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Sekisui Kaseihin Kogyo KK
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Sekisui Kaseihin Kogyo KK
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Application filed by Sekisui Kaseihin Kogyo KKfiledCriticalSekisui Kaseihin Kogyo KK
Priority to CA000444934ApriorityCriticalpatent/CA1221211A/fr
Application grantedgrantedCritical
Publication of CA1221211ApublicationCriticalpatent/CA1221211A/fr
Process and apparatus for forming a composite foamed polymeric sheet structure having comparatively high density skin layers and a comparatively low density core layer