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High barrier water-based adhesive

An adhesive and barrier technology, used in water-based adhesives, composite films, and high-barrier water-based adhesives, and in the field of preparing the composite films, it can solve problems such as environmental damage, lack of bonding function, and volatile organic compound emissions. Effects of bond strength, excellent oxygen barrier properties, good processability and workability

Active Publication Date: 2021-06-01
刘建林
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The adhesives used in the prior art are all organic solvents, which will cause the emission of volatile organic compounds (VOC) during the processing of packaging materials, thus causing great pressure on environmental protection and causing damage to the environment
In addition, the adhesives used in the prior art usually do not have functions other than bonding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0190] According to the following ratio, add polyvinyl alcohol-1799 and water into a heatable reaction vessel, and heat to 80°C-90°C under stirring to dissolve completely. After the temperature drops to 35°C-10°C, add a mixture of epoxy resin and melamine resin (0.3:1 weight ratio), stir and mix thoroughly, heat to 40°C-45°C and keep it warm for 8 hours, then drop to room temperature (25°C-15°C), the high-barrier water-based adhesive main agent is obtained after filtration, the main agent does not produce gel phenomenon when stored at 10°C-40°C for 70 days, and has good storage stability. Add citric acid and stir thoroughly before use to obtain a high-barrier water-based adhesive.

[0191]

[0192] Use the prepared high-barrier water-based adhesive to compound BOPP film and PE film. The process is as follows: On the dry laminating machine, the BOPP film with a thickness of 20 μm is placed on the main unwinder, and the high-barrier water-based adhesive is coated on the BOPP ...

Embodiment 2

[0195] According to the following ratio, add polyvinyl alcohol-1788 and water into a heatable reaction vessel, and heat to 60°C-70°C under stirring to dissolve completely. After the temperature drops to 20°C-10°C, add saturated polyester, stir and mix thoroughly, heat to 50°C-70°C, keep warm for 12 hours, then drop to normal temperature (15°C-10°C), filter to obtain high barrier Water-based adhesive main agent, the main agent does not produce gel phenomenon when stored at 10°C-40°C for 70 days, and has good storage stability. Add glyoxal and stir thoroughly before use to obtain a high-barrier water-based adhesive.

[0196]

[0197]

[0198]Use the prepared high-barrier water-based adhesive to compound BOPA film and PE film. The process is as follows: On the dry laminating machine, place a BOPA film with a thickness of 15 μm on the main unwinder, and apply the high-barrier water-based adhesive on the BOPA film. The amount of glue is 8 grams per flat. Dry the glue after ...

Embodiment 3

[0201] Add the mixture of polyvinyl alcohol and polyvinylpyrrolidone (1:0.5 weight ratio) and water into a heatable reaction vessel according to the following ratio, and heat to 80°C-90°C under stirring to dissolve completely. After the temperature drops to 30°C-20°C, add polyurethane, stir and mix thoroughly, heat to 45°C and keep it warm for 7 hours, then drop to normal temperature (29°C-20°C), and filter to obtain the main agent of water-based adhesive. It does not produce gel phenomenon when stored at 10°C-30°C for 30 days, and has good storage stability. Add the oxazoline polymer and stir thoroughly before use to obtain the water-based adhesive.

[0202]

[0203] Use the prepared high-barrier water-based adhesive to compound BOPP film and CPP film. The process is as follows: On the dry laminating machine, the BOPP film with a thickness of 15 μm is placed on the main unwinder, and the high-barrier water-based adhesive is coated on the BOPP film. The amount of glue is 5...

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Abstract

The invention relates to the field of packaging materials, in particular to a high-barrier water-based adhesive, a method for preparing the water-based adhesive and uses of the water-based adhesive. The invention also relates to a composite film comprising an adhesive barrier layer formed from the aqueous adhesive of the invention. The invention also relates to a method for producing said composite film, to the use of said composite film and to a package comprising said composite film.

Description

technical field [0001] The invention relates to the field of packaging materials, in particular to a high-barrier water-based adhesive, a method for preparing the water-based adhesive and uses of the water-based adhesive. The invention also relates to a composite film comprising an adhesive barrier layer formed from the aqueous adhesive of the invention. The invention also relates to a method for producing said composite film, to the use of said composite film and to a package comprising said composite film. Background technique [0002] Although plastic packaging has been widely used in food and non-food packaging materials, ordinary plastic packaging has poor barrier properties to gases (such as oxygen, carbon dioxide gas, aroma) or water vapor. Food packaging materials are required to have a good barrier to oxygen. The reason is that oxygen in the environment will cause food oxidation, resulting in browning, rancidity, odor and odor, and mold, which is likely to cause he...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J129/04C09J139/06C09J175/04C09J167/00C09J11/06C09J179/02C09J11/04C09J179/04B32B27/32B32B27/08B32B27/34B32B27/36B32B7/12B32B37/06B32B37/10B32B37/12B32B38/16
CPCB32B7/12B32B27/08B32B27/32B32B27/34B32B27/36B32B37/06B32B37/10B32B37/1284B32B38/164B32B2307/7244B32B2323/04B32B2323/10B32B2367/00B32B2377/00B32B2553/00C08K2003/2227C08K2201/011C09J11/04C09J11/06C09J129/04C09J139/06C08L63/00C08L61/28C08K5/092C08L67/00C08K5/07C09J175/04C09J179/04C08L79/02C08K3/22
Inventor 刘燕王灿军刘建林
Owner 刘建林
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