JPH11323739A - Fiber-made liquid absorbent and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a fiber-made liquid absorbent that has a soft fabric hand, the resistance to eruption and rash and develops good liquid absorption and excellent back flow prevention, thus is useful as hygienic goods, for example, sanitary goods, diapers and the like. SOLUTION: This fiber-made liquid absorbent 11 comprises a nonwoven fabric of hydrophilic fibers (for example, made of pulp or rayon fibers) 12 and at least one face, namely the liquid inflow face of the fabric is covered with the fluff layer 14 made of hydrophobic short-cut fibers (thermally fusing fiber having the fiber length of 10-60 mm and fineness of 0.5-8 deniers). In a preferred embodiment, the fluff layer is provided with fusing spots 15 by the short-fibers 13 fused to the nonwoven fabric 12. This liquid-absorbing body is produced by arranging the web of short-cut fibers 13 to at least the face on the inflow side of the nonwoven fabric 12, then fusing the web to the nonwoven fabric in spots by means of a thermally embossing machine or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber absorbent that is useful as a material for sanitary products applied to, for example, sanitary products and diapers, and a method for producing the same. More specifically,
The present invention relates to a fiber-absorbing liquid which has good liquid absorption and backflow prevention properties, has a soft texture, and hardly causes rash even when applied to the skin, and a method for producing the same.

[0002]

2. Description of the Related Art
For example, as shown in FIG. 8, a mesh sheet 3 is disposed on a liquid inflow side surface (a side surface that contacts the skin) of a hydrophilic fiber nonwoven fabric 2 for a fiber-absorbing liquid applied to sanitary products such as sanitary products.
There was one obtained by joining the hydrophilic fiber nonwoven fabric 2 and the mesh sheet 3. The fiber absorbing liquid 1 has an advantage that the mesh sheet 3 disposed on the liquid inflow side surface can absorb liquids such as body fluids in a spot manner and hardly return.

[0003] In many cases, however, the mesh sheet 3 that directly touches the skin is formed by making holes in the film, and the mesh sheet 3 is in contact with the skin. Because of this, poor air permeability caused rash.

[0004] The present invention has been made in view of such technical problems, and has a good liquid absorbency and a backflow preventing property, has a soft texture, and can be applied to the skin. It is an object of the present invention to provide a fiber-absorbing liquid which is less likely to cause rash and a method for producing the same.

[0005]

In order to achieve the above object, the invention according to claim 1 is characterized in that at least the liquid inflow side surface of the hydrophilic fiber nonwoven fabric is covered with a fluff layer made of hydrophobic short fibers. The gist of the fiber-absorbing liquid is as follows.

According to a second aspect of the present invention, there is provided a fiber wherein the fluff layer made of hydrophobic short fibers has a dotted heat-sealed portion made of hydrophobic short fibers heat-sealed to the hydrophilic fiber nonwoven fabric. Liquid absorption was used as the gist.

[0007] The gist of the invention according to claim 3 is a fiber-absorbing liquid characterized in that the fiber length of the hydrophobic short fiber is 10 to 60 mm.

According to a fourth aspect of the present invention, there is provided a fiber-absorbing liquid characterized in that the fineness of the hydrophobic short fibers is 0.5 to 8 denier.

[0009] The invention of claim 5 has a gist of a fiber-absorbing liquid characterized in that the hydrophobic short fibers are heat-fusible fibers.

The gist of the invention according to claim 6 is that the hydrophilic fiber nonwoven fabric is a nonwoven fabric having pulp fibers and / or rayon fibers as constituent fibers.

[0011] According to a seventh aspect of the present invention, a hydrophobic short fiber web is disposed on at least a liquid inflow side of a hydrophilic fiber nonwoven fabric, and then the hydrophobic short fiber web is heat-fused on the hydrophilic fiber nonwoven fabric in a dot-like manner. The gist of the present invention is a method for producing a fiber-absorbing liquid.

