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Degradable high barrier active preservative film and preparation method thereof

A cling film, high barrier technology, applied in climate sustainability, chemical instruments and methods, sustainable manufacturing/processing, etc., can solve the problems of high cost of cling film, hinder the popularization and application of polylactic acid, etc., to avoid oxidation and degradation , prolong the shelf life effect, improve the stability effect

Inactive Publication Date: 2018-01-26
SHANGHAI OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of simply using polylactic acid to prepare plastic wrap is too high, hindering the popularization and application of polylactic acid

Method used

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  • Degradable high barrier active preservative film and preparation method thereof
  • Degradable high barrier active preservative film and preparation method thereof
  • Degradable high barrier active preservative film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) prepare outer layer PLA resin particle, base material is PLA and PHA, auxiliary agent is TMP6000, Irganox245 and EBS (ethylene bis stearic acid amide), base material accounts for 97.8% of this layer resin gross mass, auxiliary agent Accounting for 2.2% of the total mass of resin in this layer; pre-dry 750g PLA and 228g PHA at 80°C, the mass ratio of PLA to PHA is 3.29:1, dry the PLA and PHA, 10g TMP6000, 2g Irganox245, 10g After the EBS is stirred and homogenized, it is extruded and granulated by a twin-screw granulator. The mass ratio of TMP6000, Irganox245 and EBS is 5:1:5. Among them, the heating temperature of the first zone is 165°C, the heating temperature of the second zone is 175°C, the heating temperature of the third zone is 185°C, the heating temperature of the fourth zone is 190°C, the heating temperature of the fifth zone is 185°C, and the heating temperature of the sixth zone is 180°C. The heating temperature in the seventh zone is 180°C.

[0045] (2)...

Embodiment 2

[0051] In order to investigate the effect of the die lip temperature of the main machine on the multi-layer co-extrusion casting machine and the speed of the roll (including the casting roll, the back pressure roll and the traction roll) on the adhesion between the layers of the multi-layer food preservation film, in the implementation On the basis of the formula composition and preparation method of Example 1, the parallel experimental group is set as the investigation variable with the die lip temperature and the roll speed. The experimental group settings and experimental results are as shown in Table 2:

[0052] Table 2

[0053] Die lip temperature (℃)

[0054] The results in Table 2 show that when the host of the multi-layer co-extrusion casting machine selects the die lip temperature of 180°C and the roll speed of 1r / min, the peel strength between the layers of the obtained food preservation film is 3.52N / mm, which is higher than other For the experimental grou...

Embodiment 3

[0056] (1) Prepare the outer layer of PLA resin particles, the base material is PLA and PHA, the auxiliary agents are TMP6000, Irganox245 and EBS, the base material accounts for 98.9% of the total mass of the layer of resin, and the auxiliary agent accounts for 1.1% of the total mass of the layer of resin; The amount of PLA is 761g, the amount of PHA is 228g, the amount of TMP6000 is 5g, the amount of Irganox245 is 1g, the amount of EBS is 5g, and the mass ratio of PLA and PHA is 3.34:1; The preparation method of this step resin particle is implemented with example 1.

[0057] (2) Prepare the PVA resin particles in the middle layer, this step is the same as in Example 1.

[0058] (3) Prepare inner PLA resin particles, the base material is PLA and PHA, the auxiliary agents are TMP6000, Irganox245 and EBS, the antibacterial active ingredient is oregano essential oil, the base material accounts for 95.9% of the total mass of the resin, and the auxiliary agent accounts for 1.1% o...

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Abstract

Belonging to the plastic packaging field, the invention in particular relates to a degradable high barrier active preservative film and a preparation method thereof. The degradable high barrier activepreservative film consists of an inner layer PLA resin film, a middle layer PVA resin film and an outer layer PLA resin film from the inside out in order, the inner layer PLA resin film, the middle layer PVA resin film and the outer layer PLA resin film all include a matrix and an assistant, and the inner layer PLA resin film also includes a bacteriostatic active ingredient. The degradable high barrier active preservative film provided by the invention has excellent moisture barrier properties, gas barrier properties, bacteria resistance, oil resistance and degradability, can effectively prevent moisture or oil loss, oxidation, corruption or degradation of food and fresh and raw food, extend the shelf life, and improve the quality guarantee effect.

Description

technical field [0001] The invention relates to the field of plastic packaging, in particular to a degradable high-barrier active fresh-keeping film and a preparation method thereof. Background technique [0002] Plastic wrap is a kind of plastic packaging product, which is mainly used in microwave food heating, refrigerator food preservation, fresh and cooked food packaging and other occasions. It is widely used in family life, supermarket stores, hotels and restaurants and food packaging in industrial production. Preservative film has been favored by people for its convenience, economy and attractive appearance. [0003] However, the air permeability and moisture permeability of the fresh-keeping film itself make it have a short shelf life and poor effect when applied to fresh food, and the lack of bacterial resistance further hinders its popularization and application on fresh food. In addition, the fresh-keeping film cannot be degraded, causing a burden on the ecologica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/36B32B27/30B32B27/08B32B27/18B29D7/00B65D65/40
CPCY02W90/10
Inventor 李立杜云飞王易芬刘源沈春华雷桥杨春香
Owner SHANGHAI OCEAN UNIV
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