US4522887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated film of biaxially oriented polypropylene and an olefin polymer film
Assignee: Toray Industries Inc
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Filing: 1984-03-19
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Granted: 1985-06-11
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Expires: 2004-03-19
Abstract
Abstract This invention provides a laminated film prepared by laminating at least one surface of a biaxially oriented polypropylene film (A) with an olefin polymer film (B) containing from 10 to 50% by weight of an ethylene component and the balance mainly comprising a propylene component, said olefin polymer film (B) having at least three peaks in the melting curve within the range of from 120° to 165° C. and a surface roughness Ra of from 0.2 to 1.5μ, said laminated film being excellent in delustering quality, light transmittance, retention of delustering quality under heat and pressure, adhesion to metallized layers and to paper. This invention further provides a laminated film prepared by laminating a polymer film (C) containing from 1 to 40% by weight of an ethylene component and the balance mainly comprising a propylene component and having one or two melting peaks within the range of from 100° to 165° C. and a surface roughness Ra of below 0.15μ, in the order of arrangement of (B)/(A)/(C), said laminated film being capable of readily providing a film having a mat finish metallic luster or a mirror finish metallic luster.
Inventors
- 👤 Mamoru Koebisu
- 👤 Masayuki Shinzawa
- 👤 Masatsugi Murakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:45
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/32; B32B27/06; B32B27/10; B29; B29K; B29K2995/00; B29K2995/0018; B29K2995/0022; B29K2995/0037; B29K2995/0072; B32B2255/00; B32B2255/20; B32B2255/205; B32B2307/00; B32B2307/50; B32B2307/514; B32B2307/518; B32B2323/00; B32B2323/10; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31573; Y10T428/31576; Y10T428/31591; Y10T428/31605; Y10T428/31678; Y10T428/31692; Y10T428/31703; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
75 words
A laminated film comprising a biaxially oriented polypropylene film (A) having an olefin polymer film (B) laminated on at least one surface thereof, said olefin polymer film (B) comprising 10 to 50% by weight of an ethylene component, the balance mainly comprising a propylene component, and having at least three peaks in the melting curve within the range of from 120° to 165° C. and a surface roughness Ra of from 0.2 to 1.5 μ.
Claim 2
Dependent Claim
75 words
A laminated film comprising a biaxially oriented polypropylene film (A) having an olefin polymer film (B) laminated on at least one surface thereof, said olefin polymer film (B) comprising 10 to 50% by weight of an ethylene component, the balance mainly comprising a propylene component, and having at least three peaks in the melting curve within the range of from 120° to 165° C. and a surface roughness Ra of from 0.2 to 1.5 μ.
Claim 3
Dependent Claim
30 words
A laminated film as set forth in claim 1, wherein said polymer film (B) has from three to eight melting peaks within the range of from 120° to 165° C.
Claim 4
Dependent Claim
48 words
A laminated film as set forth in claim 1, wherein said olefin polymer film (B) has at least one melting peak within each of the three ranges of from 120° to 130° C. not inclusive, from 130° to 150° C. not inclusive and from 150° to 165° C.
Claim 5
Dependent Claim
120 words
A laminated film comprising a biaxially oriented polypropylene film (A), an olefin polymer film (B) comprising 10 to 50% by weight of an ethylene component, the balance mainly comprising a propylene component, and having at least three peaks in the melting curve within the range of from 120° to 165° C. and a surface roughness Ra of from 0.2 to 1.5 μ, and a polymer film (C) comprising 1 to 40% by weight of an ethylene component, the balance mainly comprising a propylene component, and having one peak or two in the melting curve within the range of from 100° to 165° C. and a surface roughness Ra below 0.15 μ, said laminated film having the laminate structure of (B)/(A)/(C).
Claim 6
Dependent Claim
120 words
A laminated film comprising a biaxially oriented polypropylene film (A), an olefin polymer film (B) comprising 10 to 50% by weight of an ethylene component, the balance mainly comprising a propylene component, and having at least three peaks in the melting curve within the range of from 120° to 165° C. and a surface roughness Ra of from 0.2 to 1.5 μ, and a polymer film (C) comprising 1 to 40% by weight of an ethylene component, the balance mainly comprising a propylene component, and having one peak or two in the melting curve within the range of from 100° to 165° C. and a surface roughness Ra below 0.15 μ, said laminated film having the laminate structure of (B)/(A)/(C).
Claim 7
Dependent Claim
23 words
A laminated film as set forth in claim 4, wherein said polymer film (C) has a surface roughness Ra of below 0.1 μ.
Claim 8
Dependent Claim
33 words
A laminated film as set forth in claim 4, wherein said polymer film (C) contains from 2 to 30% by weight of an ethylene component and the balance mainly comprising a propylene component.
Claim 9
Dependent Claim
33 words
A laminated film as set forth in claim 4, wherein said polymer film (B) has from three to eight peaks in the melting curve within the range of from 120° to 165° C.
Claim 10
Dependent Claim
47 words
A laminated film as set forth in claim 4, wherein said polymer film (B) has at least one melting peak within each of the three ranges of from 120° to 130° C. not inclusive, from 130° to 150° C. not inclusive and from 150° to 165° C.
Claim 11
Dependent Claim
43 words
A laminated film as set forth in claim 1, which has the laminate structure of (B)/(A) of said biaxially oriented polypropylene film (A) and said olefin polymer film (B), and a metallized layer applied on the outer surface of the polymer film (B).
Claim 12
Dependent Claim
47 words
A laminated film as set forth in claim 1, which has the laminate structure of (B)/(A)/(B) of said biaxially oriented polypropylene film (A) and said olefin polymer film (B), and a metallized layer applied on the outer surface of either or both of the polymer films (B).
Claim 13
Dependent Claim
54 words
A laminated film as set forth in claim 1, which has the laminate structure of (B)/(A) of said biaxially oriented polypropylene film (A) and said olefin polymer film (B), a metallized layer applied on the outer surface of the polymer film (B), and a paper laminated on the outer surface of said metallized layer.
Claim 14
Dependent Claim
55 words
A laminated film as set forth in claim 1, which has the laminate structure of (B)/(A)/(B) of said biaxially oriented polypropylene film (A) and said olefin polymer film (B), a metallized layer applied on the outer surface of either or both of the olefin polymer films (B), and a paper laminated on either surface thereof.
Claim 15
Dependent Claim
44 words
A laminated film as set forth in claim 4, which has the laminate structure of (B)/(A)/(C) of said biaxially oriented polypropylene film (A), said olefin polymer film (B) and said polymer film (C), and a metallized layer applied on at least one surface thereof.
Claim 16
Dependent Claim
19 words
A laminated film as set forth in claim 13, which further has a paper laminated on either surface thereof.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-10 | 1988-12-10 | 1989-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-10 | 1992-12-10 | 1993-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-10 | 1996-12-10 | 1997-06-11 | $7700.00 | Window Closed / Lapsed |