Thermoformed food containers with enhanced rigidity

Details Thermoformed food containers with enhanced rigidity Thermoformed food containers with enhanced rigidity

C - Chemistry, Metallurgy

08

L

C08L 23/12 (2006.01) C08K 3/22 (2006.01) C08K 3/26 (2006.01) C08K 3/34 (2006.01) C08L 23/06 (2006.01)

Patent

CA 2701564

A thermoformed disposable food container has a wall caliper of from about 10 to about 80 mils consisting essentially of from about 30 to about 80 percent by weight of a matrix polymer composition consisting predominantly of a polypropylene polymer and optionally including a polyethylene polymer, from about 10 to about 50 percent mica, from about 2.5 to about 25 percent calcium carbonate, and up to about 5 weight percent titanium dioxide, exhibits enhanced rigidity when the calcium carbonate has a mean particle size of less than about 8 microns. The extrudable compositions are likewise useful for film, sheet and injection molding applications.

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