JPH0975111A - Interior material for footwear - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To develop an interior material for footwear, which has good moisture absorption and release properties, has a refreshing feeling to the touch, and has good heat retention and cushioning properties. SOLUTION: A soft polyurethane foam sheet 2 is made of a water-absorbing fiber such as a natural fiber or a water-absorption-treated chemical fiber and a fiber having a water-diffusing property such as a cross-shaped or L-shaped fiber cross section.
Needle punching is carried out to obtain a composite material 3, and a hydrophobic fiber 4 of acrylic, nylon or the like is joined and integrated on the foot contact side of the composite material 3 by quilting, welding or the like to form an interior material 1a for footwear. When the interior material 1a is used as, for example, an insole material for footwear, moisture such as sweat permeates through the hydrophobic fiber layer 4 to be absorbed and stocked in the soft polyurethane foam sheet 2 and the water-absorbent fiber, and the moisture diffusibility is also increased. The fibers are diffused and evaporation is promoted, and the hydrophobic fiber layer 4 on the contact surface is smooth and refreshing. Further, the soft polyurethane foam sheet 2 prevents the slippage in the footwear.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interior material for footwear, which is suitable as an interior material for footwear and has a sweat absorbing and quick drying property.

[0002]

2. Description of the Related Art Conventionally, as an interior material for clothing such as winter clothes, bedding, and footwear, a material having a high moisture absorbing / releasing property that absorbs sweat and dissipates it has been desired, for example, Japanese Patent Publication No. Sho 63-71.
Flexible composite materials such as those shown in No. 48, Japanese Patent Publication No. 7-5
There are known moisture absorbing / releasing water absorbing heat generating heat insulation products and the like as shown in 9762. In the former case, ultra-fine fibers with fine pores are needle-punched on a soft polyurethane foam sheet to increase moisture absorption and desorption by the ultra-fine fibers, while soft polyurethane foam sheet ensures cushioning and heat retention. I am trying to do it. In the case of the latter, a moisture-absorbing and releasing material is inserted between the outer material and the lining material, which have moisture-permeable and wind-proof properties, and other desired properties, to absorb the moisture generated by the human body and maintain the heat-retaining effect. I'm trying to put it out.

[0003]

By the way, as materials for the interior materials of footwear, especially resin shoes integrally molded, not only moisture absorption / release and heat retention but also, for example, refreshing touch, appropriate cushioning properties, etc. The characteristics of are also important.
Further, it is also required to have slip-proof property without causing a problem that the insole material is displaced or moved in the shoes as the user walks. From this point of view, all of the above-mentioned conventional techniques have room for improvement in the feeling of touch when they absorb moisture, and especially the latter Japanese Patent Publication No. 7-
In the case of No. 59762, there was a problem that when it was used as an insole material for footwear, it was easily displaced. Therefore, it is rich in moisture absorption and desorption, and also has good heat retention and cushioning properties. Moreover, even when it absorbs moisture, the side of the foot surface that comes into direct contact with the skin feels dry and has a refreshing feeling. Such an interior material for footwear having slip resistance has been desired.

[0004]

In order to solve the above-mentioned problems, the present invention provides a composite material according to claim 1, wherein a flexible polyurethane foam sheet is needle-punched with a water-absorbing fiber and / or a water-diffusing fiber. On the foot contact side,
The fiber layers having hydrophobicity were laminated. here,
Fibers having water absorbability include, for example, various natural fibers such as cotton, wool, and hemp, as well as a hollow fiber cross-section product name Aqualon (manufactured by Kanebo), Golux (manufactured by Mitsubishi Rayon),
Examples of the fiber having a hydrophilic group are Junica (manufactured by Unitika), Marvas (manufactured by Komatsu Seiren Co., Ltd.) and the like. For example, as shown in the following table which is an experimental value of water absorption rate (test by JIS BYREC method) It is a highly capable fiber.

