DESCRIPTION
Description
Polyvinyl chloride(PVC) is high molecular compounds polymerized by vinyl chloride monomer(VCM) with structural element as
CH2 - CHCLn, degree of polymerization usually as 590 - 1500.In the process of re polymerization , affected by kinds of factors such as the polymerization process, reaction conditions, reactant composition, additives etc. it can produce eight different types of PVC
resin performance is different. According to residual content of vinyl chloride in polyvinyl chloride resin, is can be divided into : commercial grade, food hygiene grade and medical application grade in appearance, polyvinyl chloride resin is white powder
or pellet.
| Items | SG8 | SG7 | SG5 | SG3 |
| Average degree of polymerization | 650 - 740 | 750 - 850 | 980 - 1080 | 1250 - 1350 |
| K value | 55 - 59 | 60 - 62 | 66 - 68 | 71 - 72 |
| Viscosity | 73 - 86 | 87 - 95 | 107 - 118 | 127 - 135 |
| Foreign Particle | 16max | 16max | 16max | 16max |
| Volatile Matter, % | 30max | 30max | 30max | 30max |
| Apparent Density, g/ml | 0.53min | 0.53min | 0.48min | 0.48min |
| 0.25mm Sieve Retained, % | 2.0max | 2.0max | 1.0max | 1.0max |
| 0.063mm Sieve Retained, % | 97min | 97min | 95min | 98min |
| No. of Grain/400cm2 | 20max | 20max | 10max | 10max |
| Plasticizer absorption of 100g resin, g | 14min | 16min | 25min | 28min |
| Whitene S S Degree 160 ºC 10min, % | 80 | 80 | 80 | 80 |
| Residual Chlore Thylene Content, mg/kg | 1 | 1 | 1 | 1 |
Application SG - 1 is used in producing high - grade electrical insulating material.
SG - 2 is used in producing electrical insulating material, common soft products and film.
SG - 3 is used in producing electrical insulating materials, agricultural film, daily - use plastic products.
SG - 4 is used in producing membranelle for industrial and civil use, tube and pipes.
SG - 5 is used in producing transparent products section bar, hard tube and decorative materials.
SG - 6 is used in producing clear foil, hard board and welding rod.
SG - 7, SG - 8 is used in producing clear foil, hard injection molding.
