Solvent-free synthetic leather production method using rotation teflon and specially-used production line

Abstract

The invention provides a solvent-free synthetic leather production method using rotation teflon. According to the method, the teflon is used as a circulation type continuous conveying belt. The method includes the following steps that (1) the teflon conveying belt is coated with a synthetic leather raw material, so that a processing layer is obtained; (2) a base material is pressed and compounded onto the processing layer so that a composite layer can be obtained, and first-time heating curing is conducted; (3) the composite layer is stripped and coiled through the rotation of the teflon conveying belt, so that a finished synthetic leather product is obtained; (4) dust on the teflon conveying belt is cleaned in an on-line mode, and the first step is executed again or halting is carried out. The invention further provides a solvent-free synthetic leather specially-used production line using rotation teflon. According to the method, production resources are greatly saved, energy consumption is greatly reduced, environmental pollution is avoided, and the environmental protection effect is achieved; the number of operation steps can be reduced, and the production cost is lowered. The production line is simple and compact in structure and small in occupied space, an existing intermittent production mode can be replaced, and accordingly circulation continuous type synthetic leather production can be realized.

Description

technical field [0001] The invention relates to the technical field of synthetic leather manufacture, and more specifically relates to a solvent-free synthetic leather production method and a special production line using rotary Teflon. Background technique [0002] In the traditional synthetic leather production process, a large amount of organic solvents are used, and a large amount of organic solvents are also emitted. In recent years, due to the many advantages of solvent-free polyurethane production of synthetic leather: no organic solvents are used to greatly reduce waste gas and wastewater discharge, the process is shortened, labor is reduced and energy consumption is reduced, etc., it has gradually replaced the traditional synthetic leather production method. The characteristics of the process of producing synthetic leather from solvent-free polyurethane are: no organic solution or water is used in the synthesis, deployment, and use of polyurethane resin in the foam ...

AI Technical Summary

Problems solved by technology

[0006] 3. Every time the release paper is used, it needs manual cleaning, repairing and cutting

[0007] 4. Continuous production needs to use high temperature resistant tape to connect the release paper, and the interruption of the paper or the disconnection of the connection port during the production process has a great impact on production

[0008] 5. The length of each roll of release paper does not exceed 2000 meters, and the use time is generally within 100 minutes; in order to maintain continuous production, several rolls of release paper need to be used in turn, so that the production line needs to install a paper storage device, resulting in a complex structure of the production line and increased production costs. , and this intermittent production method greatly reduces production efficiency

[0009] 6. Due to the erosion of the silicone coating on the surface of the release paper by the active components of solvent-free polyurethane, the first layer of the release paper, the surface layer, is required to be dense, thick enough, and free of pinholes and craters, which increases the difficulty of the process and increased costs

Therefore, it is now possible to propose a solvent-free synthetic leather production method using rotary Teflon and a special production line for the production of synthetic leather, so as to avoid the above-mentioned defects caused by the use of release paper to produce synthetic leather

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