JPS60242801A - Shoe insole material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a shoe insole material used as a shoe material. More specifically, the present invention relates to a three-layer shoe insole material in which the intermediate layer is made of a resin film, and a woven fabric and a =-dolbunch nonwoven fabric are bonded to both sides 1111.

Conventional technology and its problems Conventionally, board-like sheets made of pulp resin solidified and compressed have been mainly used as shoe insole materials. In addition, recently, non-woven fabric is used as the base material, and resin-treated tubes are applied.
Used in some parts.

However, conventional shoe insole materials, especially board-like sheets made by solidifying pulp with resin and compressing it, have a low water absorption capacity and slow moisture release, making them prone to stuffiness and weight. There were problems with K, such as low bending resilience, easy breakage, and easy bending.

In addition, these board-like sheets and those made of non-woven fabric and treated with resin are soft and difficult to disperse stress, so in the case of competition shoes with metal fittings, it is difficult to attach the metal fittings. There are actual cases where it becomes like a protrusion and makes the foot feel worse.

Products made entirely of non-woven fabric and treated with resin have a problem in that the penetration (absorption) of the adhesive is large and it tends to be difficult to form the entire adhesive film layer, resulting in wide adhesion failure. For example, in the shoe manufacturing process using the adhesive method, when the shoe upper is hung, a hanging adhesive is also applied to the midsole material side in advance, but the adhesive layer is not formed because it soaks in so deeply. For this reason, even after the shoe upper is hung, the adhesion between the shoe insole material and the shoe upper is insufficient, causing it to peel or become distorted during the heat setting in the next process, which can be corrected or repaired. In order to prevent such accidents, care is often taken to form an adhesive film layer by applying two or three times.

Furthermore, those made entirely of non-woven fabric and treated with resin,
Because it is soft and easily buckled, there is a problem in that when the shoe upper is hung up, the toe part bends, making shoemaking operations difficult.

C1 Purpose of the present invention The purpose of the present invention is to improve the drawbacks of the conventional products. To provide a shoe insole material that provides comfortable wearing comfort without getting stuffy even when worn.

(2) Structure of the present invention The shoe insole material of the present invention includes an intermediate layer made of a resin film;
It is a laminated structure made of a woven fabric and a non-woven fabric bonded to both sides of the intermediate layer, and has a three-layer structure with a woven fabric layer on the sole side and a non-woven fabric on the shoe sole side.

FIG. 1 is a partial cross-sectional view showing an example of the three-layer shoe insole material of the present invention, which is composed of a resin film 1, a nonwoven fabric 2, and a woven fabric 3.

The resin film is preferably a thermoplastic synthetic resin such as polyethylene, bolyb-9-pyrene, ethylene-vinyl acetate resin, or nylon, which can be easily discharged and formed into a film using a film-forming machine, and is particularly compatible with nonwoven fabrics and textiles. It is desirable to have a material that can exhibit all its effects and has excellent flexibility and cold resistance. The optimal thickness of the resin film is 300 to 500 microns in terms of bending resilience and film formability. As the non-woven fabric, a needle-punched non-woven fabric is preferable, and as the material, synthetic fibers such as polypropylene, nylon, and polyester fibers are excellent in terms of moisture release (water) properties.

Further, polyester spunpond nonwoven fabric is desirable because of its high tear strength. The optimum fineness of the synthetic fiber is 1 to 5 deniers. The basis weight varies depending on the required product thickness, so it is set according to the thickness. In particular, it is desirable to completely impregnate the needle-punched nonwoven fabric with resin, which imparts hardness and has the effect of preventing fluffing and fluffing. In this case, the impregnating resin is usually acrylic resin,
Urethane resins, nitrile-butadiene copolymer resins, and the like are used. In particular, when bending rigidity (bending) is required, acrylic resins and urethane resins are excellent; in order to prevent puckering and fluffing, and to achieve the required hardness (stiffness), resin application is required to be rigid. 1 in terms of type
It is desirable to set it to 00% or more. The woven fabric is used for the purpose of facilitating the discharge forming operation of the resin film and for the purpose of sufficiently adhering the shoe insole material and the shoe upper when the shoe upper is hung in the shoe manufacturing process. There are no particular restrictions on the type of fabric, and any type of fabric can be used, but general K.

A thin material with a low weave density, such as cheesecloth or muslin, is preferable.

The three-layer shoe insole material of the present invention is preferably manufactured by the following method.

That is, a resin film is discharged and formed onto the fabric using an extruder type extrusion film forming machine. When forming this resin film, nonwoven fabrics, preferably needle-punched nonwoven fabrics that have been impregnated with resin in advance, are laminated, and while the resin film is in a molten state until solidified, pressure is applied to weld the entire surface.

