JP2011156319A - Water absorption sheet put in cold reserving muffler towel, and cold reserving muffler towel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cold reserving muffler towel capable of being simply manufactured without dividing the cold reserving muffler towel into small regions, hard to deviate water absorbent resin even if the muffler towel is vertically hung after used to be dried and easy to reuse, and the water absorption sheet put in the cold reserving muffler towel. <P>SOLUTION: The water absorption sheet put in the cold reserving muffler towel is constituted by fixing the sheet at least the water absorbent resin and a water-insoluble water absorbing/holding material other than the water absorbent resin, especially pulp to a water-permeable base material by emboss processing. After the cold reserving muffler towel is impregnated with water to be used, it is vertically hung to be dried before reused. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a water-absorbing sheet to be put into a cold insulation neck towel and a cold insulation neck towel. More specifically, the present invention relates to a water-absorbing sheet used for a cold insulation neck towel using latent heat of evaporation and a cold insulation neck towel containing the water absorption sheet.

  Conventionally, when the human body is hot due to a hot summer season or a cold, the human body is cooled by keeping the neck cold by using a frozen cryogen or a wet towel. The water-containing towel removes heat using the latent heat of vaporization of water. Recent water-containing towels (hereinafter referred to as neck towels) are used in which water-absorbing resin powder is contained, and when this towel contains water, the water-absorbing resin in the gel absorbs and swells to form a gel. Since it gradually evaporates, the neck can be kept cold for a long time. As such, a band (for example, Patent Document 1) for sewing a cooling neckband in the longitudinal direction so as to bisect it in the width direction and putting a water-absorbing resin therein to cool the neck portion, impervious fabric Or there exists a water absorption pad (for example, patent document 2) which makes a water absorbing polymer incorporated using a sheet | seat absorb and emit a water | moisture content. Further, there is “Zinkin” (for example, Patent Document 3) in which a small water absorbent sheet sandwiched between intermediate cloths is further sandwiched between a front cloth and a back cloth.

Registered Utility No. 3019831 Japanese Patent No. 4394160 JP-A-9-170108, paragraph [0008], FIG. 5a.

The neck towel is not always used continuously. When you use it once and store it until next use, it is usually stored after drying. Neck-wrapped towels are usually elongated, so when drying, they are usually air-dried by hanging one end up.
When cooling neckband (neck towel) containing water-absorbent resin powder as described in Patent Document 1 is used after being hydrated, air-dried with one end facing upward, The water-absorbent resin powder that has dried and contracted falls under the neck towel. Then, the water absorbent resin powder is unevenly distributed in the neck towel. When this neck towel is rehydrated, one of the neck towels swells abnormally and the thickness of the neck towel is not uniform, making it difficult to use. Further, in this case, the neck towel is used by hand from the outside to make the thickness uniform (referred to as “shigoku”). In order to hold down the swollen water-absorbing resin, there is a problem that “slimming” comes out of the towel and adheres to the hand, and the work is troublesome.

Since the water-absorbent pad of Patent Document 2 uses an impermeable fabric, it is not assumed to be dried as it is after use. Dividing neck towels into many small areas is also economically disadvantageous.

Although the thing of patent document 3 contains only a water absorbing resin in a water absorbing sheet, the small water absorbing sheet (FIG. 5a) is pinched | interposed with the double cloth, and also there is a clearance gap between "Zinkin" and the neck. As a result, the cooling effect is small.
The present invention can be easily manufactured without dividing the neck towel for cold insulation into small areas, and the water absorbent resin is not easily biased and reused even if the neck towel is hung with one end up and dried after drying. An object of the present invention is to provide a neck towel for cold insulation that is easy to do, and a water-absorbing sheet to be put therein.

  As a result of intensive studies, the present inventor has found that the above-mentioned problems can be solved by putting a specific water-absorbing sheet therein, and has completed the present invention.

