JPH0910011A - Vamp of shoe - Google Patents

Abstract

PURPOSE: To make a step at a box toe smaller to prevent it from coming into contact with the foot, and to enhance the shape retainability of a vamp by thermally fusing together the low-melting-point thermoplastic films which are bonded to the back of the instep part of the vamp and to the box toe. CONSTITUTION: An ethylene-vinyl-acetate copolymer(EVA) sheet 2 is bonded to urethane synthetic leather 9, and a low-melting-point thermoplastic film 3 is bonded thereto for the preparation of a layered sheet. The layered sheet is cut by a vamp-cutting blade into a vamp 4 that is cut into a vamp shape. Separately from the sheet, a high-melting-point thermoplastic film 6 and a low-melting-point thermoplastic film 3 are bonded to a cotton fabric or nonwoven fabric 5 as first and second layers, respectively, to prepare a layered sheet, which is then cut by a box-toe-shaped blade into a box toe 7. The instep part of the vamp 4 cut is pressed against the box toe 7 using a press. The retainability of the toe shape is enhanced by the combined effect of the vamp and a box-toe resin layer. Also, curling of the end that may be caused if it is made too thin does not occur, and the end does not come into contact with the foot. The low-melting-point plastic films of the vamp and the box toe are fused together to eliminate a step.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an instep having a low melting point thermoplastic film adhered to the back surface, and a low melting point thermoplastic film or a high melting point thermoplastic film as an adhesive layer applied to a cotton cloth or a non-woven fabric. The present invention relates to a shoe instep using a core.

[0002]

2. Description of the Related Art Conventionally, for insteps such as casual shoes or jogging shoes, a polyurethane home or the like is attached between the front cloth and the back cloth to form a bulge on the whole, or the inner surface of the toe which is easily torn. Is an instep cover laminated with a reinforcing cloth. Such a reinforcing cloth is heat-pressurized and laminated through a high melting point thermoplastic resin sheet at a temperature at which the resin sheet is incompletely melted. At this time, the high melting point thermoplastic resin sheet does not completely penetrate into the backing cloth because it is in an incompletely melted state, so that the polyurethane home is released from the pressurized state and at the same time expands to a thickness close to the initial thickness. Had been restored.

For this reason, when the insole is sewn on the bottom of the instep and is hung at the last in order to mold shoes,
Due to the polyurethane home expanded and restored to a thick state, streak wrinkles due to the folds of the instep are formed on the inner and outer surfaces of the toe with a large curvature, which damages the appearance of the manufactured shoes and There was a risk that wrinkles would come into contact with them and make them uncomfortable to wear.

Women's pumps and men's leather shoes are
Generally, a hard toecap (10) is used to prevent deformation. Particularly in recent years, shoes using urethane synthetic leather or cotton cloth like pumps and leather shoes have been increasing in number with the casualization. When a hard toecap (10) is used on the back of soft synthetic leather (nubuck tone, etc), streaky steps are formed on the surface of the instep, which not only deteriorates the feel and feel of the surface but also streaks. Dust and mud adhere to the area of and the dirt is hard to remove.

On the other hand, when a soft toecap is used, the roundness of the toe and the shape retention of the rounded shape are not good. Therefore, we use a toecap with 2 or 3 sheets attached for the purpose of hardening it.
The thickness is thicker and more streaky steps are created. In order to solve this, a method is used in which the toe to be overlapped is reduced to a similar shape and overlapped.

[0006]

When using the hard toecap (10) described in the prior art, that is, the hard toecap (10) having a thickness of 0.6 MM or more, a step is formed. Therefore, the step is eliminated by making a plow on the cloth side around the toecap and providing an inclination around the cloth side. However, it is difficult to uniformly plow the width and thickness of the plowed portion, and variations often occur. If the spade is thin, the tip of the spade curls (see Fig. 2) and may cause a foot hit. Further, when the toecap is adhered to the instep, pressure is unlikely to be applied, and the plow part peels off and rises during wearing, which also causes a foot hit.

In addition, since the plowed part has no cloth and only the resin layer, the plow part sticks to the heating plate of the toecap crimping machine, which causes curling and is a major cause of peeling during wearing. This makes the crimping work process difficult (a factor that occurs because the cloth side of the toecap is overplowed). On the other hand, if the hard toecap (10) side is overplowed too much, it will not stick to the heating plate of the toecap crimping machine, but the adhesion to the synthetic leather will be poor (see Fig. 3) (for synthetic leather (Because there is a gap in the spade part and the thickness becomes thin during crimping).

[0008] Next, the method of hardening by using several soft toecaps is a better method for eliminating the step because the toecaps to be superposed are made smaller in a similar shape and superposed, but the step of laminating and adhering Has the drawback of increasing. There is also a method of sticking several sheets at the same time. In this method, heat is transferred only to the uppermost toecap and the adhesion is good, but the heat transfer is poor and the adhesive strength is weaker toward the bottom. Furthermore, when several sheets are piled up, the cotton cloth contained between the resins does not stretch even by the heat when the shape of the toe is retained, because it is not thermoplastic. Therefore, the shape retention is inhibited.

