.60, the carbon number of the fatty acid constituting the diester of glycerin and the fatty acid is added to the diester of the glycerin and the fatty acid, that is, in the formula (6), The total number of carbon atoms in the R ⁵ C and R ⁶ C moieties is preferably about 16 or more (when the total number of carbon atoms is 16, the IOB is 0.58).

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

In view of the fact that the IOB is set to be from about 0.00 to about 0.60, the number of carbon atoms of the fatty acid constituting the monoester of glycerin and the fatty acid in the monoester of the glycerin and the fatty acid, that is, R ^{5 in the} formula (7) The number of carbon atoms in the C moiety is preferably about 19 or more (when the number of carbon atoms is 19, the IOB is 0.59).

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

As the ester of the chain hydrocarbon diol and at least one fatty acid, for example, a C ₂ -C ₆ chain hydrocarbon diol, for example, a C ₂ -C ₆ diol, for example, ethylene glycol, propylene glycol, A monoester or diester of butanediol, pentanediol or hexanediol with a fatty acid.

Specifically, as the ester of the above chain hydrocarbon diol and at least one fatty acid, for example, the following formula (8): R ⁸ COOC _k H _2k OCOR ⁹ (8)

(wherein k is an integer from 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 the following formula (9): R ⁸ COOC _k H _2k OH (9)

(where k is an integer from 2 to 6, and R ⁸ is a chain hydrocarbon)

a monoester of a C ₂ ~C ₆ diol and a fatty acid.

Among the above esters of C ₂ -C ₆ diol and fatty acid, as a fatty acid to be esterified (corresponding to R ⁸ COOH and R ⁹ COOH in the formulas (8) and (9)), C ₂ -C ₆ diol The ester with a fatty acid is not particularly limited as long as it satisfies the above-mentioned dynamic viscosity, water retention ratio, and weight average molecular weight, for example, "(a ₁ ) chain hydrocarbon tetraol and at least one fatty acid ester" The listed fatty acids, that is, saturated fatty acids and unsaturated fatty acids, are preferred, and saturated fatty acids are preferred in view of the possibility of upgrading due to oxidation or the like.

The carbon number of the R ⁸ C and R ⁹ C moieties in the diester of the butanediol (k=4) and the fatty acid represented by the formula (8) from the viewpoint of setting the IOB to about 0.00 to about 0.60. The total amount is preferably about 6 or more (when the total number of carbon atoms is 6, the IOB is 0.60).

In view of the fact that the IOB is set to be from about 0.00 to about 0.60, in the monoester of the ethylene glycol (k=2) represented by the formula (9) and the fatty acid, the number of carbon atoms of the R ⁸ C moiety is preferably about 12 or more (when the number of carbon atoms is 12, the IOB is 0.57).

The ester of the C ₂ -C ₆ diol and the fatty acid is preferably an ester of a C ₂ -C ₆ diol derived from a saturated fatty acid and a fatty acid, that is, C, in consideration of the possibility of reforming due to oxidation or the like. ₂ ~ C ₆ diol and ester of saturated fatty acids.

Further, as the ester of the C ₂ -C ₆ diol and the fatty acid, from the viewpoint of reducing the value of the water absorbing ratio, it is preferably an ester of a diol derived from a diol having a large carbon number and a fatty acid, for example, An ester of a diol derived from butanediol, pentanediol or hexanediol with a fatty acid.

Further, as the ester of the C ₂ -C ₆ diol and the fatty acid, a diester is preferred from the viewpoint of reducing the value of the water absorbing ratio.

As a commercial product of the above-mentioned ester of a C ₂ -C ₆ diol and a fatty acid, for example, comupoal BL, comupoal BS (above, manufactured by Nippon Oil Co., Ltd.) and the like.

[(B) The ether of (B1) and (B2), wherein (B1) is a compound having a chain hydrocarbon moiety and 2 to 4 hydroxyl groups which replace a hydrogen atom of the above-mentioned chain hydrocarbon moiety, and (B2) has a chain a hydrocarbon moiety and a compound which replaces one hydroxyl group of a hydrogen atom of the above chain hydrocarbon moiety]

(B) an ether of (B1) and (B2), wherein (B1) is a compound having a chain hydrocarbon moiety and 2 to 4 hydroxyl groups which replace a hydrogen atom of the above chain hydrocarbon moiety, and (B2) has a chain shape The hydrocarbon moiety and the compound which replaces one hydroxyl group of the hydrogen atom of the above-mentioned chain hydrocarbon moiety (hereinafter, also referred to as "compound (B)") have all of the hydroxyl groups as long as they have the above-mentioned dynamic viscosity, water retention ratio and weight average molecular weight. It can also be etherified.

(B1) 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 (B1)") is used as the "compound (A)" The compound (A1) is exemplified by pentaerythritol, glycerin, and a diol.

(B2) a compound having a chain hydrocarbon moiety and a hydroxyl group replacing a 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 a hydroxyl group (-OH), for example, an aliphatic monovalent alcohol, for example, a saturated aliphatic monovalent alcohol and an unsaturated aliphatic monovalent alcohol.

The saturated aliphatic monovalent alcohol, for example, a C ₁ to C ₂₀ saturated aliphatic monovalent alcohol, for example, methyl alcohol (C ₁ ) (C ₁ represents a carbon number, the same applies hereinafter), ethyl alcohol (C) ₂ ), propyl alcohol (C ₃ ) and its isomers, for example, isopropyl alcohol (C ₃ ), butyl alcohol (C ₄ ) and its isomers, for example, 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 their equivalents Isomers, for example, 2-ethylhexyl alcohol (C ₈ ), mercapto alcohol (C ₉ ), mercapto alcohol (C ₁₀ ), dodecyl alcohol (C ₁₂ ), tetradecyl alcohol (C ₁₄ ) , hexamethylene alcohol (C ₁₆ ), heptadecyl alcohol (C ₁₇ ), octadecyl alcohol (C ₁₈ ), and eicosyl alcohol (C ₂₀ ), and the equivalent isomers not enumerated.

As the unsaturated aliphatic monovalent alcohol, for example, one CC single bond of the above saturated aliphatic monovalent alcohol is substituted with a C=C double bond, for example, oleyl alcohol, for example, sold by New Japan Physical and Chemical Co., Ltd. The names of the RIKACOL series and the UNJECOL series are sold.

As the compound (B), for example, an ether of a (b ₁ ) chain hydrocarbon tetraol and at least one aliphatic monovalent alcohol, for example, a monoether, a diether, a triether, and a tetraether, preferably a diether, a triether and a tetraether, more preferably a triether and a tetraether, and most preferably a tetraether, (b ₂ ) a chain hydrocarbon triol and an ether of at least one aliphatic monovalent alcohol, for example, a monoether, two The ether and the triether, preferably a diether and a triether, and more preferably a triether, and an ether of the (b ₃ ) chain hydrocarbon diol and at least one aliphatic monovalent alcohol, for example, a monoether and a second Ether, and preferably diether.

As the ether of the above chain hydrocarbon tetraol and at least one aliphatic monovalent alcohol, for example, the following formulas (10) to (13):

(wherein R ¹⁰ to R ¹³ are each a chain hydrocarbon.)

The pentaerythritol and the tetraether, triether, diether and monoether of the aliphatic monovalent alcohol.

As the ether of the above chain hydrocarbon triol and at least one aliphatic monovalent alcohol, for example, the following formulas (14) to (16):

(wherein R ¹⁴ to R ¹⁶ are each a chain hydrocarbon.)

The triglyceride, diether and monoether of glycerol and aliphatic monovalent alcohol.

As the ether of the above chain hydrocarbon diol and at least one aliphatic monovalent alcohol, the following formula (17): R ¹⁷ OC _n H _2n OR ¹⁸ (17)

(wherein n is an integer from 2 to 6, and R ¹⁷ and R ¹⁸ are each a chain hydrocarbon)

a diether of a C ₂ -C ₆ diol and an aliphatic monovalent alcohol, and the following formula (18): R ¹⁷ OC _n H _2n OH (18)

(wherein n is an integer from 2 to 6, and R ¹⁷ is a chain hydrocarbon)

a monoether of a C ₂ -C ₆ diol with an aliphatic monovalent alcohol.

In view of the fact that the IOB is set to be from about 0.00 to about 0.60, the carbon atoms of the aliphatic monovalent alcohol constituting the tetraether of the pentaerythritol and the aliphatic monovalent alcohol are added to the tetraether of the pentaerythritol and the aliphatic monovalent alcohol. In the above formula (10), the total number of carbon atoms in the portions R ¹⁰ , R ¹¹ , R ¹² and R ¹³ is preferably about 4 or more (when the total number of carbon atoms is 4, IOB) Is 0.44).

In view of the fact that the IOB is set to be from about 0.00 to about 0.60, the carbon atoms of the aliphatic monovalent alcohol constituting the triether of the pentaerythritol and the aliphatic monovalent alcohol are added to the above-mentioned pentaerythritol and the trivalent ether of the aliphatic monovalent alcohol. In the above formula (11), the total number of carbon atoms in the R ¹⁰ , R ¹¹ and R ¹² portions is preferably about 9 or more (when the total number of carbon atoms is 9, the IOB is 0.57) .

In view of the fact that the IOB is set to be from about 0.00 to about 0.60, in the diether of the above pentaerythritol and the aliphatic monovalent alcohol, the carbon atoms of the aliphatic monovalent alcohol constituting the diether of the pentaerythritol and the aliphatic monovalent alcohol are combined. In the above formula (12), the total number of carbon atoms in the R ¹⁰ and R ¹¹ portions is preferably about 15 or more (when the total number of carbon atoms is 15, the IOB is 0.60).

The carbon number of the aliphatic monovalent alcohol constituting the monoether of pentaerythritol and the aliphatic monovalent alcohol in the monoether of the above pentaerythritol and the aliphatic monovalent alcohol from the viewpoint of setting the IOB to about 0.00 to about 0.60. That is, in the above formula (13), the number of carbon atoms in the R ¹⁰ portion is preferably about 22 or more (when the number of carbon atoms is 22, IOB is 0.59).

