Fast-cooling composite mats made of cellulose and thermoplastic polymer after hot pressing
Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2022-02-08
- Publication Date
- 2026-04-08
AI Technical Summary
Existing manufacturing technologies for thermoplastic composite boards are energy-intensive and inefficient, particularly in the steps of heating, melting, forming, congealing, and cooling, and they often result in defects like steam-blows due to high moisture content and inadequate cooling processes.
A method involving a hot-pressing stage followed by a cold-pressing stage, with controlled pressure and temperature changes to rapidly heat and cool composite mats composed of paper and plastic fragments, using a processor to manage the platen operations and achieve a sudden temperature drop to congeal the plastic, while maintaining pressure to prevent defects.
This method reduces processing time and energy consumption, prevents defects like steam-blows, and achieves the desired core temperature and caliper in the composite boards efficiently.