US5087601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversible thermosensitive recording material
Assignee: Ricoh Co Ltd
•
Filing: 1989-10-04
•
Granted: 1992-02-11
•
Expires: 2009-10-04
Abstract
Abstract A reversible thermosensitive recording material is disclosed, which comprises (i) a reversible thermosensitive recording layer which comprises as the main components a matrix resin and an organic low-molecular-weight material dispersed in the matrix resin, and (ii) a light reflection layer made of a metal thin film, which is preferably surface-treated to have a specular gloss of 70 to 250% in accordance with JIS Z8741 or a surface roughness of 0.5 to 10 mu m in terms of the ten-point average roughness defined in JIS B0601. This reversible thermosensitive recording material may further comprises a crystal-growth controlling agent in the reversible thermosensitive recording layer.
Inventors
- 👤 Yoshihiko Hotta
- 👤 Keishi Kubo
- 👤 Makoto Kawaguchi
- 👤 Toru Nogiwa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:24
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/36; B41M5/363; B41M5/30; B41M5/305
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
55 words
A reversible thermosensitive recording material comprising (i) a reversible thermosensitive recording layer which comprises a matrix resin and an organic low-molecular-weight material which is dispersed in said resin, (ii) a light reflection layer made of a metal thin film, and (iii) a transparent support interposed between said thermosensitive recording layer and said light reflection layer.
Claim 2
Dependent Claim
55 words
A reversible thermosensitive recording material comprising (i) a reversible thermosensitive recording layer which comprises a matrix resin and an organic low-molecular-weight material which is dispersed in said resin, (ii) a light reflection layer made of a metal thin film, and (iii) a transparent support interposed between said thermosensitive recording layer and said light reflection layer.
Claim 3
Dependent Claim
46 words
The reversible thermosensitive recording material as claimed in claim 1, further comprising an adhesive layer which is interposed between said transparent support and said light reflection layer, and a second transparent support formed on said light reflection layer on a side opposite to said adhesive layer.
Claim 4
Dependent Claim
31 words
The reversible thermosensitive recording material as claimed in claim 1, further comprising a second transparent support on said light reflection layer on a side opposite to said reversible thermosensitive recording layer.
Claim 5
Dependent Claim
30 words
The reversible thermosensitive recording material as claimed in claim 1, further comprising a light absorption layer which is interposed between said reversible thermosensitive recording layer and said light reflection layer.
Claim 6
Dependent Claim
57 words
The reversible thermosensitive recording material as claimed in claim 1, further comprising a transparent support for supporting said reversible thermosensitive recording layer thereon, and a light reflection layer support member for protecting said light reflection layer, with said reversible thermosensitive recording layer being disposed so as to be superimposed on said light reflection layer through said support.
Claim 7
Dependent Claim
49 words
The reversible thermosensitive recording material as claimed in claim 1, wherein said metal thin film has a specular gloss of 70 to 250% in accordance with JIS Z8741 or a surface roughness of 0.5 to 10 μm in terms of a ten-point average roughness as defined in JIS B0601.
Claim 8
Dependent Claim
26 words
The reversible thermosensitive recording material as claimed in claim 1, wherein said organic low-molecular-weight material has a melting point ranging from 30° C. to 200° C.
Claim 9
Dependent Claim
63 words
The reversible thermosensitive recording material as claimed in claim 1, wherein said organic low-molecular-weight material is a compound containing at least one group or a moiety selected from the group consisting of --OH, --COOH, --COOR (wherein R is NH 4 or an alkyl group having 1 to 20 carbon atoms), --CONH 2 , --NH--, --NH 2 , --S--, --S--S--, --O--, and a halogen.
Claim 10
Dependent Claim
47 words
The reversible thermosensitive recording material as claimed in claim 1, wherein said organic low-molecular-weight material is a higher fatty acid selected from the group consisting of lauric acid, dodecanoic acid, myristic acid, pentadecanoic acid, palmitic acid, stearic acid, behenic acid, nonadecanoic acid, arachic acid and oleic acid.
