CN113727689A

CN113727689A - Absorbent article, cleansing sheet, and use of wiping performance improving agent

Info

Publication number: CN113727689A
Application number: CN202080030998.3A
Authority: CN
Inventors: 中下将志; 山口正史
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2019-04-26
Filing date: 2020-02-20
Publication date: 2021-11-30
Anticipated expiration: 2040-02-20
Also published as: JP2020182543A; WO2020217680A1; CN113727689B; JP7101636B2

Abstract

An object of the present disclosure is to provide an absorbent article having excellent wiping properties of a highly viscous body fluid adhering to the skin. The absorbent article of the present disclosure has the following technical features. An absorbent article comprising a liquid-permeable sheet, a liquid-impermeable sheet, and an absorbent body therebetween, the absorbent article comprising: a wiping property improving agent for improving wiping property of body fluid, or a wiping property improving composition containing the wiping property improving agent, wherein the wiping property improving agent has an IOB of 0.6 to 3.0, a surface tension of 39 to 60mN/m (25 ℃), a PET plate contact angle of 30 to 65 ° (25 ℃), a water contact angle of 0 to 30 ° (25 ℃), and a water contact angle of 90 to 500mm²Movement in/s (40 ℃ C.)Viscosity.

Description

Absorbent article, cleansing sheet, and use of wiping performance improving agent

Technical Field

The present disclosure relates to an absorbent article containing a wiping property improving agent, a cleaning sheet containing a wiping property improving agent, and use of a wiping property improving agent for a fibrous product for improving wiping property of body fluid.

Background

Absorbent articles comprising lotion compositions that inhibit the attachment of body fluids to the skin are known.

For example, patent documents 1 and 2 disclose an absorbent article intended to be worn by a wearer, in which at least a part of the body-facing surface of the article contains a lotion composition containing at least one 1 st compound that is liquid at 25 ℃ and at least one 2 nd compound that is solid at 25 ℃,

the 1 st compound is a liquid polyethylene glycol derivative or a liquid polypropylene glycol or a derivative thereof, and the 2 nd compound is a solid polyethylene glycol derivative or a solid polypropylene glycol or a derivative thereof, or

The 1 st compound is liquid polyethylene glycol or a derivative thereof, or liquid polypropylene glycol or a derivative thereof, and the 2 nd compound is a solid nonionic surfactant having an HLB value of at least 10, or

The aforementioned 1 st compound is a liquid fatty acid ester having at least one fatty acid unit and at least one ethylene glycol unit, and the aforementioned 2 nd compound is a solid polyethylene glycol, or

The 1 st compound is liquid polyethylene glycol or a derivative thereof, or liquid polypropylene glycol or a derivative thereof, the 2 nd compound is a solid aliphatic compound selected from the group consisting of a solid fatty acid and a solid soap,

when the solid nonionic surfactant is an ethoxylated fatty alcohol, the HLB value is at least 13,

when the solid fatty compound is a solid fatty acid, the total amount of the liquid is larger than the total amount of the solid.

Patent document 3 discloses a substrate comprising a lotion composition containing:

a) about 20 to about 80 wt.% of 1 or more compounds a selected from the group consisting of liquid polyethylene glycol, liquid polyethylene glycol derivatives, liquid polypropylene glycol derivatives, liquid polyols, liquid fatty acid esters containing at least one fatty acid unit and at least one ethylene glycol unit, liquid fatty acid esters containing at least one fatty acid unit and at least one propylene glycol unit, and mixtures thereof, which is liquid at 25 ℃;

b) from about 5 to about 50% by weight of 1 or more compounds B which are solid at 25 ℃ and selected from the group consisting of solid polyethylene glycol derivatives, solid polypropylene glycol derivatives, solid alkoxylated nonionic surfactants, solid glycerides, solid sorbitan and derivatives, solid sucrose esters and derivatives, solid glucose esters and derivatives, and mixtures thereof;

c) about 1 to about 40 wt% of 1 or more crystallization accelerators C selected from the group consisting of C14-C22 aliphatic alcohols, C12-C22 fatty acids, solid fatty soaps, and waxes selected from the group consisting of carnauba wax, ozokerite, beeswax, candelilla wax, paraffin wax, white wax, esparto wax, rawso wax (rezowax), isoparaffin wax, and mixtures thereof,

the weight ratio of the compound A to the crystallization accelerator (C) is 3:2 to 10: 1.

Documents of the prior art

Patent document

Patent document 1: japanese Kokai publication No. 2010-525862

Patent document 2: japanese Kokai publication No. 2010-526629

Patent document 3: japanese Kohyo publication No. 2013-504408

Disclosure of Invention

Problems to be solved by the invention

The lotion compositions described in patent documents 1 to 3 are described to reduce the adhesion of feces or menstrual blood to the skin, and to make it possible to easily remove the feces or menstrual blood after the absorbent article is used and removed by the wearer.

However, the present inventors have confirmed that it is difficult to completely prevent feces and menstrual blood from adhering to the skin and that feces and menstrual blood adhering to the skin are not easily removed when an absorbent article including the lotion composition described in patent documents 1 to 3 is worn.

Further, since the lotion compositions described in patent documents 1 to 3 include the 2 nd compound (patent documents 1 and 2) or the compound B (patent document 3) which is solid at 25 ℃, the crystallization accelerator C (patent document 3), and the like, the lotion compositions are solid at 25 ℃, and therefore, the absorbent article is poor in wearing feeling due to the lotion composition at the initial stage of wearing, and the lotion composition is difficult to exert its function.

Accordingly, an object of the present disclosure is to provide an absorbent article having excellent wiping properties of a highly viscous body fluid adhering to the skin.

Means for solving the problems

The present inventors have found an absorbent article comprising a liquid-permeable sheet, a liquid-impermeable sheet, and an absorbent body therebetween, the absorbent article comprising: a wiping property improving agent for improving wiping property of body fluid, or a wiping property improving composition containing the wiping property improving agent, wherein the wiping property improving agent has an IOB of 0.6 to 3.0, a surface tension of 39 to 60mN/m (25 ℃), a PET plate contact angle of 30 to 65 ° (25 ℃), a water contact angle of 0 to 30 ° (25 ℃), and a water contact angle of 90 to 500mm²Kinematic viscosity in/s (40 ℃).

ADVANTAGEOUS EFFECTS OF INVENTION

The absorbent article of the present disclosure is excellent in the wiping properties of highly viscous body fluids adhering to the skin.

Detailed Description

Specifically, the present disclosure relates to the following aspects.

[ means 1]

An absorbent article comprising a liquid-permeable sheet, a liquid-impermeable sheet, and an absorbent body therebetween,

the absorbent article comprises a wiping property improving agent for improving the wiping property of body fluid or a wiping property improving composition containing the wiping property improving agent,

the above wiping property improving agent has

0.6 to 3.0 of IOB,

A surface tension of 39 to 65mN/m (25 ℃), a,

A contact angle of the PET plate of 30 to 65 degrees (25℃),

A water contact angle of 0 to 30 DEG (25 ℃), and

90～500mm²kinematic viscosity in/s (40 ℃).

(a) Since the above-mentioned wiping property improving agent has a predetermined kinematic viscosity and a predetermined surface tension, the wiping property improving agent is less likely to move before the absorbent article is used (for example, during storage), and the wiping property improving agent present in the absorbent article is likely to move to the skin of the wearer of the absorbent article when the absorbent article is used by separating from the absorbent article.

(b) Further, since the above-mentioned wiping property improving agent has a predetermined kinematic viscosity and a predetermined PET plate contact angle, the wiping property improving agent that has moved to the skin of the wearer spreads on the skin, and a coating film is easily formed on the skin.

(c) Since the wiping property improving agent has a certain degree of affinity with the hydrophobic substance and the hydrophilic substance due to the predetermined IOB, the wiping property improving agent has a certain affinity (easy compatibility) with a highly viscous body fluid (for example, feces, loose stool, menstrual blood, and the like), and the body fluid can be appropriately compatible with the coating film.

(d) Further, since the above-mentioned wiping property improving agent has a predetermined kinematic viscosity and a predetermined water contact angle, when the skin is cleaned with a cleaning sheet (e.g., wet wipe), the wiping property improving agent present on the skin can move to the cleaning sheet.

(e) Further, since the above-mentioned wiping property improving agent has a predetermined IOB, a predetermined surface tension, a predetermined PET plate contact angle and a predetermined water contact angle, the wiping property improving agent moved to the cleansing sheet is not easily separated from the cleansing sheet, and the wiping property improving agent on the cleansing sheet has a certain affinity with a body fluid, so that the body fluid can be removed together with the coating film formed on the skin.

(f) Further, since the wiping property improving agent has a predetermined IOB, a predetermined surface tension, a predetermined PET plate contact angle, and a predetermined water contact angle, the wiping property improving agent and the body fluid are less likely to separate from each other, and the cleaning sheet can hold the body fluid removed from the skin.

As described above, the wiping property improving agent is excellent in wiping property of body fluid adhering to the skin.

[ means 2]

The absorbent article according to mode 1, wherein the wiping performance improving agent has a water solubility of 100g (25 ℃) or more in 100g of deionized water.

In the absorbent article, the wiping property improving agent has a predetermined water solubility, and therefore the wiping property improving agent remaining on the skin of the wearer is easily removed by a new cleaning sheet or the like and hardly remains on the skin of the wearer.

