Manufacturing technology for regenerated bark with high-tearing and high-peeling properties

Abstract

The invention discloses a manufacturing technology for regenerated bark with high-tearing and high-peeling properties. The manufacturing technology comprises steps that leather fibers form a net via cross-laying, direct laying, air laying or wet process; then the leather fibers are placed on the upper layer or the lower layer of chemical fibers after cross-laying or direct-laying via or without spunlaced pre-strengthening or spunlaced-strengthening; and after two layer overlapping, spunlaced composite strengthening, drying and slitting and rolling steps are conducted. Regeneration resource produced by artificial composite cloth and waste leftover material or discarded leather waste material works as main raw material and then new material low melting point fibers are added; the leather fibers are flexibly arranged on the first layer or the bottom layer or multi-layers with addition of chemical fibers and rolling weaving cloth as needed; with employment of splunced pre-strengthening, multi-splunced composite strengthening or direct composite-strengthening technologies based on the local conditions, splunced fiber composite cloth with high strength and meeting various demands of clients, simple structure and verities is achieved; and idealistic demands for high-tearing and high-peeling properties for artificial leather product update are met.

Description

technical field [0001] The invention relates to a composite cloth processing technology, in particular to a high-tear and high-stripping regenerated leather manufacturing process. Background technique [0002] The traditional leather industry is based on animal skins. In the whole tanning production process, the quality of the finished product only accounts for about 50% of the quality of the raw hide, and the rest is a large amount of solid waste. As a major tanning country, my country produces more than 1.4 million tons of leather scraps (including chromium-containing leather scraps) every year, accounting for almost half of the world's leather scraps. Since my country's tanning enterprises mainly use the sheet blue leather process, the proportion of chromium-containing waste is relatively high. [0003] With the rapid development of the tanning industry, the amount of tanning solid waste continues to increase, which makes the leather industry face severe challenges ...

AI Technical Summary

Problems solved by technology

If the landfill treatment is carried out, the chromium in the waste will cause serious pollution to the soil, and due to the restrictions of the world's environmental protection regulations, fewer and fewer places that can be used to bury solid waste, and the high cost of pollution control, the landfill method It is already difficult to implement; if the burning method is adopted, the trivalent chromium in the chromium-containing solid waste will be oxidized to hexavalent chromium during the incineration process, and the hexavalent chromium is a kind of ingestion poison / inhalation poison, skin contact That is, it may cause hereditary gene defects, and it may cause cancer if inhaled, and it will have a long-lasting danger to the environment and will cause great harm to human health.

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