Preparation method and production equipment of skin-core composite fiber with high melt index and fiber rod thereof

Abstract

The invention provides a preparation method and production equipment for a skin-core composite fiber with a high melt index and its fiber rod, wherein the fiber includes a skin layer and a core layer arranged from outside to inside, and the skin layer is made of PE material and PP cooling masterbatch The PP cooling masterbatch accounts for 10% of the skin layer, the core layer is made of PP material, and the melting point of the skin layer is lower than the melting point of the core layer; the skin layer in the present invention is made of PE The material is made of PP cooling masterbatch. Based on PP cooling masterbatch, it has the characteristics of lowering the extrusion temperature (that is, lowering the melting point temperature) and increasing the resin melt index, so the temperature difference between the skin layer and the core layer increases, so that when preparing fibers When sticking, the hot-melt efficiency of the cortex at the same temperature will be higher than that of the cortex without adding PP cooling masterbatch in the prior art. It ensures the uniformity of the internal capillary structure after setting and curing, thus ensuring the capillary water absorption effect of the fiber rod.

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...

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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.

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