A kind of anti-ultraviolet, high barrier packaging film and preparation method

A high-barrier, anti-ultraviolet technology, applied in coatings and other directions, can solve the problems of dispersing and destroying material properties, poor anti-ultraviolet ability, etc., and achieve the effect of improving dispersibility, low cost, and excellent ultraviolet blocking performance

Active Publication Date: 2020-10-09
TAIZHOU LIKE TECH CO LTD
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Problems solved by technology

[0007] Aiming at the defects that existing rectorite is unevenly dispersed in plastic film and will destroy the properties of the material itself, and has poor anti-ultraviolet ability, the present invention proposes a method for preparing a packaging film with anti-ultraviolet and high barrier properties, and its technical characteristics It uses starch-coated rectorite to add polyvinylidene chloride emulsion and coat it on the film to prepare a composite film with UV resistance and high barrier properties. Its remarkable advantage is the coating of nanoparticles separated by starch. , while using the excellent ultraviolet blocking ability of rectorite itself, it protects the composite emulsion system and improves the dispersion of rectorite in the emulsion, thereby effectively promoting the ultraviolet blocking efficiency, and the whole process is relatively simple and easy to control. Low cost, broad practical prospects

Method used

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  • A kind of anti-ultraviolet, high barrier packaging film and preparation method

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Effect test

Embodiment 1

[0032] Mix 100kg sodium rectorite with 2kg quartz sand, and with the assistance of quartz sand, use a planetary ball mill to grind, so that the interlayer structure of rectorite is separated into mica-like nanoparticles; 28kg rectorite nanoparticles and Add 25kg of starch into 44kg of aqueous solution, and add 2kg of sodium lauryl sulfate, then stir at a speed of 40r / min for 15min to obtain a stable suspension; use a high-pressure spray dryer to dry the resulting suspension to solidify the starch , obtain the nano-rectorite of the layered structure of starch coating, then add in the polyvinylidene chloride emulsion to obtain composite emulsion, the mass fraction of the nano-rectorite of the layered structure of starch coating in the composite emulsion is 15%; Corona pretreatment is carried out on the polyethylene film, and then the prepared composite emulsion is evenly coated on the surface of the substrate film, and the infrared radiation with a frequency of 50 Hz is used to d...

Embodiment 2

[0035]Mix 100kg of calcium rectorite with 1kg of quartz sand, and with the assistance of quartz sand, use a stirring high-energy ball mill for grinding, so that the interlayer structure of rectorite is separated into mica-like nanoparticles; 28kg of rectorite nanoparticles And 30kg of starch was added to 41kg of aqueous solution, and 1kg of sodium lauryl sulfate was added, and then stirred at a speed of 45r / min for 12min to obtain a stable suspension; a high-pressure spray dryer was used to dry the resulting suspension to make the starch solidify to obtain the nano-rectorite of starch-coated layered structure, and then add polyvinylidene chloride emulsion to obtain a composite emulsion, and the mass fraction of the nano-rectorite of starch-coated layered structure in the composite emulsion is 20% Carry out coating acrylic resin pretreatment to polyethylene film, then the composite emulsion that will make is evenly coated on the surface of substrate film, adopts the infrared ray...

Embodiment 3

[0038] Mix 100kg potassium rectorite with 1.5kg quartz sand, and with the assistance of quartz sand, use a vibratory high-energy ball mill to grind the rectorite interlayer structure into mica-like nanoparticles; mix 26kg rectorite nano Microparticles and 25kg of starch were added to 47kg of aqueous solution, and 2kg of sodium lauryl sulfate was added, and then stirred at a speed of 42r / min for 12min to obtain a stable suspension; a high-pressure spray dryer was used to dry the resulting suspension to make The starch is solidified to obtain the nano-rectorite of the layered structure coated with the starch, and then added to polyvinylidene chloride emulsion to obtain a composite emulsion, and the mass fraction of the layered structure of the starch-coated nano-rectorite in the composite emulsion is 25 %; Carry out corona pretreatment to polyethylene film, then the composite emulsion that makes is evenly coated on the surface of substrate film, adopts the infrared ray radiation ...

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Abstract

The invention belongs to the technical field of film preparation and provides a packaging film with anti-ultraviolet rays and high barrier properties and a preparation method. In this method, rectorite is ground into nanoparticles with the assistance of quartz sand, starch aqueous solution and sodium lauryl sulfate are added to obtain a suspension, and then dried at low temperature to obtain starch-coated nano rectorite, and vinylidene chloride is added The composite emulsion is prepared by stirring in the emulsion, and then the composite emulsion is coated on the substrate film, and after drying, a packaging film with anti-ultraviolet rays and high barrier properties is obtained. By coating the nanoparticles separated by the rectorite with starch, while using the excellent ultraviolet blocking ability of the rectorite itself, it protects the composite emulsion system and improves the dispersion of the rectorite in the emulsion, thereby effectively promoting the Ultraviolet blocking efficiency, and the whole process is relatively simple, easy to control, low cost, and has broad practical prospects.

Description

technical field [0001] The invention belongs to the technical field of film preparation and provides a packaging film with anti-ultraviolet rays and high barrier properties and a preparation method. Background technique [0002] Since the 20th century, due to the environmental pollution caused by industrial development, a large number of freon and other compounds have remained in the air, and they are decomposed into active halogens by ultraviolet rays. They then have a chain reaction with ozone, causing serious damage to the atmospheric ozone layer, making the ultraviolet rays reaching the ground increase. Due to the reduction of the concentration of the ozone layer, the short-wavelength ultraviolet rays radiated to the ground in the sunlight increase, and the increase and short-wavelength of ultraviolet rays will cause major harm and impact on human beings (including the biological world). Therefore, research on ultraviolet absorption or blocking technology is receiving mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/04C08J7/048C08J7/12C08J5/18C09D127/08C09D7/62C08L23/06
CPCC08J5/18C08J7/042C08J7/0427C08J7/123C08J2323/06C08J2427/08C08K3/346C08K9/10C08K2201/011C09D127/08
Inventor 陈庆贯大为
Owner TAIZHOU LIKE TECH CO LTD
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