PVC material is a kind of plastic decoration material. It is the abbreviation of polyvinyl chloride material. PVC resin is a thermoplastic polymer made by polymerization of vinyl chloride monomer. It uses polyvinyl chloride resin as the main raw material and adds an appropriate amount of anti-aging Reagents, modifiers, etc., are formed by mixing, calendering, and vacuum forming. PVC is an amorphous polymer containing microcrystals with a crystallinity of 5%-10% (melting point 175 degrees). The physical properties such as the molecular weight, crystallinity, and softening point of PVC vary with the polymerization reaction conditions.
PVC pipe manufacturers use PVC resin as the base material, mixed with stabilizers, plasticizers, fillers, colorants and modifiers and other additives to form PVC resin plastics through plasticization and molding. PVC material has the characteristics of light weight, heat insulation, heat preservation, moisture-proof, flame-retardant, and easy construction. There are many specifications, colors, patterns and rich decorations, which are widely used in production and daily life.
Such as PVC water pipes, PVC plastic doors and windows, and plastic toys containing PVC, wires and cables. Because it is harmful to the human body, countries such as Europe, Japan and South Korea have imposed restrictions on products using PVC as raw materials. The outstanding advantages of general PVC resin plastic products are flame retardancy, wear resistance, chemical corrosion resistance, and low gas and water vapor leakage.
In addition, comprehensive mechanical energy, product transparency, electrical insulation, heat insulation, noise reduction, and vibration absorption are also good, and it is a general-purpose material with the most superior price ratio. The disadvantage is poor thermal stability and impact resistance, and it is easy to be brittle during the use of hard or soft PVC. Generally, PVC contains bis(2-ethylhexyl) adipate (DEHA) plasticizer, which is not allowed by the relevant national standards. DEHA is easily released at high temperatures (over 100 degrees Celsius), which is harmful to health after contacting the human body.
Because PVC is a kind of hard plastic, to make it soft, a large amount of plasticizer must be added. The plasticizer is easily released in a heated environment.