Preparation method of highly filled bible paper

A technology of bible paper and preparation steps, which is applied in the field of preparation of high-filling bible paper, can solve the problems of low retention rate of fillers, achieve high retention rate and opacity of fillers, improve uniformity and retention rate, The effect of uniform dispersion of fillers

Inactive Publication Date: 2020-12-11
浙江哲丰新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the problem of low retention rate of fillers in bible paper, the present invention provides a preparation method of high filling bible paper, through surface modification of filler, introduction of high fluidity sizing emulsion and improvement of paper preparation process, Finally, a bible paper with good integrity, uniform filler dispersion, high filler retention and high opacity is prepared

Method used

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  • Preparation method of highly filled bible paper

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[0035] A preparation method for high-filling bible paper, comprising the following preparation steps:

[0036](1) Preparation of modified filler isocyanate-modified titanium dioxide: disperse titanium dioxide in ethanol, add aminopropyltriethoxysilane, stir and react for 0.8-1h to obtain amino-modified titanium dioxide; again disperse amino-modified titanium dioxide to N , into N-dimethylformamide, add hexamethylene diisocyanate, stir at 60-70°C for 3-4h to obtain modified filler; titanium dioxide, aminopropyl triethoxysilane and hexamethylene diisocyanate The molar ratio of isocyanate is 1:1-1.2:1-1.2.

[0037] (II) Beating: mix and beat the raw material slurry, modified fillers and auxiliary agents to form a mixed slurry; the raw material slurry includes 25-35% bleached sulfuric acid softwood pulp and 65-75% bleached sulfuric acid broadleaf pulp, The beating concentration is 4.0-5.0%, the beating degree of bleached kraft softwood pulp after beating is 65-75°SR, and the wet ...

Embodiment 1

[0044] A preparation method for high-filling bible paper, comprising the following preparation steps:

[0045] (1) Preparation of modified filler isocyanate-modified titanium dioxide: disperse titanium dioxide in ethanol, add aminopropyltriethoxysilane, stir and react for 0.9h to obtain amino-modified titanium dioxide; again disperse amino-modified titanium dioxide to N, Add hexamethylene diisocyanate to N-dimethylformamide, stir at 65°C for 3.5 hours to obtain a modified filler; the molar weight of titanium dioxide, aminopropyltriethoxysilane and hexamethylene diisocyanate The ratio is 1:1.1:1.1.

[0046] (II) Beating: Mix and beat the raw material slurry, modified fillers and auxiliary agents to form a mixed slurry; the raw material slurry includes 30% bleached sulfuric acid softwood pulp and 70% bleached sulfuric acid broadleaf pulp, and the beating concentration is 4.5%. After beating, the beating degree of bleached kraft softwood pulp is 70°SR, and the wet weight is 5.5g...

Embodiment 2

[0053] A preparation method for high-filling bible paper, comprising the following preparation steps:

[0054] (1) Preparation of modified filler isocyanate-modified titanium dioxide: disperse titanium dioxide in ethanol, add aminopropyltriethoxysilane, stir and react for 0.8h to obtain amino-modified titanium dioxide; again disperse amino-modified titanium dioxide to N, In N-dimethylformamide, add hexamethylene diisocyanate and stir at 60°C for 3 hours to obtain a modified filler; the molar ratio of titanium dioxide, aminopropyltriethoxysilane and hexamethylene diisocyanate 1:1.2:1.

[0055] (II) Beating: Mix and beat the raw material slurry, modified fillers and auxiliary agents to form a mixed slurry; the raw material slurry includes 25% bleached sulfuric acid softwood pulp and 75% bleached sulfuric acid broadleaf pulp, and the beating concentration is 4.0%. After beating, the beating degree of bleached kraft softwood pulp is 65°SR, and the wet weight is 4g; the beating de...

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Abstract

The invention relates to the technical field of papermaking, and provides a preparation method of highly-filled bible paper in order to solve the problem that the retention rate of filler in the biblepaper is low. The preparation method comprises the following steps of: (1) pulping: mixing and pulping raw material pulp, modified filler and an auxiliary agent to prepare mixed pulp; (2) raw paper preparing: sequentially performing alkaline solution soaking, net part dehydration, squeezing and pre-drying on the mixed pulp to obtain raw paper; (3) sizing: entering a surface sizing treatment procedure, and performing surface sizing on the raw paper in the step (2) by adopting a high-pressure filling sizing agent to obtain a paper sheet subjected to surface sizing treatment; and (4) post-treatment: carrying out post-drying, calendaring and finishing on the paper sheet subjected to surface sizing treatment, and rolling to obtain a finished product. By modifying the surface of the filler, introducing the high-fluidity sizing emulsion and improving the paper preparation process, the bible paper which is good in integrity, uniform in filler dispersion, high in filler retention rate and highin opacity is finally prepared.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a method for preparing high-quality Bible-filled paper. Background technique [0002] Bible paper is a high-grade printing paper for offset printing Bibles, dictionaries, pocket manuals, reference books and other books. Its outstanding features are thin paper, low weight, but high opacity. Fillers such as titanium dioxide are widely used as fillers for Bible paper due to their high refractive index, fine particle size, and high whiteness, which can impart good opacity to paper. However, titanium dioxide is expensive, and because of its small particle size and low retention rate, the production cost of high-opacity Bible paper is relatively high. How to improve the utilization rate of titanium dioxide in the simplest way has become a key way to reduce the production cost of high-opacity Bible paper. [0003] Patent No. CN201410004030.X, patent name "Low weight and high opaci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H11/04D21H21/12D21H21/14D21H17/69D21H17/42D21H17/64D21H19/40D21H19/58D21H25/06D21H25/00C08F220/18C08F220/34C08F220/32C08F212/08C08F220/20C08F8/30C08F8/00
CPCD21H11/04D21H21/12D21H21/14D21H17/69D21H17/42D21H17/64D21H19/40D21H19/58D21H25/06D21H25/005C08F220/1804C08F220/325C08F8/30C08F8/00
Inventor 吴小燕丁威谈祥明单升来伍骏实杜文敏
Owner 浙江哲丰新材料有限公司
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