Composite polyester fibers, methods of making and using the same

By controlling the characteristic parameters of the core and sheath materials and designing the spinneret, composite polyester fibers with good uniformity were prepared, solving the problem of poor uniformity in the thickness of the composite fibers and improving the effect of the fibers in cell culture.

CN119491306BActive Publication Date: 2026-06-12CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEMICAL CORP
Filing Date
2023-08-18
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

In existing technologies, the uniformity of composite fibers is difficult to control, especially the poor uniformity of thickness of ultrafine composite fibers, which affects their application in high-requirement products.

Method used

Composite polyester fibers with a core-sheath structure were prepared by controlling the difference in melting point, intrinsic viscosity, and standard deviation between the core and sheath materials, and by using a high-precision spinneret. The spinneret holes were designed to be concentric circles, the difference in spinneret hole diameter was controlled within 2 μm, and the mass ratio of the core material to the sheath material was between 1.5 and 4.

Benefits of technology

This resulted in good diameter uniformity of the composite polyester fibers, improved the cells' sugar metabolism capacity, and enhanced the mechanical properties of the fibers.

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Abstract

The application relates to the technical field of composite polyester fibers, and discloses a composite polyester fiber and a preparation method and application thereof, which comprises the following steps: obtaining melt by respectively melting core layer material and skin layer material, and then spinning the melt to obtain a composite polyester fiber with a skin-core structure; wherein the melting point of the core layer material is higher than that of the skin layer material by more than 22 DEG C; the intrinsic viscosity of the skin layer material is higher than that of the core layer material by 0.01-0.15 dL / g, and the standard deviation of the intrinsic viscosities of the core layer material and the skin layer material is less than or equal to 0.02 dL / g; the mass ratio of the core layer material to the skin layer material is x, and 1.5<=x<=4; wherein the shape of the spinning hole of the spinneret used in the spinning process is a concentric circle shape, the difference between the maximum diameter and the minimum diameter of each circle of the spinning hole is less than or equal to 2 micrometers, and the difference between the maximum diameter and the minimum diameter of each outer circle is less than or equal to 2 micrometers. The superfine polyester fiber disclosed by the application has high uniformity.
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Citation Information

Patent Citations

  • A method for preparing highly uniform military-grade soft polyester industrial yarn

    CN107893264B

  • Production apparatus and preparation method for high-uniformity superfine polyester fibers

    WO2022134653A1

  • Filaments for beverage extraction filter and woven fabric comprising same for beverage extraction filter

    CN110446668A

  • KR20190006367A