Canadian Plastics

Materials (June 01, 2004)

Canadian Plastics   



TPU enables faster cycle times...

TPU enables faster cycle times

BASF has added its Elastollan B-Series to the family of thermoplastic polyurethane (TPU) resins the company offers to the North American market. Developed and manufactured in Germany, these innovative TPUs have been commercially available in Europe and Asia.

The Elastollan B-Series of TPUs are based on advanced chemistry that enables 20% to 40% faster injection molding cycle times compared with conventional TPU products, depending on part thickness, with no tooling modifications needed. Other performance benefits of the Elastollan B-Series include excellent abrasion resistance, flexibility and toughness.

Typical injection molded applications for these resins include sports and recreation equipment, such as ski goggles and golf cleats. Elastollan B-Series resins can also be extruded into TPU films for pneumatic tubing, fabric coating and industrial part end uses.

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BASF Canada Inc. 800-267-2955

Decorating solutions for acetal

DuPont has opened up new coloring possibilities for acetals with the development of paintable and platable grades of Delrin acetal. “Delrin was traditionally very difficult to paint or glue because of its semi-crystalline nature,” explains Bob Weckman, senior technical consultant, DuPont Canada. “This opens up the possibility of metallic finishes, and smaller batches of colored parts.”

The Delrin Decorating Solutions system consists of specially developed grades of Delrin acetal, a DuPont etching solution and three DuPont coatings.

Weckman notes that the automotive industry has often expressed an interest in chrome- platable crystalline resins for parts such as door handles.

DuPont Canada Inc. 800-268-3943

Stretch hood packaging presents opportunity for extruders and retailers

ExxonMobil and a packaging machinery supplier are working together to bring stretch hood packaging to palletized merchandise in North America. Using ExxonMobil’s Nexx-star resin structures, the stretch hood film offers cost benefits, superior toughness and exceptional optical properties for “end-of-the-line” packaging applications.

Potential applications include replacing corrugated for protecting appliances during shipping, and replacing other pallet wraps for palletized merchandise displayed in retail settings, such as pallets of bagged garden supplies or pallets of dry goods in “big box” stores.

Stretch hood packaging is pulled over the load by a stretch hood machine, like a sock being pulled onto your foot. “It offers five-sided protection,” explains Per Lachenmeier, president of packaging machinery supplier Lachenmeier. “Existing films don’t have good optics for this type of application, and the way they hold the load is not good enough.”

The advanced co-extrusion packaging solution is effective for a myriad of load types — even traditionally unstable loads — such as appliances; beverages and other bottled goods; building materials including bricks and cement; chemicals and polymers; and foods and consumer products.

The Nexxstar resin structure is a coextrusion of ExxonMobil’s Exceed metallocene PE and Escorene Ultra copolymer resins. The use of Escorene Ultra low EVA resin brings outstanding holding strength even at high temperatures.

Dan Schussler, global PE film market segment manager for ExxonMobil Chemical, says stretch hood packaging is just one of several applications the company is exploring. “More converters are investing in co-extrusion lines. Our film customers have been asking us to develop application solutions for co-ex structures, so we developed Nexxstar. We are investigating other segments that would use Exceed metallocene and co-ex structures, and which show significant growth potential for plastics.”

According to ExxonMobil and Lachenmeier, Nexxstar stretch hood solutions can lower operating costs by as much as 30% through downgauging; by providing better puncture and tear resistance that leads to less product damage; and by improving clarity, which enables easier reading of bar codes and permits product branding without additional labels.

ExxonMobil / Imperial Oil 800-668-0177

Conductive nylon suits fuel systems

Atofina’s new grade of conductive polyamide, Rilsan M-BESN Black P 212 CTL, was specifically developed for the automotive market. It fulfils the requirements for fuel systems specified by the SAE* J2260 standard.

According to Atofina, this material is the first PA 11 to meet the conductivity requirements of American carmakers (surface resistivity below 106 Ohms). The Rilsan grade offers superior hydrocarbon and alcohol resistance, good mechanical strength without reinforcement, and good low temperature performance. It is generally processed by extrusion to form both corrugated and smooth tubing, in either mono- or multi-layer formats.

Atofina Canada Inc. 800-567-5726

Monolayer PET with improved barrier properties

KoSa Polyshield polyethylene terephthalate (PET) can be used to make amber or green monolayer barrier bottles that are transparent, glossy and recyclable into the colored streams. It produces bottles with improved O2 and CO2 barriers without the need for secondary coating processes or multi-layer construction.

“PolyShield is a breakthrough for the beer bottle market,” says Kevin Fogarty, president, polymers and intermediates, KoSa. “This monolayer product will provide the shelf life beer bottles require without the conversion headaches.”

KoSa 704-586-7501

Red pigment gets FDA approval

Pigment Red 122 from Clariant recently received approval from the US Food and Drug Administration (FDA) for use in plastics for food contact applications. Clariant’s PV Fast Pink E and PV Fast Pink E01 are now among the few pigments with Colour Index P.R.122 that meet the FDA standard for consumer goods, toys and applications involving contact with food. Both these high-fastness quinacridone pigments are suitable for a wide range of applications and provide superior technical properties.

PV Fast Pink E and PV Fast Pink E01 are easy to process and have outstanding dispersibility. Other properties include good migration behavior and superior temperature and weathering resistance. The two pigments also do not influence warpage in semi-crystalline plastics, an important property for packaging and closures.

Clariant Canada Pigments & Additives 888-666-6485

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