JP3115809B2 - High moisture absorption / release laminated material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a highly moisture-absorbing and releasing laminated material suitable as a backing material for sports shoes, a backing material for hats, gloves and the like.

[0002]

2. Description of the Related Art Hitherto, as this kind of backing material, various laminated materials having hygroscopicity, air permeability, water absorption / quick drying, antibacterial / antifungal properties, deodorizing properties, etc. have been proposed (for example, See Japanese Utility Model Publication No. Sho 63-45924 and Japanese Utility Model Publication No. 2-3283). However, each of the laminated materials has advantages and disadvantages, and has not always been sufficiently satisfactory.

[0003]

DISCLOSURE OF THE INVENTION The present invention has been made in view of such circumstances, and has a good hygroscopic property and a good moisture releasing property, and also has an antibacterial / antifungal property and a deodorizing function. Type polyacrylate fiber (JP-A-5-132858)
The present invention aims to provide a highly moisture-absorbing and desorbing laminated material having excellent hygroscopicity, water-absorbing property and quick-drying property by utilizing the fiber for the intermediate layer.

[0004]

In order to achieve the above object, the laminated material of the present invention is made of a hydrophobic fiber or a hydrophobic fiber selected from polyester, polyethylene, polypropylene, acrylic and polyvinyl chloride. A surface layer formed of a woven or knitted fabric made of a mixed fiber of the above, and a woven or knitted fabric or a nonwoven fabric of a hydrophilic fiber or a mixed fiber of hydrophilic fibers selected from rayon, polynosic, cupra, cotton, and hemp At a temperature of 20 degrees
Moisture absorption rate when humidity is alternately changed to 90% and 45%
However, when left in an environment with an environmental humidity of 90%, the moisture absorption
Lower% becomes equilibrium reached, and environmental humidity of 45%
When crosslinked, a crosslinked polyacrylate fiber having a high moisture-releasing property to release moisture up to a moisture absorption rate of 27% or an intermediate layer of a batting or a nonwoven fabric containing the crosslinked polyacrylate fiber is interposed, and these are interposed between a surface layer and an intermediate layer. The layer and the backing layer are laminated, and are partially integrated by spot fusion or line fusion by welding.

[0005] Further, the laminated material of the present invention has a structure in which an intermediate layer of a pile fabric composed of a hydrophobic fiber and a tightening thread alternately changes humidity at 90 ° C to 90% and 45%.
Moisture absorption rate in the atmosphere of 90% environmental humidity
When left undisturbed, the moisture absorption reaches 60% and reaches an equilibrium state, and
When the environmental humidity is reduced to 45%, moisture is absorbed to a moisture absorption rate of 27%. A crosslinked polyacrylate fiber having a high moisture release property or a web made of a fiber containing the crosslinked polyacrylate fiber is interposed. A pile layer is formed on the surface layer, and a woven or knitted fabric or a non-woven fabric made of hydrophilic fibers or blended fibers of hydrophilic fibers is formed on the back surface of the pile fabric formed by fixing the web to the back knitting layer with a fastening yarn. And a layered and integrated backing layer. Also in this case, it is preferable that the pile fabric and the backing layer are laminated and partially welded by point welding or line welding to be integrated.

The hydrophobic fiber is a fiber selected from polyester, polyethylene, polypropylene, acrylic, and polyvinyl chloride, and the hydrophilic fiber is selected from rayon, polynosic, cupra, cotton, and hemp. To be selected as appropriate.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a highly moisture-absorbing and desorbing laminated material 1 according to claim 1 of the present invention.
And a backing layer 3 with an intermediate layer 4 interposed therebetween. These layers are laminated and partially integrated by spot fusion or wire fusion 5 by welding.

The outer layer 2 is made of a woven or knitted fabric composed of hydrophobic fibers selected from polyester, polyethylene, polypropylene, acrylic, polyvinyl chloride and the like, or a mixed fiber of the hydrophobic fibers and other fibers. Have been.

The backing layer 3 is made of a nonwoven fabric or a woven or knitted fabric made of a hydrophilic fiber selected from rayon, polynosic, cupra, cotton, hemp, or a mixed fiber of the hydrophilic fiber and other fibers. Have been.

