PPA在塑料加工中的应用.ppt

PPA的应用 Recommendations in PE film extrusion Step 1: Create the PPA coating by running the line for 20-30 minutes with 5% of masterbatch (containing 2 to 5% of PPA).Step 2: Then reduce the concentration to 1wt% of masterbatch. PPA的应用 Recommendations in HDPE blow molding Step 1: Create the PPA coating by running the line for 20-30 minutes with 5% of masterbatch (containing 2 to 5% of PPA).Step 2: Then reduce the concentration to 1wt% of masterbatch and wait for the line to stabilize.Step 3: Reduce extrusion temperature by and wait for the line to stabilize.Step 4: Reduce cycle time by 10% and wait for the line to stabilize.Step 5: Based on results, continue reducing cycle time by steps of 2% if possible. PPA系列产品 主要是偏二氟乙烯类(VDF／HFP、VDF／HFP／TFE)的二元或三元共聚物。偏二氟乙烯类含氟聚合物PPA由于其自身的独特性能，加工应用中具有多方面的优点： ·具有含氟聚合物的化学和热稳定性(370℃以内)，热塑性塑料的可加工性，宽阔的熔点范围介于115℃和175℃ ·最优性价比的含氟聚合物之一，与聚烯烃性质上不相容 ·非常低的表面张力 ·极为纯净，可完全用于食品和药品行业，满足FDAl77．2600和US PCIass，V要求 PPA的应用 Recommendations in pipe extrusion Step 1: Create the PPA coating by running the line for 20-30 minutes with 5% of masterbatch (containing 2 to 5% of PPA).Step 2: Then reduce the concentration to 1wt% of masterbatch and wait for the line to stabilize.Step 3: Reduce extrusion temperature by and wait for the line to stabilize.Step 4: Increase line throughtput by 10% step by step. 浓缩母粒制备 PPA系列产品 硅酮系列 PPA在塑料加工中的应用 北京化工大学 苑会林 减少凝胶 PPA 随着加工时间的延续颜色变化小 消除鲨鱼皮 降低口模压力 降低剪切发热 减少口模堆积物形成 PPA应用领域 纤维 在聚烯烃加工中的应用 电缆 管道 BOPP/OPP拉伸薄膜 HDPE中空 PE、PP片材 应用领域 PE薄膜 消除鲨鱼皮-熔体破裂 消除凝胶 塑料瓶外表面 改善表面光洁度 PPA的种类 低分子聚四氟乙烯 Dynamar 硅酮 聚乙烯蜡 其他外润滑剂 低分子聚偏氟乙烯 PPA的类型 PPA对薄膜落标冲击强度的影响 ? Wide Die Gap( Die Gap) Narrow Die Gap( Die Gap) ControlNo PPA 1500 ppm ControlNo PPA 1500 ppm FX 9613 FX FX 9613 FX Dart Impact, grams/50(ASTM 1708 Method A) 170 196 200 105* 192 238 提高光泽度 加工母粒的制作 加工用PPA助剂含量200ppm 母粒法加入，母粒加入量2% 改善印刷质量 Die Build-Up Reduction Die Build-Up Reduction in LLDPE eliminate melt fracture Melt Fracture