Aluminum: The curtain wall panel adopts other series of aluminum alloys whose material properties should meet the requirements of GB/T3880.2, 3××× series, 5××× series or better corrosion resistance and mechanical properties. The aluminum should be cleaned and chemically pretreated to remove oil, dirt and loose oxide layers naturally formed by contact with air and form a chemical conversion coating to facilitate aluminum and coating. Strong bonding of the core layer.
Coating: The fascia board coating material should be made of fluorocarbon resin with excellent weather resistance, and other materials with comparable or superior properties.
Note 1: At present, the most widely used polyvinylidene fluoride fluorocarbon resin (PVDF) with excellent weather resistance, but pure PVDF resin should not be directly coated on aluminum, but some other materials should be added to change its coating. The performance is the so-called 70% fluorocarbon resin.
Note 2: 70% fluorocarbon resin refers to 70% of the various raw materials used in the production of paint for aluminum-plastic panel coating. Since the paint also contains pigments and other components and a fluorocarbon resin coating usually has a non-fluorocarbon resin primer, the final content of PVDF in the total coating of the aluminum composite panel is about 25% to 45%.
Core material: The material properties of raw materials used for ordinary curtain wall core materials should meet the requirements of GB11115, GB11116, GB/T15182 or other corresponding national or industry standards.
Note 1: The quality of the core material is closely related to the quality of the aluminum composite panel. Inferior waste plastics often contain a lot of harmful impurities and severely aged plastics, which is extremely unfavorable for the quality of aluminum-plastic panels.
Note 2: Polyvinyl chloride is generally considered to be unsuitable for use as a core material because it is easily decomposed at high temperatures to produce strong toxic and corrosive substances.
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