WO2016123760A1 - End of service life indicator - Google Patents

End of service life indicator Download PDF

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Publication number
WO2016123760A1
WO2016123760A1 PCT/CN2015/072214 CN2015072214W WO2016123760A1 WO 2016123760 A1 WO2016123760 A1 WO 2016123760A1 CN 2015072214 W CN2015072214 W CN 2015072214W WO 2016123760 A1 WO2016123760 A1 WO 2016123760A1
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Prior art keywords
indicator
color
protective film
service life
indicating material
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PCT/CN2015/072214
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French (fr)
Inventor
Marilyn Wang
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Honeywell International Inc
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Honeywell International Inc
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Publication date
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Priority to CN201580075539.6A priority Critical patent/CN107430106B/en
Priority to PCT/CN2015/072214 priority patent/WO2016123760A1/en
Publication of WO2016123760A1 publication Critical patent/WO2016123760A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/02—Food
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
    • G01N31/22—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators
    • G01N31/229—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators for investigating time/temperature history

Definitions

  • An end of service life indicator including an indicating material that reacts to environmental conditions and changes color responsive to such indicator conditions, a transparent protective film disposed over the indicating material, and a fastening system having an adhesive on a bottom side pf a bottom portion, wherein a top portion the fastening system supports the transparent protective film and has an opening through which the indicating material is visible through the transparent protective film, and wherein the top portion including the transparent protective film is removable to expose the indicating material.
  • a mask including an interior surface, located proximate to a user’s face, a filtering nonwoven fabric material, and an end of service life indicator comprising one or more indicator chemicals attached to the nonwoven fabric material.
  • the end of service life indicator includes an indicating material that reacts to environmental conditions and changes color responsive to such indicator conditions, a transparent protective film disposed over the indicating material, and a fastening system attached to the nonwoven fabric material on a bottom portion, wherein a removable top portion of the fastening system has an opening through which the indicating material is visible through the transparent protective film.
  • a method of manufacturing a product carrier having an end of service life indicator includes forming a two portion releasable fastener in a same shape, adhering a transparent protective film to a first portion of the two portion releasable fastener, placing a color changing end of service life indicating material between the first portion and a second portion of the releasable fastener, and attaching the releasable fastener to the product carrier.
  • FIG. 1 is a block diagram of a mask having an end of service life indicator according to an example embodiment.
  • FIG. 2 is an exploded perspective view of an end of service life indicator having a removable protective cover according to an example embodiment.
  • FIG. 3 is a block diagram of an end of service life indicator with reference indicator according to an example embodiment.
  • FIG. 4 is a block diagram of an alternative end of service life indicator with reference indicator according to an example embodiment.
  • FIG. 5 is a block diagram of an end of service life indicator on food packaging according to an example embodiment.
  • An end of service life indicator includes indicator material chemicals that change color responsive to air quality.
  • the indicator is packaged with a cover to protect the indicator material chemicals from direct contact with acid or other chemicals that might react with the chemicals, such as acid associated with human skin and other carriers of acid.
  • the cover may be transparent to permit viewing of the color of the indicator material prior to use of the device.
  • disposal masks should include an end of service life indicator (ESLI) to warn the end users when it is time to change one.
  • Food packaging should also include an end of service life Indicator (ESLI) to warn the consumer about the food freshness expiration.
  • ESLI end of service life indicator
  • the end of service life indicator as applied to a device is illustrated in block diagram form at 100 in FIG. 1 includes an indicator material 110 which may be any desired shape, from circular to polygonal, and including any arbitrary shape imaginable, such as plants, buildings, landscapes, animals, cartoon characters, and logos to name a few in various embodiments.
  • the indicator material 110 may include a non-woven fabric, such as filter paper, dipped into indicator chemicals in some embodiments.
  • the indicator changes color with exposure to air, such as air breathed out by a wearer of a disposable mask, such as a dust mask 115 having the indicator material affixed within the dust mask such that it is exposed to a wearer’s breath.
  • the indicator material 110 may include color changing indicator chemicals such as one or more of: a pH indicator, litmus, methyl red, methyl orange, bromocresol green, phenol, allochroic silica gel.
  • the color may change from blue to yellow, or from green to yellow depending on the chemistry used for the indicator material. Many different color change times may be obtained and used for many different applications. Typical dust mask times might be 4 to 8 hours.
  • the indicator material 110 may be affixed to an interior side of the dust mask 115 facing the user when properly worn in one embodiment to react with a user’s breath when exhaled.
  • the amount of exhaled breath may be related to the time the mask 115 has been worn by the user, and thereby the time the mask has been used for filtering particles form the air.
