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Coating liquid for barrier layer, preparation and barrier film thereof

A technology of coating liquid and barrier layer, applied in the direction of coating, etc., can solve the problems affecting the interface compactness of the coating, the gap in gas barrier properties, and the complex process, and achieve excellent oxygen barrier and water barrier properties, excellent gas barrier properties. , the effect of simple process

Active Publication Date: 2020-12-11
CHINA LUCKY FILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Chinese patent CN200980113160.4 proposes coating metal alkoxide-modified polyacrylic acid barrier coatings on both sides of the base film, then dip-coating in a multivalent metal ion solution after high-temperature treatment, and then performing high-temperature treatment again treatment to form an ion cross-linked layer between the modified polyacrylic acid coating and the metal ions, and prepare a film material with excellent barrier properties. This method requires multiple coating processes, dip coating processes and high-temperature treatment processes, and the process is complicated. , the cost is higher, and it is not conducive to the technical promotion of the product
Since the zinc oxide in the inorganic oxide coating is covered by two-component polyurethane, it shows poor affinity with the modified polyacrylic acid coating, which affects the compactness between the coating interfaces, and because the polyacrylic acid is flexible The macromolecular chains of zinc oxide can only be neutralized and modified by introducing zinc oxide, and the effect is not obvious; so this type of gas barrier film cannot achieve the water and oxygen barrier performance of vacuum coating barrier technology
[0008] In summary, barrier coating technology is simpler than vacuum coating barrier technology, but there is still a big gap in gas barrier performance compared with vacuum coating barrier technology

Method used

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  • Coating liquid for barrier layer, preparation and barrier film thereof
  • Coating liquid for barrier layer, preparation and barrier film thereof
  • Coating liquid for barrier layer, preparation and barrier film thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Coating solution preparation for barrier coating:

[0064] 170.0 parts by mass of polyacrylic acid aqueous solution (molecular weight 5000) with a solid content of 20%, 2.5 parts by mass of gamma-aminopropyltriethoxysilane (KH550), polyvinyl alcohol with a solid content of 5% (polymerization degree 2600, degree of alcoholysis 99%) and 170 parts by mass of the three components were uniformly mixed and stirred at 80° C. for 30 minutes at a high speed to obtain ester crosslinking modified polyacrylic acid liquid ZJ-01.

[0065] 32 parts by mass of tetraethoxysilane, 6.6 parts by mass of silane coupling agent (A187), 6.0 parts by mass of dilute hydrochloric acid (0.1% by mass), 260 parts by mass of methanol, and 600 parts by mass of deionized water are mixed evenly, and stirred at a high speed at room temperature A solution of metal alkoxide hydrolysis condensate L-1 is formed.

[0066] Mix 342.5 parts by mass of the polyacrylic acid solution ZJ-01 solution modified by est...

Embodiment 2

[0072] Coating solution preparation for barrier coating:

[0073] 170.0 parts by mass of polyacrylic acid aqueous solution (molecular weight 25000) with a solid content of 20%, 2.5 parts by mass of gamma-aminopropyltriethoxysilane (KH550), polyvinyl alcohol with a solid content of 5% (polymerization degree 2600, degree of alcoholysis 99%) and 90 parts by mass of the three components were uniformly mixed and stirred at 80° C. for 30 minutes at high speed to obtain ester crosslinking modified polyacrylic acid liquid ZJ-02.

[0074] 32 parts by mass of tetraethoxysilane, 6.6 parts by mass of silane coupling agent (A187), 6.0 parts by mass of dilute hydrochloric acid (0.1% by mass), 260 parts by mass of methanol, and 600 parts by mass of deionized water are mixed evenly, and stirred at a high speed at room temperature A solution of metal alkoxide hydrolysis condensate L-1 is formed.

[0075] Mix 262.5 parts by mass of ester-crosslinked polyacrylic acid solution ZJ-02 and 737.5 pa...

Embodiment 3

[0079] Coating solution preparation for barrier coating:

[0080] Prepare coating liquid SC-2 according to the preparation method of embodiment 2

[0081] Preparation of the barrier film:

[0082]The coated surface of the 12μm PET base film is treated with corona or plasma, and SC-2 is coated on both sides of the base film with double-sided coating equipment, and cured at 120°C for 3 minutes to obtain a barrier coating with a total thickness of 2.4μm. Barrier film; remove it after coating and store it dry to obtain a barrier film.

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Abstract

The invention discloses a coating liquid for a barrier layer, preparation and a barrier film thereof. The coating liquid comprises the following components in parts by mass: 0.4-20 parts of a carboxyl-containing polymer (A), 0.20-5.0 parts of a hydroxyl-containing water-soluble polymer (B), 0.01-3 parts of a coupling agent (C) with carboxyl reactive groups, 1.7-13 parts of a hydrolytic condensateof metal alkoxide (L) and 30-95 parts of a solvent. According to the invention, a carboxyl-containing polymer (A) is used as a main agent, and excellent gas-blocking and water-blocking properties areshown after two-step modification of ester crosslinking and inorganic hybridization; and the barrier film disclosed by the invention is realized through coating, is simple in preparation process, highin production efficiency and low in cost, and can be applied to the fields of food packaging, medicine packaging, flexible packaging of photoelectric devices and the like.

Description

Technical field: [0001] The invention relates to the field of film technology, in particular to a coating solution for a barrier film. Background technique: [0002] In order to avoid the deterioration of the contents of the package and maintain its function and performance, the packaging materials used for flexible packaging of food, medicine and optoelectronic devices are required to prevent the deterioration of the contents of the package caused by the passage of gases (especially oxygen, water vapor, etc.) through the packaging materials. performance. Therefore, packaging materials are required to have sufficiently low gas barrier properties. [0003] In recent years, people have been actively developing transparent packaging materials with excellent gas barrier properties and fragrance retention. At present, film materials with a barrier layer formed of inorganic oxide films such as silicon oxide and aluminum oxide are commonly used. The thin film material of this typ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/02C09D129/04C09D7/61C09D7/63C08J7/048C08J7/043C08J7/06C08J7/12C08L67/02
CPCC09D133/02C09D7/63C08J7/048C08J7/0423C08J7/043C08J7/06C08J7/123C08J7/042C08J2367/02C08J2433/02C08J2429/04C08J2483/08C08J2475/04C08J2467/00C08J2433/04C08L2201/14C08L2203/16C08L29/04C08K5/544C08K3/36C08K5/548C08K13/02C08K3/22
Inventor 刘军虎纪雪梅郑燕冯铭竹刘贤豪
Owner CHINA LUCKY FILM CORP
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