Extrusion & Post
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PPO Compression Molding Temperature Procedure
Problem Phenomenon
【Problem Phenomenon】PPO compression molded products have unstable performance, and laminates delaminate
Cause Analysis
PPO compression molding procedure: raise mold temperature to 250℃ and hold for 5min, pressure 6MPa, continuously heat up to 300℃ and hold for 1h, naturally cool to 180℃ then pass cold water to room temperature for demolding; the temperature and pressure rhythm must be strictly executed
Solution
Execute according to the 250℃→300℃→180℃ temperature rhythm and 6MPa pressure; adjust holding time in proportion to thickness; laminate resin content 35%±5% dried at 70-110℃
Key Takeaway
PPO compression molding follows the 250/300/180℃ three-stage rhythm, no hurry allowed; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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