JP6738179B2 - Absorbent article - Google Patents

Description

The present invention relates to absorbent articles.

Absorbent articles such as disposable diapers, sanitary napkins and incontinence pads are usually used in a state where they can directly touch the skin of the user. In addition, a liquid-permeable nonwoven fabric is arranged in a portion that can be touched by the user's skin to improve the touch. Generally, such a liquid-permeable nonwoven fabric is hydrophilic in order to enhance the permeability of water such as urine. Therefore, although the hydrophilic liquid-permeable nonwoven fabric is excellent in water permeability, it often causes clogging with respect to excretions containing water and oil such as loose stool and breast milk.

Therefore, an absorbent article having improved performance of absorbing and holding such loose stool has been proposed. For example, in Patent Document 1, an article body is configured by including at least a top sheet arranged on the front surface side, a back sheet arranged on the back surface side, and an absorber interposed between the sheets. A disposable absorbent article having a stool pocket for accommodating and holding excrement in a buttocks contacting portion of the article body, wherein an absorbent article having an opening of the stool pocket covered with a mesh sheet is described. (See Patent Document 1 (Claim 1)).

Further, Patent Document 2 discloses a sheet arranged between a diaper and a user's crotch, and has a plurality of cutting portions cut in the thickness direction in at least a region excluding the peripheral edge of the sheet, Displacement portions are formed between the adjacent cut portions so that the excrement from the crotch adheres to the diaper so that the displacement portions are displaced, and the plurality of displacement portions are arranged at intervals. The auxiliary sheet for use is described (see Patent Document 2 (Claim 1)).

JP, 2006-136702, A JP, 2014-226385, A

Conventionally, as a method of improving the performance of absorbing excrement containing water and oil, a method of forming a hole in the top sheet, a method of providing a space for temporarily confining excrement, and the like have been used. However, the fundamental solution has not been reached, and there is a problem that side leakage occurs during use. The present invention has been made in view of the above circumstances, and provides an absorbent article capable of efficiently absorbing excrement containing water and oil such as loose stool and breast milk without physically processing the top sheet. The purpose is to do.

The absorbent article of the present invention has a liquid-permeable nonwoven fabric, a liquid-impermeable sheet, and an absorber arranged between these, and the fibers constituting the liquid-permeable nonwoven fabric are lipophilic cellulose. It is characterized by containing a system fiber. The lipophilic cellulosic fiber has a high hydrophilicity because it has a cellulose skeleton, and since it is lipophilic, it has a high affinity for oil. Therefore, by using the liquid-permeable nonwoven fabric containing the lipophilic cellulosic fiber for the top sheet, an absorbent article capable of efficiently absorbing excrement containing moisture and oil such as loose stool and breast milk can be obtained.

The fiber constituting the liquid-permeable nonwoven fabric contains the lipophilic cellulose-based fiber and a synthetic resin fiber, the content of the lipophilic cellulose-based fiber in the fiber constituting the liquid-permeable nonwoven fabric, It is preferably 5% by mass to 40% by mass. The lipophilic cellulose fibers are preferably cellulose fibers surface-treated with an oil agent. The liquid-pervious nonwoven fabric is an air-through nonwoven fabric preferably has a basis weight is ^{15g / m 2 ~40g / m 2} .

ADVANTAGE OF THE INVENTION According to this invention, the absorbent article which can absorb efficiently excrement containing water and oil, such as loose feces and breast milk, is obtained.

The typical top view of an example of the absorptive article of the present invention. FIG. 5 is a sectional view taken along line VV of FIG. 1.

The absorbent article of the present invention has a liquid-permeable nonwoven fabric, a liquid-impermeable sheet, and an absorber arranged between them.

[Liquid-permeable nonwoven fabric]
The liquid-permeable nonwoven fabric is a nonwoven fabric that is permeable to liquid. The liquid-permeable nonwoven fabric is characterized by containing lipophilic cellulose-based fibers as fibers constituting the nonwoven fabric. The liquid-permeable nonwoven fabric containing the lipophilic cellulosic fiber has a high affinity for both water and oil, and can easily permeate these water and oil. Therefore, by using the liquid-permeable nonwoven fabric containing the lipophilic cellulosic fibers, it is possible to obtain an absorbent article capable of efficiently absorbing excrements containing water and oil such as loose stool and breast milk.

