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Cover film with low coating weight and good sealing and preparation method thereof

A technology with high sealing and coating volume, applied in the direction of film/sheet adhesives, non-polymer adhesive additives, adhesive additives, etc., can solve the problems of over-coating, over-packaging, etc., and achieve coating The effect of reducing the amount, heating uniformly, and reducing production costs

Inactive Publication Date: 2017-02-15
广东基顺隆新型药用包装材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Coating solvent-based heat-sealing adhesive on the cover film, there are also cases of over-coating and over-packaging

Method used

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  • Cover film with low coating weight and good sealing and preparation method thereof
  • Cover film with low coating weight and good sealing and preparation method thereof
  • Cover film with low coating weight and good sealing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A low-coating high-sealing cover film comprises a polyester / aluminum foil composite film base material, a ternary vinyl acetate resin layer on the base material, and a heat-sealing adhesive layer on the ternary vinyl chloride resin layer.

[0034] A method for preparing a low-coating high-tightness cover film, comprising the following steps:

[0035] 1) Coating ternary vinyl acetate resin: Mix ternary vinyl acetate resin and methyl ethyl ketone at a mass ratio of 1:4 to obtain a mixed solution, and apply the mixed solution on the polyester / aluminum foil composite film base by metal gravure coating on the aluminum foil side of the material, and then put it into a hot air drying oven composed of 5 ovens for drying and cooling treatment. , the dry hot air volume of each oven is controlled at 2900m 3 / h, after leaving the oven, it is cooled by an S-type cooling water roll, and it is wound up with a coating machine to obtain a substrate / ternary vinyl chloride resin composite ...

Embodiment 2

[0038] A low-coating high-sealing cover film comprises a paper / aluminum foil composite film base material, a ternary vinyl chloride resin layer on the base material, and a heat-sealing adhesive layer on the ternary vinyl chloride resin layer.

[0039] A method for preparing a low-coating high-tightness cover film, comprising the following steps:

[0040] 1) Coating ternary vinyl acetate resin: Mix ternary vinyl acetate resin and methyl ethyl ketone at a mass ratio of 1:4.5 to obtain a mixed solution, and apply the mixed solution on the paper / aluminum foil composite film substrate by metal gravure coating On the side of the aluminum foil on the top, then put it into a hot air drying oven composed of 5 ovens for drying and cooling treatment. The temperature of the oven is set to 70°C, 100°C, 150°C, 200°C in turn, and the last section blows cold air drying section , the dry hot air volume of each oven is controlled at 2900m 3 / h, after leaving the oven, it is cooled by an S-type...

Embodiment 3

[0043] A cover film with low coating amount and high sealing performance comprises an aluminum foil base material, a three-component vinyl chloride resin layer on the base material, and a heat-sealing adhesive layer on the three-component vinyl chloride resin layer.

[0044] A method for preparing a low-coating high-tightness cover film, comprising the following steps:

[0045] 1) Coating ternary vinyl acetate resin: mix ternary vinyl acetate resin with methyl ethyl ketone in a mass ratio of 1:5 to obtain a mixed solution, and apply the mixed solution on the aluminum foil substrate by metal gravure coating, and then Put it into a hot air drying oven composed of 5 ovens for drying and cooling treatment. The temperature of the oven is set to 80°C, 110°C, 180°C, and 220°C in sequence. The air volume is controlled at 2900m 3 / h, after leaving the oven, it is cooled by an S-type cooling water roll, and it is wound up with a coating machine to obtain a substrate / ternary vinyl chlor...

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Abstract

The invention discloses a cover film with low coating weight and good sealing and a preparation method of the cover film. The cover film comprises a substrate, a vinisol cooh layer located on the substrate and a heat-seal glue layer located on the vinisol cooh layer, wherein the substrate is a polyester / aluminum foil composite film, a paper / aluminum foil composite film or aluminum foil. According to the cover film, a metallic substrate is coated with vinisol cooh which has excellent adhesive force to a metallic surface and acrylic resin which has good hardness and adhesive force, so the cover film with low coating weight (the coating weight of dry glue is about 2.0 g / m<2>) and good sealing is obtained, and the shortcomings that the heat-seal glue layer of a traditional cover film is wavy and out of flatness are overcome. At the same time, the production cost is reduced, and the production efficiency is improved; due to the reduction of the coating weight, the resource is saved and the cover film is beneficial for environmental protection.

Description

technical field [0001] The technology of the present invention relates to gravure printing, composite and high-temperature coating heat-sealing glue technology, and specifically relates to a low-coating high-tightness cover film and its preparation method. This cover film should be mainly used in food, medicine, cosmetics or industrial Product sealing lidding film packaging industry. Background technique [0002] At present, there are generally two composite processes for producing cover film. One is to directly coat solvent-based heat-sealing adhesive on the cover film, such as heat-sealing coating for aluminum foil, hot-melt adhesive for paper or cold-sealing for plastic film. The second is to extrude a special resin suitable for the cover material on the substrate through an extrusion casting machine. These two methods can achieve the sealing performance that the cover material should have. [0003] The cover films produced by the above two processes can meet the sealing...

Claims

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Application Information

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IPC IPC(8): C09J7/02C09J7/04C09J133/00C09J127/06C09J11/04C09D127/06
CPCC09J133/00C09D127/06C09J11/04C09J2400/163C09J2400/283C09J2427/003C09J2467/006C08L27/06C08K3/36
Inventor 罗顺林
Owner 广东基顺隆新型药用包装材料有限公司
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