To provide a joint sheet material for weather strips that can realize weather strips with good appearance and excellent corrosion resistance for car body panels.SOLUTION: There is provided a joint sheet material for weather strip 10 consisting of a composition containing at least EPDM, a cross-linking agent, and carbon black, with a volume resistivity of 1.0 x 106 Ω cm or higher based on the double ring electrode method (thickness of test specimen: 2 mm) of JIS-K6271-1:2015. When the composition is placed in a molding die and pressed at 50°C for 60 seconds at 100 Kgf/cm2 to produce a molded product, the thickness change rate of the molded product, expressed by the following equation (1): thickness change rate=[(thickness of molded product 30 minutes after press release minus thickness of molding die)/thickness of molding die]×100; is 100% or less.SELECTED DRAWING: Figure 1
【課題】見栄えがよく且つ車体パネルの防錆性に優れたウェザーストリップを実現することができるウェザーストリップ用の接合シート材を提供する。【解決手段】本発明により、少なくともEPDMと架橋剤とカーボンブラックとを含む組成物で、JIS−K6271−1:2015の二重リング電極法(試験片の厚さ:2mm)に基づく体積抵抗率が、1.0×106Ω・cm以上であり、前記組成物を成形型に配置し、50℃において100Kgf/cm2で60秒間プレス成形し、成形品を作製したときに、次の式(1):厚さ変化率=〔(プレス解放から30分後の成形品の厚み−成形型の厚み)/成形型の厚み〕×100;で表される前記成形品の厚さ変化率が、100%以下である、ウェザーストリップ10用の接合シート材が提供される。【選択図】図1
JOINT SHEET MATERIAL FOR WEATHER STRIP, WEATHER STRIP AND MANUFACTURING METHOD THEREOF
ウェザーストリップ用の接合シート材、ウェザーストリップ及びその製造方法
2021-11-18
Patent
Electronic Resource
Japanese
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