JPH02161903A - Counter material - Google Patents

Abstract

PURPOSE:To improve the shape holding ability of a heel part and to prevent the coming off of a foot from the heel part by laminating a base material layer, which is to be arranged at the outer surface side of a counter and composed of a thermoplastic resin having a comparatively low thermal shrinkage percentage, and a surface layer, which is to be arranged at the inner surface side of the counter and composed of a thermoplastic resin having a comparatively high thermal shrinkage percentage. CONSTITUTION:A counter material A is composed by laminating at least a base material layer 11, which is to be arranged at the outer surface side of a counter 10 and composed of the thermoplastic resin having the comparatively low thermal shrinkage percentage, and a surface layer 12, which is to be arranged at the inner surface side of this counter and composed of the thermoplastic resin having the comparatively high thermal shrinkage percentage. For the material of the base material layer 11, an ethylene and vinyl acetate copolymer sheet is used. For the material of the surface layer 12, a polystyrene stretch film is used. The area thermal shrinkage percentage of the base material layer 11 is ordinarily 0.01-5% and preferably 0.1-3%, and the area thermal shrinkage percentage of the surface layer 12 is ordinarily approximately 5-70% and preferably 10-40%. The base material layer 11 and the surface layer 12 are stuck, for example, with a hot melt adhesive and laminated.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is attached to the heel of a shoe to improve the shape retention of the heel in order to prevent the foot from slipping out of the heel of the shoe. Regarding the counter material that is used as the counter material.

[Conventional technology]

Conventionally, in order to prevent the foot from slipping out of the heel of the shoe, counters that are attached to the heel of the shoe to improve the shape retention of the heel have been made using, for example, a single layer of leather board or thermoplastic resin. Some use counter material.

These counter materials based on leather boards, thermoplastic resins, etc. are used as counters by heating and pressurizing a flat plate to give it a shape, or by heating and pressurizing it during the shoe manufacturing process. The built-in counters are used by shaping them into the desired counter shape.

[Issue 8 to be solved by the invention] By the way, as mentioned above, conventional counter materials use, for example, a single layer of leather board or thermoplastic resin as a base material, so it is difficult to solve problems by heating and pressurizing a flat plate. Regardless of whether the counter is made by applying a customization or by using the heating and pressurizing process during the shoe manufacturing process, the shape retention will deteriorate if used for a long period of time. The deformation of the shoe was significant, making it difficult to maintain its initial shape, and therefore, the foot was likely to slip out of the heel of the shoe.

The present invention was made against the background of such conventional technology, and can improve the shape retention of the heel part during long-term use of shoes, thereby improving the shape retention of the heel part of the shoe during long-term use. The purpose is to provide a counter material that can prevent slippage.

[Means to solve the problem]

The present invention is arranged at least on the outer side of the counter,
A base material layer made of a thermoplastic resin with a relatively low heat shrinkage rate and a surface layer made of a thermoplastic resin with a relatively high heat shrinkage rate disposed on the inner surface of the counter are laminated. The purpose is to provide counter materials that can

Hereinafter, the present invention will be explained with reference to the drawings.

As shown in FIGS. 1 to 3, the counter material A of the present invention has a base material layer 1 disposed at least on the outer surface side of the counter 10 and made of a thermoplastic resin with a relatively low thermal shrinkage rate.
1 and a surface layer 12 made of a thermoplastic resin having a relatively high heat shrinkage rate and disposed on the inner surface side of the counter.

As the material for this base layer 11, an ethylene-vinyl acetate copolymer sheet is used, but there are also other materials that have a relatively low heat shrinkage rate, such as thermoplastic synthetic rubber (styrene-butadiene rubber, etc.), ionomer ( Sheets made of polyurethane, polyvinyl chloride, polystyrene, polypropylene, polyethylene, polyamide (nylon 6, nylon 6.6, etc.), polyester (polyethylene terephthalate, etc.) Alternatively, fabrics such as nonwoven fabrics, woven fabrics, and knitted fabrics made of these materials can also be used.

In addition, as the material for the surface layer I2, a stretched film made of polystyrene is used, but there are also other stretched films that have a relatively high heat shrinkage rate, such as polyethylene, polyvinylidene chloride, polypropylene, polyethylene, and polyvinyl chloride. A film or a stretched unheated fabric made of these materials can also be used.

- The area heat shrinkage rate of the base material layer 11 is usually 0.01 to 5.
%, preferably 0.1 to 3%, and the areal heat shrinkage rate of the surface layer 12 is usually about 5 to 70%, preferably 10 to 3%.
It is 40%.

