摘要:
Provided is a double-sided pressure-sensitive adhesive tape for fixing a flexible printed circuit board superior in adhesive power after bonding under low pressure and also in repelling resistance after processing in high-temperature steps. The double sided pressure-sensitive adhesive tape for fixing a flexible printed circuit board according to the present invention has a 180° peel adhesion, as determined by bonding the adhesive tape onto a stainless steel plate under pressure by one reciprocation of a 10-g roller, leaving it still for 5 minutes and measuring it at a tensile speed of 300 mm/minute, of 6.5 N/20 mm or more and a terminal separation distance after reflow of 2.5 mm or less.
摘要:
Disclosed is a double-coated pressure-sensitive adhesive sheet which includes at least a pressure-sensitive adhesive unit including a plastic base film and, present on or above both surfaces thereof, pressure-sensitive adhesive layers; and non-silicone release liners present on both surfaces of the pressure-sensitive adhesive unit. The pressure-sensitive adhesive layers are each formed from an acrylic polymer containing, as essential monomer components, an alkyl (meth)acrylate whose alkyl moiety being a linear or branched-chain alkyl group having 2 to 14 carbon atoms and a polar-group-containing monomer. The pressure-sensitive adhesive unit has a thickness of 60 to 160 μm, and each of the two pressure-sensitive adhesive layers of the pressure-sensitive adhesive unit has a thickness of 20 μm or more. The adhesive sheet excels in processability and fittability around bumps and is usable for fixing a flexible printed circuit board or for fixing a hard disk drive component.
摘要:
The present invention provides a thermosetting adhesive tape or sheet having a thermosetting adhesive layer, which can be stored stably at room temperature, and, when thermally cured, can exert excellent adhesiveness and high thermal stability after exposure to heat and moist, because the resin in the adhesive rapidly reacts upon curing. The thermosetting adhesive tape or sheet according to the present invention includes a thermosetting adhesive layer which has a gel fraction of less than 70%, a difference in gel fraction between before and after storage at 40° C. for 7 days [(gel fraction after storage at 40° C. for 7 days)−(gel fraction before storage at 40° C. for 7 days)] of 15% or less, and a gel fraction after curing at 150° C. for 1 hour of 90% or more.
摘要:
Disclosed is a double-sided pressure-sensitive adhesive sheet for fixing a flexible printed circuit board, which has silicone release liners, but is less polluting and excels in workability. The double-sided pressure-sensitive adhesive sheet for fixing a flexible printed circuit board includes at least a pressure-sensitive adhesive unit including a substrate and pressure-sensitive adhesive layers present on or above both sides of the substrate; and silicone release liners present on or above both surfaces of the pressure-sensitive adhesive unit, in which the pressure-sensitive adhesive layers each include an acrylic polymer based on, as an essential monomer component, an alkyl (meth)acrylate whose alkyl moiety being a linear or branched-chain alkyl group having 1 to 14 carbon atoms, the pressure-sensitive adhesive unit has a thickness of 60 μm or less, and the adhesive sheet evolves siloxane gas, if any, in an amount of 1 ng/cm2 or less when heated at 120° C. for 10 minutes.
摘要翻译:公开了一种用于固定具有硅氧烷剥离衬垫但具有污染性和可加工性优异的柔性印刷电路板的双面压敏粘合片。 用于固定柔性印刷电路板的双面压敏粘合片包括至少一个压敏粘合剂单元,其包括基材和存在于基材的两面上方的压敏粘合剂层; 和存在于压敏粘合剂单元的两个表面上方或上方的硅氧烷剥离衬垫,其中压敏粘合剂层各自包含基于作为必需单体组分的(甲基)丙烯酸烷基酯的丙烯酸类聚合物,其烷基部分为 具有1〜14个碳原子的直链或支链烷基,所述压敏粘合剂单元的厚度为60μm以下,并且所述粘合片以1ng / cm 2的量放出硅氧烷气体(如果有的话),或 在120℃加热10分钟时较少。
摘要:
Provided is a thermosetting adhesive tape or sheet resistant to deposition of foreign matter such as dust and dirt to the thermosetting adhesive layer surface.An adhesive tape or sheet for a flexible printed circuit board including a thermosetting adhesive layer, and a release liner on at least one surface of the thermosetting adhesive layer, wherein the arithmetic mean roughness (Ra) of the at least one surface of the release liner is 0.6 μm or more and less than 20 μm and the surface (at least one surface) of the release liner having an arithmetic mean roughness (Ra) of 0.6 μm or more and less than 20 μm is in contact with the surface of the thermosetting adhesive layer.