Photographic polyester support

• US 5,294,473 A
• Filed: 08/13/1993
• Issued: 03/15/1994
• Est. Priority Date: 08/18/1992
• Status: Expired due to Term

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Inventors: Kawamoto, Fumio
• Primary Examiner(s): BRAMMER, JACK
• Application Number:
  US08/105,627
• Time in Patent Office: 214 Days
• Field of Search: 428/141, 428/409, 428/480, 428/913, 430/523, 430/533
• US Class Current: 428/141
• CPC Class Codes: G03C 1/7954 Polyesters
• CPC Class Codes: Y10T 428/24355 Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
• CPC Class Codes: Y10T 428/31 Surface property or characteristic of web, sheet or block
• CPC Class Codes: Y10T 428/31786 Of polyester [e.g., alkyd, etc.]

Abstract

A photographic polyester support is disclosed which hardly curls when heat-treated at a temperature of from 50° C. to the glass transition temperature thereof in the form of a bulk roll, its thickness pattern satisfying the conditions of (1) Max-Min in the whole widthwise direction (TD R value): 8 μm or less, (2) Max-Min of 5 m length in the lengthwise direction (MD R value): 10 μm or less, (3) the difference in thickness between the adjacent hill and hollow (MD fluctuation): 8 μm or less, and (4) the maximum value of hills above a base line of the average thickness of both ends (TD base line value): 5 μm or less. The surface flatness of the heat-treated support is good. When the support is coated with photographic emulsions, the surface of the coated photographic material is even.

Claims

1. A photographic polyester support which has a thickness pattern having a TD R value, an MD R value, an MD fluctuation and a TD base line value as follows:

(1) TD R value;

8 μ

m or less

(2) MD R value;

10 μ

m or less

(3) MD fluctuation;

8 μ

m or less

(4) TD base line value;

5 μ

m or less.

2. A photographic polyester support as claimed in claim 1, which has been coated with at least one of a subbing layer and a backing layer.

3. A photographic polyester support as claimed in claim 1, which is made of polyethylene terephthalate or a compound formed therefrom or polyethylene naphthalate or a compound formed therefrom.

4. A photographic polyester support as claimed in claim 1, which is made of a polyester obtained by reacting 2,6-naphthalene-dicarboxylic acid or dimethyl 2,6-naphthalene-dicarboxylate and a glycol consisting essentially of ethylene glycol.

5. A photographic polyester support as claimed in claim 4, which has been biaxially stretched 3.0 to 3.5 times in a lengthwise direction and 2.8 to 4.2 times in a crosswise direction.

6. A photographic polyester support as claimed in claim 1, which has been knurled.

7. A photographic polyester support as claimed in claim 6, in which the knurled thickness is thicker than the mean thickness of the bulk roll by 5 μ

m to 50 μ

m.

8. A photographic polyester support as claimed in any of claims 1 to 7, which has a thickness of from 60 μ

m to 90 μ

m.

9. A photographic polyester support as claimed in claim 1, which is made of polyethylene naphthalate.

10. A photographic polyester support as claimed in claim 1, wherein the support is a film containing an ultraviolet absorbent.

11. A photographic polyester support as claimed in claim 1, wherein the support is a film which has been treated by a corona-discharging treatment.

12. A photographic polyester support as claimed in claim 2, which is coated with a subbing layer of a hydrophilic binder.

13. A photographic polyester support as claimed in claim 12, which is coated with a subbing layer of gelatin.