Thermoplastic polyurethane elastomer foam material and preparation method thereof

Abstract

The invention discloses a thermoplastic polyurethane elastomer foam material, which is prepared from the following raw materials by weight: 80-100 parts of a thermoplastic polyurethane elastomer, 10-40 parts of a filler, 4-7 parts of a foaming agent, 0.6-1.5 parts of a cross-linking agent, 1.0-1.5 parts of a cross-linking assistant, 0.1-1.0 part of a mildew proof antibacterial agent and 1.2-2.0 parts of a lubricant. Adopting the above technical scheme, the invention has the beneficial effects of improving the foam expansion of the thermoplastic polyurethane foam material, expanding the scope of usage of the polyurethane foam material, and realizing compression deformation of a finished product produced from the thermoplastic polyurethane foam at no more than 35%, which is unmatched by an EVA foam material with equivalent foam expansion and similar elasticity. In addition, the foam material improves the performance of existing traditional foam materials, and solves the defects that polyester-type thermoplastic polyurethane elastomer has short service life, easily goes moldy on the product surface and generates mechanical performance loss in the field and damp and hot environment.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a thermoplastic polyurethane elastomer foaming material and a preparation method thereof. Background technique [0002] Thermoplastic polyurethane elastomer (TPU) is a special material that integrates the high elasticity of rubber and the molding processability of plastic, and has excellent comprehensive performance; compared with other thermoplastic elastomers, TPU has high strength, good elasticity, and wear resistance. , cold resistance, oil resistance, acid and alkali resistance, hydrolysis resistance, aging resistance, weather resistance, UV resistance, tear resistance, bending resistance, environmental protection and other excellent properties, widely used in industry, automobile manufacturing, shoemaking, wires and cables. [0003] However, due to the narrow processing temperature range of thermoplastic polyurethane elastomers, foamable thermoplastic polyurethanes can gen...

AI Technical Summary

Problems solved by technology

[0003] However, due to the narrow processing temperature range of thermoplastic polyurethane elastomers, foamable thermoplastic polyurethanes can generally only be manufactured with micro-foaming technology in the density range of 0.6-0.9g / cm 3 The outsole material of shoes is used to replace vulcanized rubber soles, so that the foamed thermoplastic polyurethane has the defect of extremely low expansion ratio, which in turn results in a smaller application range of foamed thermoplastic polyurethane. In this way, if ethylene- When vinyl acetate copolymer foaming material (EVA foaming material) is used to replace the foamed thermoplastic polyurethane with low expansion ratio, the permanent deformation of the material is large and the mechanical properties of the EVA foaming material are significantly reduced when the expansion ratio is high. , and there are defects such as poor wear resistance, which greatly reduces its performance. Therefore, the development of a thermoplastic polyurethane elastomer foaming material with a high expansion ratio and maintaining the excellent performance of thermoplastic polyurethane elastomers has become a goal of many universities and enterprises. the goal that is pursued

Images