PP-聚丙烯
Polypropylene shows a high mechanical strength, tensile strength, but a low notched impact strength, PP resists stress cracking and it is easy to weld. At minus temperatures it can
become brittle. The chemical and electrical properties are very good.

聚丙烯具有高剛性，高硬度和高強度，但缺口衝擊韌性一般。PP材料能承受拉抗應力並且易焊接。化學穩定性和電氣性相當良好，耐蒸氣。

★low density 低密度
★good heat resistance 耐熱，不變形
★high tensile strength, 高剛性
★high surface strength 高表面強度
★high chemical resistance 化學穩定性好
★food safe 無毒無害

☆low oxidation resistance 耐氧化性一般
☆low abrasion resistance 耐磨強度一般
☆HF-welding not possible 不可高頻焊接
☆difficult to varnish and glue 粘接和油漆性一般
☆not weather resistant 易受天氣條件限制