The gist of the invention of claim 8 is a gist of a method for producing a fiber-absorbing liquid, characterized in that a hydrophobic short fiber web is heat-bonded to a hydrophilic fiber non-woven fabric in a dot shape by a hot embossing device.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a fiber absorbent according to an embodiment of the present invention; First, the fiber absorbing liquid of the present invention will be described. As shown in FIGS. 1 and 2, the fiber absorbent 11 of the present invention is characterized in that at least the liquid inflow side surface of the hydrophilic fiber nonwoven fabric 12 is covered with a fluff layer 14 made of hydrophobic short fibers 13. Things. Fiber absorbing liquid 1 shown in FIG.
1 has a fluff layer 1 on only one surface of the hydrophilic fiber nonwoven fabric 12.
The fiber absorbent 11 shown in FIG. 2 has a fuzz layer 1 on both surfaces of a hydrophilic fiber nonwoven fabric 12.
4 is provided to cover this.

The hydrophilic fiber non-woven fabric 12 is composed of hydrophilic fibers such as pulp fiber, cotton fiber, vegetable fiber such as hemp fiber, and regenerated fiber such as silk fiber and rayon. Then, a fiber web is formed from one or more of these hydrophilic fibers, and the fibers are bonded to each other by applying an emulsion binder thereto, or the fibers are entangled by performing a hydroentanglement treatment. It was produced.

Among the above-mentioned hydrophilic fibers, pulp fibers and rayon fibers are preferable in that cellulose, which is a main component, has a large amount of hydroxyl groups, so that it is rich in liquid absorbency, inexpensive, and easily available. Non-woven fabric 1 comprising a binder-bonded pulp nonwoven fabric using fibers, a spunlace non-woven fabric using rayon fibers, or a binder-bonded nonwoven fabric obtained by blending pulp fibers and rayon fibers.
The following two preferred embodiments can be mentioned. Further, among the binders described above, when an emulsion binder is used, the diffusion of the hydrophilic fiber nonwoven fabric 12 itself by a bodily fluid or the like is accelerated by including a penetrating agent having excellent hydrophilicity therein, and the diffusion area is increased. be able to.

The hydrophilic fiber nonwoven fabric 12 has a function of absorbing and retaining the liquid that has passed through the hydrophobic short fiber web 13. The magnitude of the fiber density of the hydrophilic fiber nonwoven fabric 12 greatly affects the diffusion area of the hydrophilic fiber nonwoven fabric 12. That is, when the fiber density of the hydrophilic fibrous nonwoven fabric 12 is high, the liquid that has passed through the hydrophobic short fiber web 13 in a spot state is diffused widely around, and is absorbed and held in a large area. On the other hand, when the fiber density of the hydrophilic fiber nonwoven fabric 12 is low, the liquid is not diffused widely to the surroundings, but is absorbed and held in a small area.

The fiber density of the hydrophilic fiber nonwoven fabric 12 is as follows:
For example, in the case of a sanitary product, the size may be appropriately changed according to the application, such as reducing the size of the liquid so as to be absorbed in a spot manner, and increasing the size of the diaper so as to absorb the liquid in a large area. A preferable range of the fiber density of the hydrophilic fiber nonwoven fabric 12 is 0.05 to 0.40 g / m ² .

The hydrophilic fiber non-woven fabric 12 may contain, for example, a granular or fibrous polymer absorbent. Specifically, two hydrophilic fiber nonwoven fabrics 12 are vertically stacked, and a polymer absorbent is interposed between the hydrophilic fiber nonwoven fabrics 12 or the granular or fibrous polymer absorbent is coated with the hydrophilic fiber nonwoven fabric. It is scattered or contained in the 12 constituent fibers. In this case, the liquid absorptivity of the hydrophilic fiber nonwoven fabric 12 is further improved, and the return of the liquid can be more effectively suppressed.

At least the liquid inflow side surface of the hydrophilic fiber nonwoven fabric 12, that is, the surface on the skin side that absorbs liquids such as urine and body fluid, is covered with the fluff layer 14 of the hydrophobic short fibers 13. The fluff layer 14 has a function as an introduction path for guiding liquid such as urine to the hydrophilic fiber nonwoven fabric 12 quickly in a spot manner. The fluff layer 14 and the hydrophilic fiber nonwoven fabric 12 may be bonded to each other with a heat-fusible adhesive such as polyester or polyamide interposed therebetween. As a form of applying the adhesive, there is a dot coating method or the like.

