Foaming thermoplastic polyurethane elastomer, preparation method and application

Abstract

The invention provides a foaming thermoplastic polyurethane elastomer which can solve the technical problems that the hardness, density, wear resistance, rebound rate and compression permanent deformation indicators of existing foaming thermoplastic polyurethane elastomers cannot meet requirements. The foaming thermoplastic polyurethane elastomer is characterized by being prepared from the following raw materials in parts by weight: 100 parts of a thermoplastic polyurethane elastomer, 3 to 10 parts of phenylene terephthamide fibers, 0.5 to 2.0 parts of polyimide, 1 to 3 parts of polytetrafluoroethylene fibers, 4 to 10 parts of ethylene-bis-stearamide and 0.3 to 2.5 parts of zinc borate. The foaming thermoplastic polyurethane elastomer disclosed by the invention improves the physical properties of the foaming thermoplastic polyurethane elastomer sneaker soles, and particularly shows that the density is further reduced, wear resistance is improved and rebound resilience is improved on the basis of maintaining relatively high hardness of the foaming thermoplastic polyurethane elastomer sneaker soles.

Description

technical field [0001] The invention belongs to the field of polymer composite materials, and in particular relates to a foamed thermoplastic polyurethane elastomer, a preparation method and an application. Background technique [0002] Foamed thermoplastic polyurethane elastomer (ETPU) is a microporous composite material with countless bubbles inside it, which is formed by physical or chemical foaming method based on thermoplastic polyurethane elastomer (TPU). Foamed thermoplastic polyurethane elastomer material has low density, high hardness and good resilience, and has been widely used in the fields of sports shoe soles and various packaging materials. [0003] Thermoplastic polyurethane elastomer is a polyurethane polymer composed of hard segment and soft segment materials. The hard segment of thermoplastic polyurethane elastomer endows polyurethane with hardness and rigidity, while the soft segment endows polyurethane with flexibility and toughness. Thermoplastic polyur...

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Problems solved by technology

Since the dispersibility of inorganic substances in thermoplastic polyurethane elastomers still cannot be completely resolved, in thermoplastic polyurethane elastomer compounds, inorganic particles have a tendency to agglomerate to varying degrees, resulting in thermoplastic polyurethane elastomers during foaming. High-pressure carbon dioxide is adsorbed around inorganic fillers of different particle sizes. After the pressure is released, cells of different sizes and openings are generated. As a result, foamed thermoplastic polyurethane elastomer particles have different cells and higher density, which cannot meet the requirements of high hardness. and low-density performance requirements, the presence of inorganic fillers also leads to reduced wear resistance of foamed thermoplastic polyurethane elastomer molded products

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