Patent EP0096841A1 successfully refreshed from Google Patents.
EP0096841A1
Expired / Lapsed
EP
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Adhesive tapes having a film backing of polypropylene or other olefinic polymer or copolymer
Assignee: Manuli Autoadesivi SpA
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Filing: 1983-06-08
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Granted: —
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Expires: 2003-06-08
Abstract
Abstract For pressure sensitive adhesive tapes having a film backing of polypropylene or other olefinic polymer or copolymer, the treatment of the non adhesive side before the release coat is applied causes the unwinding noise of the tape to be essentially reduced.
Inventors
- 👤 Graziano Galli
- 👤 Felice Pina
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 17:24
CPC Classifications
C; C09; C09J; C09J7/00; C09J7/20; C09J7/22; C09J7/24; C09J7/241; Y; Y10; Y10S; Y10S428/00; Y10S428/906; Y10T; Y10T428/00; Y10T428/14; Y10T428/1452; Y10T428/28; Y10T428/2848
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
74 words
Adhesive tape with reduced unwinding noise of the type comprising a film backing of polypropilene or other olefinic polymer or copolymers, the adhering surface of said backing being coated with a primer and an adhesive layer, and being further coated on the back or non adhesive surface with a release layer, characterized in that the back side of said film below said release coat has a surface tension not lower than 33 dynes/c m.
Claim 2
Dependent Claim
74 words
Adhesive tape with reduced unwinding noise of the type comprising a film backing of polypropilene or other olefinic polymer or copolymers, the adhering surface of said backing being coated with a primer and an adhesive layer, and being further coated on the back or non adhesive surface with a release layer, characterized in that the back side of said film below said release coat has a surface tension not lower than 33 dynes/c m.
Claim 3
Dependent Claim
53 words
A process for the manufacturing of an adhesive tape according to claim 1, characterized in that the back surface of said film backing is treated so as to bring the critical tension of the back surface of said backing to a value of at least 33 dynes/cm before said release coat is applied.
Claim 4
Dependent Claim
33 words
A process according to claim 2, characterized in that said treatment of the back surface is carried out by means of a flame treatment or of an electric discharge with a corona effect.
References Cited (Backward Citations)
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