LAST-A-FOAM™ FR-3730 is a rigid, flame-retardant polyurethane foam with a density of 30 lb/ft³ (481 kg/m³), offering a compressive strength of 2,950 psi (20,300 kPa), tensile strength of 1,300 psi (9,000 kPa), shear strength of 1,300 psi (9,000 kPa), and flexural strength of 1,900 psi (19,000 kPa). It has a maximum continuous use temperature of 260°F (127°C) and a coefficient of thermal expansion of 35 × 10⁻⁶ in/in-°F. The material is machinable with standard tools and exhibits low water absorption due to its closed-cell structure.
FR-3700 is a CFC-free, rigid, closed-cell, flame-retardant polyurethane foam available in densities ranging from 3 to 40 pounds per cubic foot. It exhibits a high strength-to-weight ratio due to its cellular structure and cross-linked resin. Because of its closed-cell structure, LAST-A-FOAM® FR-3700 has great resistance to water absorption, and will not swell, crack, or split on exposure to water. This series is non-abrasive and can be machined with standard high-speed steel (HSS) cutting tools. It can also be cut cleanly with water jets and traditional wood-carving tools. This flame-retardant polyurethane foam particularly supports the following industries.
| General Plastics Manufacturing Co. | |
|---|---|
| Product Category | Foams and Foam Materials |
| Product Number | LAST-A-FOAM® FR-3730 |
| Product Name | Flame-retardant Polyurethane Foam |
| Type | ClosedCell; Rigid; Foam |
| Form / Shape | Stock Shape / Machining Grade; Film / Sheet |
| Material / Composition | Polymer / Plastic; Polyurethane |