The intermediate layer 4 is composed of a cotton-like layer made of a crosslinked polyacrylate fiber having high moisture absorption and moisture release properties. As the crosslinked type polyacrylate fiber,
Temperature as moisture absorption and desorption rate of crosslinked polyacrylate fiber
When the humidity is alternately changed to 90% and 45% at 20 degrees
When left in an atmosphere with an environmental humidity of 90%
Equilibrium when the humidity reaches 60% and the environmental humidity is 4
Use a material that releases moisture up to 27% when it is reduced to 5%
You.

FIG. 4 shows an isothermal moisture absorption curve of the crosslinked polyacrylate fiber used in the present invention and other general fibers. The crosslinked polyacrylate fiber is different from other natural fibers or synthetic fibers. It can be seen that the material is more hygroscopic than fiber. In particular, in a humidity atmosphere where the relative humidity exceeds 40%, it has a very high hygroscopic property, so it is a material that exhibits sufficient hygroscopicity when used in areas with a large amount of perspiration, such as inside sports shoes and sportswear. It is.

FIG. 5 shows the rate of moisture absorption and desorption of the crosslinked polyacrylate fiber used in the present invention.
At a temperature of 20 ° C., the change in the moisture absorption was measured when the humidity was alternately changed to 90% and 45% every 90 minutes. If left in an atmosphere with an environmental humidity of 90%, the moisture absorption rate is 60% in about 40 minutes.
When the environmental humidity is reduced to 45%, moisture is released to a moisture absorption rate of 27% in a short time of about 40 minutes. In addition, even if these series of operations are repeated, moisture absorption,
And little decrease in moisture release.

Accordingly, it is understood that the crosslinked polyacrylate fiber is a material having excellent moisture absorption and excellent moisture release.

In the laminated member 1 according to the present invention, the surface layer 2, the backing layer 3 and the intermediate layer 4 are laminated, and are partially welded by spot welding or line welding 5 to be integrated. The welding process can be appropriately selected from known welding methods such as a high-frequency welding method and an ultrasonic welding method.

FIG. 2 shows a highly moisture-absorbing and releasing laminated material 1 'according to claims 2 to 4 of the present invention. The laminated material 1' comprises a pile yarn 8 made of hydrophobic fiber, At a temperature of 20 degrees, the pile 4 is
Moisture absorption when the degree is alternately changed to 90% and 45%
However, when left in an environment with an environmental humidity of 90%, the moisture absorption rate becomes 60%.
% To reach an equilibrium state and reduce the environmental humidity to 45%.
And a web 6 made of a crosslinked polyacrylate fiber or a fiber containing the crosslinked polyacrylate fiber having a high moisture release property that releases moisture up to a moisture absorption rate of 27%. And the web 6
Fabric 1 fixed to the back knitted fabric layer 10 with a tightening thread 9
1 on the back, rayon, polynosic, cupra, cotton,
A backing layer 3 formed of a woven or knitted fabric or a nonwoven fabric made of a hydrophilic fiber selected from hemp and the like or a blend fiber of the hydrophilic fiber is laminated, and partially subjected to spot fusion or wire fusion by welding. It is one that is worn and integrated.

The pile fabric 11 is formed by penetrating a web 6 as an intermediate layer 4 made of the crosslinked polyacrylate fiber or a fiber containing the crosslinked polyacrylate fiber with a pile yarn 8 and a fastening yarn 9. A fabric in which a knitted lube is formed on the surface side with the pile thread 8 and the web 6 is sewn down with the fastening thread 9 and fixed to the back knitted fabric layer 10. The knitted lube on the surface side of the pile cloth 11 protrudes greatly as shown in the figure, and forms the outer layer 2 composed of a so-called pile layer 7. The pile thread 8 and the fastening thread 9 used for the pile fabric 11 are made of hydrophobic fibers selected from polyester, polyethylene, polypropylene, acrylic, polyvinyl chloride, and the like.

The backing layer 3 is laminated on the back side of the pile fabric 11 formed as described above, that is, on the side of the back knitting layer 10, and is integrated by spot welding or line welding by welding. . The welding process can be appropriately selected from known welding methods such as a high-frequency welding method and an ultrasonic welding method.

FIG. 3 shows the results of a water-absorbing and drying test performed on the laminated material 1 having the above structure. The test was performed by the following method.