Claim 11
Dependent Claim
42 words
The reversible thermosensitive recording material as claimed in claim 1, wherein said organic low-molecular-weight material is an ester of a higher fatty acid selected from the group consisting of methyl stearate, tetradecyl stearate, octadecyl stearate, octadecyl laurate, tetradecyl palmitate, and dodecyl behenate.
Claim 12
Dependent Claim
25 words
The reversible thermosensitive recording material as claimed in claim 1, wherein said organic low-molecular-weight material is an ether selected from the group consisting of: ##STR5##
Claim 13
Dependent Claim
25 words
The reversible thermosensitive recording material as claimed in claim 1, wherein said organic low-molecular-weight material is a thioether selected from the group consisting of ##STR6##
Claim 14
Dependent Claim
25 words
The reversible thermosensitive recording material as claimed in claim 1, wherein said organic low-molecular-weight material is a compound selected from the group consisting of: ##STR7##
Claim 15
Dependent Claim
136 words
The reversible thermosensitive recording material as claimed in claim 1, wherein said organic low-molecular-weight material is a compound selected from the group consisting of an alkanol; an alkane diol; a halogenated alkanol; a halogenated alkane diol; an alkylamine; an alkane; an alkene; an alkyne; a halogenated alkane; a halogenated alkene; a halogenated alkyne; a cycloalkane; a cycloalkene; a cycloalkyne; a saturated or unsaturated monocarboxylic acid, a saturated or unsaturated dicarboxylic acid, esters, amides and ammonium salts thereof; a saturated or unsaturated halogenated fatty acid, esters, amides and ammonium salts thereof; an arylcarboxylic acid, esters, amides and ammonium salts thereof; a halogenated arylcarboxylic acid, esters, amides and ammonium salts thereof; a thioalcohol; a thiocarboxylic acid, esters, amides and ammonium salts thereof; and a carboxylic acid ester of thioalcohol, each said compounds having 10 to 60 carbon atoms.
Claim 16
Dependent Claim
19 words
The reversible thermosensitive recording material as claimed in claim 1, wherein said matrix resin is a vinyl chloride copolymer.
Claim 17
Dependent Claim
54 words
The reversible thermosensitive recording material as claimed in claim 15, wherein said vinyl chloride copolymer is selected from the group consisting of polyvinyl chloride, vinyl chloride - vinyl acetate copolymer, vinyl chloride - vinyl acetate - vinyl alcohol copolymer, vinyl chloride - vinyl acetate - maleic acid copolymer and vinyl chloride - acrylate copolymer.
Claim 18
Dependent Claim
19 words
The reversible thermosensitive recording material as claimed in claim 1, wherein said matrix resin is a vinylidene chloride copolymer.
Claim 19
Dependent Claim
36 words
The reversible thermosensitive recording material as claimed in claim 17, wherein said vinylidene chloride copolymer is selected from the group consisting of polyvinylidene chloride, vinylidene chloride - vinyl chloride copolymer and vinylidene chloride - acrylonitrile copolymer.
Claim 20
Dependent Claim
32 words
The reversible thermosensitive recording material as claimed in claim 1, wherein said matrix resin is selected from the group consisting of polyester, polyamide, polyacrylate, polymethacrylate, acrylate - methacrylate copolymer, and silicone resin.
Claim 21
Dependent Claim
39 words
The reversible thermosensitive recording material as claimed in claim 1, wherein the ratio by weight of the amount of said organic low-molecular-weight material to the amount of the matrix resin is in the range of about 1:0.5 to 1:16.
Claim 22
Dependent Claim
24 words
The reversible thermosensitive recording material as claimed in claim 1 wherein said reversible thermosensitive recording layer has a thickness of 1 to 30 μm.
Claim 23
Dependent Claim
33 words
The reversible thermosensitive recording material as claimed in claim 1, wherein said reversible thermosensitive recording layer further comprises a crystal-growth controlling agent which can control the crystal growth of said organic low-molecular-weight material.
