Claims
- 1. A method of preparing an antistatic roll film backing paper for photographic roll film, comprising:
- applying a polyethylene layer to a paper substrate;
- applying an opaquing layer to said polyethylene layer at a temperature sufficient to melt the polyethylene, said opaquing layer comprising polyethylene and from about 7 to 10% by weight of a mixture of conductive and non-conductive carbon black particles, said mixture containing from 20 to 80% by weight of conductive carbon black particles.
- 2. The method of claim 1 wherein said mixture contains from 30 to 80% by weight of conductive carbon black particles.
- 3. The method of claim 2 wherein said mixture contains about 70% by weight of conductive carbon black particles.
- 4. The method of claim 1 wherein said polyethylene layer applied to said paper is free of carbon black particles.
- 5. The method of claim 1 wherein said polyethylene layer is applied to said paper substrate as a latex emulsion.
- 6. The method of claim 5 wherein said polyethylene latex emulsion is a polyethylene copolymer latex emulsion.
- 7. The method of claim 5 wherein said latex emulsion layer is applied to the substrate as an aqueous coating which is dried prior to application of said opaquing layer.
- 8. The method of claim 1 wherein said polyethylene layer is extruded onto said paper substrate.
- 9. The method of claim 8 wherein the polyethylene layer is extruded onto the paper substrate at a temperature of between 300.degree. and 320.degree. C.
Priority Claims (1)
Number |
Date |
Country |
Kind |
9100194.1 |
Jan 1991 |
GBX |
|
Parent Case Info
This is a continuation of application Ser. No. 07/811,846, filed Dec. 23, 1991.now abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (3)
Number |
Date |
Country |
741377(A) |
Apr 1970 |
BEX |
60-260041(A) |
Dec 1985 |
JPX |
2222700(A) |
Mar 1990 |
GBX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
811846 |
Dec 1991 |
|