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Ink composition for sensing carbon dioxide gas, carbon dioxide indicator using the same, package provided with the carbon dioxide indicator, and method for sensing pinhole using the same

a carbon dioxide gas and indicator technology, applied in the direction of analysis using chemical indicators, packaging goods types, transportation and packaging, etc., can solve the problems of no means of finding pinholes, poor seal, and inability to check whether the contents are reliably stored in the ambient gas exchange packaging environment, so as to facilitate the checking of changes in the carbon dioxide atmosphere

Inactive Publication Date: 2010-09-09
TOPPAN PRINTING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010]The present invention has been made in consideration of the above situation, and has as its first object to provide an ink composition for sensing carbon dioxide gas, which is used to form a carbon dioxide indicating portion capable of easily checking changes in a carbon dioxide atmosphere caused by a pinhole or poor seal of a carbon-dioxide-ambient package.
[0011]It is the second object of the present invention to provide a carbon dioxide indicator capable of easily checking changes in a gas ambient caused by a pinhole or poor seal of a carbon-dioxide-ambient package.
[0012]It is the third object of the present invention to provide a carbon-dioxide-ambient package for storing contents such as foods, drinks, or chemicals, in which changes in a gas ambient caused by a pinhole or poor seal can be easily checked.

Problems solved by technology

However, if a pinhole forms or poor seal occurs owing to a defect of the packaging material itself, to a charging failure of the contents, or to a shock during the course of transportation such as distribution, the ambient in the exchange gas packaging would changes, and this may cause the contents to become rotten or change in quality.
As described above, even when gas exchange packaging is performed using a packaging material having superior gas barrier properties, no means can find pinholes and poor seal.
Therefore, it is impossible to check whether the contents are reliably stored in the gas exchange packaging ambient.
However, this carbon dioxide indicator cannot be stable for long time periods.
Unfortunately, the formation of the indicator portion of this monitor is too time-consuming to use the monitor for a packaged product.

Method used

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  • Ink composition for sensing carbon dioxide gas, carbon dioxide indicator using the same, package provided with the carbon dioxide indicator, and method for sensing pinhole using the same
  • Ink composition for sensing carbon dioxide gas, carbon dioxide indicator using the same, package provided with the carbon dioxide indicator, and method for sensing pinhole using the same
  • Ink composition for sensing carbon dioxide gas, carbon dioxide indicator using the same, package provided with the carbon dioxide indicator, and method for sensing pinhole using the same

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0141]An ink composition was obtained by finely dispersing ink composition 1, having the following composition, for sensing carbon dioxide gas by using a paint conditioner or the like.

Ink Composition 1 for Sensing Carbon Dioxide Gas

[0142]

Metacresol purple0.1gSodium carbonate1.5gPolyvinylacetal resin17.5gFine-crystal cellulose11gWater70g

[0143]As a support, JIS standard P 3801 chemical analytical filter paper weighing 140 g / m2 was used. This filter paper was coated with ink composition 1 by screen printing, and the resultant structure was dried at 70° C. for 1 hr to obtain an indicator.

[0144]Bags having an internal volume of 50 ml were formed using a gas barrier laminated film composed of a vinylidene chloride-coated nylon film (thickness 25 μm) / low-density polyethylene film (thickness 50 μm). The above-mentioned indicator and a gas mixture of nitrogen gas and carbon dioxide gas were sealed while the concentration of the carbon dioxide gas was variously changed, and their color change...

example 2

[0145]Test packages were formed following the same procedure as in Example 1 except that ink composition 1 for sensing carbon dioxide gas in Example 1 was changed to ink composition 2 for sensing carbon dioxide gas and a 12-μm thick polyester film was used as a support, and their color changes were observed. The obtained results are shown in Table 3 below.

Ink Composition 2 for Sensing Carbon Dioxide Gas

[0146]

Metacresol purple0.1gSodium hydroxide1.0gPolyvinylacetal resin17.5gFine-crystal cellulose11gWater70g

example 3

[0147]Test packages were formed following the same procedure as in Example 1 except that ink composition 1 for sensing carbon dioxide gas in Example 1 was changed to ink composition 3 for sensing carbon dioxide gas, and their color changes were observed. The obtained results are shown in Table 3 below.

Ink Composition 3 for Sensing Carbon Dioxide Gas

[0148]

Metacresol purple0.1gSodium carbonate1.5gPolyvinylacetal resin17.5gWater78.8g

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Abstract

An ink composition for sensing carbon dioxide gas contains a pH indicator formed using a combination of two or more types of pH indicator components, binder, and solvent and allows easy visual observation of color changes of an indicating portion caused by the concentration of carbon dioxide gas. When the ink composition is applied to a carbon dioxide indicator and package, a pinhole and poor seal of a carbon-dioxide-ambient package are easily found.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation of U.S. patent application Ser. No. 10 / 170,654, filed Jun. 14, 2002, now pending, which is a continuation-in-part application of and claiming the benefit of priority under 35 USC §120 to U.S. patent application Ser. No. 10 / 151,885, filed May 22, 2002, now abandoned, the entire contents of which are incorporated herein by reference. U.S. patent application Ser. No. 10 / 151,885 was a continuing 1110 application, filed under 35 U.S.C. §111(a), of international application PCT / JP00 / 08692, filed Dec. 8, 2000, for which foreign priority benefit was based on Japanese patent application 11-355915, filed Dec. 15, 1999.[0002]This application is based upon and claims the benefit of priority under 35 USC §119 and / or 365 from the prior Japanese patent applications No. 11-355915, filed Dec. 15, 1999; No. 2001-180243, filed Jun. 14, 2001; and No. 2001-180244, filed Jun. 14, 2001, the entire contents of which are incorpo...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B65D85/00G01N31/22
CPCY10T436/204998G01N31/223
Inventor YUYAMA, KOHEIOKA, MINORUHONDA, HIROSHIHAMAZAKI, SHINOCHIAI, SHINYAOBINATA, NOEMIZUMA, HIROYUKI
Owner TOPPAN PRINTING CO LTD
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