B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 27/06 (2006.01) B29C 43/20 (2006.01) B29C 44/06 (2006.01) B32B 5/18 (2006.01) C08J 5/00 (2006.01) C08J 9/12 (2006.01)
Patent
CA 2314016
The invention disclosed provides integral multilayered polymers with variable interlayer gaps, and processes for their manufacture. The materials thus produced consist of many layers of a polymeric material, which may be a single polymer or a blend of compatible polymers, separated by discontinuous narrow gaps containing air and/or a blowing agent. The layer density can be controlled within a wide range, typically 10 to 2000 layers/mm, while the gap width between the layers can be controlled either to ~ 100 nanometers (called nanolayered polymers) or ~ 1 micrometer (called microlayered polymers), depending on the process. These layered materials are mechanically strong and have excellent thermal and electrical, and sound insulation properties. Two distinct mechanisms were developed for producing such materials. A first process produces nanolayered polymers and involves first introducing a low degree of entanglement among some of the polymer chains and then breaking apart these entanglements using a blowing agent. The microlayer process involves the use of stress-induced nucleation to uniformly grow cells in the polymer containing dissolved blowing agent and force the cells to grow in a preferential direction.
Handa Paul
Zhang Zhiyi
Anderson J. Wayne
National Research Council Of Canada
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