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Colorful polylactic acid and glycolide-trimethylene carbonate copolymer composite fiber and preparation method thereof

A methyl carbonate, polylactic acid fiber technology, applied in fiber processing, fiber chemical characteristics, conjugated synthetic polymer rayon, etc., can solve the problem of increasing patient treatment costs, affecting the flexibility of surgical wires, and limiting wide application, etc. problems, to achieve good biodegradation rate, economical applicability, and good operability

Pending Publication Date: 2019-12-20
CHINESE TEXTILE ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The production process of polylactic acid is non-polluting, and the product can be biodegraded to realize the cycle in nature. Therefore, it is an ideal green polymer material with low cost. It has achieved large-scale production and is widely used in biodegradable fibers, films, and plastics. The preparation of products, especially its fibers have good biocompatibility, and have no resistance to the human body and good degradability, and its degradation product is CO 2 and H 2 O, has been widely used in daily operations as surgical sutures, but its short degradation cycle limits its further wide application
Currently commonly used glycolide-trimethylene carbonate copolymer surgical sutures on the market, although the degradation time is long, but the price of the fiber is relatively expensive, which greatly increases the treatment cost of patients
Although polylactide and its composite spinning fiber can reduce its cost, the cost of polylactide is still high due to its high price
[0003] In actual operation, in order to make the fiber surface smooth and easy to suture, and avoid damage to the wound, a layer of calcium stearate is usually coated on the surface, but it is easy to affect the flexibility of the surgical thread

Method used

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  • Colorful polylactic acid and glycolide-trimethylene carbonate copolymer composite fiber and preparation method thereof
  • Colorful polylactic acid and glycolide-trimethylene carbonate copolymer composite fiber and preparation method thereof

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preparation example Construction

[0055] The preparation method of the purple smooth polylactic acid and glycolide-trimethylene carbonate copolymer composite fiber provided by the embodiment of the present invention comprises the following steps:

[0056] Step S1: Obtain polylactic acid slices and glycolide-trimethylene carbonate copolymer slices respectively; grind the glycolide-trimethylene carbonate copolymer slices into 150-mesh powder under liquid nitrogen cooling conditions, and then Mix evenly with 0.4% Violet No. 2 and 1.2% (polycaprolactone weight phenol) calcium stearate, stand-by as composite fiber cortex composition;

[0057] Step S2: Carry out composite spinning for the polylactic acid chip and glycolide-trimethylene carbonate copolymer powder mixture, so that polylactic acid is in the core layer of the composite fiber, and the purple smooth glycolide-trimethylene carbonate copolymer is The polylactic acid is wrapped with polylactic acid to form the skin layer of the composite fiber, and the purpl...

Embodiment 1

[0088] The ratio of the cross-sectional area of ​​the skin layer to the core layer (with polylactic acid as the core of the composite fiber and the mixture of glycolide-trimethylene carbonate copolymer powder as the skin of the composite fiber) is 20:80,

[0089] The spare polylactic acid / glycolide-trimethylene carbonate copolymer powder mixture is vacuum-dried separately, the drying temperature is 85°C, and the vacuum degree is -0.1MPa. The composite fiber is spun-stretched in one step method, the stretching ratio is 5 times. The monofilament fineness is 2.2dtex (50D / 24f). The spinning process conditions are: the temperature range of the core layer component is 210-220°C, the screw pressure is 10MPa, the spinning speed is 300m / min, the temperature range of the skin layer component is 150-180°C, the screw pressure is 8.0MPa, the spinning The speed is 240m / min, the air is cooled, and the side blowing speed is 5m / min, and the purple smooth polylactic acid / glycolide-trimethylene...

Embodiment 2～20

[0092]

[0093]

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Abstract

The invention discloses a colorful polylactic acid and glycolide-trimethylene carbonate copolymer composite fiber and a preparation method thereof. The composite fiber comprises a glycolide-trimethylene carbonate copolymer powder mixture and a polylactic acid composite fiber, after the composite fiber is formed, the polylactic acid fiber forms a core layer of the composite fiber, and the colorfulglycolide-trimethylene carbonate copolymer forms a skin layer of the composite fiber. The preparation method comprises the steps that the glycolide-trimethylene carbonate copolymer powder mixture andpolylactic acid slices are obtained respectively; the raw materials are subjected to composite spinning, the polylactic acid is located in the core layer of the composite fiber, the polylactic acid iscoated with the colorful glycolide-trimethylene carbonate copolymer to form the skin layer of the composite fiber, and the colorful composite fiber is obtained. The colorful composite fiber preparedby using the method can meet the requirements for a surgical suture, the colorful composite fiber is softer, and the cost is lower.

Description

technical field [0001] The invention relates to the technical field of compound preparation, in particular to a composite fiber of colored polylactic acid and glycolide-trimethylene carbonate copolymer and a preparation method thereof. Background technique [0002] The production process of polylactic acid is non-polluting, and the product can be biodegraded to realize the cycle in nature. Therefore, it is an ideal green polymer material with low cost. It has achieved large-scale production and is widely used in biodegradable fibers, films, and plastics. The preparation of products, especially its fibers have good biocompatibility, and have no resistance to the human body and good degradability, and its degradation product is CO 2 and H 2 O, has been widely used in daily operations as surgical sutures, but its short degradation cycle limits its wide application in the near future. Currently commonly used glycolide-trimethylene carbonate copolymer surgical sutures on the ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/14D01F1/10D01D5/34
CPCD01D5/34D01F1/10D01F8/14
Inventor 刘伯林黄庆金剑
Owner CHINESE TEXTILE ACAD
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