Acid bath process for glass paper production

A cellophane and acid bath technology, applied in the field of viscose fiber, can solve the problems of high energy consumption, small processing capacity, small equipment capacity, etc., and achieve the effects of reducing investment, reducing ends, and reducing operation and maintenance personnel.

Active Publication Date: 2016-03-02
CHENGDU GRACE FIBER
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Problems solved by technology

The above patents do not require special evaporation equipment for cellophane acid baths for evaporation and crystallization equipment for

Method used

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  • Acid bath process for glass paper production

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Embodiment 1

[0017] The acid bath produced by cellophane in the prior art consists of: water, sodium sulfate, sulfuric acid. In the production process, the concentration of sodium sulfate is generally controlled at 220-250g / L, and the concentration of sulfuric acid is generally controlled at 145-155g / L. There are special evaporation equipment for evaporation and crystallization equipment for acid bath recovery, but due to the small processing capacity and equipment capacity, the year-on-year energy consumption is relatively high. At the same time, personnel are required to operate independently.

[0018] A kind of acid bath process for the production of cellophane of the present invention, in the production process, the acid bath of cellophane and the acid bath of viscose fiber are integrated, and described integration is the reacid (reacted acid) of cellophane and Evaporate and crystallize in the acid bath of viscose fiber to carry out acid bath recovery; then add the acid bath of quantit...

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Abstract

The invention discloses an acid bath process for glass paper production. The process is as below: integrating a glass paper acid bath and a viscose fiber acid bath by merging recycling acid of glass paper into the acid bath of viscose fiber, evaporating and crystallizing; and then merging the viscose fiber acid bath into the glass paper acid bath to supplement the concentration of the glass paper acid bath. The process reduces independent evaporation of the glass paper and crystallization equipment investment; larger evaporation of viscose fiber and crystallization equipment are utilized to reduce the overall energy consumption; the reduction of composition process concentration (sulfuric acid) reduces the consumption of chemical materials; and the operating and maintenance personnel are reduced.

Description

technical field [0001] The invention relates to the technical field of viscose fiber, in particular to an acid bath process for cellophane production. Background technique [0002] Cellophane is a film made of natural fibers such as cotton pulp and wood pulp by adhesive method. It is transparent, non-toxic and tasteless. Because air, oil, bacteria and water are not permeable to cellophane, it can be used as food packaging. It has good tensile strength, gloss and printability. The production method is different from that of paper, but similar to that of rayon. Using refined chemical wood pulp or cotton linter dissolving pulp with high α-cellulose content as raw materials, alkali cellulose is obtained through alkalization (18% sodium hydroxide), pressing, crushing and other processes, and then added carbon disulfide after aging. It is yellowed into cellulose xanthate and dissolved in sodium hydroxide solution to make orange cellulose viscose. The viscose is matured at a t...

Claims

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Application Information

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IPC IPC(8): D21H27/06
Inventor 赵伦树刘坚赵必波
Owner CHENGDU GRACE FIBER
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