Method and apparatus for manufacturing press-molded body
The method addresses the challenges of hard mold release and high manufacturing costs in press-molded poly(3-hydroxyalkanoate) resin production by using molds with low surface free energy to facilitate reduced press molding temperatures and pressures, resulting in improved mold release and cost efficiency.
Patent Information
- Application Number
- JP2023145440
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-09-07
- Publication Date
- 2025-03-19
AI Technical Summary
The existing methods for manufacturing press-molded bodies using poly(3-hydroxyalkanoate) resin face challenges such as hard mold releaseability, high press molding pressure and temperature requirements, and extended molding times, which increase manufacturing costs and risk deformation during mold release.
A method and apparatus for manufacturing press-molded bodies with improved mold release properties, involving a resin composition containing poly(3-hydroxyalkanoate) resin, which is heated to form a molten resin composition. The molten resin is then supplied between molds with surface free energy of 26.0 mN/m or less, allowing for reduced press molding temperature or pressure and enhanced mold release.
The method achieves excellent mold release properties, reduces press molding temperature and pressure, and shortens molding time, thereby lowering manufacturing costs and preventing deformation during mold release.