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Sustained-release antioxidant packaging film for food and preparation method thereof

A technology of anti-oxidation and packaging film, applied in the field of food packaging materials

Active Publication Date: 2013-12-11
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding antioxidants directly to food can prolong the shelf life of packaged products, but consumers prefer green foods without additives; active packaging such as vacuum packaging or modified atmosphere packaging can limit the oxygen content inside the packaging, but because some oxygen will dissolve in the Therefore, the oxygen inside the packaging cannot be completely removed; the purpose of anti-oxidation packaging can be achieved by adding or coating antioxidants in packaging materials, but currently most of the antioxidants used in these materials are synthetic antioxidants, and their safety issues There is a lot of controversy, and the retention rate of antioxidants after film formation is often not high, the effective utilization rate is low, it is difficult to form long-term antioxidant protection, and the product cost is high

Method used

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  • Sustained-release antioxidant packaging film for food and preparation method thereof
  • Sustained-release antioxidant packaging film for food and preparation method thereof
  • Sustained-release antioxidant packaging film for food and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation steps of the packaging film of this example (without the addition of slow-release agent diatomaceous earth) are as follows:

[0033] (1) Weigh quercetin (product of Sinopharm Group Chemical Reagent Co., Ltd.) 1.5g, HDPE masterbatch (DGDA6098, product of Qilu Petrochemical) 100g, EVA masterbatch (14-2, product of Beijing Organic Chemical Factory) 100g, first Mix the two masterbatches evenly, set the temperature of the front roller of the plasticizing machine to 140°C, and the temperature of the rear roller to 130°C, place the mixed masterbatch in the double-roller plasticizing machine, and smelt for 5 minutes until the plasticization is uniform and good;

[0034] (2) Add quercetin evenly to the well-plasticized masterbatch in step (1), and smelt for 6 minutes until the quercetin is evenly mixed in the masterbatch;

[0035] (3) After the blended flakes of HDPE, EVA and quercetin are rolled well, unroll the flakes, spread them on a flat plate in a sin...

Embodiment 2

[0039] The preparation steps of the packaging film of this example (without the addition of slow-release agent diatomaceous earth) are as follows:

[0040] (1) Weigh 1.5g of quercetin (same as above), 130g of HDPE masterbatch (same as above), and 70g of EVA masterbatch (same as above). The temperature of the rear roller is 132°C, and the mixed masterbatch is placed in a double-roller plastic refining machine, and the plastic is refined for 6 minutes until the plasticization is uniform and good;

[0041] (2) Add quercetin evenly to the well-plasticized masterbatch in step (1), and smelt for 7 minutes until the quercetin is evenly mixed in the masterbatch;

[0042] (3) After the blended flakes of HDPE, EVA and quercetin are rolled well, unroll the flakes, spread them on a flat plate in a single layer, and cut them into 2cm×2cm squares after cooling for 15 minutes;

[0043] (4) Preheat the metal platen, weigh 6.2g of the thin slice obtained in step (3), place it between...

Embodiment 3

[0046] Example packaging film (without adding slow-release agent diatomaceous earth) preparation steps are as follows:

[0047] (1) Weigh 1.5g of quercetin (same as above), 160g of HDPE masterbatch (same as above), and 40g of EVA masterbatch (same as above). The temperature of the rear roller is 135°C, and the mixed masterbatch is placed in a double-roller plastic refining machine, and the plastic is refined for 8 minutes until the plasticization is uniform and good;

[0048] (2) Add quercetin evenly to the well-plasticized masterbatch in step (1), and knead for 8 minutes until the quercetin is evenly mixed in the masterbatch;

[0049] (3) After the blended flakes of HDPE, EVA and quercetin are rolled well, unroll the flakes, spread them on a flat plate in a single layer, and cut them into 2cm×2cm squares after cooling for 20 minutes;

[0050] (4) Preheat the metal platen, weigh 6.2g of the thin slice obtained in step (3), place it between two metal platens, and pla...

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Abstract

The invention relates to a sustained-release antioxidant packaging film for food and a preparation method thereof. A film substrate of the packaging film is formed by blending 50-80 parts by weight of HDPE (High-Density Polyethylene) and 20-50 parts by weight of EVA (Ethylene-Vinyl Acetate Copolymer) while adding 5-12.5 parts by weight of diatomite and 0.75-1.25 parts by weight of quercetin. The preparation method comprises the steps: (1) uniformly mixing an HDPE master batch and an EVA master batch, and plasticating; (2) sprinkling diatomite on a roller-wrapped blending thin sheet, plasticating for 6-8 minutes, sprinkling quercetin, and plasticating for 6-8 minutes; (3) carrying out roller release, tiling on a flat plate in single layer, cooling, and then cutting; (4) carrying out hot pressing; (5) carrying out pressure forming, thereby obtaining the packaging film. The packaging film disclosed by the invention has sustained release antioxidant performance, so that the effective utilization ratio of an antioxidant can be increased obviously; meanwhile, the packaging film has good mechanical properties and dampness and oxygen barrier performance; the condition that the packaging film prepared by the method disclosed by the invention has a higher antioxidant retention ratio can be guaranteed.

Description

Technical field [0001] The present invention involves food antioxidant packaging materials, especially a food antioxidant packaging film and its preparation methods with slow -release performance, which belongs to the field of food packaging materials. Background technique [0002] The people use food as the sky, and food provides all kinds of nutrition and energy necessary for human beings. It occupies a very important position in people's lives. On the basis of solving food and clothing, people's requirements for food quality, such as nutrition, taste, and color.It also puts forward higher requirements.Fat is the main nutritional element of storage and supply energy, but these lipid substances are very sensitive to the external environment. During the storage and transportation process, it is vulnerable to microorganisms, air, and packaging.Oxidation will not only deteriorate the fat in food, destroy vitamins, but also cause color and fade food, which seriously affects the colo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08K3/34C08K5/1545B29D7/01
Inventor 卢立新韩甜甜蔡莹
Owner JIANGNAN UNIV
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