That is, a watch glass having a diameter of 10 cm is prepared, and the cloth used for the surface layer 2, the cloth used for the intermediate layer 4, and the cloth used for the lining layer 3 are cut into 5 cm square sample pieces and laminated. To create the same state as the unfused part.

The sample pieces thus laminated are placed on the watch glass with the surface layer 2 facing upward, and a predetermined amount of distilled water is dropped from the surface layer 2 side. When the dripping is completed, the watch glass is also placed on the surface layer 2 to prevent evaporation of water. Taking the time when the dropping was completed as 0 minute, the sample piece was taken out every predetermined time, quickly separated into three layers, and each of the weights was measured. To hold. Do this for 1 minute, 2 minutes, 5 minutes
FIG. 3 shows the results of measuring the weight change every 10 minutes and recording the weight change.

As can be seen from FIG. 3, the distilled water passes through the surface layer 2 and the intermediate layer 4 and is absorbed by the lining layer 3 immediately after the dropping. 3 shows that it is absorbed. Although some water remains in the surface layer 2, it is gradually absorbed by the intermediate layer 4, and after 5 minutes, it is almost in an equilibrium state. On the other hand, despite the fact that the middle layer 4 has absorbed moisture from the surface layer 2, it has almost no change in weight because it has released moisture to the lining layer 3, and is in an almost equilibrium state after 5 minutes. From these facts, it can be understood that the moisture in the surface layer 2 is instantaneously absorbed and diffused into the lining layer 3, and the surface layer 2 is always kept in a dry state.

The case where the laminated material 1 or 1 'constructed as described above is used as a backing material for sports shoes or other shoes will be described.

The laminated material 1 or 1 ′ is cut into an appropriate shape, sewn with an upper material or the like so that the outer layer 2 faces the inside of the shoe to form an upper of the shoe, and a hanging step.
Completed as shoes through the bottoming process.

Although it is known that a large amount of feet sweat in shoes, the moisture due to sweating can be classified into a liquid state and a vapor state. The laminated material 1 or 1 'according to the present invention can release the moisture in the shoe to the outside regardless of the liquid phase or the gas phase.

In other words, the water content of the liquid phase will be described. The water content of the liquid phase condensed in the shoe is not retained in the surface layer 2 because the surface layer 2 which is in direct contact is made of hydrophobic fibers. It is absorbed by the middle layer 4 having high moisture absorption and desorption properties by capillary action, and is quickly released and absorbed by the lining layer 3 made of hydrophilic fibers. The moisture absorbed by the lining layer 3 is quickly released to the outside by capillary action and evaporation and diffusion. Therefore, the outer layer 2 which is in direct contact with the foot is always kept in a dry state, tackiness and unevenness inside the shoe are eliminated, and a comfortable wearing feeling is obtained. In particular, the fibers are densely packed in the part 5 which is partially fused by the welding process, and the wicking performance (suction capability) is dramatically increased. For this reason, by increasing the area of the fused portion in a portion of the foot where a large amount of sweat is secreted, the moisture due to perspiration can be effectively sucked up, diffused and released to the outside, and the performance can be further improved. Furthermore, if the direction of the fusion line is formed so as to gather from the inside of the shoe to the mouth portion of the shoe, the moisture sucked up along the fusion line is forcibly collected to the opening portion of the shoe, and the effective effect is obtained. Will be released.

Next, the gaseous phase moisture will be described. The gaseous phase moisture generated in the shoe passes through the surface layer 2 and is quickly absorbed by the intermediate layer 4. At this time, since the surface layer 2 is formed of hydrophobic fibers, moisture is not retained in the surface layer 2. The moisture absorbed by the mid layer 4 is sequentially released to the lining layer 3 made of hydrophilic fibers, and the feeling of unevenness inside the shoe is reduced.

On the other hand, it is also possible to increase the commercial value by variously changing the design of the above-mentioned fused portion 5. Further, when the surface layer 2, the intermediate layer 4 and the backing layer 3 are integrated by sewing, there is a risk of causing discomfort such as occurrence of thread breakage due to friction, sticking of water due to retention of water in the sewing thread, Such inconveniences can be all solved by partial fusion by welding.

The above is the laminated material 1 or 1 'according to the present invention.
Was used as the backing material for shoes, but the laminated material 1 or 1 'was used as a lining material for gloves and hats worn on the hands and head with much sweating, or for various sports such as wristbands and bandanas. It can be used for supplies.

