Thermoset Syntactic Foam

HYTAC® LPX is a new epoxy syntactic plug assist material aimed at providing heavy gauge thermoformers with a proven solution that meets the demands of large plug requirements.

HYTAC® LPX is designed for custom-cast requirements where wood cannot provide the required quality and where heated aluminum is too expensive. It is available as a solid syntactic or as the outer layer of a two-part system consisting of a core of epoxy coated large, hollow composite spheres and an exterior of high-performance syntactic foam. LPX is a specialized formulation that enhances friction and reduces the risk of cracking in large geometries.

Low thermal conductivity and specific heat
The syntactic foam structure of HYTAC® LPX maintains the low thermal conductivity desired in a plug assist material.

Easily machined or formed
HYTAC® LPX may be cast to near net shape and/or machined using conventional equipment.




HYTAC-LPX now makes it possible for heavy gauge thermoforming applications to realize the same material distribution/sheet thickness reductions and energy savings as are expected in thin-gauge thermoforming.


Typical Properties

Color Off-white
Density 48-52 lb/ft3 [768-833 kg/m3]
Thermal Conductivity 0.10 BTU/hr-ft-°F [0.17 W/m°K]
Coefficient of Thermal Expansion 22 x 10-6 in/in/°F [41 x 10-6 m/m/°C]
Compressive Strength 8,530 psi [58.8 MPa]
Service Temperature 350°F (176°C)
Flexural Toughness (ASTM D790) 5.8 psi [39.9 kPa]