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Rulon Bearings

General Plastics LAST-A-FOAM® FR-3720 Polyurethane Foam
Categories: Other Engineering Material; Composite Core Material; Polymer; Thermoset; Polyurethane, TS; Thermoset Polyurethane Foam, Unreinforced

Material Notes: Product Description: LAST-A-FOAM® 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. Tougher and less friable than our FR-6700 series, this aerospace-grade, BMS 8-133-qualified foam enables cutting of crisper edges, making it well-suited to machining complex shapes for composite cores. 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 excellent resistance to water absorption and will not swell, crack, or split on exposure to water. LAST-A-FOAM® FR-3700 provides exceptional protection for hazardous cargo and payloads as an impact- and fire-insulation liner in transport or packaging containers. It also serves as human bone test media.

Features:

  • Stable
  • Inert
  • Resistant to most chemicals and solvents
  • Easily shaped with common woodworking tools
  • Performs well as wood replacement
  • Will not support fungal growth
Applications:
  • Models and design prototypes
  • Composite Core
  • Honeycomb edge close-out for aircraft interior sandwich panels used in overhead storage bins, passenger cabin class dividers, galleys and lavatories
  • Vacuum form dies and mold patterns

Information provided by General Plastics Manufacturing Company

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Mechanical PropertiesMetricEnglishComments
Hardness, Shore D 5.75.73 lbs/ft3, cut foam surface
 71.671.640 lbs/ft3, cut foam surface
 
Electrical PropertiesMetricEnglishComments
Dielectric Constant 1.05 - 1.4
@Frequency 1e+6 Hz
1.05 - 1.4
@Frequency 1e+6 Hz
3-20 lbs/ft3
 
Thermal PropertiesMetricEnglishComments
CTE, linear 61.2 µm/m-°C
@Temperature 23.9 - 121 °C
34.0 µin/in-°F
@Temperature 75.0 - 250 °F
Thermal Conductivity 0.0503 W/m-K0.349 BTU-in/hr-ft²-°FASTM C518
Maximum Service Temperature, Air 121 °C250 °F
Minimum Service Temperature, Air -196 °C-320 °F
 
Descriptive Properties
Closed Cell Content95%3 lbs/ft3, ASTM D2856, Procedure B
 98%25 lbs/ft3, ASTM D2856, Procedure B
Tumbling Friability (%)040 lbs/ft3, 20 mins at 60 rpm, ASTM C421
 23.63 lbs/ft3, 20 mins at 60 rpm, ASTM C421
Water Absorption0.01 lbs/ft²at 18 lbs/ft³, ASTM D2842
 0.02 lbs/ft²at 3 lbs/ft³, ASTM D2842

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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PGENR012 / 186798

Master Bond adhesives

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