Laminated glass and interlayer film for laminated glasses
AssigneeSekisui Chemical Co., Ltd.
InventorsJuichi Fukatani, Toshio Tada, Tsuyoshi Hasegawa, Masaki Matsudo
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Abstract
A laminated glass and an interlayer film for laminated glasses are provided, which have the high performance for mitigating the impact given externally and, particularly in the case of using it as glass for vehicles, and which have the high performance for mitigating the impact when a person's head comes into collision with the glass due to the occurrence of a personal accident. Also provided is a laminated glass, wherein at least an interlayer film for laminated glasses and a glass sheet are laminated and unified, Head Injury Criteria (HIC) values, measured according to regulations of European Enhanced Vehicle-safety Committee; EEVC/WG 17, being 1,000 or lower.
Claims12
An interlayer film for laminated glasses, wherein a break of 10 mm or longer in length is generated when a laminated glass is formed by sandwiching the interlayer film for laminated glasses between two glasses and a Head Injury Criteria (HIC) value of the laminated glass is measured,
- which has a three-layers structure, a storage elasticity modulus G′ at 20° C. and a frequency of 5.0×101 to 1.0×102 Hz in an intermediate layer being at or below a half of a storage elasticity modulus G′ at 20° C. and a frequency of 5.0×101 to 1.0×102 Hz in one or any of two layers composing the outermost layer,
- wherein a thickness of one outermost layer being 1.2 or more times larger than that of the other outermost layer.
An interlayer film for laminated glasses, wherein a break of 10 mm or longer in length is generated when a laminated glass is formed by sandwiching the interlayer film for laminated glasses between two glasses and a Head Injury Criteria (HIC) value of the laminated glass is measured,
- which has a three-layers structure, a storage elasticity modulus G′ at 20° C. and a frequency of 5.0×101 to 1.0×102 Hz in one or any of two layers composing the outermost layer being at or below a half of a storage elasticity modulus G′ at 20° C. and a frequency of 5.0×101 to 1.0×102 Hz in an intermediate layer, wherein a thickness of one outermost layer being 1.2 or more times larger than that of the other outermost layer.
An interlayer film for laminated glasses, wherein a break of 10 mm or longer in length is generated when a laminated glass is formed by sandwiching the interlayer film for laminated glasses between two glasses and a Head Injury Criteria (HIC) value of the laminated glass is measured,
- which has a multilayer structure of four-layers or more, a storage elasticity modulus G′ at 20° C. and a frequency of 5.0×101 to 1.0×102 Hz in at least one layer of an intermediate layer being at or below a half of a storage elasticity modulus G′ at 20° C. and a frequency of 5.0×101 to 1.0×102 Hz in one or any of two layers composing the outermost layer,
- wherein a thickness of one outermost layer being 1.2 or more times larger than that of the other outermost layer.
Dependencies are inferred from the claim text.