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A method based on the dissolution, recycling and reuse of damaged impregnated paper and impregnated paper cutting scraps

A technology of impregnated paper and scraps, which is applied in the field of dissolution, recycling and reuse of damaged impregnated paper and trimmed scraps of dipped paper, and can solve problems such as environmental damage and waste of trimmed scraps of dipped paper

Active Publication Date: 2021-09-14
廊坊民丰木业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the serious waste of damaged impregnated paper and impregnated paper cutting scraps, the process design of efficient recovery of impregnated paper is carried out, based on impregnated paper production and wood-based panel production enterprises, to solve the problem of environmental damage caused by impregnated paper treatment, and to create and improve impregnated paper. Paper reuse rate, the invention provides a method based on the dissolution, recycling and reuse of damaged impregnated paper and impregnated paper cutting scraps

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Put 10g of crushed impregnated paper (impregnated with melamine formaldehyde resin) in a 1000ml flask, weigh 20g of NaOH solids and 45g of urea solids with a balance and place them in a 1000ml beaker, add water and set the volume to 1000ml (dissolve while stirring), Add the prepared alkali treatment reagent into the flask with impregnated paper and carry out alkali treatment in a constant temperature water bath. The temperature is 85°C and the time is 120 min. After alkali treatment, wash with deionized water until the pH is 6.8-7.2. Put the washed paper into a beaker and add deionized water for ultrasonic dispersion treatment, and use an ultrasonic generator to treat the impregnated paper to make it into a dispersion. Set the ultrasonic treatment power to 70%, and the ultrasonic time to 20 minutes. After the ultrasonic treatment in the previous step, the paper dispersion was obtained, and 140ml of methanol and 100ml of acetone were added to the beaker for the first ste...

Embodiment 2

[0016] Place 15g of broken impregnated paper (impregnated with melamine formaldehyde resin) in a 1000ml flask, weigh 20g of NaOH solids and 45g of urea solids with a balance and place them in a 1000ml beaker, add water and set the volume to 1000ml (dissolve while stirring), Add the prepared alkali treatment reagent into the flask with impregnated paper, and carry out alkali treatment in a constant temperature water bath. The temperature is 90°C and the time is 120 minutes. After alkali treatment, wash with deionized water until the pH is 6.8-7.2. Put the washed paper into a beaker and add deionized water for ultrasonic dispersion treatment, and use an ultrasonic generator to treat the impregnated paper to make it into a dispersion. Set the ultrasonic treatment power to 70%, and the ultrasonic time to 20 minutes. After the ultrasonic treatment in the previous step, the paper dispersion was obtained, and 150ml of methanol and 100ml of acetone were added to the beaker for the fir...

Embodiment 3

[0018] Put 10g of crushed impregnated paper (impregnated with melamine formaldehyde resin) in a 1000ml flask, weigh 20g of NaOH solids and 45g of urea solids with a balance and place them in a 1000ml beaker, add water and set the volume to 1000ml (dissolve while stirring), Add the prepared alkali treatment reagent into the flask with impregnated paper, and carry out alkali treatment in a constant temperature water bath. The temperature is 85°C and the time is 120 minutes. After alkali treatment, wash with deionized water until the pH is 6.8-7.2. Put the washed paper into a beaker and add deionized water for ultrasonic dispersion treatment, and use an ultrasonic generator to treat the impregnated paper to make it into a dispersion. Set the ultrasonic treatment power to 70%, and the ultrasonic time to 20 minutes. After the ultrasonic treatment in the previous step, the paper dispersion was obtained, and 140ml of methanol and 100ml of acetone were added to the beaker for the firs...

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PUM

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Abstract

The invention discloses a method for dissolving, recycling and reusing based on damaged impregnated paper and cut scraps of impregnated paper, comprising the following steps: mixing sodium hydroxide and urea in proportion, adding a certain amount of deionized water, and Stir on the mixer until the urea is completely dissolved, put the impregnated paper crushed by the pulverizer into the flask for stirring, use the sodium hydroxide urea solution to pre-dissolve the swelling effect of the paper fiber, wash and filter it with deionized water for later use. After the filtered impregnated paper is ultrasonically treated and dissolved by adding a mixed solvent, the recycled pulp can be obtained, which can be used to produce packaging paper. The present invention makes full use of the principle of similar compatibility and swelling effect. On the one hand, a new type of organic solvent is prepared, and on the other hand, it can also provide a new application way for recycling and reusing a large number of damaged impregnated paper and impregnated paper trimmings. Companies producing impregnated paper bring added value.

Description

technical field [0001] The invention relates to a method for dissolving and reusing impregnated paper, in particular to a method for dissolving, recycling and reusing based on damaged impregnated paper and cut leftovers of the impregnated paper. Background technique [0002] Impregnated paper plays an important role in the production of wood processing industry. The serious waste of leftovers of impregnated paper is extremely serious, and it also pollutes the environment to a certain extent. Using melamine-formaldehyde resin (MF) impregnating solution to impregnate the surface of printed decorative paper veneer wood-based panels is widely used in furniture production. At present, impregnated paper manufacturers usually use MF impregnated once, and then apply MF impregnated liquid on one side by roller coating for the second time. Impregnated paper is popular because of its excellent properties such as wear resistance, flame retardancy, environmental protection, and aestheti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21B1/32D21B1/30D21C3/20
CPCD21B1/303D21B1/32D21C3/20Y02W30/64
Inventor 王欣牛耕芜张成林吕悦孝红岭
Owner 廊坊民丰木业有限公司