Therefore, this surface layer 12 is usually 0% lower than the base material layer 11.
It is designed to have a high areal heat shrinkage rate of about 70%, preferably about 10 to 40%.

Note that the areal heat shrinkage rate is a value measured at the softening temperature of the thermoplastic resin.

Further, the total thickness of the base layer 11 and the surface layer 12 is 0, 5
~5. 0 city, preferably 1.0 to 3. It is about 0 torso.

These base layer 11 and surface layer 12 are bonded and laminated using, for example, a hot melt adhesive, but they may also be laminated using a solvent glue such as a chlorobrene solvent glue, a polyurethane solvent glue, or the like.

In addition, in the figure, the code 20 is the shoe cover, the code 3° is the sole,
Reference numeral 40 is the last part of the main body.

This counter material A is manufactured by punching a sheet-shaped counter material A in advance into a substantially semicircular shape as shown in FIG. 2 using a punching die (not shown), and then injection molding the counter 10 manufactured in this way. If the counter 10 is to be used in short shoes, for example, as shown in FIG. 4, the counter 10 is first sewn onto the jacket 20, and then the counter 10 is sewn onto the jacket 20, as shown in FIG. The counter 10 is suspended in the main body last 40 which has a built-in heater to heat the counter 10 to the final shaping temperature and pressurized to final shape the counter 10, and simultaneously with or after the final shaping. Then, the main body last 40 is fitted into a side mold and a bottom mold (not shown), and a shoe sole 3 shown in FIG.
By performing general injection molding to mold 0, the 6th
The short shoes shown in FIG. 7 and FIG. 7 are manufactured.

Note that the forming temperature of this counter 10 is usually 6
0 to 200°C, heating time is 1 to 240 seconds,
Preferably, the heating temperature is 50 to 180°C and the heating time is 5 to 180 seconds.

Note that the forming temperature and heating time of the counter 10 are the same in the case of boots obtained by the slush molding method.

In this way, the counter material A of the present invention has the base material layer 11 made of a thermoplastic resin with a relatively low heat shrinkage rate shown in FIGS. 1 to 3 disposed on the outer surface side of the counter 10, Since the counter 10 is formed by disposing the surface layer 12 made of a thermoplastic resin with a high shrinkage rate on the inner surface of the counter 10, the counter 10 is always fixed in a curved state toward the inner surface due to the material structure. It is possible to improve the shape retention of the heel during long-term use of shoes (not shown),
This also prevents the foot from slipping out of the heel of the shoe during long-term use.

Although the counter material of the present invention has been described above, the counter material of the present invention is not limited to the above (and even if there is a design change without changing the gist, it is included in the present invention.

For example, the counter material of the present invention is used for short shoes, and when the sole of the shoe is manually attached to the bottom of the main body last from which the shoe cover having the counter material of the present invention is suspended in the heel part. , where the counter material is shaped by heating and pressurizing the main body last, which is also used for short shoes, and the counter material is formed by heating and pressurizing the main body last at a predetermined time in the injection molding process. In addition to counters for men's boots manufactured by the slash molding method, it is also applied to counters for women's and children's boots manufactured by the slash molding method.

In the case of short shoes, etc., a material equivalent to the lining cloth is pasted on the inner surface of the counter material of the present invention, and then this counter material is sewn to the shoe cover, and then this shoe cover is attached to the last of the main body. When manufacturing shoes, this counter material can be shaped into a counter by heating and pressurizing the last of the main body.

Furthermore, the counter material is not limited to one consisting of two layers, a base material layer and a surface layer, but may be made of three or more layers as long as it has at least these base material layers and a surface layer. do not have.

[Effect]

The counter material of the present invention first includes a base layer made of a thermoplastic resin having a relatively low heat shrinkage rate and arranged on at least the outer surface side of the counter, and a base material layer having a relatively low heat shrinkage rate arranged on the inner surface side of the counter. A counter material is formed by laminating a surface layer made of a high thermoplastic resin, and then this counter material is heated and shaped into a desired counter shape to provide a counter.

The counter thus formed is used by being attached to the heel of the shoe by a predetermined means.

The counter material of the present invention has a base material layer made of a thermoplastic resin with a relatively low heat shrinkage rate disposed on the outer surface side of the counter, and a surface layer made of a thermoplastic resin with a relatively high heat shrinkage rate. Since the counter is placed on the outer side of the counter to form the counter, the material structure means that the counter is always fixed in a curved state towards the inner side, thus improving the shape retention of the heel area during long-term use of the shoe. This also prevents the foot from slipping out of the heel of the shoe during long-term use.

