High polymerization degree cotton pulp and method for making the same

A technology of high degree of polymerization and cotton pulp, applied in the field of preparation of high degree of polymerization cotton pulp and high degree of polymerization cotton pulp, can solve the problems of poor reaction performance, high pollution, low content of methyl fiber, etc. Excellent performance, good reaction performance, high content of methyl fiber

Inactive Publication Date: 2008-02-27
CHTC HELON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the rapid development of these cellulose derivatives, the requirements for the raw materials for the preparation of these products are getting higher and higher, such as high-polymerization cotton pulp. Low, poor reactivity, low quality grade, unable to meet the needs of the development of cellulose derivatives
However, the production of cotton pulp still adopts the traditional high-temperature high-alkali cooking and sodium hyp

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Select high-quality cotton linters with a maturity of ≥70%, no impurities in appearance, and no foreign fibers to prepare and screen to obtain cotton linters that meet the production conditions. The cotton linter content is 6.5%, the additives are sodium dodecylbenzenesulfonate relative to the dry cotton linter content 1.2%, hydrogen peroxide relative to the dry cotton linter content 1.2%, magnesium sulfate relative to the dry cotton linter content 0.2% %, sodium silicate is 1.5% relative to the dry cotton linters, and the liquid ratio is 1:3. The pulp is rinsed; then the cooked pulp is beaten in a beater, and then the obtained pulp is desanded in a desander to remove impurities and fine fibers in the pulp; the pulp is For chlorination bleaching, the effective amount of chlorine is 1% relative to the absolute dry pulp, the concentration of the pulp can be about 5%, and the chlorination is carried out for 30 minutes at a temperature of 28°C and a pH value of 9; The liqu...

Embodiment 2

[0021] The process steps adopted in this embodiment are consistent with Example 1, except that when cooking in the process, the relative absolute dry cotton linters are 8% in terms of NaOH, and the auxiliary agent is Pingping plus relative absolute dry cotton linters 0.8 %, hydrogen peroxide is 1% relative to the dry cotton linters, magnesium sulfate is 0.2% relative to the dry cotton linters, sodium silicate is 1.4% relative to the dry cotton linters, and the liquid ratio is 1:2, within 60 minutes Heat up to 135°C and keep warm for 90 minutes;

[0022] For bleaching, the effective amount of chlorine used is 1.5% relative to the absolute dry pulp, and the concentration of the pulp can be about 2%. Chlorination is carried out for 35 minutes at a temperature of 40°C and a pH value of 10;

[0023] The pulp performance that adopts above-mentioned embodiment to obtain is:

[0024] Polymerization degree ≥ 2418,

[0025] A cellulose 99.0%,

[0026] Ash 0.10%,

[0027] Iron conten...

Embodiment 3

[0032] The process steps adopted in this embodiment are consistent with Example 1, except that when cooking in the process, the relative absolute dry cotton linters in terms of NaOH is 10%, and the auxiliary agent adopts Pingping plus relative absolute dry cotton linters 7 %, hydrogen peroxide is 6% relative to the absolute dry cotton linters, magnesium sulfate is 1.2% relative to the absolute dry cotton linters, sodium silicate is 7% relative to the absolute dry cotton linters, and the liquid ratio is 1:3, within 50 minutes Raise the temperature to 125°C and keep it warm for 180 minutes;

[0033] For bleaching, the effective amount of chlorine is 1% relative to the absolute dry pulp, and the concentration of the pulp can be about 3%, and the chlorination is carried out for 20 minutes at a temperature of 32°C and a pH value of 9;

[0034] The pulp performance that adopts above-mentioned embodiment to obtain is:

[0035] degree of polymerization 2468,

[0036] A cellulose 99....

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Abstract

The present invention discloses a cotton pulp with high degree of polymerization and method for preparing said cotton pulp with high degree of polymerization by using cotton linters as raw material. Said preparation method includes the following steps: preparing raw material, digesting, washing material, pulping, removing sand, bleaching, acid treatment, water-washing, filtering and pulp-making, etc.

Description

technical field [0001] The invention relates to the technical field of textiles, in particular to a cotton pulp with a high degree of polymerization prepared by using cotton linters as a raw material and a preparation method for the cotton pulp with a high degree of polymerization. Background technique [0002] Cellulose derivatives are the earliest natural polymer materials discovered by humans. Because cellulose comes from nature, it has incomparable characteristics with other materials, such as good processability, excellent oil resistance, transparency, bright color, fullness, etc., such as High wet modulus viscose fiber (HWM, also known as Modal fiber) and carboxymethyl cellulose ether (CMC), among which high wet modulus viscose fiber overcomes the wet strength and low wet modulus of ordinary viscose fiber, and the fabric size Poor stability, serious disadvantages of easy deformation during wet finishing and laundering, its characteristics are very similar to high-quali...

Claims

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Application Information

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IPC IPC(8): D01C1/00
Inventor 刘建华李琳王东
Owner CHTC HELON
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