METHOD FOR MANUFACTURING SHOE MATERIAL COMPRISING LEATHER AND CLOTH AND SHOE MATERIAL MADE THEREFROM

Abstract

The invention provides a method for manufacturing shoe material containing leather and cloth and a shoe material made therefrom. The method includes the steps of: a) material preparation; b) leather treatment; c) gluing; d) TPU (thermoplastic polyurethane) placement; and e) hot pressing. This saves time compared to the sewing process. The shoe material includes a cloth, a leather, a first hot-melt adhesive layer selectively provided on said leather or said cloth, and a TPU film having a second hot-melt adhesive layer covered on the leather and the cloth with the second hot-melt adhesive layer in contact with the leather and the cloth. In this way, the problem of excessive adhesive is avoided.

Claims

1. A method for manufacturing a shoe material comprising leather and cloth, comprising the steps of: a) material preparation: to prepare a cloth and a leather that has a front surface and a back surface; b) leather treatment: to perform a skiving treatment by skiving a part of said front surface of said leather to form a junction area; c) gluing: to set a first hot-melt adhesive layer on said back surface of said leather or said cloth; d) TPU (thermoplastic polyurethane) film placement: to prepare a TPU film having a second hot-melt adhesive layer and then to cover said TPU film on said junction area and said cloth so that said second hot-melt adhesive layer contacts said junction area and said cloth to form a shoe material; and e) hot pressing: to place said shoe material on a jig and to cover a pressure pad on said shoe material, and then to put said shoe material with said jig and said pressure pad in a hot press machine for hot pressing.

2. The method as claimed in claim 1, wherein in said skiving treatment of the step b) leather treatment, the thickness of said junction area of said leather is not less than 0.4 mm.

3. The method as claimed in claim 1, wherein said pressure pad is a silicone pressure pad.

4. The method as claimed in claim 1, further comprising a sub step, adding treatment agent, of adding a treatment agent to said back surface of said leather and said junction area after performing said skiving treatment in the step b) leather treatment.

5. The method as claimed in claim 1, further comprising a sub step, leather splitting, to thin the thickness of said back surface of said leather before performing said skiving treatment in the step b) leather treatment.

6. The method as claimed in claim 5, wherein said leather splitting allows the thickness of said leather to be not less than 0.8 mm.

7. The method as claimed in claim 3, wherein in the step e), the thickness of said silicone pressure pad is about 8 mm.

8. The method as claimed in claim 1, wherein in the step e), the hot-pressing conditions of the hot press machine are a pressing temperature of 150-170 degrees Celsius, a pressing pressure of 25-30 kg/cm2, and a pressing time of 30-50 seconds.

9. The method as claimed in claim 1, further comprising a step f) cold pressing: to put said shoe material into a cold press machine for pressing and setting after the step e) hot pressing.

10. The method as claimed in claim 9, wherein in the step f), the cold-pressing conditions of said cold press machine are a pressing pressure of 15-20 kg/cm2 and a pressing time of 15-30 seconds.

11. A shoe material comprising leather and cloth, comprising: a cloth; a leather; a first hot-melt adhesive layer selectively provided on said leather or said cloth and in contact with said leather and said cloth; and a TPU film having a second hot-melt adhesive layer, said TPU film being covered on said leather and said cloth, said second hot-melt adhesive layer contacting said leather and said cloth.

12. The shoe material comprising leather and cloth as claimed in claim 11, wherein said leather comprising a front surface; said front surface of said leather being partially skived to form a junction area; said TPU film is covered on said junction area and said cloth with said second hot-melt adhesive layer in contact with said junction area and said cloth.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG. 1 is a flow block diagram of a method for manufacturing a shoe material comprising leather and cloth in accordance with a first embodiment of the present invention.

[0015] FIG. 2 is a schematic sectional view of a shoe material comprising leather and cloth in accordance with a second embodiment of the present invention.

[0016] FIG. 3 is a schematic sectional view of a shoe material comprising leather and cloth in accordance with a third embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

[0017] Referring to FIG. 1 and FIG. 3, a method for manufacturing a shoe material comprising leather and cloth in accordance with a first embodiment of the present invention comprises the steps of a) material preparation, b) leather treatment, c) gluing, d) TPU (thermoplastic polyurethane) film placement, and e) hot pressing.

