EP0144247A2
Expired / Lapsed
EP
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Dye-receiving sheets for thermal recording
Assignee: Panasonic Holdings Corp
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Filing: 1984-12-06
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Granted: —
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Expires: 2004-12-06
Abstract
Abstract Dye-receiving sheets for thermal recording which comprise a support and a dye-developing or receiving layer formed on the support. The layer is made of a composition comprising a dispersion of inorganic fine particles uniformly dispersed throughout a binder of a mixture comprising a first resin having good dye receptivity or good affinity for dyes and a second resin immiscible with the first resin. The binder mixture of two different types of resins allows microscopic interstices to exist at or along boundaries of the resins, through which interstices dye molecules penetrate and chemically combine with and/or adsorb on active sites of the inorganic particles and the first resin.
Inventors
- 👤 Shu Hotta
- 👤 Tokihiko Shimizu
- 👤 Nobuyoshi Taguchi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 05:33
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/50; B41M5/52; B41M5/5218; B41M5/529; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893; Y10T428/25; Y10T428/256; Y10T428/257; Y10T428/259
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
81 words
A dye-receiving sheet for thermal recording comprising a support and a color-developing layer formed on the support, said layer being made of a dispersion of inorganic fine particles having a size below 10 pm in a binder consisting of a first resin having functional groups permitting good dye receptivity and a second resin immiscible with the first resin whereby microscopic interstices are formed at and along boundaries between the two resins and permit dye molecules to be passed through the interstices.
Claim 2
Dependent Claim
81 words
A dye-receiving sheet for thermal recording comprising a support and a color-developing layer formed on the support, said layer being made of a dispersion of inorganic fine particles having a size below 10 pm in a binder consisting of a first resin having functional groups permitting good dye receptivity and a second resin immiscible with the first resin whereby microscopic interstices are formed at and along boundaries between the two resins and permit dye molecules to be passed through the interstices.
Claim 3
Dependent Claim
19 words
A dye-receiving sheet according to claim 1, wherein said first resin has a solubility parameter not smaller than 9.5.
Claim 4
Dependent Claim
16 words
A dye-receiving sheet according to claim 2, wherein the solubility parameter is not smaller than 10.0.
Claim 5
Dependent Claim
22 words
A dye-receiving sheet according to claim 1, 2 or 3 wherein said second resin has a solubility parameter not larger than 9.0.
Claim 6
Dependent Claim
16 words
A dye-receiving sheet according to claim 4, wherein the solubility parameter is not larger than 8.5.
Claim 7
Dependent Claim
24 words
A dye-receiving sheet according to any one of the preceding claims, wherein said second resin is a hydrocarbon resin, fluorine resin or silicone resin.
Claim 8
Dependent Claim
27 words
A dye-receiving sheet according to any one of the preceding claims, wherein the volume ratio of said second resin to said first resin is 0.1 to 10:1.
Claim 9
Dependent Claim
23 words
A dye-receiving sheet according to any one of the preceding claims, wherein said inorganic fine particles have an average size below 50 nm.
Claim 10
Dependent Claim
34 words
A dye-receiving sheet according to any one of the preceding claims, wherein the volume ratio of said inorganic fine particles to the total amount of the first and second resins is 0.1 to 10:1.
Claim 11
Dependent Claim
24 words
Use of a dye-receiving sheet as claimed in any one of the preceding claims in the formation of a visible image by thermal recording.
References Cited (Backward Citations)
No citation records indexed.
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