Further, in consideration of the fact that the IOB is set to be from about 0.00 to about 0.60, in the triether of the above glycerin and the aliphatic monovalent alcohol, the aliphatic monovalent alcohol constituting the triether of glycerin and the aliphatic monovalent alcohol is added in total. The number of carbon atoms, that is, in the formula (14), the total number of carbon atoms in the R ¹⁴ , R ¹⁵ and R ¹⁶ portions is preferably about 3 or more (when the total number of carbon atoms is 3, the IOB is 0.50) ).

In view of the fact that the IOB is set to be from about 0.00 to about 0.60, the carbon atoms of the aliphatic monovalent alcohol constituting the diether of glycerin and the aliphatic monovalent alcohol are added to the diether of the above glycerin and the aliphatic monovalent alcohol. In the formula (15), the total number of carbon atoms in the R ¹⁴ and R ¹⁵ moieties is preferably about 9 or more (when the total number of carbon atoms is 9, the IOB is 0.58).

The carbon number of the aliphatic monovalent alcohol constituting the monoether of glycerin and the aliphatic monovalent alcohol in the monoether of the above glycerin and the aliphatic monovalent alcohol from the viewpoint of setting the IOB to about 0.00 to about 0.60. That is, in the formula (16), the number of carbon atoms in the R ¹⁴ moiety is preferably about 16 or more (when the number of carbon atoms is 16, the IOB is 0.58).

The carbon atom of the R ¹⁷ and R ¹⁸ moieties in the diether of the butanediol (n=4) represented by the formula (17) and the aliphatic monovalent alcohol, in view of considering the IOB to be from about 0.00 to about 0.60. The total number is preferably about 2 or more (when the total number of carbon atoms is 2, the IOB is 0.33).

Further, in consideration of the fact that the IOB is set to be from about 0.00 to about 0.60, the number of carbon atoms of the R ¹⁷ moiety in the monoether of the ethylene glycol (n=2) represented by the formula (18) and the aliphatic monovalent alcohol It is preferably about 8 or more (when the number of carbon atoms is 8, the IOB is 0.60).

Compound (B) is by, for example, compound (B1) And the compound (B2) is produced by dehydration condensation in the presence of an acid catalyst.

[(C) (C1) and (C2), wherein (C1) is a carboxylic acid, a hydroxy acid, an alkoxy group comprising a chain hydrocarbon moiety and a 2-4 carboxyl group substituted for a hydrogen atom of the above chain hydrocarbon moiety; An acid or an oxo acid, (C2) is a compound having a chain hydrocarbon moiety and a hydroxyl group replacing a hydrogen atom of the above chain hydrocarbon moiety]

(C) an ester of (C1) and (C2), wherein (C1) is a carboxylic acid comprising a chain hydrocarbon moiety and a 2-4 carboxyl group substituted for a hydrogen atom of the above chain hydrocarbon moiety, a hydroxy acid, an alkoxylate Or an oxo acid, (C2) is 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 (C)"), as long as it has the above-mentioned dynamic viscosity. The water retention ratio and the weight average molecular weight, and not all of the carboxyl groups may be esterified.

a carboxylic acid, a hydroxy acid, an alkoxy acid or an oxo acid containing (2) a chain hydrocarbon moiety (C1) and a hydrogen atom replacing the hydrogen atom of the chain hydrocarbon moiety (hereinafter, also referred to as "compound (C1) ")), for example, a chain hydrocarbon carboxylic acid having 2 to 4 carboxyl groups, for example, a chain hydrocarbon dicarboxylic acid, for example, an alkane dicarboxylic acid, for example, ethanedioic acid, propane diacid, butanedioic acid , pentanedioic acid, hexanedioic acid, heptanedioic acid, octanedioic acid, decanedioic acid and decanedioic acid, chain hydrocarbon tricarboxylic acid, for example, alkanetricarboxylic acid, for example, propane tricarboxylic acid Butane tricarboxylic acid, pentane tricarboxylic acid, hexane tricarboxylic acid, heptane triacid, octane tricarboxylic acid, decane tricarboxylic acid and decane tricarboxylic acid, and chain hydrocarbon tetracarboxylic acid, for example, alkane tetracarboxylic acid For example, butane tetraacid, pentane tetracarboxylic acid, hexane tetracarboxylic acid, g Alkanetetracarboxylic acid, octane tetracarboxylic acid, decane tetracarboxylic acid and decane tetracarboxylic acid.

Further, the compound (C1) contains a chain hydrocarbon hydroxy acid having 2 to 4 carboxyl groups, for example, malic acid, tartaric acid, citric acid, isocitric acid, etc., and a chain hydrocarbon alkoxylate having 2 to 4 carboxyl groups. For example, it contains O-acetonitrile citric acid, and a chain hydrocarbon oxyacid having 2 to 4 carboxyl groups.

The compound having a chain hydrocarbon moiety (C2) and a hydroxyl group which replaces the hydrogen atom of the chain hydrocarbon moiety, and the "compound (B)" are, for example, an aliphatic monovalent 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 oxo acid, and an ester of at least one aliphatic monovalent alcohol, for example, Monoesters, diesters, triesters and tetraesters, preferably diesters, triesters and tetraesters, more preferably triesters and triesters, and most preferably tetraesters, (c ₂ ) having 3 carboxyl chains An ester of a hydrocarbon tricarboxylic acid, a hydroxy acid, an alkoxy acid or an oxo acid, and at least one aliphatic monovalent alcohol, for example, a monoester, a diester and a triester, preferably a diester and a triester, and More preferably, it is a triester, and (c ₃ ) a chain hydrocarbon dicarboxylic acid having two carboxyl groups, a hydroxy acid, an alkoxy acid or an oxo acid, and an ester with at least one aliphatic monovalent alcohol, for example, a monoester And a diester, preferably a diester.

Examples of the compound (C) include, for example, dioctyl adipate and tributyl ethoxide, O-acetyl citrate, and are commercially available.

[(D) having a chain hydrocarbon moiety and an ether bond (-O-), a carbonyl bond (-CO-), an ester bond (-COO-) interposed between the CC single bond inserted into the above-mentioned chain hydrocarbon moiety. And the carbonate bond (-OCOO-) a bonded compound]

As (D) having a chain hydrocarbon moiety and a CC bond inserted into the above-mentioned chain hydrocarbon moiety, it is selected from an ether bond (-O-), a carbonyl bond (-CO-), and an ester bond (-COO-). And a compound (hereinafter, also referred to as "compound (D)") which is bonded to any one of the groups of the carbonate bond (-OCOO-), and examples thereof include (d ₁ ) an aliphatic monovalent alcohol and An aliphatic monovalent alcohol ether, (d ₂ ) dialkyl ketone, (d ₃ ) fatty acid and an aliphatic monovalent alcohol ester, and (d ₄ ) dialkyl carbonate.

[(d ₁ ) an ether of an aliphatic monovalent alcohol and an aliphatic monovalent alcohol]

The ether of the aliphatic monovalent alcohol and the aliphatic monovalent alcohol may, for example, be a compound having the following formula (19): R ¹⁹ OR ²⁰ (19)

(wherein R ¹⁹ and R ²⁰ are each a chain hydrocarbon).

The aliphatic monovalent alcohol constituting the ether (corresponding to R ¹⁹ OH and R ²⁰ OH in the formula (19)), the ether having no such dynamic viscosity, water retention ratio and weight average molecular weight, The aliphatic monovalent alcohol exemplified in the item "Compound (B)" is exemplified as a specific limitation.

[(d ₂ )dialkyl ketone]

The dialkyl ketone may, for example, be a compound having the following formula (20): R ²¹ COR ²² (20)

(wherein R ²¹ and R ²² are each an alkyl group).

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

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

As the ester of the above fatty acid and an aliphatic monovalent alcohol, for example, a compound having the following formula (21): R ²³ COOR ²⁴ (21)

(wherein R ²³ and R ²⁴ are each a chain hydrocarbon).

The fatty acid constituting the above-mentioned ester (corresponding to R ²³ COOH in the formula (21)), for example, the fatty acid listed in the "(a ₁ ) chain hydrocarbon tetraol and fatty acid ester", that is, a saturated fatty acid or For unsaturated fatty acids, saturated fatty acids are preferred in view of the possibility of upgrading due to oxidation or the like. The aliphatic monovalent alcohol constituting the above ester (corresponding to R ²⁴ OH in the formula (21)), for example, the aliphatic monovalent alcohol exemplified in the item "compound (B)".

As an example of the ester of the above fatty acid and an aliphatic monovalent alcohol, for example, dodecanoic acid (C ₁₂ ), ester with dodecyl alcohol (C ₁₂ ), tetradecanoic acid (C ₁₄ ), and dodecyl alcohol ( C _12), etc., esters of monovalent alcohols of the above-described fatty acid as a commercially available product with aliphatic, e.g., ELECTOLWE20, and ELECTOLWE40 (or more shares of NOF Corporation).

[(d ₄ )Dialkyl carbonate]

As the above dialkyl carbonate, for example, a compound having the following formula (22): R ²⁵ OC(=O)OR ²⁶ (22)

(wherein R ²⁵ and R ²⁶ are each an alkyl group).

The above dialkyl carbonates can be reacted, for example, by the reaction of carbonyl dichloride with an alcohol, the reaction of a chlorinated formate with an alcohol or an alcoholate, and the reaction of silver carbonate with an alkyl iodide, in addition to being commercially available. synthesis.

Considering the water holding ratio, vapor pressure, and the like, (d ₁ ) an aliphatic monovalent alcohol and an aliphatic monovalent alcohol ether, (d ₂ ) dialkyl ketone, (d ₃ ) fatty acid, and an aliphatic monovalent alcohol The ester and the (d ₄ ) dialkyl carbonate preferably have a weight average molecular weight of about 100 or more, and more preferably about 200 or more.

Further, in the (d ₂ ) dialkyl ketone, when the total number of carbon atoms is about 8, the melting point of 5-nonanone is, for example, about -50 ° C, and the vapor pressure is about 230 Pa at 20 ° C.

