A method for producing coated linerboard or coated kraftboard at low cost and the coated linerboard or coated kraftboard produced by the method

A kraft cardboard, low-cost technology, applied in the field of pulp and papermaking, can solve the problems of whitening effect of raw pulp, reduced mechanical properties, high production cost, etc., to achieve the goal of increasing added value, reducing consumption, and reducing negative impact Effect

Inactive Publication Date: 2011-12-21
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production cost of the former method is relatively high, and the latter direct coating method generally requires at least 50g/m 2 The coating amount of about 10000000000000000000000000, the paper becomes brittle and the mechanical properties are reduc

Method used

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  • A method for producing coated linerboard or coated kraftboard at low cost and the coated linerboard or coated kraftboard produced by the method
  • A method for producing coated linerboard or coated kraftboard at low cost and the coated linerboard or coated kraftboard produced by the method
  • A method for producing coated linerboard or coated kraftboard at low cost and the coated linerboard or coated kraftboard produced by the method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] Example 1:

[0026] A low-cost method for producing coated cardboard or coated kraft cardboard, the steps are as follows:

[0027] (1) Using an application device, apply the primer coating at a basis weight of 141g / m 2 On the recycled cardboard paper with a whiteness of 15.8%, the primer coating includes: 60 parts kaolin (more than 90% less than 2 microns), 40 parts (55 grade) calcium carbonate, 7 parts styrene butadiene latex, 10 parts starch, others Coating additives include: dispersant (sodium polyacrylate), 0.2 part; defoamer (polyethylene glycol) 0.02 part; water repellent (polyamide polyurea resin), 0.5 part; lubricant (calcium stearate) , 0.5 copies.

[0028] The coating amount is 10±1g / m 2 , The solid content of the coating is 50-68% (the same below).

[0029] (2) Using an application device, apply the top coating to the primed recycled cardboard paper, where the top coating includes: 60 parts of fine-grained kaolin (more than 92% less than 2 microns), 40 parts of 95 g...

Example Embodiment

[0032] Example 2:

[0033] A low-cost method for producing coated cardboard or coated kraft cardboard, the steps are as follows:

[0034] (1) Using a coating device, apply the primer coating at a basis weight of 141g / m 2 On the recycled cardboard paper, the coating includes 60 parts of kaolin (more than 90% less than 2 microns), 40 parts of calcium carbonate (level 55), 7 parts of styrene butadiene latex, 10 parts of starch, and other commonly used coating additives such as: dispersion Agent, water repellent, defoamer, lubricant. The coating amount is 10±1g / m 2 .

[0035] (2) Using a coating device, apply the topcoat paint on the primed recycled cardboard paper, where the paint includes 60 parts of fine-grained kaolin (more than 92% less than 2 microns), 40 parts of 95 grade calcium carbonate, 12 Part of styrene butadiene latex, 1 part of polyvinyl alcohol (PVA, as OBA carrier), 0.6 part of 4S type optical brightener, other commonly used coating additives such as: dispersant, water...

Example Embodiment

[0037] Example 3:

[0038] A low-cost method for producing coated cardboard or coated kraft cardboard, the steps are as follows:

[0039] (1) Using a coating device, apply the primer at a basis weight of 141g / m 2 On the recycled cardboard paper, the coating includes 60 parts kaolin, 40 parts 55 grade calcium carbonate, 8 parts styrene butadiene latex, 6 parts starch, and other commonly used coating additives such as: dispersant, water repellent, defoamer, Lubricant. The coating amount is 10±1g / m 2 .

[0040] (2) Use a coating device to coat the top coat paint on the primed recycled cardboard paper, where the paint includes 60 parts of kaolin (more than 92% less than 2 microns), 40 parts of 95 grade calcium carbonate, 12 parts of butyl Benzene latex, 1 part of sodium carboxymethyl cellulose (CMC), 0.6 part of 4S type optical brightener, other commonly used paint additives such as: dispersant, water repellent, defoamer, lubricant. The coating amount is 17±1g / m 2 .

[0041] (3) After ...

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Abstract

The invention relates to a coated box board or coated kraft liner, in particular to a coated box board/kraft liner and a method for producing the same at low cost. The method comprises the steps of coating prime coat on the box board or unbleached kraft liner and coating top coat on the box board or unbleached kraft liner, wherein the primer coat comprises starch; and the top coat comprises an optical brightening agent. The coated box board or coated kraft liner and the method have the following beneficial effects: the prime coat and the top coat do not have mandatory requirements for the rawmaterials and different quality of pigments can be used in the coat of different coatings, thus further saving the production cost, and the coating weight each time is lower, thus not only being beneficial to drying but also being beneficial to improvement of the production efficiency.

Description

technical field [0001] The invention belongs to the field of pulping and papermaking, and relates to coated linerboard or kraftboard, in particular to a low-cost method for producing coated linerboard / kraftboard and the coated linerboard / kraftboard produced by the method. Background technique [0002] Beautifully printed high whiteness coated boxboard (also known as coated kraft cardboard) is more and more widely used in commodity packaging. At present, there are two main ways to produce first-class coated boxboard or coated kraftboard (national standard GB / T 10335.5-2008 whiteness higher than 76%): one is to make paper on the surface of natural-colored boxboard Hang a layer of quantitative 30-40g / m 2 The white pulp, and then coated; the other is no white pulp, directly coated on the natural color boxboard to a whiteness higher than 76%. The production cost of the former method is relatively high, and the latter direct coating method generally requires at least 50g / m 2 If...

Claims

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Application Information

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IPC IPC(8): D21H19/54D21H21/30D21H19/82
CPCD21H19/385D21H19/40D21H21/30D21H19/54D21H19/822D21H19/58
Inventor 臧永华许英李星龙李洒
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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