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Transparent leather and preparation method thereof

A leather and transparent technology, applied in leather drying, leather/skin/leather/hide chemical treatment equipment, leather surface mechanical treatment, etc., can solve the problem of large amount of transparent liquid, limiting practical application value, affecting natural properties of natural leather products, etc. problem, achieve the effect of improving application value, increasing shrinkage temperature, and maintaining natural characteristics

Active Publication Date: 2019-08-30
浙江通天星集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when soaking and softening bare leather with transparent liquid, the amount of transparent liquid used is large, and the resulting leather products contain a large amount of unnatural ingredients, which affect the natural properties of natural leather products
At the same time, the shrinkage temperature of the obtained transparent leather products is low, which limits the practical application value

Method used

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  • Transparent leather and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take the wet blue leather obtained after chrome tanning as the raw material (thickness 0.4mm), air it to semi-dry after riding the horse, and soak it in the 1-ethyl-3-methylimidazolium bromide / acetone compound solution (5%) , Make the material-liquid ratio 1:1.5, change the liquid 3 times, apply mechanical action with a rotating drum, rotate speed 10r / min, temperature 45℃, and total treatment time 12h. Observe the penetration through the incision. After the infiltration is completed, the skin surface is thoroughly cleaned with acetone, and then immersed in clean water for 1 hour to make the ionic liquid and organic solvent seep into the water. Take out the leather blank, ride a horse to air dry, and obtain a transparent tanned leather blank after calendering treatment at 110°C. After collecting, filtering and evaporating the above-mentioned waste liquid, acetone and ionic liquid are recovered, and the recovery rates are 70% and 98.6%, respectively. The light transmitta...

Embodiment 2

[0028] Take the wet blue leather obtained after chrome tanning as the raw material (with a thickness of 0.9mm), air it to semi-dry after riding the horse, and soak it in 1-ethyl-3-methylimidazole acetate / absolute ethanol compound solution (45 %), set the material-liquid ratio to 1:0.6, change the liquid once, apply mechanical action with a rotating drum, rotate speed 12r / min, temperature 40°C, and total treatment time 7.5h. Observe the penetration through the incision. After the infiltration is completed, the skin surface is thoroughly cleaned with absolute ethanol, and then immersed in clean water for 1.5 hours to make the ionic liquid and organic solvent seep out into the water. Take out the leather blank, dry it, and obtain a transparent tanned leather blank after calendering at 140°C. After collecting, filtering and evaporating the above-mentioned waste liquid, anhydrous ethanol and ionic liquid are recovered, and the recovery rates are 75% and 97.8%, respectively. The li...

Embodiment 3

[0030] Take the bare skin after retanning and dyeing (the color is red) as the raw material (thickness is 1.4mm), air it to semi-dry after riding the horse, and soak it in 1-butyl-3-methylimidazole hexafluorophosphate / In the water compound solution (25%), the material-to-liquid ratio is 1:1, the solution is changed twice, and the mechanical action is applied by the rotating drum, the rotating speed is 8r / min, the temperature is 50°C, and the total treatment time is 3h. Observe the penetration through the incision. After the infiltration is completed, the skin surface is thoroughly cleaned with running water, and then immersed in clean water for 1.5 hours to make the ionic liquid seep into the water. Take out the leather blank, dry it, and obtain a transparent tanned leather blank after calendering at 80°C. After collecting, filtering and evaporating the above-mentioned waste liquid, the ionic liquid was recovered with a recovery rate of 98.0%. The light transmittance of the ...

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Abstract

The invention relates to transparent leather, wherein transparency of the transparent leather is 46-74%, the shrinkage temperature is 90-110 DEG C, and the thickness is 0.4-1.4 mm. The invention further provides a preparation method of the transparent leather. The preparation method comprises the following steps: providing a tanned leather blank as a raw material; carrying out immersion treatmenton the leather blank by adopting an ionic liquid compound liquid, and carrying out mechanical treatment on the mixture of the ionic liquid compound liquid and the leather blank through a rotary drum;cleaning the surface of the leather blank, and then soaking the leather blank into clear water; and taking out the leather blank, airing the leather blank, and then carrying out calendering treatmenton the leather blank.

Description

Technical field [0001] The invention relates to a transparent leather and a preparation method thereof, in particular to a transparent leather that maintains the natural properties of the leather and a preparation method thereof. Background technique [0002] The traditional tanning process includes multiple processes in the preparation section, tanning section and finishing section. The leather obtained after these processes has a large number of air-filled fiber pores inside, resulting in no obvious light transmittance and appearance. Out of opacity. With the growing demand for personalized and fashionable product styles in the consumer market, transparent leather with light-transmitting properties has attracted people's attention. [0003] At present, when preparing transparent leather in the prior art, the naked skin after ashing and softening is used as the raw material, the naked skin is soaked in an aqueous solution with an expansion agent, and then the expanded naked skin ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C15/00C14B1/58C14B1/44
CPCC14C15/00C14B1/58C14B1/44
Inventor 张敏丁翠翠杨振亚姚元清邓凤陈礼辉黄六莲
Owner 浙江通天星集团股份有限公司
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