  The present invention is a water-absorbing sheet to be placed in a cold-preserving neck towel, wherein the water-absorbing sheet has at least a water-absorbing resin and a water-insoluble water-absorbing / water-retaining material other than the water-absorbing resin fixed to a water-permeable substrate. A water-absorbing sheet for a neck towel for cold insulation, which is a water-absorbing sheet.

Furthermore, the present invention is characterized in that the water-insoluble water-absorbing / retaining material is pulp.
Furthermore, the present invention is characterized in that the fixing method is an embossing method.
Moreover, this invention is a neck-wrap towel in which the said water absorbing sheet was inserted.
Further, the present invention is a method of using a neck towel which is reused after being hydrated and used after being hydrated.

According to the present invention, the water absorbent sheet is a water absorbent sheet in which at least a water absorbent resin and a water-insoluble water absorbent / water retaining material other than the water absorbent resin are fixed to a water-permeable base material. Even if it is hung with one end up and dried, the water-absorbing resin that has dried and contracted is adsorbed to the water-insoluble water-absorbing / water-holding material, and the water-absorbing / water-holding material adheres to the water-permeable base material. It becomes difficult to fall down inside. As a result, since the unevenness of the water-absorbing resin in the neck towel after drying is eliminated, there is no need for “squeezing” to make the unevenness of the gel of the water-absorbing resin uniform by hand after the water content. Since there is no “squeezing”, there is no “slimming” from the inside.

In addition, when a water absorbent sheet is placed in the neck towel, the water absorbent resin in the water absorbent sheet before use is uniformly dispersed, and even if it is first hydrated, it is not necessary to make it uniform. Since the resin comes off from the water-absorbing sheet, when it is hung and dried, the water-absorbing resin falls down as in the case of the towel containing only the water-absorbing resin. Such a problem can be improved because the water-absorbent sheet of the present invention contains a water-insoluble water-absorbing / retaining material.

Furthermore, according to the present invention, the pulp put in the water absorbent sheet has a high affinity with the water absorbent resin, and when water is contained, the pulp is involved to form a gel, so that it is integrated after drying and the water absorbent resin is less likely to fall down. . Therefore, when pulp is used as a water-insoluble water-absorbing / water-retaining material, there is no bias in the water-absorbing resin in the neck towel when it is hung and dried after use, and there is no need for “squeezing” and there is no problem of “numeric” .
Further, according to the present invention, the water-absorbent resin is firmly fixed to the breathable substrate by embossing, and the water-absorbent resin does not easily come off from the water-permeable substrate even after drying with water. However, since the unevenness of the water-absorbing resin is reduced, the “smoothness” is further eliminated.
Further, according to the method of reusing the neck towel of the present invention, after the neck towel has been used once, the water-absorbent resin that has been shrinkage-dried is dried and shrunk even if it is hung and dried with one end of the neck towel. Difficult to fall down in the neck towel bag. Therefore, when the neck towel is reused, it is not necessary to “squeeze” and it is easy to use without “smelling”.

It is sectional drawing of the water absorbing sheet of one Embodiment of this invention. It is a perspective view of the neck towel of one embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described. Note that the present invention is not limited to the following embodiments. Various modifications can be made to the following embodiments within the same and equivalent scope as the present invention.

The water absorbent sheet of the neck towel of the present invention is a water absorbent sheet in which a water absorbent resin and a water-insoluble water absorbent / water retaining material other than the water absorbent resin are fixed by a water-permeable base material. Here, “fixing” means fixing the water-absorbing resin and the water-insoluble water-absorbing / retaining material to one side of the water-based substrate by any means, and water-insoluble to the water-absorbing resin so that at least one side is the water-permeable substrate. This includes both sandwiching the water-absorbing / water-retaining material from both sides with the base material.

Water-insoluble water-absorbing / water-retaining materials are those other than water-absorbing resins that swell when absorbed, such as organic materials such as pulp, water-absorbing fibers, coconut shells, rice straw, wood scraps, wood flour, cotton, sawdust, straw, and coconut shell activated carbon. Examples thereof include inorganic water-insoluble water-absorbing / water-retaining materials and inorganic water-insoluble water-absorbing / water-holding materials such as pearlite, rock wool, porous ceramics, vermiculite, and pumice. Preferred are lightweight and flexible organic water-insoluble water-absorbing / retaining materials, and particularly preferred are economically advantageous pulps that have a high affinity for water-absorbing resins.

