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A kind of manufacturing method of lightweight paperless gypsum board

A technology of paper-faced gypsum board and its manufacturing method, which is applied in the field of gypsum board production, and can solve problems such as easy peeling off of face-protecting paper and weak bonding, and achieve the effects of superior product performance, light weight, and energy saving

Active Publication Date: 2020-10-02
山西大美至善石膏设备股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditionally produced paper-faced gypsum boards are poured and molded, which is prone to problems such as poor adhesion and easy peeling of the protective paper during molding.
However, in the current known technology, this technical problem has not been well overcome

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] First mix 70 parts of gypsum powder, 20 parts of cellulose, 5 parts of modified starch, 2 parts of retarder, 0.5 parts of water reducer, and 60 parts of water and mix them evenly, then add air to obtain slurry; The slurry is pumped into the molding machine to be pressed into gypsum boards; after the final setting of the pressed gypsum boards, the pieces are cut off and sent to the dryer for drying, dehydration, and then stacking, and the finished products are put into storage. The drying process requires strict control. If the drying process is not well controlled, it will cause deformation and affect the appearance and quality of the product.

Embodiment 2

[0029] First mix 90 parts of gypsum powder, 5 parts of cellulose, 15 parts of modified starch, 0.5 parts of retarder, 3 parts of water reducer, and 80 parts of water and stir evenly, then add air to obtain slurry; The slurry is pumped into the molding machine to be pressed into gypsum boards; after the final setting of the pressed gypsum boards, the pieces are cut off and sent to the dryer for drying, dehydration, and then stacking, and the finished products are put into storage.

Embodiment 3

[0031] First mix 85 parts of gypsum powder, 10 parts of cellulose, 10 parts of modified starch, 1 part of retarder, 1.5 parts of water reducer, and 75 parts of water and stir evenly, then add air to obtain slurry; The slurry is pumped into the molding machine to be pressed into gypsum boards; after the final setting of the pressed gypsum boards, the pieces are cut off and sent to the dryer for drying, dehydration, and then stacking, and the finished products are put into storage.

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PUM

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Abstract

The invention discloses a method for manufacturing a light gypsum board without a paper surface. Gypsum powder, cellulose, modified starch, retarder and a water-reducing agent at a certain mass ratio are taken as raw materials; after water is added into the raw materials and the raw materials are evenly mixed, air is added, and then the raw materials are sent into a forming machine to be formed to the gypsum board; and then the gypsum board formed by pressing is sent to a drying machine for drying and dehydration. The gypsum board without the paper surface, which is manufactured through the method, is light and high in strength, saves energy, reduces expenses, reduces costs and is superior in product performance.

Description

technical field [0001] The invention relates to the field of gypsum board production, in particular to a method for manufacturing a lightweight high-strength paper-free gypsum board. Background technique [0002] Gypsum board is a material made of building gypsum as the main raw material. It is a building material with light weight, high strength, thin thickness, convenient processing, sound insulation, heat insulation and fire resistance. It is one of the new lightweight panels that are currently being developed. Gypsum boards have been widely used in interior partition walls, wall cladding panels (replacing plastering layers), ceilings, sound-absorbing panels, ground floor panels and various Decorative panels, etc. [0003] At present, the traditional production of gypsum boards is made of building gypsum as the main raw material, mixed with appropriate additives and fiberboard cores, and processed with special protective paper as two layers of wrapping paper. Tradition...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/10C04B28/14
CPCC04B28/14C04B38/10C04B24/383C04B24/38C04B2103/22C04B2103/302
Inventor 殷越孙红芳殷彤
Owner 山西大美至善石膏设备股份有限公司