Method for spinning cross-shaped multi-hole hollow short fibers with recycle polyester bottle chip

Abstract

Provided is a method for spinning cross-shaped multi-hole hollow short fibers with a recycle polyester bottle chip. The recycle polyester bottle chip is dried by a vacuum drum and then is subjected to melt spinning. The recycle polyester bottle chip enters a spinning box body by screw squeezing and is sprayed out from spinneret orifices of a cross-shaped multi-hole hollow spinneret plate, nascent fibers are obtained, then the processes such as cross air blow cooling forming, winding, bundling, drafting, curling, oiling, relaxation heat setting and cutting are carried out, and the cross-shaped multi-hole hollow short fibers with the fineness of 6.67-14.44 dtex are obtained. The spinneret orifices are formed in the cross-shaped multi-hole hollow spinneret plate, the spinneret orifices are distributed in an array mode, spinneret orifice inlets are guiding holes, and spinneret orifice outlets are spinneret capillary pores. A center arc hole group and four outer periphery arc hole groups are formed in the spinneret capillary pores. The four outer periphery arc hole groups and the center arc hole group form a cross-shaped structure. A spinning technology is improved, the spinneret plate is designed in an innovative mode, and the prepared cross-shaped multi-hole hollow short fibers have the advantages of being high in hollowness degree, good in rebound resilience, large in specific surface area, soft in hand feel, good in moisture absorbing and breathing performance and the like.

Description

technical field [0001] The invention relates to a method for spinning cross-porous hollow short fibers by using recycled polyester bottle flakes, and belongs to the technical field of synthetic fiber processing. Background technique [0002] The special-shaped hollow staple fiber production technology has important application value in the development of recycled polyester staple fiber. The original recycled polyester hollow staple fiber has only a single hole in each fiber, and the spinneret holes used are C-shaped, double-arc, three-arc, triangular, three-lobed, and five-lobed. Single-hole regenerated polyester hollow staple fiber has high rigidity and poor flexibility. When spinning thick denier yarn, the hollowness is about 15%, which makes it difficult to improve the resilience of the fiber. Moreover, the outer surface of the fiber is monotonous, and the single-hole short fiber is too thick. will be flattened and deformed. The porous hollow regenerated polyester stapl...

AI Technical Summary

Problems solved by technology

According to a large number of documents retrieved, there is no public report on the cross-hole hollow staple fibers prepared from recycled polyester bottle flakes and the cross-hole hollow spinnerets used.

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