Pulp includes, for example, wood pulp (conifer pulp, hardwood pulp), non-wood pulp (eg hemp, straw, three straw, ganpi, rice straw, wheat straw, banana, bagasse, moon peach, kenaf, bamboo, straw, hatobasho, casino ki Etc.). Among them, it is preferable to use softwood pulp that has excellent water absorption and is easily available.

The shape and size of the water-insoluble water-absorbing / water-retaining material is not particularly limited, but is preferably a size that does not escape from the water-permeable substrate. More preferably, they are 0.5 mm or more and 5 mm or less, Especially preferably, they are 1 mm or more and 3 mm or less. If it is 1 mm or more, it is difficult to get out of the water-permeable base material, and if it is 5 mm or less, the neck towel is easy to use without being stiff.

The water-permeable base material is not particularly limited in form and material as long as it has flexibility and water permeability and has a strength that does not break before use. Further, the water permeability is not particularly limited as long as there is a hole through which water can pass, but the size of the hole is preferably 0.001 to 1 mm, particularly preferably 0.01 to 0.5 mm. The thickness of the substrate is preferably 0.001 to 5 mm, more preferably 0.01 to 3 mm.

  Examples of the material for the water-permeable substrate include natural fibers such as cotton, wool, silk, cellulose, and pulp, and synthetic resins or fibers such as polyester, nylon, acrylic, polyethylene, polypropylene, polyurethane, polystyrene, and poval, and modified products thereof. Semi-synthetic fibers such as rayon and acetate, and mixed materials thereof, and paper materials such as western paper and Japanese paper can be applied. Natural fibers and paper are preferred. In addition, paper that is disintegrated by water but does not dissolve but remains solid can be preferably used.

Examples of forms include fabrics such as knitted fabrics, woven fabrics, and nonwoven fabrics; mesh films such as polyethylene, polypropylene, and other sheets with many fine holes; papers such as western paper and Japanese paper. Among these, cloth and paper are preferable, and tissue that disintegrates in non-woven fabric and water but is insoluble in water is particularly preferable. When fixing by the heat fusion method, a material containing a heat fusion material such as a heat fusion fiber and / or a film is used, but “the actual state of the heat fusion nonwoven fabric and the whole heat fusion fiber” (April 1989) Issued on May 24, Osaka Chemical Marketing Center Co., Ltd.).

As a nonwoven fabric, the nonwoven fabric currently used industrially can be used. The nonwoven fabric can be used by any method of a dry method and a wet method, and can be produced by any method such as a spunlace method, a thermal bond method, a spunbond method, and a needle punch method. Basis weight of the nonwoven fabric is not particularly limited preferably ^{30g~500g / m 2, 40g~200g / m} 2 is more preferable.
Further, a felt obtained by collecting and compressing short fibers or long fibers of the above material in a nonwoven fabric is preferable because it has abundant web. Felts are generally called felts such as woven felts, press felts, needle punch felts, etc., and are described in, for example, “Industrial Textile Handbook” (Japan Textile Machinery Society, pages 362 to 381). Can be used.

Here, the water permeability is 30 seconds or less, preferably 15 seconds or less, particularly preferably 5 seconds or less, when expressed in terms of time (seconds) in which 100 ml of ion-exchanged water at 25 ° C. passes through an area of 100 cm ^2. It is.

The non-water-permeable base material is not limited as long as it is flexible and non-water-permeable base material, but synthetic resin films such as polyester film, nylon, polyethylene film, polypropylene film; laminated laminate films of these; aluminum Examples thereof include metal films such as foil, and multilayer laminate films of synthetic resin films and metal films. From the viewpoint of flexibility, a synthetic resin film and a laminated laminate film of synthetic films are preferable. The thickness is not particularly limited.

