초록 ▼

Provided is an antistatic white polyester film for a surface illuminant reflector, which has practically adequate reflective performance in a visible light region, can form a film with stability even if inorganic fine particles are added in a high concentration, prevents dirt and dust from adhering

Provided is an antistatic white polyester film for a surface illuminant reflector, which has practically adequate reflective performance in a visible light region, can form a film with stability even if inorganic fine particles are added in a high concentration, prevents dirt and dust from adhering to the surface of the film due to having an antistatic coat, can control the gloss levels of the front and back sides of the film, and thereby can control a diffusing property of light, and can be suitably used as a base material for a reflector used for a liquid crystal display or an internally illuminated electric ornament signboard. An antistatic white polyester film for a surface illuminant reflector, having a base material layer formed by using a polyester resin and an antistatic applied layer having the surface resistivity of 3×1012□/□ or less at a temperature of 23° C. and at a relative humidity of 50%, wherein an average reflectivity at a wavelength of 400 to 700 nm is 90% or more on one surface of the polyester film and a difference in a gloss level (60°) between one surface and the other surface of the polyester film is 5 to 80.

대표청구항 ▼

The invention claimed is: 1. An antistatic white polyester film for a surface illuminant reflector, having a thickness of 25 μm to 250 μm, a base material layer formed by using a polyester resin and an applied antistatic layer having a surface resistivity of 3×1012 Ω/sq or less at a temperature of 2

The invention claimed is: 1. An antistatic white polyester film for a surface illuminant reflector, having a thickness of 25 μm to 250 μm, a base material layer formed by using a polyester resin and an applied antistatic layer having a surface resistivity of 3×1012 Ω/sq or less at a temperature of 23° C. and at a relative humidity of 50%, whereinan average reflectivity at a wavelength of 400 to 700 nm is 90% or more and a gloss level at 60° is 20 or less on the surface of the antistatic layer;a difference in gloss level at 60° between one surface and the other surface of the polyester film is 5 to 80;the base material layer comprises a layer A and a layer B in a three-layer constitution of layer B/layer A/layer B;the layer A is a polyester composition layer including barium sulfate particles having an average particle size of 0.1 to 10 μm in an amount of 21 to 60% by weight relative to that of the layer A and/or rutile-type titanium dioxide particles having an average particle size of 0.1 to 5.0 μm in an amount of 1 to 40% by weight relative to that of the layer A;the layer B is a polyester composition layer including barium sulfate particles having an average particle size of 0.1 to 10 μm in an amount of 0.1 to 15% by weight relative to that of the layer B and/or rutile-type titanium dioxide particles having an average particle size of 0.1 to 5.0 μm in an amount of 1 to 15% by weight relative to that of the layer B; andthe layer A contains more inorganic particles than layer B.