MATERIALS | FILM ADDITIVES
appeal and product shelf life. Fresh+ 1032 AF (1001032-E) is said to provide an attractive shelf appearance while its low coefficient of friction makes it highly suitable for the manufacturing of form, fill and seal (FFS) packaging. The additive can also be used in lidding applications. “Fresh+ 1032 AF (1001032-E) demonstrates excellent antifog
performance in barrier and non-barrier single
Above: Ampacet’s Fresh+ 1032AF masterbatch delivers antifog
performance with improved FFS processing
0.3-0.6% and 0.2-0.4%, respectively. Other grades offer similar efficiency in coextruded and laminated polyolefin packaging films. These include Einar 422 for demanding hot-fog conditions in the packaging of hot food and microwave-ready meals in PP film structures, and the Einar 632 custom-made ester blend for PE greenhouse films. For other packaging materials — such as PET, PS and some grades of BOPP — where internal migration is hindered by the crystallinity of the polymer or its chemical bonding to the additive, Palsgaard has developed Einar 1124. This is a solvent-free, water-based and thermally stable anti-fog coating, which can be applied by spray or roller and shows good performance in layers as thin as 25nm with surface concentrations from 50 to 150 mg/m².
Slip performance Masterbatch specialist Ampacet has introduced Fresh+ 1032 AF (1001032-E), a new speciality antifog masterbatch for polyethylene flexible applications. Ampacet says it also offers very good slip performance and machinability on packaging equipment. Applications for the new masterbatch are
foreseen in grocery packaging for washed, pre-cut and ready-to-eat vegetables and fruit. In this type of packaging, fog and water droplets can form on interior surfaces of the film, affecting both shelf
wrap films as well as in laminated film structures and provides outstanding slip properties (COF < 0.25) without the use of a migrating slip additive,” claims Ampacet.
Slip additives have been a speciality at Croda
for more than 50 years. The company recently created a number of externally-verified case studies to illustrate the sustainability benefits that can be achieved by using its slip products. One among them investigates the carbon footprint of the company’s Crodamide ER grade and the in-use sustainability benefit the additive can bring when used in LDPE film. “The externally verified Life Cycle Assessments
(LCA) of Crodamide ER shows that Crodamide ER has a negative carbon footprint, which means more CO2
is removed from the atmosphere than is
created during production,” the company says. “These results are possible due to the use of bio-based raw materials and more sustainable manufacturing processes. The raw material supply is also back integrated which means there is full transparency of the supply chain.”
Downgauging gains The thinner a film is, the more difficult it is to process and handle. To enable further down- gauging, more slip additive needs to be added to ease handling. “In our example, Crodamide ER enables the LLDPE film to be made 33% thinner, while maintaining the same slip performance and
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