LAST-A-FOAM® FR-4618 is a microcellular polyurethane foam designed for precision tooling, prototypes, and modeling applications, featuring an ultra-smooth surface that reduces priming and finishing time. It has a density of 18 lbs/ft³ (288 kg/m³), a compressive strength of 800 psi (5,500 kPa), a tensile strength of 670 psi (4,600 kPa), and a flexural strength of 970 psi (6,700 kPa). The material is dimensionally stable with a coefficient of thermal expansion of 30 × 10⁻⁶ in/in-°F (54 × 10⁻⁶ m/m-K) and a maximum use temperature of 200°F (93°C). It machines cleanly, producing shavings rather than dust, and is available in standard sheet sizes including 14 in × 60 in × 120 in and 24 in × 60 in × 96 in. It is ISO 9001:2015/AS9100D certified, Nadcap AC7130 Rev C and AC7130/1 Rev A compliant, and ITAR-compliant.
LAST-A-FOAM® FR-4600 microcell polyurethane foam supports the most intricate detail while eliminating extra prep work. With an even-smoother surface finish than our LAST-A-FOAM® FR-4500 material, it is superb for precision tooling applications, or as modeling foam. Advanced microcell technology creates a grain-free, ultra smooth exterior for painted finishes, significantly reducing process time. What's more, its finer cell structure is comparable to higher-density products without the added cost and weight. Unlike more dense glass microballoon-filled syntactic foams, this material greatly reduces tooling wear. The high-density foam is easily worked using CAD/CAM routers and CNC machines - or the simplest woodworking tools. The FR-4600's exceptional machining characteristics also make it an efficient material to create intricately patterned masters for composite and layup tools, and for mold and foundry patterns.
| General Plastics Manufacturing Co. | |
|---|---|
| Product Category | Foams and Foam Materials |
| Product Number | LAST-A-FOAM® FR-4618 |
| Product Name | Microcellular High Density Polyurethane Foam |
| Type | ClosedCell; Rigid; Foam |
