A kind of composite stone flexible sheet and its preparation method

Abstract

The invention provides a method for preparing a composite stone flexible sheet and the composite stone flexible sheet prepared by the method. Firstly, real stone paints of different colors and effects are sprayed on the continuous composite mold belt through a multi-tip real stone paint spray gun. surface, and slowly dried in a low-temperature and low-air volume drying tunnel to form a stone sheet surface layer with a pattern / texture effect on the mold, and then coat the colored paste layer on the back of the surface layer, and press into the enhanced The tough base cloth is dried in a high-temperature and high-air-volume drying tunnel, demolded online, and cut into composite stone flexible sheets. This preparation method can realize continuous spraying and drying in the drying tunnel, without the need for a large number of molds, production is not affected by seasons, temperature and humidity, ensures product quality, reduces space occupation, and realizes continuous production; because it can be directly produced without demoulding The coating of the colored slurry layer saves the process and improves the efficiency; because the online cutting and forming is performed, the product yield is high, thereby overcoming the defects of the prior art.

Description

technical field [0001] The invention relates to the technical field of architectural coating, more specifically, to a method for preparing a composite stone flexible sheet and the composite stone flexible sheet prepared by the method. Background technique [0002] Due to the noble and elegant temperament and magnificent and changeable style of stone, it is widely used in the interior and exterior decoration of various buildings. For the destructive use of natural resources, various decorative materials with imitation stone effects emerge in endlessly. Among them, light weight, high weather resistance, and bendable stone-like flexible sheets are favored in the market. Based on the understanding of the performance effect of natural stone, using the real stone paint system and adopting a specific manufacturing process to imitate the effect of natural stone is the closest. It can prepare stone-like flexible sheets with stone texture, while other stone-like products prepared by ...

AI Technical Summary

Problems solved by technology

[0005] 2. Demoulding after drying: Since the real stone paint uses a low Tg emulsion, and the spraying process needs to contain a certain amount of water-retaining additives such as cellulose ether, a certain amount of film-forming additives such as Texanol, ethylene glycol Substances such as butyl ether have a slow surface drying speed, and accelerated drying will lead to increased porosity and discoloration of the system. The real stone paint finish sprayed on the surface of a single mold can only be placed in a low-temperature drying room through a drying rack. Dry slowly, after fully dry (moisture content ≤ 20%), release the real stone paint coating from the mold

[0008] It can be seen from the above description that the traditional composite stone flexible sheet has the following disadvantages, which is not conducive to large-scale production and has uncontrollable quality:

[0009] a. The real stone paint material on the surface has a certain amount of water-retaining substances and film-forming aids that cause slow drying. Although it provides a high degree of stone imitation, it is not conducive to drying, the drying cycle is long, and it is vulnerable to natural weather such as temperature / The effect of humidity, there is a huge difference in the quality of the finished product in summer / winter

[0010] b. Use a single mold for spraying, which consumes a lot of materials, the production equipment / environment cleaning pressure is high, and there is a large amount of industrial wastewater caused by cleaning equipment. At the same time, the drying room mode (shelf) is used to dry materials, which occupies a large area , the production volume is small, the demand for a single mold is large, the mold investment is high, and it can only be carried out in the mode of inventory production, which takes up a lot of funds and is not conducive to accepting orders

[0011] c. The composite stone flexible sheet formed by each mold needs to be cut into a size suitable for sale. The product yield is low, the loss is high, and it is easy to cause an increase in solid waste

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