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Newsprint for affset print

A technology of offset printing and newsprint, which is applied in papermaking, paper coating, textiles and papermaking, etc. It can solve the problems of easy powder falling, high oil absorption, unsuitability, etc., and achieve the effect of good ink fixation and good opacity

Inactive Publication Date: 2007-12-26
OJI PAPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the method of improving opacity by providing a coating layer containing needle-like pigments and containing pigments with an average oil absorption of 65 cc / 100g or more (Patent Document 3) is the same as the above, because the pigment has a high oil absorption, so it is easy to cause powder falling, In order to make up for this shortcoming, it is necessary to use mechanical pulp as the main body, or apply 10g / m 2 About the amount of coating, so it is not suitable for the current high-speed printing

Method used

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  • Newsprint for affset print

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0122] Base paper: 10 parts of coniferous kraft pulp, 20 parts of preheated mechanical pulp, and 70 parts of deinked waste paper pulp are mixed and macerated, and the degree of freedom is adjusted to 120mlCSF (Canadian standard degree of freedom, below) with a refiner (Refiner). To the raw pulp of CSF), 0.5% of cationized starch (trade name: P3Y, manufactured by PIRAABSTARCH Co., Ltd.) was added to absolute dry pulp, and talc (NTP-2, manufactured by Nippon Talc Co., Ltd.) was added as seasoning 2%, white carbon (self-made) 2%, papermaking pH is adjusted to 5 with alum. The obtained paper stock was made into paper using a paper machine in the twin-wire form (MH specification).

[0123] Coating: As a coating solution, 70 parts of calcium carbonate (A), 30 parts of kaolin (C), 43 parts of oxidized starch (manufactured by Oji Engineering Co., Ltd.), latex (styrene-butadiene copolymer, trade name : T-2635R, manufactured by JSR Co., Ltd., water-dispersible adhesive) 17 parts, surfa...

Embodiment 2

[0129] In the coating process, except that the coating amount of the pigment layer is 2.8g / m 2 Newsprint for offset printing was obtained in the same manner as in Example 1 except for coating.

Embodiment 3

[0131] In the coating process, except that the coating amount of the pigment layer is 0.7g / m 2 Newsprint for offset printing was obtained in the same manner as in Example 1 except for coating.

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Abstract

This invention provides a kind of news paper used in high speed cold offset point cycle printing and a news paper suitable for printing with environment protection printing ink, which forms a dye coating containing CaCO3 on the two sides of base paper to be converted to dry solid component and the total coating volume of the two sides is 0.5-3.0g / m2, whiteness is greater than or equal to 54% and ash is 5-15 mass%, non-transparency is greater than or equal to 90%, dynamic friction coefficient is 0.50-0.65, the basic weight is 37-45 / m2.

Description

technical field [0001] The present invention relates to newsprint paper mainly for so-called daily newsprint, which is mass-produced and printed every day, and particularly relates to rotary offset printing in which printing is performed by a so-called cold-set printing machine without drying with a heat dryer after printing Use newsprint. Background technique [0002] Before this, newsprint had been developed in terms of lightweighting. Around 1980, from the previous 49g / m 2 Lightweight began to be popularized, and around 1990, 46g / m 2 become mainstream. After that, 43g / m 2 It became the mainstream again, and by 2001, it was 40g / m as the XL class 2 The ultra-lightweight paper has also started to market so far. With this situation, there is a strong demand for paper to maintain high opacity after printing. Therefore, in order to increase the opacity of paper, inorganic particles such as white carbon, calcium carbonate, titanium oxide, or talc are often used as fillers ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H19/84D21H19/38D21H19/44D21H19/54D21H21/54
Inventor 渡边邦彦冈田比斗志
Owner OJI PAPER CO LTD
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