(Lipophilic cellulosic fiber)
The lipophilic cellulosic fiber is a fiber having a cellulose skeleton, and the fiber surface is lipophilic (hydrophobicized) treated. Since the lipophilic cellulosic fiber has a cellulose skeleton, it has excellent hydrophilicity. Further, since the lipophilic cellulosic fiber is lipophilic, the affinity for oil is also enhanced.

The lipophilic cellulosic fiber has a contact angle with water of preferably 81° or more, more preferably 90° or more, preferably 125° or less, and more preferably 121° or less. When the contact angle of the lipophilic cellulosic fiber to water is 81° or more, swelling of the cellulose fiber is suppressed by absorbing water in the body fluid, voids between the fibers are maintained, and body fluid permeation rate Is improved, and if it is 125° or less, the liquid permeation rate becomes good. The contact angle of water of the cellulosic fibers not subjected to the lipophilic treatment is 10° or less.

The lipophilic cellulosic fiber is not particularly limited as long as it is a cellulosic fiber having an increased lipophilicity, and examples thereof include cellulosic fibers surface-treated with a lipophilic agent. By performing the surface treatment with the lipophilic agent, the lipophilicity (hydrophobicity) of the cellulosic fiber can be easily adjusted.

Examples of the cellulosic fibers include natural cellulose fibers, regenerated cellulose fibers, and semisynthetic cellulose fibers. Examples of natural cellulose fibers include cotton, hemp, and wood pulp. Examples of regenerated cellulose fibers include rayon, polynosic, cupra, and lyocell. Examples of the semi-synthetic cellulose fiber include diacetate fiber and triacetate fiber. Of these, regenerated cellulose fibers are preferable, and rayon is more preferable.

The lipophilic agent is not particularly limited as long as it is a compound that can enhance the lipophilicity of cellulosic fibers. Examples of the lipophilic agent include a compound capable of binding to a hydroxyl group of a cellulosic fiber and introducing a hydrophobic group (lipophilic group); a compound having lipophilicity and capable of coating the surface of the cellulosic fiber. To be That is, examples of the lipophilic cellulosic fiber include a cellulosic fiber in which a hydroxyl group is bonded to a lipophilic agent and a hydrophobic group is introduced; and a cellulosic fiber whose surface is coated with the lipophilic agent.

Examples of the hydrophobic group include an alkyl group having 4 to 26 carbon atoms, an aryl group having 6 to 20 carbon atoms, an aralkyl group having 7 to 26 carbon atoms, and the like. Examples of the compound capable of introducing the hydrophobic group include compounds having a functional group capable of reacting with a hydroxyl group in the molecule and the hydrophobic group. Examples of such a compound include a carboxylic acid having a hydrophobic group and an amine having a hydrophobic group.

Examples of the compound capable of coating the surface of the cellulosic fiber include a fatty acid salt, a fatty acid ester, a fatty acid amide, a silicon-based oil agent, and a fluorine-based oil agent. Examples of the fatty acid salt include salts of fatty acids having 8 to 35 carbon atoms such as barium laurate, zinc laurate, calcium stearate, zinc stearate, and magnesium stearate. Examples of the fatty acid ester include esters of fatty acids having 8 to 35 carbon atoms and alcohols, such as glycerin fatty acid ester, pentaerythritol fatty acid ester, diglycerin fatty acid ester, and polyglycerin fatty acid ester. Examples of the fatty acid amide include amides of fatty acids having 8 to 35 carbon atoms and amines, such as stearic acid amide, erucic acid amide, methylenebisstearic acid amide, ethylenebisstearic acid amide, and ethylenebishydroxystearic acid amide. Can be mentioned. Examples of the silicone-based oil agent include silicone oils such as polydimethylsiloxane and polymethylphenylsiloxane.

Examples of the method for treating the cellulosic fiber with the lipophilic agent include a method in which the cellulosic fiber is immersed in a solution containing the lipophilic agent and then dried; Examples thereof include a method of spraying a solution containing an oiling agent; a method of transferring a lipophilic agent onto a sheet of cellulosic fibers by a roll; and the like.

