JP4886197B2 - Waterproof shoes and manufacturing method thereof - Google Patents

Description

The present invention relates to a waterproof shoe and a manufacturing method thereof.
In the manufacture of conventional cemented shoes, the present invention pays attention to the bonding structure and manufacturing method for the insole material when the upper material is suspended, and has a simple structure, excellent workability, and improved waterproof function. Provide shoes.

In the conventional bonded structure of the waterproof shoe suspension part in the cemented method, the waterproof / breathable film layer and the lining material of the upper cover material laminated with the waterproof / breathable film layer on the back side of the front cover material. A manufacturing method (JP 2002-153301) or a hot melt bonding (JP 8-299015) in which a suspended edge that protrudes from the peripheral edge of the upper shell material is bonded to the midsole by an adhesive. Often used.

As a gasket method, it is shielded with a waterproof nonwoven film or a polyester nonwoven fabric coated with a waterproof thermoplastic polymer (Japanese National Standard Hei 9-500295). In this case, the amount of adhesive applied between the upper and the bottom material There is a problem in workability such as uniformity.
Moreover, in order to consider the adhesiveness with the shoe sole material, it is conceivable that by performing the buffing operation of the hanging edge, the strength of the upper material is lowered and the waterproof function is lowered due to the damage of the waterproof moisture-permeable film.
Further, in the upper material when suspended, wrinkles due to distortion occur in the curved portion of the last, and unevenness occurs during bonding.
Similarly, in the method of filling the gap between the shell material and the bottom material with a highly fluid adhesive (Japanese National Standard Heisei 10-507380), problems such as adhesion and prolonged and complicated work will occur. Conceivable.

In the former cover material in which a waterproof layer is laminated on the back surface of the conventional upper cover material and the lining material is overlaid, the waterproof breathable film layer and the rim of the lining material have a suspended edge that protrudes from the periphery of the upper cover material. When a waterproof film or the like is bonded as a gasket method after bonding to the bottom material, water may be transferred to the mid-sole material through the upper shell material by capillary attraction and may penetrate into the shoe. .

In order to eliminate the phenomenon of shifting to the insole material through the upper shell material by capillary attraction and penetrating into the inside of the shoe, vinyl chloride, polyurethane, fluorine-based synthetic resin, rubber, etc. are applied to the bottom surface of the insole material or these A waterproof midsole material is used to laminate the film (Japanese Patent Application Laid-Open No. 8-196305).

Japanese Patent Laid-Open No. 2002-153301 JP 08-299015 A Japanese Patent Laid-Open No. 08-196305 Japanese National Patent Publication No. 10-507380 Japanese Translation of National Publication No. 09-500295

The present invention eliminates these drawbacks and provides a waterproof shoe with a simple structure and improved waterproof function in the manufacture of a cemented waterproof shoe in which the upper is suspended in the last and bonded to the sole. It is what.

The present invention provides a waterproof shoe of a cemented method in which a waterproof / breathable film layer is laminated on the back surface of a front cover material, and the upper cover material with a lining material is suspended, lined, and bonded to the shoe sole. A waterproof shoe having a structure using an insole material in which a waterproof low-melting-point thermoplastic resin layer having a certain property and self-adhesive property is laminated on the entire surface to a certain thickness.
Then, an insole material in which a low melting point thermoplastic resin layer is entirely laminated to a certain thickness is prepared in advance, and the upper material is suspended and lined, and at least the waterproof low melting point thermoplastic resin layer hitting the suspended edge A waterproof shoe and a method of manufacturing the same are provided, in which a shell material and an insole material are welded and joined.

The front cover material is a material such as natural leather, artificial leather, or fabric.
The inner bottom material is formed of a nonwoven fabric, synthetic resin, pulp board, rubber, leather board or a laminate or intermediate of two or more of these.

  Waterproof low-melting point thermoplastic resin is made of ethylene vinyl acetate, polyurethane, polypropylene, etc., has a melting point of 70-120 ° C, and resists bending when worn by good water resistance, chemical resistance, stretchability and elasticity. The waterproof property is maintained for a long time.

The laminate of the waterproof low-melting-point thermoplastic resin to the bottom material has a thickness of about 0.5 to 3.0 mm, and when hung it is covered with a waterproof / breathable film layer on the back of the upper shell material and a lining material. It can be considered that the material penetrates into the upper material by melting, and prevents water from permeating the upper material damaged by the buffing work.
Lamination of the waterproof low-melting point thermoplastic resin to the bottom material is not the whole, but only a certain width of the peripheral part of the edge with a constant thickness. Even in the configuration of forming the film material, it is conceivable to prevent the penetration of water.

  Due to the self-adhesive property of waterproof low-melting point thermoplastic resin, it is waterproof against the occurrence of wrinkles when the upper is covered with a waterproof / breathable film layer laminated on the back of the conventional front and back. It is considered that unevenness due to strain can be eliminated by penetration and coating with a low-melting point thermoplastic resin, and the adhesion of the shoe sole can be improved.

