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Function-integrated fresh-keeping packaging bag and application thereof in preservation of Chinese cabbage

A packaging bag and functional technology, which is applied in the field of fresh-keeping packaging bags with integrated functions for keeping fresh rapeseed, can solve the problems of increasing the growth rate of bacteria, removing water, and water loss, so as to ensure the appearance quality, reduce oxygen supply, and curb breathing jump. change effect

Inactive Publication Date: 2017-12-19
BEIJING INSTITUTE OF GRAPHIC COMMUNICATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve the moisture permeability of the polyethylene film, holes (diameter 0.82mm) are even opened in the polyethylene fresh-keeping bag to prevent condensation in the bag, but these micropores will also allow oxygen to enter, increase the breathing intensity of small rapeseed, and increase the amount of water produced , can not fundamentally solve the condensation problem of fresh-keeping bags
[0004] To sum up, polyethylene (PE) fresh-keeping bags are often used for fresh-keeping small rapeseed. PE fresh-keeping bags have high oxygen permeability. The oxygen permeability of PE films with a thickness of about 10 microns can reach tens of thousands of ml / (m 2 .atm.day), which can fully meet the aerobic respiration needs of small rapeseed in fresh-keeping bags, but the moisture permeability of this film is very low, generally less than 20g / (m 2 .day), the moisture produced by the respiration of rapeseed cannot be quickly removed from the fresh-keeping bag, resulting in moisture accumulation, RH exceeding 100%, and condensation on the surface of the film. This high-humidity environment greatly increases the growth rate of bacteria, causing The small rapeseed is rotten at the wound. Although the PE plastic wrap can effectively prevent the water loss of the small rapeseed, it also brings the problem of rot

Method used

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  • Function-integrated fresh-keeping packaging bag and application thereof in preservation of Chinese cabbage
  • Function-integrated fresh-keeping packaging bag and application thereof in preservation of Chinese cabbage
  • Function-integrated fresh-keeping packaging bag and application thereof in preservation of Chinese cabbage

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Using the E and A functional films developed by us to keep 0.5kg of rapeseed fresh, it is necessary to pack fresh-keeping with 34mgH 2 The rate of O / hr discharges the moisture generated by the respiration of fruits and vegetables. We assume that the moisture is completely provided by the A functional film (the reason for this assumption will be provided later), and the area of ​​the functional film A (S A )for:

[0045] S A =34mgH 2 O / hr×24hr / (80g / m 2 .day×(0.95-0.6))=0.026m 2 (6)

[0046] To maintain aerobic respiration of 0.5kg rapeseed, 21ml CO 2 The rate of / hr continues to provide oxygen from the outside world. We assume that the moisture is completely provided by the E function film (the reason for this assumption will be provided later), and the area of ​​the E function film (S B )for:

[0047] S B = 21ml O 2 / hr×24hr / (1.7×10 5 ml / m 2 .day.atm×

[0048] (0.2-0.15)) = 0.006m 2 (7)

[0049] In the headspace of the crisper package, we set to mainta...

Embodiment 2

[0059]On the basis of Example 1, the raw film of one of the fresh-keeping packages is designed to consist of: 50% area A film+50% area E film, that is, the same area (0.03m 2 ) two films (A and E) are made into a fresh-keeping bag 1 by three-side sealing, marked as A50E50; the metabolism of rapeseed has a jump-change property, and when a jump occurs, its breathing intensity will be more than twice the normal breathing intensity;

[0060] Also consider using 0.006m 2 The function of E film +0.054m 2 Function A film forms another dual-function integrated fresh-keeping package, marked as A90E10;

[0061] Choose A50E50 and A90E10 two dual-function integrated fresh-keeping packages (bags) to keep 0.5kg of rapeseed fresh, and test the fresh-keeping effect on rapeseed.

[0062] (1) Changes of headspace gas in dual-function integrated fresh-keeping packaging

[0063] Purchase 50kg of rapeseed from Beijing Xinfadi Vegetable Wholesale Market, remove the rapeseed with pests, discolora...

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Abstract

The invention discloses a function-integrated fresh-keeping packaging bag and an application thereof in preservation of Chinese cabbage, and belongs to the technical field of function-integrated fresh-keeping packaging bags. According to the packaging bag, at least two kind of thin films are spliced, wherein film A is a thin film with a high-moisture-permeable function and film E is a thin film with a high-oxygen-permeability and a high-carbon-dioxide-permeability function, the area ratio of the film A to the film E is (50-96.3 ) to (3.7-50), wherein the area ratio is calculated according to the area of the film A plus the area of the film E being 100%. The packaging bag solves the problem of fogging on the inner side of a fresh-keeping bag, and the packaging bag is particularly suitable for a fresh-keeping packaging design of climacteric fruits and climacteric vegetables at a normal temperature.

Description

technical field [0001] The invention belongs to the technical field of function-integrated fresh-keeping packaging bags, and in particular relates to a function-integrated fresh-keeping packaging bag suitable for keeping small rapeseed fresh. Background technique [0002] Chinese Cabbage (Chinese Cabbage) is a variety of Brassica Brassica Brassica subspecies, also known as green cabbage, Chinese cabbage, etc. , strong adaptability, and high nutritional value have become one of the most important vegetables on the table. Small rapeseed has the characteristics of large leaf surface area, high water content, and crisp and tender tissue. After picking, it is prone to problems such as chlorosis, dehydration, wilting, and mildew. The shelf life at room temperature is short, and it is easy to lose its edible value. Rapeseed is more difficult to keep fresh. How to reduce the respiration intensity of the rapeseed, deliver an appropriate amount of oxygen for the rapeseed to breathe,...

Claims

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Application Information

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IPC IPC(8): B65D30/02B65D33/00B65D85/34
CPCB65D31/00B65D33/00B65D85/34
Inventor 廖瑞娟李东立许文才石佳子付亚波王纪刚王雅珺何晓辉
Owner BEIJING INSTITUTE OF GRAPHIC COMMUNICATION