XPS’s high closed-cell rate ensures very low water absorption (<0.3%), but its polystyrene molecular chains are linear and non-crosslinked, making it prone to creep under long-term load. When compressive stress exceeds its proportional limit (approximately 0.5 MPa), cell walls permanently collapse due to molecular chain slip. Additionally, XPS has a heat deflection temperature of only about 75°C, and summer dark roof surfaces can exceed 85°C, causing core softening. Therefore, XPS sandwich panels are only recommended for non-load-bearing insulated walls, underfloor heating layers, or temporary structures. For load-bearing floors, thickness must be increased to over 200mm with distributed reinforcement.
XPS extruded board has a closed-cell rate of over 98%, so why is it rarely used in load-bearing sandwich panel structures?
- XPS Foam Core
- PET Foam Core
- PVC Foam Core
- PU Foam Core
- PMI Foam Core
- PP Honeycomb Core
- Balsa Wood
- XPS Backer Board
- FRP XPS Sandwich Panel
- FRP PET Sandwich Panel
- FRP PVC Sandwich Panel
- FRP PP Honeycomb Panel
- info@onebondgroup.net
- 0086–15818199755
- whatsapp: +65 91730168
- wechat:15818199755
Contact
- info@onebondgroup.net
- 0086–15818199755
- whatsapp: +65 91730168
- wechat:15818199755
© FOSHAN ONEBOND BUILDING MATERIALS CO.,LTD