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Diatomite-containing plastic packaging film for selectively absorbing ethylene, and preparation method

A technology of diatomite and packaging film, which is applied in the field of plastic packaging film for selectively adsorbing ethylene and its preparation, can solve the problems of poor safety, poor adsorption effect, poor performance, etc. low performance effect

Inactive Publication Date: 2018-11-20
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] It can be seen that the packaging materials used for fruits and vegetables in the prior art have a poor adsorption effect on ethylene, which leads to the aging and deterioration of fruits and vegetables, and the existing method of adding potassium permanganate oxidizing agents is poor in safety. Adding molecular sieves or activated carbon The method of adsorbent is easy to affect the mechanical properties of packaging materials, and there are problems such as poor performance

Method used

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  • Diatomite-containing plastic packaging film for selectively absorbing ethylene, and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] a. Add cuprous chloride to water to make a dispersion liquid, which is firmly loaded in the pores of diatomite by spray deposition, then mixed with olivine powder, and added to the latex liquid, stirred evenly, and freeze-dried to obtain a network Modified diatomite protected by chemical coating;

[0031] b. Mixing the modified diatomite prepared in step a with the matrix resin of the adsorption layer, heating and melting, and casting to form a film to obtain a thin film of the adsorption layer;

[0032] c. Bonding and compounding the foamed shockproof layer, the porous ultrafiltration membrane, the adsorption layer film, and the PET substrate layer sequentially from bottom to top to prepare a plastic packaging film that selectively adsorbs ethylene.

[0033] In step a, the latex liquid is polyacrylic acid resin latex liquid with a solid content of 25wt%; in step b, the matrix resin of the adsorption layer is polypropylene; the adhesive for bonding and compounding is an...

Embodiment 2

[0037]a. Add cuprous chloride to water to make a dispersion liquid, which is firmly loaded in the pores of diatomite by spray deposition, then mixed with olivine powder, and added to the latex liquid, stirred evenly, and freeze-dried to obtain a network Modified diatomite protected by chemical coating;

[0038] b. Mixing the modified diatomite prepared in step a with the matrix resin of the adsorption layer, heating and melting, and casting to form a film to obtain a thin film of the adsorption layer;

[0039] c. Bonding and compounding the foamed shockproof layer, the porous ultrafiltration membrane, the adsorption layer film, and the PET substrate layer sequentially from bottom to top to prepare a plastic packaging film that selectively adsorbs ethylene.

[0040] In step a, the latex liquid is a polyacrylic resin latex liquid with a solid content of 25wt%; in step b, the matrix resin of the adsorption layer is polyvinyl chloride; the adhesive for bonding and compounding is a...

Embodiment 3

[0044] a. Add cuprous chloride to water to make a dispersion liquid, which is firmly loaded in the pores of diatomite by spray deposition, then mixed with olivine powder, and added to the latex liquid, stirred evenly, and freeze-dried to obtain a network Modified diatomite protected by chemical coating;

[0045] b. Mixing the modified diatomite prepared in step a with the matrix resin of the adsorption layer, heating and melting, and casting to form a film to obtain a thin film of the adsorption layer;

[0046] c. Bonding and compounding the foamed shockproof layer, the porous ultrafiltration membrane, the adsorption layer film, and the PET substrate layer sequentially from bottom to top to prepare a plastic packaging film that selectively adsorbs ethylene.

[0047] In step a, the latex is polyacrylic acid resin latex with a solid content of 25wt%; in step b, the matrix resin of the adsorption layer is polylactic acid; the adhesive for bonding and compounding is an amino resin...

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Abstract

The invention discloses a diatomite-containing plastic packaging film for selectively absorbing ethylene, and a preparation method. The plastic packaging film is prepared by the following steps that a, cuprous chloride dispersing liquid mist is deposited and loaded on diatomite to be mixed with olivine powder and added into a latex solution, and modified diatomite protected by a networked wrappinglayer is prepared; b, the modified diatomite and substrate resin are mixed to be subjected to flow coating film formation to prepare an absorbing layer film; and c, a foamed quakeproof layer, the absorbing layer film and a PET substrate layer are stuck and compounded sequentially, and the diatomite-containing plastic packaging film for selectively absorbing ethylene is prepared. The method has the following beneficial effects that the modified diatomite loaded with cuprous chloride is dispersed evenly in a compound packaging material to serve as an ethylene absorbing agent, a large amount ofethylene can be absorbed and fixed, the expiration time of the packaging material is prolonged, the plastic packaging film is very suitable for refreshment of fruits, the influence on the mechanical property of the packaging material is low, and the use performance is good.

Description

technical field [0001] The invention relates to the field of packaging films, in particular to a packaging film for selectively adsorbing ethylene, in particular to a diatomite-containing plastic packaging film for selectively adsorbing ethylene and a preparation method thereof. Background technique [0002] With the development of the economy and the improvement of living standards, people's dietary life has transitioned from the single type of food and clothing in the past to the current type of diversified nutrition. The demand for fruit is increasing, and the requirements for its freshness are also increasing. Fresh fruits continue to breathe after picking, and the respiration is accompanied by metabolism, water evaporation and ethylene production, which promotes the further ripening of fruits and vegetables; this storage environment also makes it easy for bacteria to breed and multiply rapidly, resulting in fruit rot. Ethylene gas is a plant growth hormone. Although e...

Claims

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Application Information

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IPC IPC(8): B29D7/01C08L23/12C08L27/06C08L67/04C08L33/04C08K13/04C08K7/26C08K3/16
CPCB29D7/01C08J5/18C08J2323/12C08J2427/06C08J2433/04C08J2467/04C08K3/16C08K7/26C08K13/04
Inventor 陈庆昝航
Owner CHENDU NEW KELI CHEM SCI CO LTD
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