[(E) polyoxy C ₃ ~ C ₆ alkylene glycol, or alkyl ester or alkyl ether thereof]

(E) polyoxy C ₃ -C ₆ alkylene glycol, or an alkyl ester or alkyl ether thereof (hereinafter, also referred to as compound (E)), for example, (e ₁ ) polyoxy C ₃ ~ C ₆ alkylene glycol, (e ₂ ) polyoxy C ₃ ~ C ₆ alkylene glycol and at least one fatty acid ester, (e ₃ ) polyoxy C ₃ ~ C ₆ alkylene glycol and at least An aliphatic monovalent alcohol ether. The following description will be made.

[(e ₁ ) polyoxy C ₃ ~ C ₆ alkylene glycol]

The above polyoxy C ₃ -C ₆ alkylene glycol means i) an oxygen C ₃ -C ₆ alkylene skeleton, that is, having an oxypropylene skeleton, an oxybutylene skeleton, an oxopene skeleton, a homopolymer having a skeleton of a group consisting of an oxyhexene skeleton and having a hydroxyl group at both terminals, ii) a block having two or more skeletons selected from the above group and having a hydroxyl group at both terminals The copolymer, or iii) a random copolymer having two or more skeletons selected from the above group and having a hydroxyl group at both terminals.

The above polyoxy C ₃ -C ₆ alkylene glycol is represented by the following formula (23): HO-(C _m H _2m O) _n -H (23)

(where m is an integer from 3 to 6).

After confirming by the inventors, in the case of polypropylene glycol (the homopolymer of m=3 in the formula (23)), when the weight average molecular weight was less than about 1,000, it was found that the water holding ratio was not satisfied. Therefore, in the range of the above-mentioned blood slip imparting agent, a homopolymer of polypropylene glycol is not contained, and propylene glycol should be used as a copolymer or a random polymer with other diols, and is contained in (e ₁ ) polyoxy C _{3 .} ~C ₆ alkylene glycol.

In addition, after confirming by the inventors, in polyethylene glycol (the homopolymer of m=2 in the formula (23)), when the weight average molecular weight is less than 1,000, the dynamic viscosity and the water holding ratio are not satisfied. The essentials.

When considering the viewpoint of setting IOB to about 0.00 to about 0.60, for example, when formula (23) is polytetramethylene glycol (m=4 isomer), it is preferably n≧ about 7 (n=7) , IOB is 0.57).

As a commercial product of the above-mentioned poly C ₃ -C ₆ alkylene glycol, for example, uniol (trademark) PB-500 and PB-700 (above, manufactured by Nippon Oil Co., Ltd.).

[(e ₂ ) polyoxy C ₃ ~ C ₆ alkylene glycol and at least one fatty acid ester]

Examples of the polyoxy C ₃ ~ C ₆ alkylene glycol and at least one of a fatty acid ester includes, for example, "(e ₁₎ polyoxy C ₃ ~ C ₆ alkylene glycol" as described polyoxy C ₃ One or both of the OH ends of the ~C ₆ alkylene glycol are esterified by fatty acids, that is, monoesters and diesters.

In the ester of polyoxy C ₃ ~ C ₆ alkylene glycol and at least one fatty acid, as a fatty acid to be esterified, for example, "(a ₁ ) chain hydrocarbon tetraol and ester of at least one fatty acid" The fatty acids listed, that is, saturated fatty acids or unsaturated fatty acids, are preferably saturated fatty acids in consideration of the possibility of upgrading due to oxidation or the like.

[(e ₃ ) polyoxy C ₃ ~ C ₆ alkylene glycol and at least one aliphatic monovalent alcohol ether]

The ether of the polyoxy C ₃ -C ₆ alkylene glycol and at least one aliphatic monovalent alcohol may, for example, be described in "(e ₁ ) polyoxy C ₃ -C ₆ alkylene glycol" One or both of the OH ends of the polyoxy C ₃ -C ₆ alkylene glycol are etherified by an aliphatic monovalent alcohol, that is, a monoether and a diether.

In the ether of a polyoxy C ₃ -C ₆ alkylene glycol and at least one aliphatic monovalent alcohol, the aliphatic monovalent alcohol to be etherified may, for example, be listed in the item "Compound (B)" An aliphatic monovalent alcohol.

[(F) chain hydrocarbon]

As the above chain hydrocarbon, for example, (f ₁ ) chain alkane, for example, a linear alkane and a branched paraffin. When the melting point of the linear alkane is about 45 ° C or lower, the number of carbon atoms is about 22 or less, and when the vapor pressure is about 0.01 Pa or less at 1 atm and 25 ° C, the number of carbon atoms is about 13 or more. Branched paraffins have a tendency to have a lower melting point than the linear alkanes at the same number of carbon atoms. Therefore, when the melting point of the branched paraffin is about 45 ° C or lower, the number of carbon atoms is also 22 or more.

As a commercial product of the said hydrocarbon, Parleam6 (Nippon Oil Co., Ltd.) is mentioned, for example.

In an absorbent article according to an embodiment of the present invention, the region containing the blood slip property imparting agent includes the above-described blood slip property imparting agent.

In the absorbent article according to another embodiment of the present invention, the region containing the blood slip property imparting agent is formed only by the above-described blood slip property imparting agent. In other words, the protruding portion of the top sheet has a region containing the blood slip imparting agent only composed of the blood slip imparting agent.

In the absorbent article according to another embodiment of the present invention, the region containing the blood slip property imparting agent is a composition comprising the above-described blood slip property imparting agent and at least one other component containing a blood slip property imparting agent. . In other words, in the absorbent article according to another embodiment of the present invention, the protruding portion of the top sheet has a composition containing a blood slip property imparting agent and at least one other component containing a blood slip imparting agent. The area containing the blood slip imparting agent.

Hereinafter, the composition containing the blood slip imparting agent will be described.

[Composition containing a blood slip imparting agent]

A composition containing a blood slip property-imparting agent comprising the above-described blood slip property-imparting agent and at least one other component. The at least one other component described above is not particularly limited as long as it does not impair the effects of the present invention, and examples thereof include absorbent articles in the industry, and particularly those which are customarily applied to the top sheet.

Examples of the at least one other component described above include eucalyptus oil, hydrazine, and fluorene-based vinyl resin.

The at least one other component mentioned above may, for example, be an antioxidant, for example, BHT (2,6-di-t-butyl-p-cresol), BHA (butylated hydroxyanisole), or Propionate and the like.

As at least one other component mentioned above, for example, a vitamin, for example, a natural vitamin or a synthetic vitamin. As the above vitamins, for example, water-soluble vitamins, for example, vitamin B group, for example, vitamin B ₁ , vitamin B ₂ , vitamin B ₃ , vitamin B ₅ , vitamin B ₆ , vitamin B ₇ , vitamin B ₉ , vitamin B _{12 ,} etc. , vitamin C.

As the above-mentioned vitamin, for example, a fat-soluble vitamin, for example, a vitamin A group, a vitamin D group, a vitamin E group, and a vitamin K group.

These vitamins also contain such derivatives.

Examples of the at least one other component described above include, for example, alanine, arginine, lysine, histidine, proline, hydroxyproline, and the like.

As at least one of the other components described above, for example, Zeolites, for example, natural zeolites, for example, analcime, chabazite, stilbite, sodium zeolite, bundled zeolite, and samarium manganese silver ore, and synthetic zeolites.

The at least one other component mentioned above may, for example, be cholesterol, hyaluronic acid, egg yolk, or ceramide.

Further, examples of the at least one other component mentioned above include a skin astringent, an anti-acne agent, an anti-wrinkle agent, an anti-subcutaneous fat agent, a whitening agent, an antibacterial agent, and an antifungal agent.

Examples of the skin astringent agent include zinc oxide, aluminum sulfate, tannic acid, and the like, and oil-soluble skin astringents, for example, oil-soluble polyphenols. As the oil-soluble polyphenol, the natural oil-soluble polyphenol may, for example, be a barley bark extract, a hypericum extract, a stalk extract, a chamomile extract, an burdock extract, a sage extract, Linden extract, western eucalyptus extract, birch extract, Equisetum extract, sage extract, sage leaf extract, walnut extract, hibiscus extract, eucalyptus extract, eucalyptus extract , hop extract, sweet chestnut extract, eucalyptus seed extract, etc.

Examples of the anti-acne agent include salicylic acid, benzammonium peroxide, resorcinol, sulfur, erythromycin, zinc, and the like.

Examples of the anti-wrinkle agent include lactic acid, salicylic acid, a salicylic acid derivative, glycolic acid, inositol hexaphosphate, lipoic acid, and phosphatidic acid.

The anti-subcutaneous fat agent may, for example, be a dioxin compound, for example, an amine, a caffeine, a theophylline, a cocoa, or the like.

As the above whitening agent, for example, nicotine, citric acid, arbutin, chitosan and derivatives, phytosterol derivatives, ascorbic acid and derivatives thereof may be mentioned. Objects, as well as mulberry extracts and placenta extracts.

Further, as at least one of the other components described above, for example, an anti-inflammatory component, a pH adjuster, an antibacterial agent, a moisturizer, a fragrance, a coloring matter, a dye, a pigment, a plant extract, and the like. Examples of the anti-inflammatory component include natural anti-inflammatory agents such as peony, scutellaria, hypericum, chamomile, licorice, peach blossom, wormwood, perilla extract, and the like, and synthetic anti-inflammatory agents, for example, B. Internal carbamide, potassium dihydroglycyrrhizin and the like.

As the pH adjuster, in order to keep the skin weakly acidic, for example, malic acid, succinic acid, citric acid, tartaric acid, lactic acid or the like.

As the pigment, for example, titanium dioxide can be mentioned.

