Microporous skin-core structured bi-component composite fiber preparation method

Abstract

The invention relates to a microporous skin-core structured bi-component composite fiber preparation method. The method includes steps: S1, adding a pore forming agent into polyethylene, feeding intoa melt screw extrusion equipment along with polyethylene terephthalate according to a mass ratio of 30:70-70:30 to obtain polyethylene spinning melt and polyethylene terephthalate spinning melt, and sending into a complex spinning manifold; S2, injecting the polyethylene spinning melt and polyethylene terephthalate spinning melt entering the complex spinning manifold into bi-component different passages of the complex spinning manifold respectively; S3, after bi-component melt compounded through the complex spinning manifold is jet from complex spinnerets, cooling and winding to form bi-component composite filament bundles, feeding the filament bundles into sliver drums through feeding wheels, and gathering the filament bundles in the multiple sliver drums to obtain gathered bundles; S4, subjecting the gathered bundles obtained in the step S3 to drafting, rolling and the like to form microporous skin-core structured bi-component composite fibers.

Description

technical field [0001] The invention belongs to the technical field of spinning, and in particular relates to a preparation method of a multi-porous sheath-core structure bicomponent composite fiber. Background technique [0002] At present, the global fiber industry is still in a period of in-depth adjustment. Under the rapid promotion of a new round of technological revolution and new consumption concepts, functionalization, greening, differentiation and flexibility have become new trends in the development of the chemical fiber industry. PE / PET (polyethylene / polyethylene terephthalic acid plastics), PE / PP (polyethylene / polypropylene) and other bi-component composite fibers have a low melting point in the cortex, and use thermal bonding to form non-woven fabrics. This industry The heat-bonded nonwovens used in the world use sheath-core fibers, and the melting point of the skin material is lower than that of the core layer. The conventional melting point component is used a...

AI Technical Summary

Problems solved by technology

However, the bicomponent fiber used as a hygienic material needs to be in contact with the skin, and it needs to be in contact with physiological fluids such as sweat, urine, and menstrual fluid during use. If the surface of the fiber is coated with a special oil, it is easily diluted by the physiological fluid It will reduce the efficacy, but at the same time, in order to prevent skin allergies, the oil concentration should not be too high

However, by adding functional masterbatches, the actual effect of functional masterbatches cannot be exerted due to failure to effectively contact with the outside air and liquid.

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