[ means 3]

The absorbent article according to mode 1 or 2, wherein the wiping performance improving agent has an IOB of 0.6 to 2.2.

In the absorbent article, since the wiping property improver has a predetermined IOB, the affinity of the wiping property improver for highly hydrophilic body fluid, such as urine, is not excessively high, and the wiping property improver is less likely to flow by the highly hydrophilic body fluid.

[ means 4]

The absorbent article according to any one of aspects 1 to 3, wherein the wiping property improving agent has a weight average molecular weight of 600 to 1800.

In the absorbent article, the wipe improving agent has a predetermined weight average molecular weight, and therefore, the wearer is less likely to feel a sticky feeling of the wipe improving agent.

[ means 5]

The absorbent article according to any one of aspects 1 to 4, wherein the wiping property improving agent is selected from the group consisting of the following (i) and (ii), and any combination thereof,

(i) a compound having (i-1) and (i-2), (i-1): hydrocarbon moiety, (i-2): one or more, same or different, groups selected from the group consisting of a carbonyl group (-CO-) and an oxy group (-O-) interposed between the C-C single bonds of the above hydrocarbon moieties; and

(ii) a compound having (ii-1), (ii-2) and (ii-3), (ii-1): hydrocarbon moiety, (ii-2): one or more, same or different groups selected from the group consisting of a carbonyl group (-CO-) and an oxy group (-O-) interposed between the C-C single bonds of the above hydrocarbon moieties, (ii-3): one or more, same or different groups selected from the group consisting of a carboxyl group (-COOH) and a hydroxyl group (-OH) substituted for the hydrogen atom of the above hydrocarbon moiety,

here, in the compounds of (i) and (ii), when 2 or more oxy groups are inserted, the oxy groups are not adjacent to each other.

In the absorbent article, the improved wiping performance agent has a predetermined structure, and therefore, the improved wiping performance agent is excellent in wiping performance of body fluid adhering to the skin.

[ means 6]

The absorbent article according to any one of aspects 1 to 5, wherein the wiping property improving agent is selected from the group consisting of the following (i ') and (ii'), and any combination thereof,

(i ') A compound having (i' -1) and (i '-2), (i' -1): hydrocarbon moiety, (i' -2): one or more, the same or different, bonds selected from the group consisting of a carbonyl bond (-CO-), an ester bond (-COO-), a carbonate bond (-OCOO-) and an ether bond (-O-) interposed between the C-C single bonds of the above hydrocarbon moieties; and

(ii ') a compound having (ii ' -1), (ii ' -2) and (ii ' -3), (ii ' -1): hydrocarbon moiety, (ii' -2): one or more, the same or different, bonds selected from the group consisting of a carbonyl bond (-CO-), an ester bond (-COO-), a carbonate bond (-OCOO-) and an ether bond (-O-) interposed between the C-C single bonds of the above hydrocarbon moieties, (ii' -3): one or more, same or different groups selected from the group consisting of a carboxyl group (-COOH) and a hydroxyl group (-OH) substituted for the hydrogen atom of the above hydrocarbon moiety,

here, when 2 or more identical or different bonds are inserted into the compounds (i ') and (ii'), the bonds are not adjacent to each other.

[ means 7]

The absorbent article according to any one of aspects 1 to 6, wherein the wiping property improving agent is an ester or ether of (A) (A1) and (A2), and (A1) is a compound having: a hydrocarbon moiety; one or more, the same or different, bonds selected from the group consisting of a carbonyl bond (-CO-), an ester bond (-COO-), a carbonate bond (-OCOO-) and an ether bond (-O-) interposed between the C-C single bonds of the above hydrocarbon moieties; and one or more, same or different groups selected from the group consisting of a carboxyl group (-COOH) and a hydroxyl group (-OH), which are substituted for the hydrogen atom of the above hydrocarbon moiety, (a 2): a polyoxyalkylene glycol.

[ means 8]

The absorbent article according to mode 7, wherein (a1) is selected from the group consisting of (a1), (a2), (A3), and (a4), (a1) is a compound having: a hydrocarbon moiety; one or more, the same or different, bonds selected from the group consisting of a carbonyl bond (-CO-), an ester bond (-COO-), a carbonate bond (-OCOO-) and an ether bond (-O-) interposed between the C-C single bonds of the above hydrocarbon moieties; and one or more, same or different groups selected from the group consisting of a carboxyl group (-COOH) and a hydroxyl group (-OH), which are substituted for the hydrogen atom of the above hydrocarbon moiety, (a 1): saccharides, (a 2): a compound having a chain hydrocarbon moiety and 1 to 10 hydroxyl groups substituting for hydrogen atoms of the chain hydrocarbon moiety, (a 3): a carboxylic acid, hydroxy acid, alkoxy acid or oxo acid containing a chain hydrocarbon moiety and 1 to 6 carboxyl groups substituting for hydrogen atoms of the chain hydrocarbon moiety, (a 4): any ether or ester thereof.

[ means 9]

The absorbent article according to any one of aspects 1 to 8, wherein the wiping property improving agent is a branched polymer.

In the absorbent article, since the wiping property improving agent is a branched polymer, the wiping property improving agent can have a high viscosity at 25 ℃, and the wiping property improving agent is less likely to move during storage at room temperature or the like.

[ means 10]

A cleaning sheet, characterized by comprising: a wiping property improving agent for improving wiping property of body fluid, a wiping property improving composition containing the wiping property improving agent, and a fiber sheet,

the above wiping property improving agent has

0.6 to 3.0 of IOB,

A surface tension of 39 to 60mN/m (25 ℃), a,

A contact angle of the PET plate of 30 to 65 degrees (25 ℃), and

a water contact angle of 0 to 30 DEG (25 ℃).

The cleaning sheet can exhibit the effects of (e) and (f) in embodiment 1.

[ means 11]

The cleaning sheet according to mode 10, wherein the wiping property improving agent further has a thickness of 90 to 500mm²Kinematic viscosity in/s (40 ℃).

In the cleansing sheet, the wiping performance improving agent can move to the skin of the wearer when cleansing the skin, and therefore the wiping performance improving agent can exhibit the effects of (b) to (f) in embodiment 1.

[ means 12]

Use of a wiping property improving agent or a wiping property improving composition containing the wiping property improving agent in a fibrous product for improving wiping property of body fluid,

the above wiping property improving agent has

0.6 to 3.0 of IOB,

A surface tension of 39 to 60mN/m (25 ℃), a,

A contact angle of the PET plate of 30 to 65 degrees (25 ℃), and

a water contact angle of 0 to 30 DEG (25 ℃).

In the above-mentioned applications, the above-mentioned wiping property improving agent and wiping property improving composition can exert effects similar to (e) and (f) in mode 1.

[ means 13]

The use according to mode 12, wherein the wiping property improving agent further has a thickness of 90 to 500mm²Kinematic viscosity in/s (40 ℃).

In the above application, since the wiping property improving agent can move to the skin of the wearer when the skin is cleansed, the wiping property improving agent can exert effects similar to (b) to (f) in the aspect 1.

[ means 14]

the skin-contacting surface of the absorbent article includes: a wiping property improving agent for improving wiping property of body fluid or a wiping property improving composition containing the wiping property improving agent,

the above wiping property improving agent has

0.6 to 3.0 of IOB,

A surface tension of 39 to 60mN/m (25 ℃), a,

A contact angle of the PET plate of 30 to 65 degrees (25℃),

A water contact angle of 0 to 30 DEG (25 ℃), and

90～500mm²kinematic viscosity in/s (40 ℃).

The wiping property improving agent functions to move to the cleaning sheet and remove body fluid adhering to the skin of the wearer.

The absorbent article described above can exhibit the same effects as those of embodiment 1.

[ means 15]

The absorbent article according to aspect 14, wherein the wiping performance improving agent functions to suppress adhesion of body fluid to the skin of the wearer.

[ absorbent article ]

An absorbent article of the present disclosure includes a liquid-permeable sheet, a liquid-impermeable sheet, and an absorbent body therebetween, and includes: a wiping property improving agent for improving the wiping property of a body fluid or a wiping property improving composition containing the wiping property improving agent.

The wiping property improving agent of the present disclosure has

(i)0.6 to 3.0 of IOB,

(ii) A surface tension of 39 to 60mN/m (25 ℃), a,

(iii) A contact angle of the PET plate of 30 to 65 degrees (25℃),

(iv) A water contact angle of 0 to 30 DEG (25 ℃), and

(v)90～500mm²kinematic viscosity in/s (40 ℃).

The wiping performance improving agent has an IOB of 0.6-3.0. The lower limit of IOB of the above-described wiping property improving agent is preferably 0.7, and more preferably 0.8. The upper limit of IOB of the wiping property improving agent is preferably 2.5, more preferably 2.2, still more preferably 2.0, and still more preferably 1.5. By providing the IOB to the wiping property improving agent, the wiping property improving agent has a certain degree of affinity for hydrophobic substances and hydrophilic substances, and has a certain affinity (easy compatibility) for highly viscous body fluids (for example, feces, loose stool, menstrual blood, and the like), and the body fluids can be appropriately compatible with the film. Further, the affinity with a highly hydrophilic body fluid such as urine is not so high, and the wiping property improving agent is less likely to flow by the highly hydrophilic body fluid.

