Process for introducing an additive into a polymer melt
First Claim
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1. A method of producing packaging for meat comprising:
- introducing a first polymer into an extruder;
introducing a masterbatch of an additive containing polymer into the extruder to form a polymer blend;
wherein the additive is an NO donating compound;
wherein the masterbatch is made bya) heating a base polymer to a temperature above a melting point of the base polymer to form a polymer melt;
b) introducing into the polymer melt a solution comprising a salt and water;
c) mixing the solution with the polymer melt in the extruder to form a blend;
d) allowing at least a portion of the water to vaporize and to vent from the extruder; and
e) extruding the blend to form the masterbatch; and
forming a packaging film from the masterbatch containing blend; and
fabricating the film into a package, wherein the film forms an inner layer of the package.
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Abstract
A process includes introducing a base polymer into an extruder, heating to a temperature sufficient to form a polymer melt, introducing a liquid such as water including an additive with mixing and subsequent vaporization and venting of the liquid to produce an extrudate having a uniform distribution of preferably uniformly small additive particles.
31 Citations
6 Claims
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1. A method of producing packaging for meat comprising:
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introducing a first polymer into an extruder; introducing a masterbatch of an additive containing polymer into the extruder to form a polymer blend;
wherein the additive is an NO donating compound;wherein the masterbatch is made by a) heating a base polymer to a temperature above a melting point of the base polymer to form a polymer melt; b) introducing into the polymer melt a solution comprising a salt and water; c) mixing the solution with the polymer melt in the extruder to form a blend; d) allowing at least a portion of the water to vaporize and to vent from the extruder; and e) extruding the blend to form the masterbatch; and forming a packaging film from the masterbatch containing blend; and fabricating the film into a package, wherein the film forms an inner layer of the package. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification