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Method for preparing biodegradable copolyester fully-drawn yarns in one step

A technology of full-drawn yarn and copolyester, which is applied in the direction of single-component copolyester artificial filament, filament generation, melt spinning, etc., to achieve good evenness, good spinning stability, and increased strength Effect

Inactive Publication Date: 2010-07-21
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to provide a kind of one-step preparation method of biodegradable copolyester fully drawn silk, to solve existing two-step method spinning polybutylene terephthalate-co-butylene succinate There are two problems in the above-mentioned process that ester fully drawn yarn exists

Method used

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  • Method for preparing biodegradable copolyester fully-drawn yarns in one step
  • Method for preparing biodegradable copolyester fully-drawn yarns in one step
  • Method for preparing biodegradable copolyester fully-drawn yarns in one step

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Chips of polybutylene terephthalate-co-butylene succinate (PBST) with an intrinsic viscosity of 0.85dL / g and a weight average molecular weight of 92,000 were dried in a vacuum oven at 110°C for 24 hours and then fed The hopper 1 of the one-step melt spinning machine is then extruded and heated through the five zones of the screw extrusion device 2. The temperature in zone I is 185°C, the temperature in zone II is 190°C, the temperature in zone III is 200°C, and the temperature in zone IV is 220°C, the temperature in the V zone is 240°C, and then enters the box 3, the temperature of the box 3 is 250°C, then the melt passes through the metering pump 4 and is ejected from the spinneret 5, the flow rate of the metering pump 4 is 30g / min, The aperture of the spinneret 5 is 0.32mm, the aspect ratio is 4.0, and the number of holes is 36 holes; the polybutylene terephthalate-co-butylene succinate melt ejected from the spinneret 5 Thin stream is drawn and formed through two pair...

Embodiment 2

[0027] Polybutylene terephthalate-co-butylene succinate chips with an intrinsic viscosity of 1.05dL / g and a weight average molecular weight of 124,000 were dried in a vacuum oven at 110°C for 24 hours and then fed into one-step melting The hopper 1 of the spinning machine is then extruded and heated through the five zones of the screw extrusion device 2. The temperature in zone I is 190°C, the temperature in zone II is 200°C, the temperature in zone III is 215°C, and the temperature in zone IV is 230°C. The temperature in the V zone is 245°C, and then enters the box body 3, the temperature of the box body 3 is 255°C, then the melt passes through the metering pump 4 and is ejected from the spinneret 5, the flow rate of the metering pump 4 is 38g / min, and the spinneret The aperture of 5 is 0.32mm, aspect ratio is 4.0, and number of holes is 36 holes; The polybutylene terephthalate-co-butylene succinate melt stream that sprays out from spinneret 5, Carry out draft forming through...

Embodiment 3

[0030]Polybutylene terephthalate-co-butylene succinate chips with an intrinsic viscosity of 1.15dL / g and a weight average molecular weight of 140,000 were dried in a vacuum oven at 110°C for 24 hours and then fed into one-step melting The hopper 1 of the spinning machine is then extruded and heated through the five zones of the screw extrusion device 2. The temperature in zone I is 200°C, the temperature in zone II is 210°C, the temperature in zone III is 220°C, and the temperature in zone IV is 235°C. The temperature in the V zone is 255°C, and then enters the box 3, the temperature of the box 3 is 265°C, then the melt passes through the metering pump 4 and is ejected from the spinneret 5, the flow rate of the metering pump 4 is 30g / min, and the spinneret The aperture of 5 is 0.32mm, aspect ratio is 4.0, and number of holes is 36 holes; The polybutylene terephthalate-co-butylene succinate melt stream that sprays out from spinneret 5, Carry out draft forming through two pairs ...

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Abstract

The invention belongs to the technical field of the melt-spinning manufacturing functional synthetic fibers, and provides a method for preparing biodegradable copolyester fully-drawn yarns in one step, which is specifically used for preparing the biodegradable polybutylene terephthalate-co-polybutylene succinate fully-drawn yarns by taking biodegradable polybutylene terephthalate-co-polybutylene succinate slices as raw materials and adopting a one-step melt-spinning process. The method has the advantages of high spinning stability, no broken filament, high yarn levelness, good winding property and high spinning speed; and by the method, the strength of the fully-drawn yarn is enhanced and production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of producing functional synthetic fibers by melt spinning. The invention provides a one-step method for preparing biodegradable copolyester full-drawn yarn. Background technique [0002] In recent years, synthetic fibers have been widely used in the textile field. According to statistics, the use of synthetic fibers accounted for about 65% of the total amount of textile fibers in 2008. The extensive use of synthetic fibers also brings certain problems. Non-degradable fiber waste In this context, polybutylene succinate-co-terephthalate (PBST), a biodegradable aliphatic / aromatic copolyester, Because of its good biodegradability and good mechanical processing performance, it has become a hot spot in the research of synthetic fibers in the world. [0003] The preparation of drawn filaments by melt spinning is one of important processing methods in the textile industry. Chinese patent authorization publication ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/098D01D5/088D01D11/00D01F6/84
Inventor 俞建勇罗胜利李发学秦超王学利戴建平杨晓春
Owner DONGHUA UNIV
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