The hydrophobic short fibers 1 constituting the fluff layer 14
3 is preferably a heat-fusible fiber such as a polyester fiber such as polyethylene terephthalate or polyethylene terebutylate, a polyolefin fiber such as polyethylene or polypropylene, or a composite fiber obtained by compounding these. The heat fusible fibers are used for all the hydrophobic short fibers 13, or the heat fusible fibers are used for a part of the hydrophobic short fibers 13.

The fiber length of the hydrophobic short fibers 13 is 10
A range of ６０60 mm is preferred. When the fiber length is less than 10 mm, the fibers are easily arranged in the thickness direction (vertical direction),
For this reason, while having a fluffiness and bulkiness, the tensile strength of the fiber-absorbing liquid 11 is impaired. Conversely, when the fiber length exceeds 60 mm, the fibers are more likely to be arranged in the area direction (lateral direction), so that the fibers are less likely to be fluffy, and the liquid is promptly transferred to the hydrophilic fiber nonwoven fabric 12 described above. It leads to poor spot absorption.

The fineness of the hydrophobic short fibers 13 is preferably in the range of 0.5 to 8 denier. Fineness is 0.
When it is less than 5 denier, the texture becomes soft, but the air permeability and water permeability become poor. When the fineness exceeds 8 denier, it will be rich in air permeability and water permeability,
The texture becomes hard.

Specific examples of the hydrophobic short fiber 13 include a heat-fusible conjugate short fiber having a core-sheath structure (polyester / polyester) having a fineness of 2 denier and a fiber length of 45 mm, a fineness of 8 denier, and a fiber length of A heat-fusible conjugate short fiber having a core-sheath structure (polyester / polyester) of 51 mm, a fineness of 2 denier, and a heat-fusible composite short fiber having a core-sheath structure (polypropylene / polyethylene) having a fiber length of 51 mm, the fineness is A heat-fusible conjugate short fiber having a core-sheath structure (polypropylene / polyethylene) having a denier of 4 and a fiber length of 51 mm can be used.

In this case, the heat-fusible conjugate short fiber having the core-sheath structure has a melting point lower in the sheath portion than in the core portion. The melting point is preferably in the range of 165 to 260 ° C for the core and 90 to 130 ° C for the sheath. Other specific examples of the hydrophobic short fibers 13 include polypropylene fibers and polyethylene fibers having a single structure with a fineness of 6 deniers, a fiber length of 51 mm, and a melting point of 165 ° C. The hydrophobic short fibers 13 can be mixed and used.

The fluff layer 14 of the fiber absorbent 11 shown in FIGS. 1 and 2 has a point-like fused portion 15. For this reason, the fluff layer 14 other than the fusion portion 15 is soft because it is covered only with the hydrophobic fibers that are not thermally fused. The fusing layer 15 is composed of the heat-fused hydrophobic short fibers 13, and is arranged, for example, in the form of stripes or at random intervals over the entire surface of the fluff layer 14. Is bonded to the liquid inflow side (skin side) surface of the hydrophilic fiber nonwoven fabric 12. Further, the fused portion 15 is a concave portion scattered in the fluff layer 14, and the fused portion 15
The fluff layer 14 in which the hydrophobic short fibers 13 fluff in the thickness direction or in the diagonal direction rises, creating a surface structure rich in undulations.

Therefore, as shown by the arrows in FIGS. 1 and 2, urine and other liquids efficiently and promptly form a spot through the fluff layer 14 having such a rugged surface structure. It is guided to the hydrophilic fiber nonwoven fabric 12, is absorbed, and diffuses in the area direction at the fused portion 15 in the high-density region. The fiber absorber 11 having such characteristics can also be applied as an internal constituent material of a sanitary product or a diaper that does not directly touch human skin.

Since no liquid such as urine remains on the surface of the fluff layer 14 and there is little return from the hydrophilic fiber nonwoven fabric 12,
When the fiber-absorbing liquid 11 is applied, for example, as a constituent material of a sanitary product or a diaper that directly touches the skin of a human, the fluff layer 14 disposed on the liquid inflow side (skin side) is always free from moisture,
It has a soft touch and is less likely to cause rash.

