Nippon Electric Glass Co., Ltd.

Nitto-denko Corporation

Naohiro Ikai

Kaoru Mitsugi

Hiroki Mori

Yoshinori Hasegawa

Shuji Akiyama

Hiroshi Adachi

Kazuhito Hosokawa

Takeshi Murashige

Junichi Inagaki

Kota Nakai

Koichi Mori

Toshihiro Kanno

Yohei Kirihata

Yasuhiro Uemura

Kenichi Murata

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 method of manufacturing a glass film, including a cleaving step (S) of cleaving a band-like glass film (G) conveyed in a predetermined conveying direction (X) through irradiation of the glass film (G) with a laser beam (L). The cleaving step (S) includes: a step of, while supporting a lower surface of the glass film (G) by a surface plate () including an opening (), suctioning the glass film (G) through the opening (); and a step of irradiating the glass film (G) suctioned through the opening () with the laser beam (L).

Method for producing glass film

Provided is method of producing a glass roll, the method including: a conveying step of conveying a glass film (G) along a longitudinal direction thereof; a cutting step of irradiating the glass film (G) with a laser beam (L) from a laser irradiation apparatus () while conveying the glass film (G) by the conveying step, to thereby separate the glass film (G) into a non-product portion (Gc) and a product portion (Gd); and a take-up step of taking up the product portion (Gd) into a roll shape, to thereby form a glass roll (R). The cutting step includes winding a thread-like peeled material (Ge) generated from an end portion of the product portion (Gd) in a width direction around a rod-shaped collecting member (), to thereby collect the thread-like peeled material (Ge).

Method for manufacturing glass roll

A conveying device () for a glass film (G) includes: a first support () configured to support a first portion (Gc) of the glass film (G) having been cut; a second support () configured to support a second portion (Gd) of the glass film (G) having been cut; and an opening () formed at a position between the first support () and the second support () and below a laser irradiation apparatus (). A cutting step for the glass film (G) includes deforming the glass film (G) so as to be convex downward through the opening (), and radiating a laser beam (LB) from the laser irradiation apparatus () to a position which is within a range of the opening (), and which is prevented from coinciding with a top (GT) of the glass film (G).

Glass film production method

A sheet roll comprises two glass films and a coupling portion, wherein end portions of the glass films are coupled together via the coupling portion and the coupled glass films are rolled into a roll shape. The coupling portion is a sheet-like coupling member formed of a resin film and placed on the end portions of the two glass films in a rolling direction so as to span therebetween. The sheet-like coupling member includes wide joint portions joined respectively to the end portions of the two glass films, and a necked portion which is narrower than the wide joint portions and is formed at a middle portion of the sheet-like coupling member in the rolling direction.

Sheet roll and sheet-like coupling member

A cleaving apparatus holds at least one surface (effective surface) of a band-like glass film in a non-contact state to suppress a situation that wavy portions reach a region in which the band-like glass film is to be cleaved. The cleaving apparatus cleaves the band-like glass film, which is being conveyed in a longitudinal direction thereof, along a conveyance direction thereof using a thermal stress generated through localized heating and cooling of a heated region. The localized heating and the cooling is performed on a preset cleaving line extending along the conveyance direction of the band-like glass film. The cleaving apparatus includes an air knife for supplying air to a front surface of the band-like glass film to retain the film on a conveyor at a position on an upstream side of a cleaving region in the conveyance direction.

Growing community of inventors

Shiga, Japan

Naohiro Ikai