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Multilayer laminate film

A laminated film and laminated body technology, applied in the direction of layered products, synthetic resin layered products, instruments, etc., can solve the problems of optical quality, difficult to achieve high reflectivity, low reflectivity and other problems, and achieve high polarization Effect

Active Publication Date: 2021-05-14
TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the number of layers that can be stacked is limited, it is difficult to achieve high reflectivity over a wide reflection wavelength range
In addition, increasing the reflectance of light in only a specific wavelength range may result in a decrease in the reflectance of light in other reflected wavelength ranges, causing optical quality issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0130] Embodiments of the present disclosure are described below with reference to Examples; however, the present disclosure is not limited to the Examples shown below. The physical properties and characteristics in the examples were measured or evaluated by the following methods.

[0131] 1) The thickness of each layer

[0132] The multilayer laminated film was cut out to a size of 2 mm in the length direction of the film and 2 cm in the width direction, fixed into an embedding capsule, and then embedded in epoxy resin (Epomount, manufactured by Refine Tec Ltd.) . The embedded sample was cut perpendicular to the width direction with a microtome (Ultracut-UCT, manufactured by Leica) to obtain thin sections with a thickness of 50 nm. Thin sections of the film were observed and photographed using a transmission electron microscope (Hitachi S-4300) at an accelerating voltage of 100 kV. The thickness (physical thickness) of each layer was measured from the photograph.

[0133]...

manufacture example 1

[0150] Manufacturing Example 1: Polyester A

[0151] The polyester for the first layer was prepared as follows. Dimethyl 2,6-naphthalene dicarboxylate, dimethyl terephthalate and ethylene glycol were transesterified in the presence of titanium tetrabutoxide, followed by further polycondensation to prepare 95 mol% of the acid component as Copolyester (intrinsic viscosity: 0.64dl / g; using o-Chlorophenol is measured at 35°C; the following applies).

manufacture example 2

[0152] Manufacturing Example 2: Polyester B

[0153] The polyester for the second layer was prepared as follows. Dimethyl 2,6-naphthalene dicarboxylate, dimethyl terephthalate, ethylene glycol and 1,3-propanediol were transesterified in the presence of titanium tetrabutoxide, followed by further polycondensation to produce 50 mol% of The acid component is 2,6-naphthalene dicarboxylic acid component, 50mol% of the acid component is terephthalic acid component, 85mol% of the diol component is ethylene glycol component and 15mol% of the diol component Part is a copolyester of 1,3-propanediol component (intrinsic viscosity: 0.63dl / g).

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Abstract

The layer thickness profile of the optical thickness of a first layer has a first monotonically increasing region, and the first monotonically increasing region comprises a 1A monotonically increasing region in which the maximum optical thickness is up to 100 nm and a 1B monotonically increasing region in which the minimum optical thickness is greater than 100 nm, and the ratio 1B / 1A of the slope 1B in the 1B monotonically increasing region to the slope 1A in the 1A monotonically increasing region is greater than zero and less than 0.8; the layer thickness profile of the optical thickness of a second layer has a second monotonically increasing region, and the second monotonically increasing region comprises a 2A monotonically increasing region in which the maximum optical thickness is up to 200 nm and a 2B monotonically increasing region in which the minimum optical thickness is greater than 200 nm, and the ratio 2B / 2A of the slope 2B in the 2B monotonically increasing region to the slope 2A in the 2A monotonically increasing region is 0.8-1.5.

Description

technical field [0001] The present disclosure relates to a multilayer laminate film that can broadly reflect light in the visible region. Background technique [0002] A multilayer laminated film in which many layers with a low refractive index and many layers with a high refractive index are alternately laminated can be used as an optical interference film that selectively reflects or transmits light having a specific wavelength due to optical interference caused by a layered structure . Further, such a multilayer laminated film can reflect or transmit light in a wide wavelength range by gradually changing the film thickness of each layer in the thickness direction, or by pasting together films having different reflection peaks; obtaining and using a metal film same high reflectivity; and used as a metallic gloss film or mirror. Further, it is known that by stretching such a multilayer laminated film in one direction, the multilayer laminated film can also be used as a re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30B32B7/023G02B5/28
CPCG02B5/0841G02B27/286G02B5/287G02B5/286G02B5/3083G02B1/04B32B7/023B32B27/08G02B5/3041G02F1/133536
Inventor 中川大中西庸介渡部誉之
Owner TOYOBO CO LTD