# US 8,568,809 B2 · Oil resistant packaging

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- Number: US 8,568,809 B2
- Document ID: US8568809B2
- Status: Granted
- Kind: B2
- Application number: 12/777,196
- Filed: 2010-05-10
- Published: 2010-11-11
- Granted: 2013-10-29
- Earliest claimed: 2006-02-17
- Assignees: Diamond Foods, Inc.
- Applicants: Marcia A. Popa; Randal J. Monforton; David W. Plank; Jonathan W. DeVries
- Inventors: Marcia A. Popa; Randal J. Monforton; David W. Plank; Jonathan W. DeVries
- Web page: https://patentgrep.com/patent/US8568809B2

## CPC

- B65D 65/42: Applications of coated or impregnated materials
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 9/02: comprising animal or vegetable substances {, e.g. cork, bamboo, starch}
- B32B 27/10: of paper or cardboard
- B32B 27/12: next to a fibrous or filamentary layer
- B32B 27/18: characterised by the use of special additives
- B32B 27/306: {comprising vinyl acetate or vinyl alcohol (co)polymers}
- B32B 27/308: {comprising acrylic (co)polymers}
- B32B 2262/062: Cellulose fibres, e.g. cotton
- B32B 2307/306: Resistant to heat
- B32B 2307/73: Hydrophobic
- B32B 2307/75: Printability
- B32B 2439/40: Closed containers
- B32B 2439/70: Food packaging
- Y10T 428/1303: Paper containing [e.g., paperboard, cardboard, fiberboard, etc.]
- Y10T 428/1307: Bag or tubular film [e.g., pouch, flexible food casing, envelope, etc.]
- B65D: CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Oil resistant package material and packages prepared therefrom have cyclodextrin incorporated in or adjacent to a film layer of the package to reduce the permeation of oil through the package material, and particularly out of the package. The film layer comprises a polymer that coordinates or bonds with a cyclodextrin compound in an amount sufficient to reduce the permeation of oil through the film layer as compared to a like film layer that does not contain cyclodextrin.

## Claims

### Claim 1

A product package comprising
a) a closed package comprising a layer that is a film layer comprising a polymer capable of coordinating or bonding with a cyclodextrin compound;
b) an oil or fat containing food product comprising a migratable cyclodextrin compound disposed within the package;
wherein upon migration of the oil or fat in the product to the package, cyclodextrin is transported to the film layer in an amount sufficient to coordinate or bond with the film layer to reduce the permeation of oil through the package as compared to a like product package that does not have a cyclodextrin compound disposed within the package.

### Claim 2 (depends on 1)

The product package of claim 1, wherein the product package is a packaged microwave popcorn product.

### Claim 3 (depends on 1)

The product package of claim 1 wherein the migratable cyclodextrin compound is pre-hydrated prior to assembly of the oil resistant packaging laminate.

### Claim 4 (depends on 3)

The product package of claim 3 wherein the pre-hydrated migratable cyclodextrin compound comprises cyclodextrin and water at a weight ratio from 1:10 to 10:1.

### Claim 5 (depends on 3)

The product package of claim 3 wherein the pre-hydrated migratable cyclodextrin compound comprises cyclodextrin and water at a weight ratio from 5:1 to 1:5.

### Claim 6 (depends on 3)

The product package of claim 3 wherein the pre-hydrated migratable cyclodextrin compound comprises cyclodextrin and water at a weight ratio from 2:1 to 1:2.