TPU/EVA supercritical foam composite material and preparation method thereof

A composite material and supercritical technology, applied in the field of foaming materials, can solve the problems of poor tensile strength, tear strength mechanical properties and performance, rough particle surface, large cell structure size, etc., to achieve stable quality improvement High durability, light weight, and high elongation at break

Inactive Publication Date: 2020-01-24
福建安达福新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 1. The foaming effect is not good, the size of the cell structure is large, uneven, and the surface of the particles is not smooth;
[0009] 2. Poor mechanical properties and performance such as tensile strength and tear strength

Method used

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  • TPU/EVA supercritical foam composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A kind of TPU / EVA supercritical foaming composite material, is made of the raw material that comprises following parts by weight:

[0045] 300-360 parts of thermoplastic polyurethane elastomer,

[0046] 66-73 parts of ethylene-vinyl acetate copolymer,

[0047] 25-33 parts of maleic anhydride graft modifier,

[0048] 9-14 parts of peroxide,

[0049] 1.2 to 1.6 parts of nucleating agent;

[0050] The thermoplastic polyurethane elastomer is a mixture of polyester polyurethane elastomer and polyether polyurethane elastomer;

[0051] The ethylene-vinyl acetate copolymer is a mixture of ethylene-vinyl acetate copolymer with a VA content of 25-30% and an ethylene-vinyl acetate copolymer with a VA content of 35-40% in a mass ratio of 1:1 ;

[0052] The maleic anhydride graft modifier is a polyethylene-grafted silicon-based modifier prepared by reacting epoxy-group-containing polysiloxane with a mass ratio of 1: (2-3) and maleic anhydride-grafted polyethylene. cluster copo...

Embodiment 2

[0067] A kind of TPU / EVA supercritical foaming composite material, is made of the raw material that comprises following parts by weight:

[0068] 300 parts of thermoplastic polyurethane elastomer,

[0069] 66 parts of ethylene-vinyl acetate copolymer,

[0070] 25 parts of maleic anhydride graft modifier,

[0071] 9 parts peroxide,

[0072] 1.2 parts of nucleating agent;

[0073] The thermoplastic polyurethane elastomer is a mixture of polyester polyurethane elastomer and polyether polyurethane elastomer;

[0074] The ethylene-vinyl acetate copolymer is a mixture of ethylene-vinyl acetate copolymer with a VA content of 25% and an ethylene-vinyl acetate copolymer with a VA content of 40% in a mass ratio of 1:1;

[0075] The maleic anhydride graft modifier is a polyethylene-grafted silicon-containing copolymer prepared by reacting epoxy-group-containing polysiloxane with maleic anhydride-grafted polyethylene at a mass ratio of 1:2.

[0076] In this embodiment, the mass ratio...

Embodiment 3

[0087] A kind of TPU / EVA supercritical foaming composite material, is made of the raw material that comprises following parts by weight:

[0088] Thermoplastic polyurethane elastomer 360 parts,

[0089] 73 parts of ethylene-vinyl acetate copolymer,

[0090] 33 parts of maleic anhydride graft modifier,

[0091] 14 parts peroxide,

[0092] 1.6 parts of nucleating agent;

[0093] The thermoplastic polyurethane elastomer is a mixture of polyester polyurethane elastomer and polyether polyurethane elastomer;

[0094] The ethylene-vinyl acetate copolymer is a mixture of ethylene-vinyl acetate copolymer with a VA content of 30% and an ethylene-vinyl acetate copolymer with a VA content of 35% in a mass ratio of 1:1;

[0095] The maleic anhydride graft modifier is a polyethylene-grafted silicon-group-containing copolymer prepared by reacting epoxy-group-containing polysiloxane with maleic anhydride-grafted polyethylene at a mass ratio of 1:3.

[0096] In this embodiment, the mass r...

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Abstract

The invention discloses a TPU/EVA supercritical foam composite material and a preparation method thereof. The TPU/EVA supercritical foam composite material is prepared from, by weight, 300-360 parts of a thermoplastic polyurethane elastomer, 66-73 parts of an ethylene-vinyl acetate copolymer, 25-33 parts of a maleic anhydride grafting modifier, 9-14 parts of peroxide and 1.2-1.6 parts of a nucleating agent. The TPU/EVA supercritical foam composite material has the advantages of good foaming effect, high foaming efficiency, uniform, small and dense cells, excellent mechanical properties and useproperties such as light weight and high strength, high tensile strength, large elongation at break, good mechanical properties, high tear strength, good tear resistance and low density.

Description

technical field [0001] The invention relates to the field of foam materials, in particular to a TPU / EVA supercritical foam composite material and a preparation method thereof. Background technique [0002] The name of TPU is thermoplastic polyurethane elastomer. It is mainly divided into polyester type and polyether type. It has a wide range of hardness (60HA-85HD), wear resistance, oil resistance, transparency, and good elasticity. It is widely used in daily necessities, sporting goods, toys, decorative materials and other fields. Halogen-free resistance Burning TPU can also replace soft PVC to meet environmental protection requirements in more and more fields. The so-called elastomer refers to a polymer material with glass transition temperature lower than room temperature, elongation at break > 50%, and better recovery after external force is removed. Polyurethane elastomer is a relatively special category of elastomers. Polyurethane elastomer has a wide range of har...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08L75/06C08L23/08C08L87/00C08K3/18C08K3/22C08J9/12
CPCC08J9/0061C08J9/0066C08J9/122C08J2203/06C08J2203/08C08J2375/08C08J2423/08C08J2475/06C08J2487/00
Inventor 丁尤权丁星懿丁雪峰
Owner 福建安达福新材料科技有限公司
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