阅读说明：本技术 一种聚合物一体成型鞋大底及其制备方法 (Polymer integrally-formed shoe outsole and preparation method thereof ) 是由 冯建龙 田心花 于 2019-11-11 设计创作，主要内容包括：本发明涉及鞋底技术领域,具体涉及一种聚合物一体成型鞋大底及其制备方法,所述鞋大底包括与地面接触的鞋套以及与鞋套一体成型的鞋中底,所述鞋套为TPU材料,所述鞋中底由PU发泡材料和TPU爆米花材料两种材料组成,或者由PU发泡材料和弹力胶材料两种材料组成,将鞋中底的两种材料混合后灌注到鞋套内,一体成型制成鞋大底。本发明的一体成型鞋大底具有轻量、回弹性好、耐磨止滑的特性,穿着舒适性好,且采用多种材料一体成型,性能优异,成本低。(The invention relates to the technical field of soles, in particular to a polymer integrally formed shoe outsole and a preparation method thereof. The integrally formed outsole has the characteristics of light weight, good rebound resilience, wear resistance and slip resistance, is comfortable to wear, is integrally formed by adopting various materials, and is excellent in performance and low in cost.)

1. A polymer integrally formed outsole, the outsole comprising a cover for contacting the ground and a midsole integrally formed with the cover, the polymer integrally formed outsole characterized by: the shoe cover is the TPU material, the shoe insole comprises two kinds of materials of PU foaming material and TPU popcorn material, perhaps comprises two kinds of materials of PU foaming material and stretch glue material, pours into the shoe cover after mixing two kinds of materials in the shoe insole, and integrated into one piece makes the big end of shoes.

2. A polymer integrally formed shoe outsole as claimed in claim 1, whereinIn the following steps: the density of the TPU material is 1.17-1.23g/cm³The Shore hardness is 76-82A.

3. A polymer integrally formed outsole as claimed in claim 1, wherein: the density of the PU foaming material is 0.27-0.33g/cm³And the rebound resilience is 45-55%.

4. A polymer integrally formed outsole as claimed in claim 1, wherein: the density of the elastic glue material is 0.43-0.49g/cm³And the rebound resilience is 50-60%.

5. A polymer integrally formed outsole as claimed in claim 1, wherein: the density of the TPU popcorn material is 0.12-0.18g/cm³And the rebound resilience is 55-65%.

6. A polymer integrally formed outsole as claimed in claim 1, wherein: the weight ratio of the PU foaming material to the TPU popcorn material or the elastic glue material is 55-65: 35-45.

7. A method of manufacturing a polymer integrally formed shoe outsole as claimed in any one of claims 1 to 6, wherein: the method comprises the following steps:

(1) firstly, adding 0.5-1.5 thousandth of catalyst into a PU foaming material, uniformly stirring, adding into a PU machine material cylinder, pouring a TPU popcorn material or an elastic adhesive material into a particle cylinder, and adding water into a water cylinder;

(2) and then adjusting the proportion of a machine, wherein the weight ratio of water to the PU foaming material is 1: 800-1200, wherein the weight ratio of the PU foaming material to the TPU popcorn material or the stretch glue material is 55-65: 35-45;

(3) after the proportion is adjusted, the mixed PU foaming material and the TPU popcorn material or the elastic glue material can be injected into the shoe cover in the mould, and the shoe outsole is prepared after the material injection is finished and the foaming and the forming are carried out.

8. The method of claim 7, wherein the step of forming the polymer integrally comprises: in the step (1), the temperature of the raw materials is 35-45 ℃, and the pressure in the material cylinder is 0.8-1.2kgf/cm²。

9. The method of claim 7, wherein the step of forming the polymer integrally comprises: in the step (3), the temperature of the die is 55-65 ℃.

10. The method of claim 7, wherein the step of forming the polymer integrally comprises: in the step (3), the forming temperature is 75-85 ℃, and the forming time is 6-10 min.

Technical Field

The invention relates to the technical field of soles, in particular to a polymer integrally-formed outsole and a preparation method thereof.

Background

As a fourth generation sole material after rubber, PVC and SBS, TPU (thermoplastic polyurethane elastomer) has better elasticity, wear resistance, tear resistance and bending property, and is one of the preferred sole materials for various special shoes with extremely high requirements, such as football shoes, ice skates, climbing shoes and the like.

The process adopted by the existing TPU applied to shoe material production is a TPU foaming process, namely a TPU foaming process, which is like popcorn, the TPU is made into granules, and the granules can be made into old corn granules. Then thrown into a machine similar to a popcorn machine, then after high temperature and pressure the corn is changed into popcorn, after which about 2000 grains of popcorn are processed into the desired sole shape using a steam molding process, during which the outermost layer of the foamed grains slightly melts and adheres to a stable shape, while the internal pore structure is not affected. After the sole is pressed, the sole can be compressed to half size, so that the vibration force born by the sole is greatly reduced, and after the compression force disappears, the sole can be quickly restored to the original shape.

The common sole comprises an outsole and a PU (polyurethane) foaming sole positioned above the outsole, the outsole comprises a shoe cover contacted with the ground and a shoe insole integrally formed with the shoe cover, the sole part of the existing integrally formed sole can only be used as a heel, the material is single, and the overall performance is poor.

Disclosure of Invention

In order to overcome the defects and shortcomings in the prior art, the invention aims to provide the polymer integrally-formed outsole which has the characteristics of light weight, good rebound resilience, wear resistance and skid resistance, is comfortable to wear, is integrally formed by adopting multiple materials, and has excellent performance and low cost.

