Glass panel unit
A glass panel unit according to an example of the present disclosure includes a first glass panel and a second glass panel disposed to face the first glass panel. The glass panel unit includes: a seal having frame shape and hermetically binding the first glass panel and the second glass panel together; and a depressurized space surrounded by the first glass panel, the second glass panel, and the seal. The glass panel unit includes spacers between the first glass panel and the second glass panel. The spacers include a macromolecular resin material including molecular chains. Of the molecular chains, the number of molecular chains oriented in an orthogonal direction is larger than the number of molecular chains oriented in a counter direction. The orthogonal direction is a direction orthogonal to the counter direction, which is a direction in which the first and second glass panels face each other.
1. A glass panel unit, comprising:
a first glass panel including at least a glass pane;
a second glass panel disposed to face the first glass panel, the second glass panel including at least glass pane;
a seal having a frame shape and hermetically binding the first glass panel and the second glass panel together;
a depressurized space surrounded by the first glass panel, the second glass panel, and the seal; and
a spacer disposed between the first glass panel and the second glass panel, wherein
the spacer contains a macromolecular resin material including molecular chains, and
of the molecular chains, a number of molecular chains oriented in an orthogonal direction is larger than a number of molecular chains oriented in a counter direction, the orthogonal direction being orthogonal to the counter direction, the counter direction being a direction in which the first glass panel and the second glass panel face each other.
2. The glass panel unit according to claim 1 , wherein
the spacer is formed of a macromolecular film elongated in the orthogonal direction, a normal direction to a surface of the macromolecular film corresponding to the counter direction, an elongation ratio of the spacer in a first direction orthogonal to the counter direction being different from an elongation ratio of the spacer in a second direction orthogonal to the counter direction and the first direction.
3. The glass panel unit according to claim 1 , wherein
an elongation ratio of the spacer in at least one of a first direction and a second direction is larger than or equal to 5.
4. The glass panel unit accordingly to claim 2 , wherein
an elongation ratio of the spacer in at least one of a first direction and a second direction is larger than or equal to 5.