The composition containing the blood-slipness-imparting agent contains a blood-slipness-imparting agent and at least one other component, and each of them is preferably from about 50 to about 99% by mass and from about 1 to about 50% by mass, more preferably about 60%. About 99% by mass and about 1 to about 40% by mass, most preferably from about 70 to about 99% by mass and from about 1 to about 30% by mass, more preferably from about 80 to about 99% by mass and from about 1 to about 20% by mass %, more preferably from about 90 to 99% by mass and from about 1 to about 10% by mass, and still more preferably from about 95 to 99% by mass and from about 1 to about 5% by mass, from the viewpoint of the effect of the present invention .

It is preferable that the composition containing the blood-slipness-imparting agent contains a surfactant in an amount of less than the amount of the hydrophilization treatment from the top sheet or the second sheet. More specifically, the composition containing the blood slip imparting agent contains a surfactant, and preferably contains from about 0.0 to about 1.0 g/m ² , more preferably from about 0.0 to about 0.8 g/m ² , most preferably It is in the range of from about 0.1 to about 0.5 g/m ² , and more preferably from about 0.1 to about 0.3 g/m ² .

This is because if the amount of the surfactant increases, there is a tendency that menstrual blood tends to remain on the top sheet. Moreover, the surfactant does not have a value of water retention. This is because the layer of the substance to be measured does not exist because it is mixed with water.

The composition containing the blood slip imparting agent contains water, preferably from about 0.0 to about 1.0 g/m ² , more preferably from about 0.0 to about 0.8 g/m ² , most preferably from about 0.1 to about 0.5 g/ m ² , and more preferably in the range of from about 0.1 to about 0.3 g/m ² basis weight.

Water is less preferred because of the reduced absorption properties of the absorbent article.

The composition containing the blood-slipness-imparting agent is the same as the blood-slipness-imparting agent, and preferably has a dynamic viscosity of about 0 to about 80 mm ² /s at 40 ° C, more preferably about 1 to 1 as a composition. The dynamic viscosity of about 70 mm ² /s, preferably having a dynamic viscosity of about 3 to about 60 mm ² /s, preferably having a dynamic viscosity of about 5 to about 50 mm ² /s, and preferably having a viscosity of about 7 to about Dynamic viscosity of 45mm ² /s.

When the dynamic viscosity of the composition containing the blood-slipness-imparting agent exceeds about 80 mm ² /s, the viscosity becomes high, and the composition of the menstrual blood and blood-slip-forming agent which reaches the top surface of the sheet is difficult to slide down to absorb. The tendency of the inside of sexual goods.

When the composition containing the blood-slipness-imparting agent contains a component which is mixed with the blood-slipness-imparting agent as at least one of the other components described above, the other component preferably has a weight average molecular weight of less than about 1,000, and more preferably Preferably, it has a weight average molecular weight of less than about 900. This is because if the weight average molecular weight is about 1,000 or more, the composition containing the blood slip imparting agent itself is sticky, giving the user an unpleasant feeling. tendency. In addition, when the weight average molecular weight is high, the viscosity of the composition containing the blood slip imparting agent tends to be high, so that it is difficult to increase the temperature, and the viscosity of the blood slip imparting agent composition is lowered to be suitable for coating. The viscosity, as a result, is a condition in which the blood slip imparting agent has to be diluted with a solvent.

The composition containing the blood slip imparting agent is a composition and has a water holding ratio of about 0.01 to about 4.0% by mass, preferably a water holding ratio of about 0.02 to about 3.5% by mass, more preferably about The water holding ratio of 0.03 to about 3.0% by mass is preferably a water holding ratio of from about 0.04 to about 2.5% by mass, and is preferably a water holding ratio of from about 0.05 to about 2.0% by mass.

When the water absorbing rate is lowered, the affinity of the blood slidability imparting agent composition to menstrual blood is low, and the menstrual blood that reaches the skin surface of the top sheet tends to be difficult to slip into the interior of the absorbent article.

Further, when the composition containing the blood slip property imparting agent contains a solid matter, it is preferably removed by filtration when measuring the dynamic viscosity and the water holding ratio.

The blood slip property-imparting agent or the composition containing the blood-slipness-imparting agent can be applied as a volatile solvent, for example, a coating liquid containing an alcohol-based solvent, an ester-based solvent, or an aromatic solvent. When the coating liquid contains a volatile solvent, the viscosity of the coating liquid containing the composition of the blood slip property imparting agent or the composition containing the blood slip property imparting agent is lowered, and the coating can be easily performed, and the coating is not required. The simplification of the coating process such as heating.

[Manufacturing method of absorbent article]

The top sheet having the protrusions at a particular angle θ can be fabricated, for example, by methods well known in the art. For example, the top sheet in the absorbent article of the present invention is produced according to the method described in JP-A-2008-25080. Further, by separately pressing the top sheet together with the absorbent body or the second sheet and the absorbent body to form an embossing, it is possible to form the top sheet having the projections having a specific angle θ.

The blood slip property-imparting agent or the composition containing the blood-slipness-imparting agent or the coating method containing the coating liquid is not particularly limited, and the blood-slip property-imparting agent or the blood-slip imparting agent may be necessary. The composition or the coating liquid containing the same is heated, for example, a non-contact type coating machine, for example, a spiral coater, a curtain coater, a spray coater, a immersion coater, or the like, a contact coater, or the like. The coating device can apply the above-described blood slip imparting agent or a composition containing a blood slip imparting agent, or a coating liquid containing the same. As the coating apparatus, a non-contact type coating machine is preferable from the viewpoint that the droplet-shaped or particulate-shaped modifier can be uniformly dispersed in the entirety and the material is not damaged.

Further, the blood slip imparting agent or the composition containing the blood slip imparting agent or the coating liquid containing the same can be heated at room temperature in the original state of the liquid or in order to lower the viscosity, and is solid at room temperature. It was heated to liquefy and coated from a HM (Hot Melt Adhesive) spray gun. By increasing the air pressure of the control joint HMA spray gun, it is possible to apply a fine particle-shaped blood slip imparting agent or a composition containing a blood slip imparting agent.

Further, the coating amount of the blood reforming agent or the composition containing the blood slip imparting agent can be adjusted, for example, by controlling the amount of coating of the control seam HMA spray gun.

The above-mentioned liquid permeable top sheet can be used in the technical field as long as it satisfies the above requirements, and is not particularly limited. For example, a sheet-like material having a liquid-permeable structure, for example, a film or a woven fabric , not weaving, etc. Examples of the fibers constituting the woven fabric and the non-woven fabric include natural fibers and chemical fibers. Examples of the natural fibers include cellulose such as fluff pulp and cotton. Examples of the chemical fibers include rayon and small fiber artificial. Semi-synthetic cellulose such as regenerated cellulose, acetate, or triacetate such as silk, thermoplastic hydrophobic chemical fiber, and thermoplastic thermoplastic chemical fiber subjected to hydrophilization treatment.

Examples of the thermoplastic hydrophobic chemical fiber include a single fiber such as polyethylene (PE), polypropylene (PP), or polyethylene terephthalate (PET), and a graft polymer of PE and PP. The fibers that make up.

Examples of the nonwoven fabric include a breathable nonwoven fabric, a spunbonded nonwoven fabric, a point bonded nonwoven fabric, a water flow non-woven fabric, a needle-punched nonwoven fabric, a melt blown nonwoven fabric, and the like (for example, SMS or the like).

The liquid-impermeable back sheet may be a resin film containing a film having a film such as PE or PP, a resin film having air permeability, a nonwoven fabric such as a spun bond or a water flow, or the like, and a resin film or the like. The layer is not woven, etc. In view of the flexibility of the absorbent article, for example, a low density polyethylene (LDPE) film having a basis weight of from about 15 to about 30 g/m ² is preferred.

An absorbent article according to an embodiment of the present invention comprises a second sheet between a liquid permeable top sheet and an absorbent body. The second sheet may be exemplified by the same example as the liquid permeable top sheet.

As a first example of the above-mentioned absorber, for example, the absorbent core is covered with a core covering material.

Examples of the constituent elements of the absorbent core include hydrophilic fibers such as fluff pulp, cotton such as cotton, rayon, and rayon rayon, such as regenerated cellulose, acetate, and triacetate. Synthetic cellulose, particulate polymer, fibrous polymer, thermoplastic hydrophobic chemical fiber, and hydrophilized hydrophobic thermoplastic fiber treated with hydrophilization, and combinations thereof. Further, as a constituent element of the above-mentioned absorbent core, a superabsorbent polymer may, for example, be a granular material such as a sodium acrylate copolymer.

The core coating material is not particularly limited as long as it is liquid-permeable and has a barrier property that the polymer absorber does not permeate, and is, for example, a woven fabric or a nonwoven fabric. Examples of the woven fabric and the nonwoven fabric include natural fibers, chemical fibers, and paper towels.

The second example of the absorbent body is, for example, an absorbent sheet or a polymer sheet, and the thickness thereof is preferably from about 0.3 to about 5.0 mm. The absorbent sheet and the polymer sheet are generally used as long as they are used for absorbent articles such as sanitary napkins, and are not particularly limited.

As the side sheet, for example, liquid permeability is exemplified. The top sheet is the same.

The side flaps may be formed of a side sheet and a liquid impermeable back sheet, and may have a reinforcing sheet as desired, for example, having paper therebetween.

Further, when the liquid permeable top sheet is formed of a non-woven fabric or a woven fabric, the blood slip imparting agent or the composition containing the blood slip imparting agent is preferably a gap between fibers not blocking the nonwoven fabric or the woven fabric. The blood slip imparting agent or the composition containing the blood slip imparting agent may be attached to the surface of the fiber, for example, in the form of droplets or particles on the surface of the fiber of the nonwoven fabric or the woven fabric.

On the other hand, when the liquid permeable top sheet is formed of a hole film, the blood slip imparting agent or the composition containing the blood slip imparting agent is preferably an opening which does not block the film of the hole, and the above-mentioned blood slip property is preferable. The imparting agent or the composition containing the blood slip imparting agent may, for example, be attached to the surface of the film by droplets or particles on the surface of the pore film or without blocking the opening. This is because if the blood slip imparting agent or the composition containing the blood slip imparting agent blocks the opening of the pore film, the migration of the absorbed liquid to the absorber is prevented.

