Laminated film for optical use

Details Laminated film for optical use Laminated film for optical use

2006-04-11

2006-04-11

Chen, Vivian (Department: 1773)

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

C428S212000, C428S323000, C428S330000, C428S331000, C428S480000, C428S690000, C528S275000, C528S277000, C528S279000, C528S283000, C528S285000, C528S286000, C528S287000

Reexamination Certificate

active

07026035

ABSTRACT:
There is provided a laminated film for optical use comprising a polyester film which has a lubricity layer containing globular particles in at least one side thereof, wherein the laminated film has a thickness irregularity of 0.5 to 7.0%, and wherein the polyester film contains inert particles derived from catalysts and the amount of the inert particles determined by a dark-field microscopy satisfies the following conditions:the number of inert particles having a particle size of from 1 to 10 μm is 200 to 20,000/mm2; andthe number of inert particles having a particle size of greater than 10 μm is 10/mm2or less.The laminated film for optical use which is improved in uniformity, transparency, lubricity, color tone and scratch resistance, which deposits only a reduced amount of low molecular materials, and which is excellent in the adhesion to a layer adopted for various optical purposes.

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