Orange-slice-like structured composite fiber with controllable bonding strength and preparation process of composite fiber

Abstract

The invention relates to the technical field of composite fibers, and in particular relates to an orange-slice-like structured composite fiber with controllable bonding strength and a preparation process of the composite fiber. The composite fiber is formed by arranging two or more high polymers with different melting points and different components at intervals in a crossed mode, the cross section of the fiber is in an orange-slice-like shape, the orange-slice-like shape is asymmetric, the melting point difference of the high polymers with different components in the composite fiber is greater than or equal to 30 DEG C, and the ratio of the minimum value to the maximum value of the orange slice area of the lowest-melting-point component in the high polymers is (1:1.05) to (1:6). The preparation process of the composite fiber comprises the following steps: drying the polymers; injecting the high polymer slices into a spinning assembly; pressing out the melt from spinneret orifices, andthus primary filaments with asymmetric orange slice structures are formed; and carrying out drafting and elasticizing to prepare the composite fiber. The asymmetric orange-slice-like structure is utilized, so that the viscosity process of the composite fiber is controllable, by adjusting the cross section area ratio of the low-melting-point components, the bonding strength and the bonding effectof the fiber are controllable within a certain range, and meanwhile, the fabric can be endowed with air permeability and moisture absorption.

Description

technical field [0001] The invention relates to the technical field of composite fibers, in particular to a composite fiber with a pierced-orange structure with controllable bond strength and a preparation process thereof. Background technique [0002] With the improvement of people's daily life, people's requirements for textiles are getting higher and higher. People not only pay attention to the beauty and practicality of textiles, health and environmental protection, but also require textiles to be functional. For example, in hot summer, people hope that their The clothes they wear have antibacterial and breathable effects; for the health care population, people hope that the clothes they wear have health care functions. As a result, composite fibers that combine functionality, aesthetics and practicability came into being. [0003] Composite fiber is a kind of multi-component fiber. There are two or more polymer fibers in the same fiber section. It is a physically modif...

AI Technical Summary

Problems solved by technology

The existing low-melting point bonding fibers with skin-core characteristics have high requirements for bonding temperature and bonding time during hot-melt bonding, and it is difficult to accurately determine the strength. If the temperature is slightly lower and the bonding time is slightly shorter, the low The melting degree of the melting point component is small, and the bonding strength is very low; if the temperature is slightly higher and the bonding time is slightly longer, the low melting point component will completely melt into a molten liquid and separate from the high melting point core layer skeleton

Precise, continuous and controllable bonding effect and bonding firmness cannot be achieved by preparing low-melting point composite fibers with a uniform and symmetrical pie-shaped structure.

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