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Coating material with high barrier property and preparation method thereof

A coating material and high-barrier technology, applied in the field of high-barrier coating materials and their preparation, can solve the problems of reduced gas barrier performance, reduced oxygen and moisture permeability, and poor moisture barrier effect, etc. Achieve the effect of enhancing tensile breaking strength, improving barrier properties, reducing oxygen permeability and moisture vapor permeability

Inactive Publication Date: 2018-07-24
CHANGDE JINRUN NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the present invention provides a high-barrier coating material and a preparation method thereof, which have the advantages of significantly reducing oxygen permeability and moisture vapor permeability, high-efficiency barrier, high-efficiency sterilization, and improved production efficiency, etc., to solve the problem of The existing EVOH resin has the problems that the gas barrier performance decreases with the increase of temperature, the moisture barrier effect is not good, and the technical problem that it cannot have good gas barrier performance and moisture barrier performance at the same time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 27 parts of polyvinyl alcohol, 10 parts of plasticizer, 25 parts of ethylenically unsaturated monomer, 20 parts of maleic anhydride grafted polyolefin resin, 2 parts of dibenzoyl biphenyl, 3 parts of hydrogenated After mixing sodium, 6 parts of di-tert-butyl p-phenol, 2 parts of polyoxyethylene oleyl ether and 5 parts of aluminum powder, stir at 50°C for 100 minutes; Granulate in a twin-screw extruder, the screw length-to-diameter ratio is 44:1, and then use a film blowing machine to prepare EVOH film by flat extrusion blowing method. The processing temperature of the film blowing machine is 170°C, and the inflation ratio is 2. External cooling air ring cooling, winding speed is 2m / min;

[0049] Wherein, the above-mentioned plasticizer is prepared by blending 2 parts by mass of ammonium sulfate, 5 parts by mass of trimethylolpropane and 3 parts by mass of triethyl citrate at 60° C. for 1 hour;

[0050] PVA Nano TiO 2 The sol is composed of 75 parts of polyvinyl alcoho...

Embodiment 2

[0065] 12 parts of polyvinyl alcohol, 15 parts of plasticizer, 15 parts of ethylenically unsaturated monomer, 25 parts of maleic anhydride grafted polyolefin resin, 5 parts of dibenzoyl biphenyl, 8 parts of hydroxide Sodium, 3 parts of di-tert-butyl p-phenol, 7 parts of polyoxyethylene oleyl ether and 10 parts of aluminum powder, after mixing evenly, stir at 120°C for 120 minutes; then put it into the reverse thread with 90° and 45° Granulate in a twin-screw extruder with a screw length-to-diameter ratio of 60:1, and then use a blown film machine to prepare EVOH film by flat extrusion blowing method. The processing temperature of the blown film machine is 230 ° C, and the inflation ratio is 2.5. It is cooled by an external cooling air ring, and the winding speed is 5m / min;

[0066] Among them, the above-mentioned plasticizer is prepared by blending 4 parts by mass of zinc sulfate, 3 parts by mass of trimethylolpropane and 8 parts by mass of diethylene glycol dibenzoate and rea...

Embodiment 3

[0082] 22 parts of polyvinyl alcohol, 12 parts of plasticizer, 18 parts of ethylenically unsaturated monomer, 23 parts of maleic anhydride grafted polyolefin resin, 3 parts of dibenzoyl biphenyl, 4 parts of hydrogenated Sodium, 5 parts of di-tert-butyl p-phenol, 5 parts of polyoxyethylene oleyl ether and 8 parts of aluminum powder, after mixing evenly, stir at 100°C for 110 minutes; then put it into the reverse thread with 90° and 45° Granulate in a twin-screw extruder with a screw length-to-diameter ratio of 50:1, and then use a blown film machine to prepare EVOH film by flat extrusion blowing method. The processing temperature of the blown film machine is 200 ° C, and the inflation ratio is 2.4. It is cooled by an external cooling air ring, and the winding speed is 3m / min;

[0083] Wherein, the above-mentioned plasticizer is prepared by blending 3 parts by mass of ammonium sulfate, 4 parts by mass of trimethylolpropane and 5 parts by mass of N-ethyl o-p-toluenesulfonamide at...

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Abstract

The invention discloses a coating material with high barrier property and a preparation method thereof. The coating material comprises a modified EVOH (Ethylene Vinyl Alcohol Copolymer) thin film, wherein the inner surface of the modified EVOH thin film is coated with a PVA (Polyvinyl Alcohol) nano TiO2 sol, and the outer surface of the modified EVOH thin film is coated with modified polyamide-6;the modified EVOH thin film is prepared from the following raw materials: polyvinyl alcohol, plasticizer, vinyl unsaturated monomer, maleic-anhydride grafted polyolefin resin, dibenzoylbiphenyl, sodium hydroxide, 2,6-ditertbutyl p-phenol, polyoxyethylene oil-based ether and aluminium powder; the PVA nano TiO2 sol is prepared from the following raw materials: polyvinyl alcohol, disodium 1,6-naphthalenedisulfonate, nano titanium dioxide powder, sodium polyoxyethylene nonylphenyl ether sulphate and aluminium silicate; the modified polyamide-6 sol is prepared from the following raw materials: titanium dioxide powder, anionic surfactant, caprolactam, water and molecular-weight regulator. The coating material and the preparation method disclosed by the invention have the beneficial effects thatthe technical problems that the gas-barrier property of the existing EVOH resin is reduced along with the temperature rise and the existing EVOH resin can not have good gas-barrier property and moisture-barrier property simultaneously are solved.

Description

technical field [0001] The invention relates to the technical field of packaging materials, in particular to a high-barrier coating material and a preparation method thereof. Background technique [0002] The barrier performance is mainly oxygen barrier, moisture barrier, oil barrier and odor barrier. High barrier material refers to the oxygen permeability of a film with a thickness of 25.4 μm under standard conditions (23°C, 65% RH) at 5ml / M 2 .d below, and the moisture permeability is 2g / M 2 .d following material. High-barrier plastic packaging materials have become one of the important development directions of plastic packaging materials. Now a variety of new high-barrier materials with excellent performance have been developed. These new high-barrier materials have been widely used in food and pharmaceutical packaging. . [0003] The materials used for food packaging must have high barrier properties, high temperature resistance, excellent mechanical and chemical sta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C08J5/18C08L23/08C08L51/06C08K3/08C08K3/22C09D129/04C09D7/61C09D177/02
CPCC08J5/18C08J7/04C08J2323/08C08J2429/04C08J2477/02C08K2003/0812C08K2003/2241C08K2201/011
Inventor 余赞田璐章杰钟文罗臻陈华韦雪雪张勇军杜建军
Owner CHANGDE JINRUN NEW MATERIAL TECH CO LTD
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