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Density varies when the amount of blowing agent (water content) changes. The density of polyurethane decreases with increase in water content (See Fig. 1). This relationship can be shown as follows: W = 3.706 / D 1.126. Where: W = % of water content D = Density of foam (lbs./ft3.)
The foam industry utilizes specialized tests, terminology and equipment to accomplish this. The following are key performance characteristics and how they are measured. DENSITY. Density is a measurement of the mass per unit volume.
Solid rigid polyurethane foam provides a uniform structure with only +/-10% variation in density. Material properties cover a broad range of human bone qualities allowing you to select an appropriate density for your study.
Mechanical properties of foams have been measured in compression tests for two foams of 16 kg/m3 and 62 kg/m3 density, and in tension and shearing tests for foam of 62 kg/m3 density. PU foams have shown anisotropic properties as measured in parallel and perpendicular direction to the foam rise.
Solid rigid polyurethane foam provides a uniform structure with only +/-10% variation in density. Material properties cover a broad range of human bone qualities allowing you to select an appropriate density for your study.
Polyurethane Flexible Foam - Density, Hardness & Resilience. Headings you add to the document will appear here. To enable screen reader support, press Ctrl+Alt+Z To learn about keyboard...
Integral Skin Polyurethane Foam: Also known as self-skin foam, this type features a high-density skin and a low-density core. It’s popular in applications requiring durability and a comfortable grip, such as in handles of tools.
