A sea-island fiber synthetic leather base cloth and its production process

Abstract

The invention discloses a new type of sea-island fiber synthetic leather base cloth, which is composed of water-soluble sea-island fiber and forms a three-dimensional network structure network through acupuncture. The sea-island fiber needle-punched cloth layer is made of water-soluble PVA as the sea phase. Components, PA or PET materials are sea-island fibers composed of island phase components, which are made by laying nets and needle punching. The island phase components account for 60% to 85% of the fiber cross-sectional area, and the sea component accounts for 40% of the fiber cross-sectional area. ~15%, the sea-island fiber has a fineness of 1.6~14dtex, a breaking strength of 3~6cN / dtex, a breaking elongation of 7~10%, a single fiber fineness of the island component below 0.8dtex, and PVA is a water-soluble PVA masterbatch , melting point 180-190°C; melting range 175-195°C, thermal decomposition temperature 210°C-220°C. The production process of the base cloth is also disclosed. It solves the pollution problem caused by the preparation of composite fibers by organic solvent treatment of traditional PVA chips, and realizes the purpose of composite melt spinning with island phase resin.

Description

technical field [0001] The invention relates to the technical field of superfine fibers, in particular to a sea-island fiber synthetic leather base cloth and a production process thereof. Background technique [0002] In the past, fiber synthetic leather used woven fabrics and knitted fabrics, and was gradually replaced by needle-punched nonwoven fabrics and spunlace nonwoven fabrics. Synthetic leather products using woven or knitted fabrics as base fabrics have poor elasticity and unsatisfactory surface style, and can only produce medium and low-grade synthetic leather products; synthetic leather products using ordinary needle-punched fabrics and spunlace fabrics It has a certain imitation leather effect, but the fiber is thicker and the density of the base fabric structure is low, which cannot meet the requirements of high-end products; after entering the 21st century, with the advancement of microfiber manufacturing technology, superfine fiber from indeterminate islands a...

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Problems solved by technology

[0006] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a method to solve the pollution problem caused by the preparation of composite fibers by organic solvent treatment of traditional PVA slices, to achieve the purpose of composite melt spinning with island phase resins, and to enhance Sea-island fiber synthetic leather base cloth and its production process with continuous production and reduced labor intensity

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