Nitto-denko Corporation

Nippon Electric Glass Co., Ltd.

Toshihiro Kanno

Takeshi Murashige

Junichi Inagaki

Kota Nakai

Kazuhito Hosokawa

Atsushi Kishi

Satoshi Hirata

Hiroki Mori

Naoyuki Matsuo

Keisuke Sato

Kaoru Mitsugi

Yoshinori Hasegawa

Satoru Kunikata

Kentarou Yoshida

Naoki Tomoguchi

Naohiro Ikai

Yohei Kirihata

A method is disclosed for dividing a composite material in which a brittle material layer and a resin layer are laminated, including: a resin removing step of irradiating the resin layer with a laser beam oscillated from a first laser source along a scheduled dividing line of the composite material to form a processing groove along the scheduled dividing line; a brittle material removing step of irradiating the brittle material layer with a laser beam oscillated from an ultrashort pulsed laser source along the scheduled dividing line to form a processing mark along the scheduled dividing line; and a brittle material layer dividing step of generating thermal stress in the brittle material layer by irradiating the brittle material layer with a laser beam oscillated from a second laser source from the opposite side to the resin layer to thereby divide the brittle material layer.

Method for dividing composite material

Provided is a glass film-resin composite which makes it possible to obtain a long-length (e.g., 500 m or more-long) glass roll. The glass film-resin composite comprises a glass film, and a resin tape laminated to at least one surface of the glass film through an adhesive, wherein the width l (mm) of the resin tape satisfies the following formula (1). (where: a represents a reinforcement coefficient (mm*(μm)) which is 1.10 or more; Eg represents the Young's modulus (GPa) of the glass film; Ep represents the Young's modulus (GPa) of the resin tape; tg represents the thickness (μm) of the glass film; and tp represents the thickness (μm) of the resin tape.).

Glass film-resin composite

Provided is an optical laminate in which optical defects is less likely to occur when used in an optical device such as a display. A laminate () includes a flexible glass film () having a thickness of 150 μm or less and a resin film () laminated on the glass film with an adhesive layer () interposed therebetween. The number of contaminants having a size of 100 μm or more in the adhesive layer is preferably 10/mor less. When the contaminants protrude from the surface of the adhesive layer (), the height and inclination angle of protrusions is preferably small.

Optical laminate with glass film and resin film

Provided is a method comprises: continuously forming an elongated, glass film having marginal portions from molten glass into a given shape having two marginal portions, in width-directional opposite edge regions thereof, wherein the glass film having marginal portions has the marginal portions, and an effective portion formed in a width-directional central region of the glass film having marginal portions; annealing the glass film having marginal portions; continuously forming resin tapes on the glass film having marginal portions at positions adjacent to and away by a given distance from the respective marginal portions, to extend in a length direction of the glass film having marginal portions; and continuously removing each of the marginal portions from the glass film having marginal portions, along a position between the marginal portion and a corresponding one of the resin tapes, or at a given width-directional position within the corresponding resin tape.

Manufacturing method for glass film with resin tape, and manufacturing method for glass film

Provided is a glass film-resin composite body which makes it possible to obtain a long-length (e.g., 500 m or more-long) glass roll. The glass roll with resin film comprises a glass film, and a resin film laminated to at least one surface of the glass film through an adhesive, wherein a creep amount a of the adhesive is 50 μm or less, as measured after applying a tensile shear load per unit area of the adhesive of 5 g/mm, to the resin film for 48 hours, in a state in which the glass film is fixed in 23° C. and 50% RH.

Glass roll with resin film

Provided is a glass film-resin composite which makes it possible to obtain a long-length (e.g., 500 m or more-long) glass roll. The glass film-resin composite comprises a glass film, and a resin tape laminated to at least one surface of the glass film through an adhesive, wherein the width(mm) of the resin tape satisfies the following formula (1). (where: a represents a reinforcement coefficient (mm*(&#x3bc;m)) which is 1.10 or more; Eg represents the Young's modulus (GPa) of the glass film; Ep represents the Young's modulus (GPa) of the resin tape; tg represents the thickness (&#x3bc;m) of the glass film; and tp represents the thickness (&#x3bc;m) of the resin tape.)

Provided is a production method for a film laminate by which a tough film can be bonded to a brittle film while the breakage of the brittle film is prevented. The production method for a film laminate of the present invention includes bonding a tough film having an elongated shape to a brittle film having an elongated shape while conveying the brittle film, wherein the method includes bonding the tough film and the brittle film to each other by bringing the tough film close to the brittle film, followed by blowing of a gas from a side of the tough film opposite to the brittle film.

Production method for film laminate

Provided is a method of manufacturing a laminated film, the method including laminating a glass film and a resin film via an adhesive layer, by which peeling between the glass film and the resin film is prevented, and hence a laminated film excellent in appearance can be obtained. The method of manufacturing a laminated film of the present invention includes the steps of: laminating a glass film and a resin film via an adhesive to provide a precursor laminate; and curing the adhesive by applying an active energy ray to the precursor laminate, wherein the curing step includes nonuniformly applying the active energy ray in a surface of the precursor laminate.

Layered film production method

Provided is a glass film-resin composite, which prevents the breakage of a glass film and enables the production of an elongated glass film. The glass film-resin composite of the present invention includes: an elongated glass film; and a resin tape arranged on at least one surface of the elongated glass film, wherein the resin tape is linearly arranged at least near each of both ends in a widthwise direction of the elongated glass film in one surface of the elongated glass film, and wherein the resin tape includes an adhesive layer, and the adhesive layer is directly arranged on the elongated glass film.

Provided is a glass film-resin composite body which makes it possible to obtain a long-length (e.g., 500 m or more-long) glass roll. The glass roll with resin film comprises a glass film, and a resin film laminated to at least one surface of the glass film through an adhesive, wherein a creep amount a of the adhesive is 50 &#x3bc;m or less, as measured after applying a tensile shear load per unit area of the adhesive of 5 g/mm, to the resin film for 48 hours, in a state in which the glass film is fixed in 23&#xb0; C. and 50% RH.

A method of producing a laminate according to an embodiment of the present invention includes applying an application liquid containing a polyvinyl alcohol-based resin to one side of a resin substrate, followed by drying of the application liquid to form a polyvinyl alcohol-based resin layer. The method includes: passing the application liquid before the application through a depth-type filter having a filtration accuracy of from 50 &#x3bc;m to 100 &#x3bc;m; and fluctuating a pressure applied to the application liquid supplied to the depth-type filter to remove air bubbles in the filter.

Growing community of inventors

Ibaraki, Japan

Toshihiro Kanno