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Recovery processing process for heat transfer printing paper

A technology of thermal transfer printing and recycling, which is applied in pulp dehydration, pulp bleaching, raw material separation, etc., to achieve the effect of reducing papermaking costs, simple process, and good pulping performance

Inactive Publication Date: 2011-06-29
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]With the increase of heat transfer printing paper production, the recycling of waste heat transfer printing paper has attracted more and more attention from all walks of life. These waste papers contain a variety of heat transfer pattern, it is difficult to deink and bleach, and the paper mill has no better solution for this kind of waste paper for the time being

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (2) Add NaClO and Ca(ClO) 2 A mixture with a weight ratio of 1:1, the amount of the mixture is 50kg / ton of thermal transfer printing paper, heated by steam to keep the temperature at 80-90°C and soaked and stirred;

[0027] (3) Add DTPA, NaSiO 3 , MgSO 4 , NaOH and H 2 o 2 , react at 80-90°C for 30-60min to obtain slurry; the amount of hydrogen peroxide is 10kg / ton heat transfer printing paper, the amount of DTPA is 0.5kg / ton heat transfer printing paper, NaSiO 3 The dosage is 40kg / ton heat transfer printing paper, MgSO 4 The dosage is 0.5kg / ton of thermal transfer printing paper, and the dosage of NaOH is 5kg / ton of thermal transfer printing paper;

[0028] (4) Dewater and wash the slurry with an oblique spiral. After washing, dilute the concentration to 3wt% for refining.

[0029] Example 2:

[0030] (1) Add water and thermal transfer printing paper into the pulper, the concentration of thermal transfer printing paper is 15wt%, and soak at 80-90°C;

[0031] ...

Embodiment 2

[0033] (4) Use inclined spiral or drum to dehydrate and wash the slurry. After washing, dilute the concentration to 5wt% for refining.

[0034] Pulp Performance Test

[0035] The pulping obtained in the above-mentioned Examples 1 and 2 was tested for pulp properties, and each test index was an average value, as shown in Table 1 below.

[0036] Table 1 The performance detection index table of the thermal transfer printing pulp obtained by the process of the present invention

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Abstract

The invention relates to the technical field of special paper reclamation, in particular to a recovery processing process for heat transfer printing paper. The process comprises the following steps: adding water and heat transfer printing paper into a pulping machine, and soaking at the temperature between 80 and 90 DEG C; adding hypochlorite, and soaking at the temperature between 80 and 90 DEG C; adding DTPA (diethylene triamine pentacetic acid), NaSiO3, MgSO4, NaOH and H2O2, and reacting 30 to 60 minutes at the temperature of between 80 and 90 DEG C to obtain pulp; and dehydrating and washing the pulp. The hypochlorite is a mixture of NaClO and Ca(ClO)2 in a weight ratio of 1:1. The concentration of the heat transfer printing paper is 5 to 15 weight percent. The process for processing the heat transfer printing paper has simple flow and good pulp forming performance; and the pulp can be used as an ingredient of high-grade paper such as toilet paper, coating base paper and the like, and can greatly reduce the papermaking cost by replacing imported bleached needle bush or broadleaf wood pulp.

Description

technical field [0001] The invention relates to the technical field of special paper recycling, in particular to a recycling process for thermal transfer printing paper. Background technique [0002] In recent years, special paper has sprung up in the domestic paper market and developed rapidly. Thermal transfer printing paper is a new type of special paper, which is mainly composed of multiple layers such as thermal transfer paper, ink layer, transparent release layer and adhesive layer. It is used in the textile printing and dyeing industry. Transfer printing is a relatively new printing technology. It is a milestone technical invention in the printing and dyeing industry. The popularization and application of household inkjet printers has promoted the development speed of this technology. At present, this technology has spread all over Europe and the United States. Around the world, such as Australia, Africa and Asia, the output of thermal transfer printing paper is in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21B1/34D21C9/12D21C9/18
Inventor 赵传山吴朝军于冬梅王代启王晶晶
Owner QILU UNIV OF TECH
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