Glass panel unit and glass window
An object of the disclosure is to provide a glass panel and a glass window which are configured to stably maintain a depressurized space therein even when their spacers contain a resin. A glass panel unit of an aspect of the disclosure includes: a first glass pane; a second glass pane facing the first glass pane; a frame member which has a frame shape and which the first and second glass panes are bound together through; and spacers containing a resin and disposed between the first and second glass panes. A depressurized space is provided between the first glass pane and the second glass pane. The first and second glass panes are respectively to be exterior and interior panes. The first glass pane has lower ultraviolet transmittance than the second glass pane.
1. A glass panel unit, comprising:
a first glass pane including at least a plate glass;
a second glass pane including at least a plate glass facing the first glass pane;
a frame member which has a frame shape and which the first glass pane and the second glass pane are bound together through; and
a spacer disposed between the first glass pane and the second glass pane,
a depressurized space being provided between the first glass pane and the second glass pane,
the spacer is formed of a polyimide film including a benzene ring,
the first glass pane being, in use, an exterior pane, the second glass pane being, in use, an interior pane, and
the first glass pane having a transmittance of light in an ultraviolet wavelength range of 300 nm to 400 nm lower than the transmittance of light in an ultraviolet wavelength range of 300 nm to 400 nm of the second glass pane.
2. The glass panel unit according to claim 1 , further comprising an identification structure that allows identification of the first glass pane and the second glass pane.
3. The glass panel unit according to claim 1 , wherein
the second glass pane has a mark of an exhaust port used for when the depressurized space is formed.
4. The glass panel unit according to claim 1 , wherein
the first glass pane includes plate-shaped glass and a thin film containing metal.
5. The glass panel unit according to claim 1 , further comprising:
a third glass pane facing an intermediate glass pane which is one of the first glass pane and the second glass pane; and
an adhesive body which has a frame shape and which the third glass pane and the intermediate glass pane are bound together through, wherein
a closed space is provided between the third glass pane and the intermediate glass pane.
6. A glass window, comprising:
the glass panel unit according to claim 1 ; and
a window frame disposed at an outer periphery of the glass panel unit.