Nippon Electric Glass Co., Ltd.

Industrial Technology Research Institute

Yasuo Yamazaki

Takahide Fujii

Michiharu Eta

Tatsuya Takaya

Masahiro Tomamoto

Takahide Nakamura

Hidetaka Oda

Hiroshi Takimoto

Katsutoshi Fujiwara

Daisuke Nagata

Toru Sakurabayashi

Mitsuharu Noda

Yasuhiko Ogiso

Shinichi Ishibashi

Keiji Takagi

Chun-Hsien Chien

Hsin-Yun Hsu

Chia-Sheng Huang

Ting-Yu Ke

A glass roll includes a glass film formed by a downdraw method. The glass film is wound into a roll using a winding roller in a state in which front and back glass surfaces of the glass film formed in the forming operation are exposed, and during the winding operation, the glass film is superposed on a separable protective sheet. The protective sheet extends beyond both sides in a width direction of the glass film. The protective sheet can further be wound on an outer peripheral surface of the glass film by winding only the protective sheet from a trailing end of the glass film in a winding direction of the glass film.

Glass roll with a separable protective sheet

In a method of producing a glass substrate including a laminate preparing step of laminating a glass filmhaving flexibility and a support glasssupporting the same, to prepare a laminate; a process step of forming an organic EL deviceon the glass filmin the laminate, involving heating; and a peeling step of peeling off the glass filmon which the organic EL deviceis formed from the support glassto obtain a glass substrate, a heating step of heating the glass filmand the support glassis executed before execution of the laminate preparing step, and the glass filmand the support glassare laminated in the condition that they are heated at the time of execution of the laminate preparing step.

Method for producing glass substrate

A glass roll reliably prevents a glass film from breaking from an end surface of the glass film as an origin of breakage. The glass roll is formed by winding the glass film into a roll while superposing the glass film on a protective sheet. The glass film is formed by an overflow downdraw method to have a thickness of 1 &#x3bc;m or more and 200 &#x3bc;m or less, and has each end surface in a width direction formed as a cut surface cut by laser splitting.

Glass roll, device for producing glass roll, and process for producing glass roll

A manufacturing method for a glass roll includes forming a glass film by a downdraw method, winding the glass film into a roll using a winding roller in a state in which front and back glass surfaces of the glass film formed in said forming operation are exposed, and during said winding operation, superposing the glass film on a separable protective sheet. The protective sheet extends beyond both sides in a width direction of the glass film. The method may further include winding the protective sheet on an outer peripheral surface of the glass film by winding only the protective sheet from a trailing end of the glass film in a winding direction of the glass film.

Process for producing glass roll with a separable protective sheet

Provided is a glass roll utilizing a flanged roll core, and reliably inhibiting a glass film from breaking from an end portion in a width direction thereof as an origin of breakage. A glass roll () is formed by winding a glass film () and a cushion sheet (), under a state of being superposed, around a roll core () including a flange () at each end portion thereof, in which an end portion in a width direction of the glass film () is separated from the flange () on each side in the width direction of the glass film (), and the cushion sheet () is extended beyond the end portion in the width direction of the glass film () to the flange () side, to thereby form an extension portion ().

Glass roll

Provided is a glass roll formed by winding a glass film into a roll, in which a minimum winding radius of the glass film is optimized. Thus, the glass film is reliably prevented from breaking due to static fatigue, and is able to be stored for long periods. A glass roll (), which is formed by winding a glass film () into a roll, has a configuration in which the glass film has a minimum winding radius (R) satisfying the following relation: R&#x2267;(T/2)[(2.3/&#x3c3;)&#xd7;E&#x2212;1], where &#x3c3; represents flexural strength of the glass film () obtained by a 3-point bending test, T represents a thickness of the glass film, and E represents a Young's modulus of the glass film.

Glass roll and process for producing glass roll

Growing community of inventors

Otsu, Japan

Yasuo Yamazaki