Claims
- 1. A dimensionally-stable, extruded, open-cell, propylene polymer foam, comprising: a propylene polymer material comprising greater than 50 percent by weight of propylene monomeric units, the foam having a density about 96 kilograms per cubic meter or less, the foam being greater than 20 percent open cell, the foam being in plank form, the foam having a major dimension in cross-section of about 5 centimeters or more, the foam have a cross-sectional area of about 10 square centimeters or more.
- 2. The foam of claim 1, wherein the foam is from about 30 to about 70 percent open cell.
- 3. The foam of claim 1, wherein the foam has an average cell size of about 2 millimeters or less.
- 4. The foam of claim 1, wherein the foam has a density of less than about 48 kilograms per cubic meter.
- 5. The foam of claim 1, wherein the propylene polymer material comprises greater than 70 percent by weight of propylene monomeric units.
- 6. The foam of claim 1, wherein the foam additionally comprises glycerol monostearate.
- 7. The foam of claim 1, wherein the foam has an average cell wall thickness of less than 35 micrometers.
- 8. The foam of claim 1, wherein the foam has an average cell wall thickness of less than 25 micrometers.
- 9. The foam of claim 1, wherein the foam has an average cell wall thickness of less than 15 micrometers.
CROSS-REFERENCE TO RELATED APPLICATION
This is a continuation of application Ser. No. 07/988,057, filed Dec. 9, 1992, now abandoned.
US Referenced Citations (10)
Continuations (1)
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Number |
Date |
Country |
Parent |
988057 |
Dec 1992 |
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