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Active packaging film and preparation method thereof

A packaging film and active technology, which is applied in the field of active packaging film and its preparation, can solve the problems of difficult application and achieve the effect of maintaining effect, easy production and extending shelf life

Inactive Publication Date: 2018-02-27
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, studies have found that the antibacterial effect of the coating film is not as strong as that of the film produced by co-extrusion, and the production of the coating film requires a secondary process, which is not easy for the application

Method used

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  • Active packaging film and preparation method thereof
  • Active packaging film and preparation method thereof
  • Active packaging film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1, the preparation method and formula of active packaging film

[0040] The formula of this embodiment is: low density polyethylene 1000g, ethylene-vinyl acetate copolymer 100g, maleic anhydride 30g, cinnamon essential oil 10g.

[0041] Preparation method: comprising the following steps:

[0042] Mix ethylene-vinyl acetate copolymer (EVA) and maleic acid (OREVAC) evenly, add cinnamon essential oil and continue to mix evenly, continue to add LDPE resin to mix, the mixed masterbatch is blown with a film blowing machine, the temperature of the film blowing machine The setting is: 200°C in the membrane body area; 175°C in the split flow area, and the thickness of the produced film is 66.2 μm. It generally takes 20-30 minutes from feeding to film discharge.

Embodiment 2

[0043] Embodiment 2, the preparation method and formula of active packaging film

[0044] The formula of this embodiment is: 1000 g of low density polyethylene, 80 g of ethylene-vinyl acetate copolymer, 40 g of maleic anhydride, and 15 g of cinnamon essential oil.

[0045] The preparation method of the active packaging film of this embodiment is the same as that of Embodiment 1, and will not be repeated here.

[0046]The present invention selects extrusion film forming as a research direction to study novel active packaging. Low-density polyethylene (LDPE) and cinnamon essential oil were selected for extrusion blow molding, and ethylene-vinyl acetate (EVA) was selected as a solubilizer, and maleic anhydride (OREVAC) was used as a linker to produce cinnamon essential oil-LDPE active film.

Embodiment 3

[0047] Embodiment 3, the physical property of cinnamon essential oil active film and the verification test of fresh-keeping effect

[0048] 1. Composite verification and physical properties of cinnamon essential oil-LDPE film

[0049] Since the present invention is the first time that cinnamon essential oil is compounded into LDPE, this study first verified the essential oil and LDPE by using characterization techniques such as scanning electron microscopy (SEM), thermogravimetry (TGA) and differential calorimetry (DSC). The composability of ethylene and its relatively stable thermodynamic properties after compounding. The test results are shown in the figure (Film 1, Film 2 represent pure film and active film respectively):

[0050] figure 1 The DSC curves show that, compared with the control film, the parameter values ​​of the active film such as melting point have not changed, and the active film has a wider endothermic peak, which is due to the thermal migration of the e...

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Abstract

The invention provides an active packaging film. The active packaging film comprises the following raw materials: low-density polyethylene, an ethylene-vinyl acetate copolymer, maleic anhydride and cinnamon essential oil, wherein the adding amount of the ethylene-vinyl acetate copolymer is 8 to 10 percent of the low-density polyethylene, the adding amount of the maleic anhydride is 2 to 5 percentof the low-density polyethylene and the adding amount of the cinnamon essential oil is 0.5 to 1.5 percent of the low-density polyethylene. In addition, the invention also provides a preparation methodof the active packaging film.

Description

technical field [0001] The invention relates to a packaging film, in particular to an active packaging film and a preparation method thereof. Background technique [0002] As we all know, food spoilage is mainly caused by microbial pollution and oxidation. Most food preservation methods, such as fermentation, drying, thermal processing, freezing, refrigeration and controlled atmosphere preservation, are effective, but they also have their limitations. Especially used in fresh meat (requires little change in the structure of the meat during preservation). Drying and thermal processing can easily cause food to lose its original flavor (especially for aquatic products) and destroy its internal structure. Modified atmosphere preservation needs to be combined with other technologies, the preservation period of adding preservatives is short, and the food is easy to remain inside, etc. Therefore, it is necessary to seek new fresh-keeping methods to preserve food (especially meat ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08K5/07C08K5/1539C08J5/18
CPCC08J5/18C08J2323/06C08J2423/08C08K5/0058C08K5/07C08K5/1539
Inventor 李振兴徐凤娟董铮罗晨董浩林洪
Owner OCEAN UNIV OF CHINA
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