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A kind of film-coated chemical detection test paper and preparation method thereof

A technology for testing test strips and chemistry. It is applied in the direction of material analysis and papermaking by making materials undergo chemical reactions, and by observing the impact on chemical indicators. It can solve problems such as failure, shortened shelf life, and inaccurate test results. To achieve the effect of stable properties and protective reagents

Inactive Publication Date: 2017-11-10
KUNMING BOYIN SCIANDTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the shelf life of dry chemical test paper is greatly shortened after opening, because the dry chemical test paper head is in contact with the air after opening, causing chemical reactions on the test paper head, resulting in inaccurate or even invalid test results

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Weigh 10g of vinyl acetate and add it to the container, then add 70g of polyvinyl alcohol. During the process of adding polyvinyl alcohol, heat and stir properly to make the whole system uniform. Finally, add 20g of polypropylene glycol, stir, and mix well to form a protective solution. The protection liquid is evenly applied on the chemical detection test paper with a thickness of about 0.5mm. The protection liquid is applied on the dry chemical detection test paper and then dried. After drying, a transparent protective film is formed on the chemical detection test paper.

[0014] The protective solution prepared by polyvinyl alcohol, polypropylene glycol, and vinyl acetate has a certain viscosity and is water-soluble. The protective film formed by drying the protective solution has an oxygen permeability of less than 1cm3 / (m 2 ·24h·0.1MPa), almost close to the performance of aluminum foil. The protective film makes the chemical detection test paper still have a layer...

Embodiment 2

[0016] Weigh 10g of vinyl acetate and add it to the container, then add 80g of polyvinyl alcohol. During the process of adding polyvinyl alcohol, heat and stir properly to make the whole system uniform. Finally, add 10g of polypropylene glycol, stir, and mix well to form a protective solution. The protection liquid is evenly applied on the chemical detection test paper, and the thickness of the application is about 0.6mm. The protection liquid is applied on the dry chemical detection test paper and then dried. After drying, a layer of transparent protective film is formed on the chemical detection test paper.

Embodiment 3

[0018] Weigh 10g of vinyl acetate and add it to the container, then add 60g of polyvinyl alcohol. During the process of adding polyvinyl alcohol, heat and stir properly to make the whole system uniform. Finally, add 30g of polypropylene glycol, stir, and mix well to form a protective solution. The protection liquid is evenly applied on the chemical detection test paper with a thickness of about 0.3mm. The protection liquid is applied on the dry chemical detection test paper and then dried. After drying, a transparent protective film is formed on the chemical detection test paper.

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PUM

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Abstract

The invention belongs to the technical field of chemical test paper, and relates to chemical test paper covered with a film and a preparation method of the chemical test paper. The method comprises the following steps: preparing polyvinyl alcohol, polyethylene glycol and vinyl acetate proportionally, and mixing the polyvinyl alcohol, the polyethylene glycol and the vinyl acetate evenly to form a protection liquid; and evenly painting the protection liquid on the chemical test paper, and airing the protection liquid, so as to form a layer of transparent protection film on the chemical test paper. The protection film is formed on the surface of the chemical test paper under the condition that use of the chemical test paper is not affected so as to prevent reaction and deterioration in a storage process.

Description

technical field [0001] The invention belongs to the technical field of detection test paper, and relates to a film-coated chemical detection test paper and a preparation method thereof. Background technique [0002] At present, the shelf life of dry chemical test paper is greatly shortened after opening, because the dry chemical test paper head is in contact with the air after opening, causing chemical reactions on the chemical substances on the test paper head, resulting in inaccurate or even invalid test results. Contents of the invention [0003] In view of the above phenomenon, the present invention provides a film-coated chemical detection test paper and a preparation method thereof, which prevents reaction deterioration during storage by forming a protective film on the surface of the chemical detection test paper without affecting the use of the chemical detection test paper. [0004] The present invention is achieved like this. A film-coated chemical detection tes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H19/14G01N21/78
CPCD21H19/14G01N21/78
Inventor 汪生云邓成平王艳蒋福美余廷松
Owner KUNMING BOYIN SCIANDTECH CO LTD