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Temperature-sensitive controlled-release antimicrobial preservative packaging film and preparation method thereof

A fresh-keeping packaging and moisture-sensitive technology, which is applied in the field of antibacterial fresh-keeping packaging film and its preparation, can solve the problems of oxidative decomposition, vegetable skin damage, failure, etc., achieve strong antibacterial effect, controlled release of antibacterial effect, and avoid adverse effects Effect

Inactive Publication Date: 2015-09-30
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, more and more scientific researchers have begun to study the use of plant antibacterial ingredients to keep fruits and vegetables fresh. Most of the research results have formulated natural plant antibacterial ingredients into emulsions and sprayed them directly on the surfaces of fruits and vegetables to achieve Although the purpose of antibacterial and fresh-keeping has achieved some results, there are still some problems, such as natural plant antibacterial components are easy to volatilize or oxidatively decompose and become invalid, and the effective period of antibacterial is uncontrollable, and plant antibacterial components are directly sprayed on the surface of fruits and vegetables. Skin damage of fruits and vegetables

Method used

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  • Temperature-sensitive controlled-release antimicrobial preservative packaging film and preparation method thereof
  • Temperature-sensitive controlled-release antimicrobial preservative packaging film and preparation method thereof
  • Temperature-sensitive controlled-release antimicrobial preservative packaging film and preparation method thereof

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preparation example Construction

[0020] The preparation method of the antibacterial fresh-keeping packaging film is as follows: first mix distilled water, PVA, cornstarch, oregano essential oil, cinnamon essential oil, basil essential oil, rosemary essential oil, and emulsifier according to a certain ratio, heat and stir evenly, and remove air bubbles , to prepare an antibacterial coating solution, and then use a coating machine to apply the antibacterial coating solution to the corona-treated polyethylene film.

[0021] The preparation method of described essential oil comprises the following steps:

[0022] Step 1: Crush the raw material to 20-100 meshes, and then extract the essential oil by steam distillation. The steam distillation temperature is 90-150°C, and the steam distillation time is 3-8 hours. After coming out, the oil-water mixture is separated, and the upper layer of oily liquid is taken.

[0023] Step 2: Add 1-3 g of anhydrous sodium sulfate to the oily liquid obtained in Step 1, dry it, and ...

Embodiment 1

[0032] 1. Moisture-sensitive controllable release antibacterial fresh-keeping packaging film is made of corona-treated LDPE film and coated on LDPE film with PVA, corn starch, oregano essential oil, cinnamon essential oil, basil essential oil, rosemary essential oil, emulsifier , antibacterial coating made of distilled water. The preparation method of the moisture-sensitive controllable-release antibacterial and fresh-keeping packaging film is as follows: first mix distilled water, PVA, cornstarch, oregano essential oil, cinnamon essential oil, basil essential oil, rosemary essential oil, and emulsifier according to a certain ratio, and heat Stir evenly and remove air bubbles to prepare an antibacterial coating solution, and then use a coating machine to coat the antibacterial coating solution on the corona-treated LDPE film.

[0033] 2. The preparation of natural plant essential oil comprises the following steps (taking Oregano as an example, others are the same):

[0034] S...

Embodiment 2

[0045] 1. The preparation method of natural plant essential oils such as oregano essential oil, cinnamon essential oil, basil essential oil, rosemary essential oil is with embodiment 1.

[0046] 2. PVA and natural plant essential oil are prepared into antibacterial coating solution, the preparation method of antibacterial coating solution is the same as embodiment 1, and the massfraction of each component in the antibacterial coating solution is as follows:

[0047]

[0048]

[0049] 4. Antibacterial coating liquid is coated on the LDPE film that corona treatment is crossed, and the thickness of controlling each layer of antibacterial coating is 15 μ m, is coated 2 times, and all the other coating process parameters are with embodiment 1.

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Abstract

The invention discloses a temperature-sensitive controlled-release antimicrobial preservative packaging film and a preparation method thereof, relating to the field of agricultural product preservation. The antimicrobial preservative packaging film is characterized by comprising a polyethylene film subjected to corona treatment, and an antimicrobial coating, which is coated on the polyethylene film and prepared from PVA (polyvinyl alcohol), corn starch, origanum essential oil, cinnamon essential oil, basil essential oil, rosemary essential oil, an emulsifier and distilled water. The preparation method comprises the following steps: proportionally mixing the distilled water, PVA, corn starch, origanum essential oil, cinnamon essential oil, basil essential oil, rosemary essential oil and emulsifier, heating and stirring uniformly, removing bubbles to obtain an antimicrobial coating solution, and coating the antimicrobial coating solution on the polyethylene film subjected to corona treatment by using a coating machine by 1-3 layers. The temperature-sensitive controlled-release antimicrobial preservative packaging film can effectively inhibit microbes capable of rotting fruits and vegetables from growth and reproduction, and can prolong the shelf life of the fruits and vegetables by 2-6 times.

Description

technical field [0001] The invention relates to an antibacterial fresh-keeping packaging film and a preparation method thereof, in particular to a moisture-sensitive controllable-release antibacterial fresh-keeping packaging film and a preparation method thereof, which are suitable for fresh-keeping packaging of agricultural products such as fruits and vegetables. Background technique [0002] Due to factors such as improper packaging and handling of agricultural products, serious shortage of refrigeration facilities, and low marketing capabilities, the post-harvest loss of agricultural products in my country ranks first in the world. About 80 million tons of fruits (accounting for 25% to 30% of output) and 100 million tons of vegetables (accounting for 15% to 20% of output) rot every year in my country, and the direct economic loss of fruit and vegetable rot in China is as high as 100 billion yuan. Developed countries attach great importance to the fresh-keeping and process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C08L23/06C09D129/04C09D103/02C09D7/12C09D5/14B65D65/40C11B9/02
CPCY02A40/90Y02W90/10
Inventor 王建清刘光发张洪军
Owner TIANJIN UNIV OF SCI & TECH
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