3m Innovative Properties Company

Mary E Johansen

Moses Mekala David

Timothy J Hebrink

Vivian Wynne Jones

Haiyan Zhang

Derek J Dehn

Michelle M Mok

James P Burke

Todd G Pett

Lon R Johnson

Stephen A Johnson

Mario Alberto Perez

Ta-Hua Yu

Rajdeep S Kalgutkar

Paul T Hines

Sebastian Goris

Vivan W Jones

Lesbia E Giron

A composite cooling film comprises an ultraviolet-reflective multilayer optical film and a reflective microporous layer secured thereto. The ultraviolet-reflective multilayer optical film is at least 50 percent reflective of ultraviolet radiation over a majority of the wavelength range of at least 340 but less than 400 nanometers. The reflective microporous layer has a continuous phase comprising a nonfluorinated organic polymer and is diffusely reflective of solar radiation over a majority the wavelength range of 400 to 2500 nanometers, inclusive. The composite cooling film has an average absorbance over the wavelength range of 8 to 13 microns of at least 0.85. An article comprising the composite cooling film adhered to a substrate is also disclosed.

Composite cooling film and article including the same

A composite cooling film () comprises an antisoiling layer () secured to a first major surface of a reflective microporous layer (). The reflective microporous layer () comprises a first fluoropolymer and is diffusely reflective of electromagnetic radiation over a majority of wavelengths in the range of 400 to 2500 nanometers. The antisoiling layer () has an outwardly facing antisoiling surface () opposite the micro-voided polymer film. An article () comprising the composite cooling film () secured to a substrate () is also disclosed.

A multilayer film comprises first, second, and third layers. The first layer comprises at least one aromatic polyester, and has a loss modulus at 1 hertz and 25&#xb0; C. of at least 70 megapascals. The second layer is thermoplastic and has a loss modulus at 1 hertz and 25&#xb0; C. of less than or equal to 60 megapascals and comprises a thermoplastic elastomer and a polyamide. The third layer contacts the second layer opposite the first layer and has a loss modulus at 1 hertz and 25&#xb0; C. of at least 70 megapascals. The second layer is sandwiched between the first and third layers. A method of making the multilayer film by coextrusion is also disclosed.

Multilayer film and method of making the same

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Woodbury, MN, United States of America

Mary E Johansen