The difference between PVC and ordinary plastic is that the interior of the plastic contains chlorine elements, so it is not directly exposed to drinking water or food.
Secondly, because the PVC plastic molecular chain polarity is too large, plastic poor, so often need to add more than 40% plasticizer (plasticizing agent), often also can not directly contact drinking water or food.
Ordinary plastic, may refer to LDPE, human can be used directly, many human body and not too much harm. Polyvinyl chloride, in English abbreviation PVC, is the initiator of vinyl chloride monomer in peroxide, azo compound, or polymer formed by polymerization mechanism of free radical polymerization under the action of light and heat.
Vinyl chloride homopolymer and vinyl chloride copolymer are called vinyl chloride resins. PVC is a white powder with amorphous structure, the degree of small support, relative density of about 1.4, glass temperature 77~90℃,170℃ began to decompose, light and heat stability is poor, in 100 ℃ or over a prolonged period of sunlight exposure, will decompose and produce hydrogen chloride, and further automatic catalytic decomposition, causing discoloration, Physical mechanical properties are also rapidly declining, and in practical applications, stabilizers must be added to improve the stability of heat and light.