Manufacturing method for bamboo cellulose fibre by solvent method

A technology of cellulose fibers and manufacturing methods, applied to artificial filaments made of viscose, wet spinning, etc., can solve problems such as broken ends, inability to spin, solubility, defoaming and spinnability decline, etc. , to achieve the effect of low cost, short production process and good spinnability

Inactive Publication Date: 2005-02-23
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This patent mainly introduces the preparation of bamboo pulp, but does not explain the conditions and control of the key points of Lyocell bamboo fiber preparation, and thinks that the obtained bamboo cellulose molecular polymerization degree must be ≥ 800. However, practice has proved that , when the molecular polymerization degree of bamboo cellulose reaches more than 1000, its solubility in NMMO, defoaming property and spinnability drop sharply, and even it cannot be spun, resulting in a large number of broken ends. Therefore, bamboo cellulose pulp is selected according to this patent The degree of polymerization of meal molecules can only be 800-1000, that is, the degree of polymerization of selected raw materials is limited to a narrow range

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: after the bamboo pulp that DP is 500 is cut into the small piece of 4cm * 4cm with common pulp cutter, under decompression state (decompression to-7 * 10 4 Pa) and 50 DEG C under equilibrium for 8 hours, the moisture content of the obtained pulp flakes reaches 4%;

[0020] 198.3kg of NMMO aqueous solution (the weight ratio of NMMO and water is 1) was evaporated to 134kg under reduced pressure, so that its water content was 26% (that is, the concentration of NMMO was 74%);

[0021] 10.25 kg of the above-mentioned pulp chips and 134 kg of 74% NMMO aqueous solution were mixed in a 300-liter polymerization kettle, and the temperature of the kettle was 80° C. To prevent oxidation, 124 g of propyl citrate was added simultaneously. After dipping and swelling for 20 minutes, turn on the agitator and control its speed to 110r / min, and at the same time turn on the vacuum system to maintain the vacuum degree at -9×10 4 Pa, and gradually increase the temperature to ...

Embodiment 2

[0023]Embodiment 2: after the bamboo pulp that DP is 500 is cut into the small piece of 4cm * 4cm with common pulp cutter, under decompression state (decompression to-7 * 10 4 Pa) and 50 DEG C under equilibrium for 8 hours, the moisture content of the obtained pulp flakes reaches 4%;

[0024] 2800g of NMMO aqueous solution (the weight ratio of NMMO and water is 1) was evaporated to 1892g under reduced pressure, so that its water content was 26% (that is, the concentration of NMMO was 74%);

[0025] 160.8g of the above-mentioned pulp flakes and 1892g of 74% NMMO aqueous solution were placed in a 5 liter dissolving kettle and mixed, and the temperature of the kettle was 80°C. To prevent oxidation, 1.6 g of propyl citrate was added at the same time. After dipping and swelling for 20 minutes, turn on the agitator and control its speed to 100r / min, and at the same time turn on the vacuum system to maintain the vacuum degree at -9.6×10 4 Pa, and gradually increase the temperature ...

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Abstract

A process for preparing bamboo cellulose fibres by solvent method includes such steps as preparing the spinning solution from bumboo pulp in aqueous solution of NMMO, spraying at 80-110 deg.C, passing through a gap with 70-150 mm in length, shaping in coagulating bath of NMMO, and water washing at 40-60 deg.c. The resultant bamboo fibres features natural antibacterial function, very comfortable, and high drapability.

Description

technical field [0001] The invention relates to a method for manufacturing cellulose fiber by solvent method in the chemical fiber manufacturing industry, in particular to a technology for producing cellulose fiber by using bamboo. Background technique [0002] As early as the 1930s, a patent (US92,179,181) proposed that tertiary amine acid oxides could be used to directly dissolve cellulose to produce a new type of cellulose fiber—Lyocell fiber, which has better performance than viscose. Its composition is still a cellulose structure. The waste is naturally degraded, and it is considered to be a kind of green environmental protection fiber with good comprehensive performance. It has the comfort of cotton fiber, the strength of polyester fiber, the drape of viscose fiber and the softness of silk, and is deeply loved by people. For this reason, from the 1970s to the present, with the joint efforts of scientists at home and abroad, hundreds of patents on Lyocell fibers have b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/06D01F2/08
Inventor 邵惠丽胡学超章潭莉
Owner DONGHUA UNIV
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