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Patent EP0507489A1 successfully refreshed from Google Patents.
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EP0507489A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Photographic paper supports coated with a polyester

Assignee: Fujifilm Holdings Corp
•
Filing: 1992-03-25
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Granted: —
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Expires: 2012-03-25
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Abstract

Abstract A paper sheet is coated by melt extrusion with a coating of (a) a mixture of (1) polyethylene terephthalate or a copolymer thereof, optionally with up to 50 wt% of other polymers and (2) titanium oxide particles, or (b) (1) a polyester, which is a homo- or copolymer or mixture thereof, e.g. polyethylene terephthalate, (2) a polyolefin, preferably polyethylene, and (3) titanium dioxide particles. The weight ratio of the polymer(s) to the TiO 2 is preferably 98:2 to 50:50. The weight ratio of (a) the polyester to the polyolefin is generally 70:30 to 99.9:0.2. The mixture is coated on at least one surface; a polyolefin can be coated on the back surface; on the coating a photographic emulsion is then coated.

Inventors

  • 👤 Takahito C/O Fuji Photo Film Co. Ltd. Miyoshi
  • 👤 Toshimitu c/o Fuji Photo Film Co. Ltd. Okutu
  • 👤 Sugihiko C/O Fuji Photo Film Co. Ltd. Tada
  • 👤 Takanori C/O Fuji Photo Film Co. Ltd. Sato

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-07 16:50
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/95

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 35 words
A photographic paper support comprising a paper sheet having a composition comprising (1) a polyester comprising polyethylene terephthalate as the main component and (2) titanium oxide coated on at least one surface of the paper.
Claim 2
Dependent Claim 31 words
A photographic paper support, comprising a paper sheet having a composition comprising (1) a polyester, (2) a polyolefin and (3) titanium oxide coated on at least one surface of the paper.
Claim 3
Dependent Claim 14 words
A photographic paper support as claimed in Claim 2, wherein said polyolefin is polyethylene.
Claim 4
Dependent Claim 26 words
A photographic paper support as claimed in Claim 2 or 3, wherein the weight ratio of said polyester to said polyolefin is from 70:30 to 99.8:2.
Claim 5
Dependent Claim 24 words
A photographic paper support as claimed in Claim 4, where the weight ratio of said polyester to said polyolefin is from 80:20 to 99:1.
Claim 6
Dependent Claim 24 words
A photographic paper support as claimed in Claim 5, wherein the weight ratio of said polyester to said polyolefin is from 90:10 to 99:1.
Claim 7
Dependent Claim 28 words
A photographic paper support as claimed in any preceding claim, wherein the weight ratio of said polyester component (1) to said titanium oxide is from 98:2 to 50:50.
Claim 8
Dependent Claim 19 words
A photographic paper support as claimed in any of Claims 2 to 7, wherein said polyester is polyethylene terephthalate.
Claim 9
Dependent Claim 35 words
A photographic paper support as claimed in Claim 8, wherein said polyester comprising polyethylene terephthalate as the main component and said titanium oxide are present in a ratio of from 95:5 to 70:30 by weight.
Claim 10
Dependent Claim 22 words
A photographic paper support as claimed in any preceding claim, wherein the thickness of said coated layer is 5 to 100 µm.

References Cited (Backward Citations)

EP0389266A1 Cited

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