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Preparation method of plasterboard and plasterboard

A paper-faced gypsum board and gypsum board technology, applied in the field of building materials, can solve problems such as untimely treatment, incomplete treatment, and long cleaning time, and achieve the effects of reducing impact, shortening final setting time, and reducing adhesion

Inactive Publication Date: 2020-01-03
BEIJING NEW BUILDING MATERIALS PLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the production of gypsum board, many reddish-brown particles are attached to the roller table for transporting the gypsum board, which will cause a large number of small pits on the surface of the gypsum board, with a diameter of about 1-2mm and a depth of about 0.5mm, which are densely packed. Commonly known as "hemp pit", the appearance of "hemp pit" means that although the paper-faced gypsum board has a certain strength when entering the dryer section, the strength is not high, so hard roller adhesions will form deep and shallow deposits on the surface of the gypsum board. Different dents. At present, when the surface of the gypsum board is uneven, the factory often stops production and manually cleans the roller table. This treatment method is not thorough and repetitive, and the problem is not dealt with in time, and the cleaning takes a long time. Difficult to clean and cause serious damage to the roller table

Method used

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  • Preparation method of plasterboard and plasterboard
  • Preparation method of plasterboard and plasterboard

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preparation example Construction

[0027] Optionally, the preparation method of the gypsum board slurry comprises:

[0028] Mix desulfurized gypsum clinker, modified starch, coagulant and functional additives, and stir to make a uniform mixed powder;

[0029] Mix foaming agent, compressed air and water, and stir to make foaming liquid;

[0030] The above mixed powder, foaming liquid and water are mixed and stirred to prepare the gypsum board slurry.

[0031] Optionally, the final setting time of the gypsum board slurry is 180s-220s.

[0032] Optionally, the desulfurized gypsum clinker, modified starch, coagulant and functional additives are stirred by a circular roller reamer to make a mixed powder.

[0033] Optionally, the coagulant is raw gypsum.

[0034] Compared with the prior art, the present invention adds raw gypsum coagulant according to the production situation, so that the final setting time of the gypsum board is 180s to 220s, so that the gypsum board can achieve complete final setting at the cutt...

Embodiment 1

[0042] A paper-faced gypsum board, said paper-faced gypsum board is made of the following components in parts by weight: 100 parts by weight of desulfurized gypsum clinker, 75 parts by weight of water, wherein 5 parts by weight of water is mixed with a foaming agent, and raw gypsum 1 part by weight, 1 part by weight of foaming agent, 0.8 part by weight of starch and 0.5 part by weight of water reducer, the specific surface area of ​​the raw gypsum is 24041cm 2 / g.

[0043] The preparation method of above-mentioned gypsum board comprises the steps:

[0044] Step 1. Mix 100 parts by weight of desulfurized gypsum clinker, 0.8 parts by weight of modified starch, 1 part by weight of raw gypsum and 0.5 parts by weight of functional additives, and stir to form a uniform mixed powder;

[0045] Step 2, mixing 1 part by weight of foaming agent, 5 parts by weight of water and compressed air, and stirring to make foaming liquid;

[0046] Step 3, mix the above-mentioned mixed powder, foa...

Embodiment 2

[0049]A paper-faced gypsum board, said paper-faced gypsum board is made of the following components in parts by weight: 80 parts by weight of desulfurized gypsum clinker, 62 parts by weight of water, wherein 4 parts by weight of water is mixed with a foaming agent, and raw gypsum 0.5 parts by weight, 1 part by weight of foaming agent, 0.5 parts by weight of starch and 0.5 parts by weight of water reducing agent, the specific surface area of ​​the raw gypsum is 24041cm 2 / g.

[0050] The preparation method of above-mentioned gypsum board comprises the steps:

[0051] Step 1. Mix 80 parts by weight of desulfurized gypsum clinker, 0.5 parts by weight of modified starch, 0.5 parts by weight of raw gypsum and 0.5 parts by weight of functional additives, and stir to form a uniform mixed powder;

[0052] Step 2, mixing 1 part by weight of foaming agent, 4 parts by weight of water, and compressed air with water, and stirring to make a foaming liquid;

[0053] Step 3, mix the above-m...

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Abstract

The application provides a preparation method of a plasterboard and the plasterboard. The preparation method comprises the steps: placing gypsum board slurry containing a coagulant on a conveying roller way, and sequentially carrying out a final setting stage, a cutting stage and a drying stage under the drive of the conveying roller way so as to finally set the gypsum board slurry before enteringthe cutting stage. The plasterboard comprises desulfurized gypsum clinker, water, a coagulant, a foaming agent, starch and a functional additive in parts by weight. By using the preparation method ofthe plasterboard, the final setting time of the gypsum slurry is greatly shortened, not only is the slurry disintegrating slag during board cutting reduced, but also the strength of a wet board whenthe wet board enters a drying machine is improved, and influences of disintegrating slag to the surface evenness of the board are reduced.

Description

technical field [0001] The application belongs to the technical field of building materials, in particular to a method for preparing a gypsum board with paper surface and the gypsum board with paper surface. Background technique [0002] In the production of gypsum board, many reddish-brown particles are attached to the roller table for transporting the gypsum board, which will cause a large number of small pits on the surface of the gypsum board, with a diameter of about 1-2mm and a depth of about 0.5mm, which are densely packed. Commonly known as "hemp pit", the appearance of "hemp pit" means that although the gypsum board has a certain strength when it enters the dryer section, the strength is not high, so the hard roller adhesion will form deep and shallow layers on the surface of the gypsum board. Different dents. At present, when the surface of the gypsum board is uneven, the factory often stops production and manually cleans the roller table. This treatment method is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B22/14B28B1/30
CPCB28B1/30C04B22/143C04B28/14C04B24/38C04B24/16C04B24/166C04B22/068C04B2103/302C04B2103/0068C04B2103/22C04B24/42C04B22/0013
Inventor 李帆陈红霞冉秀云肖文韬朱清玮
Owner BEIJING NEW BUILDING MATERIALS PLC
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