Piece-orange-like structure composite fiber with controllable bond strength and its preparation process

Abstract

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. The composite fiber is composed of two or more polymers of different components with different melting points, which are arranged at cross intervals to form a fiber with a cross-section similar to the orange segment. The segment-like shape is asymmetrical. The high polymer of different components in the composite fiber The melting point difference of the polymer is ≥30°C, and the ratio of the minimum value to the maximum value of the orange segment area of ​​the lowest melting point component in the polymer is 1:1.05‑1:6. The preparation process of the composite fiber: drying the polymer; injecting the polymer slice into the spinning assembly; pressing the melt out from the spinneret hole, and solidifying it into a spun silk with an asymmetric orange segment structure; into composite fibers. The present invention utilizes an asymmetrical segment-like structure to make the "viscosity range" of the composite fiber controllable, and by adjusting the cross-sectional area ratio of the low-melting point component, the bonding strength and bonding effect of the fiber can be controlled within a certain range. control, and at the same time, it can also give the fabric 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.

Images