Film-coated aluminum alloy template and preparation method thereof

Abstract

The invention relates to a laminating aluminum alloy template. The laminating aluminum alloy template comprises an aluminum alloy substrate and a polyurea laminating layer that covers the surface of the aluminum alloy substrate, wherein the polyurea laminating layer comprises the following components in parts by weight: 92 to 100 parts of polyurea resin, 0 to 4 parts of polyether modified siliconeoil, 0 to 1 part of dimethyl silicone oil and an organic solvent. The polyurea resin plays roles in being resistant to alkali and abrasion and being tightly adhered with the aluminum alloy substrate,the polyether modified silicone oil plays main roles in improving the appearance of concrete and demoulding, the dimethyl silicone oil plays auxiliary roles in improving the appearance of concrete and demolding, and the organic solvent plays a role in controlling the thickness and viscosity of the polyurea laminating layer. Bubbles and waterlines for the appearance of concrete after demolding canbe reduced, the demolding effect of concrete is improved, the mold sticking phenomenon of concrete is solved, and the appearance quality of concrete is greatly improved.

Description

technical field [0001] The invention relates to an aluminum alloy formwork, in particular to a film-coated aluminum alloy formwork and a preparation method thereof which is beneficial to improving the demoulding effect of the aluminum alloy formwork. Background technique [0002] The aluminum alloy formwork system is a new type of formwork system. The self-weight of the aluminum formwork is smaller than that of the steel formwork, and its bearing capacity is greater than that of the wood formwork. The surface of the poured concrete is smooth, the concrete is well formed, the service life is long, the number of turnovers is high, and the economic benefit is high. . Although the one-time investment of aluminum formwork is large, it has more turnover times and less loss. The overall comprehensive benefit is superior to that of wood formwork and steel formwork commonly used at present, so it will become the main form of construction industry formwork in the future. [0003] How...

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Problems solved by technology

[0003] However, while the aluminum alloy formwork brings a series of advantages, construction technicians have been troubled by the problem of concrete appearance quality and mold sticking during the demoulding process. The concrete appearance and demoulding effect of the aluminum alloy formwork are lower than those of the steel formwork construction. Invention People think that it has a certain relationship with the conductivity of the template material, which has become a bottleneck restricting the widespread promotion of aluminum alloy templates

In the prior art, a small number of new aluminum alloy formworks are covered with plastic film or baking varnish. After 3-5 molds are used for the aluminum alloy formwork covered with film or baking varnish, the appearance quality of the concrete (more air bubbles and water lines) will become worse and worse. Yes, in the later period, there was a relatively serious mold sticking phenomenon, especially during the construction of the roof. After the aluminum alloy formwork was coated with a release agent, the workers destroyed the release agent layer in the process of binding the steel bars, and the rust of the steel bars was stuck. and other dirt cannot be removed, resulting in rusty spots on the surface of the punched concrete, which seriously damages the appearance of the concrete. These problems seriously affect the quality acceptance of the project and increase the construction cost

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