Thermoplastic polyurethane composite foamed material and preparation method thereof
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A thermoplastic polyurethane and composite foaming technology, applied in the field of materials, can solve the problems of rigidity, irrationality and poor elasticity of materials
Active Publication Date: 2016-07-27
ANTA CHINA
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[0002] Due to the single material used in the formula and the irrationality of the formula, the current sports shoes have many deficiencies; the material is stiff, dense, and poor in elasticity, and the sole of the sports shoes quickly loses elasticity during repeated bounces and running. The cushioning performance becomes worse, and in order to reduce the density of sports shoes materials, the corresponding rebound and compression resistance properties will also be significantly reduced, which cannot meet people's requirements for light weight, softness, high elasticity and compression resistance of shoes at the same time
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[0052] Corresponding present invention also provides the preparation method of this thermoplastic polyurethane composite foaming material, comprises the following steps:
[0053] 1) Weigh the following components by mass parts: 10-25 parts of thermoplastic polyurethane, 35-45 parts of ethylene-vinyl acetate copolymer, 15-30 parts of polyolefin elastomer, 6-10 parts of polyethylene, EPDM rubber 6-18 parts, polybutadiene polymer 6-15 parts, filler 3-5 parts, stearic acid St0.4-0.6 parts, zinc stearate ZnSt0.8-1.4 parts;
[0054] 2) Put all the ingredients weighed in step 1) into a twin-screw extruder for mixing, the mixing time is 8 minutes to 10 minutes, and the temperature is 110°C to 115°C;
[0055] 3) The following components are weighed in parts by mass: 1.5-2.2 parts of zinc oxide ZnO, 0.1-0.4 parts of crosslinking agent, 0.7-1.0 parts of bridging agent and 2.5-3.5 parts of foaming agent;
[0056] 4) Add all the ingredients weighed in step 3) to the mixed materials in ste...
Embodiment 1～2
[0062] Embodiment 1~2, comparative example 1
[0063] Table 1: Blending formula of thermoplastic polyurethane composite foam material (parts)
[0064]
[0065]
[0066] Among them, the thermoplastic polyurethane is F160, the polyolefin thermoplastic elastomer is selected as Engage8450 and Engage8150, and the ratio of the two is 1:1; the polyethylene is selected as LDPE6520; the ethylene-vinyl acetate copolymer is selected as EVA40L-03; The selected model of EPDM rubber is IP3745.
[0067] Table 2: Properties of the thermoplastic polyurethane composite foam material obtained in Examples 1-2 and Comparative Example 1
[0068]
[0069]
[0070] Note: The data in Table 2 is the data obtained according to the national standard test method.
[0071] From the data described in Table 2, it can be seen that the thermoplastic polyurethane composite foaming material prepared by thermoplastic polyurethane in the present invention can obtain very ideal shoe material functiona...
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Abstract
The invention provides a thermoplastic polyurethane composite foamed material and a preparation method thereof. The thermoplastic polyurethane composite foamed material is prepared from 10-25 parts of polyurethane, 35-45 parts of ethylene-vinyl acetate copolymers, 15-30 parts of polyolefin elastomers, 6-10 parts of polyethylene, 6-18 parts of ethylene propylene diene monomers, 6-15 parts of polybutadiene polymers, 3-5 parts of filler, 1.5-2.2 parts of zinc oxide, 0.4-0.6 parts of stearic acid, 0.8-1.4 parts of zinc stearate, 0.1-0.4 parts of a cross-linking agent, 0.7-1.0 part of a bridging agent and 2.5-3.5 parts of a foaming agent. The thermoplastic polyurethane composite foamed material is high in rebound resilience, resistant to compression and good in tear resistance. The preparation method of the thermoplastic polyurethane composite foamed material comprises steps as follows: 1) components except zinc oxide, the cross-linking agent, the bridging agent and the foaming agent are weighed; 2) all the components weighed in the step 1) are mixed; 3) the rest components are weighed; 4) the components weighed in the step 3) are added to a material obtained after mixing in the step 2) for mixing; 5) granulation is performed; 6) foaming is performed.
Description
technical field [0001] The invention relates to the field of materials, in particular to a foam material for sports shoe soles and a preparation method thereof. Background technique [0002] Due to the single material used in the formula and the irrationality of the formula, the current sports shoes have many deficiencies; the material is stiff, dense, and poor in elasticity, and the sole of the sports shoes quickly loses elasticity during repeated bounces and running. The cushioning performance becomes worse, and in order to reduce the density of the sports shoe material, the corresponding performance of rebound and compression resistance will also be significantly reduced, which cannot meet people's requirements for light weight, softness, high elasticity and compression resistance of shoes at the same time. Contents of the invention [0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a soft, high-elastic foam for sp...
Claims
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