US 11,987,436 B2
Package and method for color retention of fresh meat
Henry Walker Stockley, Clover, SC (US); and Wan Mei Leong, Charlotte, NC (US)
Assigned to Cryovac, LLC, Charlotte, NC (US)
Appl. No. 17/917,368
Filed by Cryovac, LLC, Charlotte, NC (US)
PCT Filed Apr. 6, 2021, PCT No. PCT/US2021/025854
§ 371(c)(1), (2) Date Oct. 6, 2022,
PCT Pub. No. WO2021/207113, PCT Pub. Date Oct. 14, 2021.
Claims priority of provisional application 63/006,252, filed on Apr. 7, 2020.
Prior Publication US 2023/0150749 A1, May 18, 2023
Int. Cl. B65D 81/20 (2006.01); B32B 27/08 (2006.01); B32B 27/28 (2006.01); B32B 27/30 (2006.01); B32B 27/32 (2006.01); B65B 25/06 (2006.01); B65B 31/04 (2006.01); B65D 65/40 (2006.01); B65D 77/00 (2006.01); B65D 79/02 (2006.01)
CPC B65D 81/2092 (2013.01) [B32B 27/08 (2013.01); B32B 27/28 (2013.01); B32B 27/306 (2013.01); B32B 27/32 (2013.01); B65B 25/067 (2013.01); B65B 31/048 (2013.01); B65D 65/40 (2013.01); B65D 77/003 (2013.01); B65D 79/02 (2013.01); B32B 2250/246 (2013.01); B32B 2264/1021 (2020.08); B32B 2307/724 (2013.01); B32B 2439/70 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A package comprising:
a. a plurality of food packages containing fresh meat food products;
i. the plurality of food packages being vacuum packaged to form case ready packages comprising:
a support and a permeable film;
the permeable film having an oxygen transmission rate (OTR) of at least 4,000 cc (STP)/m2/day/1 atm at 23° C. and 0% relative humidity (RH) as measured in accordance with ASTM D3985;
b. the plurality of food packages contained within a sealed master pouch being made from a film having an OTR less than 100 cc (STP)/m2/day/1 atm at 23° C. and 0% relative humidity (RH) as measured in accordance with ASTM D3985;
c. the sealed master pouch comprising a modified atmosphere comprising nitrogen, carbon dioxide, at least 0.6% by volume carbon monoxide and less than 0.05% oxygen;
such that a color retention percentage of the fresh meat food product is at least 70% measured in accordance with the following formula:

OG Complex Work Unit Math
Color1 is a Hunter LAB a-value of the fresh meat food product in the case ready package measured on the day the food package is removed from the master pouch;
Colorx is a Hunter LAB a-value of the fresh meat food product in the case ready package measured x days after the food package is removed from the master pouch; and
x is at least 3 days.