[0005]

[Table 1]

Further, the water-diffusible fibers are, for example, fibers having a cross-shaped, L-shaped or C-shaped cross-section and having a high water-diffusive property due to capillary phenomenon or pipe diffusion effect. Examples of the product include Cool Mac (made by DuPont) having a cross-shaped fiber cross section, Sieve (made by Asahi Kasei Co., Ltd.), a product name having an L-shaped fiber cross section, Cooglan (made by Asahi Kasei). Then, as an experiment showing the characteristics of water diffusivity, the experimental values comparing the drying rates of water are as shown in the following table.

[0007]

[Table 2]

[0008] The hydrophobic fiber is a chemical fiber such as acrylic, nylon, polyester, etc., which has a property of being immiscible with water. For example, the fiber density is roughly woven so as to have a function of allowing water to permeate. In this case, the fibers themselves always provide a dry feel. And, the means for laminating the hydrophobic fiber layer on the composite material does not prevent water permeation such as quilting, high-frequency welder heat fusion, ultrasonic fusion, welding by heat fusion, point adhesion by adhesive, etc. The interior material is formed as a composite layer by joining and integrating by such a method.

As the composite material, it is preferable to needle-punch both a water-absorbing fiber and a water-diffusing fiber into a flexible polyurethane foam sheet, but only the water-absorbing fiber or the water-diffusing fiber is used. The fibers may be needle punched alone into the flexible polyurethane foam sheet.

When hydrophobic fibers are laminated on the foot contact side of such a composite material to be used as an interior material, moisture such as sweat emanating from the human body permeates the hydrophobic fibers and the soft porosity of the composite material is increased. The urethane foam sheet or the fiber having water absorbability is sucked, and at the same time, diffusion evaporation is promoted by the moisture diffusing fiber. Further, even when only the fibers having water absorbency are needle-punched into the flexible polyurethane foam sheet as the composite material, an effect of promoting evaporation can be expected due to the water diffusion action of the water absorbent fibers. The hydrophobic fiber layer, which comes into direct contact with the skin, is refreshing because it always has a dry feel, and the soft polyurethane foam sheet ensures heat retention and cushioning properties, and even when used as an insole material, soft polyurethane foam. The anti-slip property is exhibited by the frictional force of the seat, and there is no misalignment or movement, and there is no adverse effect on walking.

According to a second aspect of the present invention, a composite material composed of a water-absorbent fiber and / or a water-diffusible fiber and a flexible polyurethane foam sheet is provided on the foot contact surface side,
The fibers having hydrophobicity were needle-punched with high density. At this time, the hydrophobic fiber and the water-absorbent fiber and / or the water-diffusible fiber may be lightly needle-punched in advance, and the whole may be needle-punched by stacking this on a flexible polyurethane foam sheet. Water-absorbent fibers and / or water-diffusible fibers may be superposed on the polyurethane foam sheet, and hydrophobic fibers may be superposed on the polyurethane foam sheet, and the whole may be needle-punched at the same time. Further, it is preferable to use both the water-absorbent fiber and the water-diffusible fiber, but it is also possible to use only the water-absorbent fiber or the water-diffusible fiber. At this time, by increasing the hydrophobic fiber density on the foot contact surface side of the interior material, the foot contact surface side that directly contacts the skin can have a smooth feel.

Further, in claim 3, a water absorbent fiber layer is laminated on the outer skin side of the interior material according to claim 1 or 2. The water-absorbent fiber layer on the skin side enhances the ability to temporarily store water when a large amount of sweat is generated.

[0013]

Embodiments of the present invention will be described with reference to the accompanying drawings. Here, FIGS. 1 to 4 are cross-sectional views showing various structural examples of the interior material for footwear of the present invention. The interior material for footwear of the present invention has been developed as a material suitable for the interior material of footwear, has good moisture absorption and desorption, has a good heat retaining property, is refreshing to the touch even when sweating, and has a smooth feel. Even when used as, it exhibits slip resistance that is difficult to move in footwear.

