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Foaming composite for shoes and preparation method of foaming composite

A foaming composition and technology for shoes, applied in the field of polymer materials, can solve the problems of easy deformation, low temperature toughness, and pressure resistance, etc., and achieve low compression set, tensile quality, and high resilience Effect

Active Publication Date: 2015-12-23
CHINA LEATHER & FOOTWEAR IND RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves the technical problems of the existing soles such as non-abrasion resistance, non-pressure resistance, poor low-temperature toughness, poor strength, easy deformation and low cost performance

Method used

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  • Foaming composite for shoes and preparation method of foaming composite
  • Foaming composite for shoes and preparation method of foaming composite
  • Foaming composite for shoes and preparation method of foaming composite

Examples

Experimental program
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Effect test

preparation example Construction

[0042] The present invention also provides a method for preparing the foaming composition for shoes of the present invention, which includes the step of mixing the components of the composition.

[0043] The preparation method of the foaming composition for shoes of the present invention specifically includes the following steps:

[0044] (1) Use a high-speed mixer to mix the base material evenly, melt and blend in an internal mixer at 130-160°C for 3-10 minutes; add activator, foaming agent, crosslinking aid and filler in sequence, banbury 3 -5min, finally add the crosslinking agent and mix for 2-3min before discharging;

[0045] (2) Press out the mixed raw materials, and then process and slice them into primary embryo raw materials with a predetermined volume;

[0046] (3) Put the raw material into the mold, and perform compression foaming under the temperature conditions of 5-20MPa and 165-185°C. After 5-15 minutes, the pressure is released to obtain the foam, and the finished prod...

Embodiment 1

[0051] The base material (80 parts of ethylene-octene block copolymer (OBCs), 10 parts of ethylene-octene random copolymer (POE), 10 parts of ethylene-vinyl acetate resin (EVA)) 100 parts are used in a high-speed mixer Mix well, melt and blend in an internal mixer at 130°C for 3 minutes; add 1.0 part of activator zinc stearate and 1.5 parts of zinc oxide, 3.5 parts of azodicarbonamide (AC) as foaming agent, and crosslinking aid Triallyl isocyanurate (TAIC) 0.6 parts and filler silica 25 parts, banbury for 5 minutes, and finally add crosslinking agent 1,4-bis-tert-butylperoxycumene (BIPB) 1.2 The parts are mixed for 2 minutes and then discharged; the mixed raw materials are pressed out, and then processed and sliced ​​into preliminary raw materials with a predetermined volume; the preliminary raw materials are placed in the mold, and under the conditions of 10MPa and 175℃, Perform molded foaming, release the pressure after 15 minutes to obtain a foam, and obtain the composition ...

Embodiment 2-4

[0053] The feed ratio of the raw materials of each component is shown in Table 1. Only the different ratios of the main materials are changed, and the rest are the same as in Example 1.

[0054] Table 1 Group distribution ratio of Examples 2-4

[0055]

[0056] Performance tests were performed on the compositions prepared in Examples 1-4, and the results are shown in Table 2:

[0057] Table 2

[0058]

[0059] It can be seen from Table 2 that when the content of activator, foaming agent, auxiliary crosslinking agent, filler and crosslinking agent is low and the content remains unchanged, with the different addition amounts of the three base materials, the foaming material Various properties have also changed accordingly. For example, as the content of ethylene-octene block copolymers (OBCs) increases, the density of the material decreases, the tensile strength, tear strength and hardness decrease, and the impact resilience rate is significant As the content of ethylene-vinyl acetate ...

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Abstract

The invention provides a foaming composite for shoes and a preparation method of the foaming composite. The foaming composite for shoes is prepared from base stock, foaming agents, cross-linking agents, assistant crosslinker, activating agents and fillers. The total mass of the base stock is 100%, and 2%-10% of the foaming agents, 0.8%-3% of the cross-linking agents, 0.1%-2% of the assistant crosslinker, 1%-5% of the activating agents and 5%-50% of the fillers. The base stock is prepared from, by mass, 40%-90% of ethylene-octylene block copolymer, 5%-25% of ethylene-octylene random copolymer and 5%-35% of ethylene-vinyl acetate resin. The foaming composite for shoes is light in mass, high in rebound resilience, low in permanent compression deformation rate, low in cost, wide in application range and simple in preparation method. By means of the foaming composite for shoes, the technical problems that existing shoe soles are not resistant to wear or compression, poor in low-temperature toughness, poor in strength, prone to deformation, low in cost performance and the like are solved.

Description

Technical field [0001] The invention relates to a foaming composition for shoes and a preparation method thereof, and belongs to the field of polymer materials. Background technique [0002] With the improvement of living standards, sports and fitness have become the norm in people's lives. Therefore, the requirements for lightness, elasticity and comfort of footwear, especially sports shoe sole materials, are getting higher and higher. Lightweight and high elasticity is the main feature of sports shoes, especially basketball, running and other sports have high requirements for the weight and resilience of the sole. Therefore, easy processing, light weight, comfort and high elasticity are the development directions of shoe materials. [0003] In the prior art, commonly used shoe sole materials are ethylene-vinyl acetate resin (EVA), styrene block copolymer (SEBS), ethylene-octene random copolymer (POE), and the like. In addition, in recent years, emerging thermoplastic polyuretha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/00C08L23/08C08L51/06C08K13/02C08K5/098C08K3/22C08K5/3492C08K3/36C08K5/14C08K3/34C08J9/10
Inventor 王旭熊祖江贯丽华
Owner CHINA LEATHER & FOOTWEAR IND RES INST
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