HEAT-GENERATING BODY, LAMINATED GLASS, AND DEFROSTER
Provided is a heating element capable of suppressing the rapid temperature rise even when the supply voltage is high. The heating element includes a resin film and heating wires provided on at least one surface of the resin film and including a copper wire, wherein copper crystal grains forming the copper wire have a cross-sectional crystal size of less than 1.5 μm.
1 . A heating element comprising:
a resin film; and
heating wires provided on at least one surface of the resin film and comprising a copper wire,
wherein copper crystal grains forming the copper wire have a cross-sectional crystal size of less than 1.5 μm.
2 . The heating element according to claim 1 , wherein each of the heating wires has a thickness of 70 μm or less.
3 . The heating element according to claim 1 or 2 , wherein each of the heating wires has a line width of 1 μm or more and 30 μm or less.
4 . The heating element according to claim 1 or 2 , wherein the heating wires are provided into at least one pattern selected from the group consisting of linear-shaped, wavy line-shaped, lattice-shaped, and net-shaped patterns.
5 . The heating element according to claim 1 or 2 , wherein the resin film has a thickness of 1 μm or more and 1,000 μm or less.
6 . The heating element according to claim 1 or 2 , wherein the resin film comprises a polyvinyl acetal resin.
7 . The heating element according to claim 6 , wherein the polyvinyl acetal resin is a polyvinyl butyral resin.
8 . The heating element according to claim 1 or 2 , further comprising an additional resin film, wherein the heating wires are sandwiched between the additional resin film and the resin film.
9 . A laminated glass comprising:
a pair of glass sheets; and
the heating element according to claim 1 or 2 sandwiched between the pair of glass sheets.
10 . A defroster comprising:
the laminated glass according to claim 9 ; and
a voltage supply unit connected to the laminated glass and capable of applying voltage to the heating element.
11 . The defroster according to claim 10 , to be used for a vehicle in which a supply voltage to electrical parts is 24 V or more.