Further, the blood slip property-imparting agent or the composition containing the blood-slipness-imparting agent has a large surface area for slipping off with the absorbed menstrual blood, and is a blood-slipness-imparting agent or a blood-containing substance which is present in the form of droplets or particles. The composition of the slip imparting agent is preferably small in particle diameter.

A material coated with a blood slip imparting agent or a composition containing a blood slip imparting agent, for example, the top sheet is formed of a synthetic resin When it is not woven or woven, a film of a hole, or the like, these are preferably hydrophilized. The hydrophilization treatment may be, for example, a method in which a hydrophilic agent is coated on a surface of a fiber of a nonwoven fabric or a woven fabric, or a surface of a pore film, and a synthetic resin in which a hydrophilic agent is mixed with a raw material such as a nonwoven fabric, a woven fabric, or a pore film. .

The material before the application of the blood slip imparting agent or the composition containing the blood slip imparting agent is hydrophilic, on the top sheet, the lipophilic region derived from the blood slip imparting agent, and the hydrophilic region derived from the hydrophilic agent The mixture is sparsely coherent, and the blood slip imparting agent or the composition containing the blood slip imparting agent exhibits a sliding property, and the menstrual blood is easily transferred to the absorbent body.

The blood slip imparting agent or the composition containing the blood slip imparting agent also has a function as a lubricant. Therefore, when the top sheet is a non-woven fabric or a woven fabric, the blood slip imparting agent or the composition containing the blood slip imparting agent reduces the mutual friction of the fibers and enhances the softness. Further, when the top sheet is a resin film, the blood slip imparting agent or the composition containing the blood slip imparting agent reduces the friction between the top sheet and the skin.

The absorbent article according to a preferred embodiment of the present invention is intended to absorb blood, for example, a sanitary napkin, a panty liner, or the like.

Further, the absorbent article of the present invention is different from the absorbent article containing a well-known skin care composition, an emulsion composition, and the like, and does not require a component such as a softening agent or an immobilizing agent, and the absorbent article according to an embodiment of the present invention It does not contain a softener and/or an immobilizing agent.

[Examples]

Hereinafter, the present invention will be described by way of examples, but the present invention is not limited to these examples.

[example 1]

The top sheet No. 1-1 having a ridge structure was prepared in accordance with the method described in JP-A-2008-2034. After measuring with a high-precision two-dimensional laser displacement meter LJ-G030 and an electron microscope, the top sheet No. 1-1 has a ridge height H of 1049 μm and a width of 1/2 of a ridge of about 1577 μm, and is in the groove portion. An opening portion having an opening ratio of about 15% is formed.

The top sheet No. 1-1 was heat-treated to change its height, and the top sheets No. 1-2 to No. 1-4 in which the height H and the 1/2 width of the ridges were changed were prepared. The height H of the ridge portion of the top sheet No. 1-2 to No. 1-4 and the width W of the 1/2 portion of the ridge portion are shown in Table 2 below.

The top sheets No. 1-1 to No. 1-4 were respectively measured by a high-precision two-dimensional laser displacement meter LJ-G030 and an electron microscope, and the height H of the ridge and the 1/2 width of the ridge were measured. Find the angle θ.

Next, on the top sheets No. 1-1 to No. 1-4, Panacet 810s (manufactured by Nippon Oil Co., Ltd.) was applied to the contact surface of the top sheet with a control joint HMA spray gun to make the basis weight about 10 g. /m ² , Prepare the top sheets No. 1-5 to No. 1-8, respectively.

As a sanitary napkin, it is prepared by Unicharm Co., Ltd., Sufi Hadaomoi (available for many days ~ normal, no wings, 21cm), from which the top sheet is taken out, and the top sheet is taken out. On the Phillips sanitary napkin, the above top sheet (No. 1-1 to No. 1-8, the mass has been measured) was placed, and the sanitary napkin No. 1-1 to 1-8 was prepared.

For the physiological sanitary napkins of this type, the top sheet moving speed (T/S moving speed), the moving body migration speed, and the top sheet menstrual blood residual amount (T/S menstrual blood residual amount) were evaluated.

[experiment method]

On the top sheet, place an acrylic plate with a hole (200 mm × 100 mm, 125 g, and a hole of 40 mm × 10 mm in the center). From the above hole, use a pipette to place 4.0 g of 37 ± 1 ° C horse EDTA. Blood (in the blood of the horse, in order to prevent coagulation, ethylene diaminetetraacetic acid (hereinafter referred to as "EDTA")) (first time) is added.

The measurement was started while dropping the horse EDTA blood, and the time "top sheet moving speed" (first time) from the start of the dropping of the horse EDTA blood to the top sheet was measured. The above T/S transition speed means the time from the drop of the horse EDTA blood from the hole of the acrylic plate to the disappearance of the free horse EDTA blood in the hole of the acrylic plate.

Next, the "absorbent migration speed" (first time) of the time when the horse EDTA blood was dropped from the time of dropping to the time of migration to the absorbent body was measured. The above-mentioned absorption speed of the absorbent body means that the blood of the horse EDTA is dripped from the hole of the acrylic plate, and the free EDTA blood disappears in the hole of the acrylic plate, and the surface of the top sheet and the red color of the horse EDTA blood are invisible. The time until then.

3 minutes after the first drip, 4.0g of 37±1°C horse EDTA blood was used from the hole of the acrylic plate using a pipette (2nd) In the same manner, the T/S transition speed (second time) and the absorber migration speed (second time) were measured.

Three minutes after the second drip, the top sheet was taken out, the mass was measured, and the amount of residual blood in the top sheet was measured from the difference from the mass before the test.

The above test was repeated 10 times, using the average. The results are shown in Table 2.

As can be seen from Table 2, physiological cotton No. 1-7 and No. 1-8, in two experiments, the migration to the top sheet, and the migration to the absorbent body, and the EDTA blood to the top sheet The residual amount is small.

[Example 2] [Evaluation of Rewetting Rate and Absorbing Body Migration Speed]

A commercially available sanitary napkin (not coated with a blood slip imparting agent) having a shape as shown in Fig. 1 was prepared. The sanitary tampon is shown as follows: a top sheet formed of a permeable woven fabric treated with a hydrophilic agent (composite fiber composed of polyester and polyethylene terephthalate, basis weight: 35 g/m ² ) And a second sheet formed of a gas permeable non-woven fabric (composite fiber made of polyester and polyethylene terephthalate, basis weight: 30 g/m ² ), and wood pulp (basis weight: 150-450 g/ m ² , the closer to the central portion, the acrylic high-absorbent polymer (basis weight: 15 g/m ² ), and the absorbent body of the tissue as the core coating material, and the side sheet treated with the water repellent agent, The rear sheet is formed with a polyethylene film.

Hereinafter, the blood slip property imparting agent used in the experiment will be listed.

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

Pentaerythritol tetraethyl 2-hexanoate, weight average molecular weight: about 640

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

Mixture of tetrakis-2-ethylhexanoic acid pentaerythritol and di-2-ethylhexanoic acid neopentyl glycol (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 BASF Japan

The fatty acid is oleic acid or stearic acid, which is a triglyceride of glycerol and fatty 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) are contained in a mass ratio of 0.2:11:88:0.8, glycerol and fatty acid Ester, weight average molecular weight: 880

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

Fatty acid of C ₈ : fatty acid of C ₁₀ : fatty acid of C ₁₂ containing triglyceride of glycerol and fatty acid in a weight ratio of 37:7:56, 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 glycerol and fatty acid triester in a weight ratio of 44:56, weight average molecular weight: about 570

. Panacet810s, manufactured by Nippon Oil Co., Ltd.

Fatty acid of C ₈ : C ₁₀ fatty acid containing triglyceride of glycerol and fatty acid in a weight ratio of 85:15, weight average molecular weight: about 480

. Panacet800, manufactured by Nippon Oil Co., Ltd.

The fatty acids are all octanoic acid (C ₈ ) glycerol and fatty acid triester, weight average molecular weight: about 470

. Panacet800B, manufactured by Nippon Oil Co., Ltd.

The fatty acids are all 2-ethylhexanoic acid (C ₈ ) glycerol and fatty acid triester, weight average molecular weight: about 470

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

C ₁₆ fatty acid: C ₁₈ fatty acid: C ₂₀ fatty acid (including both saturated fatty acids and unsaturated fatty acids) is a triglyceride containing glycerol and fatty acid in a weight ratio of about 5:92:3, 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) are about 4:8:60:25:3 by weight Than the glycerol and fatty acid triester, weight average molecular weight: 670

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

Fatty acid is a diester of glycerin 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] . Unister H-208BRS, manufactured by Nippon Oil Co., Ltd.

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

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

Butanediol dodecanoic acid (C ₁₂ ) monoester, weight average molecular weight: about 270

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

Butyl diol octadecanoic acid (C ₁₈ ) monoester, weight average molecular weight: about 350

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

Weight average molecular weight: about 400

. Tributyl citrate, manufactured by Tokyo Chemical Industry Co., Ltd.

Weight average molecular weight: about 360

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

Weight average molecular weight: about 380

[(d ₃ ) ester of fatty acid with aliphatic monovalent alcohol] . ELECTOLWE20, manufactured by Nippon Oil Co., Ltd.

Dodecanoic acid (C ₁₂ ), ester with dodecyl alcohol (C ₁₂ ), weight average molecular weight: about 360

. ELECTOLWE40, manufactured by Nippon Oil Co., Ltd.

Ammonic acid (C ₁₄ ), ester with dodecyl alcohol (C ₁₂ ), weight average molecular weight: about 390

[(e ₁ ) polyoxy C ₃ ~ C ₆ alkylene glycol] . uniolPB500, made by Nippon Oil Co., Ltd.

Polytetramethylene glycol, weight average molecular weight: about 500

. uniolPB700, manufactured by Nippon Oil Co., Ltd.

Polyoxybutylene polyoxypropylene glycol, weight average molecular weight: about 700

[(f ₁ )chain alkane] . Parleam6, manufactured by Nippon Oil Co., Ltd.

