| Traditional ring spinning technology can not meet people’s demand for high-end yarn products.How to develop a new type of yarn with high function and high added value is an urgent technical problem to be solved.The core-shell structure yarn prepared by composite spinning technology can effectively distribute materials with different functions and properties,and carry out linear optimization layout,so as to realize the complementary performance advantages between different materials and improve the added value of textile functions.However,there are still bottleneck problems in the existing spinning production technology for preparing core-shell composite yarn:1)it is difficult to effectively wrap a large amount of static air to form a steady-state hollow structure yarn;2)The low twist coated core is easy to leak,and the high twist coated core material has large torsional deformation and is easy to be damaged.In textile production and processing,core-shell composite yarn by friction spinning has high yarn forming speed and wide fiber applicability.Its biggest advantage is high coverage rate and uniform evenness,which has a good development prospect.Therefore,aiming at the technical problems of core-shell structure yarn forming,based on friction spinning technology,this paper innovatively applies elastic hollow linear materials,creates a nondestructive coating spinning method,and develops new performance and multifunctional core-shell structure composite yarn and its fabric products.Firstly,in this paper,a hollow cotton based（SCH）composite yarn and its fabric with core-shell structure are prepared by using the support structure of hollow materials and the coating mechanism of friction spinning technology,which are applied to heat insulation,heat preservation scenes.The results show that:compared with the traditional receding dimensional hollow core yarn,the SCH yarn fabric has excellent recovery ability with a compression resilience of 85.07%;better wrinkle resistance with a slow elastic recovery angle of 114.3°;and lasting insulation effect with only a 7.03%decrease in insulation rate after several compression experiments.It indicates that this method enhances the added values of stability,compression resilience,durability and warmth of hollow cotton textiles,and improves the defects of non-supported hollow structure yarns with poor compression deformation recovery performance.Subsequently,based on the combination of forward twist ring spinning and reverse twist friction spinning,this paper constructs a non-destructive coating spinning technology suitable for brittle basalt（BS）fiber materials.Through the friction spinning method,the inorganic/organic fiber composite with core-shell structure is successfully constructed BS@PI Yarn,and woven fabrics for high fire resistance fireproof clothing.The performance was characterized by a series of experiments,and the results showed that:compared with other samples,BS@PI yarn has excellent mechanical properties,with tensile strength of 16.88±1.06 N and knotting strength（5.86±0.73 N）36.63 times higher than that of BS filament（0.16±0.04 N）.Good thermal stability performance with 69.34%residual carbon at 800°C.Extremely strong the flame retardant property is 0.3 seconds after being ignited.In addition,the woven BS@PI fabric has good skin friendliness and excellent fire performance,with a personal thermal protection value of 33.71 cal/cm~2.Finally,the mass production of fireproof yarns and fabrics in this paper fully shows that the non-destructive spinning technology can fully realize industrial production.This continuously scalable manufacturing technology and excellent product performance provide an efficient commercial processing route for the application of inorganic fibers in wearable textiles. |
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