The water-absorbing resin used in the water-absorbing sheet is not particularly limited as long as it absorbs water and swells, but is inexpensive and has excellent water-absorbing properties such as safety, durability, water-absorbing magnification and water-absorbing speed, And what does not worry about corruption is preferable. As the water-absorbent resin, known resins can be used, such as a polyacrylic acid partially neutralized cross-linked product, a starch-acrylic acid graft polymer neutralized product, a starch-acrylonitrile graft polymer hydrolyzate, and vinyl acetate. -Saponified product of acrylic ester copolymer, isobutylene-maleic anhydride copolymer cross-linked product, hydrolyzate of acrylonitrile copolymer or acrylamide copolymer or cross-linked product thereof, acrylate-acrylamide copolymer cross-linked product, Polyvinyl alcohol cross-linked product, modified polyethylene oxide cross-linked product, acrylamide-2-methylpropane sulfonate copolymer cross-linked product, (meth) acryloylalkane sulfonate copolymer cross-linked product, cross-linked carboxymethyl cellulose salt, cross-linked polymer of cationic monomer Etc. Among these, a polyacrylic acid partial neutralized product cross-linked product and a starch-acrylic acid graft polymer neutralized product are preferable because they have good water absorption swelling properties, water retention, safety and economic efficiency.

It is particularly preferable that the water-absorbent resin hydrogel polymer is added with the following cross-linking agent, mixed, heated and reacted, and then dried and ground. Most preferred is a water-absorbent resin obtained by reacting a crosslinking agent after making the water-absorbent resin powder into a hydrogel. Since water-soluble components such as monomers and oligomers during polymerization are further cross-linked, the amount of water-soluble components remaining in the water-absorbent resin can be further reduced. Therefore, when it is used for a neck towel, it is preferable because “numeric” is further reduced.

As a crosslinking agent used for the reaction, N, N′-methylenebisacrylamide, polyfunctional (meth) acrylate such as (poly) ethylene glycol di (meth) acrylate; ethylene glycol diglycidyl ether, glycerin-1,3-di Examples include polyglycidyl compounds such as glycidyl ether, glycerin triglycidyl ether, and polyethylene glycol diglycidyl ether; polyol compounds such as glycerin, ethylene glycol, and polyethylene glycol; and polyamine compounds such as ethylenediamine and polyamide polyamine epichlorohydrin resin. Of these, preferred crosslinking agents are polyglycidyl compounds and polyol compounds which are difficult to hydrolyze. If the cross-linking agent is difficult to hydrolyze, even if it is used over and over again, there is little “numeric”. The reaction conditions may be the same as those used for the conventional surface cross-linking of the water-absorbent resin.

These water-absorbing resins may be used alone or in combination of two or more. The water-absorbent resin may be granulated in a predetermined shape, and may be in various shapes such as irregularly crushed, spherical, scaly, fibrous, rod-like, massive, powdery, In order to improve water absorption performance, it is more preferable that it is powdery.

The average particle diameter of the particles is not particularly limited, but is preferably 50 to 850 μm, and more preferably 60 to 400 μm. If it is larger than 50 μm, it becomes difficult for the water-absorbent resin powder to leak from the water-permeable sheet, and if it is smaller than 850 μm, the absorption speed when the neck towel absorbs water is good. Although there is no particular limitation on the particle size distribution, it is preferable to use a powder that has been pulverized so that particles in the range of 50 to 850 μm are 95% by mass or more. Here, the average particle diameter means the mass average particle diameter, the mass average particle diameter is plotted on the logarithmic probability paper of the particle size distribution of the cross-linked polymer on the horizontal axis is the particle diameter, the vertical axis is the content based on the mass, It is measured by a method for determining the particle size that occupies 50% of the total. For example, a sieve shaking method can be applied.

