WHITE FILM, METAL LAMINATE, SUBSTRATE FOR MOUNTING LED, AND LIGHT SOURCE DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a white film which has high heat resistance and high reflecting ratio in a visible light range, is suppressed reduction of the reflecting ratio under high temperature heat load environment, can enlarge an area and is used for a printed wiring board for mounting an LED, and to provide a metal foil laminate.

SOLUTION: The white film 100 includes: a layer (A) 20 including a thermoplastic resin; and a layer (B) 30 including silicone resin including inorganic filler, wherein the average reflecting ratio in wavelength of 400-800 nm is 70% or more and the reducing rate of the reflecting ratio in wavelength of 470 nm after heating at 200°C for 4 hours is 10% or less.

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