When producing lightweight PET sandwich panels, reducing density by 5% to save weight – what performance penalty can be expected?
Foam core compressive strength follows a power law σ[…]
Why do different resin systems (unsaturated polyester, epoxy, polyurethane) have widely varying compatibility with cores?
The key lies in “like dissolves like” – polarity,[…]
Why is edge sealing of sandwich panels critical for long-term service life?
Exposed core material at cut edges is the primary[…]
Why is it necessary to control the amount of acrylate toughening agent in PVC foam formulations?
Toughening agents (typically core-shell rubber or acrylates) improve the[…]
How can you detect whether XPS sandwich panels contain recycled material? What are the engineering risks?
Recycled XPS typically undergoes multiple thermal histories, degrading molecular[…]
PET foam cores undergo crystallinity changes during thermoforming or thermal bonding; how does this affect mechanical properties?
PET is a semi-crystalline thermoplastic. The as-foamed board has[…]
How to control the uniformity of core density distribution during PU sandwich panel production?
PU foaming is an exothermic and flow-driven process, prone[…]
Why do some XPS sandwich panels develop an “orange peel” texture on the surface? Does it affect performance?
Orange peel results from uneven melt surface tension as[…]
What hidden issues can incomplete foaming reaction during PU sandwich panel production cause?
Incomplete foaming means the isocyanate and polyol have not[…]
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