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Method for improving dyeing fastness of light beige semi-vegetable tanned goat leather

A beige, semi-vegetable tanning technology, applied in dyeing, leather dipping, chemical treatment before tanning, etc., can solve the problems of reduced water absorption on the surface of dyed crust leather, poor color fastness on the surface of crust leather, and inability to quickly penetrate perspiration stains, etc. , to achieve the effect of consistent color, good color fastness and full coloring

Inactive Publication Date: 2012-06-20
JIHUA 3512 LEATHER & GARMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At the beginning of 2011, the company's sales staff got a piece of information from the market. A domestic company needs a large amount of light beige semi-vegetable tanned goat leather that is comfortable to wear, has good physical and chemical properties, and the product meets environmental protection requirements. When this information is transmitted to the company, the company fur The engineers quickly produced samples through continuous trial production, and submitted them to the customer. After passing the customer's strict inspection, they believed that the leather body was plump and the flexibility met the requirements, but the color fastness of the surface of the crust leather was poor, and the color difference between the sheets was large.
Faced with many color fixing agents, the engineer first chose Bayer zirconium ZB33 to fix the color of dyed crust leather with zirconium tanning agent in the later stage of dyeing. The color fastness of light beige semi-vegetable tanned goat leather has been tested by the customer, and the color fastness meets the customer's requirements; however, the water absorption performance of the dyed crust leather surface has indeed decreased. Due to the poor water absorption, the hat made after sweating when worn , sweat stains cannot penetrate quickly and feel very uncomfortable
[0005] In order to solve the defect of poor water absorption caused by improving the color fastness of light beige semi-vegetable tanned goat leather, engineers launched technical research and did a lot of comparative tests, and finally developed a product that meets the needs of customers and is comfortable to wear. , light beige semi-vegetable tanned goat leather with good physical and chemical properties, the light beige semi-vegetable tanned goat leather produced by the new method can not only ensure the color fastness of light beige semi-vegetable tanned goat leather, but also ensure its surface water absorption performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The technical requirements for the raw material leather are Hankou road goat wet blue leather with complete skin type, smooth and meticulous leather surface, no dead folds, no rough surface, no thick mid-ridge line, uniform color, lake blue, no ellagitation, excessive Tanning phenomenon: the leather body is plump, soft, elastic, without loose surface, the color of the incision is uniform, the whole sheet is tanned thoroughly, and there is no heart. First, according to the existing conventional process, the raw skins that meet the technical requirements are grouped, squeezed, rolled, shaved and trimmed. Follow the steps below:

[0047] A. Weighing: 1300 sheets with a weight of 500kg; used as the basis for materials used in subsequent processes.

[0048] B. The first water washing equipment: diameter 2500mm×2200mm miscellaneous wood drum, drum speed: 15 rpm

[0049] Operation method: wash with 1500kg42℃ water for 8 minutes, drain the waste liquid, then wash with 1500kg4...

Embodiment 2

[0075] Example 2 First of all, according to the existing conventional process, the raw hides that meet the technical requirements are grouped, squeezed, rolled, shaved and trimmed, and the thickness of the shaved is: 0.75mm; The technical requirement is the same as embodiment 1; Then, carry out by following step method:

[0076] A. Weighing: 1318 sheets with a weight of 500kg. As a basis for the use of materials in subsequent processes.

[0077] B, washing equipment for the first time: with embodiment 1, rotating drum speed: 16 revs / min;

[0078] Operation method: wash with 1500kg, 40°C water for 8 minutes, drain the waste liquid, then wash with 1500kg, 41°C water for 8 minutes, drain the waste liquid;

[0079] C, degreasing equipment, rotating drum rotating speed are the same as step B; Temperature: 40 ℃, all the other are the same as embodiment 1;

[0080] D. Secondary washing equipment and drum speed are the same as step B;

[0081] Operation method: with em...

Embodiment 3

[0093] Embodiment 3 This embodiment is the same as Embodiment 1 except for the following processes and techniques.

[0094] First, according to the existing conventional process, the raw hides that meet the technical requirements are grouped, squeezed, rolled, shaved and trimmed. The thickness of the shaved is: 0.75mm; The technical requirement is the same as embodiment 1; Then, carry out by following step method:

[0095] A. Weighing: 1289 sheets with a weight of 500kg. As a basis for the use of materials in subsequent processes.

[0096] B, washing equipment for the first time: with embodiment 1, rotating drum speed: 14 revs / min;

[0097] Operation method: wash with 1500kg, 42°C water for 8 minutes, drain the waste liquid, then wash with 1500kg, 41°C water for 8 minutes, drain the waste liquid;

[0098] C, degreasing equipment, rotating drum speed are the same as step B; temperature: 38°C, all the other are the same as embodiment 1;

[0099] D. Secondary washing equipmen...

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Abstract

The invention provides a method for improving the dyeing fastness of light beige semi-vegetable tanned goat leather; the method comprises the following steps of: carrying out group batching, wringing, grass ash tumbling, shaving and trimming on raw skins conforming to the technical requirements according to the traditional conventional process; and carrying out weighing, first washing, degreasing, second washing, oxalic acid treatment, third washing, chromium retanning, fourth washing, neutralization, fifth washing, dye filling, six washing, fat-liquoring and color fixing, and seven washing on trimmed blank skins. A light beige semi-vegetable tanned goat leather dye manufactured by the method is 1 / 3 of that manufactured by a conventional process without using a color fixing agent in consumption, i.e. the consumption is reduced by 2 / 3; and the absorption rate of waste liquid is high, thereby facilitating environmental protection. Manufactured semi-vegetable tanned goat leather finished products have consistent leather surface color, uniform color, full surface coloration, small color difference among pieces and full, pliable, setting-out and non-wrinkled leather body. The method has the outstanding advantage that the perspiration fastness is also improved while the dyeing fastness of the light beige semi-vegetable tanned goat leather is improved.

Description

technical field [0001] The invention belongs to the technical field of deep processing of tanning production, and mainly relates to light beige semi-vegetable tanned goat leather, in particular to a method for improving the color fastness of light beige semi-vegetable tanned goat leather. Background technique [0002] The leather industry is facing unprecedented challenges. Consumers have increasingly stringent requirements for leather, which has brought enormous pressure to leather workers. [0003] At the beginning of 2011, the company's sales staff got a piece of information from the market. A domestic company needs a large amount of light beige semi-vegetable tanned goat leather that is comfortable to wear, has good physical and chemical properties, and the product meets environmental protection requirements. When this information is transmitted to the company, the company fur The engineers quickly produced samples through continuous trial production, and submitted them ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C1/00C14C1/08C14C3/04C14C3/02C14C9/02D06P3/32
Inventor 李莉应依萍司利
Owner JIHUA 3512 LEATHER & GARMENT
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