US4769283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-sensitive adhesive tape
Assignee: 3M Co
•
Filing: 1986-01-31
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Granted: 1988-09-06
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Expires: 2006-01-31
Abstract
Abstract Normally tacky, pressure-sensitive adhesive tapes which are soft, pliable, conformable, and heat sealable are provided. The tapes have a backing of a substantially untensilized, tough, ductile film, the film being a blend of crystalline isotactic polypropylene and a compatible ethylene-based polymer, and a normally tacky, pressure-sensitive adhesive on one side of the film. The films have a longitudinal secant modulus of less than 3700 kg/cm 2 , a transverse secant modulus of less than 3700 kg/cm 2 , a longitudinal elastic modulus of less than 5200 kg/cm 2 , a transverse elastic modulus of less than 5200 kg/cm 2 , a longitudinal stiffness of less than 1.7, and a transverse stiffness of less than 3.0.
Inventors
- 👤 Alan J. Sipinen
- 👤 Del A. Kauss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:21
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; A; A61; A61F; A61F13/00; A61F13/15; A61F13/56; A61F13/58; C08L23/08; C08L23/0807; C08L23/0815; C08L23/0846; C08L23/0853; C08L23/10; C08L23/12; C08L23/14; C08L23/142; C08L23/16; C09; C09J; C09J7/00; C09J7/20; C09J7/22; C09J7/24; C09J7/241; C09J7/243; C09J7/30; C09J7/38; C08L2205/00; C08L2205/02; C08L2205/03; C08L2205/035; C08L23/06; C08L23/0869; C08L23/0876; C08L23/18; C08L23/20; Y; Y10; Y10T; Y10T428/00; Y10T428/14; Y10T428/1452; Y10T428/28; Y10T428/2839
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
118 words
A normally tacky, pressure-sensitive adhesive tape comprising a backing of a substantially untensilized, tough, ductile film, said film comprising a blend of crystalline isotactic polypropylene and a compatible ethylene-based polymer, said film having a longitudinal secant modulus of less than about 3700 kg/cm 2 , a transverse secant modulus of less than about 3700 kg/cm 2 , a longitudinal elastic modulus of less than about 5200 kg/cm 2 , a transverse elastic modulus of less than about 5200 kg/cm 2 , a longitudinal stiffness of less than about 1.7, and a transverse stiffness of less than about 3.0 and a normally tacky, pressure-sensitive adhesive on one side of the film and said tape being soft, pliable, and conformable.
Claim 2
Dependent Claim
118 words
A normally tacky, pressure-sensitive adhesive tape comprising a backing of a substantially untensilized, tough, ductile film, said film comprising a blend of crystalline isotactic polypropylene and a compatible ethylene-based polymer, said film having a longitudinal secant modulus of less than about 3700 kg/cm 2 , a transverse secant modulus of less than about 3700 kg/cm 2 , a longitudinal elastic modulus of less than about 5200 kg/cm 2 , a transverse elastic modulus of less than about 5200 kg/cm 2 , a longitudinal stiffness of less than about 1.7, and a transverse stiffness of less than about 3.0 and a normally tacky, pressure-sensitive adhesive on one side of the film and said tape being soft, pliable, and conformable.
Claim 3
Dependent Claim
52 words
The tape of claim 1 wherein said film is a blend of 20 to 85 weight percent crystalline isotactic polypropylene and 15 to 80 weight percent of a compatible ethylene-based polymer, except when the ethylene-based polymer is low density polyethylene, the ethylene-based polymer comprises 20 to 80 weight percent of the blend.
Claim 4
Dependent Claim
25 words
The tape of claim 1 wherein said film contains 40 to 60 weight percent ethylene-based polymer and 40 to 60 weight percent crystalline isotactic polypropylene.
Claim 5
Dependent Claim
79 words
The tape of claim 1 wherein said longitudinal secant modulus is between about 750 and 3000 kg/cm 2 , said transverse secant modulus is between about 650 and 3000 kg/cm 2 , said longitudinal elastic modulus is between about 1000 and 4000 kg/cm 2 , said transverse elastic modulus is between about 800 and 3500 kg/cm 2 , said longitudinal stiffness is between about 0.3 and 1.2 units, and said transverse stiffness is between about 0.3 and 2.2 units.
Claim 6
Dependent Claim
19 words
The tape of claim 1 wherein said ethylene-based polymer is a copolymer selected from ethylene-vinyl acetate and ethylene-acrylic acid.
Claim 7
Dependent Claim
13 words
The tape of claim 1 wherein said ethylene-based polymer is low density polyethylene.
Claim 8
Dependent Claim
13 words
The tape of claim 1 wherein said ethylene-based polymer comprises an ethylene-propylene-diene terpolymer.
Claim 9
Dependent Claim
28 words
The tape of claim 7 wherein said terpolymer contains 65 to 85 weight percent ethylene, 5 to 35 weight percent propylene, and 0.5 to 10 weight percent diene.
Claim 10
Dependent Claim
19 words
The tape of claim 7 wherein said diene is selected from dicyclopentadiene, 1,4-hexadiene, methylene norbonene, ethylidene norbornene, and cyclooctadiene.
Claim 11
Dependent Claim
15 words
The tape of claim 7 wherein said terpolymer is pre-blended with a compatible semicrystalline polymer.
Claim 12
Dependent Claim
13 words
The tape of claim 10 wherein said semicrystalline polymer is high density polyethylene.