The number, size, shape, and the like of the fused portions 15 are completely arbitrary, and may be determined as appropriate according to the intended use and use conditions.

In the case of the fiber absorbing liquid 11 shown in FIG.
Both surfaces of the hydrophilic fiber nonwoven fabric 12 are covered with the fluff layer 14, and the surface is always free of moisture and has a soft touch.

Next, the method for producing a fiber-absorbing liquid of the present invention will be described. This method is characterized in that a hydrophobic short fiber web is disposed on at least a liquid inflow side of a hydrophilic fiber nonwoven fabric, and then the hydrophobic short fiber web is heat-fused to the hydrophilic fiber nonwoven fabric in a dot-like manner. It is. In describing the production method of the present invention, the hydrophilic fiber nonwoven fabric and the hydrophobic short fibers are the same as those described in the above-mentioned fiber-absorbing liquid, and thus description thereof will be omitted. .

FIGS. 3, 4 and 7 show the hydrophobic short fibers 13 on one surface side of the hydrophilic fiber nonwoven fabric 12 as shown in FIG.
2 shows a process of manufacturing the fiber absorbent 11 provided with a fluff layer 14 made of a fiber. First, as shown in FIG. 3, a belt 20 running on a hydrophilic fiber nonwoven fabric 12 wound in a roll shape is used.
Roll up. The hydrophilic fiber nonwoven fabric 12 includes pulp fibers,
A hydrophilic fiber such as a cotton fiber or a plant fiber such as a hemp fiber, a regenerated fiber such as a silk fiber or rayon is used as a constituent fiber, and one or more of these hydrophilic fibers are used in a known method such as a card method or an air laid method. A fibrous web is formed by a web forming method. Then, the fiber web is produced by applying a fiber bonding means such as applying an emulsion binder or performing a water entanglement treatment.

Preferred examples of the hydrophilic fiber nonwoven fabric include a binder-bonded nonwoven fabric using pulp fibers, a spunlace nonwoven fabric using rayon fibers, and a binder-bonded nonwoven fabric obtained by blending pulp fibers and rayon fibers. Can be mentioned.

Next, as shown in FIGS. 3 and 4, the hydrophobic short fiber web 21 is placed on the wound hydrophilic fiber nonwoven fabric 12. The hydrophobic short fiber web 21 is made of a heat-fusible material such as a hydrophobic short fiber, particularly a polyester fiber such as polyethylene terephthalate or polyethylene terebutylate, a polyolefin fiber such as polyethylene or polypropylene, or a composite fiber obtained by combining these. It is a fibrous web formed using short fibers.

The basis weight of the hydrophobic short fiber web 21 is preferably in the range of 10 to ²⁰ g / m ² , and when the heat-fusible short fiber has a core-sheath structure, 20 to 100% by weight, and In the case of a single structure, it is desirable that it is contained in a proportion of 20 to 50% by weight in terms of prevention of falling off of fibers, feel, and the like.

Next, as shown in FIG. 7, a laminate 30 in which a hydrophobic short fiber web 21 is placed on a hydrophilic fiber nonwoven fabric 12 is flattened with a metal flat roll 22 having a smooth surface and a metal hot emboss roll. 23, and the hydrophobic short fiber web 21 is heat-fused on the hydrophilic fiber nonwoven fabric 12 in a dot-like manner.

In this case, the heat embossing roll 23 is provided with a number of projections 24 on the peripheral surface, and a heat medium such as steam is fed into the roll. By pressing and heating,
The hydrophobic short fiber web 21 is heat-fused on the hydrophilic fiber nonwoven fabric 12 in a dot-like manner.

