Degradable food preservative film and a preparing method thereof

A food preservation and polymer resin technology, applied in the field of food packaging materials, can solve the problems of contamination of food and the environment, non-degradation, leakage of plasticizers, etc., and achieve the effects of slowing down food deterioration, long preservation period, and inhibiting growth.

Active Publication Date: 2017-12-15
蚌埠天成包装科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used plasticizers are mostly non-degradable materials. The degradable food preservation film added with plasticizers only becomes degradable in geometric shape, but the small molecules of plasticizers in the microscopic components cannot be degraded, and cannot be fundamentally degraded. solve the problem of environmental pollution
And the added plasticizer will leak, pollute food and environment

Method used

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  • Degradable food preservative film and a preparing method thereof
  • Degradable food preservative film and a preparing method thereof
  • Degradable food preservative film and a preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1 and embodiment 2 are preferred technical solutions of the present invention, and comparative examples 1 to 3 are comparative experiments.

[0036] Example 1

[0037] In this example, glyceryl monocaprylate (GMC) was selected as plasticizer, PLA and PHB were used as base film materials, and cinnamaldehyde was added as active bacteriostatic agent. Prepare 1 kg of degradable food preservation film, raw materials and dosage: 708.75g PLA, 236.25g PHB, 5g GMC and 50g cinnamaldehyde. That is, the mass ratio of GMC, polymer resin base film material (PLA and PHB) and active antibacterial agent is 0.5:94.5:5, and the mass ratio of PLA to PHB is 3:1. The cinnamaldehyde added in this embodiment is It exists in the form of plant essential oil, and the content of cinnamaldehyde in the plant essential oil is not less than 95%.

[0038] Preliminarily vacuum-dry PLA and PHB at 0.1MPa and 55°C for 2 hours, then add glyceryl monocaprylate and stir evenly, and then prepare m...

Embodiment 2

[0041]In this embodiment, glyceryl laurate (GML) is selected as plasticizer, PLA and PHB are degradable polymer resin base film materials, and cinnamaldehyde is added as active bacteriostatic agent. The degradable food preservation film of 1 kilogram quality is prepared, and raw material and consumption are: 50g cinnamaldehyde, 5g GML, 708.75g PLA and 236.25g PHB, namely GML, polymer resin base film material (PLA and PHB) and active antibacterial agent The mass ratio of PLA to PHB is 0.5:94.5:5, and the mass ratio of PLA to PHB is 3:1. The cinnamaldehyde added in this embodiment exists in the form of plant essential oil, and the content of cinnamaldehyde in the plant essential oil is not less than 95%.

[0042] Preliminarily vacuum-dry PLA and PHB for 2 hours at a vacuum degree of 0.1Mpa and 55°C; then add GML and stir evenly, and then prepare modified degradable polymer resin particles through a twin-screw extruder. The screw rotation speed of the twin-screw extruder is 30r / ...

Embodiment 3

[0054] The degradable food preservative film A, degradable food preservative film B prepared by Examples 1, 2 and Comparative Examples 1 to 3 and the preservative film C, D and E of the control group are tested for physical and mechanical properties, including: tensile strength , elongation at break, water vapor transmission rate, oxygen transmission rate, haze and light transmittance. The testing method is as follows: GB / T 1040.3-2006 is used for mechanical properties, GB / T 2410-2008 is used for haze and light transmittance, GB / T 26253-2010 is used for water vapor transmission rate, and GB / T 1038 is used for oxygen transmission rate -2000. The experimental results are as follows:

[0055] Table 1. Thin film physical and mechanical properties testing

[0056]

[0057]

[0058] It can be seen from the data that, compared with degradable food preservation film D, the tensile strength of degradable food preservation film A and B has been greatly improved. This is because...

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Abstract

The invention belongs to the field of food package materials, and provides degradable food preservative film. The preservative film includes degradable polymer resin and a plasticizer. The plasticizer at least includes one of glycerol monocaprylate and laurin. The degradable polymer resin base film at least includes one of polylactic acid and poly(3-hydroxybutyrate-4-hydroxybutyrate). The preservative film also includes an active bacteriostatic agent. Compared with degradable food preservative film in the prior art, the provided degradable food preservative film has lower oxygen permeability and oxidation resistance, can effectively retard chemical changes of foods, and can inhibit growth of aerobic bacteria on surfaces of foods.

Description

technical field [0001] The invention relates to the field of food packaging materials, in particular to a degradable food preservation film and a preparation method thereof. Background technique [0002] With the rise of the petroleum industry, plastic products produced by petrochemicals are widely used in all aspects of life. PP, PE and other materials are commonly used packaging in the food industry, with excellent performance in terms of transparency, gloss and mechanical strength. Although plastic products have brought great convenience to people's daily life, the problem of white pollution caused by plastic products is also becoming more and more serious. [0003] At the same time, food preservation and preservation has always been an eternal topic. The current international trend is to reduce the use of food additives and preserve freshness through new ways, such as adding antibacterial and antioxidant additives to food packaging. The active substances in this food p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K5/103C08K5/07B29C47/92A23B4/00B29C48/92
Inventor 王易芬马昳超李立邱伟强
Owner 蚌埠天成包装科技股份有限公司
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