Patent US939764A successfully refreshed from Google Patents.
Patent US5458965A successfully refreshed from Google Patents.
US5458965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester laminated film
Assignee: Toyobo Co Ltd
•
Filing: 1993-09-02
•
Granted: 1995-10-17
•
Expires: 2013-09-02
Abstract
Abstract A polyester laminated film with excellent sealing ability is provided. The polyester laminated film comprises a base film of a polyester resin and a sealing film of a polyester composition, said sealing film being disposed on at least one side of said base film, wherein the sealing energy, which is measured when two pieces of said laminated films are joined together with the respective sealing films facing each other, is 300 g.cm/15 mm or more.
Inventors
- 👤 Yasuo Yoshinaka
- 👤 Katsuhiko Nose
- 👤 Yoshinori Takegawa
- 👤 Norimi Tabota
- 👤 Akito Hamano
- 👤 Katsuaki Kuze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:59
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/36; B32B7/00; B32B7/04; B32B7/12; B32B27/06; B32B27/08; B32B27/18; B32B27/20; B32B37/00; B32B37/14; B32B37/15; B32B37/153; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; B32B2250/00; B32B2250/24; B32B2250/244; B32B2264/00; B32B2264/02; B32B2264/0214; B32B2264/0228; B32B2264/0235; B32B2264/025; B32B2264/10; B32B2264/102; B32B2264/104; B32B2307/00; B32B2307/30; B32B2307/31; B32B2307/70; B32B2307/748; B32B2367/00; B32B2439/00; B32B2439/70; B32B2457/00; B32B2457/04; B32B2553/00; C08J2367/00; C08J2367/02; C08J2467/00; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/25; Y10T428/31504; Y10T428/31786; Y10T428/31797
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
213 words
A polyester laminated film comprising a base film of a polyester resin and a sealing film of a polyester composition, said sealing film being disposed on at least one side of said base film, wherein the sealing energy, which is measured when two pieces of said laminated films are joined together with the respective sealing films facing each other, is 400 g.cm/15 mm or more, wherein said sealing film is a heat-sealing film and wherein the starting temperature of thermal molecular motion in said polyester composition is in the range of 30° to 65° C., wherein said polyester composition comprises: a polyester resin A containing at least one diol component of the formula: ##STR3## wherein R 1 and R 2 are, independently, hydrogen or alkyl containing 1 to 6 carbon atoms, with the proviso that at least one of R 1 and R 2 is alkyl containing 1 to 6 carbon atoms, and wherein n and m are, independently, integers of 1 to 6; and a polyester resin B containing at least one dicarboxylic acid component of the formula: HOOC--(CH.sub.2).sub.p 13 COOH (IIa) wherein p is an integer of 4 to 20; and at least one glycol component of the formula: HO--(CH.sub.2).sub.q --OH (IIb) wherein q is an integer of 4 to 10.
Claim 2
Dependent Claim
213 words
A polyester laminated film comprising a base film of a polyester resin and a sealing film of a polyester composition, said sealing film being disposed on at least one side of said base film, wherein the sealing energy, which is measured when two pieces of said laminated films are joined together with the respective sealing films facing each other, is 400 g.cm/15 mm or more, wherein said sealing film is a heat-sealing film and wherein the starting temperature of thermal molecular motion in said polyester composition is in the range of 30° to 65° C., wherein said polyester composition comprises: a polyester resin A containing at least one diol component of the formula: ##STR3## wherein R 1 and R 2 are, independently, hydrogen or alkyl containing 1 to 6 carbon atoms, with the proviso that at least one of R 1 and R 2 is alkyl containing 1 to 6 carbon atoms, and wherein n and m are, independently, integers of 1 to 6; and a polyester resin B containing at least one dicarboxylic acid component of the formula: HOOC--(CH.sub.2).sub.p 13 COOH (IIa) wherein p is an integer of 4 to 20; and at least one glycol component of the formula: HO--(CH.sub.2).sub.q --OH (IIb) wherein q is an integer of 4 to 10.
Claim 3
Dependent Claim
21 words
A polyester laminated film according to claim 1, wherein said starting temperature is in the range of 45° to 60° C.
Claim 4
Dependent Claim
47 words
A polyester laminated film according to claim 1, wherein said polyester composition comprises a polyester resin having a starting temperature of thermal molecular motion higher than 50° C. and a polyester resin having a starting temperature of thermal molecular motion lower than or equal to 50° C.
Claim 5
Dependent Claim
37 words
A polyester laminated film according to claim 1, wherein the ratio of stress under 10% stretch to stress under 50% stretch of at least one of said base films and said sealing film is 1.2 or less.
Claim 6
Dependent Claim
26 words
A polyester laminated film according to claim 1, wherein said polyester composition comprises a polyester resin containing at least two dicarboxylic acid components as constituent monomers.
Claim 7
Dependent Claim
25 words
A polyester laminated film according to claim 1, wherein said polyester composition comprises a polyester resin containing at least two diol components as constituent monomers.
Claim 8
Dependent Claim
39 words
A polyester laminated film according to claim 1, wherein said polyester composition comprises a polyester resin containing at least two dicarboxylic acid components as constituent monomers and a polyester resin containing at least two diol components as constituent monomers.
Claim 9
Dependent Claim
27 words
A polyester laminated film according to claim 1, wherein said polyester composition further comprises a polyester resin containing at least one lactone component as a constituent monomer.
Claim 10
Dependent Claim
17 words
A polyester laminated film according to claim 1, wherein said polyester composition further comprises a lubricating agent.
Claim 11
Dependent Claim
25 words
A polyester laminated film according to claim 1, wherein said heat-sealing film is a layered structure composed of at least two kinds of polyester compositions.
Claim 12
Dependent Claim
20 words
A polyester laminated film according to claim 1, wherein said base film is composed of a homopolyester or a copolyester.
Claim 13
Dependent Claim
30 words
A polyester laminated film according to claim 1, wherein said base film is composed of at least two kinds of resins selected from the group consisting of homopolyesters and copolyesters.
Claim 14
Dependent Claim
44 words
A polyester laminated film according to claim 1, wherein said sealing film is disposed on one side of said base film and a deposited layer of metal or metal oxide or an adhesive layer is disposed on the other side of said base film.
Claim 15
Dependent Claim
23 words
A polyester laminated film according to claim 1, wherein said polyester composition further comprises at least one of inorganic particles and organic particles.
Claim 16
Dependent Claim
45 words
A polyester laminated film according to claim 14, wherein said particles have a mean diameter smaller than the thickness of said heat-sealing layer, said particles are present in an amount of 0.01% to 5% by weight based on the total weight of said polyester composition.
Claim 17
Dependent Claim
58 words
A polyester laminated film according to claim 14, wherein the variation in the diameter of said particles observed by scanning electron microscopy is 25% or less, and the ratio of the mean projected cross-sectional area of said particles to the mean area of a circumscribed circle of said particles observed by scanning electron microscopy is 60% or more.
References Cited (Backward Citations)
GB915779A
Cited
GB1337331A
Cited
GB1428331A
Cited
GB1507876A
Cited
EP0035835A1
Cited
JPS56166065A
Cited
US4585687A
Cited
DE3414309A1
Cited
US4606976A
Cited
US4765999A
Cited
EP0291065A2
Cited
JPH02222845A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-10-16 | 1999-04-17 | 1999-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-10-16 | 2003-04-17 | 2003-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-10-16 | 2007-04-17 | 2007-10-17 | $7700.00 | Window Closed / Lapsed |