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Release of CIO2 gas from produce packaging film

A technology for agricultural products and packaging films, which is applied in the field of compositions for controllable release of ClO2 gas, and can solve problems such as timing that is difficult to control.

Pending Publication Date: 2018-07-31
WISCONSIN ALUMNI RES FOUND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this system the ClO produced 2 The timing of is difficult to control because ClO is produced once the polymer is exposed to light, including incidental exposure to ambient visible light 2

Method used

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  • Release of CIO2 gas from produce packaging film
  • Release of CIO2 gas from produce packaging film
  • Release of CIO2 gas from produce packaging film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0120] A bilayer cast film consisting of a layer of EVOH and a layer of polyethylene with 16% sodium chlorite additive was extruded. Sachets were made using this film (19 cm long, 19 cm wide) with a PE layer as the inner food contact layer. The pouches were exposed to 80% RH at 35°C for about 12 hours. After conditioning, 20 g of baby spinach were filled into a sachet and sealed. Additional testing is done with empty bags. The pouch was exposed to 254nm UV for 3 or 5 seconds (one side only). The concentration of chlorine dioxide produced in the pouch was recorded using a PortaSens II gas leak detector. Concentration measurements were taken approximately 1 min after UV exposure. The results are shown in Table 2. ClO in a sachet with spinach 2 The lower readings are theoretically due to ClO 2 Degradation due to reduction by the contents of the sachet.

[0121] Table 2: Chlorine dioxide concentrations in sealed pouches with and without spinach.

[0122]

Embodiment 2

[0124] To verify its efficacy against pathogenic bacteria, samples of sachets were sent to the Institute for Food Safety and Hygiene (IFSH) for microbiological studies, where they were filled with 30 grams inoculated with L. monocytogenes lettuce, the initial count was 7.6E+06CFU / g. The pouch has the same structure and dimensions as the produce package example 1. The pouches were exposed to 254nm UV radiation for 3s or 5s and analyzed for microbial kill at 1 and 5 days. It should be noted that the control samples did not contain any ClO 2 Additives (LDPE sealant laminated to OPP). Contains ClO 2 The sachets were pre-humidified to 80% RH or left unconditioned. The moisture needed to generate chlorine dioxide in the dry sample comes from the lettuce. Chlorine dioxide was observed to be capable of 4-5 log kills 5 days after inoculation and packaging. The results are summarized in Table 3.

[0125] Table 3: Log counts of L. monocytogenes inoculated lettuce

[0126]

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Abstract

The invention relates to a multilayer produce packaging film. The multilayer produce packaging film includes a first layer and a chlorine dioxide-producing layer. The chlorine dioxide-producing layerincludes a polymer composition and a plurality of chlorite ions. The chlorine dioxide-producing layer is substantially free of an energy-activated catalyst and is substantially free of an acid-releasing compound. However, the film is capable of generating chlorine dioxide when exposed to UV light and moisture.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Provisional Patent Application No. 62 / 206,464, filed August 18, 2015. This application is hereby incorporated by reference without conflicting with the present disclosure. technical field [0003] The present disclosure generally relates to the release of sterilizing gases from packaging films for agricultural products. In particular, the present disclosure relates to packaging for the controlled release of ClO from agricultural products. 2 Gas compositions and methods. Background technique [0004] Chlorine dioxide (ClO 2 ) is a powerful oxidizer and disinfectant. It is currently mainly used in the bleaching process of the pulp industry and as a disinfectant for water treatment. It has proven to be a useful broad-spectrum fungicide in applications as diverse as food processing, fungus and mold fumigation, biofilm treatment, and even kills bedbugs and, where applicable,...

Claims

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Application Information

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IPC IPC(8): B32B27/32
CPCB32B27/32B32B27/06B32B27/00B32B27/30B32B27/306B32B27/08B32B27/20B32B33/00B65D65/40B32B2255/26B32B2307/31B32B2307/7145B32B2439/80B32B2439/00B32B7/12B32B27/18B32B27/28B32B27/304B32B27/322B32B27/34B32B27/36B32B2264/10B32B2307/40B32B2307/50B32B2307/71B32B2307/7242B32B2307/7244B32B2307/7246B32B2307/732B32B2307/748B32B2439/06B32B2439/46B32B2439/70B32B15/08B65D1/00B32B2255/10B32B2255/20B32B2255/205B32B15/20B65D81/24B32B1/00A61L2/20A61L2202/11B32B15/082B32B15/085A23B7/144B32B2315/00B32B2323/10B32B2405/00C08L23/12C08L2203/16B01J19/123B01J2219/0879B01J2219/1203C01B11/024C08K3/24
Inventor N·阿尔伯特R·简恩K·纳尔逊D·布希D·林恩
Owner WISCONSIN ALUMNI RES FOUND
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