1 高密度聚乙烯，英文名称为“High Density Polyethylene”，简称为“HDPE”。

HDPE无毒、无味、无臭，密度为0.940～0.976g/cm3，它是在在齐格勒催化剂催化下，在低压条件下聚合的产物，所以高密度聚乙烯亦成为低压聚乙烯。

HDPE是一种由乙烯共聚生成结晶度高、非极性的热塑性树脂。原态HDPE的外表呈乳白色，在微薄截面呈一定程度的半透明状。其具有优良的耐大多数生活和工业用化学品的特性，它能抗强氧化剂（浓硝酸）、酸碱盐以及有机溶剂（）的腐蚀和溶解。该聚合物不吸湿并具有好的防水蒸汽性，可用于防潮防渗用途。

不足之处是其耐老化性能和环境应力开裂性不如LDPE，特别是热氧化作用会使其性能降低，所以高密度聚乙烯在制成塑料卷材时添加了抗氧化剂和紫外线吸收剂来改善其不足之处。

UHMW-PE是一种韧度极好的材料，它的耐低温性能也非常优异，在-269℃低温下，仍具有一定的延展性，而没有脆裂迹象。但线膨胀系数较大，导热性很差，所以在设计塑料制品时，应要充分考虑。

6、 电性能

体积电阻大，击穿电压达50KV/MM，介电常数为2.3.在较宽限温度及频率范围内,适宜用作电气工程的结构材料。

7、 卫生无毒

UHMW-PE材料是无味、无毒、无臭，本身无腐蚀性，具有生理惰性和生理适应性。美国食品与药品管理局（FDA）和美国农业部（USDA）允许它可用于与食品和药品接触的加工场合

1. High Density Polyethylene, also known as "HDPE" in English.

HDPE mak non-toxic, odorless, no odorless, with a density of 0.940-0.976g/cm3. It is a product of polymerization under low pressure conditions catalyzed by Ziegler catalysts, making high-density polyethylene also known as low-pressure polyethylene.

HDPE mak thermoplastic resin with high crystallinity and non polarity generated by ethylene copolymerization. HDPE Ida iha rezistence di'ak liu ba ema nain no ķímika industriál barak, no bele reziste korozaun no dissolusaun ba agenta oxidizing sira ne ' ebé forte (sidade Aziál konsidera), sán alkali no solusaun organika (carbon tetrachloride). Polimeru ne'e la hygroscopic no iha fatin neʼebé iha uma adat no resisténsia vapor, ne'e halo ida-neʼe besik ba objetivu moisture no pájina anti-seepage.

disadvantage ne'e mak katak ninia aumenta resistencia no stresu medioal cracking resistensia mak la hanesan LDPE, liu-liu tanba oxidation thermal, ne ' ebé bele reducu sira-nia performanta. Tan-neʼe, iha halo ema metade-density polyethylene plastic rolls, antioxidants no ultraviolet absorbasaun ne ' ebé mak aumenta atu improvina sira-nia fali.

UHMW-PE maibe koefisiente Expansaun lineár mak barak no konduténsia termíral ne'e poor, nune'e sei dezeña produtu plastic, konsiderasaun kompletu tenke nune'e.

6. Electrical performance

Large volume resistance, breakdown voltage up to 50KV/MM, dielectric constant of 2.3. Suitable for use as a structural material in electrical engineering in a wide temperature and frequency range.

7. Hygienic no non-toxic

UHMW-PE material mak odorless, non-toxic, odorless, no inherently non corrosive, ho inertness physiological no adaptability. Administrasaun Food no Drog Estadus (FDA) no Departamentu estadus Agricultura (USDA) permite atu uza iha situasaun processu ne ' ebé hetan kontaktu ba food no droga