粗大浓稠硕大噗嗤噗嗤h,精品人妻码一区二区三区,国产av无码专区亚洲精品,日韩a片无码毛片免费看小说

TPEE杜邦美國G5544耐高溫

TPEE簡介：

TPEE具有高強度、高彈性、耐油、耐酸堿、耐高溫、耐輻射，動態(tài)力學性能特優(yōu)等特性；使用溫度范圍為－50℃～＋180℃，硬度范圍30-75D，分為高性能級、擠出級、吹塑級、阻燃級和改性級。

產品通過SGS認證，UL認證。不含重金屬，PBB和PBDE，符合歐盟ROHS指令；阻燃系列產品可達到UL-94 V-0級，氧指數(shù)27，介電強度20MV/m，體積電阻率大于1×1010Ω.m。

TPEE（熱塑性聚酯彈性體）是含有聚酯硬段和聚醚軟段的嵌段共聚物。其中聚醚軟段和未結晶的聚酯形成無定形相聚酯硬段部分結晶形成結晶微區(qū)，起物理交聯(lián)點的作用。TPEE具有橡膠的彈性和工程塑料的強度；軟段賦予它彈性，使它象橡膠；硬段賦予它加工性能，使它象塑料；與橡膠相比，它具有更好的加工性能和更長的使用壽命；與工程料相比，同樣具有強度高的特點，而柔韌性和動態(tài)力學性能更好

性能特點

TPEE性能特點

高性能級：結構強度高、耐蠕變性好、回彈性優(yōu)異、抗沖和耐彎曲疲勞、耐磨、尺寸穩(wěn)定。在低溫時具有柔韌性，在高溫下也能保持良好的性能。除此而外，它還能抵制許多工業(yè)化學品、油和溶劑導致的腐蝕。

擠出級：除具有高性能級的特點外,熔體強度更好,專用于擠出成型。

吹塑級：除具有高性能級的特點外，還具有良好的熔體強度。

改性級：是多元嵌段共聚物，是優(yōu)良的塑料改性劑，用于改進POM、PBT的抗沖性。

阻燃級：是高性能級與自制阻燃母料共混物，以滿足材料阻燃的要求。

Methods: TPEE can be produced easily by injection molding, extrusion, blow molding, rotational molding, melt casting and other thermoplastic processing methods. Depending on the processing method and the type of polymer, it can be processed from 177 °C to 260 °C. All grades have a clear melting point and excellent melt stability. TPEE is resistant to Hydrolysis, does not react with moisture in the air, it has weak water absorption, in order to make the piece perfect, need to dry before use, although moisture content is below 0.1% , extrusion and molding processing will not produce defects. TPEE degrades at high temperatures in the presence of acidic media. Therefore, TPEE can not be combined with acid additives. The viscosity of TPEE is not sensitive to shear rate, especially at low shear rate (E. G. extrusion) . The product must be dried for 4 ~ 6 hours in an air blast oven at 80 ~ 110 °C before processing. The recycled material can be mixed with the new material, but the dosage should not exceed 25% . INJECTION MOLDING: THE MATERIAL TEMPERATURE SHOULD BE 5 ~ 15 °C higher than the product melting range, mold temperature is 20 ~ 50 °C, injection pressure is 60 ~ 100 MPA, injection speed is medium and low. Extrusion blow molding: The ratio of screw length to diameter is 24∶1, the barrel temperature should be higher than the product melting range 5 ~ 10 °C.