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Manufacturing process of fiber cement board

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

Active Publication Date: 2020-09-22
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 of fiber cement board
  • Manufacturing process of fiber cement board
  • Manufacturing process of fiber cement board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0030] Example Manufacturing process of fiber cement board

[0031] Process One

[0032] First, use a mixer to dry-mix the wood fiber at a speed of 700 rpm and a dry mixing time of 10 seconds. Then add P·Ⅱ52.5 cement, 200 mesh quartz powder, polyacrylamide, 325 mesh talc, cellulose ether, The synthetic fiber continued to dry stirring, the continuous dry stirring speed was 700 rpm, the continuous dry stirring time was 20 seconds, and then water was added to wet stirring, the stirring time was 95 seconds, and the stirring speed was 600 rpm. The raw materials of fiber cement board were obtained, including polyacrylamide, The content of P·Ⅱ52.5 cement, 200 mesh quartz powder, polyacrylamide, 325 mesh talcum powder, cellulose ether, synthetic fiber and wood fiber are:

[0033]

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

[0035] Once again, a vacuum extruder is u...

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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 siding is mainly used in low-rise buildings, and high-density fiber cement exterior wall siding can be applied to both low-rise and high-rise residential buildings. High-density fiber cement siding has the advantages of higher strength and lower water absorption than medium and low-density fiber cement siding, and is currently widely used. Due to the high density of the high-density board, the weight of the completely solid board is relatively large. Therefore, the existing process is to perform hole...

Claims

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Application Information

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Patent Type & Authority Patents(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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