Vinilplast - PVC product processing, containing the following supplements:1) mainly heat stabilizers - acceptors HCl (compound Pb, Sn, oxide and salts of alkaline earth metals), and sometimes epoxidized oils, organic phosphites;phenolic antioxidants such as;light stabilizers (benzotriazole derivatives, coumarins, benzophenones, salicylic acid, carbon black, TiO2, etc..);2) lubricant (paraffin, wax, etc..introduced to improve the fluidity of the melt);3) pigments or dyes;4) mineral fillers;5) elastomer (for example, a copolymer of acrylonitrile-butadiene-styrene and ethylene-vinyl acetate of 10-15% by weight;to improve toughness).The composition is thoroughly mixed in a blender and processed in an extruder or on a mill.Vinyl plastic manufactured in the form of sheets, plates, tubes, rods, molded-core materials, as well as pellets from which the extrusion or injection molding the form of various products.Vinyl plastic can be easily machined, welded and glued together.It is used as a structural material for corrosion-resistant chemical equipment and communications, ventilation ducts, pipes, fittings, as well as for flooring, wall coverings, and insulation (penopolivinilhlorid), making baseboards, window frames and other building details.Of clear vinyl plastic bulk containers are made for pisch.products, bottles, etc..
Basic properties of vinyl plastic.
Density:1,35-1,43 g./ Cm3.
Compressive Strength:60-160 MPa.
static bending strength:70-120 MPa.
Brinell hardness:110-160 MPa.
Tensile Modulus:2600-4000 MPa.
Specific impact strength for plates with a thickness of 4 mm notched:7-15 kg / cm • cm2.
Thermal:0,16-0,19 W / (m • K).
Specific heat:1,05-2,14 kJ / (kg • K).
Coefficient of thermal expansion:(50-80) • 10-6 ° C-1.
Volume resistivity at 20 ° C:1014-1015 ohms • cm.
Dissipation factor at 50 Hz:0,01-0,02.
Permittivity at 50 Hz:3,1-3,5.
Electrical strength at 20 ° C:15-35 MW / m.
Water absorption for 24 h at 20 ° C:not more than 0.1%.
The disadvantages of vinyl plastic, are low impact strength, a little frost (-10 ° C) and low operating temperature (not above 70-80 ° C).Used in the manufacture of sheets, tubes and profile products, plates.The recipe includes a polymer stabilizers, lubricants, colorants (pigments), fillers.To increase the strength of the modifier udaronoy toughness.Processed into a wide range of products by extrusion, rolling and calendering or pressing (in the form of dry mix), and injection molding (in the form of pre-cooked grains).