IOB (Inorganic Organic Balance) is an index showing the Balance between hydrophilicity and lipophilicity, and in the present specification, means a value calculated by the following formula proposed by kota et al.

IOB-inorganic/organic value

The inorganic and organic values are based on an organic conceptual diagram described in the central region of the concept figure "(prediction and organic conceptual diagram of organic compounds) of the installation concept of the rattan-tree" installation of an air-guide と (japan journal of chemistry) vol.11, No.10(1957) p.719-725.

The organic and inorganic values of the major groups proposed by Tagtian are summarized in Table 1 below.

[ Table 1]

TABLE 1

Radical (I)	Inorganic value	Organic value
			-COOH	150	0
-OH	100	0
			-O-CO-O-	80	0
-CO-	65	0
			-COOR	60	0
-O-	20	0
			Three-key	3	0
Double bond	2	0
			CH₂	0	20
Hetero-branching	0	-10
			Tertiary branching	0	-20
Light metal (salt)	≥500	0
			Heavy metals (salts), amines, NH₃Salt (salt)	≥400	0

The wiping property improving agent has a surface tension of 39-60 mN/m, preferably 39-50 mN/m at 25 ℃. This makes it easy for the wipe improving agent to move from the absorbent article to the skin of the wearer.

In the present specification, the surface tension at 25 ℃ is sometimes described in units of "mN/m (25 ℃)".

The surface tension of the above-mentioned wiping property improving agent was measured at 25 ℃ by the Wilhelmy method. As the surface tension, EZ-Pi Plus from Kibron was used, and the probe moving speed was 0.2mm/s, and 60 seconds after the start of the measurement was used.

For the surface tension, 10 measurements were made using the same wiping property improving agent, and the average value of them was used.

The wiping property improving agent has a PET plate contact angle of 30-65 DEG, preferably 30-55 DEG, more preferably 30-45 DEG, and further preferably 30-40 DEG at 25 ℃. This makes it easy for the wipe improving agent to spread on the skin of the wearer to form a coating film, and for the cleaning sheet or the like to peel off the coating film of the wipe improving agent.

It is known that the contact angle of water to the skin is 82 ° (japanese Society of the Society of biotechnology ,2006, 34 th, No.3, page 171, スキンケア) to achieve the レオロジー characteristics (the smearing feeling of the skin care product and its rheological characteristics) of the circumferentially coating り and とそ). As a result of examining the contact angle of deionized water with respect to each resin plate, it was found that the contact angle of deionized water with respect to a PET plate was 83 °, and the PET plate showed hydrophilicity very close to that of the skin. Therefore, in the present specification, a PET sheet was used to evaluate the wetting of the skin.

In the present specification, the contact angle of a PET sheet at 25 ℃ is described in units of "° (25 ℃).

The contact angle of the above PET plate was measured as follows.

(1) In a thermostatic chamber at 25 ℃, a plate made of an automatic contact angle meter CA-V type (manufactured by Kaihu interface science Co., Ltd.) and a polyethylene terephthalate (hereinafter referred to as "PET plate") were prepared. The PET plate was PET-6010(C.I. TAKIRON Corporation, size: 41.5X 80.0X 1.0 mm).

(2) About 2. mu.L of the wiping property improving agent was dropped on a PET plate using a syringe, and 5 seconds after the dropping, the contact angle of the wiping property improving agent was measured by the theta/2 method using an automatic contact angle meter CA-V type.

(3) The measurements were performed 10 times on different parts of the PET plate, and the average value of them was used as the contact angle.

The wiping property improving agent has a water contact angle of 0 to 30 DEG, preferably 0 to 25 DEG, more preferably 0 to 20 DEG, and further preferably 0 to 15 DEG at 25 ℃. Thus, the wiping property improving agent moved to the cleansing sheet is less likely to be separated from the cleansing sheet, and the wiping property improving agent on the cleansing sheet is likely to remove the body fluid together with the coating film formed on the skin.

In the present specification, the contact angle of water at 25 ℃ is described in units of "° (25 ℃).

The water contact angle was measured as follows.

(1) In a thermostatic chamber at 25 ℃, a plate made of an automatic contact angle meter CA-V type (manufactured by Kaihu interface science Co., Ltd.) and a polyethylene terephthalate (hereinafter referred to as "PET plate") were prepared. The PET plate was PET-6010 (41.5X 80.0X 1mm) from the TAKIRON Corporation

(2) In a PET plate at 10g/m²The basis weight of (2) is coated with a wiping property improving agent. The scratch resistance improver can be applied to the PET sheet by, for example, a bar coater (for example, a stainless steel bar wound with a stainless steel wire).

(3) About 2. mu.L of deionized water was dropped on the wiping property improver 5 minutes after the application of the wiping property improver using a syringe, and 5 seconds after the dropping, the contact angle of the deionized water was measured by the theta/2 method using an automatic contact angle meter CA-V type.

(4) The measurement was performed 10 times at different sites of the wiping property improving agent, and the average value of these was used as the contact angle.

The wiping property improver has a thickness of 90 to 500mm at 40 DEG C²S, preferably 150 to 450mm²S, and more preferably 200 to 400mm²Kinematic viscosity in/s. Thus, the wiping-property improving agent is less likely to move during storage of the absorbent article, and is likely to move to the skin of the wearer and then to the cleaning sheet during use of the absorbent article.

In the present specification, the kinematic viscosity at 40 ℃ is sometimes expressed in "mm²The unit of/[ 40 ℃ C. ] ".

There is a tendency that a) the higher the molecular weight of the wiping property improving agent is, b) the higher the ratio of polar groups such as carbonyl bond (-CO-), ether bond (-O-), carboxyl group (-COOH), hydroxyl group (-OH) and the like is, and c) the larger the IOB is, the higher the kinematic viscosity is.

The kinematic viscosity described above is measured according to JIS K2283: 2000 "kinematic viscosity test method", using a Cannon-Fenske countercurrent viscometer at a test temperature of 40 ℃.

The kinematic viscosity at 25 ℃ can also be measured by changing the test temperature to 25 ℃.

The above-mentioned wiping property improving agent preferably has a water solubility of 100g or more in 100g of deionized water at 25 ℃. Thus, the wiping property improving agent remaining on the skin of the wearer is easily removed by a new cleaning sheet or the like, and is not easily left on the skin of the wearer.

In the present specification, the water solubility at 25 ℃ is described in units of "g (25 ℃)".

The water solubility can be measured by adding a predetermined amount, for example, 100g of the wiping property improving agent to 100g of deionized water at 25 ℃, leaving the mixture for 1 minute, stirring the mixture gently as needed, and then visually evaluating whether or not the wiping property improving agent is dissolved.

In the present specification, the term "dissolved" as to water solubility includes: the wiping property improving agent is completely dissolved in deionized water to form a uniform mixture; and, the wiping property improving agent is completely emulsified and liquefied. Note that "completely" refers to a phase in which no wiping property improving agent is present in deionized water.

The wiping property improving agent preferably has a weight average molecular weight of 600 to 1800, more preferably 800 to 1600, and further preferably 1000 to 1400. This makes it difficult for the wearer to feel the sticky feeling of the wiping property improving agent.

In the present specification, the term "weight average molecular weight" is intended to include polydisperse compounds (e.g., compounds produced by stepwise polymerization, esters formed from a plurality of fatty acids and a plurality of aliphatic monohydric alcohols), and single compounds (e.g., formed from 1 fatty acid and 1 aliphatic monohydric alcohol)Ester of (a) in the presence of N) in a solvent_iMolecular weight M of_iThe system of (i ═ 1 or i ═ 1,2 …) refers to M obtained by the following equation_w。

M_w＝ΣN_iM_i ²/ΣN_iM_i

In the present specification, the weight average molecular weight refers to a value in terms of polystyrene determined by Gel Permeation Chromatography (GPC).

The measurement conditions of GPC include, for example, the following conditions.

The device types are as follows: high performance liquid chromatography, Lachrom Elite, manufactured by Hitachi High-Technologies Corporation

A chromatographic column: SHODEX KF-801, KF-803 and KF-804, manufactured by SHOWA AND ELECTRICITY CO

Eluent: THF (tetrahydrofuran)

Flow rate: 1.0 mL/min

Sample introduction amount: 100 μ L

And (3) detection: RI (differential refractometer)

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

The wiping property improving agent is preferably low in vapor pressure. The vapor pressure of the wiping property improver is preferably 0 to 200Pa, more preferably 0 to 100Pa, further preferably 0 to 10Pa, further preferably 0 to 1Pa, and further more preferably 0.0 to 0.1Pa at 25 ℃ (1 atm).

When the absorbent article of the present disclosure is used in consideration of contact with a human body, the vapor pressure is preferably 0 to 700Pa, more preferably 0 to 100Pa, further preferably 0 to 10Pa, further more preferably 0 to 1Pa, and further more preferably 0.0 to 0.1Pa at 40 ℃ (1 atm). This is because, if the vapor pressure of the wiping property improving agent is high, the agent may be vaporized during storage, and problems such as a decrease in the amount of the agent and odor during wearing may occur.

