EP0031157A2
Expired / Lapsed
EP
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Manufactured articles from film forming polymers having an oriented structure, and process for the preparation of the same
Assignee: Montedison SpA
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Filing: 1980-12-19
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Granted: —
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Expires: 2000-12-19
Abstract
Abstract Manufactured articles with an oriented structure, in the form of plates, tubes and formed objects having a minimum thickness of at least 0.3 mm, obtained from film forming polymers susceptible to be oriented, by compression under heat of an assembly of oriented films superimposed on each other.
Inventors
- 👤 Millo Dr. Branchesi
- 👤 Luciano Rosati
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 02:08
CPC Classifications
B; B32; B32B; B32B37/00; B32B27/00; B32B27/06; B32B2307/00; B32B2307/50; B32B2307/514; B32B2307/70; B32B2307/702; B32B2307/704
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
34 words
1) Manufactured articles with an oriented structure in the form of plates, tubes and molded objects having a minimum thickness of at least 0.3 mm, obtained starting from oriented films of film forming polymers.
Claim 2
Dependent Claim
34 words
1) Manufactured articles with an oriented structure in the form of plates, tubes and molded objects having a minimum thickness of at least 0.3 mm, obtained starting from oriented films of film forming polymers.
Claim 3
Dependent Claim
16 words
2) Manufactured articles according to claim 1, characteriz ed in that they are obtained by thermopressing.
Claim 4
Dependent Claim
32 words
3) Manufactured articles according to either claim 1 or 2, characterized in that the film forming polymer is a cry stalline polymer selected from polyesters, polyamides; vinyl and vinylidene polymers and copolymers.
Claim 5
Dependent Claim
79 words
4) Process for obtaining the manufactured articles of claim 2, consisting in the thermopressing of an assembly of oriented films, superimposed on each other, at a pressu re comprised between 1 and 500 Kg/cm 2 , at a temperature lower than, but near the crystalline melt temperature, in the case of prevailingly crystalline polymers, while in the case of prevailingly amorphous polymers, at temperatures near the glass transition temperature and in any case not greater than the softening temperature.
Claim 6
Dependent Claim
47 words
5) Process according to claim 4, characterized in that the thermopressing for the preparation of the manufactured articles with a curved surface, is carried out without applying an external pressure but just exploiting the pressure resulting from the tensions of the thermoshrin kage of the single films.
References Cited (Backward Citations)
No citation records indexed.
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