Unlock instant, AI-driven research and patent intelligence for your innovation.

No-metal tanning method for Ningxia Tan sheep skin capable of being directly dyed

A kind of Tan sheepskin, metal-free technology, applied in chemical treatment before tanning, small raw hide/big raw hide/leather/fur treatment, leather/skin/leather/raw hide chemical treatment equipment, etc. To solve the problems of poor fiber and/or skin performance, achieve the effect of uniform coloring, firmness, plumpness, softness and good strength

Active Publication Date: 2019-10-11
NINGXIA WUZHONG JINGYI FUR PROD
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the particularity of Tan sheep fur quilt, some chrome-free tanning methods for common fur such as sheep shearing cannot be used for Tan sheep fur.
Although a lot of research has been done on chrome-free or / and aldehyde-free tanning of Tan sheepskin in recent years, due to the poor performance of wool fibers and / or hides, or limitations in tanning technology, equipment used and cost, there is no such research yet. A method is widely used in actual production

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The metal-free tanning method of tan sheep skin directly dyed in this embodiment mainly includes the following steps in sequence:

[0037] (1) Softening: The water volume of the softening bath used is controlled to 20L water for each crust, adjust the water temperature to 35℃, add 20g / L igneous powder, 30g / L sodium chloride, 1.6g / L formic acid and 0.5g / L wetting agent F-HAC, dissolve by stroke, after measuring the pH of the bath liquid to be 3.0~3.2, add 0.2g / L 537 acid enzyme, after drawing evenly, put the defatted tan sheep skin into the softening bath liquid, and stroke for 60 minutes , After that, stroke intermittently, stroke time 4h;

[0038] (2) Acid pickling: Direct pickling operation in the softening bath, adding 1.8g / L sulfuric acid, diluting the sulfuric acid 20 times in advance, and cooling to a temperature of 25°C, intermittent strokes, time 4h, standing overnight, The next day the skin throws water;

[0039] (3) Tanning: add 25g / L sodium sulfate, 25g / L sodium ...

Embodiment 2

[0044] The metal-free tanning method of tan sheep skin directly dyed in this embodiment mainly includes the following steps in sequence:

[0045] (1) Softening: The amount of water used in the softening bath is 20L per tan sheepskin blank, adjust the water temperature to 35℃, add 25g / L anhydrous powder, 25g / L sodium chloride, 1.8g / L formic acid and 0.3g / L wetting agent F-HAC, dissolve by stroke, measure the pH of the softening bath to be 2.8~3.0, add 1.5g / L softening enzyme BRH to the softening bath, and put the defatted sheep skin into the softening bath Liquid, stroke for 60min, then intermittent stroke, stroke time 3h;

[0046] (2) Pickling: Direct pickling operation in the softening bath, first dilute sulfuric acid to 20 times in advance, and cool, then add 1.6g / L sulfuric acid to the softening bath, adjust the temperature to 25℃, and intermittently stroke. Time 3h, let it stand overnight, and shake the skin the next day;

[0047] (3) Tanning: add 20g / L sodium sulfate, 35g / L s...

Embodiment 3

[0051] The metal-free tanning method of tan sheep skin directly dyed in this embodiment mainly includes the following steps in sequence:

[0052] (1) Softening and pickling: the amount of softening bath used for softening is 25L of water for each tan sheep skin, adjust the water temperature to 35°C, add 20g / L igneous powder, 35g / L sodium chloride, 1.8g / L formic acid And 0.5g / L wetting agent HAC, stroke to dissolve, measure the pH of the softening bath to be 3.2~3.5, add 2.0g / L fur acid protease FA, after stroke evenly, put the degreasing tan sheep skin into the softening bath, stroke 60min, thereafter intermittent strokes, time 6h; add 1.8g / L sulfuric acid, first dilute sulfuric acid to 20 times and cool, temperature 28℃, intermittent strokes, stroke time 3h, stand overnight, the next day water;

[0053] (2) Tanning: Add 30g / L sodium sulfate, 30g / L sodium chloride, 0.8g / L formic acid, 12.0g / L polymer tanning agent TWS, and formic acid is used to adjust the pH value in the tanning ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
temperatureaaaaaaaaaa
Login to View More

Abstract

The invention relates to a no-metal tanning method for Ningxia Tan sheep skin capable of being directly dyed, and belongs to the technical field of Ningxia Tan sheep skin processing. Firstly, a Ningxia Tan sheep skin blank is softened in a softening bath solution, wherein the softening bath solution is prepared from a medium solution, neutral salt, an acidifying agent, a wetting agent and an acidsoftening enzyme; a chemical is additionally put into the softening bath solution for acid pickling operation; the acid-pickled Ningxia Tan sheep skin blank is fished out and placed in a tanning tankfor tanning, water is added into the tanning tank, and neutral salt, formic acid and a polymer tanning agent are added into the water to form a tanning solution; an alkalizing agent is directly addedinto the tanning solution for alkali extraction operation, and after alkali extraction operation, skin discharging and standing are conducted; a synthetic tanning agent and a protein powder filler areadded into a water medium, ammonia water, dye and a fatting agent are added into the water medium, skin putting and clearance paddling are conducted, after the color is inspected to be qualified, formic acid is added three times, clearance paddling is conducted, and then drying and finishing are conducted. According to the method, the use and discharge of chromium-free compounds are involved in the whole production process, and the product does not contain trivalent chromium or hexavalent chromium.

Description

Technical field: [0001] The invention relates to the technical field of tan sheep skin processing, in particular to a metal-free tanning method for tan sheep skin that can be directly dyed. Background technique: [0002] Tan sheep skin is a kind of sheep animal skin produced in Ningxia region of my country. The hair on its back is 7-8cm long, the undercoat is less, the roots are clear, the hair strands are non-adhesive and are in the shape of a spike, and there are 7-9 wavy bends, commonly known as "nine bends". The hair is long, soft, flexible and smooth. . In view of the characteristics of the tan sheep fur quilt, its tanning process is different from the general sheep skin tanning method, that is, the fur fiber must be protected from damage during the tanning process, and the curved pattern structure of the hair can be maintained after tanning. . [0003] At present, the most common tanning method of Tan sheepskin is formaldehyde tanning or formaldehyde-aluminum tanning. If d...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C14C1/04C14C1/08C14C3/04C14C3/22C14C3/08C14C15/00
CPCC14C1/04C14C1/08C14C3/04C14C3/22C14C3/08C14C15/00
Inventor 张宗才马维宁马维荣马莉焘吴博嘉
Owner NINGXIA WUZHONG JINGYI FUR PROD