A method of extracting genuine leather fibers from waste finished leather

Abstract

The invention relates to a production method of simulation leather fiber raw materials, and provides a method for extracting dermal fibers by means of waste finished leather. According to the method, the waste leather is recycled and utilized, the utilization rate of resources is increased, a production technology is improved, on the condition that the quality of a finished product reaches the application standard, water consumption and electricity consumption can be greatly reduced, energy conservation is promoted, and the emission reduction effect is prominent. The method for extracting the dermal fibers by means of the waste finished leather comprises the following steps that 1, leftover materials are crushed into particle powder through a leather crusher, wherein the particle diameter ranges from 2 mm to 4 mm; 2, the particle powder is put into a drum for dyeing treatment; 3, the particle powder subjected to dyeing treatment is subjected to dehydration through a pass-type drying press ; 4, the particle powder subjected to dehydration is subjected to dehairing treatment through a dehairer, and fiber cotton is formed.

Description

technical field [0001] The invention relates to a method for producing artificial leather fiber raw materials, in particular to a method for extracting genuine leather fibers from waste finished leather. Background technique [0002] A large amount of leftovers are unavoidably produced in the process of leather production. Due to the small size of the leftovers, they cannot be used normally, which is one of the unavoidable costs for leather manufacturers. They are usually discarded directly, resulting in a waste of resources; because the leftovers are already used After the main tanning process of heavy metal chrome, whether it is leftovers or retanned waste leather, random disposal will cause environmental pollution. Therefore, the disposal of waste leather leftovers has become a trouble for manufacturers. [0003] Therefore, recycling waste leather and leftovers produced is one of the methods to solve this problem. In the prior art, these waste leathers are usually recycle...

AI Technical Summary

Problems solved by technology

[0002] A large amount of leftovers are unavoidably produced in the process of leather production. Due to the small size of the leftovers, they cannot be used normally, which is one of the unavoidable costs for leather manufacturers. They are usually discarded directly, resulting in a waste of resources; because the leftovers are already used After the main tanning process of heavy metal chrome, whether it is leftovers or retanned into finished products, discarding them at will will cause environmental pollution. Therefore, it has become a trouble for manufacturers to dispose of waste leather leftovers.

[0003] Therefore, recycling waste leather and leftovers produced is one of the methods to solve this problem. In the prior art, these waste leathers are usually recycled into bottom raw materials for making regenerated leather base cloth, PU leather or synthetic leather. It is fiber velvet, also known as cowhide velvet; its production method includes: first crushing the collected waste leather, then wooling the crushed leather block into fluff, then dyeing the fluff, and then dehydrating and drying in the sun. Finally, it is necessary to perform another hair removal to make the fiber treated with the solution fluffy and stretch, and only when it reaches the use standard can it become the raw material fiber fleece for making regenerated leather. However, due to the lightness of the fluff, a large amount of water needs to be used for soaking and covering during dyeing, and then dehydrated. The amount of water used is relatively large. The water consumption for making one ton of leather fibers is about 20-25 tons, and a second process is required. The second roughening will further wear down the fibers and cause fly ash, which will affect the texture of the fibers, shorten the length of the fibers, make the quality of the imitation leather poor, and pollute the air in the workshop. In addition, the consumption of electric energy for roughening also greatly increases the production cost.