Henan Alu Industry Co., Ltd. is a professional pre coated aluminium roofing sheets manufacturer, using the color coating production line after pretreatment, roller coating, baking and other processes, on the surface of aluminum alloy with one or more layers of fluorocarbon/polyester paint, can also be coated with different patterns, so that the aluminum plate decoration effect is better.
Henan Alu Industry Co., Ltd. production of various types of pre coated aluminium roofing sheets , width up to 1850mm, thickness, weight and other specifications can be customized according to the project processing, manufacturers directly supply, low price, after-sales guarantee.
General pre coated aluminium roofing sheets The hardness tested with a pencil is only Hb, which can only be used for general decorative purposes.
For the project with complicated processing technology or easy contact with hard objects, it is easy to scratch or scratch the surface.Anti-scratch pre coated aluminium roofing sheets Adopt the particle anti-scratch coating curing process, the strength is more than 5 times of the ordinary pre coated aluminium roofing sheets , can resist the scratch of sharp objects.
Pre coated aluminium roofing sheets The production adopts the two-coating and two-drying production process.
In order to ensure the coating quality of the colored coating products, it is necessary to remove oil, dust and rust on the substrate surface before coating.
This is the first step to ensure the coating process and the basic work to ensure the quality of the colored coating board products.
The purpose of the treatment is to remove the anti-rust oil, rust spots and dust attached on the surface of the substrate, and to carry out chemical coating treatment on the clean surface of the substrate, in order to increase the adhesion of the substrate and coating, improve the corrosion resistance of the substrate and the durability of the coating.
Pre coated aluminium roofing sheets specifications
|Alloy||1100, 3003, 3005, 3104, 3105|
|Size||300*300, 300*600, 300*1200, 400*400, 500*500, 600*600, 600*1200mm|
|Thickness||0.5-5mm(0.2-1.0mm for coil, 1.0-6.0mm for sheet)|
|Surface Treatment||Powder coating, roll coating, Film covered|
|Edge||Beveled /Square Edge|
|Certificates||CE, SGS, ISO, etc.|
|Delivery Time||15-20 days after receiving the deposit and confirm the details|
|Payment||T/T, L/C, Western Union|
pre coated aluminium roofing sheets photos
pre coated aluminium roofing sheets Appearance Quality Inspection Method
According to the provisions of GB/T9761, the test is carried out under natural light conditions not exposed to direct sunlight. Randomly take at least two samples of the same batch (with a total area of not less than 1m2) and join them side by side in the same production direction, and visually inspect them 3m from the center of the assembled board. The consistency of the production direction of the sample should be maintained during the test.
Those who take and place samples will not participate in the visual test.
Monochrome products are evaluated for color difference in accordance with GB/T11186.2 and GB/T11186.3. Metal paint and anodized film are subject to visual observation.
Application of pre coated aluminium roofing sheets
It is widely used in homes, shopping malls, office buildings, hotels, schools, factories, banks, conference halls, gymnasiums, exhibitions, subways, airports and other public places.
|Item||Test Item||Standard||National standard||Test Result|
|1||Color Difference||ECCA T3||ΔE≤2.0||ΔE≤1.5|
|2||Gloss Difference||ECCA T2||≤10||≤5|
|3||Coating Thickness||ECCA T1||Two layers Min 23μm||≥25μm|
|Three layers Min 30μm||≥34μm|
|4||Pencil Hardness||ASTM D3363||≥HB||HB|
|6||Adhesion||ASTM D3359||Grade 0||Grade 0|
|8||Boiling water Resistance||GB/T17748||2h No change||4h No change|
|9||Solvent Resistance||ASTM D2248||200 times paints remaining||500 times no break|
|10||Acidity Resistance||ASTM D1308||5%HCL 24hrs No change||No change|
|11||Alkali Resistance||ASTM D1308||5%NaOH 24hrs No change color △E≤2.0||No change|
|12||Nitric acid Resistance||AAMA620||△E≤5.0||△E≤5.0|
|13||Oil Resistance||ASTM D1308||20#oil 24hrs No change||No change|
|14||Salt Spray Resistance||ASTM B117||4000hrs ≤Grade 1||No change|
|15||Abrasion resistance||ASTM D968||≥5L/μm||≥5L/μm|
|17||Color retaining||GB/T16259||4000 hrs△E≤4.0||4000 hrs △E≤3.0|
|18||Gloss weaken Level||4000 hrs ≤ Grade 2||4000 hrs ≤ Grade 2|
|19||Chalking||4000 hrs No change||4000 hrs No change|
Pre coated aluminium roofing sheets Light weight, beautiful appearance, good anti-corrosion performance, can be processed directly.
Generally divided into gray, blue and brick red color, mainly used in advertising, construction, home appliances, furniture and transportation industry.
Production process of pre coated aluminium roofing sheets
Aluminum sheet pre-roll coating process
Alu paints solid color, wooden grain, brushed, marble grain, chameleon etc thick sheet painting production line.
Pre coated aluminium roofing sheets Mortar Resistance Test Standard
- After mixing 75g of building quicklime powder conforming to JC/T 480 and fine sand in a ratio of 1:3, filter with a filter with a pore size of 0.84mm, add appropriate water to make a mortar, and apply it on the surface of the paint film.
Paint it to a size of 50mm×25mm and a thickness of about 13mm.
- After placing the sample in an environment of 38℃±3℃ and relative humidity of 95%±5% for 24 hours, remove the mortar and wipe off the residual dust with a damp cloth.
The residual ash that cannot be removed can be removed with a 10% hydrochloric acid solution, and visually inspect the appearance after drying.
- After the aluminum sheet is coated with fluorocarbon paint, various excellent properties such as high weather resistance, antistatic, anti-fading, high durability, preservative are added to make the aluminum plate more practical and durable.
Imitation copper, 3d wood grain effect, imitation wood grain, wooden, blue sky pattern, hemp pattern are well received by customers.
Henan Alu Industry Co., Ltd. focuses on the production of pre coated aluminium roofing sheets ,and provide export trade services.
Pre coated aluminium roofing sheets has high strength, fingerprint resistant, thermal insulation and corrosion protection, anti-fading, high strength, long life and other advantages.
We provide pre coated aluminium roofing sheets price information for you free, delivery time on time, low price, welcome to consult quotation!