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Preparation method for environmentally-friendly waterproof mercerized suede leather

A production method and an environmentally friendly technology, applied in the field of leather manufacturing, can solve the problems of irregular pile uprighting and dumping, lower mechanical indicators such as leather tear resistance, and inconsistent color difference, etc., to achieve good softness and waterproof silky feeling , Large grain surface tear resistance, uniform color effect

Active Publication Date: 2019-03-29
FENGAN LEATHER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional waterproof suede has problems such as villi sticking and being too greasy; traditional suede has problems such as irregular pile erection and dumping, and poor visual effects. After wearing and using, it will pilling, so it cannot be used as a high-grade product. clothing items
Conventional waterproof oil fatliquor will lead to excessive softness of the leather body, which will make the side and belly loose, and it is easy to produce poor parts, resulting in a decrease in the mechanical indicators such as the tear resistance of the leather; the most serious problem is that the stability is not good, It is prone to greasy feeling, color flower, inconsistent color difference, etc. and the surface has poor touch and lacks silky feeling
During fatliquoring, conventional waterproof oil needs to be fatliued at 60 degrees Celsius (higher temperature conditions), which leads to higher requirements for equipment performance during the fatliquoring process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The preparation method of an environment-friendly waterproof mercerized suede leather of the present invention comprises the steps of material preparation, degreasing, water washing, retanning, alkali extraction, drainage, neutralization, filling and fatliquoring, acid fixation, water washing and drying, softening, and leather grinding in sequence. , Trimming process, wherein, material preparation includes the steps of material selection, water return, water squeezing, sheeting, peeling, trimming and weighing. In the present invention, the processes of material preparation, water washing, alkali extraction, drainage, acid fixation, water washing and drying, softening, leather grinding and trimming are all conventional processes, which will not be described in detail here. All amounts of materials hereinafter are in parts by weight.

[0024] In the material preparation process, cow wet blue hides are selected. In this embodiment, 100 parts of cow wet blue hides are selec...

Embodiment 2

[0039] The difference between this embodiment and embodiment 1 lies in the steps of retanning, neutralization and filling and fatliquoring.

[0040] In the retanning process, add 100 parts of wet blue leather and 100-120 parts of warm water at 30°C to the drum machine successively, then add 2.0 parts of Turkish chrome powder AB and 1.0 part of Turkish chrome tannin CR- 100, rotate for 60 minutes, then add 1.0 parts of chromium cross-linking agent MCS, and rotate the drum for 60 minutes, so that the charge on the surface and the inside of the wet blue leather is consistent, and the color of the blue leather is uniform. Then add 1.0 part of sodium formate and 0.4 part of sodium bicarbonate, and rotate the drum for 40 minutes. At this time, the pH of the leather is 3.8, and the high temperature shrinkage is over 95°C. Then add a certain proportion of water into the drum machine, wash and drain.

[0041] In the neutralization process, add 150 parts of water successively, add 2.5 ...

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PUM

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Abstract

The invention discloses a preparation method for environmentally-friendly waterproof mercerized suede leather. The preparation method comprises the steps of sequentially carrying out the processes ofretanning, neutralizing, packed fat liquoring and the like. According to the preparation method, a novel environmentally-friendly material is adopted in the packed fat liquoring process and is subjected to step-by-step fat liquoring for preparation, the prepared environmentally-friendly mercerized waterproof suede leather has a good silk-like feeling and writing effect, the trimming rate of the finished leather is low, the utilization rate of the leather is high, a technical process adopts step-by-step fat liquoring, so that the material absorption is sufficient and complete, the waste discharge is reduced, and the environmental protection treatment difficulty is lowered.

Description

technical field [0001] The invention relates to a method for producing leather, in particular to a method for producing environmentally friendly waterproof mercerized suede. Background technique [0002] Traditional waterproof suede has problems such as villi sticking and being too greasy; traditional suede has problems such as irregular pile erection and dumping, and poor visual effects. After wearing and using, it will pilling, so it cannot be used as a high-grade product. clothing items. Conventional waterproof oil fatliquor will lead to excessive softness of the leather body, which will make the side and belly loose, and it is easy to produce poor parts, resulting in a decrease in the mechanical indicators such as the tear resistance of the leather; the most serious problem is that the stability is not good, It is easy to cause greasy feeling, color flower, inconsistent color difference, etc. and the surface has poor touch and lacks silky feeling. During fatliquoring, ...

Claims

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Application Information

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IPC IPC(8): C14C9/02
CPCC14C9/02
Inventor 刘潜胡远辉
Owner FENGAN LEATHER
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