[0009]

Means for Solving the Problems A soft synthetic leather is used as an instep, and a low melting point thermoplastic film is thinly attached to the back surface of the instep of the instep, and a high melting point thermoplastic film having a high hardness is applied to a cotton cloth. Alternatively, a shoe instep is provided in which a thick core is attached to a non-woven fabric, a toecap on which a low-hardness thermoplastic film having a low hardness is thinly attached is laminated, and further an instep is laminated.

[0010]

[Function] On the back side of the instep of the instep using soft synthetic leather,
By sticking a low-melting point thermoplastic film, by laminating a toecap made by sticking a high-melting point thermoplastic film / low-melting point thermoplastic film to a cotton cloth or a non-woven fabric, even if sticking the toecap without sparing, The low melting point thermoplastic films of both the instep and the toe core are fused by heat, so that no step is formed on the surface of the instep and no linear wrinkles are generated.

[0011]

An embodiment of the present invention will be described. First, a nubuck-like urethane synthetic leather (9) 1.3MM thick cloth is coated with an ethylene / vinyl acetate copolymer (EVA), and a T-die is used to form an EVA sheet (2) having a thickness of 0.05 to 0.2MM. Low melting point thermoplastic film attached (3)
Prepare the adhered layered material sheet. An instep cover (4) obtained by cutting the layered material sheet into an instep shape by a cutting blade type for instep cover.
Is molded. Separately, a high-melting point thermoplastic film (6) is used as a first layer and a low-melting point thermoplastic film (3) is used as a second layer to prepare a layered material sheet adhered to a cotton cloth or a non-woven fabric (5) to prepare a toecap shape. The tip core (7) is formed by cutting with a blade mold.

The instep and toecap (6) of the cut instep cover (4) are pressure-bonded (160 ° C. × 5 sec × 4.0 Kg / cm ² ) by a press machine having a surface of a heating plate subjected to fluorine processing.
I do. In addition, each part is formed, and each part is sewn to form the instep (1) of the shoe. Naturally, not only the instep (1) of the shoe but also the bottom portion is formed in a separate process.

The molded shoe instep (1) is attached to the last, and the shoe is suspended by a toaster of a suspender, and then heat set at 80 ° C. for 30 minutes. Further, after the bottom is adhered, the temperature of the last heat setting is cooled to remove the mold. The laminated layer of the instep cover, the toecap, and the instep back of the present invention may be used in the heel portion by forming the toecap into a moon-shaped core.

[0014]

[Effect] A soft synthetic leather is used as the instep cover of the present invention, an EVA sheet and a low melting point thermoplastic film are attached to the back side of the instep, and a cotton cloth or a non-woven fabric as a toecap has the same low resistance as the film attached to the instep. By using a toecap to which a thermoplastic resin having a melting point and a thermoplastic film having a high melting point are attached and laminating the instep back, the shape retention of the toe shape is improved by a synergistic effect with the toecap resin layer. Further, even if the circumference of the toe box is plowed, the width and thickness of the plowed portion are not varied, and even if there is a difference, a cushioning effect is provided. Moreover, curling of the tip portion does not occur due to the thin spade and the foot does not hit. Even if the spade is eliminated, the low melting point thermoplastic film of the instep and the toecap are fused together to eliminate the step.

The low-melting thermoplastic film of the instep and the low-melting thermoplastic film of the toe core are fused with each other, so that there is no step difference as in the prior art. Therefore, a streak-like step is not formed on the surface of the instep, and the feel and texture of the surface are not hindered. Also, dust and mud do not adhere to the streak-like portion.

[Brief description of the drawings]

FIG. 1 (a) is a view before laminating an instep, a toecap, and an insole of an instep of the shoe of the present invention. (B) A diagram in which the instep, toecap, and instep of the instep of the shoe of the present invention are laminated.

FIG. 2 is a diagram in which the cloth side of the toecap is plowed and the plowed tip is curled.

FIG. 3 is a diagram in which the thermoplastic film side of the toecap is plowed and the plowed tip has poor adhesion.

[Explanation of symbols]

 1 Shoe instep 2 EVA sheet 3 Low melting point thermoplastic film 4 Instep 5 Cotton cloth or non-woven fabric 6 High melting point thermoplastic film 7 Toecap 8 Instep 9 Urethane synthetic leather 10 Hard toecap

Claims (1)

[Claims] 1. A flexible instep cover (4) having an EVA sheet (2) and a low melting point thermoplastic film (3) adhered to the back of the instep.
, A cotton cloth or non-woven fabric (5) is laminated with a toecap (7) having a high-melting point thermoplastic film (6) and a low-melting point thermoplastic film (3) as an adhesive layer in this order, and the instep (8) is further attached. Instep coat (1) characterized by being laminated.