The multipacks are obtained by grouping the bottles with a printed Stretch Sleeve made of elastic LDPE (low density polyethylene).
No glue or heat shrink are required.
The stretch sleeve is made of a tube of Linear Low Density Polyethylene film with very high elastic properties.
The tube is obtained off-line by folding and seaming continuously the printed stretch film.
This tube is then flattened and pre-perforated at a constant pitch, so to allow the stretch sleeve label tear- off in the multipack machine.
This converting process, made preliminarily by the sleeve supplier, produces a reel of pre-perforated sleeves to be loaded on our machines which are able to stretch and fit the labels on the containers.
Thanks to the elastic properties of the film, the stretch sleeve does not require any glue application or heat shrink process to fit perfectly to the containers shape..