Method for processing island ultra-thin fiber high-density needling non-woven fabrics emulation leather

Abstract

The invention relates to a method for machining an island superfine fiber high density pinprick non-woven fabrics artificial leather, which is applied to the artificial leather manufacture and comprises the following processes: (1) the foundation process; (2) the PU wet method dipping process; (3) the continuous alkali abatement fiber opening process; (4) the pigmentation, the flexible tentering and shaping, the peached finish on two sides by a roughing-up machine; (5) the post treatments such as the dry method facing. The method is characterized in that the following processes are performed between the (4) process and the (5) process which are as follows: (6) the rolling blanching at a high temperature of 80 to 120 DEG C; (7) the high concentration polyurethane DMF solution with a weight ratio of PU: DMF of 100:50-93 is coated on the single side of the fabrics; (8) the time delay of 30 to 80 seconds; (9) a low temperature of 10 to 15 DEG C high concentration of 15 to 25 percent of DMF solution coagulating basin is coagulated, washed by water, dried and wrapped up. The method has the advantages that the manufactured finished leather has even thickness, excellent anti-tear strength and good ventilation property, the shortcoming that the cross breaks of the fibril synthetic leather is concave is overcome; the single spreading effectively avoids the foaming phenomenon on the coating surface; the section color is constant, etc.

Description

technical field [0001] The invention relates to a processing method for sea-island superfine fiber high-density needle-punched non-woven artificial leather, which is applied to manufacture artificial leather. Background technique [0002] People have put forward higher requirements for natural leather substitutes, not only requiring the surface texture structure of the imitation product, the physical properties of the product, and the feel to be similar to genuine leather, but also requiring the cross-sectional structure of the imitation product to be similar to that of natural leather. The cross-sectional structure of natural leather from the bottom layer to the surface layer is 0.01-0.5D ultrafine fiber structure, mesh microporous structure and dense fine pore structure. [0003] The surface texture structure of the current PU synthetic leather is similar to that of natural leather, and its processing procedure is dry veneer. [0004] In order to further obtain the simila...

AI Technical Summary

Problems solved by technology

However, there are still great differences between the surface layer of dense fine-pore tissue and natural leather.

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