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Film coatedbasepaper and bagasse pulp for film coatedbasepaper

A technology of coating base paper and bagasse pulp, which is applied in pulp bleaching, cellulose pulp post-treatment, non-woody plant/crop pulp, etc., can solve the problems of high viscosity of black liquor recovery, high recovery cost, and poor bleaching, etc. Achieve the effect of reducing invalid decomposition, improving utilization rate, optimizing whiteness and viscosity

Inactive Publication Date: 2017-05-10
芜湖市哈贝纸业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with film and other non-wood raw materials and wood raw materials, sugarcane has its own particularity, the traditional pulping process of wood raw materials is directly used for bagasse pulp, often resulting in poor bleaching, high viscosity of black liquor recovery, resulting in high recycling costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of bagasse pulp for coating base paper, obtained by the following steps:

[0030] S1, dedusting and pitting the bagasse after air-drying, adding ammonia water, alkali and anthraquinone as cooking agent, the consumption of ammonia water is 20% of absolute dry bagasse weight, the alkali consumption is 3% of absolute dry bagasse weight, and the amount of anthraquinone is absolute Dry bagasse by 0.1% by weight, then add distilled water to soak in 6 times the weight of absolute dry bagasse to obtain mixed bagasse;

[0031] S2. Put the mixed bagasse into a digester, heat up to 100° C., cook for 50 minutes, cool to room temperature, wash, and concentrate until the pulp is 5% to obtain a bagasse coarse pulp;

[0032] S3, adding hydrogen peroxide and modified zeolite to the bagasse coarse pulp, the consumption of hydrogen peroxide is 2% of the weight of the absolute dry bagasse coarse pulp, and the amount of modified zeolite is 1% of the weight of the absolute dry bagasse...

Embodiment 2

[0035] A kind of bagasse pulp for coating base paper, obtained by the following steps:

[0036] S1, the air-dried bagasse is dedusted and pith-removed, and ammonia water, alkali and anthraquinone are added as a cooking agent, the amount of ammonia water is 30% of the absolute dry bagasse weight, the alkali amount is 9% of the absolute dry bagasse weight, and the anthraquinone amount is absolute Dry bagasse by 0.2% by weight, then add distilled water to soak in 10 times the weight of absolute dry bagasse to obtain mixed bagasse;

[0037] S2. Put the mixed bagasse into a digester, heat up to 150° C., cook for 30 minutes, cool to room temperature, wash, and concentrate until the pulp is 12% to obtain a bagasse coarse pulp;

[0038] S3, adding hydrogen peroxide and modified zeolite to the bagasse coarse pulp, the consumption of hydrogen peroxide is 5% of the weight of the absolute dry bagasse coarse pulp, and the amount of modified zeolite is 5% of the weight of the absolute dry b...

Embodiment 3

[0041] A kind of bagasse pulp for coating base paper, obtained by the following steps:

[0042] S1, the air-dried bagasse is dedusted and pith-removed, and ammonia water, alkali and anthraquinone are added as a cooking agent. The weight of dry bagasse is 0.13%, and then add distilled water to soak for 60 minutes according to 7 times the weight of absolute dry bagasse to obtain mixed bagasse;

[0043] S2. Put the mixed bagasse into a digester, heat up to 125° C. within 40 minutes, cook for 40 minutes, cool to room temperature, wash, and concentrate until the pulp is 10% to obtain bagasse coarse pulp;

[0044] S3, adding hydrogen peroxide and modified zeolite to the bagasse coarse stock, the consumption of hydrogen peroxide is 3% of the weight of the absolute dry bagasse coarse stock, and the amount of modified zeolite is 2% of the weight of the absolute dry bagasse coarse stock, adding the absolute dry The alkali of 1.2% of the weight of the bagasse coarse pulp is heated to 70...

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PUM

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Abstract

The invention discloses a bagasse pulp for a film coatedbasepaper. The bagasse pulp is obtained by the following steps that: step 1, after drying the bagasse, dust and pith are removed from the bagasse, and ammonia, alkali and anthraquinone are added to the bagasse as cooking agents, distilled water is added to immerse the bagasse, and a mixed bagasse is obtained; step 2, the mixed bagasse is put in a digester, temperature is raised to 100-150 DEG C to boil the mixed bagasse, cooling, washing and concentrating are conducted to obtain a coarse bagasse pulp; step 3, hydrogen peroxide and modified zeolite are added to the bagasse pulp, a first adding of an alkali, a first heating to 50-90 DEG C, a first thermal insulation, a second adding of an alkali, a second heating to 70-100 DEG C, and a second thermal insulation are conducted, a bleached bagasse pulp is obtained; step 4, the bleached bagasse pulp is diluted, washed and purified to neutral, and is concentrated to obtain the bagasse pulp for film coatedbasepaper; the invention also discloses a film coatedbasepaper. Base slurry of the film coatedbasepaper is obtained by boiling the bagasse using ammonia method, the cost-recovering of black liquor is reduced, the modified zoelite is used as stabilizer, the efficiency of bleaching is improved, the paper pulp process design is reasonable, and the economic benefits of the film coatedbasepaper is improved.

Description

technical field [0001] The invention relates to the technical field of coated base paper, in particular to a coated base paper and bagasse pulp for the coated base paper. Background technique [0002] Laminated base paper is a kind of cardboard specially used for laminating cups. It has high stiffness and high water resistance, and is generally not coated. Coating (and printing) is carried out on the coated base paper, and then used to make coated paper for containing and storing liquids. Currently commercially available coated paper is mainly made of coniferous wood pulp and hardwood wood pulp. With the gradual reduction of wood production in my country and the scarcity of natural materials, it is becoming more and more important to look for alternative wood pulp, more environmentally friendly, and raw paper pulp materials. One of the difficult problems that need to be overcome in the paper industry and related fields. [0003] Bagasse is a by-product of the sugar industry...

Claims

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Application Information

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IPC IPC(8): D21H11/12D21C5/00D21C9/16D21C9/10
CPCD21H11/12D21C5/00D21C9/1026D21C9/163
Inventor 李先明
Owner 芜湖市哈贝纸业有限公司
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