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:
Jan. 21, 2014
Filed:
Dec. 28, 2010
Tatsuya Iwamoto, Kouka, JP;
Kohei Kani, Kouka, JP;
Tatsuya Iwamoto, Kouka, JP;
Kohei Kani, Kouka, JP;
Sekisui Chemical Co., Ltd., Osaka, JP;
Abstract
The present invention provides an interlayer film for a laminated glass which can suppress bubble formation and bubble growth in the laminated glass. An interlayer filmfor a laminated glass includes a first layerand a second layerlaminated on one faceof the first layer. Each of the first layerand the second layercontains a polyvinyl acetal resin and a plasticizer. In the case of measuring viscoelasticity of a resin film (glass transition temperature: Tg (° C.)) formed from the first layeror a resin film (glass transition temperature: Tg (° C.)) formed with 100 parts by weight of the polyvinyl acetal resin contained in the first layerand 60 parts by weight of a plasticizer of triethylene glycol di-2-ethylhexanoate (3GO), the resin film has an elastic modulus of G'(Tg+80) at (Tg+80)° C. and an elastic modulus of G′(Tg+30) at (Tg+30)° C., and provides a ratio (G′(Tg+80)/G′(Tg+30)) of 0.65 or higher.