By branching a mixture of isoparaffin, isobutylene and n-butene, followed by addition of a hydrogen atom to form a branched chain hydrocarbon, the degree of polymerization is from about 5 to about 10, and the weight average molecular weight is about 330.

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

A glycerol and a fatty acid triester having a hydrogen atom added to the NA36 and a ratio of a double bond derived from an 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 citric 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 dodecanoic acid monoglyceride, manufactured by BASF Japan . Isopropyl citrate, manufactured by Tokyo Chemical Industry Co., Ltd.

Weight average molecular weight: about 230

. Diisostearate

Weight average molecular weight: about 640

. uniolPB1000R, made by Nippon Oil Co., Ltd.

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

. uniolD-250, manufactured by Nippon Oil Co., Ltd.

Polypropylene glycol, weight average molecular weight: about 250

. uniolD-400, manufactured by Nippon Oil Co., Ltd.

Polypropylene glycol, weight average molecular weight: about 400

. uniolD-700, manufactured by Nippon Oil Co., Ltd.

Polypropylene glycol, weight average molecular weight: about 700

. uniolD-1000, made by Nippon Oil Co., Ltd.

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

. uniolD-1200, manufactured by Nippon Oil Co., Ltd.

Polypropylene glycol, weight average molecular weight: about 1,160

. uniolD-2000, made by Nippon Oil Co., Ltd.

Polypropylene glycol, weight average molecular weight: about 2,030

. uniolD-3000, made by Nippon Oil Co., Ltd.

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

. uniolD-4000, manufactured by Nippon Oil Co., Ltd.

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

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

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

. WilBridecp9, made by Nippon Oil Co., Ltd.

The OH group at both ends of the polytetramethylene glycol is a compound esterified with hexadecanoic acid (C ₁₆ ), and the weight average molecular weight is about 1,150.

. unilubMS-70K, manufactured by Nippon Oil Co., Ltd.

The stearyl ether of polypropylene glycol is about 15 repeating units, and the weight average molecular weight is about 1,140.

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

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

. unilub5TP-300KB

In the pentaerythritol 1 molar, polyoxyethylene polyoxypropylene pentabutanol ether formed by adding ethylene oxide 5 moles and propylene oxide 65 moles, weight average molecular weight: 4,130

. WilBrides 753, 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, about 6 repeating units, weight average Sub-quantity: 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

. 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

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

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

. UnioxHC60, manufactured by Nippon Oil Co., Ltd.

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

. Vaseline, made by BASF Japan Co., Ltd.

Hydrocarbon from petroleum, semi-solid phase

The dynamic viscosity, water retention ratio, weight average molecular weight, IOB and melting point of the above samples are shown in Table 3 below.

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

The blood slip property-imparting agent is applied to almost the entire skin contact surface of the top sheet of the sanitary napkin. When the blood slip property imparting agent is in a state of being in a liquid state at room temperature, or when the blood slip property imparting agent is in a solid state at room temperature, it is heated to a temperature of a melting point of +20 ° C, and then a control joint HMA is used. In the spray gun, each blood slip property imparting agent was atomized, and the top sheet contacted the skin surface, and each blood slip property imparting agent was applied until the basis weight became about 5 g/m ² .

Fig. 4 is an electron micrograph of the skin contact surface of the top sheet in the sanitary napkin (No. 2-5) of the top sheet containing the three C2L oil fatty acid glycerides. As is apparent from Fig. 4, the tri-C2L oil fatty acid glyceride is present in the form of fine particles on the surface of the fiber.

[experiment method]

On the top sheet containing each blood slip imparting agent, an acrylic plate (200 mm × 100 mm, 125 g, a hole of 40 mm × 10 mm in the center) with a hole was placed, and a suction tube was used from the above hole, 37 EDTA blood of ±1 °C (in the blood of horses, in order to prevent coagulation, 3.0 g of ethylenediaminetetraacetic acid (hereinafter also referred to as "EDTA")) was added (first time), and after 1 minute, 37 ± 3.0 g of horse EDTA blood at 1 ° C was dropped from the pores of the acrylic plate and again with a pipette (second time).

After the second blood drop, the acrylic plate was taken out directly, and 10 pieces of filter paper (Advantech Toyo Co., Ltd. qualitative filter paper No. 2, 50 mm × 35 mm) were placed at the place where the blood was dropped (the total mass of 10 pieces of filter paper) : FW ₀ (g)), from above, the scale was placed so that the pressure became 30 g/cm ² . After 1 minute, the filter paper was taken out, and the total mass FW ₁ (g) of 10 pieces of filter paper after the test was measured, and the "re-humidification rate" was calculated according to the following formula.

Rewetting rate (% by mass) = 100 × [FW ₁ (g) - FW ₀ (g)] / 6.0 (g)

Further, in addition to the evaluation of the rewet rate, after the second blood drop, the time "absorbent migration speed" at which the blood migrated from the top sheet to the absorber was measured. The above-described absorption speed of the absorbent body means the time from when the blood is introduced into the top sheet to the surface and inside of the top sheet, and the red color of the blood disappears.

The results of the rewetting rate and the speed of migration of the absorbent body are shown in Table 3 below.

Further, the whiteness of the contact sheet of the top sheet (T/S) after the test of the speed of the absorbent body was visually evaluated based on the following criteria.

◎: The red color of the blood hardly remains, and there is no difference between the place where the blood exists and the place where it does not exist.

○: Although the red color of the blood remains, it is difficult to distinguish where the blood exists and where it does not exist.

△: The red color of the blood remains, but the blood is obvious.

×: The red color of the blood remains in place

Further, the adhesion of the top sheet to the skin surface was measured at 35 ° C according to the following criteria.

○: no stickiness

△: Some stickiness

×: Viscous

The results are combined and shown in Table 3 below.

Although there is no blood slip property imparting agent, the rewetting rate is 22.7%, and the absorption speed of the absorber exceeds 60 seconds, but since the glycerin and the fatty acid triester have a rewetting rate of 7.0% or less, and the absorption speed of the absorbent body is It is 8 seconds or less, so the absorption performance is greatly improved.

Similarly, the blood slip property imparting agent having a dynamic viscosity of about 0.01 to 80 mm ² /s at 40 ° C, a water absorbing ratio of about 0.01 to about 4.0% by mass, and a weight average molecular weight of less than about 1,000 is absorbed. The performance has been greatly improved.

Then, after the medicinal cotton of No. 2-1 to 2-51 was used by the volunteers, the answer was: Physiology of the blood-slipness-imparting agent containing No. 2-1 to 2-23. With sanitary napkins, even after absorbing menstrual blood, there is no stickiness on the top sheet, and the top sheet has a dry feel.

Further, the physiological sanitary napkin containing the blood slip property imparting agents of No. 2-11, 13, 16, 18 to 20, and 23 was obtained as follows: after absorbing menstrual blood, the top sheet contacted the skin surface without being affected by blood. Reddish and less unpleasant.

[Example 3] [Residual rate of menstrual blood in the top sheet with a ridge structure]

The surface residual rate of menstrual blood in the top sheet having the ridge structure was evaluated.

Prepare a top sheet formed from a hydrophilic agent-treated breathable nonwoven fabric (composite fiber made of polyester and polyethylene terephthalate, basis weight: 35 g/m ² ), and a non-woven fabric (by polyester) And polyethylene terephthalate composite fiber, basis weight: 30g / m ² ) formed by the second sheet, and containing wood pulp (basis weight: 150 ~ 450g / m ² , the closer to the central part Many), an acrylic-based superabsorbent polymer (basis weight: 15 g/m ² ), and an absorbent body of a thin paper as a core coating material, a side sheet treated with a water repellent agent, and a polyethylene film After the sheet.

The top sheet is a top sheet having a ridge groove structure manufactured according to the method described in JP-A-2008-2034, the thickness of the ridge portion is about 1.5 mm, and the thickness of the groove portion is about 0.4 mm, and the distance between the ridge grooves is (ridge). The width of the portion + the width of the groove portion is about 4 mm, and the groove portion has an opening portion having an opening ratio of about 15%.

As a blood slip imparting agent, Unister H-408BRS (manufactured by Nippon Oil Co., Ltd., pentaerythritol and tetraester of fatty acid) can be selected at room temperature by a controlled seam HMA spray gun to contact the skin surface of the top sheet (ridge On the groove surface, the coating was carried out at a basis weight of 5.0 g/m ² . After confirmation by an electron microscope, H-408BRS was attached to the surface of the fiber in the form of fine particles.

Next, the sanitary napkin No. 3-1 was formed by gradually overlapping the rear sheet, the absorbent body, the second sheet, and the top sheet having the ridge groove facing upward.

The blood slip property-imparting agent was changed from Unister H-408BRS to the one shown in the following Table 4 to produce sanitary napkins No. 3-2 to No. 3-40. Further, when the blood-slip property-imparting agent is liquid at room temperature, it is in the original state, and when the blood-slipness-imparting agent is solid at room temperature, it is heated to a temperature of +20 ° C, and then a control joint HMA spray gun is used. The blood slip imparting agent was micronized, and applied to the skin contact surface of the top sheet to a basis weight of about 5 g/m ² .

Further, the blood-slip property-imparting agent is applied to almost the entire surface of the top sheet which is in contact with the skin, and both the ridge portion and the groove portion are coated.

[experiment method]

After measuring the quality of the top sheet: W ₂ (g) (the mass of the top sheet before the test), an acrylic sheet with holes was placed in the center portion of the longitudinal direction and the width direction of the absorbent article and above the top sheet (200 mm) ×100mm, 125g, 40mm × 10mm hole in the center), from the above hole, use a pipette to drip 4.0g of 37±1°C horse EDTA blood (in horse blood, in order to prevent condensation, there is ethylene diamine added) Acetic acid (hereinafter also referred to as "EDTA")).

After the horse EDTA blood was dropped, the above acrylic plate was directly taken out, and the top sheet was taken out, and the mass thereof was measured: W ₃ (g) (the mass of the top sheet after the test), and the "surface residual ratio (quality) was calculated according to the following formula %)".

