Sky Rainbow is committed the environment as responsibility and refused to use inferior materials to save costs, We have strict control of heavy metal’ content in raw materials, and adopted firstly the latest EU standard and pass the ROSH certification that ensure the final product have no harm to human body and environment.

For aluminium alloy, we use the China Southwest alloy (also the supplier for China areoplane equipment company)  which have good tensile strength and T-Bend peculiarity, perfect flatness, has reach the highest  international standard.

For Paints, we use BECKER, PPG, FULLSUN, JINCHAOYANG company, in base of  HYLR5000 & KYNAR500 standard,  it has best quality in pollution resistance and weather resistance. the products can keep good appearance whatever extremely hot or frigid weather. even in heavy polluted area, just use the neutral detergent can keep the panel in new appearance.

For PE core, we use the Low Density Polyethylene (LDPE) core from Qilu Petrolchemical(QPEC). The way of production is By high-pressure process (147.17-196.2MPa), low degree of cystallinity (in 45%-65%), small density(0.910-0.925). soft light, anti-impacting and anti-lower temperature properties.

The parent company of Liyuan Group is supply the adhesive film for production. Liyuan has cooperated with Dupont more than 12 years history. It is the first company developed this material .It is an industry leap from glue connection materials to high polymer materials.