  In the conventional process, after the upper material is suspended and bonded, there is a work in which a high-fluidity sealing material is filled in the gap between the suspended edge and the midsole material. If used, a sealing effect is expected, and the work itself can be simplified and the work time can be shortened.

  Furthermore, in shoes that require a waterproof function, it is considered that the sealing method is further improved and the waterproof performance is excellent by using a gasket method and suspending a waterproof low-melting point thermoplastic resin sheet and shielding the entire edge.

    The waterproof shoe of the present invention and the method for manufacturing the same are focused on the adhesion structure to the midsole material and the manufacturing method when the upper material is suspended in the manufacture of the cemented shoe, and the waterproof material having a low melting point is waterproofed to the midsole material. Lamination of resin about 0.5 to 3.0mm, self-adhesion by melting, variation due to the process of applying the conventional adhesive, and the gaps and wrinkles of the upper material due to wrinkles of the upper material when suspended It is considered that the reduction of the waterproofing effect due to the buffing work can be improved by the penetration of the waterproof low melting point thermoplastic resin, the work process can be simplified, the working time can be shortened, and the waterproof performance can be improved.

When a non-woven fabric is used as an insole material, the water resistance (JIS L 1092 hydrostatic pressure method) shows a very low value, and no substantial waterproofing is observed due to the capillary action of the fibers.
However, when the waterproof shoes embodying the present invention were verified, it was confirmed that the water-resistant performance was greatly improved, and that the water-resistant pressure increased in correlation with the increase in the thickness of the laminate.

In addition, in terms of water resistance, laminating a waterproof low-melting point thermoplastic resin layer also reduced the capillary action of the fibers and confirmed the effect of preventing water penetration.
In addition, although pulp boards and leather boards show an appropriate value for instantaneous water pressure, water permeation remarkably occurs over time due to capillary action.

  As a waterproof low melting point thermoplastic resin, an intermediate bottom material made by laminating ethylene vinyl acetate to a non-woven fabric intermediate bottom material is used as a simple test so that the water level is higher than the bonding part of the shoe upper material and the bottom material. Even when immersed in the set water tank for 24 hours, water leakage from the bonding portion between the upper and the bottom of the shoe was not confirmed.

Furthermore, it is considered that it is possible to provide a waterproof shoe having an excellent waterproof function by completely filling a gap into which water penetrates by covering the entire suspended edge with a waterproof low melting point thermoplastic resin sheet.
As described above, the technical effect of extremely high waterproofness is remarkable.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a cover material (10) in which a waterproof / breathable film layer (2) is laminated on the back surface of a cover material (1) and a lining material (3) is overlaid with a waterproof low melting point thermoplastic resin layer (4). 2) shows a step before bonding to the laminated bottom material (5).
That is, a material obtained by previously stacking the waterproof and moisture permeable film layer (2) and the lining material (3) as the upper material (10) as the upper material (10).
On the other hand, a waterproof low-melting point thermoplastic resin layer (4) is laminated on the entire back surface of the midsole (5).
Since the waterproof low-melting point thermoplastic resin layer (4) is uniformly laminated with a certain thickness, the whole bottom material (5) has the same thickness.
The “constant thickness” of the waterproof low-melting point thermoplastic resin layer (4) means a constant thickness that can include the thickness of the suspended upper material (10), and the upper cover is included in the constant thickness. It is the thickness by which the suspended portion of the material (10) is embedded without being exposed.
Although it does not thicken more than necessary, the waterproof low-melting point thermoplastic resin layer (4) is 0.5 to 3.0 mm.
Then, the upper material (10) is suspended and bonded to the waterproof low-melting point thermoplastic resin layer (4) of the midsole material (5).

FIG. 2 shows a cover material (10) obtained by laminating a waterproof / breathable film layer (2) on the back surface of a lining material (3) on a back cover material (1), and a waterproof low-melting-point thermoplastic resin layer ( FIG. 4 is a cross-sectional view of a waterproof shoe that is heat-set and self-adhered after being suspended in a midsole (5) laminated with 4).
The waterproof low-melting point thermoplastic resin layer (4) is melted at a predetermined melting point and has self-adhesiveness, and can be adhered and maintained without special measures.

FIG. 3 shows a cover material (10) obtained by laminating a waterproof / breathable film layer (2) on the back surface of a lining material (3) on a front cover material (1), a waterproof low-melting-point thermoplastic resin layer ( The main part of the waterproof shoe after being hung on the midsole (5) laminated with 4), heat-set and self-adhering, and then covered with a waterproof low melting point thermoplastic resin sheet (6) using the gasket method It is sectional drawing.

  As shown in FIG. 1, an insole material (5) in which a waterproof low-melting point thermoplastic resin layer (4) is laminated on the entire surface with a constant thickness (1 mm) is prepared, while on the back surface of the upper shell material (1) The upper cover material (10) which laminated | stacked the waterproof moisture-permeable film layer (2) and laminated | stacked the lining material (3) was prepared.