[0018] The step of a) material preparation is to prepare a cloth 11 and a leather 21.

[0019] The step of b) leather treatment is to perform a skiving treatment. The leather has a front surface 211 and a back surface 212. The skiving treatment is to skive a part of the front surface 211 of the leather 21 so as to form a junction area 213. The front surface 211 in this embodiment is the surface to which the leather 21 is to be bonded with other materials. And for this junction area 213, if natural leather is taken as an example, the epidermal layer of the leather 21 is skived to expose the part of the dermal layer. This is to remove the epidermal layer with high oil content, exposing the dermal layer with better joint ability than the epidermal layer, in order to enhance the strength of leather after bonding. It should be noted that in the skiving treatment of the leather treatment step, the thickness of the junction 213 of the leather 21 is not less than 0.4 mm, which is the condition of the leather thickness required for the consideration of the strength of the leather after bonding.

[0020] In addition, you can also choose to add a sub step, adding treatment agent, after the skiving treatment, which is to add a treatment agent to the leather 21. The treatment agent can be water-based or oil-based, considering the convenience of application, water-based is preferred.

[0021] In addition, it is better to choose to add a sub step, leather splitting, before performing the skiving treatment, which is to thin the back surface 212 of the leather 21. The leather splitting allows the thickness of the leather 21 to be not less than 0.8 mm, which is required for the subsequent processing processes.

[0022] The step of c) gluing is to set a first hot-melt adhesive layer 214 on the back surface 212 of the leather 21 or the cloth 11 for bonding the leather 21 and the cloth 11 together.

[0023] The step of d) TPU (thermoplastic polyurethane) film placement is to prepare a TPU film 31 having a second hot-melt adhesive layer 311, and then to cover the TPU film 31 on the junction area 213 and the cloth 11 so that the second hot-melt adhesive layer 311 contacts the junction area 213 and the cloth 11 to form a shoe material.

[0024] The step of e) hot pressing is to place the shoe material on a jig, and then to cover a pressure pad on the shoe material, and then to put the shoe material with the jig and the pressure pad in a hot press machine for hot pressing so as to complete the shoe material manufacturing process. It is worth mentioning that, in this embodiment, the pressure pad is a silicone pressure pad, and the thickness of the silicone pressure pad is about 8 mm. This is to ensure the effect of thermal compression. The hot-pressing conditions of the hot press machine are a pressing temperature of 150-170 degrees Celsius, a pressing pressure of 25-30 kg/cm2, and a pressing time of 30-50 seconds. These conditions ensure the thermal compression effect of the shoe material. This can save the production time of the shoe material compared to the sewing process.

[0025] In addition, in order to ensure the effect of hot pressing, a step f) cold pressing can be optionally included: the shoe material after the step e) hot pressing is put into a cold press machine for pressing and setting. In the step f) cold pressing, the cold-pressing conditions of said cold press machine are a pressing pressure of 15-20 kg/cm2 and a pressing time of 15-30 seconds.

[0026] Please refer to FIG. 2, a second embodiment of the present invention provides a shoe material, comprising: a cloth 11, a leather 21, a first hot-melt adhesive layer 214, and a TPU film 31.

[0027] The first hot-melt adhesive layer 214 is selectively set on the leather 21 or the cloth 11 and in contact with the leather 21 and the cloth 11.

[0028] The TPU film 31 has a second hot-melt adhesive layer 311. The TPU film 31 is covered on the leather 21 and the cloth 11 with the second hot-melt adhesive layer 311 in contact with the leather 21 and the cloth 11.

[0029] With this, the effect of using the first hot-melt adhesive layer 214 and the second hot-melt adhesive layer 311 as the bonding material can avoid the problem of excessive adhesive.

[0030] It is worth mentioning that, referring to FIG. 3, a third embodiment of the present invention provides a shoe material: the leather 21 has a front surface 211 and a back surface 212. The front surface 211 of the leather 21 is partially skived to form a junction area 213. The TPU film 31 is covered on the junction area 213 and the cloth 11. The second hot-melt adhesive layer 311 contacts the junction area 213 and the cloth 11. In this way, the structural strength of the shoe material can be enhanced.