公开(公告)号：US10112369B2

公开(公告)日：2018-10-30

申请号：US15022889

申请日：2014-07-04

Applicant: RIKEN TECHNOS CORPORATION

Inventor： Kohei Nakashima ,  Shintaro Negimoto

IPC: B32B27/08 ,  B32B27/16 ,  B32B27/30 ,  B32B27/36 ,  B32B37/15 ,  B29C47/00 ,  B29C47/06 ,  B29C47/14 ,  B29C47/92 ,  B29K69/00 ,  B29K79/00 ,  B29L9/00

Abstract: Embodiments of the invention provide a transparent poly(meth)acrylimide-based resin multilayer film exhibiting excellent surface smoothness, transparency, outer appearance, and resistance to puchability. According to at least one embodiment, there is provided a method for producing said transparent multilayer film, in which the transparent multilayer film in which a first poly(meth)acrylimide-based resin layer (α1), an aromatic polycarbonate-based resin layer (β), and a second poly(meth)acrylimide-based resin layer (α2) are directly laminated in said order, and in that the total light transmittance exceeds 90% and the haze is 2.0% or lower. The transparent multilayer film is produced by continuously coextruding, from a T die, a molten film of the transparent multilayer film in which the aforementioned layers were directly laminated in the aforementioned order, and by supplying and then pressing the molten film between a first mirror body that has a surface temperature between 100 and 200° C. and a second mirror body that has a surface temperature between 20 and 200° C.

公开(公告)号：US11465323B2

公开(公告)日：2022-10-11

申请号：US16330631

申请日：2017-07-25

Applicant: RIKEN TECHNOS CORPORATION

Inventor： Hideaki Yambe ,  Kohei Nakashima

IPC: B29C48/00 ,  B29C48/21 ,  B32B27/08 ,  B32B27/30 ,  B32B27/36 ,  B32B37/15 ,  B29C48/885 ,  B29C48/49 ,  B29C48/88 ,  B29C48/92 ,  B29K33/04 ,  B29K69/00 ,  B29L7/00

Abstract: Embodiments provide a method for producing a multilayer film, the method including: (A) a step for continuously coextruding from a T die (3) a molten film (4) of a multilayer film in which a first acrylic resin layer (α1), an aromatic polycarbonate resin layer (β), and a second acrylic resin layer (α2) are directly laminated in the stated order using a coextrusion apparatus; (B) a step for feeding and pressing the molten film of the multilayer film between a first mirror surface body (5) that rotates or revolves and a second mirror surface body (6) that rotates or revolves so that the first acrylic resin layer (α1) is disposed on the first-mirror-surface-body side; and (C) a step for holding the pressed multilayer film against the first mirror surface body and sends the pressed multilayer film to the subsequent third mirror surface body (8) that rotates or revolves, where TR1 (surface temperature of first mirror surface body), TR2 (surface temperature of second mirror surface body), Tα1 (glass transition temperature of first acrylic resin), Tα2 (glass transition temperature of second acrylic resin), and Tβ (glass transition temperature of aromatic polycarbonate resin) satisfy a prescribed relationship.

公开(公告)号：US11065851B2

公开(公告)日：2021-07-20

申请号：US15559400

申请日：2016-02-05

Applicant: RIKEN TECHNOS CORPORATION

Inventor： Kohei Nakashima ,  Hideaki Yambe ,  Nozomu Washio ,  Taketo Hashimoto

IPC: B32B27/18 ,  B32B27/36 ,  B32B7/02 ,  B32B7/12 ,  B32B38/00 ,  B32B27/20 ,  B32B27/30 ,  B29C48/21 ,  C08J7/043 ,  C08J7/046 ,  C09D7/40

Abstract: One embodiment provides a multilayer hard coating film which sequentially includes, from the superficial layer side, a first hard coating and a resin film, and wherein: the first hard coating is formed from a coating material that contains a specific amount of (A) a polyfunctional (meth)acrylate and a specific amount of (B) a water repellent agent, while containing no inorganic particles; and the resin film includes at least one layer of (α) an acrylic resin that contains 50-95% by mole of a structural unit derived from methyl methacrylate and 50-5% by mole of a structural unit derived from vinyl cyclohexane when the total of the structural units derived from polymerizable monomers is taken as 100% by mole. Another embodiment provides a multilayer hard coating film which includes a second hard coating in addition to a first hard coating, and wherein: the first hard coating contains (C) a silane coupling agent in addition to the above-described components (A) and (B); and the second hard coating is formed from a coating material that contains a specific amount of (A) a polyfunctional (meth)acrylate and a specific amount of (D) inorganic fine particles having an average particle diameter of 1-300 nm.

公开(公告)号：US10450431B2

公开(公告)日：2019-10-22

申请号：US14904025

申请日：2014-06-11

Applicant: RIKEN TECHNOS CORPORATION

Inventor： Kohei Nakashima ,  Kazutaka Yamada ,  Hidemasa Sugimoto ,  Yoshihiro Zennyoji

IPC: B29C59/16 ,  C08J5/18 ,  B29C59/10 ,  B29C71/04 ,  B32B27/06 ,  B32B27/28 ,  B32B27/30 ,  C08J7/04 ,  C08J7/06 ,  C08J7/12 ,  B29C48/08 ,  B29C48/00 ,  B29C48/30 ,  B29C48/92 ,  B29C48/305 ,  B29C48/40 ,  B29C48/88 ,  B29K79/00 ,  B29L7/00 ,  B29C48/27

Abstract: Embodiments of the invention relate to a poly(meth)acrylimide film and a method for manufacturing such a film. At least one embodiment provides a poly(meth)acrylimide film that has (i) a total light transmittance of over 90% and (ii) haze of 2.0% or less. This film preferably has retardation of less than 50 nm. The method for manufacturing this film includes the following steps: (A) using a device provided with an extruder and a T die, a poly(meth)acrylimide molten film is continuously extruded from the T die; and (B) the poly(meth)acrylimide molten film is loaded by being fed between a rotating or circulating first mirrored-surface body and a rotating or circulating second mirrored-surface body, and then the film is pressed. During these steps, (C) the surface temperature of the first mirrored-surface body is in the range 100-200° C., and (D) the surface temperature of the second mirrored-surface body is in the range 20-200° C.