The above-mentioned wiping property improving agent is preferably selected from the group consisting of the following (i) and (ii) and any combination thereof,

(i) a compound having (i-1) and (i-2) (hereinafter sometimes referred to as "compound (i)"), (i-1): hydrocarbon moiety, (i-2): one or more, same or different, groups selected from the group consisting of a carbonyl group (-CO-) and an oxy group (-O-) interposed between the C-C single bonds of the above hydrocarbon moieties; and

(ii) a compound having (ii-1), (ii-2) and (ii-3) (hereinafter sometimes referred to as "compound (ii)"), (ii-1): hydrocarbon moiety, (ii-2): one or more, same or different groups selected from the group consisting of a carbonyl group (-CO-) and an oxy group (-O-) interposed between the C-C single bonds of the above hydrocarbon moieties, (ii-3): one or more, same or different groups selected from the group consisting of a carboxyl group (-COOH) and a hydroxyl group (-OH), which substitute for the hydrogen atom of the above hydrocarbon moiety.

In the present specification, the "hydrocarbon moiety" refers to a moiety formed from carbon and hydrogen, and includes a chain hydrocarbon moiety, for example, an alkane-based hydrocarbon moiety (also referred to as an alkane) containing no double bond or triple bond, an olefin-based hydrocarbon moiety (also referred to as an alkene containing 1 double bond), an alkyne-based hydrocarbon moiety (also referred to as an alkyne containing 1 triple bond), and a hydrocarbon moiety containing 2 or more bonds selected from the group consisting of a double bond and a triple bond, and a cyclic hydrocarbon moiety, for example, an aromatic hydrocarbon moiety, an alicyclic hydrocarbon moiety, and any combination thereof.

The chain hydrocarbon includes a straight-chain hydrocarbon and a branched-chain hydrocarbon. The alicyclic hydrocarbon moiety may contain a double bond.

The hydrocarbon moiety may be selected from the group consisting of a chain hydrocarbon moiety, an alicyclic hydrocarbon moiety, and a combination thereof (for example, a chain hydrocarbon moiety having an alicyclic hydrocarbon moiety and a chain hydrocarbon moiety linked to the alicyclic hydrocarbon moiety).

When 2 or more oxy groups (-O-) are inserted into the compound (i) and the compound (ii), the oxy groups (-O-) are not adjacent to each other. Therefore, compounds (i) and (ii) do not contain a compound having a continuous oxygen group (so-called peroxide).

In the case where the above-mentioned wiping property improving agent is the compound (ii), it is preferably a compound in which at least one hydrogen atom of the hydrocarbon moiety is substituted with a hydroxyl group (-OH), as compared with a compound in which at least one hydrogen atom of the hydrocarbon moiety is substituted with a carboxyl group (-COOH). This is because the carboxyl group is bonded to a metal or the like in the body fluid, and the IOB, surface tension, water solubility, and the like of the wiping property improving agent are increased, and may exceed a predetermined range.

The above-mentioned wiping property improving agent is more preferably selected from the group consisting of the following (i ') and (ii'), and any combination thereof,

(i ') a compound having (i ' -1) and (i ' -2) (hereinafter sometimes referred to as "compound (i ')"), (i ' -1): hydrocarbon moiety, (i' -2): one or more, the same or different, bonds selected from the group consisting of a carbonyl bond (-CO-), an ester bond (-COO-), a carbonate bond (-OCOO-) and an ether bond (-O-) interposed between the C-C single bonds of the above hydrocarbon moieties; and

(ii ') a compound having (ii' -1), (ii '-2) and (ii' -3) (hereinafter sometimes referred to as "compound (ii ')"), (ii' -1): hydrocarbon moiety, (ii' -2): one or more, the same or different, bonds selected from the group consisting of a carbonyl bond (-CO-), an ester bond (-COO-), a carbonate bond (-OCOO-) and an ether bond (-O-) interposed between the C-C single bonds of the above hydrocarbon moieties, (ii' -3): one or more, same or different groups selected from the group consisting of a carboxyl group (-COOH) and a hydroxyl group (-OH), which substitute for the hydrogen atom of the above hydrocarbon moiety.

In the case where 2 or more identical or different bonds are inserted into the compound (i ') and the compound (ii'), that is, in the case where 2 or more identical or different bonds selected from a carbonyl bond (-CO-), an ester bond (-COO-), a carbonate bond (-OCOO-) and an ether bond (-O-) are inserted, the bonds are not adjacent to each other, and at least 1 carbon atom is interposed between the bonds.

In the case where the above-mentioned wiping property improving agent is the compound (ii'), it is preferable that at least one hydrogen atom of the hydrocarbon moiety is substituted with a hydroxyl group (-OH) as compared with a compound in which at least one hydrogen atom of the hydrocarbon moiety is substituted with a carboxyl group (-COOH). This is because the carboxyl group is bonded to a metal or the like in the body fluid, and the IOB, surface tension, water solubility, and the like of the wiping property improving agent are increased, and may exceed a predetermined range.

The wiping property improving agent is more preferably (A) below

(A) (A1) and an ester or ether of (A2) (hereinafter sometimes referred to as "Compound A"), (A1) is a compound having: a hydrocarbon moiety; one or more, the same or different, bonds selected from the group consisting of a carbonyl bond (-CO-), an ester bond (-COO-), a carbonate bond (-OCOO-) and an ether bond (-O-) interposed between the C-C single bonds of the aforementioned hydrocarbon moieties; and one or more, same or different groups selected from the group consisting of a carboxyl group (-COOH) and a hydroxyl group (-OH), which substitute for a hydrogen atom of the aforementioned hydrocarbon moiety, (a 2): a polyoxyalkylene glycol.

The compound (A) will be described in detail below.

[ Compound (A) ]

Compound (a) is an ester or ether of (a1) and (a2), (a1) is a compound (hereinafter sometimes referred to as "compound (a 1)") having: a hydrocarbon moiety; one or more, the same or different, bonds selected from the group consisting of a carbonyl bond (-CO-), an ester bond (-COO-), a carbonate bond (-OCOO-) and an ether bond (-O-) interposed between the C-C single bonds of the aforementioned hydrocarbon moieties; and one or more, same or different groups selected from the group consisting of a carboxyl group (-COOH) and a hydroxyl group (-OH), which substitute for a hydrogen atom of the aforementioned hydrocarbon moiety, (a 2): a polyoxyalkylene glycol.

The compound (a1) has at least 1 or more, preferably 2 or more, and further preferably 3 or more groups selected from the group consisting of a carboxyl group (-COOH) and a hydroxyl group (-OH). When the number of the groups of the compound (a1) is increased, for example, when the compound (a1) and the compound (a) have 3 or more of the groups, the compound (a) forms a branched polymer, and the wiping property improving agent has a preferable temperature-viscosity behavior.

Examples of the compound (a1) include (a 1): saccharides, (a 2): a compound having a chain hydrocarbon moiety and 1 to 10 hydroxyl groups substituting for hydrogen atoms of the chain hydrocarbon moiety, (a 3): a carboxylic acid, hydroxy acid, alkoxy acid or oxo acid containing a chain hydrocarbon moiety and 1 to 6 carboxyl groups substituting for hydrogen atoms of the chain hydrocarbon moiety, and (a 4): any ether or ester thereof.

As (a 1): examples of the saccharide include monosaccharides (e.g., glucose, galactose, mannose, and fructose), disaccharides (e.g., sucrose, lactose, maltose, trehalose, turanose, and cellobiose), and the like.

As (a 2): examples of the compound having a chain hydrocarbon moiety and 1 to 10 hydroxyl groups substituted for hydrogen atoms of the chain hydrocarbon moiety (hereinafter, may be referred to as "compound (a 2)") include the following compounds.

Chain hydrocarbon decaols, e.g. paraffin decaols

Chain hydrocarbon nonalcohols, e.g. paraffin nonalcohols

Chain hydrocarbon octaols, e.g. paraffin octaols, e.g. D-erythro-D-galacto-octanol

Chain hydrocarbon heptaols, e.g. paraffinic heptaols, e.g. heptanol, avocado sugar alcohols

Catenated hexaols, e.g. alkahexaols, e.g. D-iditol, galactitol (dulcitol), D-glucitol (sorbitol), mannitol

Chain hydrocarbon pentaols, e.g. alkane pentaols, e.g. D-arabitol, L-arabitol, xylitol, ribitol (adonitol)

Chain hydrocarbon tetrols, e.g. alkane tetrols, e.g. erythritol, D-threitol, L-threitol, pentaerythritol

Chain hydrocarbon triols, e.g. alkane triols, e.g. glycerol (glycerine)

Chain hydrocarbon diols, e.g. alkane diols, e.g. C₂～C₆Of a dihydric alcohol, e.g. ethylene glycol, propylene glycol, butylene glycol, pentylene glycol or hexylene glycol

Chain hydrocarbon monoalcohols, e.g. paraffin monoalcohols, e.g. C₂～C₆Of alcohols, e.g. ethanol, propanol, butanol, pentanol or hexanol

The compound (a2) is preferably a compound having a chain hydrocarbon moiety and 3 to 10 hydroxyl groups substituted for the hydrogen atoms of the chain hydrocarbon moiety. The wiping property improving agent thus forms a branched polymer, and the wiping property improving agent can have a high viscosity at 25 ℃, and is less likely to move during storage at room temperature or the like.

As (a 3): examples of the carboxylic acid, hydroxy acid, alkoxy acid or oxo acid (hereinafter, may be referred to as "compound (a 3)") containing a chain hydrocarbon moiety and 1 to 6 carboxyl groups substituting for hydrogen atoms of the chain hydrocarbon moiety include the following.

