公开(公告)号：US10155683B2

公开(公告)日：2018-12-18

申请号：US15907674

申请日：2018-02-28

申请人： Asahi Glass Company, Limited

发明人： Ikuo Nagasawa ,  Jun Ito

IPC分类号： C03B33/095 ,  C03C21/00 ,  C03C23/00 ,  B23K26/55 ,  F16L9/10

摘要： A glass tube production method includes (1) preparing a tubular glass material, (2) irradiating an outer main surface of the tubular glass material with a laser to form an in-plane void region having a plurality of voids arranged on the outer main surface, and forming a plurality of internal void rows each having one void or two or more voids arranged from the in-plane void region toward an inner main surface of the tubular glass material, and (3) chemically strengthening the tubular glass material having the internal void rows formed therein.