| 摘要 |
A heat-recoverable article (2) with improved impact strength and increased resistance to swelling. The article is composed of a first backing layer (6), a second inner layer (8), and an optional adhesive layer (10), e.g. a hot-melt adhesive or a mastic. In one aspect, the article comprises a first layer (6), a second layer (8), and an adhesive (10) which is capable of swelling the first layer. In another aspect, the article has a thickness of 10x and comprises a first polymeric backing layer (6) which contains a particulate filler, and has a thickness which is at least 0.13 mm and is 1x to 5x, and a second polymeric inner layer (8) which contains substantially no particulate filler, and has a thickness of 5x to 9x. Also disclosed is an assembly in which an article of the invention is in contact with a substrate (4), e.g., a pipe, a pier, or a support element for a structure. Articles of the invention are particularly useful in protecting steel pipes and gas risers from corrosion in areas such as the splash zone (18) in which they are subject to heavy wave action.
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