초록 ▼

An improved, coated microwaveable paperboard or container useful for forming substantially rigid food containers such as plates, bowls, trays and the like and a process from producing the improved, coated paperboard is provided. The microwaveable paperboard and food containers, at a temperature in e

An improved, coated microwaveable paperboard or container useful for forming substantially rigid food containers such as plates, bowls, trays and the like and a process from producing the improved, coated paperboard is provided. The microwaveable paperboard and food containers, at a temperature in excess of 430.degree. F. evolves less than 0.1 milligrams of benzene per square inch, preferably less than 0.04 milligrams. Said paperboard and food containers are produced from a sized paperboard blank wherein a base coat and top coat comprise a mixture of an inorganic pigment and aliphatic copolymers. A base coat comprising an aliphatic latex and a pigment is applied directly to the paperboard, and a top coat comprising the same or different aliphatic polymer latex and a pigment is applied directly to the base coat to form the coated containers. Microwave susceptor layers are coated on the top coat. These containers are used to microwave and brown food at temperatures in excess of 430.degree. F. without evolving more than 0.1 milligrams of benzene per square inch of the container surface. The coated containers are also characterized by improved grease, oil, and cut resistance, improved varnish gloss, enhanced smoothness, and improved printing quality.

대표청구항 ▼

[ I claim:] [1.] A microwaveable, food contact compatible, disposable, rigid and strong paperboard useful as a base stock for forming substantially high microwaveable food containers comprising:(a) a sized paperboard blank having a basis weight suitable for a food container;(b) a base coat coating a

[ I claim:] [1.] A microwaveable, food contact compatible, disposable, rigid and strong paperboard useful as a base stock for forming substantially high microwaveable food containers comprising:(a) a sized paperboard blank having a basis weight suitable for a food container;(b) a base coat coating applied to one or both surfaces of the paperboard blank, the base coat coating comprising a mixture of an inorganic pigment and an acrylic latex comprising aliphatic copolymers having the following monomers: [ STR 12 ] wherein R and R.sup.1 may be the same or different aliphatic hydrocarbons having one to six carbon atoms and the ratio of (i) to (ii) is in the range of 1:100 to 100:1;(c) a top coat coating layer applied to the base coat coating layer, the top coat coating layer comprising an inorganic pigment and an aliphatic polymer latex comprising aliphatic copolymers having the following monomers: [ STR 13 ] wherein R and R.sup.1 may be the same or different aliphatic hydrocarbons having one to six carbon atoms and the ratio of (i) to (ii) is in the range of 1:100 to 100:1; and wherein said coated microwaveable paper board evolves less than 0.1 milligrams of benzene per square inch of the paperboard surface at temperatures in excess of 430.degree. F. while exposed to microwave.