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Quality guarantee state indicator and preparation method thereof

A state indicator and indicator technology, which is applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by chemical reaction of materials, etc. requirements, did not point out how to use the specific plan of the indicator, etc., to achieve the effect of ensuring service life, excellent moisture permeability, and good chemical stability

Pending Publication Date: 2020-03-27
六安屹珹新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the packaging of pharmaceuticals and food, this solution will have the problem of water-soluble oil film contaminating the packaged objects, and the sensitivity of the liquid transmission substrate layer to the ingress of water vapor cannot meet the requirements
[0004] Patent CN102782474B proposes pigments and plastics with the function of indicating oxygen, carbon dioxide and other gases. This type of indicator can indicate oxygen, carbon dioxide and other gases very sensitively, and can be used in packaging such as food and medicine, but the patent does not point out how to Specific protocol for using this indicator
[0005] Patent CN104974380A proposes a film for indicating carbon dioxide in medical treatment and its preparation method. The presence of carbon dioxide can be visually observed through the color, but it requires the concentration of carbon dioxide to be greater than 2%, which is not suitable for high barrier packaging requirements in many occasions.
[0006] Patent CN107179314A has prepared a sticker indicating carbon dioxide. Its structure is an indicator + self-adhesive sticker. It is mainly used to detect changes in the gas atmosphere caused by sealing problems when it is sealed in a gas replacement device containing carbon dioxide. It is not used for being sealed. In the packaging, the scope of use has certain limitations

Method used

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  • Quality guarantee state indicator and preparation method thereof
  • Quality guarantee state indicator and preparation method thereof
  • Quality guarantee state indicator and preparation method thereof

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preparation example Construction

[0065] The present invention has no special limitation on the preparation method of the carbon dioxide indicator. In some embodiments of the present invention, the carbon dioxide indicator is obtained by mixing a carbon dioxide sensitive reactive dye, an alkaline substance and a solvent. Wherein the alkaline substance used is a commonly used inorganic base, the added amount is enough to ensure that the pH value of the carbon dioxide indicator is not less than 8.5, and the added amount of the solvent is enough to ensure that the concentration of the indicator is 0.1wt%-1wt%.

[0066] In certain embodiments of the invention, the oxygen indicator comprises an oxygen sensitive reactive dye and a solvent. In some embodiments of the present invention, the oxygen-sensitive reactive dyes include methylene blue, azure B, Nile blue, ruthenium terpyridine, ruthenium perchlorate, platinum octaethylporphyrinone, and proflavin one or several. In some embodiments of the present invention, t...

Embodiment 1

[0161] The polytetrafluoroethylene film (ePTFE, 100 μ m) is placed in the position where the dry compound machine is placed, and its surface is coated with polyurethane adhesive (Henkel 3100, the coating amount of the adhesive is 3g / m 2 ) and carbon dioxide indicator (reactive dyestuff is thymolphthalein, alkaline substance is potassium hydroxide, solvent is glycerin, the pH value of carbon dioxide indicator is 8.5, and the concentration of carbon dioxide indicator is 1wt%) mixed reagent, will complete coating The first permeable membrane of the cloth is dried in a drying tunnel at 10°C for 24h, then, the mixed reagent coated is melted under heating, and placed on the porous substrate (starch grafted) Acrylamide porous substrate, 230μm) lamination, after cooling, pressing, winding and curing, the first lamination film is formed;

[0162] Then the first lamination is placed in the position where the dry composite machine is placed, and polyurethane adhesive (Henkel 3100, the co...

Embodiment 2

[0165] The composite film (180 μm) obtained by bonding polytetrafluoroethylene film (ePTFE) and polyethylene film (PE) is placed in the position where the dry laminating machine is placed, and its surface is coated with polyurethane adhesive (Henkel3100, the coating amount of adhesive for, 3g / m 2 ) and an oxygen indicator (methylene blue, the solvent is glycerin, the mass ratio of methylene blue to glycerin is 1:50), and the coated first permeable membrane is dried in the oven at 10°C for 24h, Then, melt the coated mixed reagent in a heated state, and stick to the porous substrate (starch grafted acrylamide porous substrate, 230 μm) placed in the second place of the dry composite machine, cool, press, After winding and aging, the first laminating film is formed;

[0166] Then the first lamination is placed in the position where the dry composite machine is placed, and polyurethane adhesive (Henkel 3100, the coating amount of the adhesive is 3g / m2) on the porous substrate of t...

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Abstract

The invention relates to the technical field of high-barrier packaging, in particular to a quality guarantee state indicator and a preparation method thereof. The quality guarantee state indicator comprises a first permeable membrane, a composite indication layer, a porous substrate, an adhesive layer, a protective membrane and a pressure-sensitive adhesive layer which are in contact in sequence,the composite indication layer comprises the following components of an adhesive and an indicator, and the indicator comprises one or more of a carbon dioxide indicator, an oxygen indicator and a water vapor indicator; the adhesive in the composite indication layer comprises one or more of a polyester adhesive and a polyurethane adhesive, and the porous substrate is made of expanded polytetrafluoroethylene. The protective film and the pressure-sensitive adhesive layer can be replaced by a second transparent film. When the carbon dioxide, oxygen and water vapor exist in the environment where the quality guarantee state indicator is located, the carbon dioxide, the oxygen and the water vapor can reach the composite indication layer through the first permeable membrane, and the composite indication layer effectively indicates the entering situation of the carbon dioxide, the oxygen and the water vapor through color change.

Description

technical field [0001] The invention relates to the technical field of high-barrier packaging, in particular to a quality assurance indicator and a preparation method thereof. Background technique [0002] In the fields of food, medicine, and precision instruments, high-barrier packaging is required to isolate the entry of gases such as carbon dioxide, oxygen, and water vapor in the environment as much as possible. High-barrier packaging often adopts multi-layer composite high-barrier film solutions, which are generally composed of base resin, barrier resin and adhesive. By combining the advantages of various materials, high-barrier packaging not only has excellent mechanical properties, but also meets Requirements for printing, coloring, heat sealing and bonding; of course, the most important thing is to prevent deterioration, corruption or adverse effects from the environment. However, when the package is subjected to impact, extrusion or other external forces, the high b...

Claims

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Application Information

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IPC IPC(8): G01N21/78
CPCG01N21/78
Inventor 滕超
Owner 六安屹珹新材料科技有限公司
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