The arrangement pattern of the protrusions 24 is arbitrary such as a stripe shape and a random shape. Also, for example, when the projections are large and the projection spacing is small, the area of the portion that is hot-pressed by the projections and heat-sealed becomes large. For this reason, the tensile strength is large, the feeling of the obtained fiber-absorbing liquid is hard, and the absorption amount of the liquid per unit area is also reduced by the large area where the thickness is reduced by heat fusion. On the other hand, when the size of the projections is small and the interval between the projections is large, the area of the heat-sealed portion becomes small, so that the tensile strength is small and the texture of the fiber-absorbing liquid obtained is soft and heat-sealed. The smaller the area of the decrease in thickness due to, the larger the amount of liquid absorbed per unit area. Therefore, the interval between the projections and the size of the projections may be appropriately determined in consideration of the application and the state of use. Specifically, it is desirable that the area ratio of the projections be 20 to 40%.

The surface temperature, pressure (linear pressure) and processing speed of the roll are as follows: a temperature of 100 to 150 ° C .;
0-70kg / cm, processing speed 10-60m / min
Is preferable. On the other hand, the surface temperature of the flat roll 22 is preferably in the range of 100 to 150 ° C.

Another suitable means for heat-sealing the hydrophobic short fiber web 21 in a dot-like manner on the hydrophilic fiber non-woven fabric 12 is an ultrasonic fusing machine.

FIG. 5, FIG. 6 and FIG. 7 show a process for producing a fiber absorbent 11 in which a fuzz layer 14 composed of hydrophobic short fibers 13 is provided on both surfaces of a hydrophilic fiber nonwoven fabric 12 as shown in FIG. Is shown. First, as shown in FIG. 5, the above-described hydrophobic short fiber web 21 is placed on the running belt 20, the hydrophilic fiber nonwoven fabric 12 is placed on the hydrophobic short fiber web 21, and the hydrophilic fiber nonwoven fabric is further placed. By again placing the hydrophobic short fiber web 21 on the top 12, a laminate 31 having the hydrophobic short fiber webs 21 arranged on both upper and lower surfaces of the hydrophilic fiber nonwoven fabric 12 as shown in FIG. 6 is obtained.

Next, as shown in FIG.
1 is passed between the flat roll 22 and the hot embossing roll 23, and the hydrophobic short fiber webs 21 disposed on the upper and lower surfaces of the hydrophilic fiber nonwoven fabric 12 are heat-fused on the hydrophilic fiber nonwoven fabric 12 in a dotted manner. is there.

In this case, the embossing roll 23
Ratio of protrusions, surface temperature of roll 23, pressure (linear pressure)
The processing speed and the surface temperature of the flat roll 22 can be performed under the same conditions as those of the method for manufacturing the fiber absorbent 11 shown in FIG. As for the means for fusing the laminate 31, an ultrasonic fusing machine can be used instead of the hot embossing device.

[0043]

【Example】

Example A core / sheath structure having a fineness of 2 denier and a fiber length of 51 mm (polyester having a core having a melting point of 260 ° C./melting point of a sheath having a melting point of 110%)
A polyester fiber having a heat-fusing property of 15 ° C./m ² is formed by a card method.

On the other hand, kraft pulp is opened, an emulsion binder is applied to a pulp fiber web formed by an air laid method, and the pulp fibers are bonded to each other to obtain a hydrophilic material having a basis weight of 45 g / m ² and a density of 0.05 g / cm ³ . A nonwoven fabric was prepared.

Next, as shown in FIG. 3 and FIG. 4, a hydrophobic short fiber web 21 is placed on the hydrophilic fiber non-woven fabric 12, and thereafter, as shown in FIG.
A laminate 30 on which a hydrophobic short fiber web 21 is placed is passed between a flat roll 22 made of metal having a smooth surface and a hot embossing roll 23, and the hydrophobic short fiber web 21 is passed through a hydrophilic fiber nonwoven fabric 12. The upper portion was heat-fused in a dotted manner to obtain a fiber absorbent 11 shown in FIG. The basis weight of the obtained fiber absorbing liquid is
57.3 g / m ² , thickness: 0.60 mm, tensile strength: 1448 g / 25 mm in vertical direction, 13 in horizontal direction when dry
24g / 25mm, when wet, 912g / 25m in vertical direction
m, 862 g / 25 mm in the horizontal direction.

