Laminates on the basis of polypropylene and process for preparing such laminates

R.J.H. Burlett (Inventor), P.J. Lemstra (Inventor), H.E.H. Meijer (Inventor), Stamicarbon (Inventor)

    Research output: PatentPatent publication

    73 Downloads (Pure)

    Abstract

    The invention accords to a laminate at least consisting of a first layer from a mixture of at least a propylene polymer and an ethylene-vinylalcohol copolymer and a second layer from at least one propylene polymer, the first layer at least consisting of a mixture of 60-99 parts by weight of a substantially crystalline propylene polymer and 1-40 parts by weight of an ethylene-vinylalcohol copolymer, the second layer at least consisting of a substantially crystalline propylene polymer, the said ethylene-vinylalcohol copolymer having a melting temperature at atmospheric pressure which is at most equal to and not more than 30K lower than the melting temperature at atmospheric pressure of the one of the substantially crystalline propylene polymers used having the highest melting temperature, and the laminate having been subjected to multi-axial stretching to a degree of at least twice in at least 2 directions at a temperature which at most equals the melting temperature of the one of the substantially crystalline propylene polymers used having the highest melting temperature and to a process for preparing such a laminate.
    Original languageEnglish
    Publication statusPublished - 1986

    Bibliographical note

    Patent US4579784 1986-04-01 ; EP0142183 (B1) 1985-05-22 ; AT29691T 1987-10-15 ; CA1225809 1987-08-25 ; DE3466191D 1987-10-22 ; DK161818C 1992-01-20 ; DK466684 1985-04-02 ; ES536361D 1986-06-01 ; ES8607825 1986-11-16 ; JP60092851 1985-05-24 ; NL8303379 1985-05-01 ; NO162952 1990-03-14 ; NO843929 1985-04-02

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