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
m is 200 to 20,000/mm2; and
- the number of inert particles having a particle size of greater than
10 m is 10/mm2 or 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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