The waterproof low-melting-point thermoplastic resin layer (4) is an organic thermoplastic polymer having a thickness capable of crimping the upper material (10) and the midsole material (5) by melting, and is made of ethylene. A waterproof, low-melting-point thermoplastic resin that is composed of vinyl acetate, polyurethane, polypropylene, etc., and is characterized by being capable of self-adhesion with a melting point of 70-120 ° C. that does not damage the upper material (10) during thermocompression bonding. is there.

The waterproof low-melting point thermoplastic resin layer (4) is an organic thermoplastic polymer having flexibility and rigidity that does not impair the texture of the midsole (5).

As shown in FIG. 2, the upper material (10) and the midsole material (5) are suspended by suspending the upper material (10) on the lower surface of the midsole material (5) and then melting the waterproof low-melting point thermoplastic resin. ) Are self-adhered and penetrated into the upper material (10) and the midsole material (5) by melting of the resin, and bonded and provided with a waterproof function.

In this way, the upper material (10) obtained by laminating the waterproof moisture permeable film (2) and the lining material (3) on the back surface of the outer material (1) is bonded to the waterproof low-melting-point thermoplastic resin. It is possible to provide a waterproof shoe having a waterproof function in which the layer (4) is hung on the mid-sole material (5) laminated on the whole surface with a certain thickness and melts the waterproof low-melting point thermoplastic resin layer (4). .

Furthermore, in order to provide a more robust waterproof function, a waterproof low-melting point thermoplastic resin sheet (6) is used as a gasket sheet, and the entire surface is further covered so as to further cover the entire periphery of the molten suspended edge (51). It is possible to provide waterproof shoes that are bonded and melt-molded to be waterproof.

The midsole material (5) laminated with the waterproof low melting point thermoplastic resin layer (4) is bonded to the shoe sole material when the hanging edge (51) of the upper material (10) is thermocompression bonded. It is necessary to have a thickness with uniform flatness suitable for the above.
Even when the waterproof low-melting point thermoplastic resin layer (4) is formed on the entire surface, or when the waterproof low-melting point thermoplastic resin layer (4) is formed with a constant width around the periphery, it is possible to provide uniform flatness. Taken.

With such a configuration, the waterproof shoe and the manufacturing method thereof are formed by previously forming a waterproof low-melting point thermoplastic resin layer on the back surface of the midsole, and the upper material is suspended and thermally welded. It is possible to provide a waterproof shoe with a high waterproof function that is simple to manufacture and does not leak water.
It is a manufacturing method that can be applied to general shoes such as rain shoes, casual shoes, and business shoes, and can also be used for waterproof shoes for business use.

BRIEF DESCRIPTION OF THE DRAWINGS In the waterproof shoes which concern on this invention, and its manufacturing method, the Example of the manufacturing method of waterproof shoes is shown, Comprising: Explanatory drawing which shows the suspending joining process of a shell material and a midsole material. The process explanatory drawing which shows the same Example and shows the state which melt | dissolved after the upper material was suspended in the waterproof low-melting-point thermoplastic resin layer of a midsole. In the same example, the upper material is hung on the waterproof low-melting-point thermoplastic resin layer of the midsole and melted, and further, a waterproof low-melting-point thermoplastic resin sheet is attached and melted. Process explanatory drawing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Front cover material 2 Waterproofing moisture-permeable film layer 3 Lining material 10 Back material 4 Waterproof low melting point thermoplastic resin layer 5 Middle bottom material 6 Waterproof low melting point thermoplastic resin sheet

Claims (4)

A waterproof / breathable film layer (2) is laminated on the back surface of the upper shell (1) on the back surface of the upper shell (1) on the inner bottom material (5) having a waterproof low-melting point thermoplastic resin layer (4) laminated on the back surface. 3) The upper shell material (10) piled up was suspended in the waterproof low-melting point thermoplastic resin layer (4), and the waterproofing function was provided by self-adhesion by melting the suspended edge (51). Waterproof shoes characterized by that. In the manufacture of waterproof shoes, a waterproof low-melting point thermoplastic resin layer (4) is laminated on the entire surface of the insole material (5) with a certain thickness, and a waterproof moisture-permeable film layer ( The upper material (10) in which 2) is laminated and the lining material (3) is stacked is suspended and joined to the midsole material (5), and the suspended edge (51) is connected to the waterproof low-melting-point thermoplastic resin layer. (4) A method for producing a waterproof shoe, wherein the adhesive is self-adhering by melting. The suspended edge (51) obtained by melting and adhering the waterproof low-melting point thermoplastic resin layer (4) is further covered with the waterproof low-melting point thermoplastic resin sheet (6) so as to be self-adhered. The waterproof shoe according to claim 1, wherein The waterproof low-melting-point thermoplastic resin layer (4) laminated on the midsole (5) is made of natural leather, artificial leather or woven outer cover material (1), waterproof / breathable film layer (2), lining material. A flexible and rigid organic thermoplastic polymer with a thickness that can be pressure-bonded by melting the upper material (10) comprising (3), and is composed of ethylene vinyl acetate, polyurethane or polypropylene. The waterproof shoe according to claim 1, wherein self-adhesion is possible with a melting point of 70 to 120 ° C that does not damage the upper material (10) during thermocompression bonding.

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