In this case, as the embossing roll 23, one having an area ratio of the protrusions on the roll peripheral surface of 25% was used, the surface temperature of the roll was 130 ° C., and the linear pressure was 60 kg / kg.
cm, the surface temperature of the flat roll 22 is 130 ° C.,
The processing speed was 30 m / min.

Comparative Example A fiber-absorbing liquid was obtained in the same manner as in Example except that the mesh sheet of a commercially available sanitary product was peeled off and mounted on the same pulp nonwoven fabric as that produced in Example. The basis weight of the fiber-absorbing liquid is 71.5 g / m ² and the thickness is 1.23.
mm, tensile strength when dry, 1015 g / 25 m in longitudinal direction
m, horizontal direction 1016 g / 25 mm, wet, vertical direction 88
It was 4 g / 25 mm and 719 g / 25 mm in the horizontal direction.

With respect to each fiber absorbent according to the above Examples and Comparative Examples, the water absorption (g / m ² ) and water retention (g / m ² )
m ² ), diffusion area (cm ² ), ease of drying (g / 25c)
m ² ) and wettability of the surface (g / 25 cm ² ) were measured by the following procedure.

That is, the amount of water absorption was determined by cutting the fiber-absorbing liquid according to Examples and Comparative Examples into a sample of 100 mm × 100 mm, immersing the sample in physiological saline (0.9%), and then horizontally. The sample was allowed to stand on the installed net for 1 minute to drain water, and the weight of the sample after water absorption minus the weight before immersion was calculated as the water absorption. As a result, 842 g / m ^{2 for} the example and 752 g for the comparative example.
g / m ² . The measurement of the sample weight was expressed as an average value of five measurements using an EK-120 electronic balance manufactured by A & D Corporation.

The amount of water retention was determined by cutting the fiber-absorbing liquid according to the example and the comparative example to a size of 100 mm × 100 mm to prepare a sample, immersing the sample in physiological saline (0.9%), and reducing the water absorption to 45 °. The sample was left standing on an inclined net for 1 minute to drain water, and the weight obtained by subtracting the weight before immersion from the sample weight after water absorption was calculated as the water absorption. As a result, the example was 601 g / m ² , and the comparative example was 531 g / m ² .
It became ² . The sample weight was measured using an EK-120 electronic balance manufactured by A & D Corporation.
It was expressed as the average of the measurements.

The diffusion area was determined by cutting the fiber-absorbing liquid according to the example and the comparative example to a size of 100 mm × 100 mm to obtain a sample, and 0.5 ml of a physiological saline solution (0.
9%) was dropped with a whole pipette, and the diffusion area was determined. As a result, in the example, the surface layer (fluff layer) was used.
0 cm ² , inner layer (hydrophilic fiber nonwoven fabric) 10.1 cm ² ,
The comparative example has a surface layer (mesh sheet) of 8.3c.
m ² , and 8.5 cm ² of the inner layer (hydrophilic fiber nonwoven fabric). From this experimental result, it can be seen that the fiber absorber according to the example is superior in spot absorption in the surface layer and superior in diffusivity in the inner layer, as compared with the comparative example using the conventional mesh sheet as the surface layer. .

The ease of drying was determined by cutting the fiber-absorbing liquid according to the example and the comparative example into a sample of 5 cm × 5 cm to obtain a sample, on which 0.5 ml of distilled water was dropped with a whole pipette. Immediately after the sample, 10 minutes later, 20
After 1 minute and after 30 minutes, the weight was measured with a weighing scale, and the results are shown in Table 1. Further, the reduction rate (%) in the table is a value obtained by dividing the reduction amount of water after each time by the water amount immediately after dropping and multiplying by 100. The sample weight was measured using an electronic balance manufactured by A & D Corporation, EK-
Using 120, it was described as an average value of five measurements.

[0053] From the results in Table 1, it can be seen that the fiber absorber according to the example dries more easily after absorbing water than the comparative example in which a conventional mesh sheet is used as a surface layer.

The wettability of the surface was determined by adding 15 ml of distilled water to the surface of each sample with a whole pipette.
Place a commercially available tissue cut to a size of 0 mm x 150 mm, measure the weight of the tissue after 30 seconds,
The amount of water absorbed was measured. As a result, the water content of the example was 0.038 g / 25 cm ² , and that of the comparative example was 0.041 g / 25 cm ² . The measurement of the sample weight was expressed as an average value of five measurements using an EK-120 electronic balance manufactured by A & D Corporation.

