Gas proofing process of hollow polyester bodies

B - Operations – Transporting – 29 – C

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18/509

B29C 49/00 (2006.01) B05D 7/02 (2006.01) B05D 7/22 (2006.01) B29C 49/22 (2006.01)

Patent

CA 1120674

PRECIS DE LA DIVULGATION: L'invention est relative à un procédé pour l'obtention de corps creux biorientés en polyester. Selon l'invention on revêt l'une des parois de la préforme, à l'aide d'une composition aqueuse constituée d'au moins deux polymères incompatibles dont l'un est un alcool polyvinylique soluble dans l'eau et l'autre est un latex de polymère peu sensible à l'eau, le revêtement est séché et la préforme est biétirée-soufflée. Les corps creux obtenus sont imperméables aux gaz et aux aromes.

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