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Method for preparing reduced leather based on combination of collagen fiber grey fabric, flocking process and solvent-free resin process

A technology of collagen fiber and solvent-free resin, which is applied in the direction of textiles and papermaking, can solve the problems of leather preparation in the finishing process, achieve rich hand feeling, improve flatness, and improve the effect of surface smoothness

Inactive Publication Date: 2017-11-21
徐琦
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the deficiencies in the prior art above, the purpose of the present invention is to provide a method for preparing reduced skin based on collagen fiber gray cloth combined with flocking process and solvent-free resin technology. The electrostatic flocking process is used to flock on one or both sides, and then undergo skin grinding treatment, and then make leather through a solvent-free film-forming process, so as to solve the problem that the current collagen fiber gray cloth cannot be prepared by the existing finishing process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1 Adopt the following steps to realize the present invention:

[0034] 1. Collagen fiber preparation: adopt the preparation method of collagen fiber for direct spinning in Example 2 of patent ZL201510228478.4, use wet blue leather as raw material and go through shearing, ultrasonic pretreatment, drum treatment, liquid fiber disintegration, and fiber The steps of drying, opening and removing impurities, carding, and fiber surface treatment are used to obtain collagen fibers, and then the collagen fibers are spun into yarn by spinning technology, and the base cloth is woven to obtain collagen fiber gray cloth; the specific steps are as follows:

[0035] (1) Cutting: use wet blue leather as raw material, and cut it into the size required by production or equipment with a leather shearing machine;

[0036] (2) Ultrasonic pretreatment: Prepare a polar solvent pretreatment solution rich in hydroxyl groups, adjust the pH to 7, raise the temperature to 45°C, complete...

Embodiment 2

[0054] Embodiment 2 The following steps are adopted to realize the preparation of reduced skin of the present invention:

[0055] 1. Preparation of collagen fiber gray cloth: adopt the preparation method of collagen fiber for direct spinning described in Example 4 of patent ZL201510228478.4, use wet blue leather as raw material and go through shearing, ultrasonic pretreatment, drum treatment, liquid The specific steps for producing collagen fibers are as follows:

[0056] (1) Cutting: use wet blue leather as raw material, and cut it into the size required by production or equipment with a leather shearing machine;

[0057] (2) Ultrasonic pretreatment: Prepare the pretreatment solution, adjust the pH to 7.5, raise the temperature to 40°C, completely immerse the cut wet blue leather in the pretreatment solution for 20 hours, then raise the temperature of the pretreatment solution to 60°C, and adjust the pH 7.5, then soak for 1 hour, and perform ultrasonic low-frequency short-te...

Embodiment 3

[0074] Embodiment 3 Use the following steps to realize the preparation of the reduced skin of the present invention:

[0075] 1. Preparation of collagen fiber gray cloth: adopt the preparation method of collagen fiber for direct spinning described in Example 3 of patent ZL201510228478.4, use wet blue leather as raw material through shearing, ultrasonic pretreatment, drum treatment, liquid Collagen fibers are obtained through the steps of fiber disintegration, fiber drying, opening and impurity removal, carding, and fiber surface treatment. The specific steps are as follows:

[0076] (1) Cutting: use wet blue leather as raw material, cut it into the size required by production or equipment with a leather shearing machine, immerse the wet blue leather raw material in a water pool for 2 to 5 minutes, and dry until the moisture content is 60 to 80%;

[0077] (2) Ultrasonic pretreatment: Prepare the pretreatment solution, adjust the pH to 7, raise the temperature to 50°C, completel...

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Abstract

The invention discloses a method for preparing reduced leather based on a combination of a collagen fiber grey fabric, a flocking process and a solvent-free resin process. According to the method provided by the invention, pretreatment is carried out on the collagen fiber grey fabric before flocking, and single-sided or double-sided flocking is realized on the surface of the grey fabric, so the roughness of the surface of the grey fabric is realized; a specific adhesive is employed in the process of flocking, and real hair from the body surface of an animal or artificial wool prepared from materials like nylon with better hydrophilic surface properties is selected on the basis of the characteristics of the grey fabric for flocking, so flocking effect and the surface roughness of the grey fabric are further improved; and an environment-friendly solvent-free film-forming process is employed for impregnation and surface finishing of a base layer (a base material). The reduced leather prepared by using the method provided by the invention has a full structure, good handfeel, outstanding mechanical properties and better comprehensive properties and cost performance than the comprehensive properties and cost performance of top-layer leather; and the method overcomes processing bottlenecks in preparation of the reduced leather from the gray fabric with collagen fibers as a raw material and prepares high-quality reduced leather products.

Description

technical field [0001] The invention relates to a method for preparing leather, in particular to a method for preparing reduced leather based on collagen fiber gray cloth combined with a flocking process and a solvent-free resin process, and belongs to the technical field of leather processing. Background technique [0002] Leather is an indispensable category of production and daily necessities in human life, and is widely used in many fields such as clothing, home furnishing, automobiles, and public services. The source of leather is only the skin of animals raised and hunted by humans, mainly cowhide, sheepskin, pigskin and some special leathers, such as crocodile skin, snake skin and even shark skin. Due to the improvement of human awareness of environmental protection, the hunting of wild animals is prohibited. Basically, the leather needed by humans currently comes from artificially raised domestic animals. Although with the improvement of human feeding technology, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/00D06N3/14D06N3/18D06N7/00
Inventor 徐琦
Owner 徐琦
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