Plastic preservative film with high CO2/O2 permeation ratio and preparation method

A fresh-keeping film and high-permeability technology, applied in the field of fresh-keeping materials, can solve the problems that fruits and vegetables are easily damaged by carbon dioxide, cannot effectively maintain the concentration ratio, and the shelf life of fruits and vegetables is short, and achieve good economic advantages, obvious effect of air conditioning, and long shelf life. Effect

Inactive Publication Date: 2018-04-20
CHENDU NEW KELI CHEM SCI CO LTD
View PDF8 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] According to the above, the fruit and vegetable plastic wrap in the existing scheme makes the fruits and vegetables vulnerable to carbon dioxide damage during use, carbon dioxide poisoning, and deterioration. Concentration ratio, so that the shelf life of fruits and vegetables is shorter, in view of this, the present invention proposes an innovative CO 2 / O 2 Plastic cling film with high permeability ratio can effectively solve the above technical problems

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Plastic preservative film with high CO2/O2 permeation ratio and preparation method
  • Plastic preservative film with high CO2/O2 permeation ratio and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) The specific process for the preparation of mixed colloids is:

[0036] First add polyvinyl alcohol into ethanol, soak for a period of time, then filter and dry, then add deionized water and heat and stir to obtain polyvinyl alcohol colloid, then use propylene carbonate as carbon dioxide adsorbent, add propylene carbonate In the polyvinyl alcohol colloid, stir until it is evenly mixed to obtain a mixed colloid; the soaking time is 13 hours; the heating temperature is 55°C;

[0037] In the mixed colloid, the total mass parts of each component are calculated in 100 parts, including: 25 parts of polyvinyl alcohol, 50 parts of deionized water, and 25 parts of propylene carbonate;

[0038] (2) The specific process of preparation of colloid / polyethylene composite film is as follows:

[0039]Take a polyethylene film with a microporous structure, and use the whole board coating machine to evenly coat the prepared mixed colloid on the surface of the film to obtain a colloid...

Embodiment 2

[0044] (1) The specific process for the preparation of mixed colloids is:

[0045] First add polyvinyl alcohol into ethanol, soak for a period of time, then filter and dry, then add deionized water and heat and stir to obtain polyvinyl alcohol colloid, then use propylene carbonate as carbon dioxide adsorbent, add propylene carbonate In the polyvinyl alcohol colloid, stir until it is evenly mixed to obtain a mixed colloid; the soaking time is 12 hours; the heating temperature is 50°C;

[0046] In the mixed colloid, the total mass parts of each component are calculated in 100 parts, including: 20 parts of polyvinyl alcohol, 60 parts of deionized water, and 20 parts of propylene carbonate;

[0047] (2) The specific process of preparation of colloid / polyethylene composite film is as follows:

[0048] Take a polyethylene film with a microporous structure, and use the whole board coating machine to evenly coat the prepared mixed colloid on the surface of the film to obtain a colloi...

Embodiment 3

[0053] (1) The specific process for the preparation of mixed colloids is:

[0054] First add polyvinyl alcohol into ethanol, soak for a period of time, then filter and dry, then add deionized water and heat and stir to obtain polyvinyl alcohol colloid, then use propylene carbonate as carbon dioxide adsorbent, add propylene carbonate In the polyvinyl alcohol colloid, stir until it is evenly mixed to obtain a mixed colloid; the soaking time is 15 hours; the heating temperature is 60°C;

[0055] In the mixed colloid, the total mass parts of each component is calculated in 100 parts, wherein: 30 parts of polyvinyl alcohol, 40 parts of deionized water, 30 parts of propylene carbonate;

[0056] (2) The specific process of preparation of colloid / polyethylene composite film is as follows:

[0057] Take a polyethylene film with a microporous structure, and use the whole board coating machine to evenly coat the prepared mixed colloid on the surface of the film to obtain a colloid / polye...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
pore sizeaaaaaaaaaa
thicknessaaaaaaaaaa
diameteraaaaaaaaaa
Login to view more

Abstract

The invention relates to the field of preservative materials, and discloses a plastic preservative film with a high CO2 / O2 permeation ratio and a preparation method. The preparation method comprises the following preparation process: (1), firstly adding polyvinyl alcohol into ethanol to obtain a polyvinyl alcohol colloid, then adding propylene carbonate into the polyvinyl alcohol colloid, and stirring to obtain a mixed colloid, wherein the mixed colloid comprises the following raw materials: 20-30% of polyvinyl alcohol, 40-60% of deionized water and 20-30% of propylene carbonate; (2), uniformly coating the surface of a polyethylene film with the mixed colloid prepared to obtain a colloid / polyethylene composite film; and (3), overlapping the prepared composite film with a microporous polyethylene film, and extruding to obtain a double-layer composite preservative film. Compared with the conventional preservative film, the plastic preservative film prepared by the preparation method provided by the invention has the advantages as follows: carbon dioxide / oxygen permeation ratio in the film is extremely high; the concentration of carbon dioxide can be reduced and a low-oxygen environment in a bag can be maintained, so that the air conditioning effect is obvious and thus the shelf life of fruits and vegetables is long; and in addition, the plastic preservative film is simple in preparation process and low in cost and has a relatively good economic advantage.

Description

technical field [0001] The invention relates to the field of fresh-keeping materials, and provides a 2 / O 2 A plastic preservation film with a high permeability ratio and a preparation method thereof. Background technique [0002] With the improvement of living conditions, people's requirements for the quality and freshness of fruits and vegetables are increasing day by day. At the same time, long-distance transportation of fruits and vegetables and cross-season sales of fruits and vegetables are also increasing. However, due to the strong seasonality and regionality of fruit and vegetable production, the perishability of fruits and vegetables, and the diversity and complexity of the circulation environment of fruits and vegetables after picking, these factors make the preservation of fruits and vegetables a difficult problem. At present, the fresh-keeping methods of fruits and vegetables mainly include low-temperature refrigeration, controlled atmosphere storage, irradiat...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B32B27/06B32B7/12B32B37/10A23B7/148C08J5/18C08K5/109C08L29/04
CPCB32B27/32A23B7/148B32B7/12B32B27/08B32B37/10B32B2307/724C08J5/18C08K5/109C08L2203/16C08L29/04
Inventor 陈庆贯大为
Owner CHENDU NEW KELI CHEM SCI CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap