Preparation technology of high-strength environment-friendly synthetic leather

Abstract

The invention discloses a preparation technology of high-strength environment-friendly synthetic leather. The preparation technology comprises the steps of raw material metering, raw material high-speed stirring, uncoiling, surface film layer coating, primary plasticizing, foaming layer coating, bonding layer coating, knitted fabric pasting, secondary plasticizing, foaming, leather curling (paper-based curling), coating, embossing, packaging and warehousing. Magnetic particles are added into the coated foaming material and uniformly distributed in the foaming material; in the foaming process,an instantaneous strong magnetic field is alternately applied in a one-way or two-way mode in the thickness direction of the synthetic leather, and the magnetic field drives the magnetic particles toslightly move in a one-way or two-way reciprocating mode in the thickness direction of the synthetic leather; the prepared synthetic leather has better extensibility and flexibility, is closer to thetexture and hand feeling of natural leather, is not easy to curl and deform automatically, has better ductility, elasticity and deformation potential, has better softness, elasticity and hand feelingin the thickness direction, and is better in pressure resistance; and various mechanical properties of the synthetic leather are greatly enhanced.

Description

technical field [0001] The invention belongs to the technical field of synthetic leather, in particular to a preparation process of high-strength environment-friendly synthetic leather. Background technique [0002] A plastic product that simulates the composition and structure of natural leather and can be used as a substitute for it. Usually, the impregnated non-woven fabric is used as the mesh layer, and the microporous polyurethane layer is used as the grain layer. Its front and back are very similar to leather, and has a certain degree of air permeability, which is closer to natural leather than ordinary artificial leather. Widely used in making shoes, boots, bags and ball games. The foaming layer is required in the preparation process of synthetic leather. The purpose is to increase the pressing feel and air permeability of synthetic leather, making it closer to the visual, feel and experience of natural leather. The foaming process is a process of volume expansion, ...

AI Technical Summary

Problems solved by technology

The foaming layer is required in the preparation process of synthetic leather. The purpose is to increase the pressing feel and air permeability of synthetic leather, making it closer to the visual, feel and experience of natural leather. The foaming process is a process of volume expansion, but the foaming layer The expansion of the synthetic leather is carried out synchronously in all directions. Therefore, during the foaming process, tension will be generated on the face and thickness direction of the synthetic leather at the same time, and the tension on the face is unfavorable, which will cause pre-tension of the synthetic leather and reduce the strength of the synthetic leather. Hand feeling, such as softness, will also reduce the mechanical properties, ductility and deformation potential of synthetic leather, and it will also easily make synthetic leather curl or deform under static conditions

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