B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 27/32 (2006.01) B32B 27/30 (2006.01) B65D 65/40 (2006.01) B65D 75/00 (2006.01)
Patent
CA 2207718
A heat-shrinkable film comprising a core layer comprising an ethylene-vinyl alcohol copolymer, two outer layers of blends comprising ethylene-vinyl acetate and ethylene-.alpha.-olefin copolymers, and two adhesive layers, characterized in that said film has a free shrink of at least 40 %, preferably at least 45 % and most preferably at least 50 %, in both dimensions at 120 ~C and a maximum shrink force in the transversal direction, throughout its range of shrink temperatures, not exceeding 0.5 N/cm. The film is suitable to package deformable articles such as trays to give a tight package without causing deformation.
Pellicule thermorétractable comportant une couche centrale faite d'un copolymère d'éthylène/alcool vinylique, de deux couches extérieures faites d'un mélange de copolymères d'éthylène/acétate de vinyle et d'éthylène/.alpha.-oléfine, et de deux couches adhésives, et caractérisée par son retrait à la chaleur d'au moins 40 % ou mieux de 45 % ou encore mieux de 50 % dans les deux dimensions à 120 ~C et par sa force de traction dans le sens transversal n'excédant pas 0,5 N/cm sur toute la plage des températures de retrait. Ladite pellicule convient pour l'emballage d'articles déformables tels que des barquettes; on obtient ainsi des paquets rigides sans causer de déformations.
Bax Serge
Ciocca Paolo
Mumpower Edward Lee
Cryovac Inc.
Smart & Biggar
W.r. Grace & Co.,-Conn.
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