Kraft paper

A kraft cardboard and kraft technology, applied in the field of papermaking, can solve the problems of peeling off the surface layer, prone to blooming in printing, low bonding strength, etc. Effect

Inactive Publication Date: 2017-12-15
田秋珍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention: Aiming at the problems of the existing kraft cardboard with low bonding strength, the surface layer is prone to peeling off, etc., and the later printing is prone to blooming, etc., a kind of kraft cardboard is provided

Method used

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  • Kraft paper

Examples

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example 1

[0024]Pour the rice husk and water into the fermenter at a mass ratio of 1:20, then add distiller's grains 0.4 times the mass of the rice husk, stir and mix with a wooden stick for 20 minutes, seal the fermenter, leave it to stand for 15 days in a closed fermentation, filter, Obtain a filter cake, and wash the filter cake with deionized water for 5 times, then transfer the washed filter cake to a freeze pulverizer, use liquid nitrogen as a grinding medium, freeze and pulverize for 40 min, discharge, and obtain rice husk scraps, and then Rice husk fragments and 15% hydrogen peroxide were poured into the reaction kettle at a mass ratio of 1:80, and stirred at a constant temperature for 6 hours at a temperature of 50°C and a rotation speed of 500r / min, and then filtered to obtain a filter residue, which was used to Wash the filter residue 5 times with deionized water, then transfer the washed filter residue to an oven, and dry it to a constant weight at a temperature of 110°C to o...

example 2

[0026] Pour the rice husk and water into the fermenter at a mass ratio of 1:20, then add distiller's grains 0.4 times the mass of the rice husk, stir and mix with a wooden stick for 20 minutes, seal the fermenter, leave it to stand for 15 days in a closed fermentation, filter, Obtain a filter cake, and wash the filter cake with deionized water for 5 times, then transfer the washed filter cake to a freeze pulverizer, use liquid nitrogen as a grinding medium, freeze and pulverize for 40 min, discharge, and obtain rice husk scraps, and then Rice husk fragments and 15% hydrogen peroxide were poured into the reaction kettle at a mass ratio of 1:80, and stirred at a constant temperature for 6 hours at a temperature of 50°C and a rotation speed of 500r / min, and then filtered to obtain a filter residue, which was used to Wash the filter residue 5 times with deionized water, then transfer the washed filter residue to an oven, and dry it to a constant weight at a temperature of 110°C to ...

example 3

[0028] Pour the rice husk and water into the fermenter at a mass ratio of 1:20, then add distiller's grains 0.4 times the mass of the rice husk, stir and mix with a wooden stick for 20 minutes, seal the fermenter, leave it to stand for 15 days in a closed fermentation, filter, Obtain a filter cake, and wash the filter cake with deionized water for 5 times, then transfer the washed filter cake to a freeze pulverizer, use liquid nitrogen as a grinding medium, freeze and pulverize for 40 min, discharge, and obtain rice husk scraps, and then Rice husk fragments and 15% hydrogen peroxide were poured into the reaction kettle at a mass ratio of 1:80, and stirred at a constant temperature for 6 hours at a temperature of 50°C and a rotation speed of 500r / min, and then filtered to obtain a filter residue, which was used to Wash the filter residue 5 times with deionized water, then transfer the washed filter residue to an oven, and dry it to a constant weight at a temperature of 110°C to ...

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Abstract

The invention relates to kraft paper and belongs to the technical field of papermaking. The kraft paper comprises a kraft paper body paper and a coating, wherein the coating comprises a surface coating material, a middle coating material and a bottom coating material sequentially from top to bottom; the surface coating material is prepared from raw materials in parts by weight as follows: 8-10 parts of nano magnesia and 60-80 parts of a nano styrene-acrylic emulsion; the middle coating material is prepared from raw materials in parts by weight as follows: 8-10 parts of modified rice husk, 0.5-0.8 parts of casein and 60-80 parts of a waterborne polyurethane emulsion; the bottom coating material is prepared from raw materials in parts by weight as follows: 30-40 parts of gelatinized starch slurry, 10-15 parts of a polyvinyl alcohol solution and 20-30 parts of compound heavy calcium carbonate. The prepared kraft paper has relatively high binding strength and is high in picking speed and high in surface strength, the phenomena of coating shedding and peeling and the like are unlikely to occur, and the floating phenomenon is not prone to occur after printing due to high whiteness.

Description

technical field [0001] The invention relates to a kraft cardboard, which belongs to the technical field of papermaking. Background technique [0002] Kraft cardboard not only has the strength of ordinary kraft paper, but also has the printing adaptability of coated paper. Under the same packaging requirements, compared with traditional paper packaging methods, it can save more than 1 / 3 of paper, especially in frozen, vegetable and high-strength requirements. Packaging has broad application prospects and can replace a large number of existing packages. It has broad prospects in the current domestic packaging paper market. [0003] Kraft cardboard is used as the outer packaging of some high-end items. In order to obtain good printing patterns, in recent years there has been a process of pigment coating on the surface of natural color or white liner kraft cardboard. By improving the smoothness and porosity of the paper, the paper can be improved. The purpose of surface ink abs...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/10D21H19/82D21H19/64D21H19/60D21H19/44
CPCD21H27/10D21H19/44D21H19/60D21H19/64D21H19/82
Inventor 吴兴旺薛焱璟许蘅
Owner 田秋珍
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