The main health problems: PVC itself is non-toxic,, But its greater toxicity of monomers and degradation products.The High level of plasticizes in the PVC.
The toxicity of VC monomer and degradation products: PVC resins and molding materials usually contain a certain amount of VC monomer. It can migrate to the food if contact with food. Vinyl chloride absorption by the gastrointestinal tract. Part of the discharge through the respiratory tract, Another part broken down into ethanol and chloro-acetic acid chloride. It can be binding with deoxyribonucleic acid (DNA) in the body. The toxicity resulting mainly on the nervous system, bone and liver.
The results show that Vinyl chloride monomer and its decomposition products have a carcinogenic effect. There have a report of human angiosarcoma of the epidemiological survey. Therefore, the countries for PVC resin, vinyl chloride monomer residue have made provision. Such as Japan, the United States, Britain, France, the Netherlands, Italy, Switzerland and etc. They provisions of residual vinyl chloride monomer is less than 1mg/kg. France, Italy, Switzerland, also provisions that the amount of food should not be moved more than 0.05mg/kg. China GB4803-94 “food containers, packing materials, PVC resin sanitary standards" and GB9681-88 "PVC moldings food packaging hygiene standards," the provisions that: Food packaging of PVC resin and molding products in vinyl chloride monomer content should be controlled at 5mg/kg respectively, and 1mg / 1 below.
The migration of plasticizers: PVC moldings to be used in a large number of plasticizers. In particular, semi-rigid and soft PVC. Some of the plasticizer’s toxic is larger. The production of PVC also add stabilizer and UV absorber additive. These additives will also migrate to the food. We must highly attention.the toxic of additives to add. Should conform to GB9685-94 "food containers, packaging materials, use of health auxiliaries standard" requirements.