Papermaking method of multi-layer coated high-bulking high-whiteness matte coated paper

A technology of bulk and master paper, which is applied in the field of multi-layer coated high-bulk, high-brightness matt coated paper, which can solve the problems of inability to meet high-end printing, low whiteness, and large roughness, and achieve good printing results. Effect

Active Publication Date: 2020-02-21
HAINAN JINHAI PULP & PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Otherwise, the bulk thickness is greater than 1cm 3 / g matte coated paper machine, but the roughness is greater than 5um, and the whiteness is low, which cannot meet the requirements of high-end printing

Method used

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  • Papermaking method of multi-layer coated high-bulking high-whiteness matte coated paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for making multi-layer coated high-bulk and high-whiteness matt art paper, comprising the following steps:

[0030] S1: Take kraft softwood pulp, bleached kraft hardwood pulp and alkaline hydrogen peroxide mechanical pulp, and mix them at a weight ratio of 20:55:25 to form a slurry mixture; after kraft softwood pulp is beaten, the freeness is 440ml, the bulk thickness is 1.3cm 3 / g; bleached kraft hardwood pulp has a freeness of 390ml and a bulk of 1.3cm after beating 3 / g; Alkaline hydrogen peroxide mechanical pulp has a freeness of 375ml and a bulk of 3.1cm after beating 3 / g, the whiteness is 79%;

[0031] S2: Add ground calcium carbonate and positive starch to the slurry mixture in step S1, and mix thoroughly to obtain base paper pulp; by weight ratio, the base paper pulp includes 93.7% of slurry mixture, 5.6% of ground calcium carbonate, and positive starch 0.7%; the ground calcium carbonate is the ground calcium carbonate C60 processed with polymer (po...

Embodiment 2

[0039] A method for making multi-layer coated high-bulk and high-whiteness matt art paper, comprising the following steps:

[0040] S1: Take kraft softwood pulp, bleached kraft hardwood pulp and alkaline hydrogen peroxide mechanical pulp, and mix them at a weight ratio of 20:55:25 to form a slurry mixture; after kraft softwood pulp is beaten, the freeness is 440ml, the bulk thickness is 1.3cm 3 / g; bleached kraft hardwood pulp has a freeness of 390ml and a bulk of 1.3cm after beating 3 / g; Alkaline hydrogen peroxide mechanical pulp has a freeness of 375ml and a bulk of 3.1cm after beating 3 / g, the whiteness is 79%;

[0041] S2: Add ground calcium carbonate and positive starch to the slurry mixture in step S1, and mix thoroughly to obtain base paper pulp; by weight ratio, the base paper pulp includes 93.7% of slurry mixture, 5.6% of ground calcium carbonate, and positive starch 0.7%; the ground calcium carbonate is the ground calcium carbonate C60 processed with polymer (po...

Embodiment 3

[0049] A method for making multi-layer coated high-bulk and high-whiteness matt art paper, comprising the following steps:

[0050] S1: Take kraft softwood pulp, bleached kraft hardwood pulp and alkaline hydrogen peroxide mechanical pulp, and mix them in a weight ratio of 28:40:32 to form a slurry mixture; the freeness of kraft softwood pulp after beating is 410ml, the bulk thickness is 1.2cm 3 / g; bleached kraft hardwood pulp has a freeness of 420ml and a bulk of 1.4cm after beating 3 / g; Alkaline hydrogen peroxide mechanical pulp has a freeness of 340ml and a bulk of 3.1cm after beating 3 / g, the whiteness is 80%;

[0051] S2: Add ground calcium carbonate and positive starch to the slurry mixture in step S1, and mix thoroughly to obtain base paper pulp; by weight ratio, the base paper pulp includes 97% of size mixture, 2% ground calcium carbonate, and positive starch 1%; the ground calcium carbonate is the ground calcium carbonate C60 processed with a polymer (polyacrylic...

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Abstract

The invention discloses a papermaking method of multi-layer coated high-bulking high-whiteness matte coated paper. According to a preparation method, reasonable slurry selection is carried out, sulfate softwood pulp, bleached sulfate hardwood pulp and alkaline hydrogen peroxide mechanical pulp (the bulk is 3.0 cm<3> / g or above, and the whiteness is 75% or above) are adopted; proportioning of the various slurries are strictly controlled, a special coating formula is adopted; a base coat, a middle coat and a top coat are prepared at different proportions; and a unique MSP (double-sided top coating) and scraper coating process are adopted to perform multi-layer coating, and based on single-layer sandwich base paper with the speed as high as 1300m / min, parameters such as paper machine linear pressure and the like are controlled, so that reasonable microcosmic roughness and whiteness of paper surface are maintained, and obtained finished paper can meet the requirements of high-grade printing. The bulk of the finished paper is greater than or equal to 1cm<3> / g, and the ISO whiteness is greater than or equal to 88%.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a method for making multi-layer coated high bulk high whiteness matte coated paper. Background technique [0002] Matte coated paper is mainly used to produce high-grade books, picture albums, commercial advertisements and other printed matters. Matte coated paper has low gloss and is not dazzling. The printed matter is bright in color and has a strong three-dimensional effect, which is favored by consumers. At present, the development trend of matt coated paper market is good surface feeling, higher bulk, less roughness and higher printing quality. At present, most of the high-bulk matte coated papers on the market are made by fourdrinier paper machines with low machine speeds, while the bulk of the matt coated papers made by single-layer sandwich paper machines is less than 1cm 3 / g, failed to meet the requirements of high bulk. Otherwise, the bulk thickness is greater t...

Claims

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Application Information

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IPC IPC(8): D21H27/00D21D1/02D21H11/04D21F11/00D21H23/34D21G1/00
CPCD21D1/02D21F11/00D21G1/00D21H11/04D21H23/34D21H27/00
Inventor 林彬翁浥程
Owner HAINAN JINHAI PULP & PAPER
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