Heat shrinkable foamed sheet

Details Heat shrinkable foamed sheet Heat shrinkable foamed sheet

B - Operations, Transporting

32

B

B32B 5/20 (2006.01) B32B 33/00 (2006.01) B65D 6/32 (2006.01)

Patent

CA 2600559

In some preferred embodiments, a heat shrinkable foamed sheet has a foamed layer (2) constituting a core layer, and a non-foamed layer (3) constituting a surface skin layer integrally formed on the formed layer. The non-foamed layer (3) is less than about 1.55 µm in maximum surface smoothness measured in accordance with ISO8791-4. Alternatively, by regulating various dimensions of foam cells formed in the foamed layer (2) so as to fall within predetermined ranges, a heat shrinkable foamed sheet excellent in surface smoothness and printing nature can be obtained.

L'invention concerne, dans certains modes de réalisation préférés, une feuille de mousse thermorétractable ayant une couche de mousse (2) constituant la couche principale et une couche sans mousse (3) constituant une couche de peau de surface solidaire de la couche de mousse. La couche sans mousse (3) a un lissé maximal de surface inférieur à environ 1,55 µm selon ISO8791-4. En variante, un réglage de différentes dimensions des cellules de mousse formées dans la couche de mousse (2) pour qu'elles se trouvent dans des plages prédéterminées permet d'obtenir une feuille de mousse thermorétractable dotée d'un lissé de surface et d'une aptitude à l'impression d'un excellent niveau.

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