Patent US1174531A successfully refreshed from Google Patents.
Patent US4824699A successfully refreshed from Google Patents.
US4824699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for improved adhesion to semicrystalline polymer film
Assignee: 3M Co
•
Filing: 1987-08-21
•
Granted: 1989-04-25
•
Expires: 2007-08-21
Abstract
Abstract The present invention relates to a process for adhering coatings directly to semicrystalline polymer films. The surface of the film is first rendered quasi-amorphous. The quasi-amorphous surface is then either (a) washed with a solvent for amorphous polyester and then coated or (b) coated and heated to a temperature to recrystallize the surface of the polymer. These treatments improve both the consistency and strength of the bond between the coating and the polymer surface.
Inventors
- 👤 Edward J. Woo
- 👤 Elaine M. Yorkgitis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:38
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/02; B05D7/04; C; C08; C08J; C08J7/00; C08J7/02; G; G03; G03C; G03C1/00; G03C1/76; G03C1/795; G03C1/7954; G03C1/91; G03C1/915; B05D3/00; B05D3/02; B05D3/0254; B05D3/10; B05D3/101
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
122 words
A process for coating semicrystalline polymer surfaces which comprises first providing a semicrystalline polymer surface with areas of at least 5 nm in thickness of the same semicrystalline polymer in a quasi-amorphous state and then either: (a) applying a solvent capable of swelling or dissolving the amorphous form of said semicrystalline polymer to said surface, heating said surface to a temperature sufficient to enable at least some of said quasi-amorphous areas to recrystallize while a coating or laminable surface is being applied to or is in contact with said polymer surface, and/or (b) applying said coating or laminable surface to said surface and subsequently heating said surface to a temperature sufficient to enable at least some of said quasi-amorphous areas to crystallize.
Claim 2
Dependent Claim
122 words
A process for coating semicrystalline polymer surfaces which comprises first providing a semicrystalline polymer surface with areas of at least 5 nm in thickness of the same semicrystalline polymer in a quasi-amorphous state and then either: (a) applying a solvent capable of swelling or dissolving the amorphous form of said semicrystalline polymer to said surface, heating said surface to a temperature sufficient to enable at least some of said quasi-amorphous areas to recrystallize while a coating or laminable surface is being applied to or is in contact with said polymer surface, and/or (b) applying said coating or laminable surface to said surface and subsequently heating said surface to a temperature sufficient to enable at least some of said quasi-amorphous areas to crystallize.
Claim 3
Dependent Claim
32 words
The process of claim 1 wherein said quasi-amorphous areas comprise at least 90% of said surface an said heating is done after contacting said quasi-amorphous surface with said coating or laminable surface.
Claim 4
Dependent Claim
11 words
The process of claim 1 wherein said polymer is a polyester.
Claim 5
Dependent Claim
22 words
The process of claim 2 wherein said polymer is a polyester and said coating is applied after applying and drying said solvent.
Claim 6
Dependent Claim
10 words
The process of claim 3 wherein said polyester is polyethyleneterephthalate.
Claim 7
Dependent Claim
10 words
The process of claim 4 wherein said polyester is polyethleneterephthalate.
Claim 8
Dependent Claim
44 words
The process of claim 1 wherein a coating is applied and said coating is an organic composition applied to said surface with a solvent for said composition which is also a solvent capable of swelling or dissolving the amorphous form of said semicrystalline polymer.
Claim 9
Dependent Claim
44 words
The process of claim 2 wherein a coating is applied and said coating is an organic composition applied to said surface with a solvent for said composition which is also a solvent capable of swelling or dissolving the amorphous form of said semicrystalline polymer.
Claim 10
Dependent Claim
44 words
The process of claim 5 wherein a coating is applied and said coating is an organic composition applied to said surface with a solvent for said composition which is also a solvent capable of swelling or dissolving the amorphous form of said semicrystalline polymer.
Claim 11
Dependent Claim
44 words
The process of claim 6 wherein a coating is applied and said coating is an organic composition applied to said surface with a solvent for said composition which is also a solvent capable of swelling or dissolving the amorphous form of said semicrystalline polymer.
Claim 12
Dependent Claim
126 words
A process for coating semicrystalline polymer surfaces which comprises first providing a semicrystalline polymer having on at least one surface thereof areas having thickness of 20 to 50 nm of the same polymer in a quasiamorphous state which has an optical density in the absence of dyes or pigments which differ from that of the semicrystalline form of the polymer by less than 0.1 in the visible regions of the electromagnetic spectrum and then either: (a) contacting said surface with a solvent capable of swelling or dissolving the amorphous form of said semicrystalline polymer and subsequently applying a coating to said surface, or (b) applying said coating to said surface and subsequently heating said surface to a temperature sufficient to enable said quasi-amorphous areas to crystallize.