When a compound capable of coating the surface of the cellulosic fiber is used, the amount of the compound used may be appropriately adjusted depending on the desired lipophilicity of the cellulosic fiber. The amount of the compound added is preferably 0.05 parts by mass or more and 15 parts by mass or less with respect to 100 parts by mass of the cellulose fiber.

The fineness of the lipophilic cellulosic fiber is preferably 1.0 dtex or more, more preferably 1.2 dtex or more, further preferably 2.0 dtex or more, 20 dtex or less, more preferably 18 dtex or less, further preferably It is 15 dtex or less. When the fineness is 1.0 dtex or more, the mechanical strength of the non-woven fabric is increased and the occurrence of tearing during use is suppressed, and when it is 20 dtex or less, the texture of the non-woven fabric is good.

The average fiber length of the lipophilic cellulosic fiber is preferably 2 mm or more, more preferably 4 mm or more, further preferably 10 mm or more, preferably 200 mm or less, more preferably 180 mm or less, still more preferably 150 mm or less. .. When the average fiber length is 2 mm or more, the decrease in the liquid permeation rate due to clogging is suppressed, and when the average fiber length is 200 mm or less, the liquid permeation rate and the solid content filtration performance can both be achieved. The average fiber length is measured by the staple diagram method (method A) of JIS L 1015 (2010).

(Synthetic resin fiber)
The fibers forming the liquid-permeable nonwoven fabric preferably contain synthetic resin fibers in addition to the lipophilic cellulosic fibers. By including the synthetic resin fiber, the physical properties of the nonwoven fabric can be easily controlled.

The synthetic resin fibers are not particularly limited, but include polyolefin fibers such as polyethylene fibers and polypropylene fibers; polyester fibers such as polyethylene terephthalate fibers, polytrimethylene terephthalate fibers and polybutylene terephthalate fibers; polyamides such as polyamide 6 fibers and polyamide 66 fibers. Fibers; acrylic fibers such as polyacrylonitrile fibers; polyvinyl alcohol fibers; polyurethane fibers; polyvinyl chloride fibers; and the like. As the synthetic resin fiber, one having a heat fusion property is preferable. By containing the synthetic resin fiber having a heat fusion property, the fibers can be fused by a thermal bonding method.

The synthetic resin fiber may have a single layer structure or a multilayer structure of two or more layers. The fiber having a multilayer structure is preferably a core-sheath type fiber composed of a core portion made of the first component and a sheath portion made of the second component. Examples of the combination of the first component and the second component include polyethylene/polyethylene terephthalate, polyamide/polyurethane, polyethylene/polypropylene and the like.

When the synthetic resin fiber is a hydrophobic fiber, it may be subjected to a hydrophilic treatment. By making the synthetic resin fiber hydrophilic, the hydrophilicity (hydrophobicity) of the entire liquid-permeable nonwoven fabric can be controlled to a higher degree.

The fineness of the synthetic resin fiber is preferably 1.0 dtex or more, more preferably 1.2 dtex or more, further preferably 1.5 dtex or more, 20 dtex or less, more preferably 18 dtex or less, further preferably 15 dtex or less. is there. When the fineness is 1.0 dtex or more, the filtration rate of the body fluid is high and the occurrence of leakage can be suppressed, and when the fineness is 20 dtex or less, the texture of the nonwoven fabric is good.

The average fiber length of the synthetic resin fiber is preferably 2 mm or more, more preferably 3 mm or more, further preferably 4 mm or more, preferably 200 mm or less, more preferably 180 mm or less, still more preferably 150 mm or less. When the average fiber length of the synthetic resin fibers is 2 mm or more, it is possible to produce a nonwoven fabric having an excellent body fluid filtration rate, and when it is 200 mm or less, the work efficiency of the nonwoven fabric production is good.

When synthetic resin fibers are used, the content of the lipophilic cellulose-based fibers in the fibers forming the liquid-permeable nonwoven fabric is preferably 5% by mass or more, more preferably 7% by mass or more, and further preferably 10% by mass. % Or more, preferably 40% by mass or less, more preferably 35% by mass or less, and further preferably 30% by mass or less. When the content of the lipophilic cellulose fibers is 5% by mass or more, the liquid-permeable nonwoven fabric has high lipophilicity (hydrophobicity) and the permeability of oil is improved, and when 40% by mass or less, the liquid permeability is The non-woven fabric has a high hydrophilicity and improves the moisture permeability.

