熱固型聚氨酯彈性體-簡稱PU，英文名稱 Casting Polyurethane，俗稱PU優力膠，是由聚物多元醇與異氰酸酯反應而成，因硬度可以客戶需求調整(邵氏A10到邵氏D75)，固歸屬於一種介於塑料與橡膠之間的新型合成材料。根據聚氨酯彈性體主鏈結構不同可分為聚醚和聚酯兩種。
Casting Polyurethane-abbreviated PU,commonly known as urethane,by reaction of polymer polyol and isocyanate,therefore, the hardness can be adjusted to customers needs(Shaw A10 to Shaw D75),so attributed to a new synthetic materials cross between plastic and rubber. According to the difference of main chain structure of polyurethane elastomers can be divided into polyether and polyester.
Product Features
聚胺酯抗多種酸鹼和有機溶劑腐蝕，因此經常被用在橡膠製品在惡劣環境下的替代品。
Polyurethane resist corrosion from variety of acid and organic solvents,therefore,it often be used as a alternative of rubber products in harsh environments.
聚胺酯的力學性能具有很大的可調性。通過控制結晶的硬段和不結晶的軟段之間的比例，聚胺酯可以獲得不同的力學性能。 因此其製品具有耐磨、耐溫、密封、隔音、加工性能好、可降解等優異性能。
| 特性 橡膠名 Feature Rubber name | PU | 人造膠 Synthetic rubber | 耐油膠 Oil-resistant rubber | 天然橡膠 Natural rubber |
| 抗張力 Tensile |  |  | |  |
| 伸張率 Elongation | | | | |
| 耐油性 Oil resistance | |  | | |
| 耐摩耗性 Abrasion resistance | | | | |
| 反播彈性 Anti-broadcast elasticity | | | | |
表示特優Premium
表示優秀Excellent
表示良好 Good
表示尚可Passable
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