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A waterproof and breathable paper and a waterproof and breathable fresh-keeping film prepared by using the paper

A waterproof, breathable, and fresh-keeping film technology, which can be used in containers to prevent rot, wrapping paper, and packaged fruits/vegetables. performance effect

Active Publication Date: 2020-04-14
BEIJING SCITECH NANOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Although my country is the largest producer of fruits and vegetables, the commercialization rate after picking is less than 20%, which is far lower than 98% in developed countries
In order to prolong the fresh-keeping time and prevent the roots from rotting, wholesalers will dip baby vegetables in formaldehyde solution to extend the fresh-keeping time when packing them. Although this prolongs the fresh-keeping time, eating baby vegetables containing formaldehyde will do great harm to the body

Method used

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  • A waterproof and breathable paper and a waterproof and breathable fresh-keeping film prepared by using the paper
  • A waterproof and breathable paper and a waterproof and breathable fresh-keeping film prepared by using the paper
  • A waterproof and breathable paper and a waterproof and breathable fresh-keeping film prepared by using the paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 1 As shown, a kind of waterproof breathable fresh-keeping film of the present invention comprises perforated fresh-keeping film and waterproof breathable paper, is prepared on the fresh-keeping film by a puncher into a circular or square hole lattice with a size of 0.5-3cm. Hole fresh-keeping film, put the food filter paper in the PH=4.0-5.5, the concentration is 50g / l the fluoropolymer emulsion of 50g / l and soak three times, dry at the temperature of 110-130°C respectively, and then bake at the high temperature of 150°C for 3 This kind of waterproof and breathable paper can be obtained in 5 minutes, and the waterproof and breathable fresh-keeping film can be obtained by bonding the waterproof and breathable paper and the perforated plastic wrap through PE glue or hot pressing.

[0038] The obtained waterproof and breathable paper and the folded waterproof and breathable paper are scanned by electron microscope and contact angle detection, the results are...

Embodiment 2

[0042]Take the storage of bananas and apples as an example, put two bananas and an apple of the same size in two fruit pots with a diameter of 20cm, and then stick three pieces of waterproof and breathable paper with a size of 3cm×3cm on the top of one basin. Xinxinqiaoshou brand PE plastic wrap, the thickness of the plastic wrap is 6μm, and the diameter of the hole is 2cm×2cm. The other pot was covered with a 6μm-thick PE cling film without waterproof and breathable paper. After 5 days and later, there was no obvious water drop in the cling film of the waterproof and breathable paper, but there were a lot of water drops on the ordinary cling film. Produced, the effects of different fresh-keeping films on bananas and apples are compared, such as Figure 6 Shown, illustrate that this waterproof air-permeable fresh-keeping film has excellent air permeability.

Embodiment 3

[0044] Taking the storage of Chinese cabbage as an example, weigh 8 pieces of Chinese cabbage that are basically the same size, and place them in air (without film), sealed fresh-keeping bags, 2-hole fresh-keeping bags, 8-hole fresh-keeping bags, 18-hole fresh-keeping bags, and 2-hole fresh-keeping bags. One filter paper fresh-keeping bag, a fresh-keeping bag with 8 filter papers, and a fresh-keeping bag with 24 filter papers, and then store in the air at room temperature. The fresh-keeping bag is Miaojie thickened fresh-keeping bag, the size is 35cm×25cm, 8μm, the pore size is 2cm×2cm, the filter paper has been hydrophobized, and its size is 3cm×3cm. After 31 days of storage and preservation, the results are as follows: Figure 7 shown, from Figure 7 It can be seen that the fresh-keeping effect of Chinese cabbage with 8 filter paper fresh-keeping bags and 8-hole fresh-keeping bags is better, but from the perspective of color freshness, the 8-piece filter paper fresh-keeping ...

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Abstract

The invention discloses waterproof breathable paper and a waterproof breathable preservative film prepared by adopting the same. The waterproof breathable paper is obtained by carrying out hydrophobictreatment on food packaging paper, the contact angle of the food packaging paper is larger than or equal to 120 degrees, the thickness is 300-350 microns, air vents with hole diameter of 15-20 microns are formed all over the waterproof breathable paper, and air permeability is 3500-6000 ml / min. The waterproof breathable preservative film comprises a porous preservative film (1), and the waterproof breathable paper (2) which is inlaid in preservative film holes (3). According to the waterproof breathable paper and the waterproof breathable preservative film prepared by adopting the same, the process is simple, the cost is low, the important function is achieved on prolonging of the food storage period or freshness preserving, and the high market popularization and application prospect is achieved.

Description

technical field [0001] The invention belongs to the technical field of food preservation, in particular, the invention relates to a waterproof and air-permeable paper and a waterproof and air-permeable fresh-keeping film prepared by using the paper. Background technique [0002] Although my country is the largest producer of fruits and vegetables, the commercialization rate after picking is less than 20%, which is far lower than 98% in developed countries. How to improve the preservation rate of fruits and vegetables in the market is of great significance to improve the market competition level of fruits and vegetables in our country. [0003] Fruits and vegetables are still living organisms after being picked. Due to respiration, various gases and moisture will be produced. If the gases and moisture are in a closed environment, the fruits and vegetables will be ripened and aged. At the same time, the moisture will form a humid environment. The environment makes it easy for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65D65/38B65D81/26B65D85/34
Inventor 田野明鹏江雷
Owner BEIJING SCITECH NANOTECH CO LTD
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