(Nonwoven fabric)
Examples of the liquid-permeable nonwoven fabric include point bond nonwoven fabrics, air-through nonwoven fabrics, spunlace nonwoven fabrics, spunbond nonwoven fabrics, and air-laid nonwoven fabrics, among which air-through nonwoven fabrics are preferred. The air-through nonwoven fabric has many gaps between fibers and is excellent in the permeability of solid content.

The basis weight of the liquid-permeable nonwoven fabric is preferably 15 g/m ² or more, more preferably 18 g/m ² or more, even more preferably 20 g/m ² or more, and preferably 40 g/m ² or less, more preferably 35 g/m ^2. m ² or less, more preferably 30 g/m ² or less. When the basis weight is 15 g/m ² or more, the tensile strength of the non-woven fabric is high and breakage during use is suppressed, and when it is 40 g/m ² or less, the solid content permeability is good.

The liquid-permeable nonwoven fabric may contain lipophilic cellulosic fibers throughout the nonwoven fabric, or may contain lipophilic cellulosic fibers only in specific portions. When the lipophilic cellulosic fiber is contained in a specific portion of the nonwoven fabric, it is preferable to arrange the lipophilic cellulosic fiber in at least a portion of the liquid-permeable nonwoven fabric corresponding to the approximately central portion in the width direction of the absorbent article. Specifically, in the width direction of the absorbent article, when the distance from one end to the other end of the liquid-permeable nonwoven fabric is 100%, the distance from one end is 20% to 80% (more preferably 30%). ˜70%, more preferably 40% to 60%) in the range of lipophilic cellulosic fibers. The point at a distance of 50% from the one end is the central portion in the width direction.

The non-woven fabric containing the lipophilic cellulosic fiber and the synthetic fiber resin subjected to the hydrophilic treatment has a contact angle with water of preferably 39° or more, more preferably 42° or more, and preferably 97° or less, It is preferably 90° or less. If the contact angle of the non-woven fabric with respect to water is 39° or more, the permeability of the liquid containing oil is better, and if it is 97° or less, the permeability of the liquid containing no oil such as urine is better.

The liquid-permeable nonwoven fabric may have cuts or through holes formed therein if necessary, but it is preferable that the liquid-permeable nonwoven fabric does not have cuts or through holes. The liquid-permeable nonwoven fabric used in the present invention contains lipophilic cellulosic fibers to improve the permeability to fine solids. Therefore, even if the liquid-permeable nonwoven fabric is not provided with through holes, the absorbent article has excellent absorbency against loose stools and the like.

[Absorber]
The absorber can absorb body fluid. The absorber is composed of at least one absorber layer. The absorbent layer preferably contains a water absorbent resin powder as the water absorbent material. The absorbent layer may further contain a water absorbent fiber as a water absorbent material. As the water absorbent resin powder, those conventionally used for absorbent articles can be used. The water-absorbent resin powder contains additives such as preservatives, fungicides, antibacterial agents, antioxidants, ultraviolet absorbers, colorants, fragrances, deodorants, inorganic powders and organic fibrous substances. You can Examples of the water absorbent fibers include pulp fibers, cellulose fibers, rayon, and acetate fibers. The absorbent layer may contain a fiber base material in addition to the water absorbent resin powder. Examples of the fiber base material include heat-sealing fibers. The heat-fusible fiber is used to enhance shape retention. Specific examples of the heat-sealing fibers include polyolefin fibers such as polyethylene and polypropylene, polyester fibers and composite fibers. The absorbent layer containing only the water-absorbent resin powder as the water-absorbent material can be thinned. The absorbent layer containing the fiber base material has excellent dispersibility of body fluid.

The absorbent layer is, for example, a mixture of a hydrophilic water-absorbent resin powder in a hydrophilic fiber aggregate layer such as crushed pulp fibers or cellulose fibers, fixed to a paper sheet such as tissue paper or a liquid-permeable nonwoven sheet, Alternatively, it can be obtained by wrapping with these liquid-permeable nonwoven fabric sheets and molding into a predetermined shape such as a rectangle, an hourglass shape, a gourd shape, or a battledore shape.

