CN101393134A - Humidity indicators - Google Patents
Humidity indicators Download PDFInfo
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- CN101393134A CN101393134A CNA2008102185825A CN200810218582A CN101393134A CN 101393134 A CN101393134 A CN 101393134A CN A2008102185825 A CNA2008102185825 A CN A2008102185825A CN 200810218582 A CN200810218582 A CN 200810218582A CN 101393134 A CN101393134 A CN 101393134A
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- humidity indicator
- humidity
- indicator
- green
- salt
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Abstract
The invention provides a humidity indicator which does not contain cobalt chloride. The humidity indicator comprises a vector. A solvent for the vector is water, and the main compositions by mass percentage of the vector in the solution are 10 to 30 percent of bluestone or blue vitriol and 0.5 to 12 percent of bromine salt; and the solution is used for discoloration. The indicator has wide indicating range (can indicate 5 to 80 percent of the ambient humidity) and high sensitivity. The indicator is brown before absorbing the humidity and is converted into cyan after absorbing the humidity, so that the indicator has obvious discoloration effect and high sensitivity.
Description
Technical field
The present invention relates to a kind of indicator that is used to show humidity, be specifically related to not contain the humidity indicator of cobalt.
Background technology
In the market humidity indication material, for example humidity indicating card, discolour silica gel etc. are how with the cobalt chloride agent of giving instruction.And cobalt chloride has been defined as two class carcinogenic substances in 1998 in by the modification XXV of European Union at European Directive 67/548, has been under an embargo the America and Europe and produces and progressively eliminate so contain the humidity indication material of cobalt chloride.For seeking one or more can substitute cobalt chloride on function component, the researcher is always in unremitting effort.Wherein, disclosed CN1365447A patented claim on August 21st, 2002 discloses a kind of " humidity indicator of drying agent receptivity ".This technology is not used cobalt chloride, and adopts cupric chloride as active component and have the synergy salt of chloride ion-containing, and both are jointly as just playing discoloration preferably.But, cupric chloride easily and chlorion be combined into [CuCl
4]
2+, and [CuCl
4]
2+Corresponding solvent is yellow, and after the indicator moisture absorption, it can follow the configuration of the blue medium generation color of indicator formation, thereby causes the indicator after the moisture absorption to show as green.The change color of the green of this yellow during by drying after the moisture absorption is also not obvious, thereby has influenced the indicator sensitivity level, and particularly under the less environment of humidity, this situation is especially obvious.
Summary of the invention
For overcoming the defective that exists in the prior art, the invention provides a kind of humidity indicator, it does not contain cobalt chloride, and the change color scope is bigger, more can adapt to the needs of market and environmental protection.
Humidity indicator provided by the invention comprises carrier, and this carrier solvent is that water, key component and the massfraction in solution thereof are: copper sulphate or Salzburg vitriol 10%～30%; The solution of bromine salt 0.5%～12% comes variable color.Wherein, bromine salt is preferably sodium bromide or magnesium bromide.Both can adjust the ratio in solution, to be mixed with the humidity indicator that can indicate varying environment humidity.
In another embodiment of the present invention, humidity indicator also contains nickel salt, as nickel chloride, and nickelous sulfate, nickel nitrate etc.In other embodiments, humidity indicator of the present invention also contains pigment, and for example, gardenia blue, cape jasmine are green, chlorophyll mantoquita or methyl green etc.
Used carrier is fiber-like product, silica gel, molecular sieve, aluminium oxide or bentonitic clay.
No cobalt humidity indicator solution provided by the invention, dry back gained humidity indicator indicating range wide (can indicate 5～80% ambient humidity), sensitivity is higher.Be brown before the moisture absorption, become blue-green after the moisture absorption, color changeable effect is obvious, and is highly sensitive.
Embodiment
The combination of using copper sulphate and bromine salt is as humidity indicator key component of the present invention.Component shown in the according to the form below 1 and content preparation humidity indicator.
Table 1: copper sulphate+bromine salt is as the humidity indicator of key component
| Numbering | Water | Copper sulphate | Bromine salt and weight thereof | Color when dry | Color after the moisture absorption | Indication humidity |
| A | 89g | 10g | NaBr 1g | Brown | Light blue | 10％ |
| B | 76.5g | 20g | NaBr 3.5g | Brown | Blue-green | 40％ |
| C | 64.5g | 30g | NaBr 5.5g | Dark-brown | Blue-green | 50％ |
| D | 62.5g | 30g | NaBr 7.5g | Dark-brown | Blue-green | 60％ |
In last table, along with the increase of the content of copper sulphate and bromine salt, the humidity indicator color when dry deepens gradually, but the color after the moisture absorption still keeps blue-green, and the ambient humidity that can indicate becomes big along with the increase of the concentration of key component.Even at the concentration of key component humidity indicator A hour, its color changeable effect is still obvious, easily identification.
