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269results about "Signboards" patented technology

White laminated polyester film for reflecting sheet

[Object] In light of the problems in the prior art, an object of the invention is to provide a white laminated polyester film for a reflective plate sheet, which has a high reflectance and a high concealing property compatible with each other, and is not easily broken and is high in productivity.
[Solving means] A white laminated polyester film for a reflecting sheet, including a polyester layer (B) containing voids therein, and a polyester layer (A) laminated at least on one surface side of the layer (B), the laminated polyester film satisfying the following (1) to (5): (1) the thickness of the polyester layer (A) laminated at least on one surface side is from 5 to 15 μm; (2) the polyester layer (A) contains therein particles having a refractive index of 2.0 or more in an amount of 3 to 15% by weight of the polyester layer (A); (3) the thickness of the polyester layer (B) is 150 μm or more; (4) the amount of particles having a refractive index of 2.0 or more contained in the polyester layer (B) is 2% or less by weight of the polyester layer (B); and (5) the polyester layer (B) contains therein a resin which is not soluble in polyester resin in an amount of 12 to 25% by weight of the polyester layer (B) and/or inorganic particles having a refractive index less than 2.0 in an amount of 30 to 50% by weight of the polyester layer (B).
Owner:TORAY IND INC
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