[0030]

As described above, the laminated material according to the present invention has a high hygroscopicity and a high hygroscopicity, and the moisture that has passed through the hydrophobic surface layer is quickly absorbed by the intermediate layer, and the hydrophilic property is further improved. It is absorbed by the lining layer and is sequentially diffused and released to the outside, so that it is extremely effective as a material for shoe upper lining materials, lining materials for gloves and hats, and other various sporting goods.

In particular, since the crosslinked polyacrylate fiber constituting the intermediate layer has both antibacterial, antifungal and deodorant properties, the laminated material of the present invention can be used as a top of sports shoes that often sweats when worn. Ideal as backing material.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view of a highly moisture-absorbing and releasing laminated material according to the present invention.

FIG. 2 is a longitudinal sectional front view of a main part showing another embodiment.

FIG. 3 is a diagram showing the moisture absorption / release performance.

FIG. 4 is a diagram showing the moisture absorption performance of a crosslinked polyacrylate fiber.

FIG. 5 is a diagram showing the moisture absorption / release performance of a crosslinked polyacrylate fiber.

[Explanation of symbols]

 Reference Signs List 1, 1 'laminated material 2 outer layer 3 backing layer 4 intermediate layer 5 fused portion 6 web 7 pile layer 8 pile thread 9 fastening thread 10 back knitting layer 11 pile fabric

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-7-3502 (JP, A) JP-A-5-132858 (JP, A) JP-A-6-93548 (JP, A) JP-A-3-3 146761 (JP, A) Japanese Utility Model 2-25581 (JP, U) Japanese Utility Model 63-102794 (JP, U) Special Publication 8-503746 (JP, A) Special Publication 8-503745 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) A41D 31/00 A43B 1/00-23/30 B32B 5/26

Claims (4)

(57) [Claims] 1. A surface layer formed of a woven or knitted fabric made of hydrophobic fibers or a mixture of hydrophobic fibers selected from polyester, polyethylene, polypropylene, acrylic, and polyvinyl chloride, and rayon, polynosic,
A humidity of 90% at a temperature of 20 ° C. between a woven or knitted fabric or a non-woven fabric made of a hydrophilic fiber or a mixed fiber of hydrophilic fibers selected from cupra, cotton, and hemp.
And 45% alternately change the moisture absorption rate to the environmental humidity
When left in an atmosphere of 90%, the moisture absorption reaches 60% and becomes flat.
When the environment becomes equilibrium and the environmental humidity is reduced to 45%, the moisture absorption rate
A crosslinked polyacrylate fiber having a high moisture release property capable of releasing moisture up to 27% or an intermediate layer of a batting or nonwoven fabric containing the crosslinked polyacrylate fiber is interposed, and these are used as a surface layer, an intermediate layer and a backing layer. Highly moisture-absorbing and releasing laminated material that is laminated and partially fused or welded together by welder processing. 2. An intermediate layer of a pile fabric composed of a pile yarn composed of a hydrophobic fiber and a tightening yarn is subjected to humidity at a temperature of 20 degrees.
Is alternately changed to 90% and 45%.
When left in an atmosphere with an environmental humidity of 90%, the moisture absorption rate becomes 60%
Reaches equilibrium and reduces environmental humidity to 45%
And a web of a crosslinked polyacrylate fiber or a fiber containing the crosslinked polyacrylate fiber having a high moisture release property of releasing moisture up to a moisture absorption rate of 27%, to form a pile layer in the surface layer, On the back surface of a pile fabric in which the web is fixed to the back knitting layer with a fastening thread, a backing layer formed of a woven or knitted fabric or a nonwoven fabric made of hydrophilic fibers or a blended fiber of hydrophilic fibers is laminated and integrated. Moisture-absorbing laminated material. 3. The fiber according to claim 2, wherein the hydrophobic fiber is a fiber selected from polyester, polyethylene, polypropylene, acrylic and polyvinyl chloride, and the hydrophilic fiber is rayon. The high moisture absorbing / releasing laminated material according to claim 2, which is a fiber selected from polynosic, cupra, cotton, and hemp. 4. Stacking the pile fabric and the backing layer,
The highly moisture-absorbing and releasing laminated material according to claim 2 or 3, wherein the laminated material is partly welded or line-welded by welding to be integrated.