Preparation method of urethane elastic fiber with function of resisting electromagnetic radiation

Abstract

The invention relates to a preparation method of a urethane elastic fiber with a function of resisting electromagnetic radiation. The preparation method comprises the following steps: sequentially adding dimethylacetamide and polytetramethylene ether glycol into a pre-polymerizing tank; then, precisely adding 4, 4-diphenylmethane diisocyanate in a certain proportion of NCO / OH; heating to a set temperature and carrying out pre-polymerization reaction; after reaching the predetermined reaction time, adding diluting dimethylacetamide into the pre-polymerizing tank and stirring for a period of time; transferring pre-polymer liquor to a chain extending tank; cooling the pre-polymer liquor in the chain extending tank to about 10 DEG C through a refrigerant; then, slowly adding chain extending amine liquor; judging the terminal point of the reaction according to a current curve of a stirring motor; after chain extension, adding various additives such as a multiwalled carbon nanotube, an anti-yellowing assistant, an ultraviolet light resistant absorber, an antioxidant, a lubricant and a delustering agent; and preparing the urethane elastic fiber by polymerizing original liquor through dry spinning.

Description

technical field

[0001] The invention relates to a preparation method of spandex fiber with anti-electromagnetic radiation function, belonging to the field of polyurethane elastic fiber. Background technique

[0002] Electromagnetic waves are a form of energy that is widely used in industrial production and daily life. According to the frequency from high to low, it can be divided into seven categories: radio waves, microwaves, infrared rays, visible light, ultraviolet light, X-rays, and gamma rays. . Studies have proved that long-term exposure to electromagnetic radiation can easily cause human immunity to decline, metabolic disorders, male and female reproductive capacity decline, pregnant women are prone to miscarriage, fetal deformities and other hazards. Personal health plays an effective protective role. At present, the common anti-electromagnetic radiation materials mainly include stainless steel (authorized publication number: 101724968B), silver (authorized announc...