pvc material processing a pigment in certain metal ions will lead to PVC resin thermal oxidative decomposition. Determination method pigmented polyethylene was heated to 180 ℃ when the change of hue. Since the pigment contained in the metal ions to promote accelerated decomposition of PVC, resulting in change of hue. At the same time, but also note that the PVC plastic pipe fittings, color also joined Lake Red PVC can produce different, such as calcium, the color difference is small; manganese big difference is the color of PVC plastic pipe outlets, which is due to manganese and other metals promote PVC dehydrochlorination due. Sulfide-based colorant (such as cadmium red, yellow, etc.) used in PVC coloring, coloring agents may be due to the decomposition of hydrogen sulfide release. Such colorants should not be mixed with lead stabilizers in order to avoid generating the black lead sulfide. 2, pigments, PVC electrical insulation impact as PVC and polyethylene plastics like PVC pipe cable material, you should consider the electrical properties of the colored. Especially for its own PVC insulation resistance than polyethylene is poor, so the impact is even greater pigment. Instructions to select an inorganic pigment-colored good PVC PVC PVC hard and sheet were added to its electrical insulation properties than the organic pigment is a stabilizer, a lubricant and a filler PVC plastic tube processing, after kneading, extruding with an extruder can each kind of hard tube diameter, shaped tubes, bellows, used for water pipes, water pipes, wire casing or stair handrail. Good hot rolled sheet will overlap, can be made of rigid plates of various thickness. Sheet can be cut into the desired shape, then use hot air welding PVC welding rod into a variety of chemical-resistant tanks, ducts and vessels. Generally soft PVC products can be extruded by an extruder hoses, cables, wires, etc; the use of an injection molding machine with a variety of mold can be made of plastic sandals, shoes, slippers, toys, automotive accessories. PVC plastic pipe processing, PVC plastic pipe fittings, sea Widex Widex provided by Qingdao Rubber Material Co., Widex Qingdao Rubber Material Co., Ltd. (www.haihuidaxiangsu.com) strong, credible, in Qingdao, Shandong industrial products industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the sea Widex and you work into the brilliant, for a better future!