Resin layer having a specific elastic modulus, optical film, and image displaying device
AssigneeDai Nippon Printing Co., Ltd.
InventorsAtsuhiro Kobayashi, Yousuke Kousaka, Takayuki Fukuda, Kazuya Honda, Kana Yamamoto, Yoshimasa Ogawa, Jun Sato, Gen Furui, Keisuke Yamada, Saori Kawaguchi
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Abstract
One embodiment of the present disclosure provides a resin layer 10 used for an image displaying device, wherein a shear storage elastic modulus G′ of the resin layer 10, at 25° C. and frequency range of 500 Hz or more and 1000 Hz or less, is 30 MPa or more and 200 MPa or less, and a glass transition temperature of the resin layer 10 is 50° C. or more.
Claims15
An optical film with a foldable stacked structure,
- the optical film comprising a resin layer and a hard coating layer,
- wherein
- a shear storage elastic modulus G′ of the resin layer, at 25° C. and frequency range of 500 Hz or more and 1000 Hz or less, is 30 MPa or more and 200 MPa or less;
- a glass transition temperature of the resin layer is 50° C. or more and 90° C. or less;
- the hard coating layer is provided on one surface side of the resin layer so as to be in contact with the resin layer;
- and
- the resin layer comprises a urethane-based resin.
An optical film with a foldable stacked structure,
- the optical film comprising a resin layer and a hard coating layer, wherein
- a shear storage elastic modulus G′ of the resin layer, at 25° C. and frequency range of 500 Hz or more and 1000 Hz or less, is 30 MPa or more and 200 MPa or less;
- a glass transition temperature of the resin layer is 50° C. or more and 90° C. or less;
- the hard coating layer is provided on one surface side of the resin layer so as to be in contact with the resin layer;
- and
- the resin layer comprises 15 to 90 parts by mass of a urethane (meth)acrylate having 2 to 4 (meth)acryloyl groups and a weight average molecular weight of 1,500 to 20,000.
An optical film with a foldable stacked structure,
- the optical film comprising a resin layer and a hard coating layer, wherein
- a shear storage elastic modulus G′ of the resin layer, at 25° C. and frequency range of 500 Hz or more and 1000 Hz or less, is 30 MPa or more and 200 MPa or less;
- a glass transition temperature of the resin layer is 50° C. or more and 90° C. or less;
- the hard coating layer is provided on one surface side of the resin layer so as to be in contact with the resin layer;
- and
- the resin layer comprises 5 to 50 parts by mass of a polyfunctional (meth)acrylate selected from pentaerythritol triacrylate, pentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, and dipentaerythritol hexaacrylate.
An optical film with a foldable stacked structure,
- the optical film comprising a resin layer and a hard coating layer, wherein
- a shear storage elastic modulus G′ of the resin layer, at 25° C. and frequency range of 500 Hz or more and 1000 Hz or less, is 30 MPa or more and 200 MPa or less;
- a glass transition temperature of the resin layer is 50° C. or more and 90° C. or less;
- the hard coating layer is provided on one surface side of the resin layer so as to be in contact with the resin layer;
- and
- the resin layer comprises 5 to 10 parts by mass of a monofunctional (meth)acrylate selected from phenoxyethyl acrylate, dicyclopentanyl acrylate, and isobornyl acrylate.
Dependencies are inferred from the claim text.