High-resilience spandex slice

Abstract

A high-resilience spandex slice mainly comprises 20-60 parts of aliphatic linear non-branched polyester dihydric alcohol with the molecular weight 2000-3000, wherein the repeating unit contains more than 11 carbon atoms; 15-45 parts of polyether polyol with the molecular weight 1000-2000; 20-40 parts of diisocyanate, 5-15 parts of a chain extender, wherein the chain extender is dihydric alcohol with the molecular weight of 80-400; 0.1-1.0 part of an antioxidant, wherein the antioxidant is at least two kinds of antioxidants including hindered phenolic antioxidant, hindered amine antioxidant, thioester antioxidant and phosphite antioxidant; 0.1-1.0 part of a lubricant, wherein the lubricant at least two kinds of lubricants including stearates type lubricants, stearamide type lubricants, montan wax type lubricants, stearates type lubricants, oleamide type lubricants and cyclic butylene terephthalate type lubricants. The high-resilience spandex slice also comprises an organic tin catalyst, wherein the weight of the organic tin catalyst accounts for 0.01-0.1% of the total weight of the other raw materials. According to the invention, the molecular weight and the variety of the molecular weight of the polyether polyol are controlled, the types of the chain extender are controlled, the aggregative state of the spandex slice is adjusted to control the rebound resilience of the spandexslice to be more than 40%, dry-spinning spandex yarns are replaced and the high-resilience spandex slice is used for the special field with relatively high rebound resilience requirements.

Description

technical field [0001] The invention relates to the technical field of thermoplastic polyurethane materials, in particular to a high-resilience spandex slice. Background technique [0002] Polyurethane elastic fiber, referred to as PU fiber, is called Spandex in the United States, and is called spandex in Western Europe. The product name in my country is spandex. Spandex has the characteristics of good elasticity, fineness, high strength, high elongation, light specific gravity, soft hand feeling, good light resistance and excellent color fastness, and its physical and mechanical properties are very close to those of natural latex silk. Chemical degradation resistance, known as the "second skin". [0003] Spandex is generally not used alone, but mixed into fabrics in small amounts. The use of spandex can improve the elasticity and softness of textiles, endow light and thin fabrics with good elasticity, and also give thick fabrics smoothness, so that the wearing effect of f...

AI Technical Summary

Problems solved by technology

At present, melt-spun spandex is not as good as dry-spun spandex in terms of elastic recovery rate and heat resistance.

When the resilience of spandex yarn is insufficient, it is necessary to use a larger amount of spandex yarn to make the garment achieve high elasticity, which not only reduces the quality of the prepared garment, but also undoubtedly increases the cost

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