Sheath-core composite fiber with high melt index and preparation method and production equipment of fiber rod of sheath-core composite fiber

Abstract

The invention provides sheath-core composite fiber with a high melt index and preparation method and production equipment of a fiber rod of the sheath-core composite fiber. The fiber comprises a sheath layer and a core layer which are arranged from outside to inside; the sheath layer is prepared from a PE material and PP cooling master batch; the PP cooling master batch accounts for 10% of the sheath layer; the core layer is prepared from a PP material; and the melting point of the sheath layer is lower than that of the core layer. According to the invention, the sheath layer is prepared from the PE material and the PP cooling master batch, and the PP cooling master batch has the characteristics of reducing the extrusion temperature (namely reducing the melting point temperature) and improving the melt index of resin, so that the temperature difference between the sheath layer and the core layer is increased, and when the fiber rod is prepared, the hot melting efficiency of the sheath layer at the same temperature is higher than the hot melting efficiency of the sheath layer without the PP cooling master batch in the prior art; and meanwhile, due to the increase of the melt index, the molten sheath layer quickly flows, so that the uniformity of the internal capillary organization structure after setting and curing is ensured, and the capillary water absorption effect of the fiber rod is ensured.

Description

technical field [0001] The invention relates to the technical field of composite fiber production and preparation, in particular to a preparation method of a skin-core composite fiber with a high melt index and a fiber rod thereof. Background technique [0002] Composite fiber is to input two or more fiber-forming polymer melts or solutions into the same spinning assembly at the same time according to the different components, proportions, viscosities or varieties, and then in the appropriate part of the assembly. Converge, and form fibers by spraying from the same spinning hole, so that it can be realized-multiple aggregates exist on an infinitely long fiber at the same time, and this fiber is called a composite fiber. Composite fibers can be divided into double-layer type and multi-layer type according to the cross-sectional shape. Pattern type, Mosaic type, Multi-sea island type, Nebula type, etc. Among them, the two-component composite fiber is also called a conjugated...

AI Technical Summary

Problems solved by technology

[0004] However, the above skin-core composite fibers still have the problems of high melting temperature required in the process of preparing fiber rods and uneven internal capillary structure after curing, which not only leads to low production efficiency, but also leads to poor capillary water absorption. Therefore, On the basis of the above-mentioned prior art, it is urgent to improve a skin-core composite fiber with high preparation efficiency and good capillary water absorption effect.

Images