PVC pipe line supply, sea Widex (certified), PVC pipe line provided by Qingdao Rubber Material Co., Widex. Widex Qingdao Rubber Material Co., Ltd. (www.haihuidaxiangsu.com) is specialized in "PVC profiles, seals, ABS extrusion profiles, PVC raw material" of the enterprise, the company of "honesty, hard service" concept, for You provide the most quality products and services. Welcome to inquire! Contact: Zhao Shuang. PVC is substituted with a chlorine atom using a polymer material of polyethylene, one hydrogen atom. Structure of this material is as follows: [-CH2 -CHCl-] n. Carbon atoms arranged in a zigzag, are σ-bonded to all atoms. All carbon atoms are sp3 hybridized low green plastic tubing formulation PVC pipe line products, certain principles PVC plastic pipe for formula design. PVC macromolecular structure instability exists in the structure of the head structure, a branched chain, a double bond, allyl chloride, tert-chloride and the like, so that heat deformation resistance and poor aging drawbacks. Pretending to be crosslinked, the class can eliminate shortcomings. PVC conventional identification methods are generally grouped into the following three types of PVC pipe line price, namely: identification (1) combustion method: softening or melting temperature range: 75 ~ 90 ° C; combustion conditions: self-extinguishing after ignition; combustion flame status: yellow Under the green smoke; away from the fire situation: from the fire goes out; Odor: pungent smell. This method is the most convenient and direct, generally the first choice. (2) solvent treatment Identification: Solvent: tetrahydrofuran, cyclohexanone, methyl ketone, dimethyl formamide; non-solvent: methanol, acetone PVC pipe line, heptane. PVC plastic is added by the suspected above solvent, dissolution was observed to determine whether the plastic PVC. After the solvent is heated to dissolve the effect will be more pronounced. (3) the proportion method: PVC specific gravity of 1.35 to 1.45, usually about 1.38. By gravity method for determining the proportion of the difference or distinction between PVC and other plastics.