Claim 24
Dependent Claim
138 words
The reversible thermosensitive recording material as claimed in claim 22, wherein said crystal-growth controlling agent is selected from the group consisting of polyhydric alcohol higher fatty acid esters; polyhydric alcohol higher alkyl ethers; sub-olefin oxide addition products of polyhydric alcohol higher fatty acid ester, higher alcohol, higher alkylphenol, higher alkylamine of higher fatty acid, amides of higher fatty acid, fat and oil of higher fatty acid and polypropylene glycol; acetylene glycol; sodium, calcium, barium and magnesium salts of higher alkyl benzenesulfonic acid; sodium, calcium, barium and magnesium salts of higher fatty acid, aromatic carboxylic acid, higher aliphatic sulfonic acid, aromatic sulfonic acid, sulfuric monoester, phosphoric monoester and phosphoric diester; lower sulfated oil; long-chain polyalkyl acrylate; acrylic oligomer; long-chain polyalkyl methacrylate; long-chain alkyl methacrylate - amine-containing monomer copolymer; styrene - maleic anhydride copolymer; and olefin - maleic anhydride copolymer.
Claim 25
Dependent Claim
80 words
The reversible thermosensitive recording material as claimed in claim 22, wherein said crystal-growth controlling agent is selected from the group consisting of tributyl phosphate, tri-2-ethylhexyl phosphate, triphenyl phosphate, tricresyl phosphate, butyl oleate, dimethyl phthalate, diethyl phthalate, dibutyl phthalate, diheptyl phthalate, di-n-octyl phthalate, di-2-ethylhexyl phthalate, diisononyl phthalate, dioctyldecyl phthalate, diisodecyl phthalate, butylbenzyl phthalate, dibutyl adipate, di-n-hexyl adipate, di-2-ethylhexyl adipate, di-2-ethylhexyl azelate, dibutyl sebacate, di-2-ethylhexyl sebacate, diethylene glycol dibenzoate, triethylene glycol, di-2-ethylbutyrate, methyl acetylricinoleate, butyl acetylricinoleate, butylphthalyl butyl glycolate and tributyl acetylcitrate.
Claim 26
Dependent Claim
39 words
The reversible thermosensitive recording material as claimed in claim 22, wherein the ratio by weight of the amount of said organic low-molecular-weight material to the amount of said crystal-growth controlling agent is in the range of (1:0.01) to (1:0.8).
Claim 27
Dependent Claim
36 words
The reversible thermosensitive recording material as claimed in claim 1, wherein said metal thin film is made of a metal selected from the group consisting of Al, Ge, Au, Ag, Cu and Ti, and alloys thereof.
Claim 28
Dependent Claim
42 words
The reversible thermosensitive recording material as claimed in claim 1, further comprising a second transparent support for supporting said light reflection layer and an adhesive layer, wherein said adhesive layer is interposed between said light reflection layer and said second transparent support.
Claim 29
Dependent Claim
45 words
The reversible thermosensitive recording material as claimed in claim 27, wherein said adhesive layer comprises a resin selected from the group consisting of saturated polyester resin, vinyl chloride - vinyl acetate - maleic acid copolymer, and vinyl chloride - vinyl acetate - vinyl alcohol copolymer.
Claim 30
Dependent Claim
22 words
The reversible thermosensitive recording material as claimed in claim 2, 3 or 27, wherein said second transparent support is a polyester film.
Claim 31
Dependent Claim
46 words
The reversible thermosensitive recording material as claimed in claim 1, wherein said metal thin film has a specular gloss of 70 to 250% in accordance with the following formula: ##EQU2## or a surface roughness of 0.5 to 10 μm in terms of a ten-point average roughness.
References Cited (Backward Citations)
US4917948A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-02-10 | 1995-08-12 | 1996-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-10 | 1999-08-12 | 2000-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-10 | 2003-08-12 | 2004-02-11 | $7700.00 | Window Closed / Lapsed |