CN102108645A

CN102108645A - Recovery processing process for heat transfer printing paper

Info

Publication number: CN102108645A
Application number: CN 201010593827
Authority: CN
Inventors: 赵传山; 吴朝军; 于冬梅; 王代启; 王晶晶
Original assignee: Shandong Institute of Light Industry
Current assignee: Shandong Institute of Light Industry
Priority date: 2010-12-17
Filing date: 2010-12-17
Publication date: 2011-06-29
Anticipated expiration: 2030-12-17
Also published as: CN102108645B

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

A kind of recovery processing technique of thermal transfer printing paper

Technical field

The present invention relates to speciality paper reuse technology field, particularly a kind of recovery processing technique of thermal transfer printing paper.

Background technology

In recent years, speciality paper paper market at home is a dark horse, and development is rapid, and thermal transfer printing paper is a kind of novel speciality paper, mainly form, mainly in textile printing and dyeing industry, use to some extent by multilayers such as heat-transferring printing paper, ink lay, transparent abscission layer and adhesive phases.Transfer printing is newer a kind of printing technique, it is that dyeing has a landmark technological invention, family ink-jet printer apply the development speed that has promoted this technology, this kind technology has spreaded all over Europe, the United States, Australia, Africa and Asia etc. all over the world at present, and the output of thermal transfer printing paper rises just year by year.

Increase along with thermal transfer printing paper output, the regeneration of used heat transfer printing paper more and more is subjected to the attention of various circles of society, contain multiple heat in these waste paper and shift pattern, be difficult to deinking and bleaching, paper plant does not temporarily have preferable scheme to the processing of this class waste paper.

Summary of the invention

In order to overcome the above problems, the invention provides a kind of recovery processing technique of used heat transfer printing paper.

The characteristics of this technology are: at first by means of the different component in the bleaching chemical different printing residual ink in the used heat transfer printing paper is degraded, decoloured and bleaches, the destruction fiber links with printing ink itself, after the bleaching,, obtain the slurry of finished product through inclined screw or rotary drum dehydration washing.

The present invention is achieved by the following measures:

A kind of recovery processing technique of thermal transfer printing paper is characterized in that may further comprise the steps:

(1) water, thermal transfer printing paper are added in the pulper, under 80-90 ℃ of condition, soak;

(2) add hypochlorite, under 80-90 ℃ of condition, soak;

(3) add DTPA, NaSiO ₃, MgSO ₄, NaOH and H ₂O ₂, reaction 30-60min gets slurry under 80-90 ℃ of condition;

(4) to the slurry washing of dewatering.

Described hypochlorite is NaClO and Ca (ClO) ₂Weight ratio is the mixture of 1:1.

The concentration of preferred thermal transfer printing paper is 5-15wt%.

Preferred hypochlorite consumption is a 50-70kg/ ton thermal transfer printing paper, and the hydrogen peroxide consumption is a 10-30kg/ ton thermal transfer printing paper, and the DTPA consumption is a 0.5kg/ ton thermal transfer printing paper, NaSiO ₃Consumption is a 40kg/ ton thermal transfer printing paper, MgSO ₄Consumption is a 0.5kg/ ton thermal transfer printing paper, and the NaOH consumption is a 5kg/ ton thermal transfer printing paper.

The preferred Steam Heating of using in whole technical process.

Preferred inclined screw or the rotary drum of using is to the slurry washing of dewatering in the step (4).

To preferably concentration dilution being carried out defibrination to 3-5wt% after the de-watering of slurries washing.

Stir when soaking in the preferred whole technical process.

Described DTPA is a diethyl pentetic acid.

The invention has the beneficial effects as follows: adopt PROCESS FOR TREATMENT thermal transfer printing paper of the present invention, flow process is simple, and slurry performance is good, can be used for the batching of high-grade paper such as toilet paper, bodystock paper, be used for substituting import bleaching needlebush or hardwood pulp, can greatly reduce and copy the paper cost.

The specific embodiment

For a better understanding of the present invention, further specify below in conjunction with specific embodiment.

Embodiment 1:

The used heat transfer printing paper of Korea S is mainly prepared burden and is wood pulp on the market, is extraordinary fibrous raw material, contains multiple heat in these waste paper and shifts pattern, is made up of shades of colour printing ink, is difficult to deinking and bleaching.

