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Fruit and vegetable preservation film and preparation method thereof

A technology for plastic wrap, vegetables and fruits, which is applied to other household appliances, chemical instruments and methods, flexible coverings, etc., can solve the problems of increasing the shelf life of vegetables and fruits, no antibacterial and mildew-proof effect, and easy corruption of fruits and vegetables, etc. Reduce the chance of mold and bacteria, inhibit the respiration of fruits and vegetables, and maintain the effect of green nutrition

Inactive Publication Date: 2020-06-12
NANYA PLASTICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies of the above-mentioned prior art and solve the shortcomings of the existing fresh-keeping materials such as poor air permeability, no antibacterial and anti-mildew effect, easy corruption of fruits and vegetables, complicated manufacturing process and high cost, the present invention proposes a polypropylene composition for fresh-keeping vegetables and fruits The invention and its preparation method have the advantages of simple process, low cost, effective prolongation of fresh-keeping period of fruits and vegetables, and increase of storage period of fruits and vegetables on the shelf, which not only reduces food waste caused by packaging and logistics transportation of fruits and vegetables after harvesting, but also applies to Fresh-keeping applications in various stages of the fruit and vegetable supply chain, including blue bags for fresh-keeping vegetables and fruits used in B2B after harvesting, fresh-keeping bags for vegetables and fruits used in B2C shelf display, and fresh-keeping products such as vegetable and fruit plastic wrap for general household use, reducing waste Generate, save energy, reduce carbon, and protect the earth

Method used

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  • Fruit and vegetable preservation film and preparation method thereof
  • Fruit and vegetable preservation film and preparation method thereof
  • Fruit and vegetable preservation film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Produce three layers of thickness 0.02mm to extrude vegetable and fruit preservative film 30 altogether, and its preparation method is:

[0050] According to the specific formula in Table 1, (1) a. Intermediate co-extruded film: polypropylene resin, anti-fogging agent; b. Upper layer co-extruded film: polypropylene resin, inorganic oxide powder; c. Lower layer co-extruded film: polypropylene Acrylic resin, inorganic oxide powder, and fresh-keeping masterbatch; after being uniformly mixed with a mixer, they are introduced into a three-layer co-extruder for uniform melting and mixing;

[0051] The temperature of the material is controlled at 220-260°C. After the fully reacted mixture melt passes through the T-shaped die, it is cooled to form a polypropylene composition sheet. After forming, it is stretched longitudinally and transversely in a special stretching machine. , after the extension ratio is 4-10 times, the long-acting polypropylene composition 30 for keeping fru...

Embodiment 2

[0054] Except that the addition ratio of fresh-keeping masterbatch is 3.44PHR which is different from that of Example 1, the other raw material formulations and preparation methods of the obtained vegetable and fruit fresh-keeping film 30 are all the same as that of Example 1.

[0055] The test results are shown in Table 1, showing that the prepared vegetable and fruit plastic wrap 30 has good appearance, crispness, chlorophyll content, and lower weight loss rate and CO 2 / O 2 Gas concentration, fresh-keeping effect is better than embodiment 1.

Embodiment 3

[0057] Except that the addition ratio of fresh-keeping masterbatch is 7.77PHR, which is different from that of Example 1, the other raw material formulas and preparation methods of the obtained vegetable and fruit fresh-keeping film 30 are all the same as that of Example 1.

[0058] The test results are shown in Table 1, showing that the prepared vegetable and fruit plastic wrap 30 has excellent appearance, crispness, chlorophyll content, and low weight loss rate and CO 2 / O 2 Gas concentration, fresh-keeping effect is better than embodiment 2 again.

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Abstract

A preparation method of a fruit and vegetable preservation film is used for preparing a three-layer co-extrusion film having a thickness ranging from 0.02 mm to 2.0 mm. A preservation master-batch composed of 5-20% of an inorganic nano-powder and 80-95% of a resin material is uniformly distributed in one layer of the co-extrusion film. The film has a good moisturizing effect over time, keeps fruits and vegetables fresh, delays aging, and is suitable for the preservation of various types of fruits and vegetables.

Description

technical field [0001] The invention relates to a polypropylene composition, in particular to a polypropylene composition for keeping vegetables and fruits fresh and a preparation method thereof, which can prolong the freshness of vegetables and fruits. Background technique [0002] Vegetables and fruits are indispensable and necessary food for human beings. Vegetables and fruits are rich in dietary fiber, vitamins and minerals. They have health benefits such as increasing satiety, improving gastrointestinal motility and lowering blood cholesterol. They are also nutrients needed for maintaining health. Many research reports have pointed out that one of the reasons for suffering from chronic diseases is insufficient intake of fruits and vegetables. The World Health Organization and many advanced countries have listed the intake of fruits and vegetables as an important advocacy item and encouraged people to eat more fruits and vegetables. This shows that the importance of fruit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B32B27/18B32B27/08B29C48/08B29C48/18B29C55/12B65D30/08B65D65/40
CPCB32B27/08B32B27/18B32B27/32B32B2250/03B32B2250/242B32B2307/7145B65D31/02B65D65/40B29C48/0018B29C48/08B29C48/18B32B1/00B32B2264/102B32B2307/412B32B2307/732B32B2439/70B29B7/42B29B7/429B29K2023/12B29K2509/00B32B27/20B32B2439/06B32B2553/00B29C48/21B29C48/288B29C48/40B29C48/9135B29C48/92B29C2948/92704
Inventor 廖德超曹俊哲赖振和袁敬尧
Owner NANYA PLASTICS CORP