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Chemistry of pressure-sensitive adhesives : ウィキペディア英語版 | Chemistry of pressure-sensitive adhesives The chemistry of pressure-sensitive adhesives describes the chemical science associated with pressure-sensitive adhesives. PSA tapes and labels have become an important part of everyday life. These rely on adhesive material affixed to a backing such as paper or plastic film. Because of the inherent tackiness of the adhesive material and low surface energy, these tapes can be placed onto a variety of substrates when light pressure is applied, including paper, wood, metals, and ceramics. The design of tapes requires a balance of the need for long service life and adaptation to a variety of environmental and human effects, including temperature, UV exposure, mechanical wear, contamination of the substrate surface, and adhesive degradation.〔Werner Karmann and Andreas B. Kummer "Tapes, Adhesive" in Ullmann's Encyclopedia of Industrial Chemistry, Wiley-VCH, Weinheim, 2000. 〕 == Composition == A typical PSA tape consists of a pressure sensitive adhesive (the sticky part of the tape) coated to a backing material. To prevent the adhesive from sticking to the backing when wound in a roll, a release agent is applied to the backing or a release liner is placed on the adhesive. Sometimes a primer is coated between the adhesive and backing increase the bond.
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