Silk fiber used for non-woven fabric and preparation method of silk fiber

Abstract

The invention discloses silk fiber used for a non-woven fabric and a preparation method of the silk fiber, and belongs to the technical field of nonwoven fabric materials. Pure natural mulberry silk is adopted, subjected to water-bath treatment by using a lithium bromide solution, then washed, and quickly dried, the stress in the silk is quickly changed, and modified silk with a certain degree ofbending is prepared. Compared with raw silk fiber, the bending degree of the modified silk fiber is greatly improved, strength is not significantly reduced, and the problems that through coating, blending, sericin bonding and other methods, the strength of cloth is improved unilaterally and the cloth is air permeable, moisture permeable and poor in softness can be solved. The modified silk fiber is excellent in performance, mild and free of stimulation, no other materials are introduced, the good performance of fibroin fiber can be give full play to and can serve as raw materials of a pure silk nonwoven fabric, the entanglement rate of silk in a spunlace silk nonwoven fabric is improved, the friction force in unit area is improved, and thus the strength of pure silk nonwoven fabric products is effectively improved.

Description

technical field [0001] The invention relates to a silk fiber used for nonwoven fabrics and a preparation method thereof, belonging to the technical field of nonwoven fabric materials. Background technique [0002] Silk is a natural protein fiber, containing 18 kinds of amino acids that are beneficial to the human body, and the protein content is more than 97%. Silk fibroin is the main body, and sericin is coated on the outside of silk fibroin to play a protective role. Silk fibroin is non-toxic, harmless, safe and reliable, has excellent biocompatibility, and is suitable for development and modification into new materials. Among them, the serine and threonine contained in it can delay aging, and the leucine can accelerate the metabolism of cells. These advantages of silk have led researchers to deepen their research on modified materials, such as impregnation, coating, grafting, blending, etc., to endow silk with different properties. [0003] At present, when silk is used...

AI Technical Summary

Problems solved by technology

[0003] At present, when silk is used as a raw material for processing spunlace pure silk non-woven fabrics, it is easy to cause disadvantages such as insufficient fabric strength and easy tearing of the fabric.

Therefore, researchers modify the fabric. The current methods are: (1) Improve the strength performance of the fabric by coating and impregnating a strong agent, but this will easily lead to a decrease in the breathability and moisture permeability of the fabric; (2) Through melting The method is to dissolve the sericin on the surface of the undegummed silk, and then dry it and use the sericin to bond the silk to each other to improve the strength of the cloth. However, the cloth obtained by this method has a relatively high hardness and poor softness; (3) through saturation The method of preparing curved silk with calcium salt can improve the bending degree of silk and increase the friction between silk, but the degree of bending of silk after this treatment is not enough, and the strength drops more, which limits the strength of cloth

(4) Non-woven fabrics are prepared by blending polyester, tencel and other fibers with silk. Although the strength of the fabric is improved, its practical value will be greatly reduced

[0004] Before the present invention was made, in the Chinese invention patent (CN100379915) "Silk denatured non-woven fabric containing sericin and its application", glutaraldehyde solution was used to fix sericin on silk fiber, and at the same time, surfactant was added to make it soft. , although it can improve the strength of silk non-woven fabrics, the melting and coagulation of sericin during the drying and cooling process will lead to poor hand feeling of the fabrics, and the added surfactants may dissolve and irritate the skin, and the added glutaraldehyde Toxic, causing irritation and loss of biocompatibility

The Chinese invention patent with the publication number CN105671790A provides a silk air-through non-woven fabric, which uses the melting and bonding effect of ES fibers with a melting point of 130°C to bond the silk non-woven fabric to each other to increase the strength. , but the high temperature will destroy the silk fiber, and the addition of chemical fiber ES fiber may reduce the skin affinity and biocompatibility of pure silk

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