Polyvinyl chloride 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 | SG3 | SG5 | SG7 | SG8 |
K value | 72-71 | 68-66 | 62-60 | 59-55 |
Viscosity
Number (ml/g) |
135-127 | 118-107 | 95-87 | |
Average degree of polymerization | 1370-1251 | 1135-981 | 845-741 | 740-650 |
N umber of impurity substance | ≤16 | ≤16 | ≤20 | ≤20 |
Mass fraction of volatiles
(including water) |
≤
0.30
|
≤0.40
|
≤0.40 |
≤0.40
|
A ppe a rance density | ≥0.45 | ≥0.48 | ≥0.50 | ≥0.50 |
Number of "fish eye"
|
≤ 20 | ≤ 20 | ≤ 30 | ≤ 30 |
Whiteness(160ºC,10min)% | ≥78 | ≥75 | ≥75 | ≥75 |
VCM residue | ≤ 5 | ≤ 5 | ≤ 5 | ≤ 5 |
Packing | 25kgs two layers draft paper bag or 1000kgs PP bag |
25KG BAG For China Manufacturer Polyvinyl Chloride Virgin Material Sg3/Sg5/Sg7/Sg8 White Powder PVC Resin
Polyvinyl chloride resin is widely used in production of polyvinyl chloride boardy leatheroid, paint and adhesive agents,tec. Paint and adhesive .
S
g
3 is used to make ordinary soft products, such as: wire,
plastic
sandals, film, packaging bag, hose, toys, crafts, auto parts, foam plastic
etc.
Sg5 is a universal resin, which can be used to produce foaming materials,
pipes
, profiles, boards
etc.
Sg7 is used for the production of hard products, production of sheet, sheet, such as: doors and Windows, flooring, furniture, decorative materials, wood products
etc.
Sg 8 is used to produce hard products such as sheet, sheet, pipe fittings, etc.