Coloring process of whole body of fiber cement external wall panel

Abstract

The invention discloses a coloring process of the whole body of a fiber cement external wall panel, comprising the following steps of: (1) doping blended inorganic pigments into the raw material powder for producing the fiber cement external wall panel, enabling the blended inorganic pigments to be absorbed on the surfaces of other granules through high-speed stirring to achieve the purpose of sufficient dispersion, and then stirring by adding water; (2) carrying out kneading and mixing processes on raw materials, and then enabling the raw materials to enter an extruder for extrusion molding;(3) carrying out steam ordinary-pressure curing and autoclave curing on a product in a still kettle to accelerate and enhance the strength of the product; and (4) finally processing the surface of the product, and spraying colorless clearwater paint. The invention enables the whole body of the fiber cement external wall panel to have one color, fresh and lovely luster and elegant appearance and endure high temperature without color fading by adding the inorganic pigments to the fiber cement external wall panel and adopting a customized production and curing process, thereby solving the problems of easy ageing, color fading and stripping of a surface coating of the traditional external wall panel colored by using paint.

Description

technical field [0001] The invention relates to a whole-body coloring process of a fiber cement exterior wall board. Background technique [0002] Fiber cement exterior wall panels need to be colored during the production process. The current treatment is usually through paint coloring. Since the paint is an organic matter, its durability is poor, and the exterior wall panels are prone to surface coating aging after a long time of use. , fading and peeling issues. Moreover, the service life of fiber cement exterior wall panels is 50 years, while the service life of ordinary coatings is only 8-10 years, and the service life of high-grade coatings is no more than 20 years. In the service life of fiber cement exterior wall panels, at least 3 -5 times of repainting, resulting in high maintenance costs in the later period. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a whole-body coloring process for fiber cement...

AI Technical Summary

Problems solved by technology

[0002] Fiber cement exterior wall panels need to be colored during the production process. The current treatment is usually through paint coloring. Since the paint is an organic matter, its durability is poor, and the exterior wall panels are prone to surface coating aging after a long time of use. , fading and peeling issues

Moreover, the service life of fiber cement exterior wall panels is 50 years, while the service life of ordinary coatings is only 8-10 years, and the service life of high-grade coatings is no more than 20 years. In the service life of fiber cement exterior wall panels, at least 3 -5 times of repainting, resulting in high maintenance costs in the later period