Antimicrobial food packaging

A food packaging, anti-microbial technology, used in packaging, wrapping paper, transportation and packaging

Inactive Publication Date: 2009-09-02
库纳设备制造有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, a certain deficiency in the prior art is that metal salts with antimicrobial activity as solids are usually handled as having relatively large particle sizes in the micrometer (μm) range

Method used

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  • Antimicrobial food packaging
  • Antimicrobial food packaging

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0033]First, 100 ml of diethylene glycol (DEG) was heated at reflux and allowed to cool to room temperature. 1g AgNO 3 dissolve in it. The solution was then heated in a water bath. Above 50°C, the initial yellowish solution turned to light gray, which is considered to be indicative of the formation of agglomerated silver particles. The solution is concentrated and mixed into a polymer particle material, which is injected into a twin-screw extruder, and then processed into the middle layer of a multi-layer tubular film by co-extrusion.

example 2

[0035] First, 100 ml of triethylene glycol (TEG) was heated at reflux for one hour. After cooling to 150°C, under vigorous stirring, slowly and concomitantly add 5 ml of 0.1 molar AgNO 3 solution and a 0.2 molar solution of polyvinylpyrrolidone (PVP with a molar mass of 20,000). The suspension formed during extrusion of the tube in such a way that the concentration of Ag is 50 ppm relative to the mass of the polymer of the inner layer in contact with the product is added as an additive. This addition is carried out at a temperature in the range 180-220°C.

example 3

[0037] In 100 ml of triethylene glycol (TEG), 10 g of PVP was dissolved at 150°C. The PVP typically has a molar mass in the range of 6,000-20,000. Subsequently, 1-5 g of AgNO was dissolved in another 100 ml of TEG with stirring and heating and in the presence of the surfactant sodium lauryl sulfate (1-5 g) 3 . The surfactant sufficiently stabilizes some of the silver nuclei formed and inhibits their further growth. The rest of the silver particles grow into coarse particles, which are also stabilized by encapsulation after adding the PVP-TEG / PVP solution after 0.5-24 hours, preferably 1-5 hours.

[0038] The resulting bimodal particle size distribution shows transient effects due to the fraction of smaller particles. In contrast, the coarser fraction resulted in a longer period of bacterial inhibition due to a kind of reservoir effect.

[0039] The suspension thus formed is added to the polymer during extrusion of the tube in such a way that the Ag concentration amounts to...

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Abstract

The invention relates to a single or multi-layered food packaging based on plastic. The layer or at least one of the layers contains at least one antimicrobially active metal. At least one part of the antimicobially active metal has a finely distributed metallic form and the remaining part is in the form of a salt.

Description

technical field [0001] The present invention relates to a single-layer or multilayer food packaging based on plastic material, in particular to a food packaging in which the layer or at least one of the layers comprises a material having antimicrobial activity. Background technique [0002] The shelf life of products such as meat, sausage and cheese is limited by the growth of microorganisms in the packaging, and it is a constant goal to improve the shelf life of these products through appropriate means. Appropriate means include packaging under aseptic conditions and adding preservatives to the product to be packaged. [0003] An additional or further possibility of effectively inhibiting the growth and / or multiplication of microbial bacteria consists in doping or coating the packaging material with substances having antimicrobial activity. In general, in this specification, "antimicrobial" or "having antimicrobial activity" describes activity against microorganisms, espec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A22C13/00B65D81/28
CPCB32B27/18A22C2013/0046A22C13/0013B65D81/28A22C2013/0059C08K3/08Y10T428/31681A22C13/00B32B15/00B65D65/40
Inventor 希夫曼·于尔根施罗泽尔·赫尔穆特
Owner 库纳设备制造有限责任公司
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