The water absorption capacity of the water absorbent resin is preferably 100 to 1000 times by weight. The water absorption ratio can be measured by the following method.
<Measurement method of water absorption capacity of water absorbent resin>
A sample of water-absorbent resin (sample amount: Xg) was placed in a nylon net bag (250 mesh), and the bag was immersed in excess water. After 60 minutes of immersion, the whole bag was pulled up in the air, allowed to stand and drained for 15 minutes, and then the mass (Yg) was measured to determine the water absorption capacity from the following formula. [The same operation as described above was performed using only a mesh bag, and the mass (Zg) of this amount was subtracted as a blank. ]
Water absorption magnification = (Y−Z) / X

The water absorption rate of the water absorbent resin is preferably 5 to 200 seconds, more preferably 5 to 100 seconds. When the water absorption speed is 5 seconds or more, blocking of the water-absorbent resins or the like is less likely to occur due to the humidity in the air at the time of creating the water-absorbing sheet, and the processability is good. It is preferable that the water absorption rate is 200 seconds or less because the water absorption rate when the neck towel is wet is sufficiently high and the water evaporation rate is also high, so that the cooling rate is also high.

The water absorption rate can be measured by the following method.
<Measurement method of water absorption rate of water-absorbing resin>
1. Put 50 mL of tap water in a 100 mL glass beaker and stir at 600 rpm using a magnetic stirrer (diameter (center portion: 8 mm, both ends: 7 mm), length: 30 mm fluororesin coated).
2. The sample 2.00 test sample is put into the vortex at once, and the time (seconds) from when the vortex disappears until the liquid level becomes horizontal is measured to obtain the water absorption speed.

The fixed amount of the water absorbent resin powder in the water absorbent sheet of the present invention is preferably 10 to 120 g / m ² , more preferably 30 to 100 g / m ² , and particularly preferably 40 to 80 g / m ² . When the fixed amount is 10 g / m ² or more, the water retention of the water-absorbing sheet is good, and when it is 120 g / m ² or less, the neck towel does not swell excessively when water is absorbed, and the cost performance in terms of performance and economy is high. It is good.

The fixed amount of the water-insoluble water-absorbing / water-retaining material in the water-absorbing sheet is preferably 7 to 480 g / m ² , more preferably 21 to 400 g / m ² , and particularly preferably 28 to 320 g / m ² . If the fixed amount is 7 g / m ² or more, the water-absorbent resin is less likely to fall down even if the neck towel is hung and dried, and if it is 480 g / m ² or less, the performance and economic cost performance are good. It is.

The ratio of the fixed amount of the water-absorbent resin and the water-insoluble water-absorbing / retaining material is preferably 1: 0.7 to 4.0, particularly preferably 1: 1 to 3.0, by weight. When the amount of the water-insoluble water-absorbing / retaining material is more than 0.7, water hardly floats on the surface of the towel when the neck towel absorbs water, and the water-absorbing resin does not easily fall down when the neck towel is hung and dried. If it is less than 4.0, the water-holding amount of the water-absorbing sheet in the neck towel is sufficient, and when using the neck towel, there is no sense of incongruity that the lump of water-insoluble water-absorbing / water-holding material hits the skin, and the cool time is long. . If the amount of the water-insoluble water-absorbing / retaining material is 1 to 3.0, the water-absorbing sheet in the neck towel is sufficient, and the neck towel can be used more comfortably. The water absorbent resin does not fall down when you do.

The weight ratio of the water-absorbent resin and the water-permeable base material is preferably 1: 0.5 to 3, particularly preferably 1: 0.8 to 2. When the amount of the water-permeable substrate is more than 0.5, when the neck towel is absorbed, it is difficult for water to float on the towel surface, and the neck towel is flexible and easy to handle.

The water absorbing sheet of the present invention is water permeable on at least one side. The other surface of the water absorbent sheet may be water-permeable or non-water-permeable. Preferably, both sides are water-permeable.