That is, the interior material 1a for footwear of the first example shown in FIG. 1 has a water-absorbing fiber such as a natural fiber or a water-absorbing chemical fiber, and a water diffusion such as an L-shaped or cross-shaped fiber cross section. The flexible fiber is formed by needle-punching a flexible polyurethane foam sheet 2 to form a composite material 3, and a hydrophobic fiber layer 4 which is a knitted woven fabric of polyester, nylon or the like is laminated on the foot contact side of the composite material 3. Therefore, the hydrophobic fiber layer 4 has a knitting and weaving structure that allows water to pass therethrough. And as a preferable weaving structure, mesh knitting,
It is possible to use knitting cloth of half denier to 210 denier, such as kano, knit, tuck, russel and the like.
A woven fabric such as plain weave or twill weave can also be used.

When needle-punching the water-absorbent fibers and the water-diffusible fibers on the flexible polyurethane foam sheet 2, the water-absorbent fibers are laminated on the flexible polyurethane foam sheet 2, and the water-diffusible fibers are laminated on the needles. By punching, it is desirable to increase the density of the water-diffusing fiber on the foot contact surface side (upper side in the drawing) of the composite material 3. The composite material 3 and the hydrophobic fiber layer 4 are joined and integrated by, for example, joining means that secures quilting, welding, water permeability and moisture permeability.

When such an interior material 1a for footwear is placed on the inner surface of a shoe, moisture such as perspiration emanating from the human body permeates through the hydrophobic fiber layer 4 and quickly the soft polyurethane of the composite layer 3 is formed. The foam sheet 2 and the water-absorbent fibers are absorbed and stocked, and are diffused in a wide range by the capillary phenomenon of the water-diffusible fibers, the pipe diffusion effect, and the like to promote the evaporation action. At this time, the hydrophobic fiber layer 4 on the side of the foot contact surface is not sticky and has a smooth and refreshing feel. When used as an insole material, the soft polyurethane foam sheet 2 adheres to the outer skin of the footwear to increase the friction resistance, exhibiting slip resistance in the footwear, and preventing misalignment or movement. There is no adverse effect on walking without occurring.

Further, the fibers needle-punched onto the flexible polyurethane foam sheet 2 as the composite material 3 are preferably both water-absorbent fibers and water-diffusible fibers, but only water-absorbent fibers or water-diffusible fibers are used. You may choose to. Then, even when only the water-absorbent fiber is used, the evaporation can be expected to be promoted by the water diffusion action of the water-absorbent fiber.

Next, the interior material 1 for footwear of the second example shown in FIG.
b is a flexible polyurethane foam sheet 2 on the foot contact side of a composite material 3 in which water-absorbent fibers and water-diffusible fibers are composited,
It is a structural example in which hydrophobic fibers are needle-punched with a large density. The means for increasing the density of the hydrophobic fibers on the foot contact surface side is, for example, by adjusting the number of needle punch sticks. The touching side that comes into direct contact with the skin has a smooth feel. Also in this case, similar to the first example, the soft polyurethane foam sheet 2 and the water-absorbent fibers absorb and stock water, and the water-diffusible fibers promote diffusion and evaporation of water.

In this case, the hydrophobic fiber, the water absorbing fiber and the water diffusing fiber are lightly needle punched beforehand,
This may be superposed on the flexible polyurethane foam sheet 2 and needle-punched as a whole, or the flexible polyurethane foam sheet 2 may be superposed with water-absorbing fibers and water-diffusing fibers, and hydrophobic fibers are placed on the foot contact side. Alternatively, the whole may be needle punched at the same time. Also in this case, the stacking order before needle punching is preferably such that the water-absorbent fibers and the water-diffusing fibers are provided on the flexible polyurethane foam sheet 2 and the hydrophobic fibers are provided on the upper side (foot contact side) thereof. In addition, the water-absorbent fiber and the water-diffusible fiber,
As in the above example, the fibers on either one side may be used.

