US6110552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Release liners for pressure sensitive adhesive labels
Assignee: Flexcon Co Inc
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Filing: 1998-12-09
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Granted: 2000-08-29
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Expires: 2018-12-09
Abstract
Abstract A release liner for use with face stocks for pressure sensitive labels, tapes, decals and other products formed from sheet and roll stock. A filled polymer is laminated to one side of a paper web. An extrudate is laminated to the other side of the paper substrate to form a release liner. The filled polymer has paper-like properties and replaces paper tissue back liners.
Inventors
- 👤 James M. Casey
- 👤 David A. Kitch
- 👤 John M. Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:41
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/10; B32B27/18; B32B27/20; B32B27/32; C; C09; C09J; C09J7/00; C09J7/40; C09J7/403; D; D21; D21H; D21H27/00; D21H27/001; B32B2307/00; B32B2307/50; B32B2307/538; B32B2307/70; B32B2307/746; B32B2323/00; B32B2323/04; B32B2323/10; C09J2203/00; C09J2203/334; C09J2400/00; C09J2400/20; C09J2400/28; C09J2400/283; C09J2423/00; C09J2423/005; D21H19/00; D21H19/36; D21H19/80; D21H19/82; D21H19/84; D21H23/00; D21H23/02; D21H23/22; D21H23/46; Y; Y10; Y10T; Y10T428/00; Y10T428/14; Y10T428/1476; Y10T428/24; Y10T428/24802; Y10T428/24851; Y10T428/2486; Y10T428/28; Y10T428/2839; Y10T428/2848; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31935; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
115 words
A composite release liner for use with label face stock, said release liner comprising: a paper substrate having first and second sides; and a paper-like polymer base layer extrusion coated onto the first side of said paper substrate, the polymer of said base layer being selected from the group consisting of polypropylene, high density polyethylene, medium density polyethylene, low density polyethylene, high molecular weight HDPE, linear low density polyethylene, and straight chained or branched or blends thereof, said paper-like polymer base layer containing filler material and having an exposed surface with a roughness of between about 10 to 400 Sheffield units and with coefficients of static and kinetic friction of between about 0.1 to 0.6.
Claim 2
Dependent Claim
115 words
A composite release liner for use with label face stock, said release liner comprising: a paper substrate having first and second sides; and a paper-like polymer base layer extrusion coated onto the first side of said paper substrate, the polymer of said base layer being selected from the group consisting of polypropylene, high density polyethylene, medium density polyethylene, low density polyethylene, high molecular weight HDPE, linear low density polyethylene, and straight chained or branched or blends thereof, said paper-like polymer base layer containing filler material and having an exposed surface with a roughness of between about 10 to 400 Sheffield units and with coefficients of static and kinetic friction of between about 0.1 to 0.6.
Claim 3
Dependent Claim
27 words
The composite release liner component of claim 1, wherein the paper-like polymer base layer includes a polymer having a density of between about 0.85 to 1.40 (g/cc).
Claim 4
Dependent Claim
27 words
The composite release liner component of claim 1, wherein the paper-like polymer base layer includes a polymer having a density of between about 0.90 to 0.95 (g/cc).
Claim 5
Dependent Claim
27 words
The composite release liner component of claim 1, wherein the paper-like polymer base layer includes a medium density polyethylene having a density of between about 0.93-0.95 (g/cc).
Claim 6
Dependent Claim
28 words
The composite release liner component of claim 1, wherein the paper-like polymer base layer includes a polymer having a melt index between about 1.0 to 20 (g\10 min.).
Claim 7
Dependent Claim
25 words
The composite release liner component of claim 1, wherein the paper-like polymer base layer is extruded to a thickness of between 0.4 to 1.6 mils.
Claim 8
Dependent Claim
25 words
The composite release liner component of claim 1, wherein the paper-like polymer base layer is extruded to a thickness of between 0.7 to 1.2 mils.
Claim 9
Dependent Claim
35 words
The composite release liner component of claim 1, having between about 15 to 40% by weight of the filler material in the paper-like polymer base layer based on the total weight of the base layer.
Claim 10
Dependent Claim
26 words
The composite release liner component of claim 1, wherein said filler material is an inert particulate material having average size of less than about 50 microns.
Claim 11
Dependent Claim
31 words
The composite release liner component of claim 1, wherein said filler material is selected from the group consisting of glass beads, calcium based products, clay, silica, mica, talc, and titanium dioxide.
Claim 12
Dependent Claim
22 words
The composite release liner component of claim 1, wherein the exposed surface of the paper-like polymer base layer does not exhibit blocking.
Claim 13
Dependent Claim
19 words
The composite release liner component of claim 1, wherein said roughness is between about 150 to 350 Sheffield units.
Claim 14
Dependent Claim
23 words
The composite release liner component of claim 1, further comprising a polymeric second layer extruded onto the second side of said paper substrate.
Claim 15
Dependent Claim
38 words
The composite release liner component of claim 13, wherein said polymeric second layer is selected from the group consisting of polypropylene, polyethylene terephthalate, high density polyethylene, medium density polyethylene, low density polyethylene, acrylonitrile, butadiene, styrene, nylon and polystyrene.
Claim 16
Dependent Claim
36 words
The composite release liner component of claim 13, wherein said polymeric second layer is selected from the group consisting of polypropylene, high density polyethylene, medium density polyethylene, low density polyethylene, acrylonitrile, butadiene, styrene, nylon and polystyrene.
Claim 17
Dependent Claim
31 words
The composite release liner component of claim 13, wherein said polymeric second layer is selected from the group consisting of polypropylene, high density polyethylene, medium density polyethylene and low density polyethylene.
Claim 18
Dependent Claim
22 words
The composite release liner component of claim 13, further comprising: a release film on the outer surface of said polymeric second layer.
Claim 19
Dependent Claim
16 words
The composite release liner component of claim 17, wherein said release film is a silicone-based film.
Claim 20
Dependent Claim
19 words
The composite release liner component of claim 17, further comprising: a pressure sensitive adhesive adhered to the release film.
Claim 21
Dependent Claim
29 words
The composite release liner component of claim 19, wherein the pressure sensitive adhesive is selected from the group consisting of acrylics, vinyl acrylics, tackified synthetic and natural rubber polymers.
Claim 22
Dependent Claim
20 words
The composite release liner component of claim 17, further comprising: a label face stock laminated to said pressure sensitive adhesive.
Claim 23
Dependent Claim
27 words
The composite release liner component of claim 21, wherein the label face stock is selected from the group consisting of polyvinyl chloride, polyester, polypropylene and/or polyethylene polymers.
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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) | 2003-08-29 | 2004-02-28 | 2004-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-08-29 | 2008-02-28 | 2008-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-08-29 | 2012-02-28 | 2012-08-29 | $7700.00 | Window Closed / Lapsed |