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A kind of manufacture method of biodegradable starch-based fiber

A technology of biodegradation and manufacturing method, applied in the direction of fiber chemical characteristics, conjugated synthetic polymer artificial filament, melt spinning method, etc., can solve the problems of inferior cellulose, poor thermoplasticity, difficulty in forming and processing granular starch, etc. Achieve the effect of cost reduction and simple process

Inactive Publication Date: 2011-12-14
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And because starch has strong hydrophilicity and poor thermoplasticity, its granular structure also brings difficulties to starch forming and processing, resulting in its application on fibers is far inferior to that of cellulose.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The biodegradable resin (provided by Bioge Environmental Protection Materials Co., Ltd., the same below) with a weight composition of corn starch: polycaprolactone: polylactic acid: glycerin: vegetable oil = 50: 16: 11: 12: 1 was placed at 70 ° C In a vacuum oven, dry for 20 hours before use; feed the obtained dry resin into a twin-screw spinning machine for melt spinning, wherein the twin-screws in the first, second, third, fourth, fifth, sixth and seventh districts are The spinning temperature is 165°C, 170°C, 170°C, 175°C, 175°C, 180°C, 180°C, the melt temperature is 175°C, the spinneret temperature is 150°C, the host frequency is 5.2Hz, and the feeding frequency is 4.4 Hz, a melt pump frequency of 10.1 Hz, and a winding speed of 60 r / min to obtain as-spun fibers. The as-spun fibers were stretched 3 times at a temperature of 75° C., then dried and wound to obtain the fibers.

[0023] After testing (conventional method, the same below), the breaking strength of the ob...

Embodiment 2

[0025] The biodegradable resin whose weight composition is corn starch: polycaprolactone: polylactic acid: sorbitol: mineral oil = 50: 16: 11: 12: 1 was dried in a vacuum oven at 60°C for 24 hours before use;

[0026] Feed the obtained dry resin into a twin-screw spinning machine for melt spinning, wherein the spinning temperatures of the twin-screw first zone, second zone, third zone, fourth zone, fifth zone, sixth zone, and seventh zone are 155°C, 160°C, respectively. ℃, 160°C, 165°C, 165°C, 170°C, 170°C, the melt temperature is 165°C, the spinneret temperature is 145°C, the host frequency is 4.8Hz, the feeding frequency is 4.2Hz, the melt pump frequency is 9.8Hz, The winding speed was 55r / min to prepare as-spun fibers, which were stretched twice at a temperature of 70°C, then dried and wound to obtain the fibers.

[0027] After testing, the breaking strength of the fiber is 2.89-4.13cN / dtex, and it can degrade 78.57% after 210 days in the soil at room temperature, relative ...

Embodiment 3

[0029] Put the resin whose weight composition is corn starch: polycaprolactone: polylactic acid: diethylene glycol: aluminate coupling agent = 50: 16: 11: 12: 1 in a vacuum oven at 80°C, and dry for 18 hours for backup use;

[0030] Feed the obtained dry resin into a twin-screw spinning machine for melt spinning, wherein the spinning temperatures of the twin-screw zones 1, 2, 3, 4, 5, 6 and 7 are 175°C and 180°C respectively. ℃, 180℃, 185℃, 185℃, 190℃, 190℃, melt temperature is 180℃, spinneret temperature is 152℃, host frequency is 5.4Hz, feeding frequency is 4.6Hz, melt pump frequency is 10.4Hz, The winding speed is 65r / min, and the as-spun fiber is obtained, and the as-spun fiber is stretched 4 times at a temperature of 80° C., and then dried and wound to obtain the described fiber.

[0031] After testing, the breaking strength of the fiber is 0.65-1.15cN / dtex, and it can degrade 65.39% after 150 days in the soil at room temperature, relative humidity of 75%, and pH value o...

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Abstract

The invention discloses a method for manufacturing biodegradable starch-based fibers. The process is as follows: 1. Put the biodegradable resin in a vacuum oven at 60-80°C and dry it for 16-24 hours before use; the biodegradable resin refers to A blend of the following substances and weight ratios: cornstarch: polycaprolactone: polylactic acid: plasticizer: compatibilizer = 50: 16: 11: 12: 1; the plasticizer is glycerin, diglycol At least one of alcohol, sorbitol, ethylene glycol or propylene glycol; the compatibilizer is at least one of vegetable oil, mineral oil, titanate coupling agent or aluminate coupling agent; 2. dry The resin is melt-spun with a twin-screw spinning machine, the spinning temperature is 155-190°C, the temperature of the spinneret is 10-30°C lower than the average temperature of the screw heating area, and the primary fiber is obtained, and then stretched at a temperature of 70-80°C 2 to 4 times, and then dried and wound to obtain biodegradable starch-based fibers.

Description

technical field [0001] The invention relates to fiber preparation technology, in particular to a method for manufacturing biodegradable starch-based fibers. Background technique [0002] At present, due to the extensive use of refractory polymer materials, the pollution of waste to the environment is intensified. In particular, some packaging materials are discarded in the natural environment after use, causing white pollution. However, it is unrealistic to control its use, because it has excellent performance and is even indispensable in many application fields. Therefore, the research on environmentally friendly materials has attracted people's attention and promoted the research and development of degradable polymer materials. . Starch-based biodegradable plastic is a kind of plastic product processed by starch modification and grafting reaction. It has the advantages of fast biodegradation and no pollution to the environment. In 1973, British GJ. LGifinlle first repor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/18D01F8/14D01D1/04D01D5/08
Inventor 肖长发马艳霞徐乃库
Owner TIANJIN POLYTECHNIC UNIV
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