US5599602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double-sided pressure-sensitive adhesive tape and method of making
Assignee: 3M Co
•
Filing: 1995-09-26
•
Granted: 1997-02-04
•
Expires: 2015-09-26
Abstract
Abstract A unified, composite tape structure comprising two outer pressure-sensitive adhesive layers and a backing joined via melt processing. At least one of the backing and two outer adhesive layers is not mutually coextensive. A method of making the tape comprising the use of melt processing is also disclosed.
Inventors
- 👤 William K. Leonard
- 👤 Kirit C. Mody
- 👤 Richard J. Rolando
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:17
CPC Classifications
C; C09; C09J; C09J7/00; C09J7/20; B; B29; B29C; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/12; B29C48/25; B29C48/30; B29C48/35; B29C48/88; B29C48/911; B29C48/9135; B29C48/914; B29C48/915; B29C48/9165; B29C48/917; B29C48/9175; Y; Y10; Y10T; Y10T428/00; Y10T428/18; Y10T428/183; Y10T428/187; Y10T428/24; Y10T428/24479; Y10T428/2457; Y10T428/24587; Y10T428/24942; Y10T428/2495; Y10T428/24959; Y10T428/249921; Y10T428/249953; Y10T428/249982; Y10T428/249983; Y10T428/28
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
67 words
A composite tape comprising a backing with first and second major surfaces, a first layer of normally tacky pressure-sensitive adhesive on said first major surface, and a second layer of normally tacky pressure-sensitive adhesive on said second major surface, wherein said adhesive layers and said backing were simultaneously coextruded and at least one of said first layer of adhesive and said second layer of adhesive is non-coextensive.
Claim 2
Dependent Claim
67 words
A composite tape comprising a backing with first and second major surfaces, a first layer of normally tacky pressure-sensitive adhesive on said first major surface, and a second layer of normally tacky pressure-sensitive adhesive on said second major surface, wherein said adhesive layers and said backing were simultaneously coextruded and at least one of said first layer of adhesive and said second layer of adhesive is non-coextensive.
Claim 3
Dependent Claim
16 words
The composite tape of claim 1 wherein said adhesive layers and backing are essentially permanently joined.
Claim 4
Dependent Claim
28 words
The composite tape of claim 1 wherein said pressure-sensitive adhesive layers are selected from the group consisting of random copolymer adhesives, block copolymer adhesives, and natural rubber adhesives.
Claim 5
Dependent Claim
16 words
The composite tape of claim 1 wherein said composite was cooled before passing through a nip.
Claim 6
Dependent Claim
20 words
The composite tape of claim 1 wherein the compositions of said first and second adhesive layers are substantially the same.
Claim 7
Dependent Claim
21 words
The composite tape of claim 1 wherein the compositions of said first and second adhesive layers are not substantially the same.
Claim 8
Dependent Claim
11 words
The composite tape of claim 1 wherein said backing is discontinuous.
Claim 9
Dependent Claim
22 words
The composite tape of claim 1 further comprising an intermediate layer between said backing and at least one of said adhesive layers.
Claim 10
Dependent Claim
13 words
The composite tape of claim 1 wherein said backing is a foamed material.
Claim 11
Dependent Claim
19 words
The composite tape of claim 1 wherein said backing comprises a homopolymer, a copolymer, or a blend of polymers.
Claim 12
Dependent Claim
15 words
The composite tape of claim 1 wherein said backing is less than 15 micrometers thick.
Claim 13
Dependent Claim
15 words
The composite tape of claim 11 wherein said backing is at least 8 micrometers thick.
Claim 14
Dependent Claim
17 words
The composite tape of claim 1 wherein at least one of said adhesive layers has been cured.
Claim 15
Dependent Claim
45 words
The composite tape of claim 1 wherein said tape is a strip wound into roll form and wherein at least one of said first layer of adhesive and said second layer of adhesive is non-coextensive such that a discontinuity extends longitudinally parallel to said strip.
Claim 16
Dependent Claim
12 words
The composite tape of claim 1 wherein said backing comprises multiple layers.
Claim 17
Dependent Claim
16 words
The composite tape of claim 3 wherein said pressure-sensitive adhesive layers further include an inorganic material.
Claim 18
Dependent Claim
14 words
The composite tape of claim 11 wherein said backing further includes an inorganic material.
Claim 19
Dependent Claim
21 words
The composite tape of claim 1 comprising a plurality of adjoining adhesive layers on one or both sides of the backing.
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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) | 2000-02-04 | 2000-08-05 | 2001-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-02-04 | 2004-08-05 | 2005-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-02-04 | 2008-08-05 | 2009-02-04 | $7700.00 | Window Closed / Lapsed |