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Manufacturing process for fiber cement board

A technology of fiber cement board and manufacturing process, which is applied in the direction of building structure, construction, covering/lining, etc., which can solve the problems of unsatisfactory product qualification rate, reduced board strength, autoclaved cracks, etc., to reduce the probability of autoclaved cracks , increase the strength of the board, and the effect of light weight

Active Publication Date: 2018-10-16
BEIJING NEW BUILDING MATERIALS PLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the punching process, due to the effect of frictional resistance, the extruded sheet is often torn. In order to reduce this phenomenon, the current technology is to add some powder with lubricating properties, such as talcum powder, to the formula. Generally more than 30%, the dosage is high, which reduces the strength of the plate, and is prone to autoclaved cracks, and the product qualification rate is still not ideal

Method used

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  • Manufacturing process for fiber cement board
  • Manufacturing process for fiber cement board
  • Manufacturing process for fiber cement board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0030] Example Manufacturing process of fiber cement board

[0031] Craft one

[0032] First, dry-mix the wood fiber with a mixer, the dry mixing speed is 700rpm, and the dry mixing time is 10s, then add P·Ⅱ52.5 cement, 200 mesh quartz powder, polyacrylamide, 325 mesh talcum powder, cellulose ether, Synthetic fiber is continued to be dry-stirred, and the dry-stirring speed is 700rpm, and the dry-stirring time is 20s, and then wet stirring is added, and the stirring time is 95 seconds, and the stirring speed is 600rpm, and the raw materials of the fiber cement board are obtained, wherein polyacrylamide, The content of P·Ⅱ52.5 cement, 200 mesh quartz powder, polyacrylamide, 325 mesh talcum powder, cellulose ether, synthetic fiber and wood fiber is:

[0033]

[0034] Secondly, use a kneader to knead the raw materials of the fiber cement board, the kneading time is 180s, and the kneading speed is greater than or equal to 65rpm.

[0035] Thirdly, the fiber cement board protot...

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Abstract

The invention provides a manufacturing process for a fiber cement board. The manufacturing process includes the following mixing and stirring steps of adding water to polyacrylamide and conventional raw materials of the fiber cement board for mixing and stirring to prepare raw materials of the fiber cement board, wherein the content of the polyacrylamide is 1-10 wt%. Through a formula of the fibercement board, the lubrication performance of the fiber cement board can be improved, the wear resistance generated when holes are punched is reduced, so that the fiber cement board can withstand thehigher density of hole punching, and light weight makes the fiber cement board more suitable for characteristic requirements of the hanging boards.

Description

technical field [0001] The invention relates to a manufacturing process of a fiber cement board. Background technique [0002] As a new type of building energy-saving green material, fiber cement exterior wall siding is widely used in exterior wall facades. At present, fiber cement exterior wall siding is divided into medium and low density fiber cement exterior wall siding and high density fiber cement exterior wall hanging board. Medium and low-density fiber cement exterior wall panels are mainly used in low-rise buildings, while high-density fiber cement exterior wall panels can be used in both low-rise and high-rise buildings. High-density fiber cement siding has the advantages of high strength and low water absorption compared with medium and low-density fiber cement exterior wall siding, and is currently widely used. Due to the high density of the high-density board, if the completely solid board has a large weight, the existing process is to process the board when p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04E04F13/14C04B111/34
CPCC04B28/04C04B2111/343C04B2201/20C04B2201/50E04F13/141C04B24/2652C04B14/06C04B14/042C04B24/383C04B16/02C04B18/241C04B14/38C04B14/42C04B16/06
Inventor 梁宝伟
Owner BEIJING NEW BUILDING MATERIALS PLC
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