Extrusion & Post
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PPO Film Reactive Casting Process
Problembeschreibung
【Problem Phenomenon】PPO film preparation process is special, and conventional casting cannot form film
Ursachenanalyse
PPO film needs reactive modification with maleic anhydride before casting: PPO 100 parts + maleic anhydride 1.5 parts + peroxide 1.0 parts, twin-screw reactive extrusion at 300℃, dissolved in dichloromethane and cast into film
Lösung
Prepare according to the reactive extrusion-dissolution casting process route; the small amount of maleic anhydride has little effect on original performance; dielectric constant 2.5-2.6 is maintained; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Wichtigste Erkenntnis
PPO film follows the reactive modification casting route; direct casting does not work; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for subsequent similar problems
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