Formalizing method of high-strength and high-modulus polyvinyl alcohol fiber

Abstract

The invention discloses a formalizing method of high-strength and high-modulus polyvinyl alcohol fiber, which comprises the following steps: (1) preparing a swelling medium: dissolving 1-50 parts by weight of additive in 100 parts by weight of water and stirring to obtain the swelling medium; (2) pre-swelling the fiber: feeding the polyvinyl alcohol fiber bundle into the swelling medium to be swelled, wherein the temperature of the swelling medium is 20-80 DEG C and the swelling time is 10 to 60 minutes; and (3) formalizing the swelling fiber bundle: formalizing the swelled fiber bundle in an aldehyde condensation solution, wherein the formalizing temperature is 40-90 DEG C and the formalizing time is 10-40 min. The formalized polyvinyl alcohol fiber can be manufactured into short fiber or filament after being processed. The formalized high-strength and high-modulus polyvinyl alcohol fiber can be purely spun or blended with other fibers to manufacture textile threads and fabrics with various specifications, which are used for manufacturing high-strength wear-resistant work clothes, training clothes, tents, backpacks, ropes and the like, and has good popularization and application prospects.

Description

Formalization method of high-strength and high-modulus polyvinyl alcohol fiber technical field The invention relates to a method for formalizing high-strength and high-modulus polyvinyl alcohol fibers, which belongs to the technical field of high-performance fiber manufacture. Background technique Polyvinyl alcohol is a polymer with excellent performance and a wide range of uses. In Japan, North Korea, China, etc., polyvinyl alcohol fibers have been vigorously developed to solve people's clothing problems. However, with the rise of polyester, nylon and acrylic fibers with better performance and coming from behind, the application of polyvinyl alcohol fibers in the field of clothing has been greatly restricted due to shortcomings such as poor wrinkle resistance, unstable size, and poor dyeability. Due to its special structure, the fiber prepared by polyvinyl alcohol has the potential of high strength and high modulus. Therefore, various countries have turned to the develop...

AI Technical Summary

Problems solved by technology

Because the high-strength and high-modulus polyvinyl alcohol fiber has a dense structure, high crystallinity, and high degree of orientation, it is difficult for small molecules to penetrate into the interior of the fiber. The conventional formalization method often cannot effectively seal the hydroxyl groups in the amorphous region of the fiber. The degree of formalization of the fiber Low, the fiber after hydroformylation is still not resistant to boiling water