Kind of Yarn of Leather and Its Production Process

Abstract

This Invention provides a kind of leather yarn and its process of production, wherein the yarn is made of 1˜100% WT of leather fiber, being mechanically opened from leather, and 0˜99% WT of textile fiber. Leather fiber and textile fiber are disposed longitudinally, interlaced with each other and twisted together to form leather yarn. Process of making yarn of leather fiber is as follows: tanning animal pelage with conventional tanning process, then sorting, swelling, opening fiber, degumming, decoloring, edulcorating, grading, blending, clearing, carding, drawing, and spinning. This Invention can improve availability of animal pelage, broaden application field of animal pelage, and solve problems of low availability of animal pelage and reclamation and recycling of worn-out leather.

1 . A kind of yarn of leather fiber comprising 1˜100% WT of leather fiber mechanically opened from leather, 0˜99% WT of textile fiber, said leather fiber and said textile fiber being disposed longitudinally, interlaced with each other and twisted together to form said yarn of leather fiber. 
   
   
       2 . The kind of yarn of leather fiber of  claim 1 , wherein the length of said leather fiber is 10˜45 mm and its fineness is 0.3 D˜2.5 D. 
   
   
       3 . The kind of yarn of leather fiber of  claim 1 , wherein said leather fibers are made of pelage or leather from at least one animal selected from cattle, horses, mules, donkeys, camels, deer, goats, pigs, dogs, wolfs, rabbits, rats, kangaroos, crocodiles, fish, snakes. 
   
   
       4 . (canceled) 
   
   
       5 . (canceled) 
   
   
       6 . The kind of yarn of leather fiber of  claim 2 , wherein said leather fibers are made of pelage or leather from at least one animal selected from cattle, horses, mules, donkeys, camels, deer, goats, pigs, dogs, wolfs, rabbits, rats, kangaroos, crocodiles, fish, snakes. 
   
   
       7 . The kind of yarn of leather fiber of  claim 1 , wherein said textile fibers include at least one fiber selected from: natural fibers having cotton, hemp, silk, cashmere, wool, camel hair, rabbit hair, dog hair, down feather, chemical fibers having terylen, acrylic fiber, urethane elastic fiber, polyamide fiber, polypropylene, and fibers processed or extracted artificially having direct viscose, soy, milk, bamboo, test a fat. 
   
   
       8 . The kind of yarn of leather fiber of  claim 2 , wherein said textile fibers include at least one fiber selected from: natural fibers having cotton, hemp, silk, cashmere, wool, camel hair, rabbit hair, dog hair, down feather, chemical fibers having terylen, acrylic fiber, urethane elastic fiber, polyamide fiber, polypropylene, and fibers processed or extracted artificially having direct viscose, soy, milk, bamboo, test a fat. 
   
   
       9 . A method for making the yarn of leather fiber comprising following processes: Tanning animal pelage with conventional tanning process, then sorting, swelling, opening fiber, degumming, decoloring, edulcorating, grading, blending, clearing, carding, drawing, and spinning. 
   
   
       10 . The method for making the yarn of leather fiber of  claim 9 , wherein said swelling is to swell leathers with swelling agents and make them expanded and opened, swelling agents include Lamepon A (oleol amino-acid sodium), penetrating agent, high-efficiency wetting agent, lime and protease. 
   
   
       11 . The method for making the yarn of leather fiber of  claim 9 , wherein said opening fiber is performed with an Opening device comprising Delivering flat belt, delivering rollers, feeding rollers, feeding plate, pricker roll, grid, cage and beater. 
   
   
       12 . The method for making the yarn of leather fiber of  claim 9 , wherein said degumming is performed with AT leather degreasing agent, KN leather degreasing agent, AD leather degreasing agent. 
   
   
       13 . The method for making the yarn of leather fiber of  claim 9 , wherein said decoloring uses water solution of 5% of bleaching water (sodium hypochlorite) at temperature of 25˜30° C., stir leather fibers uniform for 20˜30 minutes, then remove water from leather fibers and dry them by baking. 
   
   
       14 . The method for making the yarn of leather fiber of  claim 9 , wherein said blending is operation of blending of graded leather fiber and textile fiber according to need and proportion, during blending process to spray preparation agent selected from animal oils, vegetable oils, mineral oils and synthetic fats in proportion of 0.1˜5% WT, or to add talcum powder in 0.5˜0.8% WT, so to make uniform blending of leather fibers and to reduce amplexation of leather fiber. 
   
   
       15 . The method for making the yarn of leather fiber of  claim 9 , wherein said drawing is to process with continuous 5-8 round of drawing to make qualified yarn string for spinning equipment. 
   
   
       16 . The method for making the yarn of leather fiber of  claim 9 , wherein said spinning is ring spinning, rotating cup spinning, blowing spinning or friction spun spinning for obtaining yarn of leather. 
   
