The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 27, 2021
Filed:
Sep. 09, 2016
Sekisui Chemical Co., Ltd., Osaka, JP;
Tatsuya Iwamoto, Kouka, JP;
Nami Minakuchi, Kouka, JP;
SEKISUI CHEMICAL CO., LTD., Osaka, JP;
Abstract
There is provided an interlayer film for laminated glass with which the sound insulating properties in a high frequency area of 2000 Hz or more can be effectively enhanced. The interlayer film for laminated glass according to the present invention has a two or more-layer structure and is provided with a first layer containing a thermoplastic resin and a second layer containing a thermoplastic resin, the second layer is arranged on a first surface side of the first layer, and the interlayer film is provided with Constitution A: 'the glass transition temperature of the second layer being 32° C. or more, the glass transition temperature of the first layer being lower than the glass transition temperature of the second layer, and the thickness of the interlayer film being more than 787 μm and 950 μm or less' or Constitution B: 'the glass transition temperature of the second layer being 25° C. or more, the glass transition temperature of the first layer being lower than the glass transition temperature of the second layer, and the thickness of the interlayer film being more than 950 μm'.