PROBLEM TO BE SOLVED: To provide a laminate excellent in sound insulation performance, capable of suppressing reduction of sound insulation performance in a high frequency area due to a coincidence phenomenon.SOLUTION: A laminate comprises: an A layer formed of a resin composition which has a peak in which tanδ measured by a heterocyclic shear viscosity test with a condition of a frequency 1 Hz according to JIS K 7244-10, in a range of -40 to 30°C; and plural B layers, in which the A layer is laminated between at least two B layers. When the laminate is sandwiched with two float glasses whose vertical length is 300 mm, lateral length is 25 mm, and thickness is 1.9 mm, a loss coefficient in a quartic resonance frequency measured by a central excitation method at 20°C, is 0.2 or more, and bending rigidity in the quartic resonance frequency calculated according to ISO16940(2008) is 150 N m or more.SELECTED DRAWING: Figure 1
【課題】コインシデンス現象による高周波域での遮音性能の低下を抑制した、遮音性に優れる積層体を提供することを目的とする。【解決手段】JIS K 7244−10に準じて周波数1Hzの条件で複素せん断粘度試験を行うことで測定されるtanδが最大となるピークを−40〜30℃の範囲に有する樹脂組成物からなるA層と、複数のB層とを有する積層体であって、少なくとも二つのB層の間にA層が積層され、縦300mm、横25mm、厚さ1.9mmのフロートガラス2枚で該積層体を挟んだ際に、20℃で中央加振法により測定される4次共振周波数での損失係数が0.2以上かつISO16940(2008)に準じて算出される該4次共振周波数での曲げ剛性が150N・m以上である積層体。【選択図】図1
LAMINATE AND GLASS LAMINATE
積層体及び合わせガラス
2016-06-20
Patent
Electronic Resource
Japanese
IPC: | B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM , Schichtkörper, d.h. aus Ebenen oder gewölbten Schichten, z.B. mit zell- oder wabenförmiger Form, aufgebaute Erzeugnisse / B60J WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES , Fenster, Windschutzscheiben und bewegbare Dächer, Türen oder Ähnliches für Fahrzeuge / C03C Chemische Zusammensetzungen für Gläser, Glasuren oder Emails , CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS |
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