The combination of using Salzburg vitriol and bromine salt is as humidity indicator key component of the present invention.Component shown in the according to the form below 2 and content preparation humidity indicator.
Table 2: Salzburg vitriol+bromine salt is as the humidity indicator of key component
| Numbering | Water | Salzburg vitriol | Bromine salt and weight thereof | Color when dry | Color after the moisture absorption | Indication humidity |
| E | 80g | 19.5g | NaBr 0.5g | Light brown | Light blue | 5％ |
| F | 77.5g | 20g | KBr 2.5g | Brown | Light blue | 10％ |
| G | 70g | 25g | NaBr 5g | Brown | Blue-green | 40％ |
| H | 62.5g | 30g | MgBr 2 7.5g | Dark-brown | Blue-green | 50％ |
| I | 60g | 30g | NaBr 10g | Dark-brown | Blue-green | 60％ |
| J | 58 | 30 | NaBr 12g | Dark-brown | Blue-green | 80％ |
In last table, the similar effect when using Salzburg vitriol to replace copper sulphate to have to use copper sulphate.
In other embodiments of the present invention, can also in humidity indicator, add nickel salt and/or pigment, described nickel salt is nickel chloride for example, and for example gardenia blue, cape jasmine are green for nickelous sulfate, nickel nitrate etc., described pigment, chlorophyll mantoquita or methyl green.
In one embodiment, in above-mentioned humidity indicator A, add the nickelous sulfate of 1～5g/100g and the gardenia blue of 0.001～0.003g/100g.Be bright and beautiful dark brown yellow when the result shows drying, become bright and beautiful blue-green after the moisture absorption.
Use the combination of copper sulphate and bromine salt, and add nickel salt and/or pigment, as humidity indicator key component of the present invention.Component shown in the according to the form below 3 and content preparation humidity indicator.
Table 3: copper sulphate+bromine salt+nickel salt+pigment is as the humidity indicator of key component
| Numbering | Water | Copper sulphate | Bromine salt and weight thereof | Nickel salt and weight thereof | Pigment and weight thereof | Color when dry | Color after the moisture absorption | Indication humidity |
| K | 88.5g | 10g | NaBr 1g | Nickelous sulfate 0.5g | Gardenia blue 0.003g | Light brown | Pale bluish green | 10％ |
| L | 87.5 | 10g | NaBr 1.5g | Nickelous sulfate 1.0g | Gardenia blue 0.003g | Light brown | Pale bluish green | 20％ |
| M | 76 | 20g | NaBr 2.5g | Nickelous sulfate 1.5g | Gardenia blue 0.003g | Pale brown look | Blue-green | 30％ |
| N | 74.5g | 20g | NaBr 3.5g | Nickelous sulfate 2.0g | Gardenia blue 0.003g | Pale brown look | Blue-green | 40％ |
| O | 63.0g | 30g | NaBr 5.5g | Nickelous sulfate 2.5g | Gardenia blue 0.003g | Dark brown yellow | Blue-green | 50％ |
| P | 59.5g | 30g | NaBr 7.5g | Nickelous sulfate 3.0g | Gardenia blue 0.003g | Dark brown yellow | Blue-green | 60％ |
In last table, use the combination of copper sulphate and bromine salt, and add nickel salt and/or pigment, as humidity indicator key component of the present invention, the variable color situation is better than the single combination of copper sulphate and bromine salt, and color is more bright and beautiful before and after the indicator discoloration.
With the humidity indicator impregnate paper for preparing, nonwoven fabrics or other fiber-like products, can make card after the oven dry with humidity indicating function, we are referred to as humidity indicating card; The also available humidity indicator dipping silica gel for preparing, acquisition has the discolour silica gel of humidity indicating function equally.Carrier well known to those skilled in the art can also be molecular sieve, aluminium oxide, bentonitic clay etc.
What more than provide only is preferred implementation of the present invention; those skilled in the art is after reading content of the present invention; be easy to the present invention is modified and is no more than the scope of protection of present invention, the applicant comprises these conspicuous modifications within the scope of the invention intentionally.
