Method for decreasing needling density of silk fiber mats

Abstract

The invention belongs to the technical field of textile processing and relates to a method for decreasing needling density of silk fiber mats. The method includes: under a negative pressure condition,performing negative-pressure adsorption on a fluffy silk fiber net, subjected to opening, carding and lapping, passing through a needling platform, wherein the adsorbed silk fiber net is contracted towards a negative-pressure operating direction to make the silk fiber net compact; enabling needles on an upper needling plate above the needling platform to perform needling on the silk fiber net. Bythe negative-pressure adsorption effect on silk fiber bundles under the negative-pressure condition, the problem of fluffiness of the silk fiber net due to softness and low density of silk fibers issolved, needling density is decreased on the premise of equal silk fiber mat volume density, silk fiber net conveying speed and needling frequency, and accordingly silk fiber mat needling efficiency and finished product quality are improved, and production cost is reduced.

Description

technical field [0001] The invention relates to a method for reducing the needle-punched density of silk fiber felt, which belongs to the technical field of textile processing. Background technique [0002] Mulberry silk is a natural animal protein fiber, rich in 18 kinds of amino acids needed by the human body, mainly composed of silk fibroin and sericin, and is the most important raw material for silk weaving. Mulberry silk has the advantages of moisture absorption, warmth retention, and breathability. Its touch is smooth and soft, warm in winter and cool in summer. It has a unique "siming" phenomenon when rubbed. It has good extensibility and good heat resistance. The production process of conventional silk fiber felt is to spread the silk fiber after opening and carding, and use a needle with a barbed thorn to penetrate several layers of silk fiber net for acupuncture. When the needle penetrates into the silk fiber net, the formed silk The fiber bundles pass through the...

AI Technical Summary

Problems solved by technology

While the silk fiber web is shrinking, the upper needling plate above the acupuncture table performs acupuncture on the shrunk silk fiber web. Since the silk fiber web reaches a compact state before acupuncture, the number of silk fibers per unit volume increases. , the lowering of the needle drives the increase of the amount of silk fiber in the silk fiber bundle, the increase of the amount of silk fiber per unit volume and the increase of the friction between the silk fibers lead to the tightness of the silk fiber bundle and the strengthening of the cohesion force, thereby strengthening the riveting effect of the silk fiber bundle , the interlayer strength between the silk fiber webs increases, and the silk fiber bundles overcome the problem of fluffy silk fiber webs caused by the low density and softness of silk fibers under the action of negative pressure adsorption, thereby improving the needle punching efficiency of silk fiber webs

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