Catenated hydrocarbon hexacarboxylic acids, e.g. alkane hexacarboxylic acids, e.g. C₃₀The following paraffin hexacarboxylic acids, for example, butane hexaacid, pentane hexaacid, hexane hexaacid, heptane hexaacid, octane hexaacid, nonane hexaacid and decane hexaacid

Catenated hydrocarbon pentacarboxylic acids, e.g. alkane pentacarboxylic acids, e.g. C₃₀The following paraffin pentacarboxylic acids, such as butane penta acid, pentane penta acid, hexane penta acid, heptane penta acid, octane penta acid, nonane penta acid and decane penta acid

Chain hydrocarbon tetracarboxylic acids, e.g. alkanetetracarboxylic acids, e.g. C₃₀The following alkanetetracarboxylic acids, e.g., butanetetracarboxylic acid, pentanetetracarboxylic acid, hexanetetracarboxylic acid, heptanetetracarboxylic acid, octanetetracarboxylic acid, nonanetetracarboxylic acid and decanetetracarboxylic acid

Chain hydrocarbon tricarboxylic acids, e.g. alkane tricarboxylic acids, e.g. C₃₀The following alkane tricarboxylic acids, for example, propane tricarboxylic acid, butane tricarboxylic acid, pentane tricarboxylic acid, hexane tricarboxylic acid, heptane tricarboxylic acid, octane tricarboxylic acid, nonane tricarboxylic acid and decane tricarboxylic acid

Chain hydrocarbon dicarboxylic acids, e.g. alkane dicarboxylic acids, e.g. C₃₀The following alkane dicarboxylic acids, such as ethanedioic acid, propanedioic acid, butanedioic acid, pentanedioic acid, hexanedioic acid, heptanedioic acid, octanedioic acid, nonanedioic acid and decanedioic acid

Chain hydrocarbon monocarboxylic acids, e.g. saturated fatty acids, unsaturated fatty acids

Examples of the saturated fatty acids include C₂～C₃₀Saturated fatty acids, e.g. acetic acid (C)₂) Propionic acid (C)₃) Butyric acid (C)₄) And isomers thereof, e.g. 2-methylpropionic acid (C)₄) Valeric acid (C)₅) And isomers thereof, e.g. 2-methylbutanoic acid (C)₅)2, 2-Dimethylpropanoic acid (C)₅) Hexanoic acid (C)₆) Heptanoic acid (C)₇) Octanoic acid (C)₈) And isomers thereof, e.g. 2-ethylhexanoic acid (C)₈) Pelargonic acid (C)₉) Decanoic acid (C)₁₀) Dodecanoic acid (C)₁₂) Myristic acid (C)₁₄) Hexadecanoic acid (C)₁₆) Heptadecanoic acid (C)₁₇) Octadecanoic acid (C)₁₈) Eicosanoic acid (C)₂₀) Behenic acid (C)₂₂) Tetracosanoic acid (C)₂₄) Hexacosanoic acid (C)₂₆) Octacosanoic acid (C)₂₈) Triacontanoic acid (C)₃₀) And the like, and isomers thereof not listed.

Examples of the unsaturated fatty acid include C₃～C₂₀Unsaturated fatty acids, e.g. unsaturated fatty mono-acids, e.g. crotonic acid (C)₄) Myristic acid (C)₁₄) Palmitoleic acid (C)₁₆) Oleic acid (C)₁₈) Elaidic acid (C)₁₈) 11-Octadecenoic acid (C)₁₈) Cis 9-eicosenoic acid (C)₂₀) Eicosenoic acid (C)₂₀) Etc., unsaturated fatty diacids, e.g. linoleic acid (C)₁₈) Eicosadienoic acid (C)₂₀) Etc., unsaturated fatty triacids, e.g. linolenic acid, e.g. alpha-linolenic acid (C)₁₈) And gamma-linolenic acid (C)₁₈) Pinolenic acid (C)₁₈) Eleostearic acid, e.g. alpha-eleostearic acid (C)₁₈) And beta-eleostearic acid (C)₁₈) And (C) a midic acid₂₀) Dihomo-gamma-linolenic acid (C)₂₀) Eicosatrienoic acid (C)₂₀) Etc., unsaturated fatty tetra-acids, e.g. stearidonic acid (C)₂₀) Arachidonic acid (C)₂₀) Eicosatetraenoic acid (C)₂₀) Etc., unsaturated fatty pentacids, e.g. octadecenoic acid (C)₁₈) Eicosapentaenoic acid (C)₂₀) Etc., and partial hydrides thereof.

The compound (a3) is preferably a carboxylic acid, hydroxy acid, alkoxy acid or oxo acid containing a chain hydrocarbon moiety and 3 to 6 carboxyl groups substituting for the hydrogen atoms of the chain hydrocarbon moiety. This makes it possible to form a branched polymer in the wiping property improving agent, to have a high viscosity at 25 ℃, and to prevent the wiping property improving agent from moving during storage at room temperature.

As (a 4): examples of the optional ether or ester (hereinafter, may be referred to as "compound (a 4)") include an optional ester or ether of compound (a1) to compound (a4), an ether of compound (a2), a polyalkylene triol, a polyglycerol, a diglycerol, a triglycerol, a polyglycol, a polyalkylene glycol, and a polyglycol.

The compound (a3) contains a chain hydrocarbon hydroxy acid having 2 to 4 carboxyl groups, such as malic acid, tartaric acid, citric acid, isocitric acid, a chain hydrocarbon alkoxy acid having 2 to 4 carboxyl groups, such as O-acetyl citric acid, and a chain hydrocarbon oxo acid having 2 to 4 carboxyl groups.

Examples of the compound (A2) include polyoxyC₂～C₆An alkylene glycol. The above polyoxy C₂～C₆Alkylene glycol means i) a glycol having a structure selected from the group consisting of₂～C₆A homopolymer having an alkylene skeleton, that is, any one skeleton of the group consisting of an oxyethylene skeleton, an oxypropylene skeleton, an oxybutylene skeleton, an oxypentylene skeleton and an oxyhexylene skeleton, and having hydroxyl groups at both ends, ii) a block copolymer having 2 or more skeletons selected from the above group, and having hydroxyl groups at both ends, or iii) a random copolymer having 2 or more skeletons selected from the above group, and having hydroxyl groups at both ends.

The above polyoxy C₂～C₆The alkylene glycol is represented by the following formula (1):

HO-(C_mH_2mO)_n-H(1)

(wherein m is an integer of 2 to 6.)

Specific examples of the compound (a) include the following.

UNIOL HS-1600D, manufactured by Nichii oil Co., Ltd

Polyoxypropylene sorbitol produced by adding 25 moles of propylene oxide to 1 mole of sorbitol, weight average molecular weight: about 1600

UNILUBE DGP-700, manufactured by Nikkiso K.K

Polyoxypropylene diglycerol ether produced by adding 9 moles of propylene oxide to 1 mole of diglycerol, weight average molecular weight: about 700 f

MACBIOBRIDE MG-10P, manufactured by Nikko Kogyo

Polyoxypropylene methyl glucoside produced by adding 10 moles of propylene oxide to 1 mole of glucose, weight average molecular weight: about 770

MACBIOBRIDE MG-20P, manufactured by Nikko Kogyo

Polyoxypropylene methyl glucoside produced by adding 20 moles of propylene oxide to 1 mole of glucose, weight average molecular weight: about 1350

MACBIOBRIDE MG-10E, manufactured by Nikko Kogyo

Polyoxyethylene methyl glucoside produced by adding 10 moles of ethylene oxide to 1 mole of glucose, weight average molecular weight: about 630

MACBIOBRIDE MG-20E, manufactured by Nikko Kogyo

Polyoxyethylene methyl glucoside produced by adding 20 moles of ethylene oxide to 1 mole of glucose, weight average molecular weight: about 1070

WILBRIDE S-753 manufactured by Nikkiso K.K

Polyoxyethylene polyoxypropylene polyoxybutylene glycerin produced by adding 8 moles of ethylene oxide, 5 moles of propylene oxide, and 3 moles of butylene oxide to 1 mole of glycerin, weight average molecular weight: about 960

The absorbent article of the present disclosure preferably has the wipe improving agent being a branched polymer. The wiping property improving agent has high viscosity at 25 ℃, and is not easy to move during storage at normal temperature.

The branched polymer preferably has 3 or more branches, more preferably 4 or more branches, further preferably 5 or more branches, and further more preferably 6 or more branches.

[ composition for improving Wipe-ability ]

The wiping property improving composition contains the above wiping property improving agent and at least one other component. The at least one other component is not particularly limited as long as the effect of the present disclosure is not impaired, and examples thereof include those conventionally used in absorbent articles in the art, particularly in top sheets.

Examples of the at least one other component include silicone oil, silicone-based resin, and the like.

Examples of the at least one other component include antioxidants such as BHT (2, 6-di-tert-butyl-p-cresol), BHA (butylated hydroxyanisole), propyl gallate, and the like.

As the at least one other component, for example, vitamins such as natural vitamins or synthetic vitamins can be cited. Examples of the vitamins include water-soluble vitamins such as vitamin B group, e.g., vitamin B₁Vitamin B₂Vitamin B₃Vitamin B₅Vitamin B₆Vitamin B₇Vitamin B₉Vitamin B₁₂Etc., vitamin C.

