Effect of curing moisture on the indentation force deflection of flexible polyurethane foam |
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| Authors: | Haifeng Ni Chee Keong Yap Yan Jin |
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| Affiliation: | 1. Shanghai Office, Johnson Controls, Incorporated, Shanghai 200051, China;2. Tri‐Con Industries, Limited, 4000 NW 44th Street, Lincoln, Nebraska 68524;3. Wuxi Professional College of Science and Technology, Wuxi 214018, China |
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| Abstract: | The moisture effect on the indentation force deflection (IFD) of flexible polyurethane foam was examined through the curing of the foam with different moisture contents. The employed foam was cured at 30, 40, 50, 60, 70, and 80% relative humidity, and the corresponding curing temperature was constant at 23°C. The experiments showed that the measured IFD and support factor of the flexible polyurethane foam decreased, and the hysteresis increased with the curing moisture. A statistical conversion formula was generated experimentally to correct the measured IFD of the flexible polyurethane foam to eliminate the deviation caused by the moisture effect. The measured IFD was inversely exponentially proportional to the curing moisture. The accuracy of the correction formula was verified by the conditioning of the foam again with different moisture contents. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 104: 1679–1682, 2007 |
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| Keywords: | curing of polymers foams indentation polyurethanes |
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