The water-absorbent sheet of the neck towel of the present invention is preferably made of water-absorbent resin powder using an adhesive or binder resin on one or both sides of a water-permeable substrate such as cloth (particularly preferably non-woven fabric) or paper. It is fixed together with an insoluble water-absorbing / water-retaining material, and particularly preferred is a water-insoluble water-absorbing water-absorbing resin that is sandwiched between water-permeable substrates such as paper and non-woven fabric and then embossed or needle punched.・ Integrated with water retaining material; Water-absorbent resin powder water is fixed together with insoluble water-absorbing / water-retaining material using adhesive or binder resin on one side of plastic film, and the above water-permeable base material is covered as it is or on one side For example, using cellophane or vinyl adhesive tape, spray the water-absorbent resin powder on the adhesive surface together with the water-insoluble water-absorbing / water-retaining material, or leave it unwoven Such as those fixed by press roll is covered with a water-permeable substrate and the like. Since these water-absorbing sheets are unlikely to prevent swelling of the water-absorbent resin powder due to water absorption, they can absorb and retain a large amount of water. Particularly preferred is a resin in which a water-absorbent resin is sandwiched and fixed together with a water-insoluble water-absorbing / water-retaining material by an embossing method. In the embossing method, the water-absorbent resin is firmly fixed by the base material, and the water-absorbent resin is less likely to fall down when the neck towel is suspended and dried. Further, if the paper is disintegrated by water to become a water-insoluble solid, the same effect can be obtained even if the water-insoluble water-absorbing / retaining material is not used or the amount thereof is reduced.

FIG. 1 is a cross-sectional view of a water absorbent sheet according to an embodiment. (A) is a water-absorbent sheet 4 which is obtained by spraying a water-absorbent resin powder 2 together with pulp 3 on a water-permeable substrate 1 and pressing it. (B) is a water-absorbing sheet 4 obtained by pressing a water-absorbing resin powder 2 together with pulp 3 between two water-permeable substrates 1. (C) is a laminated sheet in which water-absorbent resin powder 2 and pulp 3 are sandwiched between a water-permeable substrate 1 and a water-impermeable substrate 5 to absorb water.

  The size of the water absorbing sheet is not particularly limited. When the water absorbent sheet is installed in the neck towel, it may be cut according to the size of the neck towel and installed as a single sheet, or it may be folded and placed in several layers. Usually, it is preferable to put the water absorbent sheet in a neck towel and close the periphery by sewing or the like so that the water absorbent sheet does not come out. More preferably, the water absorbent sheet of the neck towel is sewn in the longitudinal direction so as to be divided in the width direction, and the water absorbent sheet is fixed to the neck towel.

Further known deodorants (for example, zeolite, charcoal, etc.), antibacterial agents (for example, quaternary ammonium salts, quaternary pyridinium salts, water absorbing resins, water permeable substrates, or both of these water absorbing sheets, TPN, silver colloid, etc.), fragrance (for example, fragrance with odor such as lavender, mint, etc.) may be included. If an antibacterial agent is blended, rot when left for a long time can be sufficiently suppressed.
EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, it is not limited to this.

(Production Example 1) (Production of water absorbent resin)
A 1 liter glass reaction vessel was charged with 76.6 g of sodium acrylate, 23 g of acrylic acid, 0.4 g of N, N′-methylenebisacrylamide and 295 g of deionized water, and the temperature of the contents was adjusted to 5 while stirring and mixing. Kept at ℃. After flowing nitrogen into the contents to make the dissolved oxygen amount 1 ppm or less, 1 g of 1% aqueous solution of hydrogen peroxide, 1.2 g of 0.2% aqueous solution of ascorbic acid and 2,2′-azobisamidinopropane dihydro Polymerization was started by adding 2.4 g of a 2% aqueous solution of chloride, and polymerization was carried out for about 5 hours to obtain a water-containing gel-like polymer having a water absorbent resin concentration of 25%. This was dried to obtain a water absorbent resin powder having an average particle diameter of 400 μm. Further, 360 g of water was added to 90 g of this powder to obtain a hydrous gel, 10 g of “Denacol EX-313” (glycerol polyglycidyl ether, manufactured by Nagase ChemteX) was added and kneaded, reacted at 140 ° C. for 3 hours, The kneaded product was dried at 90 ° C. under reduced pressure, pulverized with a pin mill, and then the particle size was adjusted so that the particle size of 50 to 750 microns was about 95% to obtain a water absorbent resin having an average particle size of 350 μm.

