Preparation process of composite environment-friendly synthetic leather

Abstract

The invention discloses a preparation process of composite environment-friendly synthetic leather. The preparation process comprises the steps of spinning, lapping, needling, non-woven fabric pretreatment, dipping, paste coating, solidification and film formation, washing, tentering and drying, cooling and embossing; spinning raw materials comprise polystyrene, polyamide and polyacrylonitrile; anda magnetic field is applied in the silk thread direction in the solidification and crystallization stage. The durability of synthetic leather base cloth under the environment of high-temperature andlong-time exposure to the sun is remarkably improved by utilizing good weather resistance, good solarization resistance and chemical reagent resistance of polyacrylonitrile, moreover, in a mode of applying the magnetic field in the solidification and crystallization stage, the crystallization orientation of the polyacrylonitrile is controlled and enhanced, the fiber density is increased, the fiberstrength is improved, therefore, the defect of low strength of the polyacrylonitrile is overcome, and the strength of the lapping silk threads is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of synthetic leather, in particular to a preparation process of composite environment-friendly synthetic leather. Background technique [0002] Natural leather is widely used in the production of daily necessities and industrial products due to its excellent natural characteristics. However, with the growth of the world population, the human demand for leather has doubled, and the limited amount of natural leather has long been unable to meet this demand. In order to solve this contradiction, scientists began to research and develop artificial leather and synthetic leather decades ago to make up for the deficiency of natural leather. The research history of more than 50 years is the process of artificial leather and synthetic leather challenging natural leather; for the automotive field, with the improvement of people's living standards, aesthetic requirements, and comfort requirements, leather interiors and...

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Problems solved by technology

[0003] The object of the present invention is to: provide a kind of preparation technology of composite environment-friendly synthetic leather, utilize polyacrylonitrile to have good weather resistance, good sun resistance and chemical reagent resistance to significantly improve synthetic leather base cloth in high temperature, long time explosion environment Under the durability, and by applying a magnetic field in the solidification and crystallization stage to control and enhance the crystal orientation of polyacrylonitrile, increase fiber density, improve fiber strength, so as to overcome the defect of low strength of polyacrylonitrile, to ensure the safety of the laying wire strength

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