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Northstar Polymers MPS-F08A Hand-Mixable Flexible Foam
Categories: Polymer; Thermoset; Polyurethane, TS; Thermoset Polyurethane Foam, Unreinforced

Material Notes: This foam formulation is designed to make molded flexible foam parts/sheets/dies/blocks by hand-mixing or machine casting by the meter dispensing equipment. The components are stable and liquid at room temperature and ambient pressure. It requires minimum tooling for a small production or short runs. The mixing ratio is simple 1:2 by volume. These properties are ideal in small scale productions for custom foam applications such as custom seating, padding, and cushioning. Generally this medium density foam yields firmer foam comparing to lower density foams. For softer, less firm foam quality, a 6 pound-per-cubic foot formula MPS-F06B is recommended. Or for firmer grade, use firm-flexible foam FFM-1.

The free-rise density of the foam is 7.5 pounds per cubic foot, and the cell structure is open-cell. This is an MDI base water-blown polyester/polyether hybrid system, and it does not use flammable or ozone-layer-depleting auxiliary blowing agents

Examples for Applications:

  • Molded Upholstery Parts
  • Custom Seating, Padding, and Cushioning Parts
  • Custom Packaging of Impact/Vibration-Sensitive Items
  • Prototyping

Information provided by Northstar Polymers.

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Physical PropertiesOriginal ValueComments
Density 7.50 lb/ft³Free Rise Density
 8.00 lb/ft³Typical Compression Density
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore OO 25 - 35
Tensile Strength 48.0 psi
Elongation at Break 130 %
Compressive Strength 3.50 psi
@Strain 25 %
 9.20 psi
@Strain 50 %
Rebound 30 %Bashore Rebound
Tear Strength 3.40 pliSplit Tear Resistance
 
Processing PropertiesOriginal ValueComments
Processing Temperature 70.0 - 90.0 °FPrepolymer Temperature
 70.0 - 90.0 °FCuring Agent Temperature
Mold Temperature 100 - 130 °F
Cure Time 0.330 - 0.670 hour
@Temperature 43.3 °C
De-mold Time
 1.00 hour
@Temperature 82.2 °C
Complete Cure Cycle
 24.0 hour
@Temperature 25.0 °C
Complete Cure Cycle
Pot Life 0.500 min
 
Descriptive Properties
Curing AgentPPC-031
PrepolymerMSA-018
Weight Ratio1:1.7Prepolymer to Curing Agent Ratio

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 go back to viewing the property data in MatWeb's normal format.

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PNORTH897 / 162613

Specialty Compounds RTP Company

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