Plastic steel doors and windows are made of polychlorohexene (UPVC) resin as the main raw material, plus a certain proportion of stabilizers, colorants, fillers, UV absorbers, etc., after extrusion molding, and then through cutting, welding or screwing The method is made into a door and window frame fan, which is equipped with a sealing strip, a top strip, a hardware, etc., and at the same time, to strengthen the rigidity of the profile, a steel lining (reinforcing rib) needs to be added in the cavity of the profile exceeding a certain length, so that the portal is made The window is called a plastic steel door and window.
fertilizer,High Quality fertilizer,fertilizer Details, Jinzhou Lvzhiyuan Fertilizer Factory
Chemicals ,Fertilizer Co., Lt d , http://www.nbfertilizer.com