Multi-Layer Co-Extrusion (5-Layer vs. 7-Layer) a cikin Masana'antar Fim ɗin Stretch

5-Layer vs. 7-Layer inji shimfiɗa fim idan aka kwatanta: co-extrusion gine, huda da downgauging riba, farashi, da yadda ake tabbatar da da'awar mai kaya tare da bayanan gwaji na gaske.