Polyolefi ns | materials feature
Polyolefi n fi lm was very much in evidence at K2013. Here, we round up some of the highlights, from medical fi lm to extrusion coating
the grade Making
Polyolefi ns are adaptable materials, fi nding applications everywhere from blown fi lm to coatings, and in industries from food packaging to medical products. With K2013 not yet a distant memory, it’s not surprising that many of the most recent advances were fi rst seen at the show. LyondellBasell added to its Toppyl family of
polyolefi n resins for food packaging, with a grade that provides extra convenience to ready-to-eat products – while maintaining protection. Toppyl RC3000 is formulated to stick directly to
traditional polyethylene (PE) food containers, providing a strong seal to keep foods fresh, but it still easy to open and close. It eliminates the need for food packag- ing made with hot melt adhesive, which can make opening packages diffi cult. “Today’s packaging must be practical, effective, safe and easy to open without the need for a cutting instrument,” said Stefano Pasquali, marketing manager for PB-1 specialities at the company. “Toppyl RC3000 provides a strong seal to keep foods fresh for easy storage and handling of delicate food, including meat, fruit, vegetable and cheese.” Packaging made with the material recloses easily
and remains sealed. Product testing by a large fi lm producer showed that food packaging successfully opened and closed with the same success after 10 uses, as compared to its fi rst usage. The material also satisfi es all food contact require- ments in Europe, says LyondellBasell. Also in food packaging, Topas introduced a new
grade of its cyclic olefi n copolymer (COC), which has a combination of high heat stability and robust extrusion performance. Topas 7010F-600 has a glass transition temperature
www.fi lmandsheet.com January/February 2014 | FILM & SHEET EXTRUSION 33
of 110°C, putting it between Topas 8007 (80°C) and 6013 (140°C). It is aimed at multilayer food packaging. The material does not require pre-drying and can
run on blown fi lm systems with or without grooved feed extruders at process temperatures of 230°C or above. It can also be processed on cast fi lm lines with low haze over a wide temperature range. The material is typically used in multilayer struc-
tures with polyolefi ns and barrier resins such as polyamide (PA) and ethylene vinyl alcohol (EVOH). It is used to produce a range of multilayer packaging fi lm applications including metallised fi lm, twist fi lm, hot fi ll, and shrink labels in thicknesses up to 100 microns. It can be processed on conventional extrusion equipment, providing transparent, defect-free fi lm. The material complies with US Food & Drug Administration (FDA) food contact regulations. “This fi lls a gap in our portfolio by offering the
CT7200, an LDPE from
Borealis, is for extrusion coating
Lumicene Supertough 32ST05 could make fi lms 25% thinner and stronger
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