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Recovery and reusing method of waste adhesive films

A viscose film and wet spinning technology is applied in the field of recycling and reuse of waste viscose film, which can solve the problems of waste of resources, thickening, waste of available resources, etc.

Pending Publication Date: 2020-10-23
HUBEI GOLDEN RING NEW MATERIALS TECH LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The drying process of the cellulose film after high-strength drafting can easily cause the curling and thickening of the two edges of the film. In order to ensure the quality of the product, the films on the two edges are usually cut off and discarded. The capital investment of the rubber factory will also cause a waste of available resources
[0003] The waste adhesive film cannot be dissolved by the viscose method, resulting in a waste of this part of resources and an increase in the production cost of the viscose factory caused by waste disposal

Method used

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  • Recovery and reusing method of waste adhesive films
  • Recovery and reusing method of waste adhesive films
  • Recovery and reusing method of waste adhesive films

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of recycling method of waste viscose film, comprises the steps:

[0031] S1, cutting off the waste adhesive film;

[0032] S2. Immerse 2 g of the cut waste adhesive film obtained in step S1 into 98 g of NaOH solution with a solution temperature of 4° C. and a mass percent concentration of 9 wt % for 5 hours;

[0033] S3. Stir the alkali leached waste adhesive film obtained in step S2 through a soybean milk machine for 2 minutes.

[0034] Observing the cellulose solution prepared in this example, it was found that after centrifugation at 5000 rpm for 5 minutes, there were insoluble solids at the bottom of the centrifuge tube, indicating that the cellulose was not completely dissolved.

Embodiment 2

[0036] A kind of recycling method of waste viscose film, comprises the steps:

[0037] S1, cutting off the waste adhesive film;

[0038] S2. Place the cut off waste adhesive film obtained in step S1 in an oven at 60° C. for 5 hours;

[0039] S3, loosening the dried waste adhesive film obtained in step S2 by a mixer for 1 min;

[0040] S4, immersing 2 g of the loosened waste adhesive film obtained in step S3 into 98 g of NaOH solution with a solution temperature of 4° C. and a mass percent concentration of 9 wt % for 5 hours;

[0041] S5, stirring the waste adhesive film obtained in step S4 through a soybean milk machine for 2 minutes;

[0042] Observing the cellulose solution prepared in this example, it was found that after centrifugation at 5000 rpm for 5 minutes, there was no insoluble solid matter at the bottom of the centrifuge tube, and no waste mucofilm fragments were observed under the microscope, indicating that the waste mucofilm had completely dissolved.

Embodiment 3

[0044] A kind of recycling method of waste viscose film, comprises the steps:

[0045] S1, cutting off the waste adhesive film;

[0046] S2. Place the cut off waste adhesive film obtained in step S1 in an oven at 40°C for 24 hours;

[0047] S3, loosening the dried waste adhesive film obtained in step S2 by a mixer for 1 min;

[0048] S4, immersing 2 g of the loosened waste adhesive film obtained in step S3 into 98 g of NaOH solution with a solution temperature of 4° C. and a mass percent concentration of 9 wt % for 5 hours;

[0049] S5, stirring the waste adhesive film obtained in step S4 through a soybean milk machine for 2 minutes;

[0050] Observing the cellulose solution prepared in this example, it was found that after centrifugation at 5000 rpm for 5 minutes, there was no insoluble solid matter at the bottom of the centrifuge tube, and no waste mucofilm fragments were observed under the microscope, indicating that the waste mucofilm had completely dissolved.

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Abstract

The invention discloses a recovery and reusing method of waste adhesive films. After leftover materials and / or adhesive film waste in the cellulose thin film production process are / is sequentially subjected to cutoff, drying, opening, soaking and drying treatment, a cellulose solution with the cellulose content ranging from 1 wt% to 10 wt% can be prepared, and furthermore regenerated cellulose fibers can be prepared and obtained through a wet spinning technology. The method contributes to solving the treatment problems of processing waste of adhesive plants and meanwhile contributes to reasonable utilization of resources; and the process technology is simple, cost is low, environment friendliness is achieved, pollution is avoided, the method contributes to large-scale recovery and reusingof the waste adhesive films, and therefore a green production process for waste adhesive film recovery and reusing is achieved, and wide market application prospects are achieved.

Description

technical field [0001] The invention belongs to the field of natural macromolecules, and also belongs to the fields of chemical engineering, agriculture, and environmental engineering, and in particular relates to a method for recycling waste adhesive films. Background technique [0002] Cellophane is a common adhesive film. Wood pulp or cotton pulp is alkalized, squeezed, crushed, aged, and yellowed, and then dissolved in NaOH solution to make a solution. After aging, impurity and degassing, the solution is squeezed into the coagulation bath through the narrow and long gap in the film pulling machine. It is regenerated to form a cellulose film, which is then stretched, washed, desulfurized, bleached, desalted, plasticized and dried to make cellophane. The drying process of the cellulose film after high-strength drafting can easily cause the curling and thickening of the two edges of the film. In order to ensure the quality of the product, the films on the two edges are usu...

Claims

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Application Information

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IPC IPC(8): D01F2/02C08J11/08C08L1/02
CPCD01F2/02C08J11/08C08J2301/02Y02W30/62
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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