US4898849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated thermally printable material and method of producing the same
Assignee: Nashua Corp
•
Filing: 1987-12-29
•
Granted: 1990-02-06
•
Expires: 2007-12-29
Abstract
Abstract Disclosed is a heat-sensitive recording material useful in the manufacture of thermal paper and thermal labels. The material comprises a cellulosic or other suitable substrate, a thermally imprintable color-producing layer, and a protective layer over the color-producing layer. It may also include a second protective layer and/or a pressure-sensitive adhesive layer, on the surface of the substrate opposite from the color-producing layer, and a releasable liner covering the adhesive layer. The color-producing layer includes a basic, acid-neutralizing agent for both reducing background discoloration during manufacturing and increasing image definition. The protective layer comprises a cross-linked binder and fluorochemical surfactant-treated hydrocarbon or fluorocarbon particles as a friction reducing material.
Inventors
- 👤 Ming-Huang J. Kang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:57
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/40; B41M5/42; B41M5/44; B41M5/446; G; G09; G09F; G09F3/00; G09F3/02; B41M5/423; G09F2003/0264; G09F2003/0266; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914; Y10T; Y10T428/00; Y10T428/14; Y10T428/1405; Y10T428/1424; Y10T428/1429; Y10T428/1452; Y10T428/1471
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
107 words
A heat-sensitive recording material comprising: A. a substrate; B. a thermal imagewise imprintable color-producing layer affixed to a first surface of said substrate comprising a leuco dye developable upon exposure to an acidic developer, an acidic developer, and a binder material for said dye and developer; and C. a protective layer overlying said color-producing layer, wherein said protective layer comprises; an organic water soluble resin cross-linked during its formation in situ atop said color-producing layer and containing dispersed friction reducing polymer particles and a fluorocarbon surfactant, said material being characterized by decreased surface friction and resistance to background discoloration and image fading induced by exposure to solvents.
Claim 2
Dependent Claim
107 words
A heat-sensitive recording material comprising: A. a substrate; B. a thermal imagewise imprintable color-producing layer affixed to a first surface of said substrate comprising a leuco dye developable upon exposure to an acidic developer, an acidic developer, and a binder material for said dye and developer; and C. a protective layer overlying said color-producing layer, wherein said protective layer comprises; an organic water soluble resin cross-linked during its formation in situ atop said color-producing layer and containing dispersed friction reducing polymer particles and a fluorocarbon surfactant, said material being characterized by decreased surface friction and resistance to background discoloration and image fading induced by exposure to solvents.
Claim 3
Dependent Claim
28 words
The material of claim 1 wherein said protective layer comprises an organic resin film cross-linked during its formation on said substrate by an acid-catalyzed, covalently acting cross-linking agent.
Claim 4
Dependent Claim
23 words
The recording material of claim 1 further comprising an adhesive layer affixed to a second surface of said substrate opposite said first surface.
Claim 5
Dependent Claim
13 words
The material of claim 1 wherein said color-producing layer comprises particulate calcium carbonate.
Claim 6
Dependent Claim
20 words
The material of claim 1 wherein said protective layer comprises a carboxylated polyvinyl alcohol resin, cross-linked covalently with melamine formaldehyde.
Claim 7
Dependent Claim
26 words
The material of claim 1 wherein said friction reducing particles comprises heat stable polymeric particles selected from the group consisting of polymeric hydrocarbons and polymeric fluorocarbons.
Claim 8
Dependent Claim
20 words
The material of claim 6 wherein said particles are selected from the group consisting of polyethylene particles and polytetrafluoroethylene particles.
Claim 9
Dependent Claim
14 words
The material of claim 1 wherein said fluorocarbon surfactant is an amine perfluoroalkyl sulfonate.
Claim 10
Dependent Claim
55 words
The material of claim 1 wherein said color-producing layer comprises a fluoran dye, a polyvinyl alcohol binder and calcium carbonate particles, and said protective layer comprises carboxylated polyvinyl alcohol cross-linked with melamine formaldehyde and contains dispersed aluminum trihydrate, an amine perfluoroalkyl sulfonate, and friction reducing particles selected from the group consisting of polyethylene and polytetrafluoroethylene.
Claim 11
Dependent Claim
49 words
The material of claim 1 comprising the following ingredients in the following parts by weight: ______________________________________
Ingredient Parts by Weight
______________________________________
polymeric binder material
100
organic cross-linking agent
1 to 200
fluorocarbon surfactant
10.sup.-6
to 20
friction reducing particles
0.05 to 60
inert filler particles
10 to 500
______________________________________
Claim 12
Dependent Claim
49 words
The material of claim 1 comprising the following ingredients in the following parts by weight: ______________________________________
Ingredient Parts by Weight
______________________________________
polymeric binder material
100
organic cross-linking agent
5 to 80
fluorocarbon surfactant
10.sup.-4
to 2.0
friction reducing particles
1.0 to 20
inert filler particles
50 to 240
______________________________________
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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) | 1993-02-05 | 1993-08-07 | 1994-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-05 | 1997-08-07 | 1998-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-05 | 2001-08-07 | 2002-02-06 | $7700.00 | Window Closed / Lapsed |