聚氯乙烯PVC物料性能和成型性能

物料性能
Material properties
力学性能,电性能优良,耐酸碱力*,化学稳定性好,但软化
Mechanical properties, excellent electrical properties, acid and alkali resistance, chemical stability is good, but the softening point is low.
适于制作薄板,电线电缆绝缘层,密封件等.
Suitable for the production of thin plate, wire and cable insulation, seals and so on.
成型性能
formability
1.无定形料,吸湿小,流动性差.为了提高流动性,防止发生气泡,塑料可预先干燥.模具浇注系统宜粗短,浇口截面宜大,不得有死角.模具须冷却,表面镀铬.
1. Amorphous material, moisture absorption is small, poor liquidity. In order to improve the liquidity and prevent the occurrence of bubbles, plastics may be pre drying. Mold gating system should be thick and short, gate section should be large, not dead. Mold need to be cooled, chrome plated surface.
2.极易分解,在200度温度下与钢.铜接触更易分解,分解时逸出腐蚀.刺激性气体.成型温度范围小.
. very easy decomposition, decomposition temperature of 200 degrees and steel. Copper contact more easily, decomposition of escape when corrosion. Stimulation of gas. Molding temperature range.
3.采用螺杆式注射机喷嘴时,孔径宜大,以防死角滞料.好不带镶件,如有镶件应预热.
The 3 screw injection molding machine nozzle, aperture should be large, to prevent the dead. It inserts with hysteresis material, such as inserts should be preheated.