Photographic printing paper support

Details Photographic printing paper support Photographic printing paper support

1990-04-04

1993-04-06

Sluby, P. C.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

4284251, 4284755, 4284793, 428496, 428513, 428464, 162206, B32B 2308, B32B 1510, D21F 1100

Patent

active

052002586

ABSTRACT:
A support for used in photographic printing paper is provided comprising a base paper covered on both sides with polyolefin coating, said base paper being one which has undergone calender treatment between a metallic roll and a synthetic resin roll and then between a metallic roll and another metallic roll.
In a preferred embodiment, the calender treatment is performed at the final finishing process. The calender treatment between the metallic roll and the synthetic resin roll is performed in such a manner that the density of the paper is increased to from 0.70 to 1.00 g/cm.sup.3 and the calender treatment between the metallic rolls is performed in such a manner that the density of the paper is increased to from 1.00 to 1.20 g/cm.sup.3. The material of the synthetic resin roll is selected from the group consisting of urethane resin, ebonite resin, nylon resin, aramide resin and isocyanurate resin. The hardness of the synthetic resin roll is from 60 to 90, preferably 75 to 90 in terms of Shore hardness. The surface temperature of the synthetic resin roll and the metallic rolls are in the range of 30.degree. to 150.degree. C., preferably 50.degree. to 100.degree. C., and 50.degree. to 250.degree. C., preferably 70.degree. to 150.degree. C., respectively.

REFERENCES:
patent: 4534829 (1985-08-01), Ahrweiler et al.
patent: 4670102 (1987-06-01), Maurer et al.
patent: 4738197 (1988-04-01), Malkia162206
Patent Abstracts of Japan, vol. 13, No. 226 (P-887)(3614), Jun. 20, 1989; and JP-A-0159230 (Fuji) Jun. 3, 1989.

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