Examples of the vitamins include fat-soluble vitamins such as vitamin a group, vitamin D group, vitamin E group, vitamin K group and the like.

In addition, the vitamins mentioned above also include their derivatives.

Examples of the at least one other component include amino acids such as alanine, arginine, lysine, histidine, proline, hydroxyproline, and peptides.

As the at least one other component, for example, zeolites such as natural zeolites such as analcime, chabazite, heulandite, natrolite, mordenite and thomsonite, and synthetic zeolites can be cited.

Examples of the at least one other component include cholesterol, hyaluronic acid, lecithin, and ceramide.

Examples of the at least one other component include a drug such as a skin astringent, an anti-acne agent, an anti-wrinkle agent, an anti-cellulite agent, a whitening agent, an antibacterial agent, and an antifungal agent.

Examples of the skin astringent include zinc oxide, aluminum sulfate, and tannic acid, and examples of the oil-soluble skin astringent include oil-soluble polyphenols. Examples of the oil-soluble polyphenol include natural oil-soluble polyphenols such as phellodendron extract, Hypericum erectum extract, sesamum brevifolium extract, chamomile extract, burdock extract, sage extract, tilia huadonensis extract, tilia latifolia extract, birch extract, field horsetail extract, sage extract, walnut extract, hibiscus flower extract, loquat leaf extract, tilia latifolia flower extract, hop extract, horse chestnut extract, and coix seed extract.

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

Examples of the anti-wrinkle agent include lactic acid, salicylic acid derivatives, glycolic acid, phytic acid, lipoic acid, and lysophosphatidic acid.

Examples of the anti-cellulite agent include xanthine compounds such as aminophylline, caffeine, theophylline, and theobromine.

Examples of the whitening agent include niacinamide, kojic acid, arbutin, glucosamine and derivatives thereof, phytosterol derivatives, ascorbic acid and derivatives thereof, mulberry extract and placenta extract.

Examples of the at least one other component include an anti-inflammatory component, a pH adjuster, an antibacterial agent, a humectant, a perfume, a pigment, a dye, a pigment, and a plant extract. Examples of the anti-inflammatory component include natural anti-inflammatory agents such as peony, scutellaria, hypericum, chamomile, licorice, peach leaf, mugwort, perilla extract, and synthetic anti-inflammatory agents such as allantoin and dipotassium glycyrrhizinate.

Examples of the pH adjuster include substances for keeping the skin weakly acidic, such as malic acid, succinic acid, citric acid, tartaric acid, and lactic acid.

Examples of the pigment include titanium oxide.

From the viewpoint of the effect of the present disclosure, the above-mentioned wiping property improving composition contains the wiping property improving agent and at least one other component preferably 50.0 to 99.9 mass% and 0.1 to 50.0 mass%, more preferably 60.0 to 99.9 mass% and 0.1 to 40.0 mass%, further preferably 70.0 to 99.9 mass% and 0.1 to 30.0 mass%, further more preferably 80.0 to 99.9 mass% and 0.1 to 20.0 mass%, further more preferably 90.0 to 99.9 mass% and 0.1 to 10.0 mass%, and further more preferably 95.0 to 99.9 mass% and 0.1 to 5.0 mass%, respectively.

The above-mentioned wiping property improving composition may contain a surfactant in a range in which the effects of the present disclosure are exhibited. More specifically, the composition for improving wiping performance is preferably 0.0 to 1.0g/m²More preferably 0.0 to 0.8g/m²More preferably 0.1 to 0.5g/m²And more preferably 0.1 to 0.3g/m²Contains a surfactant in the range of the basis weight of (a).

When the amount of the surfactant is increased, the surface tension, PET contact angle, water contact angle, and the like of the wiping property improver fall outside predetermined ranges, and the wiping property improver tends to be difficult to exhibit its effects.

The above-mentioned composition for improving wiping properties preferably does not contain water, but water is allowed to be contained within the range that exhibits the disclosed effects. When the composition for improving wiping properties contains water, the amount of the composition for improving wiping properties is preferably more than 0.0g/m²And is 1.0g/m²Less than, more preferably more than 0.0g/m²And is 0.8g/m²The lower, more preferably 0.1g/m²～0.5g/m²And still more preferably 0.1g/m²～0.3g/m²The range of basis weights of (a) contains water.

Water is preferably low because it reduces the absorption performance of the absorbent article.

The composition for improving wiping properties preferably has a thickness of 90 to 500mm at 40 ℃ in the same manner as the composition for improving wiping properties²(ii) s, more preferably 150 to 450mm²(ii) s, and further preferably 200 to 400mm²Kinematic viscosity in/s. Thus, the composition for improving the wiping property and the agent for improving the wiping property are not easily moved during storage of the absorbent article, and are easily moved to the skin of the wearer and then moved to the cleansing sheet during use of the absorbent article.

The composition for improving wiping properties preferably has a surface tension of 39 to 60mN/m, and more preferably 39 to 50mN/m, at 25 ℃ over the entire composition for improving wiping properties, similarly to the agent for improving wiping properties. This makes it easy for the composition for improving the wiping property, and hence the agent for improving the wiping property, to migrate from the absorbent article to the skin of the wearer.

The composition for improving wiping properties preferably has a PET sheet contact angle of 30 to 65 °, more preferably 30 to 55 °, further preferably 30 to 45 °, and further preferably 30 to 40 ° at 25 ℃ as in the case of a wiping property improving agent. Thus, the composition for improving the wiping property, and further the agent for improving the wiping property spread on the skin of the wearer, and the film is easily formed, and the film of the agent for improving the wiping property is easily peeled off by the cleaning sheet or the like.

The wiping property improving composition preferably has a water contact angle of 0 to 30 °, more preferably 0 to 25 °, further preferably 0 to 20 °, and further more preferably 0 to 15 ° at 25 ℃, similarly to the wiping property improving agent. Thus, the composition for improving the wiping property that has moved to the cleaning sheet, and hence the agent for improving the wiping property, are less likely to separate from the cleaning sheet, and the agent for improving the wiping property on the cleaning sheet can easily remove the body fluid together with the coating film formed on the skin.

The liquid-permeable sheet is not particularly limited, and a liquid-permeable sheet generally used in the art may be used, and examples thereof include sheet-like materials having a structure allowing liquid to pass through, such as apertured films, woven fabrics, and nonwoven fabrics. Examples of the fibers constituting the woven fabric and the nonwoven fabric include natural fibers and chemical fibers, examples of the natural fibers include cellulose such as ground pulp and cotton, examples of the chemical fibers include regenerated cellulose such as rayon and fibrillated rayon, semisynthetic cellulose such as acetate and triacetate, thermoplastic hydrophobic chemical fibers, and hydrophilic thermoplastic hydrophobic chemical fibers.

Examples of the thermoplastic hydrophobic chemical fiber include monofilaments of Polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), and the like, and fibers formed of a graft polymer of PE and PP.

Examples of the nonwoven fabric include air-through (air-through) nonwoven fabrics, spunbond nonwoven fabrics, point-bond nonwoven fabrics, spunlace (spunlace) nonwoven fabrics, needle punch (needle punch) nonwoven fabrics, meltblown nonwoven fabrics, and combinations thereof (e.g., SMS).

The absorbent article of the present disclosure can be produced by forming an absorbent article according to a method known in the art, and then applying a wiping property improving agent or a wiping property improving composition to, for example, a liquid-permeable sheet, for example, a excretory opening contact region of the liquid-permeable sheet.

The above-mentioned wiping property improving agent or wiping property improving composition may be applied as a coating liquid containing a volatile solvent such as an alcohol-based solvent, an ester-based solvent, an aromatic solvent, or the like, as required. Since the coating liquid containing the wiping property improving agent or the wiping property improving composition contains a volatile solvent, the viscosity of the coating liquid is reduced, so that the application becomes easy, and the simplification of the application step such as the necessity of heating at the time of coating can be realized.

The method for applying the above-mentioned wiping property improving agent or wiping property improving composition, or a coating liquid containing the same is not particularly limited, and the above-mentioned wiping property improving agent or wiping property improving composition, or a coating liquid containing the same may be heated as necessary, and the wiping property improving agent or wiping property improving composition, or a coating liquid containing the same may be applied using a coating apparatus such as a non-contact coater, for example, a spiral coater, a curtain coater, a spray coater, a dip coater, or a contact coater. The coating device is preferably a non-contact coater from the viewpoint of uniformly dispersing all of the modifier in the form of droplets or particles and from the viewpoint of not damaging the material.

The wiping property improving agent, the wiping property improving composition, or the coating liquid containing the same may be heated to be liquefied directly or when the liquid is a solid at room temperature, and applied from a controlled seam Hot Melt Adhesive (HMA) gun. By increasing the air pressure of the slit-controlled HMA gun, a fine particulate wipe improvement agent or wipe improvement composition can be applied.

The coating amount of the wiping property improving agent or the wiping property improving composition can be adjusted by, for example, increasing or decreasing the coating amount of the HMA gun through a control slit.

The absorbent article of the present disclosure may be coated with the wipe improving agent or the wipe improving composition at any position within the range in which the effects of the present disclosure are exhibited, for example, in the thickness direction of the absorbent article, on a liquid-permeable sheet, for example, a skin-contacting surface of the liquid-permeable sheet, or the like.

