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Master Bond adhesives

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Northstar Polymers MPS-F04A 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 by the meter dispensing equipment. The components are stable liquid at room temperature and ambient pressure. It requires minimum tooling for a small production or short runs. These properties are ideal in small scale productions for custom foam applications such as custom seating, padding, and cushioning.

Generally, lower density grade foams are softer than higher density foams. For firmer foam quality, 8 or 6 pound-per-cubic foot formulas are recommended.

The free-rise density of the foam is 4.5 pounds per cubic foot, and the cell structure is designed to be 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 4.40 lb/ft³Free Rise Density
 4.90 lb/ft³Typical Compression Density
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore OO 30 - 45
Tensile Strength 30.0 psi
Elongation at Break 138 %
Compressive Strength 1.80 psi
@Strain 25 %
 3.50 psi
@Strain 50 %
Rebound 31 %Bashore Rebound
Tear Strength 4.00 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 - 0.500 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 0.170 - 0.250 min
 
Descriptive Properties
Curing AgentPPB-023
PrepolymerMSA-018
Weight Ratio1:1.27Prepolymer 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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