| 摘要 |
Adhesive sheet particularly for sealing vessels and channels in which chemical, biological or biochemical reactions are conducted, composed of a backing film coated on one side with a pressure-sensitive adhesive, characterized in that the adhesive sheet has a transmittance of at least 89% (in the wavelength range between 450 to 750 nm) and a HAZE value of not more than 3% and the surface of the pressure-sensitive adhesive has a surface roughness Ra of not more than 0.03 μm and Rz of not more than 0.10 μm, the refractive index of the pressure-sensitive adhesive being less than 1.55, and the difference in the refractive indices of pressure-sensitive adhesive and of backing film being not more than 0.1.
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