A kind of leek fresh-keeping packaging film
A technology for fresh-keeping packaging and leeks, applied in packaging, wrapping paper, biological packaging, etc., can solve problems such as water accumulation, removal of water from leeks, condensation on the surface of the film, etc.
Active Publication Date: 2020-02-11
BEIJING INSTITUTE OF GRAPHIC COMMUNICATION
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- Description
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Problems solved by technology
However, the moisture permeability of this film is very low, generally less than 20g / (m 2 day), cannot quickly remove the moisture produced by leek respiration from the fresh-keeping bag, which will easily cause moisture accumulation, resulting in RH exceeding 100%, and condensation on the surface of the film. This high-humidity environment greatly increases the growth rate of bacteria , leeks are easy to rot in this environment
Although PE cling film can effectively prevent the water loss of leeks and maintain fresh weight and good properties, it also brings about the problem of rot. Therefore, we chose other cling films with stronger functions to complete the experiment.
Method used
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Experimental program
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Effect test
Embodiment 1
[0043] The OTR of A membrane material is 1300ml / M2.day.atm, and the WVTR is 10g / M2.day.
[0044] Preparation of D film: WVTR50g / M2.day, OTR 10 4 ml / M2.day.atm.
[0045] AA+D film patch series (two large pieces of A film are pasted together to form a bag, and then a hole is cut on one bag, and the D film is pasted on it. The total area of the two pieces of A is 500cm 2 , the area of patch D is 16cm 2 ;Leek weight about 150g a sample. Appearance structure such as figure 1 shown.
[0046] AA film + 4×4cm D film patch is the most suitable modified atmosphere storage bag for leek preservation, in which AA film accounts for 96.9% of the total area, and 4×4cm D film patch accounts for 3.1% of the total area.
[0047] The fresh-keeping package can make the shelf life of the leeks reach 4 days at room temperature, and the leeks are still fresh after 4 days of fresh-keeping, the leaves are not obviously yellowed, the kneading water is sufficient, the stem part is hard enough, a...
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Abstract
The invention relates to a fragrant-flowered garlic fresh-keeping packaging film, which belongs to the technical field of films. A form of an AA film and a D film paster is adopted, so that two A films form a fresh-keeping bag; a square hole is formed in one A film, then the D film sticks on the square hole, the position of the square hole is located on a position of a root part of fragrant-flowered garlic, and the D film is parallel to the fragrant-flowered garlic; the D film paster accounts for 3.0 to 3.5 percent of the total area of the fresh-keeping packaging film; the A film is a fruit fresh-keeping green packaging material film with an ethylene adsorption function, the WVTR (Water Vapor Transmission Rate) being 10g / m<2>.day and the oxygen permeability being 1300 to 4600ml / day.m<2>; and the D film is a breathable fresh-keeping film with the oxygen permeability being 1x104 to 1x105ml / m<2>.day.atm, and the water vapor transmission rate being 100 to 300 g / m<2>.day. The fragrant-flowered garlic can be kept fresh for 4 days.
Description
technical field [0001] The invention relates to a leek fresh-keeping packaging film, which belongs to the field of film technology. [0002] technical background [0003] At present, low-temperature storage is a relatively easy fresh-keeping solution. When the entire logistics path flows according to origin-transportation-supermarket-user, low-temperature preservation can be achieved at the supermarket level; but if it is according to origin-transportation-Xinfa- Retailer wholesale - retail store - user this one logistics path, low temperature to the retailer level is difficult to achieve. Although the mechanical refrigeration method is a low-temperature fresh-keeping method that is currently being actively developed, it requires a large initial cost investment. At present, this method has not yet matured on the market and has not been widely used. [0004] The effect of temperature on the preservation of leeks can be summed up in one sentence, that is, high temperature and ...
Claims
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IPC IPC(8): B65D65/22B65D65/46B65D85/50C08J5/18C08L23/12C08L23/06C08K7/26C08L97/02C08L1/02C08L29/04C08L23/08
CPCB65D65/22B65D65/46B65D85/50C08J5/18C08J2301/02C08J2323/06C08J2323/12C08J2401/02C08J2423/08C08J2429/04C08J2497/02
Inventor 廖瑞娟李东立许文才曹国荣石佳子付亚波王纪刚
Owner BEIJING INSTITUTE OF GRAPHIC COMMUNICATION