Huawei has rich experience in the manufacture and export of roof aluminum sheets, and 3003 aluminum sheets are commonly used. The thickness of the aluminium roofing sheet is 0.18-1.6mm and the width is 580-1850mm, the surface of the roof aluminum sheet can be pure or color coated, we Huawei can ensure the quality of the aluminum roof sheet, and at the same time provide the factory price.
The exterior surface treatment of aluminum roof panels includes two categories of natural unpainted and painted products:
1. Unpainted products: Hammered coated aluminium roofing sheets (irregular patterns), embossed aluminum panels (form regular patterns by mechanical embossing); pre-passivated alumina surface treatment panels. This aluminum roof panel product is not painted on the surface of the aluminum panel, does not require high surface appearance, and is cheap.
2. Coating products: According to the coating process, it is divided into: powder coated aluminum sheet products and pre-coated coated aluminum sheets;
According to the type of coating, it can be divided into: polyester, polyurethane, polyamide, modified silicone, epoxy resin, fluorocarbon, etc. , as far as possible to extend the anti-aging ability of coatings under the action of sunlight and ultraviolet rays, among which PVDF coatings (fluorocarbon coatings) have the best anti-aging properties. It is the most UV-resistant organic compound known so far. Fluorocarbon aluminum plate for roof, according to different quality requirements, adopts horizontal automatic two-coating two-bake, three-coat three-bake, four-coat four-bake roller coating process. The pre-applied PVDF coating has a resin content of 70% to 80%. It is rolled on a high-speed continuous unit through chemical pretreatment, primary coating, fine coating and other processes. The front coating is generally 25μm, and the back is coated with anti-rust paint.