The absorbent article of the present disclosure may be provided with a wiping performance improving agent or a wiping performance improving composition, for example, in the entire liquid-permeable sheet or in the excretory opening contact region, specifically, in the anal opening contact region, the vaginal opening contact region, or the like, in the planar direction of the absorbent article.

The absorbent article of the present disclosure preferably has a basis weight of 1.0 to 30g/m as a wipe improving agent²More preferably 2.0 to 20g/m²And further preferably 3.0 to 10g/m²The range of the basis weight of (b) contains a wiping property improving agent or a wiping property improving composition. This makes it difficult for the wiping performance improving agent to prevent the body fluid having a low viscosity from migrating to the absorbent body while exerting its function.

In the present specification, the basis weight of the wiping property improving agent contained in the absorbent article is measured as follows.

(1) The range to be measured of the liquid-permeable sheet is cut out using a sharp cutting tool such as a spare blade of a cutter so as not to change the thickness thereof, and a sample is obtained.

(2) Area of the sample to be measured: SA (m)²) And the mass: SM₀(g)。

(3) The sample is stirred in a solvent, such as ethanol, acetone, etc., in which the scratch resistance improver can be dissolved, for at least 3 minutes, and the scratch resistance improver is dissolved in the solvent.

(4) The sample is filtered on a filter paper of measured mass, on which the sample is washed thoroughly with solvent. The sample on the filter paper was dried in an oven at 60 ℃.

(5) Determining the mass of the filter paper and the sample, subtracting the filter from itThe mass of the dried sample was calculated from the mass of the paper: SM₁(g)。

(6) Basis weight BBS (g/m) of the wiping Performance improving agent²) The calculation is performed by the following equation.

BBS(g/m²)＝[SM₀(g)-SM₁(g)]/SA(m²)

Note that, in order to reduce the error, the total area of the sample is made to exceed 100cm²The plurality of absorbent articles of (1) a plurality of samples were taken and the experiment was repeated a plurality of times, taking their average value.

Examples of the absorbent article of the present disclosure include disposable diapers, urine absorbent pads, disposable pants, sanitary napkins, panty liners, pet sheets, and diaper replacement sheets.

[ cleaning sheet ]

The cleaning sheet of the present disclosure includes: a wiping property improving agent for improving wiping property of body fluid, a wiping property improving composition containing the wiping property improving agent, and a fiber sheet.

The cleaning sheet has a wiping property improving agent

(i)0.6 to 3.0 of IOB,

(ii) A surface tension of 39 to 60mN/m (25 ℃), a,

(iii) A contact angle of the PET plate of 30 to 65 degrees (25 ℃), and

(iv) a water contact angle of 0 to 30 DEG (25 ℃).

The conditions (i) to (iv) of the wiping property improving agent for a cleansing sheet are described in the section of "absorbent article", and therefore the description thereof is omitted.

The wiping property improving agent for the cleaning sheet does not have to be 90 to 500mm because of low necessity of movement²A kinematic viscosity at 40 ℃ of 90 to 500mm²Kinematic viscosity in/s (40 ℃). Thus, when the wiping property improving agent is applied to the fiber sheet, the wiping property improving agent is easily moved from the cleansing sheet to the skin of the wearer.

Examples of the fibrous sheet include the same fibrous sheets as the liquid-permeable sheets described in the section of "absorbent articles", and for example, the fibrous sheet is used in the form of a wet wipe impregnated with a chemical solution.

[ use of a Wipe Property-improving agent or a Wipe Property-improving composition ]

In the use of the wipe improving agent or the wipe improving composition of the present disclosure, the wipe improving agent has

(i)0.6 to 3.0 of IOB,

(ii) A surface tension of 39 to 60mN/m (25 ℃), a,

(iii) A contact angle of the PET plate of 30 to 65 degrees (25 ℃), and

(iv) a water contact angle of 0 to 30 DEG (25 ℃).

The conditions (i) to (iv) of the above-mentioned wiping property improving agent are described in the section of "absorbent article", and therefore, the description thereof is omitted.

The wiping property improving agent may not have a thickness of 90 to 500mm because of its low necessity of movement²A kinematic viscosity at 40 ℃ of 90 to 500mm²Kinematic viscosity in/s (40 ℃).

The fiber product using the wiping property improving agent is not particularly limited, and the absorbent article and the cleaning sheet may be mentioned.

Examples

The present disclosure will be described below by way of examples, but the present disclosure is not limited to these examples.

[ example 1]

[ evaluation of wiping Rate and film formability ]

Wiping property improving agents Nos. 1 to 22 shown in Table 2 were prepared. The detailed description of the wiping property improving agents nos. 1 to 22 is as follows, but the description of the wiping property improving agents nos. 1 to 7 is omitted here because it is described in the present specification.

＜No.8＞

UNIOL D-1000 manufactured by Nikkiso K.K

Polypropylene glycol, weight average molecular weight: about 1000

＜No.9＞

UNIOL PB-700, manufactured by Nikkiso K.K

Polyoxybutylene polyoxypropylene glycol, weight average molecular weight: about 700 f

＜No.10＞

·SOLBULE GS-01

PPG-13-decyltetradecanol polyether-24, weight average molecular weight: about 2160

＜No.11＞

UNILUBE MS-70K, manufactured by Nichisu oil Co., Ltd

Stearyl ether of polypropylene glycol, about 15 repeating units, weight average molecular weight: about 1140

＜No.12＞

UNISAFE PGML, manufactured by Nissan oil Co., Ltd

Propylene glycol laurate, weight average molecular weight: about 260

＜No.13＞

COMPOL BL manufactured by Nikkiso K.K

Dodecanoic acid (C) of butanediol₁₂) Monoester, weight average molecular weight: about 270

＜No.14＞

PANACET 810S, manufactured by Nissan oil Co., Ltd

Containing C in a weight ratio of approximately 85:15₈Fatty acid of (2C)₁₀Triglyceride of fatty acid, weight average molecular weight: about 480

＜No.15＞

UNIOL TG-1000 manufactured by Nichisu oil Co., Ltd

Glyceryl ether of polypropylene glycol, about 16 repeating units, weight average molecular weight: about 1000

＜No.16＞

UNISTAR H-408BRS, manufactured by Nissan oil Co., Ltd

Pentaerythritol tetra-2-ethylhexanoate, weight average molecular weight: about 640

＜No.17＞

PARLEAM 6, manufactured by Nikkiso K.K

Branched hydrocarbons produced by copolymerizing liquid isoparaffin, isobutylene, and n-butene, followed by hydrogenation, degree of polymerization: about 5 to about 10, weight average molecular weight: about 330

＜No.18＞

Glycerol

＜No.19＞

UNIOL SGP-65, manufactured by Nichisu oil Co., Ltd

Glyceryl ether of polypropylene glycol, about 8 repeating units, weight average molecular weight: about 550

＜No.20＞

ACROBUTE MB-90, manufactured by Nikkiso K.K

PPG-90 butyl ether, weight average molecular weight: about 5300

＜No.21＞

UNILUBE 75DE-2620R, manufactured by Nichikoku K.K

Polyoxyethylene polyoxypropylene glycol (240E.O.) (60P.O.), weight average molecular weight: about 14000

＜No.22＞

MACBIOBRIDE MG-10P (50 parts by mass) and stearyl alcohol (50 parts by mass) were mixed together to give a wiping property improving agent No. 22.

In patent document 3, stearyl alcohol is exemplified as a solid aliphatic alcohol which is solid at 25 ℃ and a crystallization accelerator C.

The characteristics of the wiping properties improving agents Nos. 1 to 22 are shown in Table 2.

[ just wipe rate ]

The stool rub rate was determined as described below.

(1) In a thermostatic chamber at 25 ℃, a test plate was prepared in which an artificial leather was bonded to an acrylic plate (dimension: 140 mm. times.360 mm) so that the width direction of the acrylic plate and the width direction of the artificial leather (PBZ 13001, dimension: 140 mm. times.200 mm, manufactured by IDEATEX JAPAN) were aligned, and the center in the longitudinal direction of the acrylic plate and the center in the longitudinal direction of the artificial leather were aligned. Further, as a weight, a stainless steel plate (50X 80mm, cell area (cm) was prepared²) The mass of (A): 0.74 g).

(2) An artificial soft stool was prepared, and the viscosity thereof was measured with a TVB10 type viscometer (manufactured by tokyo corporation) each time, and deionized water was added thereto to adjust to 7000mPa · s.

It should be noted that the artificial soft feces are prepared by mixing deionized water: 71.9 parts by mass, sodium chloride: 1.0 part by mass, glycerin: 15.0 parts by mass of CMC sodium: 2.0 parts by mass of Triton X-100: 0.05 part by mass, red No. 102: 0.05 parts by mass, and powdered cellulose: 10.0 parts by mass.

(3) On artificial leather at a rate of 10g/m²The wiping property improving agents No.1 to No.22 were applied to the base weight of (1).

(4) On the artificial leather, 0.5g of artificial stool was placed at a distance of 50mm from one end edge in the longitudinal direction of the artificial leather and at the center in the width direction.

(5) The initial mass of the wet wipes (manufactured by Unicharm Corporation, Moony hip wipes thicker) was determined: m is₀(g) Then, the wet tissue is folded in half, and the wet tissue is placed on the artificial soft stool in a manner that the center of the wet tissue is consistent with the position of the artificial soft stool.

