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Manufacturing method of top-grade ivory white offset printing paper

A white offset, printing paper technology, applied in papermaking, paper, paper coatings, etc., can solve the problems of high calendering pressure and difficult to increase stiffness, and achieve fine surface, pure white paper, and high color reproduction of printed products. Effect

Active Publication Date: 2015-12-16
YUEYANG FOREST & PAPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The higher the fineness of the paper, the higher the requirement for its surface smoothness, and the greater the calendering pressure, making it difficult to increase the stiffness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The raw material of poplar wood is prepared, and the pulping process is made by PRC-APMP (P stands for pretreatment before refining, stands for the chemical action of disc refining to promote pulp, APMP stands for alkaline hydrogen peroxide mechanical pulp) with a whiteness of 75%ISO , percussion degree 52-57 0 SR poplar chemical pulp, purchased bleached kraft softwood pulp to 44 0 SR, bleached kraft hardwood pulp beaten to 36 0 SR, wherein, in the beating process of NBKP and LBKP, 0.6kg / t pulp sodium carboxymethylcellulose (CMC) is added when pulping. The above three kinds of pulp are mixed according to the ratio of 15% poplar chemical mechanical pulp, 25% bleached kraft softwood pulp, and 60% bleached kraft hardwood pulp. After mixing, the pulp is adjusted to a concentration of 3.5%. Starch enhancer, repulping, desanding and degassing, sizing, fine sieving, net forming dehydration, pressing, pre-drying, drying after surface sizing, calendering, coiling, and packagin...

Embodiment 2

[0023] The raw material of poplar wood is prepared, and the pulping process is made by PRC-APMP (P stands for the pretreatment before refining, which stands for the chemical effect of disc refining, and APMP stands for alkaline hydrogen peroxide mechanical pulp) with a whiteness of 75%ISO , percussion degree 52-57 0 SR poplar chemical pulp, purchased bleached kraft softwood pulp to 46 0 SR, bleached kraft hardwood pulp beaten to 35 0 SR, among them, in the beating process of NBKP and LBKP, 1.2kg / t pulp sodium carboxymethylcellulose (CMC) is added when pulping. The above three kinds of pulp are mixed according to the ratio of 5% poplar chemical mechanical pulp, 25% bleached kraft softwood pulp, and 70% bleached kraft hardwood pulp. After mixing, the pulp is adjusted to a concentration of 3.3%. Starch enhancer, repulping, desanding and degassing, sizing, fine sieving, online forming dehydration (controlling online concentration 1.0%, online pH value 7.6), pressing, pre-drying,...

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PUM

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Abstract

The invention discloses a manufacturing method of top-grade ivory white offset printing paper. Bleached sulfate needlebush chemical pulp NBKP, bleached sulfate broad-leaf wood chemical pulp LBKP and alkaline hydrogen peroxide bleached cotton wood mechanical pulp APMP are used as fiber raw materials to carry out the papermaking, and a product is manufactured by virtue of thick pulp screening, mixing, slushing, sand and gas removal, sizing, fine screening, net-part dewatering forming, squeezing, pre-drying, surface gluing, post-drying, press polishing, coiling and packing. Each sizing agent comprises the following components by weight percent: 10 to 30 percent of the bleached sulfate needlebush chemical pulp NBKP, 50 to 70 percent of bleached sulfate broad-leaf wood chemical pulp LBKP, and 5 to 20 percent of alkaline hydrogen peroxide bleached cotton wood mechanical pulp APMP. The prepared top-grade ivory white offset printing paper is pure white and bulking in paper tissue, exquisite in surface, high in color restoration degree of a printed product and smooth in writing; and meanwhile, the surface strength of the paper can meet the 8-color commercial roller transfer printing requirement.

Description

technical field [0001] The invention relates to a method for manufacturing high-grade ivory white offset printing paper. Background technique [0002] With the improvement of our country's national living standards, people have higher and higher requirements for cultural paper. Some high-end magazines, high-quality books, high-end notebooks and calligraphy paper require paper to be pure white, bulky, and delicate. The printed matter has a high degree of color reproduction, good stiffness, and smooth writing. At the same time, the surface strength of the paper is required to meet the requirements of 8-color commercial rotary printing. [0003] Traditionally, to make the paper ISO whiteness reach or approach 90%, at the same time, it is necessary to mix a certain proportion of mechanical pulp, and generally use brighteners, which are neither environmentally friendly nor conducive to eye protection. . In addition, to meet the bulkiness of the paper, it is often necessary to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H15/10D21H17/26D21H21/16D21H21/06D21H19/14D21H19/20
Inventor 朱宏伟万春华陈金山刘春景李丹
Owner YUEYANG FOREST & PAPER CO LTD
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