The plan view shapes of the water absorbing layer and the absorber are not particularly limited, and examples thereof include a rectangular shape, an hourglass shape, a gourd shape, and a battledore shape. In addition to the water absorbing layer, the absorber may have an adhesive layer for fixing the water absorbent resin powder.

[Impermeable liquid sheet]
The liquid-impervious sheet is arranged on the outermost surface side of the absorbent article, and prevents body fluid and the like from leaking to the outside. Examples of the liquid-impervious sheet include, for example, water-repellent or liquid-impervious non-woven fabrics (for example, spunbonded non-woven fabrics, melt blown non-woven fabrics) formed of hydrophobic fibers (for example, polypropylene, polyethylene, polyester, polyamide, nylon) Uses SMS (spunbond/meltblown/spunbond) non-woven fabrics and water-repellent or liquid-impermeable plastic films to prevent body fluids that have reached the liquid-impermeable sheet from seeping out to the outside of the absorbent article. To do. When a plastic film is used for the liquid-impermeable sheet, it is preferable to use a plastic film having moisture permeability (breathability) from the viewpoint of preventing stuffiness and improving the comfort of the wearer. In addition, a paper sheet may be arranged between the plastic film and the absorbent body in order to impart further diffusibility and shape stability.

[Absorptive article]
Next, a specific application example of the absorber of the present invention will be described. Examples of absorbent articles that can use the absorbent body of the present invention include absorbent pads, disposable diapers, sanitary napkins, and other absorbent articles used for absorbing body fluids discharged from the human body.

When the absorbent article is an absorbent pad or a sanitary napkin, for example, an absorber is arranged between a top sheet (liquid-permeable nonwoven fabric) and a back sheet (liquid-impermeable sheet). Examples of the shape of the absorbent pad and sanitary napkin include a substantially rectangular shape, an hourglass shape, and a gourd shape. If necessary, liquid-impervious side sheets may be provided on both sides in the width direction of the liquid-permeable top sheet. The side sheet is joined to the upper surfaces on both sides in the width direction of the top sheet, and the side sheet on the inner side in the width direction from the joining point forms a pair of rising flaps along both side edges of the absorber.

When the absorbent article is a disposable diaper, as the disposable diaper, for example, a pair of fastening members are provided on the left and right of the back or the front abdomen, and the deployment type disposable is formed into a pants-type when worn. A diaper; a pants-type disposable diaper in which a waist opening and a pair of leg openings are formed by joining the front abdomen and the back are joined together.

When the absorbent article is a disposable diaper, the disposable diaper has, for example, a laminated body including an inner sheet (liquid-permeable nonwoven fabric) and an outer sheet (liquid-impermeable sheet) between the front abdomen and the back portion. It is also possible to form a diaper body composed of a crotch portion located at, and a water absorbing body is arranged at the crotch portion. In addition, the disposable diaper is, for example, a laminated body in which an absorbent body is arranged between a top sheet (liquid-permeable nonwoven fabric) and a back sheet (liquid-impermeable sheet), and the laminated body has a front abdomen and a rear portion. It may have a back part and a crotch part located between them. The front abdomen, the back, and the crotch are referred to as the front abdomen when the disposable diaper is worn, and the part applied to the wearer's buttocks is called the back. The part which is located between the abdomen and the back part and which is applied to the crotch of the wearer is called the crotch part. The inner sheet is preferably hydrophilic or water repellent, and the outer sheet is preferably water repellent.

It is preferable that the absorbent article be provided with rising flaps along both side edges of the absorbent body. The rising flaps may be provided, for example, on both side edges of the upper surface of the absorber in the width direction, or may be provided on both outer sides in the width direction of the absorber. By providing the rising flap, lateral leakage of body fluid can be prevented. The rising flaps may be formed by raising the inner ends of the side sheets provided on both sides in the width direction of the top sheet. The rising flaps and side sheets are preferably water repellent.

