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Manufacturing method for lasting bacterium resisting and inhibiting type leather

A manufacturing method and leather technology, which can be applied in the fields of leather impregnation, leather surface treatment, small raw hide/large raw hide/leather/fur treatment, etc. Problems such as poor washing resistance, to achieve the effect of improving comprehensive utilization value, improving color saturation and fastness of dyeing, and lasting antibacterial properties

Active Publication Date: 2016-12-14
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the direct use of chitosan quaternary ammonium salt has a fatal flaw: because chitosan quaternary ammonium salt is not easy to form a strong chemical bond with leather, only weak salt bonds and adsorption, so this method adopts physical blending and filling. The antibacterial material added by the method has poor washing resistance. As time goes by, the chitosan quaternary ammonium salt is prone to migration and loss, so it cannot maintain long-term antibacterial and antibacterial effects
In fact, this fatal defect is a common problem in general leather antibacterial treatment methods, which has been plagued by leather workers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] pre-tanning process

[0028] Pickling and pre-tanning: After 100Kg of goat alkali leather has been delimed and softened, add 80Kg of normal temperature water, add 8Kg of industrial salt, and rotate for 10 minutes; add 0.5Kg of formic acid (concentration 85%) diluted with 5Kg of water in advance, and rotate for 10 minutes; Add 0.4Kg sulfuric acid (98%) diluted with 8Kg water and rotate for 20 minutes; then add 0.4Kg sulfuric acid (98%) diluted with 8Kg water and rotate for 20 minutes; add 0.4Kg sulfuric acid (98%) diluted with 8Kg water and rotate 120 minutes; add 2Kg of oxidized N, N, N-trimethyl chitosan quaternary ammonium salt with an oxidation degree of 60%, and rotate for 90 minutes; stop the drum overnight, and rotate for 5 minutes every 120 minutes, before the end of pickling the next day Turn for 30 minutes;

[0029] Chrome tanning: Add 7Kg of chrome powder with an alkalinity of 33%, and rotate for 60 minutes; add 1Kg of sodium acetate, and rotate for 120 minut...

Embodiment 2

[0031] wet white process

[0032] Pre-tanning: 100Kg of oxalic leather is washed after softening and deliming, adding 100Kg of warm water at a temperature of 25°C, adding 4Kg of oxidized N-hydroxypropyltrimethylammonium chloride chitosan with an oxidation degree of 80%, and rotating for 180 minutes , let stand overnight;

[0033] Squeeze water: use a pass-through water squeezer to squeeze water, and the moisture content of the crust leather is required to be 50-55%;

[0034] Wrestling: Put the squeezed leather into the drum and rotate for 20 minutes;

[0035] Shave evenly: Shave evenly according to product requirements.

Embodiment 3

[0037] Retanning process

[0038] Retanning: 100Kg of wet blue leather, add 150Kg of water at a temperature of 35 to 40°C, add 3Kg of oxidized O-hydroxypropyltrimethylammonium chloride N-trimethyl chitosan with an oxidation degree of 30%, and rotate for 30 Minutes; add KMC chrome tanning powder 4Kg, Tannesco HN3Kg, and rotate for 90 minutes; dissolve 0.3Kg of baking soda in 5Kg of water, add to the drum in two times with an interval of 20 minutes; rotate for 40 minutes, stop the drum overnight.

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PUM

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Abstract

The invention discloses a manufacturing method for lasting bacterium resisting and inhibiting type leather. According to the manufacturing method, during pretanning, main tanning, retanning filling and dyeing, oxidization chitosan quaternary ammonium salt is used for treating the leather, formyl groups on the oxidization chitosan quaternary ammonium salt react with active groups on the leather so that the chitosan quaternary ammonium salt can be connected to the leather, and the bacterium resisting and inhibiting type leather is manufactured. The manufacturing method can be widely applied to the leather industry.

Description

technical field [0001] The invention relates to a manufacturing method of durable antibacterial and antibacterial leather, which is applied to the leather industry. Background technique [0002] Leather is a natural renewable resource. Due to its unique physical, chemical and biological properties, it has been used for thousands of years for tanning and is widely used in daily necessities, clothing, shoemaking, public facilities and other fields. Leather is protein and lacks antibacterial and antibacterial capabilities. During use, it will encounter various microorganisms. When people wear shoes, they will inevitably secrete sweat and residual dirt, which is very easy to breed bacteria and affect human health. Adding antibacterial agents in the process of leather production or in finished leather can make the leather kill or inhibit the reproduction of bacteria stuck on the leather, thus protecting our health. It is more common in leather to add antibacterial and antibacter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C3/28C14C9/02C14C11/00
CPCC14C3/28C14C9/02C14C11/00
Inventor 但卫华陈一宁但年华
Owner SICHUAN UNIV
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