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Mixed pulp used for producing viscose fiber and its production process

A technology of viscose fiber and mixed pulp, which is applied in the post-treatment of cellulose pulp, natural cellulose pulp/paper, pulping with inorganic alkali, etc. It can solve the problems of chemical fiber manufacturers such as difficulty in dyeing and prolonged production time, and achieve The effect of producing no pollution, improving quality and reducing production cost

Active Publication Date: 2012-02-01
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 mixed pulp used for the production of viscose fiber, by weight, it is made 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, A fiber ≥94.5%, ash content≤0.1%, iron≤18ppm, reaction performance≤100s, whiteness 80%~85%, small Dust≤140㎎ / ㎝ 2 .

[0019] The bleached wood pulp is bleached softwood pulp with a degree of polymerization of 950DP~1050DP, a 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, the first fiber=88.5﹪, the ash content=0.1﹪, the iron=20ppm, the viscosity is 25 mpa.s, the whiteness is 88﹪, and the dust=100㎎ / ㎝ 2 .

[0020] The bleached cotton pulp is a bleached cotton pulp prepared from cotton linters, the maturity of the cotton linters is ≥30%, the sulfuric acid insolu...

Embodiment 2

[0034] In step ⑴, bleached wood pulp: bleached cotton pulp = 90: 10, the degree of polymerization of the prepared mixed pulp is 520DP, nail fiber = 94.5%, ash content = 0.1%, iron = 15ppm, reaction performance = 80s, white Degree 82%, small dust=120㎎ / ㎝ 2 . The same as in Example 1.

Embodiment 3

[0036] Bleached wood pulp: bleached cotton pulp=80:20, the degree of polymerization of the prepared mixed pulp is 560DP, methyl fiber=94.5﹪, ash content=0.10﹪, iron=18ppm, reaction performance=95 s, whiteness 81﹪, Small dust=140㎎ / ㎝ 2 . The same as in Example 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 invention relates to a raw material pulp for the textile industry, specifically a mixed pulp used for the production of viscose fibers 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. The main technical indicators include one is low fiber (88%~92%); the other is high ash content (≥ 0.2%); The third is the iron content (≥30ppm); the fourth is the unstable reaction performance and long time (over 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 for chemical fiber manufacturers. Summary of the invention [0003] The purpose of the present invention is to provide a mixed pul...

Claims

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Application Information

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Patent Type & Authority Applications(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