Next, the absorbent article of the present invention will be described with reference to FIGS. FIG. 1 represents a plan view of an absorbent pad. FIG. 2 shows a VV sectional view of the absorbent pad of FIG. In the figure, the arrow B is defined as the width direction and the arrow A is defined as the longitudinal direction. Further, the direction on the surface formed by the arrows A and B is defined as the plane direction.

The absorbent pad 1 has a top sheet 2 made of a liquid permeable nonwoven fabric, a back sheet 3 made of a liquid impermeable sheet, and an absorber 4 arranged between them. The top sheet 2 is arranged so as to face the skin of the crotch of the wearer, and allows the excretion of liquid such as urine to pass through. Excrets such as urine that have passed through the top sheet 2 are taken into and absorbed by the absorber 4. The back sheet 3 prevents the excrement from leaking to the outside.

The side sheets 5 extending in the longitudinal direction A of the absorbent pad 1 are joined to both side edges of the top sheet 2 in the width direction B. The side sheet 5 is made of a liquid-impermeable plastic film, a water-repellent nonwoven fabric, or the like. The side sheet 5 is provided with a standing elastic member 6 at the widthwise inner end of the absorbent pad 1. When the absorbent pad 1 is used, the inner end of the side seat 5 rises toward the wearer's skin due to the contracting force of the elastic member 6 for standing up, whereby side leakage of excrement such as urine is prevented.

Hereinafter, the present invention will be described in detail with reference to Examples, but the present invention is not limited to the following Examples, and changes and modifications in a range not departing from the gist of the present invention are not limited to the embodiments of the present invention. It is included in the range.

[Lipophilic cellulosic fiber]
As the lipophilic cellulosic fiber, a cellulosic fiber treated with a lipophilic agent (cellulosic fiber in which a hydroxyl group is bonded to the lipophilic agent and a hydrophobic group is introduced) is used. The lipophilic cellulose-based fiber had an average fiber length of 4 cm, a fineness of 2.2 dtex, and a contact angle with water of 121°.

(Contact angle)
The contact angle of the fiber with respect to water is measured by using an automatic micro contact angle measuring device (manufactured by Kyowa Interface Science Co., Ltd., model "MCA-2"), and the contact angle between the fiber and the water drop when distilled water is dropped on the fiber surface. Was measured with the number of measurements 5 and the average value was obtained.

[Liquid-permeable nonwoven fabric]
Air-through nonwoven fabric Lipophilic cellulosic fibers and synthetic resin fibers (core-sheath composite fibers, core: polyethylene terephthalate, sheath: polyethylene) were mixed and deposited on a screen conveyor to produce a web. The web was heat-treated by an air-through method to fuse the fibers to each other to produce a nonwoven fabric. The content of the lipophilic cellulosic fibers and the basis weight of the non-woven fabric were adjusted to the values shown in Table 1.

Point-bonded non-woven fabric A lipophilic cellulose-based fiber and a synthetic resin fiber (core-sheath composite fiber, core: polyethylene, sheath: polyethylene terephthalate) were mixed, and these were deposited on a screen conveyor to produce a web. This web was heat-treated with an embossing roll to fuse the fibers together to produce a nonwoven fabric. The content of the lipophilic cellulosic fibers and the basis weight of the non-woven fabric were adjusted to the values shown in Table 1.

Spunlace non-woven fabric A lipophilic cellulosic fiber and a synthetic resin fiber (core-sheath type composite fiber, core: polyethylene, sheath: polyethylene terephthalate) were mixed, and these were deposited on a screen conveyor to produce a web. A high-pressure water stream was blown onto this web to entangle the fibers with each other to produce a nonwoven fabric. The content of the lipophilic cellulosic fibers and the basis weight of the non-woven fabric were adjusted to the values shown in Table 1.

The tensile strength of the obtained liquid-permeable nonwoven fabric was evaluated.

(Tensile strength)
The tensile strength of the liquid-permeable nonwoven fabric was measured according to JIS L 1913 (2010). Specifically, five test pieces each having a width of 50 mm and a length of 250 mm were cut out from each liquid-permeable nonwoven fabric in the vertical direction (MD) and the horizontal direction (CD). Tensile strength (strength at maximum load) of each test piece was measured using a tensile tester (Tensilon universal material tester “RTG-1210”, manufactured by A&D Corporation). The measurement conditions were a chuck interval of 170 mm and a pulling speed of 200 mm/min. The average value of the tensile strength of the five test pieces was obtained and evaluated according to the following evaluation criteria.
○: 5N or more △: 3N or more, less than 5N ×: less than 3N

Table 1 shows the evaluation results of the liquid-permeable nonwoven fabric. As shown in Table 1, when the basis weight of the nonwoven fabric was 20 g/m ² or more, the tensile strength was excellent.

