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Magnesite hot press composite board

A composite board and magnesite technology, applied in lamination, lamination device, application, etc., can solve the problems of poor strength, rough production, high water absorption, etc., and achieve the effect of high strength and smooth surface

Active Publication Date: 2009-09-16
沈金良
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most of the anti-smoke and exhaust composite air ducts and air-conditioning air ducts used in the market are made of iron sheets and glass fiber reinforced plastics with foam, which are not only heavy, rough in production, large in air leakage, and the fire resistance of the foam cannot reach B1 level; aluminum foil is also used. Phenolic boards are used as smoke-proof and exhaust ducts, but they also have poor strength, high water absorption, and fire resistance cannot meet fire protection requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] (1) The finished centrifugal glass wool board is hot-pressed to a certain thickness by a machine and then set aside.

[0012] (2) Pour 10kg of magnesium chloride and 10kg of water into the container and dissolve for 12 hours, then add 0.5kg of foaming agent, 0.5kg of modifier, stir for 1 minute, then add 20kg of magnesium oxide and 20kg of quartz powder, stir evenly and set aside. The modifying agent is formulated according to the following components by weight percentage: 40% citric acid, 40% tartaric acid, 5% methyl cellulose, 6% NNO diffusing agent, and 9% alum; the foaming agent is formulated by weight percentage according to the following components Formulated: bone glue 3%, sodium hydroxide 46%, light soda ash 6%, rosin 30%, water 15%. The above chemical raw materials are all commercial products.

[0013] (3) Pour the prepared slurry into the sheet forming machine, add two layers of medium-alkali or non-alkali interwoven glass fiber reinforced cloth at a time, pu...

Embodiment 2

[0016] With embodiment 1, difference is: step (2) magnesium chloride 15kg, water 15kg are poured into the container and melted for 12 hours, then add foaming agent 0.5kg, modifying agent 0.5kg, stir 1 minute, then add 25kg oxidation Magnesium and 25kg quartz powder, stir evenly for later use.

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Abstract

The invention discloses a magnesite hot pressing composite board, belonging to the field of novel board materials. The magnesite hot pressing composite board is formed by a magnesite modified material as a gelled material, moderate-alkali or alkali-free interwoven grid glass-fiber fabric as a reinforcing material, and a centrifugal glass cotton plate clamped in the middle through a special process compounding machine, wherein the magnesite modified material is prepared by the following compositions in percentage by weight: 30 to 40 percent of magnesium oxide, 10 to 20 percent of magnesium chloride, 20 to 40 percent of quartz sand, 0.5 to 1 percent of a foaming agent, 0.5 to 1 percent of a modifying agent, and 10 to 20 percent of water. The material has the advantages of non combustion, environmental protection, energy conservation, light weight, high strength and the like; the board material has smooth surface, does not rust, mildew or dehylogenate, has service life of over 20 years, and is a perfect material for replacing an anti-exhaust pipe and a heating and ventilating pipe.

Description

technical field [0001] The invention belongs to the field of novel boards, and relates to a smoke prevention and exhaust composite air duct and an air-conditioning air duct, in particular to a magnesite hot-pressed composite board. Background technique [0002] At present, most of the anti-smoke and exhaust composite air ducts and air-conditioning air ducts used in the market are made of iron sheets and glass fiber reinforced plastics with foam, which are not only heavy, rough in production, large in air leakage, and the fire resistance of the foam cannot reach B1 level; aluminum foil is also used. Phenolic boards are used as smoke-proof and exhaust ducts, but they also have poor strength, high water absorption, and fire resistance cannot meet fire protection requirements. Contents of the invention [0003] In order to break through the shortcomings of traditional air duct panels, the purpose of this invention is to provide a new type of magnesite hot-pressed composite pan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B13/02B32B17/04B32B37/15C04B28/32C04B14/06
CPCC04B2111/28C04B28/32C04B2111/00017C04B2111/2038C04B14/06C04B14/42C04B14/46C04B22/148C04B24/06C04B24/22C04B24/383C04B38/10C04B22/062C04B22/10C04B24/14C04B24/34C04B2103/63
Inventor 沈金良
Owner 沈金良