Polypropylene-based resin grades offer benefits to frozen packers.

Basell Polyolefins is now producing polypropylene-based resin grades that have withstood freezer temperatures of down to minus 40[degrees] F. Previously, food packaging polypropylene grades could only withstand refrigerated temperatures without cracking or breaking on impact.

"These resins

Pro-fax EP390S high impact polypropylene copolymer (opaque) resin and Clyrell EC140R polyolefin (transparent) resin are available to producers of injection molded tubs, trays and cups ranging from 4-ounces to 1.75-quart (1.65 liter). Both grades can withstand microwave temperatures and are dishwasher safe.

Pro-fax EP390S offers high (35 dg/min) melt flow with exceptional drop test characteristics.

Clyrell EC140R provides an unprecedented combination of random and impact copolymer advantages. The resin exhibits good transparency, good impact, high gloss and high melt flow (30 dg/min) properties, as well as outstanding resistance to stress whitening.

Containers produced using Pro-fax EP390S and Clyrell EC140R can take advantage of in-mold labeling technology, which enables labels to be printed directly onto polypropylene film and other flexible structures. The end result is improved graphic reproduction, when compared to paper-based containers or labels typically used for packaging ice cream and other frozen products.

"Food marketers want to create more value for their product at the point-of-purchase. These new polypropylene alternatives--coupled with an in-mold label--can help them achieve the differentiation desired," said McKeeman.

Both grades offer superior 'snap fit' for lids--even at freezer temperatures. Optional tamper-evident breakaway tabs can also be engineered into the lid to produce an additional differentiating feature.

For more information, contact the Elton, Maryland, USA-based company by phoning +1 410-996-1366.