Next, the absorbent article using the liquid-permeable nonwoven fabric was evaluated for the absorbency of pseudo loose stool.

(Leakage evaluation)
A top sheet of a commercially available absorbent pad (Saracare (registered trademark) Pad Big (total absorption amount: 1100 ml, manufactured by Rib du Corporation) was changed to the liquid permeable nonwoven fabric to prepare an absorbent article for a test. The produced absorbent article was placed on a table having an inclination of about 10°. A measuring jig was placed at approximately the center of this absorbent article. The measurement jig has an opening (inner diameter 2.54 cm) provided in the center of an acrylic plate (10 cm×10 cm), and an acrylic cylindrical member (inner diameter 2.54 cm) is vertically attached to the opening portion. In the measurement jig, the lower surface of the acrylic plate was brought into contact with the liquid-permeable nonwoven fabric of the absorbent article. 100 ml of pseudo loose stool (tomato juice) was put into the cylinder of this measuring jig, and 1 minute later, the measuring jig was taken up. The degree of absorption of pseudo loose stools and the presence or absence of leakage of the pseudo loose stools to the outside of the absorbent article were visually observed and evaluated according to the following evaluation criteria.
◯: No leakage to the outside and all pseudo loose stools are absorbed.
Δ: There is leakage to the outside, or pseudo loose stool remains on the liquid-permeable nonwoven fabric.
X: There is leakage to the outside, and pseudo loose stools remain on the liquid-permeable nonwoven fabric.

Table 1 shows the evaluation results of the absorbent article.

Absorbent article No. Comparing 1 to 8, when the content of the lipophilic cellulosic fibers in the liquid-permeable nonwoven fabric was 5% by mass to 40% by mass, the absorbability of pseudo loose stool was excellent. Absorbent article No. Comparing 9 to 14, when the fabric weight is 15 g/m ² or more, the tensile strength of the nonwoven fabric is good, and when the fabric weight is 40 g/m ² or less, the pseudo soft stool absorbability is excellent. Absorbent article No. Comparing Nos. 4, 15 and 16, the air-through non-woven fabric was most excellent in the absorbency of pseudo soft feces.

INDUSTRIAL APPLICABILITY The absorbent article of the present invention can be suitably used, for example, for the purpose of absorbing body fluid discharged from the human body, and can be particularly suitably used as an incontinence pad, a disposable diaper, a sanitary napkin and the like.

1: Absorption pad (absorbent article), 2: Top sheet (liquid-permeable nonwoven fabric), 3: Back sheet (liquid-impermeable sheet), 4: Absorber, 5: Side sheet, 6: Standing elastic member

Claims (6)

A liquid-permeable nonwoven fabric, a liquid-impermeable sheet, and an absorbent article having an absorber arranged between them,
The fiber constituting the liquid-permeable nonwoven fabric contains a lipophilic cellulosic fiber and a synthetic resin fiber,
The content of the lipophilic cellulosic fibers in the fibers constituting the liquid-permeable nonwoven fabric is 10% by mass to 40% by mass,
Absorbent article wherein the liquid-pervious nonwoven fabric, a air-through nonwoven fabric, characterized in that its basis weight is ^{15g / m 2 ~40g / m 2} . The absorbent article according to claim 1, wherein the lipophilic cellulosic fiber has a fineness of 1.0 dtex to 20 dtex . It said lipophilic-cellulose scan system fibers, absorbent article according to claim 1 or 2 cellulosic fiber surface-treated with oil. The absorbent article according to claim 3, wherein the cellulosic fibers are regenerated cellulose fibers. The absorbent article according to claim 4, wherein the regenerated cellulose fiber is rayon. The absorbent article according to claim 1, wherein the lipophilic cellulosic fiber has an average fiber length of 2 mm to 200 mm .

Images