Surface residual ratio (% by mass) = 100 × [W ₃ (g) - W ₂ (g)] / 4.0 (g)

The results are shown in Table 4 below.

In the sanitary napkin No. 3-40 which does not have a blood-slipness-imparting agent, although the surface residual ratio is 7.5% by mass, the sanitary napkin No. 3- in the dynamic range of the dynamic viscosity and the water holding ratio is within a specific range. In 1 to No. 3-16, the surface residual ratio is 2.5% by mass or less.

In the sanitary napkin No. 3-1 to No. 3-16, the horse EDTA blood dropped from the ridge of the top sheet slipped from the ridge to the groove portion, and the state in which it was quickly absorbed from the groove portion into the inside of the absorbent body was observed. On the other hand, does not have In the sanitary napkin No. 3-40 of the blood slip imparting agent, the dropped horse EDTA blood does not slide down to the groove portion, and gradually falls on the groove portion, and remains on the ridge portion of the top sheet. Further, in the absorbent article having a high water holding ratio, for example, in No. 3-25, the horse EDTA blood dropped from the ridge of the top sheet does not slip to the groove portion, and a part remains on the top sheet and slowly falls, and a part thereof Remains on the ridge.

In order to confirm the action of the blood slip imparting agent, the following experiment was carried out.

[Example 4] [Blood viscosity containing blood slip imparting agent]

The blood viscosity of the blood slip imparting agent was measured using a Rheometric Expansion System ARES (Rheometric Scientific, Inc). To the horse's fiber, 2% by mass of Panacet 810s was added, and the sample was gently stirred to form a sample, and the sample was placed on a parallel plate having a diameter of 50 mm to form a pore of 100 μm, and the viscosity was measured at 37 ± 0.5 °C. Since it is a parallel plate, the sample does not require a uniform shear velocity, but the average shear velocity expressed on the machine is 10 s ^-1 .

The viscosity of the horse-defibrinated blood containing 2% by mass of Panacet 810s is 5.9 mPa. s, on the other hand, the viscosity of the horse hair fiber without the blood slip imparting agent is 50.4 mPa. s. Therefore, the horse defibrinated blood containing 2% by mass of Panacet 810s can reduce the viscosity by about 90% as compared with the case where the blood slip imparting agent is not contained.

Although blood is known to contain blood cells and other components, and has thixotropic The nature of the sex, but the blood slip imparting agent of the present invention has a low viscosity domain and has a function of lowering the blood viscosity of menstrual blood or the like. By lowering the viscosity of the blood, the absorbed menstrual blood easily migrates from the top sheet to the absorber.

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

The menstrual blood of the healthy volunteers was applied to a preservative film for food protection, and Panacet 810s dispersed in 10 times by mass of phosphate buffered physiological saline was added to a part thereof until the concentration of Panacet 810s became 1% by mass. The menstrual blood was placed on a glass slide, covered with a cover glass, and the state of the red blood cells was observed under an optical microscope. The photomicrograph of the menstrual blood containing no blood slip imparting agent is shown in Fig. 5(a), and the photomicrograph of the menstrual blood containing Panacet 810s is shown in Fig. 5(b).

As is clear from Fig. 5, although the menstrual blood containing the blood slip imparting agent is not contained, the red blood cells form agglomerates such as a chain shape, but the menstrual blood containing Panacet 810s is stably dispersed in the red blood cells. Therefore, the blood slip imparting agent has an effect of stabilizing the red blood cells in the blood.

[Example 6] [The surface tension of blood containing a blood slip imparting agent]

The blood surface tension including the blood slip imparting agent was measured by a drape drop method using a contact angle meter Drop Master 500 manufactured by Kyowa Interface Science Co., Ltd. The surface tension is determined by adding a specific amount of a blood slip property-imparting agent to the defibrinated blood of the sheep, and sufficiently measuring the vibration.

The measurement is performed automatically by the machine, and the surface tension γ is obtained by the following equation (see Fig. 6).

γ =g× ρ ×(de) ² ×1/H

g: gravity coefficient

1/H: Correction term determined by ds/de

ρ: density

De: maximum diameter

Ds: diameter from the position where the drop end is only de rising

The density ρ is based on the vibration density test method of the "density test method and density, mass and capacity conversion table" of JIS K 2249-1995, and is measured at the temperatures shown in Table 5 below.

In the measurement, DA-505 of Kyoto Electronics Industry Co., Ltd. was used.

The results are shown in Table 5 below.

As can be seen from Table 5, the blood slip imparting agent has a blood lowering The role of surface tension.

By lowering the surface tension of the blood, the absorbed blood does not stay between the fibers of the top sheet and will rapidly migrate into the absorbent body.

The present invention relates to the following J1 to J10.

[J1]

An absorbent article comprising: a liquid permeable top sheet, a liquid impermeable back sheet, and an absorbent article between the top sheet and the back sheet, wherein the liquid is permeable The top sheet has a plurality of protrusions in the discharge port contact area, the protrusion has an angle of 36 to 80° with respect to the plane direction of the absorbent article, and the liquid permeable top sheet is at the drain At least the above-mentioned protruding portion of the contact region has a region of a blood slip imparting agent, and the region of the blood slip imparting agent includes a dynamic viscosity of 0.01 to 80 mm ² /s at 40 ° C, and a holding of 0.01 to 4.0% by mass. A water-slip imparting agent having a water rate and a weight average molecular weight of less than 1,000.

[J2]

An absorbent article according to J1, wherein the blood slip imparting agent further has an IOB of 0.00 to 0.60.

[J3]

An absorbent article according to J1 or J2, wherein said top sheet has a thickness of 0.2 to 15.0 mm at the top of the projection.

[J4]

In the above-mentioned top sheet, the above-mentioned top sheet has the above-mentioned blood slip property imparting agent having a basis weight of 1 to 30 g/m ^{2 in} the region containing the blood slip property imparting agent.

[J5]

An absorbent article according to any one of J1 to J4, wherein the plurality of ridges are plural ridges.

[J6]

The absorbent article according to any one of the above items, wherein the blood slip imparting agent is a group consisting of (i) to (iii) and any combination of the following, (i) a hydrocarbon, ( Ii) a carbonyl group (-CO-) and an oxy group (-O) having (ii-1) a hydrocarbon moiety, the same or different from (ii-2) one or more of the CC single bonds inserted into the hydrocarbon moiety -) the compound of the group consisting of, and (iii) the choice between the CC single bond having the (iii-1) hydrocarbon moiety, the same or different from (iii-2) one or more of the hydrocarbon moiety inserted into the hydrocarbon moiety a group selected from the group consisting of a carbonyl group (-CO-) and an oxy group (-O-), which is the same as or different from (iii-3) one or a plurality of hydrogen atoms selected from the above hydrocarbon moiety; a compound of a group consisting of (-COOH) and a hydroxyl group (-OH), wherein two or more of the compounds of (ii) or (iii) are inserted. In the case of an oxy group, each oxy group is not adjacent.

[J7]

The absorbent article according to any one of J1 to J6, wherein the blood slip imparting agent is a group consisting of (i') to (iii') and any combination of the following, (i') hydrocarbon And (ii') a carbonyl bond (-CO-) having a (ii'-1) hydrocarbon moiety, which is the same or different from (ii'-2) one or more of the CC single bonds inserted into the hydrocarbon moiety. a compound bonded to a group consisting of an ester bond (-COO-), a carbonate bond (-OCOO-), and an ether bond (-O-), and (iii') has (iii'- 1) a hydrocarbon moiety, which is the same as or different from (iii'-2) one or more of the CC single bonds inserted into the hydrocarbon moiety selected from the group consisting of a carbonyl bond (-CO-) and an ester bond (-COO-) a bond of a group consisting of a carbonate bond (-OCOO-) and an ether bond (-O-), and a hydrogen of the same or different ones as the (iii'-3) one or more plural a compound in which the atom is selected from the group consisting of a carboxyl group (-COOH) and a hydroxyl group (-OH), wherein two or more identical or different bonds are inserted into the compound of (ii') or (iii'). At the time of knotting, the bonds are not adjacent.

[J8]

The absorbent article according to any one of J1 to J7, wherein the blood slip imparting agent is an ester of (A) to (F), (A) (A1) and (A2), wherein (A1) has a chain hydrocarbon portion, a compound having 2 to 4 hydroxyl groups substituted for a hydrogen atom of the above chain hydrocarbon portion, and (A2) a compound having a chain hydrocarbon portion and a carboxyl group replacing a hydrogen atom of the chain hydrocarbon portion (B) (B1) and (B2) an ether, wherein (B1) is a compound having a chain hydrocarbon moiety and 2 to 4 hydroxyl groups which replace a hydrogen atom of the above chain hydrocarbon moiety, and (B2) has a chain a hydrocarbon-like moiety, a compound substituted with one hydroxyl group of a hydrogen atom of the above-mentioned chain hydrocarbon moiety, (C) an ester of (C1) and (C2), wherein (C1) is a chain hydrocarbon-containing moiety and a substituted chain a carboxylic acid, a hydroxy acid, an alkoxy acid or an oxo acid of 2 to 4 carboxyl groups of a hydrogen atom of a hydrocarbon moiety, (C2) being a hydroxyl group having a chain hydrocarbon moiety and a hydrogen atom replacing the above chain hydrocarbon moiety a compound having (D) having a chain hydrocarbon moiety and an ether bond (-O-), a carbonyl bond (-CO-), and an ester bond (- between the CC single bond inserted into the chain hydrocarbon moiety) COO-), and carbonate bond (-OCOO-) Any of a group bonded to the compound, (E) polyoxy C ₃ ~ C ₆ alkylene glycol, or alkyl ester or alkyl ether, and (F) a chain hydrocarbon, and the selected such A group consisting of any combination.

