Manufacturing method of high-assignment secondary over-dyed frosted leather

A production method and value-assigning technology, which is applied in dyeing, leather dipping, small leather/big leather/leather/fur treatment, etc., to achieve excellent air permeability, improve the flatness and embossing of the leather surface, and increase the bursting strength. Effect

Active Publication Date: 2020-04-10
FENGAN LEATHER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the purpose of the present invention is to provide a method for making high-value secondary over-dyeing nubuck leather that solves the problem between low-grade raw material leather tanning and ecological development

Method used

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  • Manufacturing method of high-assignment secondary over-dyed frosted leather
  • Manufacturing method of high-assignment secondary over-dyed frosted leather
  • Manufacturing method of high-assignment secondary over-dyed frosted leather

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Embodiment Construction

[0021] In order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific examples.

[0022] The invention discloses a method for making high-value secondary over-dyeing nubuck leather, which comprises a material preparation process, a retanning process, a neutralization process, a filling dyeing process, a fatliquoring and re-dyeing process, an acid fixing process, a primary drying process, and a grinding process, which are carried out sequentially. Leather process, secondary coloring process, secondary drying process and surface coating process, etc. Among them, the material preparation process (including the steps of material preparation, water squeezing, shaving and weighing), acid fixation process, primary drying process, secondary drying process and surface coating process are all conventional processes, and conventional operations known in the industry can be adopted. , which will not be ...

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PUM

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Abstract

The invention discloses a manufacturing method of high-assignment secondary over-dyed frosted leather. The manufacturing method comprises a material preparation procedure, a retanning procedure, a neutralizing procedure, a filling dyeing procedure, a fat liquoring and re-dyeing procedure, a primary drying procedure, a leather buffing procedure and a secondary over-dying procedure which are sequentially carried out. Compared with the prior art, the method adopting the secondary over-dyeing technology, adopting an environmentally-friendly aldehyde tanning agent and an environmentally-friendly synthetic tanning agent to replace conventional chromium powder for tanning and adopting a natural vegetable tanning agent as an environmentally-friendly filling agent to supplement the tanning agent has the advantages of filling cover, improvement of the flatness and the embossing property of the leather surface in a multilayer, high-dimensional and all-around mode, solving of the problem of balance between low-grade raw material leather making and ecological development, successful upgrading of the low-grade raw material leather into the environmentally-friendly leather product with the high additional values, efficient utilization of resources, and remarkable improvement of the additional values of the low-grade raw material leather and the utilization rate of the finished leather.

Description

technical field [0001] The invention relates to a method for making leather, in particular to a method for making high-value secondary over-dyed nubuck leather. Background technique [0002] With the continuous improvement of consumption level, people's requirements for leather products are also constantly upgrading. While satisfying wearing comfort, they also require fashionable, beautiful and high-end products, which promotes the development of leather product quality to a higher level. The main problem currently plaguing tanning production is that there are too many defects in low-grade raw leather. The traditional process can only make up for the defects by repainting and producing some low-end products, which cannot meet market demand, and the raw materials for painting are toxic and harmful. It is not conducive to health, and because traditional crafts mostly use chrome powder for tanning, it is impossible to achieve scientific development and ecological integration wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C3/08C14C3/10C14C3/22C14C9/02C14C3/28D06P1/52D06P1/44D06P1/34D06P1/651D06P3/32
CPCC14C3/08C14C3/10C14C3/22C14C3/28C14C9/02D06P1/34D06P1/445D06P1/5257D06P1/65125D06P3/32
Inventor 阎兰周李建华邹佳明张安元
Owner FENGAN LEATHER
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