This used heat transfer printing paper adopts technological process of the present invention and step to recycle, and process is as follows:

(1) water, thermal transfer printing paper are added in the pulper, the concentration of thermal transfer printing paper is 5wt%, soaks under 80-90 ℃ of condition;

(2) add NaClO and Ca (ClO) ₂Weight ratio is the mixture of 1:1, and amount of mixture is a 50kg/ ton thermal transfer printing paper, and Steam Heating makes temperature remain on immersion and stirring under the 80-90 ℃ of condition;

(3) add DTPA, NaSiO ₃, MgSO ₄, NaOH and H ₂O ₂, reaction 30-60min gets slurry under 80-90 ℃ of condition; The hydrogen peroxide consumption is a 10kg/ ton thermal transfer printing paper, and the DTPA consumption is a 0.5kg/ ton thermal transfer printing paper, NaSiO ₃Consumption is a 40kg/ ton thermal transfer printing paper, MgSO ₄Consumption is a 0.5kg/ ton thermal transfer printing paper, and the NaOH consumption is a 5kg/ ton thermal transfer printing paper;

(4) use inclined screw to the slurry washing of dewatering.After the washing concentration dilution is carried out defibrination to 3wt%.

Embodiment 2:

(1) water, thermal transfer printing paper are added in the pulper, the concentration of thermal transfer printing paper is 15wt%, soaks under 80-90 ℃ of condition;

(2) add NaClO and Ca (ClO) ₂Weight ratio is the mixture of 1:1, and amount of mixture is a 70kg/ ton thermal transfer printing paper, and Steam Heating makes temperature remain on immersion and stirring under the 80-90 ℃ of condition;

(3) add DTPA, NaSiO ₃, MgSO ₄, NaOH and H ₂O ₂, reaction 30-60min gets slurry under 80-90 ℃ of condition; The hydrogen peroxide consumption is a 30kg/ ton thermal transfer printing paper, and the DTPA consumption is a 0.5kg/ ton thermal transfer printing paper, NaSiO ₃Consumption is a 40kg/ ton thermal transfer printing paper, MgSO ₄Consumption is a 0.5kg/ ton thermal transfer printing paper, and the NaOH consumption is a 5kg/ ton thermal transfer printing paper;

(4) use inclined screw or rotary drum to the slurry washing of dewatering.After the washing concentration dilution is carried out defibrination to 5wt%.

The pulp property test

The pulping that the foregoing description 1 and 2 is obtained carries out the pulp property detection, and every detection index is mean value, and is as shown in table 1 below.

The Performance Detection index table of table 1 technology gained of the present invention thermal transfer printing paper pulp

Yield/%	88
		Beating/ ^oSR	22.0
Weight in wet base/g	3.7
		Quantitatively/g/m ²	60.0
Whiteness/%ISO	82.5
		Tensile index/Nm/g	8.3

Every data in the table show that all other indexs of used heat transfer printing paper pulp are all better, can substitute the part commercial wood pulp medium-to-high grade paper of manufacturing paper with pulp, and good value is arranged.

Claims

1. the recovery processing technique of a thermal transfer printing paper is characterized in that may further comprise the steps:

(2) add hypochlorite, under 80-90 ℃ of condition, soak;

(4) to the slurry washing of dewatering.

2. technology according to claim 1 is characterized in that described hypochlorite is NaClO and Ca (ClO) ₂Weight ratio is the mixture of 1:1.

3. technology according to claim 1 and 2, the concentration that it is characterized in that thermal transfer printing paper is 5-15wt%.

4. technology according to claim 1 and 2 is characterized in that the hypochlorite consumption is a 50-70kg/ ton thermal transfer printing paper, and the hydrogen peroxide consumption is a 10-30kg/ ton thermal transfer printing paper, and the DTPA consumption is a 0.5kg/ ton thermal transfer printing paper, NaSiO ₃Consumption is a 40kg/ ton thermal transfer printing paper, MgSO ₄Consumption is a 0.5kg/ ton thermal transfer printing paper, and the NaOH consumption is a 5kg/ ton thermal transfer printing paper.

5. technology according to claim 1 and 2 is characterized in that using Steam Heating in whole technical process.

6. technology according to claim 1 and 2 is characterized in that using in the step (4) inclined screw or rotary drum to the slurry washing of dewatering.

7. technology according to claim 1 and 2 is characterized in that after the de-watering of slurries washing concentration dilution being carried out defibrination to 3-5wt%.

8. technology according to claim 1 and 2 stirs when it is characterized in that soaking in the whole technical process.