Textile Technology: Key Technology And Application Of Natural Silk Fiber Netting Spunlace

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/span > < p > < a href= '> http://www.91se91.com/news/ > fiber spunlace < /a > nonwovens is safe, comfortable and functional, which determines its excellent application prospect in the field of disposable skin material for disposable sanitary products, medical dressing, band aid, cosmetic mask or other living products.

At present, there are few reports on silk related nonwoven technology and its products. The research and development of this topic has expanded the application field of silk fiber, made the form of products diversified and increased the added value, which is of great significance for promoting the technological progress of China's spunlaced nonwoven industry.

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< p > Key Technologies for processing silk Spunlaced cloth include pretreatment (bleaching, antistatic treatment, hydrophilic treatment technology, hydrophilic agent and antistatic agent), carding and reinforcement (double doffer combing technology, over feeding and pre wetting technology, high entanglement spunlace technology, water circulation treatment technology).

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< p > pretreatment key technology < /p >

< p > soda ash, hydrogen peroxide, silicone oil and antistatic agent were used to degumming, bleaching and antistatic treatment of silk fibers. The whiteness >75 decreased the mass specific resistance from 3.4 * 1011 ohm g/cm2 to 2 * 109~2 * 1010 ohm g/cm2, which improved the electrostatic effect in the process of silk precarding.

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< p > this research has determined the optimum parameters: the best concentration of antistatic agent is 0.2%, the impregnation temperature is 75 degrees, and the soaking time is 15min.

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< p > the main component of silk has a tight molecular structure and large resistance, which is difficult to adapt to the high-speed carding process and the hydrophilic demand of the final product.

The silk fibers were modified by hydrophilic additives A and hydrophilic assistant B through the screening of auxiliaries.

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< p > through data analysis < < a href= > http://www.91se91.com/news/index_c.asp > > href= > /a > water absorbency, specific resistance, oiling rate and carding test results, the optimum ratio of hydrophilic A and hydrophilic agent B is determined as 9: 1, the best reagent concentration is 0.3%, and the best drying temperature is 80 C.

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< p > orthogonal test was used to study the effect of different hydrophilic agents and antistatic agents.

The optimum technological conditions are as follows: the concentration of antistatic agent is 0.2%, the mass concentration of hydrophilic agent is 0.25%, the impregnation temperature is 80 degrees, the soaking time is 10min, the best settling time is 13.7s, and the mass specific resistance is 2.2 * 108.

Omega g/cm2.

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< p > the key technology of carding network is < /p >

< p > adopting two way loosening, mixing and carding system, the carding machine adopts double tin forest double doffer double condensing roller structure, and the net speed reaches 50m/min through silk fiber hydrophilic and antistatic treatment.

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< p > prewetting: with the technology of mesh over feeding, the mesh can be pferred smoothly to the first spunlace area of the drum to improve entanglement.

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< p > spunlace pressure: four spunlace reinforcement, using "low to high" pressure setting; pressure range (45-50-55-60bar) ~ (60-85-85-90bar).

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< p > spunlace pressure is low, strength is slightly lower, hand feeling is good, penetration time is long, spunlace pressure is high, strength is high, gloss is good, penetration time is short.

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< p > key technology of over feeding and pre wetting of silk fiber: improving fiber holding, achieving smooth pfer of pre wetting mesh, adjusting the direction of fiber alignment, and reducing the vertical and horizontal strength ratio of fiber mesh.

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< p > water treatment and water circulation < a href= "http://www.91se91.com" > process > /a >: process water, dewater tank, water vapor separator, water storage tank, air flotation device, storage tank, sand filter, water storage tank, tube filter, bag filter, process water.

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