Claim 13
Dependent Claim
14 words
The tape of claim 1 wherein said ethylene-based polymer is very low density polyethylene.
Claim 14
Dependent Claim
20 words
The tape of claim 12 wherein said film has a surface energy of less than about 40 erg/cm 2 .
Claim 15
Dependent Claim
13 words
The tape of claim 12 wherein the backside of said tape is uncoated.
Claim 16
Dependent Claim
127 words
A normally tacky, pressure-sensitive adhesive tape comprising a backing of a substantially untensilized tough, ductile film, said film comprising a blend of crystalline isotactic polypropylene and a compatible ethylene-based polymer, said film having a longitudinal secant modulus of less than about 3700 kg/cm 2 , a transverse secant modulus of less than about 3700 kg/cm 2 , a longitudinal elastic modulus of less than about 5200 kg/cm 2 , a transverse elastic modulus of less than about 5200 kg/cm 2 , a longitudinal stiffness of less than about 1.7 and a transverse stiffness of less than about 3.0, and a normally tacky, pressure-sensitive adhesive on one side of the film and the other side of the film being uncoated and said tape being soft, pliable, and conformable.
Claim 17
Dependent Claim
127 words
A normally tacky, pressure-sensitive adhesive tape comprising a backing of a substantially untensilized tough, ductile film, said film comprising a blend of crystalline isotactic polypropylene and a compatible ethylene-based polymer, said film having a longitudinal secant modulus of less than about 3700 kg/cm 2 , a transverse secant modulus of less than about 3700 kg/cm 2 , a longitudinal elastic modulus of less than about 5200 kg/cm 2 , a transverse elastic modulus of less than about 5200 kg/cm 2 , a longitudinal stiffness of less than about 1.7 and a transverse stiffness of less than about 3.0, and a normally tacky, pressure-sensitive adhesive on one side of the film and the other side of the film being uncoated and said tape being soft, pliable, and conformable.
Claim 18
Dependent Claim
132 words
A normally tacky, pressure-sensitive adhesive tape comprising a backing of a substantially untensilized, tough, ductile film, said film comprising a blend of crystalline isotactic polypropylene and a compatible ethylene-based polymer, said ethylene-based polymer being an ethylene-propylene-diene terpolymer pre-blended with a compatible semicrystalline polymer and said film having a longitudinal secant modulus of less than about 3700 kg/cm 2 , a transverse secant modulus of less than about 3700 kg/cm 2 , a longitudinal elastic modulus of less than about 5200 kg/cm 2 , a transverse elastic modulus of less than about 5200 kg/cm 2 , a longitudinal stiffness of less than about 1.7, and a transverse stiffness of less than about 3.0, and a normally tacky, pressure-sensitive adhesive on one side of the film and said tape being soft, pliable, and comformable.
Claim 19
Dependent Claim
132 words
A normally tacky, pressure-sensitive adhesive tape comprising a backing of a substantially untensilized, tough, ductile film, said film comprising a blend of crystalline isotactic polypropylene and a compatible ethylene-based polymer, said ethylene-based polymer being an ethylene-propylene-diene terpolymer pre-blended with a compatible semicrystalline polymer and said film having a longitudinal secant modulus of less than about 3700 kg/cm 2 , a transverse secant modulus of less than about 3700 kg/cm 2 , a longitudinal elastic modulus of less than about 5200 kg/cm 2 , a transverse elastic modulus of less than about 5200 kg/cm 2 , a longitudinal stiffness of less than about 1.7, and a transverse stiffness of less than about 3.0, and a normally tacky, pressure-sensitive adhesive on one side of the film and said tape being soft, pliable, and comformable.
Claim 20
Dependent Claim
129 words
A normally tacky, pressure-sensitive adhesive tape comprising a backing of a substantially untensilized, tough, ductible film, said film comprising a blend of crystalline isotactic polypropylene and very low density polyethylene, said film having a longitudinal secant modulus of less than about 3700 Kg/cm 2 , a transverse secant modulus of less than about 3700 Kg/cm 2 , a longitudinal elastic modulus of less than about 5200 Kg/cm 2 , a traverse elastic modulus of less than about 5200 Kg/cm 2 , a longitudinal stiffness of less than about 1.7, a traverse stiffness of less than about 3.0, and a surface energy of less than about 40 erg/cm 2 , and a normally tacky, pressure-sensitive adhesive on one side of the film and said tape being soft, pliable, and conformable.
Claim 21
Dependent Claim
129 words
A normally tacky, pressure-sensitive adhesive tape comprising a backing of a substantially untensilized, tough, ductible film, said film comprising a blend of crystalline isotactic polypropylene and very low density polyethylene, said film having a longitudinal secant modulus of less than about 3700 Kg/cm 2 , a transverse secant modulus of less than about 3700 Kg/cm 2 , a longitudinal elastic modulus of less than about 5200 Kg/cm 2 , a traverse elastic modulus of less than about 5200 Kg/cm 2 , a longitudinal stiffness of less than about 1.7, a traverse stiffness of less than about 3.0, and a surface energy of less than about 40 erg/cm 2 , and a normally tacky, pressure-sensitive adhesive on one side of the film and said tape being soft, pliable, and conformable.
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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) | 1991-09-06 | 1992-03-07 | 1992-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-06 | 1996-03-07 | 1996-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-06 | 2000-03-07 | 2000-09-06 | $7700.00 | Window Closed / Lapsed |