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Mixed pulp used for producing viscose fiber and its production process

A viscose fiber and mixed pulp technology is applied in the post-processing of cellulose pulp, natural cellulose pulp/paper, pulping with inorganic alkali, etc. The effect of improving quality, producing pollution-free and simple process

Active Publication Date: 2013-03-20
湖南吉湘生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The four major difficulties of pulp have brought a series of technological obstacles such as dyeing difficulties and prolonged production time to chemical fiber manufacturers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of mixed pulp for producing viscose fiber, which is composed of bleached wood pulp: bleached cotton pulp = 70-90: 10-30 (70: 30 in this embodiment) after cooking, bleaching and acid treatment , prepared after papermaking, the degree of polymerization of the mixed pulp is 500DP~600DP, the first fiber is ≥94.5%, the ash content is ≤0.1%, the iron is ≤18ppm, the reactivity is ≤100s, the whiteness is 80%~85%, small Dust≤140㎎ / ㎝ 2 .

[0019] The bleached wood pulp is bleached coniferous wood pulp, its degree of polymerization is 950DP-1050DP, ash fiber ≥ 87.5%, ash content ≤ 0.1%, iron ≤ 20ppm, viscosity 25 mpa.s ~ 30 mpa.s, whiteness 88% ~90﹪, small dust≤100㎎ / ㎝ 2 . In this example, the degree of polymerization is 950DP, methyl fiber = 88.5%, ash = 0.1%, iron = 20ppm, viscosity 25 mpa.s, whiteness 88%, small dust = 100㎎ / ㎝ 2 .

[0020] The bleached cotton pulp is a bleached cotton pulp prepared from cotton linters, and its linter linter maturity is ≥ 30%, sulfuric ...

Embodiment 2

[0034] In step (1), bleached wood pulp: bleached cotton pulp = 90:10, the degree of polymerization of the prepared mixed pulp is 520DP, methyl fiber = 94.5%, ash = 0.1%, iron = 15ppm, reactivity = 80s, white Degree 82﹪, small dust = 120㎎ / ㎝ 2 . The rest are the same as embodiment 1.

Embodiment 3

[0036] Bleached wood pulp: bleached cotton pulp = 80:20, the prepared mixed pulp has a degree of polymerization of 560DP, a fiber = 94.5%, ash = 0.10%, iron = 18ppm, reactivity = 95 s, whiteness 81%, Small dust=140㎎ / ㎝ 2 . The rest are the same as embodiment 1.

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Abstract

The invention discloses mixed pulp used for producing viscose fiber and its production process, which is characterized in that the mixed pulp is composed of bleached wood pulp and bleached cotton pulp according to weight ratio of 70: 90: 10-30, the process comprises the following steps: preparing materials, boiling, bleaching, performing acid-treatment, papermaking to obtain the mixed pulp. The polymerization degree of the mixed pulp is 500 DP-600 DP, alpha cellulose is greater than or equal to 94.5%, the ash content is less than or equal to 0.1%, iron is less than or equal to 18ppm, the reaction performance is less than or equal to 100s, the whiteness is 80%-85%, small dust is less than or equal to 140mg / cm<2>. The process of the invention is simple, the production has no pollution, so that practical problem of raw material shortage can be solved, the chemical fiber production cost is substantially reduced, and the product quality is enhanced.

Description

technical field [0001] The present invention relates to a raw material pulp for the textile industry, in particular to a mixed pulp for producing viscose fiber and a production process, in particular to a mixed pulp produced by using bleached wood pulp and bleached cotton pulp and Production Process. Background technique [0002] At present, as the raw material pulp of the textile industry, there are generally cotton pulp, bamboo pulp, wood pulp, etc., and its main technical indicators are: first, low methyl fiber (88%~92%); second, high ash content (≥ 0.2%); the third is heavy iron content (≥30ppm); the fourth is that the reaction performance is unstable and takes a long time (more than 200s), and it is difficult to control the cost. The four major difficulties of pulp have brought a series of technological obstacles such as dyeing difficulties and prolonged production time to chemical fiber manufacturers. Contents of the invention [0003] The purpose of the present in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C3/02D21C9/12D21C9/00D21H11/00
Inventor 张振宇孙同会李明红卢永利王彦斌李晓星谢新友
Owner 湖南吉湘生物科技有限公司