Stock material or miscellaneous articles – Hollow or container type article – Polymer or resin containing
Patent
1987-12-21
1990-06-05
Buffalow, Edith
Stock material or miscellaneous articles
Hollow or container type article
Polymer or resin containing
428516, 428910, 264544, 5263482, B29D 2200
Patent
active
049313258
ABSTRACT:
This invention relates to composite manufactured articles formed by a set of uniaxially oriented isotatic polypropylene films, having a resistance to delamination of at least 0.4 kg/cm are prepared by heating under pressure a plurality of isotatic polypropylene films superimposed to each other and separated from each other by a non oriented polypropylene films. The oriented films show an orientation of the crystalline phase such as to produce X-ray scattering angles .DELTA..times. equal to or lower than 10.degree.. The non oriented film show an orientation of the crystalline phase such as to produce X-ray scattering angles higher than 20.degree., at a temperature between a temperature equal to or higher than the melting temperature, measured in non restrain conditions, of the non oriented film and a temperature lower than the melting temperature, measured in restrained conditions, of the oriented films.
Attalla Giancarlo
Corradini Paolo
De Rosa Claudio
Guerra Gaetano
Nicolais Luigi
Buffalow Edith
Montedison S.p.A.
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