Nanometer polyurethane synthetic leather preparation method

Abstract

The invention relates to a nanometer polyurethane synthetic leather preparation method which comprises a work table, a limiting frame, a fixing mechanism, four cutting blades and a pressing and shaping mechanism, the limiting frame is mounted on the upper end surface of the work table, the limiting frame is of a concentric-square-shaped structure, the fixing mechanism is arranged above the work table, and the cutting blades are arranged on the fixing mechanism. The four cutting blades are arranged in a matrix mode, the pressing shaping mechanism is arranged on the work table, the fixing mechanism is used for fixing the position of the synthetic leather, the cutting blades are used for beveling the corners of the synthetic leather, and the edge of the synthetic leather is covered with the material of the synthetic leather. The pressing and shaping mechanism is used for positioning the folding position of the covered edge of the synthetic leather and then pressing and shaping, so that the subsequent sewing and shaping of the synthetic leather are facilitated, the covered edge position of the synthetic leather is accurate, and meanwhile, the covered edge efficiency of the synthetic leather is improved.

Description

technical field [0001] The invention relates to the technical field of synthetic leather production, in particular to a preparation method of nano polyurethane synthetic leather. Background technique [0002] Nano-polyurethane synthetic leather is synthetic leather made of nano-fillers; synthetic leather is a plastic product that simulates the composition and structure of natural leather and can be used as a substitute for it. The polyurethane layer is made as a grain layer. The front and back sides are very similar to leather, and have a certain degree of air permeability. It is closer to natural leather than ordinary artificial leather. Press the leather surface with your fingers, and there is no obvious pore wrinkle, such as pressing There are wrinkles at the end, and they will not disappear naturally. The leather surface has no pores, which is an important feature for distinguishing the true and false leather. The corners are burned after cutting, and there is a smell, b...

AI Technical Summary

Problems solved by technology

[0003] 1. Commonly used synthetic leather hemming is to use the cut synthetic leather for hemming, or directly use other fabrics for hemming. This kind of hemming method will reduce the aesthetics of the synthetic leather after molding. At the same time, other fabrics or leathers are used for hemming. Hemming needs to be folded to the edge of the synthetic leather and then processed, resulting in reduced processing efficiency;

[0004] 2. When hemming the synthetic leather, because the artificially folded hemming fabric or leather is used, the position of the hemming is not accurate, so that the hemming of the synthetic leather is not tight

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