Claims
- 1. A biaxially oriented, laminated polyester film having a lamination structure comprising two outermost surfaces and at least two layers, wherein at least one of said surfaces comprises a thin laminated layer A having a lamination thickness of not less than 0.01 .mu.m and not more than 3 .mu.m, said thin laminated layer A containing mono-dispersed particles having a mean degree of agglomeration of less than 5 and a mean primary particle diameter of not less than 0.05 .mu.m and not more than 3 .mu.m at a content of not less than 0.05% by total weight of said film and less than 0.3% by total weight of said film.
- 2. The biaxially oriented, laminated polyester film according to claim 1, wherein the mean primary particle diameter of said mono-dispersed particles is in the range of 0.1 to 2 .mu.m.
- 3. The biaxially oriented, laminated polyester film according to claim 2, wherein the mean primary particle diameter of said mono-dispersed particles is in the range of 0.2 to 1 .mu.m.
- 4. The biaxially oriented, laminated polyester film according to claim 1, wherein the content of said mono-dispersed particles in said thin laminated layer A is not less than 0.1% by weight and less than 0.3% by weight.
- 5. The biaxially oriented, laminated polyester film according to claim 1, wherein the mean primary particle diameter "d" (.mu.m) of said mono-dispersed particles and the thickness "t" (.mu.m) of said thin laminated layer A satisfies the equation 0.2 d.ltoreq.t .ltoreq.10 d.
- 6. The biaxially oriented, laminated polyester film according to claim 5, wherein the mean primary particle diameter "d" (.mu.m) of said mono-dispersed particles and the thickness "t" (.mu.m) of said thin laminated layer A satisfies the equation 0.3 d.ltoreq.t.ltoreq.5 d.
- 7. The biaxially oriented, laminated polyester film according to claim 1, wherein a parameter of surface roughness (P10) of said thin laminated layer A is not more than 350 nm.
- 8. The biaxially oriented, laminated polyester film according to claim 7, wherein the parameter of surface roughness (P10) of said thin laminated layer A is not more than 300 nm.
- 9. The biaxially oriented, laminated polyester film according to claim 1, wherein a relative standard deviation of height distribution of protrusions formed on the surface of said thin laminated layer A is not more than 1.2.
- 10. The biaxially oriented, laminated polyester film according to claim 9, wherein the relative standard deviation of height distribution of protrusions is not more than 1.0.
- 11. The biaxially oriented, laminated polyester film according to claim 1, wherein an abrasion of the surface of said thin laminated layer A determined using a razor at a low film-running speed is not more than 40 .mu.m.
Priority Claims (1)
Number |
Date |
Country |
Kind |
5-235879 |
Aug 1993 |
JPX |
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Parent Case Info
This application is a divisional of Application Ser. No. 08/297,611, filed Aug. 29, 1994, now U.S. Pat. No. 5,532,047.
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Divisions (1)
|
Number |
Date |
Country |
Parent |
297611 |
Aug 1994 |
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