Detection method for adhesion of gravure ink for plastic film

A detection method and technology for plastic films, which are applied in measuring devices, analytical materials, instruments, etc., can solve the problems of inability to detect plastic films, ink shedding, hidden dangers of food safety, etc. Good results

Inactive Publication Date: 2013-10-02
ZHENGXIN PACKAGING CO LTD DONGGUAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing ink adhesion testing methods mainly include sticking, rubbing, boiling, soaking, etc. However, none of the above methods can detect the adhesion of the ink to the plastic film after the softening of the plastic film when the plastic film shrinks at high temperature. For qualified products, when the plastic film is used for high-temperature shrink packaging, ink still falls off on the packaged object, which brings great food safety hazards to suppliers, customers, and consumers in the food packaging supply chain.

Method used

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  • Detection method for adhesion of gravure ink for plastic film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A gravure plastic film ink adhesion detection method, it is made up of following detection steps:

[0033] (1) Flatten the plastic film printed with the ink layer, and then paste the adhesive tape on the upper surface of the ink layer evenly, and roll it three times with a pressure roller with a constant load of 25N to obtain the sample;

[0034] (2) Place the sample obtained in step (1) on the platform between the upper and lower heating plates of the heat-sealing apparatus, the tightening pressure between the upper and lower heating plates is 2N, the heating temperature is 180°C, and the heating time is In 3.5 seconds, the surface area of ​​the heat-sealing device heating and contacting the adhesive tape is 16mm*20mm;

[0035] (3) Cool the sample obtained in step (2) to room temperature, and tear the adhesive tape in the same direction. The angle β formed by the adhesive tape and the plastic film is 140°. Observe whether the ink layer has Flaky peeling and whether th...

Embodiment 2

[0039] A gravure plastic film ink adhesion detection method, it is made up of following detection steps:

[0040] (1) Lay the plastic film printed with the ink layer flat, then paste the adhesive tape on the upper surface of the ink layer flatly, and use a pressure roller with a constant load of 20N to roll four times in the same direction to obtain a sample ;

[0041] (2) Place the sample obtained in step (1) on the platform between the upper and lower heating plates of the heat sealer, the tightening pressure between the upper and lower heating plates is 1N, the heating temperature is 220°C, and the heating time is In 2 seconds, the surface area of ​​the heat-sealing device heating and contacting the adhesive tape is 15mm*22mm;

[0042] (3) Cool the sample obtained in step (2) to room temperature, and tear the adhesive tape in the same direction. The angle β formed by the adhesive tape and the plastic film is 130°. Observe whether the ink layer has Flaky peeling and whethe...

Embodiment 3

[0045] A gravure plastic film ink adhesion detection method, it is made up of following detection steps:

[0046] (1) Lay the plastic film printed with the ink layer flat, then paste the adhesive tape on the upper surface of the ink layer flatly, and use a pressure roller with a constant load of 22N to roll four times in the same direction to obtain a sample ;

[0047] (2) Place the sample obtained in step (1) on the platform between the upper and lower heating plates of the heat sealer, the tightening pressure between the upper and lower heating plates is 1.5N, the heating temperature is 200°C, and the heating time is For 2.5 seconds, the area of ​​the plane where the heat sealer heats and contacts the adhesive tape is 16mm*21mm;

[0048] (3) Cool the sample obtained in step (2) to room temperature, and tear the adhesive tape in the same direction. The angle β formed by the adhesive tape and the plastic film is 135°. Observe whether the ink layer has Flaky peeling and whether...

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Abstract

The invention relates to a detection method for adhesion of a gravure ink for a plastic film. The detection method comprises the following steps of (1) laying a plastic film printed by an ink layer, and adhering an adhesive tape on an upper surface of the ink layer smoothly, and rolling the adhesive tape for a plurality of times by a press roller to obtain a sample; (2) placing the sample obtained by the step (1) on a platform between an upper heating plate and a lower heating plate of a heat-sealing device to carry out a heat lamination operation; (3) cooling the sample obtained by the step (2) to a room temperature, then tearing the adhesive tape along the same direction to observe exfoliation conditions of the ink layer; and (4) determining the adhesion of the ink as qualified if exfoliation does not appear on the oil layer and the ink is not adhered on the adhesive tape, or else, determining the adhesion of the ink as unqualified. The detection method can simulate actual application conditions of the plastic film actually, can reflect the adhesion of the ink more directly and actually, has simple requirements for equipment, has no special requirements for the detection environment, and is simple in operations.

Description

technical field [0001] The invention belongs to the technical field of package quality detection, and in particular relates to a method for detecting ink adhesion of gravure plastic film. Background technique [0002] Plastic film is one of the most commonly used materials in the packaging field. In order to achieve the purpose of indicating product type, manufacturer information, production date, batch number and other information, as well as market promotion, it is necessary to print ink patterns on the plastic film. In order to improve the printing quality , To prevent the ink from falling off, it is necessary to detect the adhesion of the printing ink. [0003] The existing ink adhesion testing methods mainly include sticking, rubbing, boiling, soaking, etc. However, none of the above methods can detect the adhesion of the ink to the plastic film after the softening of the plastic film when the plastic film shrinks at high temperature. For qualified products, when plast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N19/04
Inventor 黄卫东陈喜扬黄伟东全明德罗振华林城莫应文袁晓文黄海军
Owner ZHENGXIN PACKAGING CO LTD DONGGUAN
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