Laminated film
AssigneeToray Industries, Inc.
InventorsTAKAYUKI UTO, SYUNICHI OSADA
Life of this patent
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Abstract
A width-direction multilayer laminated film having a large area and uniform optical properties is provided. A light guide, a light diffusion film, a light collecting film, a viewing angle control film, and an optical waveguide film, which are low cost and have excellent optical properties, as well as an illuminating device, a communication device, and a display using these films. The laminated film may include at least a structure in which a layer made of resin A (layer A) and a layer made of resin B (layer B) are alternately laminated in the width direction, wherein the width of the film is 400 nm or more and the number of layer Bs, each having a cross-sectional width from 0.1 μm to 10,000 μm, is 10 or larger.
Claims3
An extrusion die for laminating at least two kinds of resins in the width direction, said extrusion die comprising:
- not less than 10 nozzles arranged in the width direction;
- not less than 10 holes arranged in such a manner that said holes surround each of said arranged nozzles;
- and
- a junction which communicates with said arranged nozzles and said holes, said extrusion die comprising at least one flow path communicating with the junction in a different route from that between said nozzle and said hole.
An extrusion die for laminating at least two kinds of resins in the width direction, wherein said extrusion die comprises:
- not less than 10 holes arranged in the width direction;
- a junction which communicates with said arranged holes;
- and
- at least one flow path communicating with said junction in a different route from that with said holes, wherein said holes are asymmetric relative to the center axis in the thickness direction of said hole.
Dependencies are inferred from the claim text.