薄膜穿刺測試（派克圓珠筆測試）的概要說明
- 對於包裝材料，在包裝硬的、尖銳或有角的物品時，所施加負載是很重要的。若薄膜被用於食品或有尖銳邊緣的包材，充分理解抗穿刺性是十分重要的。
- EN 14477標準的穿刺測試用一個直徑為0.8 mm的穿刺探針來測定該性能。這個測試也叫作派克圓珠筆測試。
- 在這個測試中，將一個條狀試片夾在下部試片夾具上。透過一個可更換的探針將試片從上面穿刺，測得最大穿刺力。
- ASTM F1306 describes a method with very similar objectives for measurement of flexible barrier films and laminates. It uses an indenter with a tip radius of 1.6 mm and a conical shaft with a 6° angle. The test is performed on a film strip, which is fastened over an opening with a 35 mm diameter.
Protrusion puncture resistance of stretch wrap film
This method, which is described in ASTM D5748, requires a larger radius indenter coated with PTFE to minimize friction. Throughout the deformation process, the film is significantly stretched before the indenter causes it to fail. Therefore, in addition to the puncture force, the deformation behavior of the film is also characterized in a multi-axial stress state.
