MATERIALS | MULTI-LAYER FILM
Right: Camvac’s new Extrapet lidding film is made from 60% PCR
designed for low-range and high-flow production. Some machines include in-line printing and welding to increase production yield. The machine consists of four heads with an output of 6,400 bags per minute.
Better barrier Nova Chemicals says that its latest Surpass grade of HDPE resin offers a high level of moisture barrier performance for multilayer flexible packaging. Designed for blown-film applications the grade claims to deliver a 20% increase in water vapour transmission performance in multilayer coextruded film structures compared to its earlier HPs167-AB grade. As well as its moisture barrier, Surpass HPs267-AB offers high stiffness and heat resistance, allowing packaging engineers to design more recy- clable PE film structures. Potential advantages include longer shelf life, reduced material costs through downgauging and the ability to create more recyclable packaging – with a mono-material solution.
“Our barrier product development team has
created an HDPE resin with a novel molecular structure,” said Eric Vignola, food packaging market manager at Nova Chemicals. “It sets a new standard for moisture barrier performance that extends beyond what most industry experts thought was possible.”
All-PET lidding UK-based Camvac has developed a PET barrier lidding film made from 60% post-consumer recyclate. The new film, Extrapet PCR, has been developed
to meet growing demand for more sustainable lidding film. It has an all-PET structure and has high gas barrier performance – to both oxygen and moisture, as required for MAP and CAP packaging applications. Applications include processed and fresh meat, pasta and baked goods, where presen- tation and fresh appearance are critical. Available in peel or weld seal laminate structures, the mono-material lidding film offers good sealing properties and barrier performance. At the same time, its appearance is not hampered by using PCR, says the company – with no yellow hints visible. “Extrapet traditionally provides packaging solutions in peel and non-peel, anti-fog, and high barrier options,” said Gary Chalkley, development director at Camvac. “A PCR-based film boosts the film’s environmental attributes.” The peelable Extrapet PCR is available as an adhesive laminate of 12-20 micron polyester. Total PCR content makes up 62% of the laminate structure. Because the ExtraPET range is all-polyes-
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IMAGE: CAMVAC foodgrade without compromise
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