MATERIAL ROLL OF WHITE REFLECTION SHEET WITH METAL FOIL, MATERIAL ROLL OF WHITE REFLECTION SHEET WITH CIRCUIT, AND METHOD FOR PRODUCING THEM

摘要

PROBLEM TO BE SOLVED: To solve such a problem that when a material roll is produced by winding a white reflection sheet with metal foil into a roll-like shape or another roll is produced by winding another white reflection sheet with a circuit, the metal foil is wrinkled or warped and the circuit is not formed correctly or is broken due to a difference between elongation property of the metal foil or the circuit and that of the white reflection sheet.SOLUTION: A material roll is produced by winding a white reflection sheet with metal foil into a roll-like shape. The white reflection sheet with metal foil includes: a white reflection layer; and the metal foil layered on the white reflection layer. The white reflection layer is obtained by applying a silicone resin composition, which contains an uncured silicone material and an inorganic white filler and has 2-80 Shore D hardness when cured, to the metal foil and curing the applied composition.