Next, the interior material 1 for footwear of the third example shown in FIG.
c is a composite layer obtained by laminating a water-absorbent fiber layer 5 such as a natural fiber or a water-absorbing chemical fiber on the outer skin side of the footwear interior material 1a shown in FIG. 1 to form a composite layer. The water-absorbent fiber layer 5 is joined and integrated by a joining means that ensures water permeability. Further, the interior material 1d for footwear of the fourth example shown in FIG.
2 is a composite layer obtained by laminating a water-absorbent fiber layer 5 such as a natural fiber or a water-absorbing chemical fiber on the outer skin side of the footwear interior material 1b shown in FIG. The fiber layer 5 is joined and integrated by a joining means ensuring water permeability. And the interior materials 1 for footwear of these 3rd example and 4th example
In c and 1d, a large amount of water can be stocked by the water-absorbent fiber 5, and even if a large amount of water is absorbed, there is no problem that the water overflows to the contact surface and becomes sticky. Therefore, it is suitable as an interior material for footwear.

The third and fourth examples of FIGS. 3 and 4 are
For example, when used as an insole material, the slip resistance is slightly inferior to the configurations of the first and second examples, but the slippage of the flexible polyurethane foam sheet 2 sandwiched between the two prevents the slippage from occurring as compared with the conventional case.

[0022]

As described above, the interior material for footwear of the present invention is
In Claim 1, since a fiber layer having hydrophobicity is laminated on the contact surface side of a composite material obtained by needle-punching a fiber having water absorbability and / or a water diffusibility into a flexible polyurethane foam sheet, Moisture such as sweat emanating from the human body permeates the hydrophobic fibers and is absorbed by the soft polyurethane foam sheet of the composite material or the fibers having water absorbability, and at the same time, diffusion evaporation is promoted by the moisture diffusing fibers. Furthermore, due to the diffusion of water, the heat of vaporization vaporization occurs,
It is possible to diffuse the temperature rise due to the frictional heat between the foot surface and the lining material generated during walking in the footwear. The hydrophobic fiber layer, which comes into direct contact with the skin, always has a dry feel and thus has a refreshing feeling, and is extremely excellent in sweat absorption and quick drying. Moreover, the soft polyurethane foam sheet ensures heat retention and cushioning. Further, even when used as an insole, the soft polyurethane foam sheet exhibits slip resistance in footwear, does not cause displacement, movement, etc. and has no adverse effect on walking.

Further, as in claim 2, a fiber having a water absorbing property and / or a fiber having a water diffusing property and a fiber having a hydrophobic property on the foot contact side of the composite material made of a flexible polyurethane foam sheet are high in density. Even if the needle punching is performed, the hydrophobic fibers on the foot contact surface side make the foot contact surface feel dry, and the same effect as described above is achieved. When a fiber layer having water absorbency is laminated on the outer skin side as in claim 3, a large amount of water can be absorbed and stocked. The sticky feeling on the feet can be eliminated.

[Brief description of drawings]

FIG. 1 is a sectional view of a first structural example of an interior material for footwear of the present invention.

FIG. 2 is a sectional view of a second configuration example of the interior material for footwear of the present invention.

FIG. 3 is a cross-sectional view of a third configuration example of the interior material for footwear of the present invention.

FIG. 4 is a sectional view of a fourth configuration example of the interior material for footwear of the present invention.

[Explanation of symbols]

1a, 1b, 1c, 1d ... Interior material for footwear, 2 ... Soft polyurethane foam sheet, 3 ... Composite material, 4 ... Hydrophobic fiber layer, 5 ... Water absorbing fiber layer.

Claims (3)

[Claims] 1. A footwear in which a hydrophobic fiber layer is laminated on the contact surface side of a composite material obtained by needle-punching a soft polyurethane foam sheet with water-absorbent fibers and / or water-diffusible fibers. Interior material. 2. A hydrophobic material is densely needle-punched on the contact surface side of a composite material composed of a water absorbent fiber and / or a water diffusible fiber and a flexible polyurethane foam sheet. Interior material for footwear. 3. An interior material for footwear, comprising a fiber layer having water absorbability laminated on the outer skin side of the interior material for footwear according to claim 1 or 2.