求翻译：7、TPU底：全称热塑性聚氨酯弹性体（Thermoplastic Polyurethane），它是由二异氰酸酯和大分子多元醇、扩链剂共同反应生成的线性高分子材料，是一种新型的环保材料。是什么意思？

7, the end of the TPU: full name of the thermoplastic polyurethane elastomer (Thermoplastic Polyurethane), it is by the diisocyanate and macromolecular polyol, chain extenders common reaction of the linear polymer material, is a novel, environmentally friendly materials.

Bottom 7: full name, TPU thermoplastic polyurethane elastomers (Thermoplastic Polyurethane), it is made of 2 polyisocyanate and large molecules polyol, extended chain, common reactions that produce a linear polymer, which is a new environmentally friendly materials.

7th, TPU bottom: The full title thermosplastic polyurethane elastomer (Thermoplastic Polyurethane), it is by two isocyanogen diethylene glycol dinitrate and the macro-molecule polyols, the chain extendor responded together the production the linear high polymer material, is one kind of new environme

7, TPU bottom: full name of thermoplastic polyurethane elastomer (Thermoplastic Polyurethane), it consists of diisocyanate and polyol of macromolecules, chain-extending agent common to produce a linear polymer, is a new type of environmentally friendly materials.

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