Claims (10)
1. humidity indicator comprises carrier, and this carrier solvent is that water, key component and the massfraction in solution thereof are: copper sulphate or Salzburg vitriol 10%～30%; The solution of bromine salt 0.5%～12% comes variable color.
2. humidity indicator as claimed in claim 1 is characterized in that, described bromine salt is sodium bromide or magnesium bromide.
3. humidity indicator as claimed in claim 2 is characterized in that, described bromine salt is sodium bromide.
4. humidity indicator as claimed in claim 1 is characterized in that described humidity indicator also contains nickel salt.
5. humidity indicator as claimed in claim 4 is characterized in that described nickel salt is selected from nickel chloride, nickelous sulfate and nickel nitrate.
6. humidity indicator as claimed in claim 1 is characterized in that described humidity indicator also contains pigment.
7. humidity indicator as claimed in claim 6 is characterized in that, described pigment is that gardenia blue, cape jasmine are green, chlorophyll mantoquita or methyl green.
8. humidity indicator as claimed in claim 1 is characterized in that, described carrier is nonwoven fabrics or paper.
9. humidity indicator as claimed in claim 1 is characterized in that, described carrier is a silica gel.
10. humidity indicator as claimed in claim 1 is characterized in that, described carrier is molecular sieve, aluminium oxide or bentonitic clay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102185825A CN101393134A (en) | 2008-10-23 | 2008-10-23 | Humidity indicators |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102185825A CN101393134A (en) | 2008-10-23 | 2008-10-23 | Humidity indicators |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101393134A true CN101393134A (en) | 2009-03-25 |
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ID=40493535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008102185825A Pending CN101393134A (en) | 2008-10-23 | 2008-10-23 | Humidity indicators |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100252779A1 (en) * | 2009-04-06 | 2010-10-07 | Multisorb Technologies, Inc. | Copper bromide humidity indicating card |
| CN102539429A (en) * | 2010-12-31 | 2012-07-04 | 财团法人工业技术研究院 | Temperature indication card and manufacture method thereof |
| CN103091321A (en) * | 2012-12-25 | 2013-05-08 | 山东辛化硅胶有限公司 | Cobaltless blue color-changing indicator and production method thereof |
| CN105784703A (en) * | 2014-12-24 | 2016-07-20 | 中国科学院大连化学物理研究所 | Insoluble nano humidity indicating material, preparation and application thereof |
| CN106004158A (en) * | 2016-06-30 | 2016-10-12 | 李宝 | Dampproof portfolio |
| CN107315006A (en) * | 2016-09-13 | 2017-11-03 | 上海衡元高分子材料有限公司 | A kind of humidity indicating card |
-
2008
- 2008-10-23 CN CNA2008102185825A patent/CN101393134A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100252779A1 (en) * | 2009-04-06 | 2010-10-07 | Multisorb Technologies, Inc. | Copper bromide humidity indicating card |
| WO2010117865A2 (en) | 2009-04-06 | 2010-10-14 | Multisorb Technologies, Inc. | Copper bromide humidity indicating card |
| EP2417439A2 (en) * | 2009-04-06 | 2012-02-15 | Multisorb Technologies, Inc. | Copper bromide humidity indicating card |
| CN102803937A (en) * | 2009-04-06 | 2012-11-28 | 多种吸附技术公司 | Copper bromide humidity indicating card |
| AU2010234760B2 (en) * | 2009-04-06 | 2014-01-23 | Multisorb Technologies, Inc. | Copper bromide humidity indicating card |
| EP2417439A4 (en) * | 2009-04-06 | 2014-12-31 | Multisorb Tech Inc | Copper bromide humidity indicating card |
| CN102803937B (en) * | 2009-04-06 | 2016-06-29 | 多种吸附技术公司 | copper bromide humidity indicating card |
| CN102539429A (en) * | 2010-12-31 | 2012-07-04 | 财团法人工业技术研究院 | Temperature indication card and manufacture method thereof |
| CN103091321A (en) * | 2012-12-25 | 2013-05-08 | 山东辛化硅胶有限公司 | Cobaltless blue color-changing indicator and production method thereof |
| CN105784703A (en) * | 2014-12-24 | 2016-07-20 | 中国科学院大连化学物理研究所 | Insoluble nano humidity indicating material, preparation and application thereof |
| CN106004158A (en) * | 2016-06-30 | 2016-10-12 | 李宝 | Dampproof portfolio |
| CN107315006A (en) * | 2016-09-13 | 2017-11-03 | 上海衡元高分子材料有限公司 | A kind of humidity indicating card |
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Open date: 20090325 |