A paper-based gypsum board with high strength and low absorption

A low-absorption, gypsum board technology, applied in paper/cardboard layered products, papermaking, textiles and papermaking, etc., can solve problems affecting the normal use and aesthetics of paper-faced gypsum board walls, and the decrease in flexural strength and impact strength. , plate strength reduction and other problems, to achieve the effect of facilitating secondary modification treatment, increasing strength, and improving structure

Active Publication Date: 2020-06-12
湖南腾飞普天声学建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flexural strength and impact strength of the paper-faced gypsum board mainly depend on the strength of the protective layer composed of tough paper, and the protective layer composed of tough paper has strong hygroscopicity. Once it is wet, its flexural strength and impact strength It will be greatly reduced, which will cause the strength of the board to be greatly reduced, and even serious deformation will affect the normal use and appearance of the plasterboard wall.

Method used

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  • A paper-based gypsum board with high strength and low absorption
  • A paper-based gypsum board with high strength and low absorption

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A high-strength and low-absorbency paper gypsum board, which is made of a composite of an intermediate base layer and an outer face-protecting paper, the intermediate base layer is a gypsum board layer; the face-protecting paper is made of the following components in parts by weight Components: waste newspaper 80, fiber modified bentonite 25, cellulase 0.15, calcium carbonate 3.7, water 95.

[0021] Further, the preparation method of the fiber modified bentonite is:

[0022] (1) Stir and soak the bentonite with 5.5% sodium hydroxide solution at 40°C for 30 minutes, then add dropwise nitric acid solution with a mass fraction of 6%, until the pH of the mixed system reaches neutral, and then carry out Suction filtration, drying;

[0023] (2) Soak the glass fibers in a 10% sodium hydroxide solution at 64°C for 1 hour, then filter, wash with deionized water, and dry to constant weight;

[0024] (3) Put the bentonite after the above treatment into the cetyltrimethylammonium...

Embodiment 2

[0034] A high-strength and low-absorbency paper gypsum board, which is made by compounding an intermediate base layer and an outer face-protecting paper, the intermediate base layer is a gypsum board layer; the face-protecting paper is made of the following components in parts by weight Composition: waste newspaper 85, fiber modified bentonite 28, cellulase 0.19, calcium carbonate 4.2, water 98.

[0035] Further, the preparation method of the fiber modified bentonite is:

[0036] (1) Stir and soak the bentonite with 5.5% sodium hydroxide solution at 40°C for 30 minutes, then add dropwise nitric acid solution with a mass fraction of 6%, until the pH of the mixed system reaches neutral, and then carry out Suction filtration, drying;

[0037] (2) Soak the glass fibers in 10% sodium hydroxide solution at 64°C for 1 hour, then filter, wash with deionized water, and dry to constant weight;

[0038] (3) Put the bentonite after the above treatment into the cetyltrimethylammonium bro...

Embodiment 3

[0048] A high-strength and low-absorbency paper gypsum board, which is made of a composite of an intermediate base layer and an outer face-protecting paper, the intermediate base layer is a gypsum board layer; the face-protecting paper is made of the following components in parts by weight Composition: waste newspaper 82, fiber modified bentonite 26, cellulase 0.17, calcium carbonate 3.9, water 97.

[0049] Further, the preparation method of the fiber modified bentonite is:

[0050] (1) Stir and soak the bentonite with 5.5% sodium hydroxide solution at 40°C for 30 minutes, then add dropwise nitric acid solution with a mass fraction of 6%, until the pH of the mixed system reaches neutral, and then carry out Suction filtration, drying;

[0051] (2) Soak the glass fibers in a 10% sodium hydroxide solution at 64°C for 1 hour, then filter, wash with deionized water, and dry to constant weight;

[0052] (3) Put the bentonite after the above treatment into the cetyltrimethylammoniu...

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Abstract

The invention discloses a paper gypsum board with high strength and low absorbability, and relates to the technical field of gypsum material. The paper gypsum board is prepared by compositing of an intermediate base layer and surface protective paper at the outer side. The intermediate base layer is a gypsum board layer. The prepared light-weight high-strength gypsum board has excellent strength and low water absorption.

Description

technical field [0001] The invention belongs to the technical field of gypsum materials, in particular to a paper gypsum board with high strength and low absorption. Background technique [0002] Gypsum board is the most commonly used building material. It has the advantages of light weight, sound insulation, heat insulation, strong processing performance, and simple construction methods. It is widely used in industrial and civil buildings, especially as indoor and outdoor decoration materials, such as suspended ceilings. , Partition walls and other materials. The structure of the paper-faced gypsum board mainly used in the commonly used gypsum boards at present includes: an intermediate matrix layer composed of gypsum gelling material, and a protective layer composed of tough paper is arranged on the outer side of the intermediate matrix layer. The flexural strength and impact strength of the paper-faced gypsum board mainly depend on the strength of the protective layer co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B9/00B32B9/06B32B29/00D21H17/69D21H17/67D21H21/14
CPCB32B9/00B32B9/06B32B29/00B32B2307/7265B32B2601/00D21H17/675D21H17/69D21H21/14
Inventor 徐小培
Owner 湖南腾飞普天声学建材科技有限公司
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