〔Example〕

EXAMPLES Hereinafter, the present invention will be explained in more detail with reference to Examples.

Example 1 From the slush molding method as shown in FIG. 9 using the counter material A shown in FIGS. 1 to 3 and the insole 50 in which the counter 10 shown in FIG. 8 is erected at the heel part. manufactured boots.

In addition, an ethylene-vinyl acetate copolymer sheet with a thickness of 1.3 mm was used as the material for the base layer 11, and a polystyrene stretched film with a thickness of 0.2 mm was used as the material for the surface layer 12.
A sheet laminated with chloroprene solvent glue was used as the counter material A, and the area heat shrinkage rate of the base layer 11 was 0.30%, and the area heat shrinkage rate of the surface layer 12 was 40%.
Met.

First, as shown in FIG.
It was stapled to the top and erected.

After that, the lining cloth 70 is hung on the main body last 1-60 shown in FIG. The inner sole 50 with a counter lO on which a melt adhesive is applied on the front and back surfaces is attached, and then this lining fabric 70 and the inner sole 20 are attached to the main body last 60,
A skin S manufactured by the slush molding method described later was fitted. At this time, set the last 60 of the main body to 15
By heating to 0°C and processing after heating for 10 seconds,
The counter 10 was formed into a desired shape.

In this embodiment, the counter 10 is formed in the molding process, but it is also possible to use a counter 10 which is formed in advance in a separate process. It is also possible to use a counter in which the peripheral part of the upper end of the counter 10 is shaved so that it fits better on the feet.

Here, to explain the method of manufacturing the skin S using the slush molding method, first, a boot (not shown) is actually made, and then a metal layer is formed on the surface of the boot (not shown) by electroforming or metal vapor deposition. The metal layer is peeled off from the boot to provide a hollow mold, also not shown.

Next, a molding material (not shown) for the soles and shoe covers, such as plastisol of vinyl chloride resin paste, is injected into this hollow mold (not shown), and then heated from the outside in an oven to bring the inner surface of the mold into contact. After the sol is gelatinized from the part and grown to a predetermined thickness, the ungelled sol inside is discharged, and the remaining gelled layer is heated and cooled to integrate the sole and the shoe cover as shown in Figure 9. A boot-shaped skin S as shown is molded. Note that, for example, if the sole of the shoe has a thick heel, a molding material such as vinyl chloride resin may be additionally injected into that portion later.

Example 2 A sheet in which a polyvinyl chloride sheet with a thickness of 1.0 mm as the material for the base layer 11 and a polyvinyl chloride stretched film with a thickness of 0.15 mm as the surface layer 12 are laminated with polyurethane solvent glue. was used as counter material A.

The area heat shrinkage rate of the base material layer 11 was 1.50%, and the area heat shrinkage rate of the surface layer 12 was 35%.

Using this counter material A, men's boots were manufactured in the same manner as in Example 1, and boots having a counter 10 formed into a desired shape were manufactured.

(Effects of the Invention) Since the present invention is as described above, it is possible to improve the shape retention of the heel part during long-term use of the shoe, thereby preventing the foot from slipping out of the heel part of the shoe during long-term use. The effect is that it can be prevented.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a counter made of a counter material according to an embodiment of the present invention, Fig. 2 is a plan view of the counter material according to an embodiment of the present invention, and Fig. 3 is a perspective view of a counter material according to an embodiment of the present invention. FIG. 4 is a perspective view of a cover to which a counter made of counter material is sewn in accordance with an embodiment of the present invention, and FIG. 5 is a main body of the cover to which the counter of FIG. FIG. 6 is a perspective view of a shoe that employs a counter made of counter material according to an embodiment of the present invention; FIG. 7 is a sectional view taken along the line ■-■ of FIG. 6;
FIG. 8 is a perspective view of an insole with a counter made of a counter material according to an embodiment of the present invention, and FIG. 9 shows a manufacturing process of a boot employing the insole with a counter of FIG. FIG. A; Counter material 1O; Counter 11; Base material layer 12; Surface layer Patent applicant: Achilles Co., Ltd. Attorney, Barco Co., Ltd. Patent attorney Self-defense: Shigetaka Figure 1 Figure Figure I Figure ? Gukeshi ^ Figure Figure

Claims (1)

[Claims] (1) A base material layer disposed at least on the outer surface side of the counter and made of a thermoplastic resin with a relatively low heat shrinkage rate;
This counter material is characterized by laminating a surface layer made of a thermoplastic resin with a relatively high heat shrinkage rate and placed on the inner surface of the counter.