Our staff are usually in the spirit of 'continuous improvement and excellence', and while using the top-quality high-quality items, favorable value and superior after-sales services, we try to acquire each and every customer's belief for Oval Alunimum Finned Tube, Evaporator Coil, Copper Tube Condenser Cooling Coil. Owning to latest technologies, we facilitate our customers with customized production facility. As operation principle is 'be market-oriented, good faith as principle, win-win as objective', holding on 'customer first, quality assurance, service first' as our purpose, dedicated to provide the original quality and create excellence service. Our company will steadily expand, build an efficient enterprise management platform with the effective integration of resources. Our company has been adhering to: military management, school training, family relationship, strive to create excellent and personalized corporate culture brand and gradually form a high intelligent organization with core competitiveness of talents.
Polyvinyl chloride, English for short (Polyvinyl chloride), is an initiator of vinyl chloride monomer (VCM) in peroxides, Azov compounds, etc. Or under the action of light and heat according to the mechanism of free radical polymerization Polymerized polymer. Vinyl chloride homo-polymers and vinyl chloride co-polymers are collectively referred to as vinyl chloride resins.
PVC is an amorphous white powder with a small degree of branching, a relative density of about 1.4, a glass transition temperature of 77 ~ 90 ° C, and decomposition at about 170 ° C . Poor stability to light and heat, above 100 ° C or After prolonged sunlight exposure, it will decompose to produce hydrogen chloride, and further automatically catalyzes decomposition, causing discoloration, and physical and mechanical properties are also rapidly reduced. In practical applications, stabilizers must be added to improve the stability to heat and light.
The molecular weight of industrially produced PVC is generally in the range of 50,000 to 110,000. It has a large perversity, and the molecular weight increases with the decrease of the polymerization temperature. Without a fixed melting point, it begins to soften at 80 to 85 ° C and becomes viscosity at 130 ° C. , 160 ~ 180 ℃ began to change to viscous flow state; has good mechanical properties, tensile strength of about 60MPa, impact strength of 5 ~ 10kJ / m2; has excellent dielectric properties.
PVC was once the world's largest general-purpose plastic, and it is widely used. It is widely used in building materials, industrial products, daily necessities, floor leather, floor tiles, artificial leather, pipes, wires and cables, packaging films, bottles, foaming materials, sealing materials, fibers, etc.
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