Glass film laminate, glass roll of the laminate, method of protecting end face of glass film, and method of producing glass roll
A glass film laminate has a glass film, a support sheet laminated on one surface of the glass film to extend off the glass film, and a protective sheet peelably laminated on the other surface of the glass film to cover the edges of the glass film. A glass roll is produced by winding the laminate.
1. A glass roll, which is produced by winding a glass film laminate, the glass film laminate comprising:
a glass film having a thickness of 300 μm or less and being continuous entirely in the glass film laminate;
a support sheet laminated on a first surface of the glass film and extending beyond the glass film; and
a protective sheet peelably laminated on a second surface of the glass film and covering edges of the glass film.
2. The glass roll according to claim 1 , wherein the support sheet has a cohesive strength of 0.002 to 2.00 N/25 mm.
3. The glass roll according to claim 1 , wherein the support sheet has a thickness of 3 to 250 μm.
4. The glass roll according to claim 1 , wherein the protective sheet has a thickness of 3 to 250 μm.
5. The glass roll according to claim 1 , wherein the protective sheet covers a cohesive portion of the support sheet.
6. The glass roll according to claim 1 , wherein the protective sheet is substantially identical in size to the support sheet.
7. A method of producing a glass roll, the method comprising:
laminating a cohesive support sheet on a first surface of a glass film so that the cohesive support sheet extends beyond the glass film, the glass film having a thickness of 300 μm or less;
peelably laminating a protective sheet on a second surface of the glass film so that the protective sheet covers edges of the glass film and a cohesive portion of the cohesive support sheet; and
winding a glass film laminate including the glass film, the cohesive support sheet, and the protective sheet,
wherein the glass film is continuous entirely in the glass film laminate.
8. The method according to claim 7 , wherein the winding of the glass film laminate comprises curving the glass film.
9. The glass roll according to claim 1 , wherein at least one of the support sheet and the protective sheet is made of a closed cell foamed resin.
10. The glass roll according to claim 1 , wherein the protective sheet does not cover an effective surface of the second surface of the glass film.
11. The glass roll according to claim 1 , wherein the glass film is curved in the glass roll.