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Method for preparing cellulose film by recycling waste adhesive film

A technology of cellulose film and viscose film, which is applied in the field of recycling and reusing waste viscose film to prepare cellulose film, can solve the problems of not conforming to the production concept of high efficiency, energy saving and environmental protection, complex process, etc., and achieve high safety, The process is simple and the effect of saving production cost

Inactive Publication Date: 2020-09-25
HUBEI GOLDEN RING NEW MATERIALS TECH LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has complex processes, the use of toxic chemical reagents CS 2 And other issues, also do not meet the production concept of modern enterprises with high efficiency, energy saving and environmental protection

Method used

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  • Method for preparing cellulose film by recycling waste adhesive film
  • Method for preparing cellulose film by recycling waste adhesive film
  • Method for preparing cellulose film by recycling waste adhesive film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047]S1, prepare a sodium hydroxide solution with a mass fraction of 9 wt% at room temperature as a solvent; cut the waste adhesive film and dry it in an oven at 60°C for 5 hours; then pass the dried waste adhesive film fragments through a mixer Open for 1 min; disperse and soak the pretreated waste adhesive film into the solvent, and let it stand at 4°C for 12 hours to obtain a blend. In the blend, the mass of the waste adhesive film The fraction is 4wt%;

[0048] S2, putting the blend prepared in step S1 into a wall breaking machine with high-speed shearing and vigorous stirring for 2 minutes, and defoaming to obtain a cellulose solution; wherein, the power of the wall breaking machine is 600W;

[0049] S3, scraping the cellulose solution prepared in step S2 on a glass plate by casting, and then immersing the cellulose solution film obtained by spreading the film together with the glass plate into a coagulation bath of hydrochloric acid solution with a mass fraction of 15 w...

Embodiment 2

[0057] The difference from Example 1 is that the types of coagulation baths used are different. In Example 2, a sulfuric acid solution with a mass fraction of 15wt% is used as the coagulation bath. Others are the same as in Example 1, and will not be repeated here.

Embodiment 3

[0059] The difference from Example 1 is that the types of coagulation baths used are different. In Example 3, saturated oxalic acid solution at room temperature is used as the coagulation bath. Others are the same as in Example 1, and will not be repeated here.

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Abstract

The invention provides a method for preparing the cellulose film by recycling a waste adhesive film, which is simple in process and environment-friendly. The method comprises the following steps: firstly, soaking a pretreated waste adhesive film in a sodium hydroxide aqueous solution at 4 DEG C for 1-24 hours to obtain a blend; then, carrying out high-speed shearing and violent stirring on the blend, crushing, dissolving and defoaming to prepare a cellulose solution with the mass fraction of 2-6wt%; finally, through a sol-gel conversion method, performing steps of film laying, regeneration, cleaning, drying and the like on the cellulose solution, and preparing the regenerated cellulose film. The film preparation method is simple in process, low in cost, environment-friendly and pollution-free, and is a green production process for recycling the waste adhesive film.

Description

technical field [0001] The invention relates to the field of recovery and reuse of industrial wastes, in particular to a method for preparing cellulose films by recycling waste adhesive films. Background technique [0002] As a packaging material, regenerated cellulose film is not only flexible, but also transparent like glass, so it is called "cellophane". No pollution, excellent environmental protection performance; 2) Excellent tensile strength and stretchability, no static electricity, excellent composite performance; 3) High temperature resistance, no deformation at 190°C; 4) After coating, it can be It has the characteristics of moisture-proof, oil-proof, water-tight, air-tight, heat-sealable, etc., and has strong barrier properties; 5) Non-toxic, tasteless, and high transparency. [0003] In recent years, with the introduction of the concept of sustainable development, the recycling and reuse of leftover waste in industrial production has attracted people's attention...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08J11/08C08L1/02
CPCC08J5/18C08J11/08C08J2301/02Y02W30/62
Inventor 朱坤坤余达山盛永新王友春徐卫林
Owner HUBEI GOLDEN RING NEW MATERIALS TECH LTD
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