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    • 47. 发明公开
    • Sealing sheet
    • 密封板
    • EP2749617A1
    • 2014-07-02
    • EP13198397.5
    • 2013-12-19
    • NITTO DENKO CORPORATION
    • Kabutoya, RyuuichiMuta, ShigekiSuzuki, MasatoshiHirose, TetsuyaInokuchi, Shinji
    • C09J7/02B32B7/12B32B27/08F16J15/10
    • C09J7/38B32B7/06B32B7/12B32B27/08B32B27/32B32B27/36B32B2307/3065B32B2307/7244B32B2307/748B32B2605/08B32B2605/10B32B2605/18C09J7/22C09J7/29C09J2201/128C09J2201/606C09J2201/622C09J2423/106C09J2427/006C09J2467/006C09J2471/00Y10T428/2848
    • The present invention provides a sealing sheet mainly composed of an adhesive sheet composed of a core film having a water vapor transmission rate of less than 7.5 g/100 sq. in 24 hr as measured by a method according to JIS Z 0208, and a Relaxation rate of not less than 10% as measured by the following bending-stress relaxation rate measurement test, and an adhesive layer formed on both surfaces of the core film:
      [bending-stress relaxation rate measurement test]
      (1) a core film is cut into a tape (width 20 mm, length 100 mm), the tape is rolled to form a loop with one surface thereof being inside, one end (10 mm) of the rolled tape is laid on top of the other and fixed with an adhesive tape to give a loop sample,
      (2) the loop sample is put on a balance, and pressed with a flat plate surface of the jig such that the distance between the flat plate surface and the balance is 20 mm to deflect the loop sample, and
      (3) from the start of pressing, the weight of the loop sample is measured by the balance, a ratio of the weight of the loop sample at 60 seconds from the start of pressing to the weight of the loop sample at 0 second therefrom is calculated based on the following calculation formula, and the obtained rate is taken as the relaxation rate. relaxation rate % = 1 - F 60 - W / F 0 - W × 100
      F 0 : weight at 0 second from the start of pressing
      F 60 : weight at 60 seconds from the start of pressing
      W: sample weight
    • 本发明提供一种密封片,该密封片主要由根据JIS Z 0208方法测定的由在24小时内水蒸气透过率小于7.5g / 100平方的芯膜构成的粘合片构成, 通过以下的弯曲应力松弛率测定试验测定的比例为10%以上,并且在芯膜的两面形成有粘合剂层:[弯曲应力松弛率测定试验](1)将芯膜切断 制成带(宽20mm,长100mm),将带卷成一个内表面的环,将带卷的一端(10mm)重叠在另一端上并用粘合剂固定 (2)将环形样品放在天平上,并用夹具的平板表面挤压,使平板表面和天平之间的距离为20mm以使环形样品偏转, 和(3)从按压开始,环路样本的重量通过 根据下面的计算公式计算从按压开始起60秒处的环路样品的重量与0秒处的环路样品的重量的比例,并且将所获得的速率作为松弛率 。 松弛率%= 1-F60-W / F0-W×100 F0:从按压开始0秒时的重量F60:从按压开始起60秒时的重量W:样品重量
    • 49. 发明公开
    • WATER-DISPERSING ACRYLIC ADHESIVE COMPOSITION AND ADHESIVE SHEET
    • 在高分辨率分辨率的ACRYLHAFTMITTELZUSAMMENSETZUNG UND HAFTFOLIE DARAUS
    • EP2562228A1
    • 2013-02-27
    • EP11771902.1
    • 2011-04-12
    • Nitto Denko Corporation
    • MORIMOTO, YuAMANO, TatsumiMITSUI, KazumaYONEZAKI, KousukeTAKASHIMA, KyokoTAKASHIMA, Atsushi
    • C09J133/00C09J7/02C09J11/06C09J171/02
    • C09J143/02C08F2220/1858C08L33/06C09J7/38C09J133/10C09J171/02C09J2203/318C09J2433/00C09J2471/00Y10T428/2887Y10T428/2891C08F220/14C08F220/06
    • Provided is a water-dispersible acrylic pressure-sensitive adhesive composition capable of forming a pressure-sensitive adhesive layer which is resistant to increase in adhesive strength with time, has a good appearance, and less stains an adherend. The water-dispersible acrylic pressure-sensitive adhesive composition includes an acrylic emulsion polymer; and a water-insoluble crosslinking agent having two or more carboxyl-reactive functional groups per molecule. The acrylic emulsion polymer is formed from constitutive monomers essentially including a (meth)acrylic alkyl ester (A), a carboxyl-containing unsaturated monomer (B), and at least one monomer (C) selected from methyl methacrylate, vinyl acetate, and diethylacrylamide and has a solvent-insoluble content of 70 percent by weight or more. When the acrylic pressure-sensitive adhesive composition is applied so as to have a dry thickness of 50 µm, dried at 120°C for 2 minutes, and aged at 50°C for 3 days to give a cross-linked acrylic pressure-sensitive adhesive film, the film has a solvent-insoluble content of 90 percent by weight or more and an elongation at break of 130% or less at 23°C.
    • 本发明提供一种能够形成耐粘合强度随时间增加的粘合剂层的水分散性丙烯酸类压敏粘合剂组合物,具有良好的外观,并且较少污染被粘物。 水分散性丙烯酸类压敏粘合剂组合物包括丙烯酸乳液聚合物; 和每分子具有两个以上羧基反应性官能团的水不溶性交联剂。 丙烯酸乳液聚合物由主要包含(甲基)丙烯酸烷基酯(A),含羧基不饱和单体(B)和至少一种选自甲基丙烯酸甲酯,乙酸乙烯酯和二乙基丙烯酰胺的单体(C))的组成单体形成 并且溶剂不溶物含量为70重量%以上。 当丙烯酸类压敏粘合剂组合物施加到干燥厚度为50μm时,在120℃下干燥2分钟,并在50℃下老化3天,得到交联的丙烯酸类压敏粘合剂 薄膜,在23℃下,溶剂不溶物含量为90重量%以上,断裂伸长率为130%以下。