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Method for producing coated paper

A manufacturing method and technology of coated paper, applied in the field of coated paper manufacturing, can solve problems such as insufficient resistance to damage on the surface of feeding rollers, and achieve white paper with excellent gloss, less ink unevenness, and surface excellent effect

Inactive Publication Date: 2010-12-08
NIPPON PAPER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are insufficient in terms of resistance to damage to the surface of the feed roller, especially at a working speed of 1300 m / min or more, and improvement is required.

Method used

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  • Method for producing coated paper
  • Method for producing coated paper
  • Method for producing coated paper

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0081]

[0082] (1) Glossiness of white paper

[0083] According to JISP-8142, it measures at an angle of 75 degrees.

[0084] (2) High-speed operability

[0085] The workability during high-speed operation is based on the viewpoint that paper breakage is less likely to occur in the press section, the occurrence of mist during coating is less, the occurrence of shrinkage lines during calendering is less, and the durability of the elastic roll is high. 4 grades were evaluated.

[0086] ◎=very good, ○=good, △=slightly bad, ×=poor

[0087] (3) Minor gloss unevenness

[0088] The minute gloss unevenness of the final product was visually evaluated on the following four scales.

[0089] ◎=none, ○=almost none, △=slightly present, ×=extremely uneven gloss

[0090] (4) Uneven ink filling

[0091] Using a Roland sheet-fed printing machine (4 colors), use printing ink (Hy-UnityM manufactured by Toyo Ink) in the order of blue→red→yellow→black at a printing speed of 8000 sheets / min...

Embodiment 1

[0094] To the pulp liquid composed of 30 parts of old paper pulp and 70 parts of LBKP, light calcium carbonate was added as a filler so that the ash content in the paper reached 11%, and 3 parts of cationized starch was added as an internal paper strength agent to adjust the paper quality. material.

[0095] Use this paper stock, with the papermaking speed of 1600m / min roll and scraper former type paper machine, use 2 tandem shoe presses in the press section (press line pressure 1000kN / m, transmission The belt is in contact with the wire side of the paper of the second station), the wet paper is squeezed and dried, and the dried base paper is made into paper, and then the solid content is Concentration of 6% oxidized starch solution on both sides with 1.6g / m 2 Coated and dried to obtain 45.6g / m 2 of groundwood-containing (medium) coated base paper.

[0096] Next, 4.5 parts of oxidized starch and 8.2 parts of carboxy-modified styrene-butadiene copolymer latex were mixed with...

Embodiment 2

[0100] Coated paper was produced in exactly the same manner as in Example 1 above, except that the surface temperature of the metal roll in the first nip was changed to 60° C. in the processing step.

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Abstract

Provided is a method for producing a high-quality coated paper with high operability, while preventing the surface of an elastic roll of a soft calender from being scratched during a high speed operation. A method for producing a coated paper comprises a step of making a base paper, a step of providing one or more pigment coating layers by applying a coating liquid containing a pigment and an adhesive onto the base paper, and a step of performing a surface treatment of the pigment coating layers by means of a soft calender. In the method, the operating speed of the papermaking step and the coating step is 1300 m / min, the outermost pigment coating layer is treated with two or more nips in the surface treatment step by using a soft calender consisting of a metal roll and an elastic roll, the Shore D hardness of the elastic roll is 90-96, and the surface temperature of the metal roll at the first nip is lower than 130 DEG C.

Description

technical field [0001] The present invention relates to a method for producing coated paper. In particular, the present invention relates to a method for producing a coated paper in which a coating liquid containing a pigment and a binder is applied to base paper and polished by soft calendering, and the surface texture (surface) A method for producing a coated printing paper that is excellent in shape) and less uneven in ink (flesh) printing. Background technique [0002] In recent years, the demand for coated paper for printing has been increasing in the field of commercial printing for the purpose of advertising and publicity, such as leaflets, catalogs, brochures, and mailers. Although the commodity value of these commercial printed matter itself is low, since it is important to achieve the purpose as a publicity medium, low cost and excellent printing process are required. In response to such a strong demand for coated paper, paper manufacturers are increasing the wid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H19/36D21G1/00
CPCD21H25/14D21H23/56D21H19/82D21H19/36
Inventor 吉松丈博阿部勇二榊原大介浅野裕则
Owner NIPPON PAPER IND CO LTD
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