The invention aims to provide a preparation method of a polymer integrally-formed shoe outsole, which has the advantages of simple steps, convenient operation and control, stable quality, high production efficiency and low production cost and can be used for large-scale industrial production.

The purpose of the invention is realized by the following technical scheme: the utility model provides a polymer integrated into one piece big end of shoes, the big end of shoes includes the shoe cover with ground contact and with shoe cover integrated into one piece's shoe insole, the shoe cover is the TPU material, the shoe insole comprises two kinds of materials of PU expanded material and TPU popcorn material, perhaps comprises two kinds of materials of PU expanded material and stretch glue material, pours into the shoe cover after mixing two kinds of materials in the shoe insole, and integrated into one piece makes the big end of shoes.

Preferably, the TPU material has a density of from 1.17 to 1.23g/cm³The Shore hardness is 76-82A. The invention adopts the TPU material to form the shoe cover by strictly controlling the density and the Shore hardness of the TPU material, has the advantages of transparency, good wear resistance and slip resistance,can be directly contacted with the ground without additionally processing the sole; in addition, due to the high permeability of the TPU material, the shoe cover can have a colorful effect by adding pigments, and can be carved, printed and the like on the surface in a variety of fashions. More preferably, the TPU material has a density of 1.2g/cm³Shore hardness is 78A.

Preferably, the density of the PU foaming material is 0.27-0.33g/cm³And the rebound resilience is 45-55%. The shoe outsole manufactured by strictly controlling the density and the rebound rate of the PU foaming material has light weight, good elasticity and comfortable wearing. More preferably, the density of the PU foaming material is 0.30g/cm³The rebound resilience is 50%.

Preferably, the density of the elastic rubber material is 0.43-0.49g/cm³And the rebound resilience is 50-60%. The sole made by the invention has good elasticity, comfortable wearing, transparency and beautiful appearance by strictly controlling the density and the rebound rate of the elastic rubber (jelly glue) material. More preferably, the density of the stretch rubber material is 0.46g/cm³The rebound resilience was 55%.

Preferably, the density of the TPU popcorn material is 0.12 to 0.18g/cm³And the rebound resilience is 55-65%. The TPU popcorn material can be poured into the shoe cover together with the PU foaming material and then foamed and molded, or can be foamed before being poured together with the PU foaming material; the TPU popcorn material is granulated and can be dyed after being foamed, so that the TPU popcorn material can be dyed into single color or colorful color, and the TPU popcorn material produced by the BASF company is purchased at present. According to the invention, the density and the rebound resilience of the TPU popcorn material are strictly controlled, so that the prepared shoe outsole has the advantages of light specific gravity, good elasticity and attractive appearance. More preferably, the TPU popcorn material has a density of 0.15g/cm³The rebound resilience was 60%.

Preferably, the weight ratio of the PU foaming material to the TPU popcorn material or the stretch rubber material is 55-65: 35-45. According to the invention, by strictly controlling the weight ratio of the PU foaming material to the TPU popcorn material or the elastic glue material, the prepared outsole has the characteristics of light weight, good rebound resilience, wear resistance and slip resistance, and is comfortable to wear. More preferably, the weight ratio of the PU foaming material to the TPU popcorn material or the stretch rubber material is 60: 40.

A preparation method of a polymer integrally formed outsole comprises the following steps:

(1) firstly, adding 0.5-1.5 thousandth of catalyst into a PU foaming material, uniformly stirring, adding into a PU machine material cylinder, pouring a TPU popcorn material or an elastic adhesive material into a particle cylinder, and adding water into a water cylinder;

(2) and then adjusting the proportion of a machine, wherein the weight ratio of water to the PU foaming material is 1: 800-1200, wherein the weight ratio of the PU foaming material to the TPU popcorn material or the stretch glue material is 55-65: 35-45;

(3) after the proportion is adjusted, the mixed PU foaming material and the TPU popcorn material or the elastic glue material can be injected into the shoe cover in the mould, and the shoe outsole is prepared after the material injection is finished and the foaming and the forming are carried out.

And (4) spraying a release agent in the mould after taking out the product in the mould so as to produce again.

In the step (1), the temperature of the raw materials is 35-45 ℃, and the pressure in the material cylinder is 0.8-1.2kgf/cm 2.

In the step (3), the temperature of the die is 55-65 ℃.

In the step (3), the forming temperature is 75-85 ℃, and the forming time is 6-10 min.

According to the invention, by controlling the process parameters of the raw material temperature, the pressure in the material cylinder, the temperature of the mold, the molding temperature, the molding time and the like of the mixed PU foaming material, the integrally molded outsole prepared has the characteristics of light weight, good rebound resilience, wear resistance and slip resistance, and is comfortable to wear.

The invention has the beneficial effects that: the integrally formed shoe outsole of the invention has the following advantages:

1. the integrally formed outsole has the characteristics of light weight, good rebound resilience, wear resistance and slip resistance, and is comfortable to wear.

2. The TPU popcorn material can be dyed in advance to be made into colorful soles, and is attractive and fashionable.

3. The traditional air cushion shoes are hard and have poor use comfort, and once the traditional air cushion shoes are punctured, the whole sole is scrapped, but even if the integrally formed outsole of the invention is punctured, the rebound resilience is not influenced at all.

4. The TPU material can be made into the whole finished sole by injection molding, the outsole integrates the advantages of 3 materials, the performance is excellent, and the production cost can be reduced by 15-20% compared with the existing integrally molded sole.

Detailed Description

The present invention will be further described with reference to the following examples for facilitating understanding of those skilled in the art, and the description of the embodiments is not intended to limit the present invention.