Examples 1-8, comparative example 1 [creation of a water absorbing sheet]
On a tissue paper having a width of 40 cm and a length of 70 cm, the total amount of the water-absorbent resin produced in Production Example 1 and fibrous pulp (1/2 by weight) is uniformly spread so as to be 150 g / m ^2. Then, a tissue paper of the same size was placed on it, and embossed from above to be integrated. This was slit so as to have a width of 8 cm and a length of 36 cm to prepare a water absorbent sheet (a) of the present invention.
Further, in the same manner as described above, as described in Table 1, the ratio of the water absorbent resin and the fibrous pulp was changed so that the total amount of the water absorbent resin and the fibrous pulp was 150 g / m ² . Water-absorbing sheets (b) to (h) and a comparative water-absorbing sheet (i) were produced.

Examples 9 to 16, Comparative Example 2 [Preparation of neck towel]
As shown in FIG. 2, a bag portion 7 having a length of 38 cm was sewn with a sewing machine at the center of a neck towel 6 having a width of 5 cm and a length of 86 cm. In the bag portion 7, the water-absorbing sheets (a) to (i) described above are folded in two vertically and sewn on the side surface and the center 8 in the length direction with a sewing machine, and the neck towels A to H of the present invention. And comparative neck towel I was made.

The neck towel is soaked in tap water for 10 minutes and then gently squeezed so that the water does not fall off. After use, in the room (about 20 ° C.), the neck towel was hung with one end facing up and air-dried for 3 days. The neck towel towel was cut into three equal parts in the longitudinal direction, and the total weight of the water-absorbent resin and pulp therein was measured. The results are shown in Table 1. The numerical value is an average value obtained by repeating four times five times. The uppermost part of the three parts was described as the upper side, the lowermost part as the lower side, and the central part as the center.
In addition, the number of people who felt a sense of incongruity that a lump of water-insoluble water-absorbing and water-retaining material hit the skin was described by having 10 people evaluate the feel when the neck towel was wet and wrapped around the neck. . At the same time, the time when the neck towel was wrapped around the neck and felt cold was measured in units of 30 minutes, and the average time was recorded.
The evaluation when the uneven distribution of the water-absorbent resin, the feel when using the neck towel, and the cold insulation time were comprehensively evaluated were indicated by ◎, ○, Δ, and ×.

As is clear from the above table, when the weight ratio of the pulp is more than 0.7, the neck towel is suspended after use and air-dried, and when it is more than 1.0, the bias is less. If it is less than 4.0, there is little uncomfortable feeling that a lump of water-insoluble water-absorbing / water-retaining material hits the skin when using a neck towel, and the cooling time is long. If it is less than 3.0, the feeling of discomfort is further reduced and the cooling time is also prolonged.

DESCRIPTION OF SYMBOLS 1 Water-permeable base material 2 Water-absorbent resin powder 3 Pulp 4 Water-absorbing sheet 5 Non-water-permeable base material 6 Neck towel 7 Bag part 8 Bag part length direction center

Claims (5)

    A water-absorbing sheet to be placed in a neck towel for cold insulation, wherein the water-absorbing sheet is a water-absorbing sheet in which at least a water-absorbing resin and a water-insoluble water-absorbing / water-holding material other than the water-absorbing resin are fixed to a water-permeable substrate. A water-absorbing sheet for a neck towel for cold insulation. The water-absorbing sheet for a cold-insulated neck towel according to claim 1, wherein the water-insoluble water-absorbing / water-retaining material is pulp. The water absorbing sheet for a neck towel for cold insulation according to claim 1 or 2, wherein the fixing method is an embossing method. A neck towel in which the water-absorbent sheet according to any one of claims 1 to 3 is inserted. A method of using a neck towel which is reused after being hanged and dried after the neck towel according to claim 4 has been used with water.

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