[J9]

The absorbent article of any one of J1 ~ J8, the slipperiness of the blood wherein imparting agent (a ₁₎ tetrahydric alcohol chain hydrocarbon with at least one of the fatty acid ester is selected from, (a ₂₎ a chain hydrocarbon three yuan An ester of an alcohol with at least one fatty acid, an ester of (a ₃ ) a chain hydrocarbon diol with at least one fatty acid, (b ₁ ) a chain hydrocarbon tetraol, and an ether of at least one aliphatic monovalent alcohol, ( b ₂ ) an ether of a chain hydrocarbon triol and at least one aliphatic monovalent alcohol, (b ₃ ) a chain hydrocarbon diol and at least one ether of an aliphatic monovalent alcohol, and (c ₁ ) having 4 a chain hydrocarbon tetracarboxylic acid of a carboxyl group, a hydroxy acid, an alkoxy acid or an oxo acid, an ester with at least one aliphatic monovalent alcohol, (c ₂ ) a chain hydrocarbon tricarboxylic acid having three carboxyl groups, a hydroxy acid And an alkoxylic acid or an oxo acid, an ester with at least one aliphatic monovalent alcohol, (c ₃ ) a chain hydrocarbon dicarboxylic acid having two carboxyl groups, a hydroxy acid, an alkoxy acid or an oxyacid, and at least An ester of an aliphatic monovalent alcohol, (d ₁ ) an aliphatic monovalent alcohol and an aliphatic monovalent alcohol ether, (d ₂ ) dialkyl ketone, (d ₃ ) fatty acid and an aliphatic monovalent alcohol ester , (d ₄₎ a dialkyl carbonate, (e ₁₎ polyoxy C ₃ ~ C ₆ alkylene glycol, (e ₂₎ polyoxy C ₃ ~ C ₆ alkylene glycol Of at least one fatty acid esters, (e ₃₎ polyoxy C ₃ ~ C ₆ alkylene glycol and at least one aliphatic ethers of monovalent alcohols, and (F ₁₎ alkane, and any combination of these The group formed.

[J10]

The absorbent article according to any one of the above items, wherein the top sheet is a group selected from the group consisting of a nonwoven fabric, a woven fabric, and a film of a hole, and the blood slip imparting agent is on the surface of the nonwoven fabric or the woven fabric, or The surface of the pore film is attached in the form of droplets or particles.

[J11]

An absorbent article according to any one of J1 to J10, which is a sanitary napkin or a panty liner.

1‧‧‧Absorbables

2‧‧‧Top sheet

3‧‧‧ absorber

4‧‧‧Flanking

5‧‧‧Side sheet

6, 6' ‧ ‧ embossing

7‧‧‧A zone containing a blood slip agent

Claims (13)

An absorbent article comprising a liquid permeable top sheet, a liquid impermeable back sheet, and an absorbent article of the absorbent body between the top sheet and the back sheet, characterized by the liquid permeable property The top sheet has a plurality of protrusions in the discharge port contact area, the protrusion has an angle of 38 to 60° with respect to the plane direction of the absorbent article, and the liquid permeable top sheet contacts at least the drain opening The region of the protruding portion of the region has a blood-slip imparting agent region containing a dynamic viscosity of 0.01 to 80 mm ² /s at 40 ° C and a water holding ratio of 0.01 to 4.0% by mass. A blood slip property imparting agent having a weight average molecular weight of less than 1,000. The absorbent article of claim 1, wherein the blood slip imparting agent further has an IOB (inorganic organic balance) of 0.00 to 0.60. The absorbent article of claim 1, wherein the top sheet has a thickness of 0.2 to 15.0 mm at the top of the projection. The absorbent article of claim 1, wherein the plurality of protrusions have a height of 0.1 mm or more and less than 15.0 mm, respectively. The absorbent article according to claim 1, wherein the blood slip imparting agent having a basis weight of 1 to 30 g/m ^{2 is} contained in the region containing the blood slip property imparting agent in the top sheet. The absorbent article of claim 1, wherein the top sheet has a plurality of ridges as the plurality of ridges and a plurality of ridges Do not be placed between adjacent two aforementioned ridges. The absorbent article of claim 1, wherein the aforementioned top sheet is composed of a non-woven fabric. The absorbent article according to any one of claims 1 to 7, wherein the blood slip imparting agent is a group selected from the group consisting of (i) to (iii) and any combination of the following, (i) a hydrocarbon And (ii) having a (ii-1) hydrocarbon moiety, which is the same or different from (ii-2) one or more of the CC single bonds inserted into the hydrocarbon moiety, selected from the group consisting of a carbonyl group (-CO-) and an oxy group ( -O-) a compound of the group consisting of, and (iii) having a (iii-1) hydrocarbon moiety, (iii-2) one or a plurality of the same or different intervening CC single bonds inserted into the hydrocarbon moiety a group selected from the group consisting of a carbonyl group (-CO-) and an oxy group (-O-), which is the same as or different from (iii-3) one or a plurality of hydrogen atoms substituted for the aforementioned hydrocarbon moiety, selected from a carboxyl group ( -COOH) and a compound of a group consisting of a hydroxyl group (-OH). 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 any one of claims 1 to 7, wherein the blood slip imparting agent is a group selected from the following (i') to (iii') and any combination thereof, (i') a hydrocarbon, (ii') having a (ii'-1) hydrocarbon moiety, which is the same or different from (ii'-2) one or more of a plurality of CC single bonds inserted into the hydrocarbon moiety, selected from a carbonyl group a compound of a bond formed by a bond (-CO-), an ester bond (-COO-), a carbonate bond (-OCOO-), and an ether bond (-O-), and (iii' a carbonyl bond (-CO-), ester bond having a (iii'-1) hydrocarbon moiety, (iii'-2) one or a plurality of identical or different CC single bonds inserted into the hydrocarbon moiety The bond of the group consisting of (-COO-), carbonate bond (-OCOO-), and ether bond (-O-), and (iii'-3) have one or plural identical or different a compound in which a hydrogen atom of the hydrocarbon moiety is selected from the group consisting of a carboxyl group (-COOH) and a hydroxyl group (-OH), and in the compound of (ii') or (iii'), two are inserted. When the above identical or different bonding is performed, the bonding is not adjacent. The absorbent article according to any one of claims 1 to 7, wherein the blood slip imparting agent is a group selected from the following (A) to (F) and any combination thereof, (A) (A1) And (A1) is a compound having a chain hydrocarbon moiety and 2 to 4 hydroxyl groups which replace a hydrogen atom of the chain hydrocarbon moiety, and (A2) has a chain hydrocarbon moiety and a substituted a compound of one carboxyl group of a hydrogen atom of a chain hydrocarbon moiety, (B) an ether of (B1) and (B2), wherein (B1) is a hydrogen atom having a chain hydrocarbon moiety and a part of the above-mentioned chain hydrocarbon moiety; a compound of ~4 hydroxyl groups, (B2) is a compound having a chain hydrocarbon moiety and a hydroxyl group substituted for a hydrogen atom of the aforementioned chain hydrocarbon moiety, (C) an ester of (C1) and (C2), wherein (C1) Is a carboxylic acid, a hydroxy acid, an alkoxy acid or an oxo acid containing a chain hydrocarbon moiety and a 2-4 carboxyl group which replaces the hydrogen atom of the aforementioned chain hydrocarbon moiety, and (C2) has a chain hydrocarbon moiety, and a compound which replaces one hydroxyl group of a hydrogen atom of the aforementioned chain hydrocarbon moiety, (D) has a chain hydrocarbon moiety, and is selected from an ether bond (-O-), a carbonyl group, and a CC single bond inserted into the chain hydrocarbon moiety. Bond (-CO-), ester Junction (-COO-), a carbonate bond and bonded to any group consisting of compounds of the knot (-OCOO-), (E) polyoxy C ₃ ~ C ₆ alkylene glycol, or an alkoxy a base or alkyl ether, and (F) a chain hydrocarbon. The absorbent article according to any one of claims 1 to 7, wherein the blood slip imparting agent is an ester selected from the group consisting of (a ₁ ) chain hydrocarbon tetraol and at least one fatty acid, (a ₂ ) chain hydrocarbon An ester of a triol with at least one fatty acid, an ester of (a ₃ ) a chain hydrocarbon diol with at least one fatty acid, (b ₁ ) a chain hydrocarbon tetraol and an ether of at least one aliphatic monovalent alcohol (b ₂ ) an ether of a chain hydrocarbon triol with at least one aliphatic monovalent alcohol, (b ₃ ) a chain hydrocarbon diol and an ether of at least one aliphatic monovalent alcohol, (c ₁ ) a chain of four carboxyl-chain hydrocarbon tetracarboxylic acids, a hydroxy acid, an alkoxy acid or an oxo acid, and an ester of at least one aliphatic monovalent alcohol, (c ₂ ) a chain hydrocarbon tricarboxylic acid having three carboxyl groups, a hydroxy acid, an alkoxy acid or an oxo acid, an ester with at least one aliphatic monovalent alcohol, (c ₃ ) a chain hydrocarbon dicarboxylic acid having two carboxyl groups, a hydroxy acid, an alkoxy acid or an oxo acid, An ester with at least one aliphatic monovalent alcohol, (d ₁ ) an aliphatic monovalent alcohol and an aliphatic monovalent alcohol ether, (d ₂ ) dialkyl ketone, (d ₃ ) fatty acid and an aliphatic monovalent alcohol Ester, (d ₄ ) dialkyl carbonate, (e ₁ ) polyoxy C ₃ ~ C ₆ alkylene glycol, (e ₂ ) polyoxy C ₃ ~ C ₆ alkyl An ester of a diol with at least one fatty acid, (e ₃ ) a polyoxy C ₃ -C ₆ alkylene glycol and an ether of at least one aliphatic monovalent alcohol, and (f ₁ ) a chain alkane, and such A group consisting of any combination. The absorbent article according to any one of claims 1 to 7, wherein the top sheet is a group selected from the group consisting of a nonwoven fabric, a woven fabric, and a pore film, and the blood slip imparting agent is attached in a droplet shape or a particle shape. The surface of the fiber of the aforementioned non-woven fabric or woven fabric, or the surface of the aforementioned aperture film. The absorbent article according to any one of claims 1 to 7, which is a sanitary napkin or a panty liner.