EP0178282A2
Expired / Lapsed
EP
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Expanded polypropylene films and process for preparing them
Assignee: Montefina SA
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Filing: 1985-10-07
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Granted: —
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Expires: 2005-10-07
Abstract
Abstract The expanded polypropylene films have a uniform density d comprised between 4.25.10 -6 and 6.50.10 -6 N.mm -3 , a crystallization temperature comprised between 115 and 135°C, and an elastic modulus Me expressed in N.mm -2 such that the ratio Me/d is comprised between 1.6.10 8 and 2.0.10 8 mm.
Inventors
- 👤 Jean-Noel M. Bertrand
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 17:41
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/0014; C08J2323/00; C08J2323/02; C08J2323/10; C08J2323/12; Y; Y10; Y10S; Y10S521/00; Y10S521/908
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
49 words
Expanded polypropylene films, characterized by a uniform density d comprised between 4.25.10 -6 and 6.50.10 -6 N.mm -3 , a crystallization temperature comprised between 115 and 135°C, and an elastic modulus Me expressed in N.mm -2 such that the ratio Me/d is comprised between 1.6.10 8 and 2.0.10 mm.
Claim 2
Dependent Claim
49 words
Expanded polypropylene films, characterized by a uniform density d comprised between 4.25.10 -6 and 6.50.10 -6 N.mm -3 , a crystallization temperature comprised between 115 and 135°C, and an elastic modulus Me expressed in N.mm -2 such that the ratio Me/d is comprised between 1.6.10 8 and 2.0.10 mm.
Claim 3
Dependent Claim
15 words
Films according to Claim 1, characterized by a crystallization temperature comprised between 115 and 130°C.
Claim 4
Dependent Claim
23 words
Films according to any of Claims 1 or 2, characterized by a density comprised between 4.5.10 -6 and 4.7.10 -6 N.mm -3 .
Claim 5
Dependent Claim
22 words
Films according to Claim 3, characterized by a tensile strength at 5 % elongation comprised between 10.75 and 11.25 N.mm -2 .
Claim 6
Dependent Claim
21 words
Films according to Claim 3, characterized by a tensile strength at break comprised between 11.0 and 11.5 N .mm -2 .
References Cited (Backward Citations)
No citation records indexed.
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