Process and coating composition for extending the shelf life of post harvest produce
The shelf life of fresh harvest produce is extended by coating the exterior surface of freshly harvested produce with a coating composition comprising an aqueous emulsion of polyvinylidene chloride copolymers containing from about 0.25 to 25% by weight of copolymer solids to water and between 0.001 and 20% plasticizer preferably a polyethylene oxide based additive such as Triton-X to weight of copolymer solids in the emulsion. The coating may also contain biocides as well to control bacteria and fungal growth on the post harvest produce during storage, shipping, distribution, and sale of the product. The coating composition is effective in extending the shelf life of produce.
1. A process for preserving post harvest produce comprising the step of coating the post harvest produce with a coating composition comprising an aqueous emulsion of less than about 50% by weight of a polyvinylidene chloride copolymer, and from about 0.0005 to 10% by weight of a non-ionic surfactant, wherein said copolymer is formed exclusively of co-monomers selected from the group consisting of vinyl chloride, vinyl acetate, methyl methacrylate, propylene, ethylene, acrylates, styrenes, and combinations thereof, and wherein the post harvest produce are fruits and vegetables.
2. The process as set forth in claim 1 , wherein the coating composition includes from about 0.05 to 0.1% by weight of an antimicrobial.
3. The process as set forth in claim 1 , wherein the coating composition includes from about 50 to 1000 parts per billion of a fungicide.
4. The process as set forth in claim 1 , wherein the coating composition includes about 0.0005 to 0.1% polydimethylsiloxane.
5. The process as set forth in claim 1 , wherein said non- ionic surfactant is selected from the group consisting of octylphenol ethoxylates, nonylphenol ethoxylates and polysorbates.
6. The process of claim 1 , wherein the fruits and vegetables are selected from the group consisting of bananas, pineapples, avocados, cantaloupes, honeydew melons, mangoes, papayas, platains, star fruit, lemons, limes, oranges, tangerines, kumquats, tangelos, grapefruits, lychee, guava, breadfruit, kiwi, rambutan, and a combinations thereof.