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Circularly-tanning technology for chrome tanning liquor of sheep garment leather

A technology of liquid circulation and wool leather, which is applied in the field of chrome liquid circulation tanning technology, can solve the problems of flocculation, hexavalent chromium, and fluctuations in the quality of crust leather, and achieve the effect of pure white hair color, enhanced fatliquoring effect, and bright colors

Inactive Publication Date: 2014-04-23
ZHEJIANG ZHONGHUI FUR & LEATHER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a chrome liquid circulation tanning process for sheep clothing wool leather, to solve the need for flocculation, generation of hexavalent chromium, and fluctuations in the quality of crust leather, etc. question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A kind of chrome liquid circulation tanning process of sheep clothing hair leather, comprises the following steps:

[0040] Step 1, rewetting: before shearing, the sheep skin is rehydrated with a salt solution with a concentration of 80g / L at 35°C, the mass ratio of water to fur is 30, and the soaking time is 4 hours;

[0041] Step 2, drying, using a drying machine to remove excess water in the skin;

[0042] Step 3, shearing, use a shearing machine to shear the wool to make the plush fluffy, basically remove dirt and dust, and recycle the sheared wool;

[0043] Step 4, main immersion: Soak the sheepskin after shearing. The mass ratio of water to fur in the soaking solution is 20. The soaking solution is measured by water volume, including 1.5g / L of preservative, 25g / L of table salt, and 1.0g / L of penetrant. L, temperature 20°C, soak overnight for 14 hours;

[0044] Step 5, remove the flesh, after soaking in water, remove the remaining meat film on the surface of the ...

Embodiment 2

[0064] A kind of chrome liquid circulation tanning process of sheep clothing hair leather, comprises the following steps:

[0065] Step 1, rewetting: before shearing, the sheep skin is rehydrated with a salt solution with a concentration of 40g / L at 30°C, the mass ratio of water to fur is 20, and the soaking time is 4 hours;

[0066] Step 2, drying, using a drying machine to remove excess water in the skin;

[0067] Step 3, shearing, use a shearing machine to shear the wool to make the plush fluffy, basically remove dirt and dust, and recycle the sheared wool;

[0068] Step 4, main immersion: Soak the sheared sheepskin. The mass ratio of water to fur in the soaking solution is 20. The soaking solution is measured by water volume, including 1.5g / L of preservative, 15g / L of salt, and 1.0g / L of penetrant. L, temperature 20°C, soak overnight for 14 hours;

[0069] Step five, remove the meat;

[0070] Step 6, degreasing: the mass ratio of water to fur in the degreasing solution ...

Embodiment 3

[0091] A kind of chrome liquid circulation tanning process of sheep clothing hair leather, comprises the following steps:

[0092] Step 1, rewetting: before shearing, the sheepskin is rehydrated with a salt solution with a concentration of 30g / L at 30°C, the mass ratio of water to fur is 20, and the soaking time is 2h;

[0093] Step 2, spin dry;

[0094] Step three, shearing;

[0095] Step 4, main immersion: Soak the sheepskin after shearing. The mass ratio of water to fur in the soaking solution is 20. The soaking solution is measured by water volume, including 0.5g / L of preservative, 10g / L of table salt, and 0.5g / L of penetrant. L, temperature 20°C, soak overnight for 12 hours;

[0096] Step five, remove the meat;

[0097] Step 6, degreasing: the mass ratio of water to fur in the degreasing solution is 20, and the degreasing solution is measured by water volume, including 0.5 g / L of soda ash, 2 g / L of degreasing agent, and 0.5 g / L of penetrating agent, at a temperature of...

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Abstract

The invention discloses a circularly-tanning technology for chrome tanning liquor of sheep garment leather. The circularly-tanning technology comprises the following steps: conditioning, drying, shearing, main-soaking, fleshing, degreasing, pickling, softening, disacidifying, softening, pickling, tanning, wet grinding, retanning, neutralizing, adding grease, retanning, dyeing hair, and dyeing plates. According to the circularly-tanning technology for chrome tanning liquor of sheep garment leather, the formation of hexavalent chromium can be effectively reduced, and the chrome waste liquor flocculation is omitted. According to the test on the chrome content after the chrome tanning liquor is utilized, the chrome waste liquor can be recycled repeatedly by supplementing corresponding chrome powder during next-time recycling, thereby realizing the clean production of tanned leather industry. According to the circularly-tanning technology, the sealed no-emission utilization of a chrome resource can be guaranteed so as to greatly reduce environmental pollution, effectively lower waste water emission and save enterprise waste treatment and production cost. In addition, the quality of the produced leather is consistent with that of the common chrome tanned leather, the shrinkage temperature is above 100DEG C, and a leather body is soft, plump and flexible, is colorful, has pure white hair and has no effect on the dyed hair and the dyed plates.

Description

technical field [0001] The invention relates to a wool leather processing technology, in particular to a chrome liquid circulation tanning technology for sheep clothing wool leather. Background technique [0002] Chrome tanning is the method with the best tanning effect in the world at present. The leather obtained by chrome tanning has a high shrinkage temperature, good stability, and the finished leather is soft and plump and washable. Because leather produced by other methods always has quality defects, chrome tanning is difficult to be replaced in actual production. Because sheep clothing fur leather has very high requirements on wool and leather body, chrome tanning has always occupied an absolute dominant position in the field of sheep fur clothing and fur tanning. The cost of chrome waste water has doubled, seriously hampering the development of the fur industry. In order to alleviate the pressure of chrome tanning wastewater in the fur industry, the high absorption...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C14C3/02C14C3/06C14C3/28C14C1/08C14C1/06C14C1/04C14C1/00
Inventor 王学川李飞虎马建标沈跃庭王耀先胡建中强涛涛丁学斌
Owner ZHEJIANG ZHONGHUI FUR & LEATHER
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