The three-layer shoe insole material manufactured in this way is fully fused and has a sufficient anchoring effect with each other.
The main feature is that the layer does not peel off even during repeated bending tests.

The three-layer shoe insole material of the present invention uses the resin film layer to prevent the adhesive from seeping (absorbing) in the application process in which the entire suspension adhesive is applied during the shoe manufacturing process when the shoe upper is suspended. The adhesive film layer can be easily formed, and the fabric layer can improve the adhesive strength between the shoe insole material and the shoe upper leather. Nonwoven fabrics, especially needle punched nonwoven fabric layers,
A thick comb that absorbs the sweat you sweat when walking, and a comb that protects your feet.
improve.

The present invention employs a structure in which the woven resin film layer is on the sole side, but this is because the woven resin film layer on the sole side has greater bending resilience, prevents deformation, and provides a better fit for the foot. It depends on K.

Effects of the Kimoto Invention The three-layer shoe insole material of the present invention has appropriate hardness (stiffness), full bending resilience, and maintains mechanical properties such as sufficient tensile strength. As such, it met the important requirements of punching workability and shaping, and in actual shoe manufacturing tests, good results were obtained in all areas, including shoe upper leather hanging ability and adhesive strength.

The effects of the present invention can be summarized as follows.

(1) Light and has appropriate hardness (rigidity) and bending rebound,
It is hard to break and has a large stress distribution, making it comfortable to wear and easy to walk around in. In particular, in competition shoes with metal fittings, since the metal fittings do not have a protruding shape, they feel good on the feet and do not lose their shape.

(2) Compared to a board-like sheet made by solidifying bulb powder with resin and compressing it, it absorbs more water and has greater moisture release (water) properties.It is comfortable to wear when worn repeatedly. .

(3) Textile/resin film layer? By configuring it as the sole side of the shoe, it is easy to form an absorbent upper stopper and adhesive film layer after the adhesive is applied, and sufficient adhesive force is obtained between the shoe upper and the shoe insole material. Makes lifting the upper leather easier.

(4) Since it uses synthetic fibers and thermoplastic resins, it has excellent processing and heat setting properties, so it has good curlability, good shape retention, and especially does not lose its shape.

These effects are summarized in Table 1.

Go· -1 □l 1 =1 vinegar 1 Next, an explanation will be given using an example.

Example l.

Using an extruder-type extrusion film-forming machine, the thickness of ethylene vinyl acetate resin (vinyl acetate content: 10 inches) is 30 mm.
Preparation settings are made so that a 0μ resin film can be formed. During the discharge forming of this resin film, the resin film is previously inserted onto the fabric under the resin film to be discharge formed, and the resin film is discharged onto the fabric in all rows.

Needle-punch nonwoven fabric with resin-treated upper knot? The resin film is laminated on top of the resin film to be discharged, and while the resin film is still in a molten state, it is placed between two steam rolls with a total clearance of 0.7% so that the product thickness is 1.5X. t'' (steel rolls are not heated) for pressure welding.

The fabric used for this production was Sfu Muslin No. 4, and the needle-punch nonwoven fabric was polyester spunbond with a fineness of 3 denier and a basis weight of 150? /ffl' as all base materials, 9 = 1 of self-crosslinking acrylic resin and melamine resin
Fabric weight 520 after resin impregnation processing using mixed liquid
There were F/- ones all around.

The three-layer structure obtained by this manufacturing method is fully fused, has a sufficient anchoring effect with each other, and has a peeling strength that does not cause interlayer peeling even in repeated bending tests. Its characteristics are shown in Table 2.

In addition, using the three-layer structure obtained using this manufacturing method, we conducted a shoe-making test (Ir) on the processability, shapeability, and shoe-making process as a shoe insole material, and good results were obtained in all of them. Ta.

Ten thousand? 5! i: (1975)

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing an example of the three-layer shoe insole material of the present invention. 1: Resin film 2: Needle-punch nonwoven fabric (resin-impregnated product) 3: Textile Applicant: Toshi Co., Ltd., Sanfa Sobu Co., Ltd., Agent: Patent attorney Saito Armoki, J Patent attorney: Ryoji Kawase Pa. in

Claims (2)

[Claims] (1) A laminated structure consisting of an intermediate layer made of a resin film, and a woven fabric and a nonwoven fabric bonded to both sides of the intermediate layer, and an insole in which the sole side is a woven fabric layer and the shoe side is a nonwoven fabric. Material. (2) The shoe insole material according to claim (1), wherein the nonwoven fabric is a needle-punched nonwoven fabric made of synthetic fibers and is impregnated with a resin.