   
       17 . The method for making the yarn of leather fiber of  claim 9 , wherein said yarn of leather fiber is made from cowhide:
 sorting: to sort cowhide leather, its leftover bits and pieces and recycled cowhide leather of different weight, thickness and size;   swelling: put sorted cowhide leathers into water solution of 2% of lamepon A, 1.5% of high-efficiency wetting agent, with liquor ratio of 500% at temperature of 28˜30° C., stir them uniform, to immerse them for 18 hours, then to wash them with clear water remove water and air dry;   opening fiber: this operation is performed with an opening device, the swelled cowhide leather is processed to leather fiber with length of 15˜45 mm and fineness of 1 d˜2.3 d.   degumming: put opened cowhide fiber into degreasing water solution of 5% wt of anion-nonion surface active agent and 6% of organic solvent (ph value is 7.5˜9.0), stir them uniform at room temperature and immerse them for 60 minutes, then wash with clear water and swing them dry; decoloring: put degummed cowhide fiber into water solution of 5% wt of bleaching water at temperature of 35˜37° C., immerse them for 35 minutes, then wash them with clear water and dry them by hot air blow;   edulcorating: card with conventional cotton opener and remove other impurity from cowhide fibers;   grading: separate cowhide fibers into various grades according to their thickness and length through airflow grading boxes.   
   
   
       18 . The method for making the yarn of leather fiber of  claim 9 , wherein said yarn of leather fiber is made from pigskin:
 swelling: put sorted pigskin into water solution of 1.8% of lamepon A, 1.3% of high-efficiency wetting agent, with liquor ratio of 550% at temperature of 28˜30° C., stir them uniform, to immerse them for 16 hours, then to wash them with clear water, remove water and air dry;   opening fiber: this operation is performed with an opening device, the swelled pigskin is processed to pigskin fiber of length of 10˜40 mm and fineness of 0.8 d˜2 d;   degumming: put opened pigskin fiber into degreasing water solution of 5% wt of surface active agent and 5% of organic solvent (ph value is 6.0˜8.0), stir them uniform at room temperature and immerse them for 45 minutes, then wash with clear water and swing them dry.   decoloring: put degummed pigskin fiber into water solution of 5% wt of bleaching water at temperature of 35˜37° C., immerse them for 30 minutes, then wash them with clear water and dry them by hot air blow.   
   
   
       19 . The method for making the yarn of leather fiber of  claim 9 , wherein said yarn of leather fiber is made from goatskin:
 Swelling: Put sorted goatskin into water solution of 1.5% of Lamepon A, 1% of high-efficiency wetting agent, with liquor ratio of 600% at temperature of 28˜30° C. stir them uniform, to immerse them for 15 hours, then to wash them with clear water, remove water and air dry.   Opening fiber: This operation is performed with an Opening device the swelled goatskin is processed to goatskin fiber of length of 16˜30 mm and fineness of 0.3 D˜1 D.   Degumming: Put opened goatskin fiber into degreasing water solution of 10% WT of AD leather degreasing agent (PH value is 7.0˜8.0), stir them uniform at room temperature and immerse them for 20 minutes, then wash with clear water and swing them dry.   Decoloring: Put degummed goatskin fiber into water solution of 5% WT of bleaching water at temperature of 25˜30° C.; stir them uniformly for 30 minutes, then wash them with clear water and dry them by hot air blow.   
   
   
       20 . The method for making the yarn of leather fiber of  claim 9 , wherein said yarn of leather fiber is made from carp fishskin:
 swelling: put sorted carp fishskin into water solution of 1.5% of lamepon A, 1.2% of high-efficiency wetting agent, with liquor ratio of 700% at temperature of 25˜30° C., stir them uniform, to immerse them for 8 hours, then to wash them with clear water, remove water and air dry;   opening fiber: this operation is performed with an opening device, the swelled carp fishskin is processed to carp fishskin fiber of length of 10˜30 mm and fineness of 0.3 d˜1 d;   degumming: put opened carp fishskin fiber into water solution of 4% wt of surface active agent and 4% of organic solvent (ph value is 6.5˜7.5), stir them uniform and immerse them for 15 minutes, then wash with clear water and swing them dry;   decoloring: put degummed carp fishskin fiber into water solution of 3% wt of bleaching water at temperature of 35˜37° C., stir them uniform for 20 minutes, then wash them with clear water and dry them by hot air blow.   
   
   
       21 . The method for making the yarn of leather fiber of  claim 9 , wherein said yarn of leather fiber is made from raw python:
 swelling: put sorted raw python skin into water solution of 1.5% of lamepon A, 1% of high-efficiency wetting agent, with liquor ratio of 800% at temperature of 25˜30° C., stir them uniform, to immerse them for 10 hours, then to wash them with clear water, remove water and air dry:   opening fiber: this operation is performed with an opening device, the swelled raw python skin is processed to raw python skin fiber of length of 10˜35 mm and fineness of 0.5 d˜1.8 d;   degumming: put opened raw python skin fiber into water solution of 10% wt of AP degreasing agent (ph value is 7.0˜8.0), stir them uniformly for 25 minutes, then wash with clear water and swing them dry.   decoloring: put degummed raw python skin fiber into water solution of 3% wt of bleaching water at temperature of 35˜37° C., stir them uniform for 25 minutes, then wash them with clear water and dry them by hot air blow.