From the experimental results, it can be seen that the fiber-absorbing liquid according to the example has better liquid (distilled water) absorbability and less reversal than the comparative example in which a conventional mesh sheet is used as a surface layer.

Adhesion test The samples according to the above-mentioned examples and comparative examples were each adhered to the lower side of each of five subjects and fixed with tape, and the state thereafter was observed. The patch test is from 8:30 to 17:
The test time was 9 hours up to 30, and it was confirmed whether or not the subject felt stuffiness, itching, etc. during this time. As a result, in the case of the example, there was no stuffiness and itching, but in the case of the comparative example, three persons complained of stuffiness and itch.

The texture was examined by touching the samples according to the above Examples and Comparative Examples by hand. As a result, the one according to the example had a soft texture, while the one according to the comparative example had a slightly hard feeling.

[0058]

According to the present invention, since the surface of the hydrophilic fiber non-woven fabric is covered with a soft fluff layer, the fiber absorbing liquid of the present invention has good liquid absorbing property. It has anti-reflux properties and has a soft texture, and is less likely to cause stuffiness or rash even when applied to the skin. In addition, by employing the fiber-absorbing liquid of the present invention, it is possible to save the labor of laminating a mesh sheet on a hydrophilic fiber non-woven fabric each time at a processing destination such as a sanitary product.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of a main part showing a fiber-absorbing liquid of the present invention.

FIG. 2 is an enlarged sectional view of a main part showing another example of the fiber-absorbing liquid of the present invention.

FIG. 3 is a schematic view showing a step of placing a hydrophobic short fiber web on one surface of a hydrophilic fiber nonwoven fabric.

FIG. 4 is an enlarged sectional view of a main part of the laminate obtained by the step shown in FIG.

FIG. 5 is a schematic view showing a step of placing a hydrophobic short fiber web on both surfaces of a hydrophilic fiber nonwoven fabric.

FIG. 6 is an enlarged sectional view of a main part of the laminate obtained by the step shown in FIG.

FIG. 7 is a schematic view showing a step of heat-sealing the laminate shown in FIG. 4 or FIG.

FIG. 8 is a perspective view showing a conventional fiber-absorbing liquid.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Fiber absorption liquid 12 ... Hydrophilic fiber nonwoven fabric 13 ... Hydrophobic short fiber 14 ... Fuzz layer 15 ... Fused part 21 ... Hydrophobic short fiber web

Claims (8)

[Claims] 1. A fibrous liquid-absorbing material characterized in that at least a liquid inflow side surface of a hydrophilic fiber nonwoven fabric is covered with a fluff layer of hydrophobic short fibers. 2. The fiber according to claim 1, wherein the fluff layer made of the hydrophobic short fibers has a dot-like heat-sealed portion made of the hydrophobic short fibers heat-sealed to the hydrophilic fiber nonwoven fabric. Liquid absorption. 3. The fiber length of the hydrophobic short fiber is 10 to 60.
3. The fiber absorbent according to claim 1, wherein 4. The fiber absorbent according to claim 1, wherein the fineness of the hydrophobic short fibers is 0.5 to 8 denier. 5. The fiber absorbent according to claim 1, wherein the hydrophobic short fibers are heat fusible fibers. 6. The fiber absorbent according to claim 1, wherein the hydrophilic fiber nonwoven fabric is a nonwoven fabric containing pulp and / or rayon as constituent fibers. 7. A hydrophilic short-fiber nonwoven fabric comprising a hydrophobic short-fiber web disposed on at least a liquid inflow side of the nonwoven fabric, and a hydrophobic short-fiber web heat-fused to the hydrophilic fibrous nonwoven fabric in a dot-like manner. A method for producing a fiber absorbing liquid. 8. The method for producing a fiber-absorbing liquid according to claim 7, wherein a hydrophobic short fiber web is heat-fused to the hydrophilic fiber nonwoven fabric in a dot shape by a hot embossing device.