US5198301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible and conformable ionomeric resin based films
Assignee: 3M Co
•
Filing: 1991-05-17
•
Granted: 1993-03-30
•
Expires: 2011-05-17
Abstract
Abstract Films are provided made from ionomeric polymer resins with 2-40% by weight of a filler material, where the film has a thickness between 0.050 and 0.127 mm. These films are highly flexible and conformable. Adhesive composites comprising these films are also provided.
Inventors
- 👤 Patrick J. Hager
- 👤 Del A. Kauss
- 👤 Janet T. Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:27
CPC Classifications
B; B44; B44C; B44C5/00; B44C5/04; B44C5/0446; C; C08; C08K; C08K3/00; C08K3/01; C08K3/013; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/254; Y10T428/256; Y10T428/28; Y10T428/2852; Y10T428/2874
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
89 words
A flexible and conformable film comprising: a) about 60-98% by weight ionomer resin that is a copolymer of ethylene and acrylic acid or methacrylic acid neutralized by a metal cation, said resin having a melt flow index greater than about 10 and b) about 2-40% by weight of a filler material, wherein said film has a thickness of between 0.050 and 0.127 mm wherein said film is substantially free of migrating plasticizers or leachable additives and wherein said film has an Elmendorf tear strength in excess of 280 grams/ply.
Claim 2
Dependent Claim
89 words
A flexible and conformable film comprising: a) about 60-98% by weight ionomer resin that is a copolymer of ethylene and acrylic acid or methacrylic acid neutralized by a metal cation, said resin having a melt flow index greater than about 10 and b) about 2-40% by weight of a filler material, wherein said film has a thickness of between 0.050 and 0.127 mm wherein said film is substantially free of migrating plasticizers or leachable additives and wherein said film has an Elmendorf tear strength in excess of 280 grams/ply.
Claim 3
Dependent Claim
17 words
The film of claim 1, wherein said ionomeric resin is a copolymer of ethylene and methacrylic acid.
Claim 4
Dependent Claim
20 words
The film of claim 1, wherein said metal cation is selected from the group consisting of zinc, magnesium and sodium.
Claim 5
Dependent Claim
11 words
The film of claim 1, wherein said metal cation is zinc.
Claim 6
Dependent Claim
23 words
The film of claim 1, wherein said ionomer resin is a copolymer of ethylene with methacrylic acid that has been neutralized with zinc.
Claim 7
Dependent Claim
19 words
The film of claim 1, wherein said ionomer resin has a melt flow index of at least about 12.
Claim 8
Dependent Claim
19 words
The film of claim 1, wherein said film comprises between about 5 and 25% by weight of filler material.
Claim 9
Dependent Claim
19 words
The film of claim 1, wherein said film comprises between about 5 and 15% by weight of filler material.
Claim 10
Dependent Claim
12 words
The film of claim 1, wherein said filler material comprises a pigment.
Claim 11
Dependent Claim
33 words
A film of claim 1, wherein said filler material comprises a polymer selected from the group consisting of low density polyethylene polymers, high density polyethylene polymers, polypropylene polymers, polyoxyethylene copolymers and polypropylene/ethylene copolymers.
Claim 12
Dependent Claim
13 words
The film of claim 1, wherein said filler material comprises a synthetic wax.
Claim 13
Dependent Claim
15 words
The film of claim 1 wherein said film is about 0.064 to 0.102 mm thick.
Claim 14
Dependent Claim
15 words
The film of claim 1 wherein said film is about 0.076 to 0.089 mm thick.
Claim 15
Dependent Claim
17 words
The film of claim 1, further comprising a layer of adhesive on one side of said film.
Claim 16
Dependent Claim
20 words
The film of claim 14, wherein said adhesive is a pressure-sensitive adhesive for permanantly adhering said film to a substrate.
Claim 17
Dependent Claim
20 words
The film of claim 14, wherein said adhesive is a pressure-sensitive adhesive for repositionably adhering said film to a substrate.
Claim 18
Dependent Claim
48 words
The film of claim 16, wherein said adhesive comprises a) between about 60-100% by weight of hollow, polymeric, acrylate, inherently tacky, infusible, solvent-insoluble, solvent-dispersible, elastomeric pressure-sensitive adhesive microspheres having a diameter of at least 1 micrometer, and b) between about 0-40% by weight of a non-spherical polyacrylate adhesive.
Claim 19
Dependent Claim
18 words
The film of claim 17, wherein said non-spherical polyacrylate adhesive is a copolymer of butyl acrylate and acrylonitrile.
Claim 20
Dependent Claim
24 words
The film of claim 17, wherein said non-spherical polyacrylate adhesive is present in the repositionable adhesive at an amount of about 10-35% by weight.
Claim 21
Dependent Claim
31 words
The film of claim 1, wherein said film exhibits a Long-Term Elastic Recovery of no more than 20% after 40 hours when 0.1 mm thick and initially held for 10 minutes.
Claim 22
Dependent Claim
24 words
The film of claim 1, wherein said film has a hysteresis value of more than 0.01 (MJ/m 3 ) under the 5% hysteresis test.
Claim 23
Dependent Claim
24 words
The film of claim 1, wherein said film has a machine direction Elmendorf tear strength of greater than 300 g/ply when 0.076 mm thick.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-03-29 | 1996-09-28 | 1997-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-03-29 | 2000-09-28 | 2001-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-03-29 | 2004-09-28 | 2005-03-30 | $7700.00 | Window Closed / Lapsed |