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Manufacturing method of glass fiber reinforced gypsum (GRG) board

A technology of glass fiber and manufacturing method, which is applied in the field of manufacturing glass fiber reinforced gypsum board, which can solve the problems of increasing the water absorption rate of gypsum, increasing the void channel, and affecting the quality of the board, so as to improve the bonding interface, improve water resistance, and increase the strength of the board Effect

Active Publication Date: 2013-09-18
前海坤德投资控股(深圳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this method is that the mixed slurry is difficult to mix and stir evenly, and the distribution of chopped strands is uneven, which affects the quality of the board and also limits the amount of chopped strands added.
In addition, whether it is laying long strands or spraying chopped strands, it is completed sequentially or nearly simultaneously with the spraying of gypsum slurry within a short period of time during the casting operation. It is impossible to ensure that these glass fibers are in good contact with gypsum. The existence of fibers with poor interface contact will increase the void channels in the gypsum body after hardening, increase the water absorption rate of gypsum, and reduce the moisture-proof performance of gypsum; at the same time, the existence of pores is not conducive to the enhancement of the strength of the entire GRG board
Third, in this way, it is impossible to precisely control the weight of the added glass fiber chopped strands

Method used

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  • Manufacturing method of glass fiber reinforced gypsum (GRG) board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method of manufacturing glass fiber reinforced gypsum board, comprising the following steps:

[0024] In step (1), 100 parts of high-strength gypsum powder, 0.2 part of water reducer, 0.1 part of retarder, and 30 parts of water are added to a stirring device by weight and mixed evenly to prepare a gypsum slurry.

[0025] In step (2), the glass fiber is cut into 10 mm long glass fiber chopped strands with a shearing device.

[0026] Step (3), use the atomizing device to spray the gypsum slurry into the mixing tank, and at the same time use the spraying device to spray the glass fiber chopped strands into the mixing tank to form the final material; control the outlet pressure of the atomizing device to be slightly higher than that of the spraying device The pressure is 0.01MPa, and the outlet of the gypsum slurry of the atomization device is 10cm higher than the outlet of the glass fiber chopped strands of the injection device. For different atomizing devices and injec...

Embodiment 2

[0031] A method of manufacturing glass fiber reinforced gypsum board, comprising the following steps:

[0032] In step (1), 100 parts of high-strength gypsum powder, 0.6 parts of water reducer, 0.6 parts of retarder, and 40 parts of water are added to a stirring device by weight and mixed evenly to prepare a gypsum slurry.

[0033] In step (2), the glass fiber is cut into 60mm long glass fiber chopped strands with a shearing device.

[0034] In step (3), the gypsum slurry is sprayed into the mixing tank with an atomizing device, and at the same time, the glass fiber chopped strands are sprayed into the mixing tank with a spraying device, and 0.5 parts by weight of silane coupling agent are added to form the final material; control The pressure of the atomizing device is slightly higher than the pressure of the spraying device by 0.01MPa, and the outlet of the gypsum slurry of the atomizing device is 10cm higher than the outlet of the glass fiber chopped strands of the spraying...

Embodiment 3

[0039] A method of manufacturing glass fiber reinforced gypsum board, comprising the following steps:

[0040] In step (1), 100 parts of high-strength gypsum powder, 0.3 part of water reducer, 0.4 part of retarder, and 33 parts of water are added to a stirring device by weight and mixed evenly to prepare a gypsum slurry.

[0041] In step (2), the glass fiber is cut into 50 mm long glass fiber chopped strands with a shearing device.

[0042] In step (3), the gypsum slurry is sprayed into the mixing tank with an atomizing device, and at the same time, the glass fiber chopped strands are sprayed into the mixing tank with a spraying device, and 0.1 part by weight of silane coupling agent is added to form the final material; control The pressure of the atomizing device is slightly higher than the pressure of the spraying device by 0.01MPa, and the outlet of the gypsum slurry of the atomizing device is 10cm higher than the outlet of the glass fiber chopped strands of the spraying de...

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Abstract

The invention discloses a manufacturing method of a glass fiber reinforced gypsum (GRG) board. Gypsum slurry and glass fiber chopped strands are injected into a mixing drum at the same time, and final slurry can be evenly mixed without being stirred; the final slurry can be directly sprayed onto the small parts of the GRG board, and the weight ratio between the chopped strands and the gypsum slurry which are added for forming a final material can be accurately controlled, so that the strength of the GRG board can be improved; furthermore, in the mixing drum, the glass fiber chopped strands are pressed by the gypsum slurry, and the stirring is carried out, so that the contact effect of the gypsum slurry and the chopped strands can be improved, internal gaps can be reduced after hardening, and the water absorption of the GRG board is reduced.

Description

technical field [0001] The invention relates to a manufacturing method of glass fiber reinforced gypsum board. Background technique [0002] GRG (Glass-fiber Reinforced Gypsum, glass fiber reinforced gypsum) is a special modified fiber gypsum decorative material. The randomness of the shape makes it the first choice for architects who require individualization. Its unique material composition makes it stronger. To resist damage, deformation and cracking caused by the external environment. Its shape selection is rich and arbitrary, and GRG products that can adopt pre-casting processing technology can customize any artistic shape such as single curved surface, hyperboloid surface, three-dimensional cladding, hollow pattern, relief pattern, etc., to give full play to the design. It has the advantages of high strength, light weight, no deformation, no cracking, and good sound wave reflection performance. [0003] In the prior art, in a kind of GRG plate manufacturing method, l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B14/42
Inventor 刘年新尚发明
Owner 前海坤德投资控股(深圳)有限公司
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