Properties: It is thermoplastic, insoluble in water, gasoline and ethanol, expandable or soluble in ether, ketone, fatty chlorohy-drocarbons or aromatic hydrocarbons with strong anti--corrosiveness, and good dieletric property. Features: White powder, it will appear different physical and mechanical properties after add various additives to it. It has better quality of mechanic feature, anticorrosion, dielectric and anti-chemicals. Quality standard: It' s complied to the standard GBT5761-93 Type: SG1 SG2 SG3 SG4 SG5 SG6 SG7 SG8 Viscosity, ml/ g( or K value) 156-144 ( 77-75) 143-136 ( 74-73) 135-127 ( 72-71) 1350-1250 126-119 ( 70-69) 1250-1150 118-107 ( 68-66) 1100-1000 106-96 ( 65-63) 950-850 95-87 ( 62-60) 850-750 86-73 ( 59-55) 750-650 Number of impurity particle d 30 30 30 30 30 30 40 40 Volatiles content % , d 0.40 0.40 0.40 0.40 0.40 0.40 0.40 0.40 g/ mle Apparent density 0.42 0.42 0.42 0.42 0.42 0.45 0.45 0.45 Residual after sieve 0.25mm mesh d 0.063mm le 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 90 90 90 90 90 90 90 90 Number of grain/ 400cm 2 d 40 40 40 40 40 40 40 40 Plasticizer absorbency value of 100g resin 25 25 25 22 19 16 14 14 Whiteness % , e 74 74 74 74 74 74 70 70 Water extractant solution conductivity, s/ m d 5× 10 -3 5× 10 -3 5× 10 -3 Residual chlore thylene content mg/ kg d 5 5 5 5 5 5 5 5 Ethylidene chloride mg/ kg d 150 150 150 150 150 150 150 150