Claim 13
Dependent Claim
126 words
A process for coating semicrystalline polymer surfaces which comprises first providing a semicrystalline polymer having on at least one surface thereof areas having thickness of 20 to 50 nm of the same polymer in a quasiamorphous state which has an optical density in the absence of dyes or pigments which differ from that of the semicrystalline form of the polymer by less than 0.1 in the visible regions of the electromagnetic spectrum and then either: (a) contacting said surface with a solvent capable of swelling or dissolving the amorphous form of said semicrystalline polymer and subsequently applying a coating to said surface, or (b) applying said coating to said surface and subsequently heating said surface to a temperature sufficient to enable said quasi-amorphous areas to crystallize.
Claim 14
Dependent Claim
16 words
The process of claim 11 wherein said quasiamorphous areas comprise at least 90% of said surface.
Claim 15
Dependent Claim
11 words
The process of claim 12 wherein said polymer is a polyester.
Claim 16
Dependent Claim
10 words
The process of claim 13 wherein said polyester is polyethyleneterephthalate.
Claim 17
Dependent Claim
22 words
The process of claim 14 wherein said coating is an organic composition applied to said surface with a solvent for said composition.
Claim 18
Dependent Claim
26 words
The process of claim 1 wherein the atom/atom, oxygen/carbon ratio of the quasi-amorphous areas is the same or less than that ratio in the semicrystalline polymer.
Claim 19
Dependent Claim
26 words
The process of claim 11 wherein the atom/atom, oxygen/carbon ratio of the quasi-amorphous areas is the same or less than that ratio in the semicrystalline polymer.
Claim 20
Dependent Claim
10 words
The process of claim 1 wherein said solvent is acetone.
Claim 21
Dependent Claim
10 words
The process of claim 2 wherein said solvent is acetone.
Claim 22
Dependent Claim
10 words
The process of claim 11 wherein said solvent is acetone.
Claim 23
Dependent Claim
118 words
A process for laminating semicrystalline polymer surfaces which comprises first providing a semicrystalline polymer surface with areas of at least 5 nm in thickness of the same semicrystalline polymer in a quasi-amorphous state and then either: (a) applying a solvent capable of swelling or dissolving the amorphous form of said semicrystalline polymer to said surface, heating said surface to a temperature sufficient to enable at least some of said quasi-amorphous areas to recrystallize while a laminable surface is being applied to or is in contact with said polymer surface, or (b) applying said laminable surface to said surface and subsequently heating said surface to a temperature sufficient to enable at least some of said quasi-amorphous areas to crystallize.
Claim 24
Dependent Claim
118 words
A process for laminating semicrystalline polymer surfaces which comprises first providing a semicrystalline polymer surface with areas of at least 5 nm in thickness of the same semicrystalline polymer in a quasi-amorphous state and then either: (a) applying a solvent capable of swelling or dissolving the amorphous form of said semicrystalline polymer to said surface, heating said surface to a temperature sufficient to enable at least some of said quasi-amorphous areas to recrystallize while a laminable surface is being applied to or is in contact with said polymer surface, or (b) applying said laminable surface to said surface and subsequently heating said surface to a temperature sufficient to enable at least some of said quasi-amorphous areas to crystallize.
Claim 25
Dependent Claim
30 words
The process of claim 21 wherein said quasi-amorphous areas comprise at least 90% of said surface and said heating is done after contacting said quasiamorphous surface with said laminable surface.
Claim 26
Dependent Claim
11 words
The process of claim 1 wherein said polymer is a polyester.
Claim 27
Dependent Claim
23 words
The process of claim 22 wherein said polymer is a polyester and said laminable surface is applied after applying and drying said solvent.
Claim 28
Dependent Claim
10 words
The process of claim 23 wherein said polyester is polyethyleneterephthalate.
Claim 29
Dependent Claim
10 words
The process of claim 24 wherein said polyester is polyethyleneterephthalate.
References Cited (Backward Citations)
CA699915A
Cited
US2511472A
Cited
GB760611A
Cited
US2876187A
Cited
US3081485A
Cited
US3337364A
Cited
US3574070A
Cited
US3607354A
Cited
US3978341A
Cited
GB1579002A
Cited
US4417948A
Cited
US4568632A
Cited
JPS5982380A
Cited
JPS59101937A
Cited
JPS59101938A
Cited
US4414059A
Cited
US4710563A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-24 | 1992-10-24 | 1993-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-24 | 1996-10-24 | 1997-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-24 | 2000-10-24 | 2001-04-25 | $7700.00 | Window Closed / Lapsed |