The content of plasticizer in PVC

According to different uses, PVC plastics are often divided into: non-plasticized PVC, with a plasticizer content of 0; rigid PVC, with a plasticizer content of less than 10%; semi-rigid PVC, with a plasticizer content of 10-30% ; Soft PVC, plasticizer content is 30-70%; PVC paste plastic, plasticizer content is more than 80%. 　　

Export PVC plasticizer content: As early as December 7, 1999, the EU promulgated a temporary ban 1999/815/EC (2004/178/EC extended the temporary ban for the ninth time), prohibiting children under three years of age from entering Six kinds of phthalates (DINP, DEHP, DNDP, BBP, DBP) are used in soft PVC toys in the mouth, and their content cannot exceed 0.1% of the total weight.

The main function of the plasticizer and PVC is to reduce the melting temperature and melt viscosity of the polymer, thereby reducing its molding processing temperature; making the polymer products have flexibility, elasticity and low temperature resistance. In short, the main purpose is to improve the required physical properties. The type of plasticizer and its concentration (that is, content) are the two main factors that affect these properties.