(6) The stainless steel plate was placed on the wet tissue so that the center of the stainless steel plate was aligned with the center of the wet tissue.

(7) The wet tissue was moved to the other end edge of the artificial leather in the longitudinal direction at a speed of about 400 mm/min in a state where the stainless steel plate was placed.

(8) Determination of post-test quality of wet wipes: m is₁(g) The wiping rate is calculated by the following equation:

the wiping rate (mass%) of feces is 100 × (m)₁-m₀)/0.5

(9) The total of 3 measurements were made for each of the wiping property improving agents nos. 1 to 22, and the average value of the total of 3 measurements was used.

[ film Forming Property ]

The film formability was tested as described below.

(1) When the wiping property improving agents nos. 1 to 22 were applied to the skin of the forearm of the subject and spread, the film formation properties were evaluated on the following 3 scales.

O: a uniform coating film was formed.

And (delta): an uneven coating film is formed.

X: no coating was formed.

[ Table 2]

It is found that the wiping properties of the wiping property improving agents Nos. 1 to 7 are high in the wiping rate of feces and urine and excellent in the wiping property of feces and urine. Further, it was found that the wiping properties of the wiping property improving agent No.3 were superior to those of the wiping property improving agent No.22 containing a solid aliphatic alcohol which was solid at 25 ℃ and stearyl alcohol which was exemplified as the crystallization accelerator C. The wiping property improving agent No.22 hardly moved to the wet tissue, and the artificial soft stool remained on the wiping property improving agent No.22 of the artificial leather.

[ example 2]

The commercially available disposable diapers (manufactured by Unicharm Corporation, Moony S size) were each set at 10g/m²Disposable diapers Nos. 1 to 22 were produced by applying the wiping property improving agents Nos. 1 to 22 in a range of 150X 75mm, respectively, with the basis weight of (1) to (22) as the center of the anal contact area.

When disposable diapers were changed, 10 volunteer subjects were allowed to wear disposable diapers nos. 1 to 22, respectively, and the skin of the wearer was cleaned with a wet wipe (manufactured by Unicharm Corporation, thick for wiping the buttocks), and the number of wet wipes required for cleaning was recorded.

As a result, the number of wet wipes used for cleaning the skin of the wearer tends to be smaller as the wiping property improver having more excellent film formability is used. In addition, in a disposable diaper containing a wiping property improver having excellent film formability, the higher the wiping rate of the wiping property improver, the smaller the number of wet sheets used for cleaning the skin of the wearer tends to be.

For example, the disposable diaper No.3 containing the wiping property improving agent had a wet wipe of 3.64 sheets/time, and the disposable diaper No.3 containing the wiping property improving agent No.3 had a wet wipe of 2.88 sheets/time.

Claims

1. An absorbent article comprising a liquid-permeable sheet, a liquid-impermeable sheet, and an absorbent body therebetween,

the absorbent article includes: a wiping property improving agent for improving the wiping property of a body fluid or a wiping property improving composition containing the wiping property improving agent,

the wiping property improving agent has

0.6 to 3.0 of IOB,

A surface tension of 39 to 60mN/m (25 ℃), a,

A contact angle of the PET plate of 30 to 65 degrees (25℃),

A water contact angle of 0 to 30 DEG (25 ℃), and

90～500mm²kinematic viscosity in/s (40 ℃).

2. The absorbent article of claim 1, wherein the wipe performance improver has a water solubility of 100g (25 ℃) or greater in 100g of deionized water.

3. The absorbent article according to claim 1 or 2, wherein the wiping performance improving agent has an IOB of 0.6 to 2.2.

4. The absorbent article according to any one of claims 1 to 3, wherein the wiping property improving agent has a weight average molecular weight of 600 to 1800.

5. The absorbent article according to any one of claims 1 to 4, wherein the wiping property improving agent is selected from the group consisting of the following (i) and (ii), and any combination thereof,

(i) a compound having (i-1) and (i-2), (i-1): hydrocarbon moiety, (i-2): one or more, identical or different, groups selected from the group consisting of carbonyl (-CO-) and oxy (-O-) interposed between the C-C single bonds of the hydrocarbon moieties; and

(ii) a compound having (ii-1), (ii-2) and (ii-3), (ii-1): hydrocarbon moiety, (ii-2): one or more, identical or different groups selected from the group consisting of carbonyl (-CO-) and oxy (-O-) interposed between the C-C single bonds of the hydrocarbon moiety, (ii-3): one or more, same or different groups selected from the group consisting of a carboxyl group (-COOH) and a hydroxyl group (-OH) substituted for a hydrogen atom of the hydrocarbon moiety,

6. The absorbent article according to any one of claims 1 to 5, wherein the wiping property improving agent is selected from the group consisting of the following (i ') and (ii'), and any combination thereof,

(i ') A compound having (i' -1) and (i '-2), (i' -1): hydrocarbon moiety, (i' -2): one or more, the same or different, bonds selected from the group consisting of a carbonyl bond (-CO-), an ester bond (-COO-), a carbonate bond (-OCOO-) and an ether bond (-O-) interposed between the C-C single bonds of the hydrocarbon moiety; and

(ii ') a compound having (ii ' -1), (ii ' -2) and (ii ' -3), (ii ' -1): hydrocarbon moiety, (ii' -2): one or more, same or different, bonds selected from the group consisting of a carbonyl bond (-CO-), an ester bond (-COO-), a carbonate bond (-OCOO-) and an ether bond (-O-) interposed between the C-C single bonds of the hydrocarbon moiety, (ii' -3): one or more, same or different groups selected from the group consisting of a carboxyl group (-COOH) and a hydroxyl group (-OH) substituted for a hydrogen atom of the hydrocarbon moiety,

7. The absorbent article according to any one of claims 1 to 6, wherein the wiping property improving agent is an ester or ether of (A) (A1) and (A2), (A1) is a compound having: a hydrocarbon moiety; one or more, the same or different, bonds selected from the group consisting of a carbonyl bond (-CO-), an ester bond (-COO-), a carbonate bond (-OCOO-) and an ether bond (-O-) interposed between the C-C single bonds of the hydrocarbon moiety; and one or more, same or different groups selected from the group consisting of a carboxyl group (-COOH) and a hydroxyl group (-OH), substituted for a hydrogen atom of the hydrocarbon moiety, (a 2): a polyoxyalkylene glycol.

8. The absorbent article of claim 7, wherein (a1) is selected from the group consisting of (a1), (a2), (A3), and (a4), (a1) is a compound having: a hydrocarbon moiety; one or more, the same or different, bonds selected from the group consisting of a carbonyl bond (-CO-), an ester bond (-COO-), a carbonate bond (-OCOO-) and an ether bond (-O-) interposed between the C-C single bonds of the hydrocarbon moiety; and one or more, same or different groups selected from the group consisting of a carboxyl group (-COOH) and a hydroxyl group (-OH), substituted for a hydrogen atom of the hydrocarbon moiety, (a 1): saccharides, (a 2): a compound having a chain hydrocarbon moiety and 1 to 10 hydroxyl groups substituting for hydrogen atoms of the chain hydrocarbon moiety, (a 3): a carboxylic acid, hydroxy acid, alkoxy acid or oxo acid containing a chain hydrocarbon moiety and 2 to 6 carboxyl groups substituting for hydrogen atoms of the chain hydrocarbon moiety, (a 4): any ether or ester thereof.

9. The absorbent article according to any one of claims 1 to 8, wherein the wiping property improving agent is a branched polymer.

10. A cleaning sheet, characterized by comprising: a wiping property improving agent for improving wiping property of body fluid or a wiping property improving composition containing the wiping property improving agent, and a fiber sheet,

the wiping property improving agent has

0.6 to 3.0 of IOB,

A surface tension of 39 to 60mN/m (25 ℃), a,

A contact angle of the PET plate of 30 to 65 degrees (25 ℃), and

a water contact angle of 0 to 30 DEG (25 ℃).

11. The cleaning sheet according to claim 10, wherein the wiping property improving agent further has a thickness of 90 to 500mm²Kinematic viscosity in/s (40 ℃).

12. Use of a wipe improving agent or a wipe improving composition comprising said wipe improving agent in a fibrous product for improving the wipe of bodily fluids, characterized in that,

the wiping property improving agent has

0.6 to 3.0 of IOB,

A surface tension of 39 to 60mN/m (25 ℃), a,

A contact angle of the PET plate of 30 to 65 degrees (25 ℃), and

a water contact angle of 0 to 30 DEG (25 ℃).

13. Use according to claim 12, wherein the wipe improvement agent further has a thickness of 90 to 500mm²Kinematic viscosity in/s (40 ℃).

14. An absorbent article comprising a liquid-permeable sheet, a liquid-impermeable sheet, and an absorbent body therebetween,

the skin-contacting surface of the absorbent article includes: a wiping property improving agent for improving the wiping property of a body fluid or a wiping property improving composition containing the wiping property improving agent,

the wiping property improving agent has

0.6 to 3.0 of IOB,

A surface tension of 39 to 60mN/m (25 ℃), a,

A contact angle of the PET plate of 30 to 65 degrees (25℃),

A water contact angle of 0 to 30 DEG (25 ℃), and

90～500mm²a kinematic viscosity in/s (40 ℃),

15. The absorbent article according to claim 14, wherein the wiping performance improving agent functions in such a manner as to inhibit bodily fluids from adhering to the skin of the wearer.