  • Carbon dioxide and/or water may be measured by reaction with indicator chemicals, such as pH test materials, which may change color for example, to indicate the end-of-service-life for the mask 115.
  • the determined use life of a disposable mask 115 may be customized based on the specific needs for user, including what particles will be filtered by the mask, the location of the user when wearing the mask, etc.
  • the mask 115 may comprise attaching straps 117 as well as elements 115 for attaching a nose strip 118.
  • a reference endpoint indicator 120 having a color corresponding to an end color of the indicator material 100, which in turn corresponds to an end of service life of the dust mask 115 to which the indicator is attached.
  • the reference endpoint indicator 120 may be located proximate to the indicator to facilitate a visual comparison of the indicator color to the reference color.
  • the reference endpoint indicator 120 may be printed on the dust mask 115, or otherwise formed of suitably colored material affixed to the dust mask 115.
  • the dust mask itself may have a color corresponding to the reference color.
  • the indicator material and reference endpoint indicator may be coupled together and applied as a single unit to the product.
  • the reference endpoint indicator may surround the indicator material in one embodiment making visual comparison easier.
  • the indicator material 110 and reference endpoint indicator 120 may be packaged together as a single component that may be applied to a device, such as by adhesive.
  • the device may be a dust mask as indicated above, or another type of device, such as packaging for perishable food.
  • the chemical indicators may be modified to provide different color change times responsive to air quality, such that the color change time corresponds to a shelf life of the food associated with the package.
  • the package may comprise a skin or other part of the food item itself, such as a banana skin or other fruit skin.
  • FIG. 2 is an exploded perspective view of an end of service life indicator 200.
  • End of service life indicator 200 includes a protective film 210, such as 100 ⁇ m PC film or other plastic film that may be transparent and is shaped to mate with a ring shaped top fastener portion 215 having an outer perimeter 217 that matches an outer perimeter 218 of the protective film, and an inner perimeter 220 corresponding to an opening 222 having a same shape as an indicator material 225.
  • a bottom fastener portion 230 in one embodiment has a ring or annular shape with an outer perimeter 235 that also matches the outer perimeter 218 of the clear protective film 210 and outer perimeter 217 of the top fastener portion 215.
  • An inner perimeter 235 of the bottom fastener portion 230 matches the shape of the indicator material 225.
  • the top fastener portion 215 may be formed of sponge type material with an adhesive portion to adhere to the bottom portion 230, which may also be a sponge material.
  • the thickness of the sponge is 1-3 mm in one embodiment in order to highlight a dimensional visual effect.
  • the bottom sponge portion 230 will be adhered to the mask 115 by a high strength adhesive.
  • a double-side releasable adhesive may be used in order to easily remove the top sponge portion 215 and protective cover 218.
  • the adhesive type can be elastomer adhesive or resin adhesive, except acrylic adhesive which intend to react with the indicator material.
  • the protective film 210 when assembled, is adhered to the top fastener portion 215 via adhesive tape, hot melt adhesive, or other adhesive coating or material, and the top fastener portion 215 is coupled to the bottom fastener portion 230, securing the indicator within the inner perimeter of the top fastener portion 215 and sandwiching the indicator between the protective film 210 and the bottom fastener portion 230.
  • the bottom fastener portion 230 may include an adhesive or adhesive tape bonded on an opposing side suitable for attaching the assembled end of service life indicator 200 to a device such as a product carrier (e.g. nonwoven portion of a dust mask, external food package, etc. )
  • the indicator material may similarly be adhered to the device through the inner perimeter 235 of the bottom fastener portion 230.
  • the fastener portions includes fasteners.
  • the top fastener portion 215 includes hooks and bottom fastener portion 230 may include loops to releasably mate with the hooks.
  • the portions may be reversed, such that the top portion has loops and the opening and adheres to the protective film 210.
  • the perimeters and shapes of the materials comprising the end of service life indicator 200 are shown as annular in shape, the actual shapes may be varied significantly as earlier described.
  • Some potential benefits that may be provided by various embodiments include the visibility of the color change of indicator, due to the use of a transparent protective film. Note that the degree of transparency may be varied from totally transparent to partially transparent. The degree of transparency may be varied to provide a user with the ability to determine the color of the indicator material to ensure that the mask or product still has useful life. In some embodiments, only a portion of the protective cover may be transparent, allowing such a determination.
  • top fastener portion including the protective cover to let the indicator start working, due to the design, sponge design, or other releasably retentive arrangement.
  • the hook or top fastener portion adhesive with protective film will insulate the indicator from the atmosphere, improve the stability of indicator and extend the storage period.
  • the use of the protective cover will aid in helping users avoid touching the indicator 225 by mistake.
  • Use of transparent protective film will allow a user to see whether the device has remaining useful life prior to use.
  • the protective film may be replaced between uses of the device in some embodiments using the fastener portions.
  • Manufacturing of the end of service life indicator may be done by fastening the Velcro hook and loop or sponge portions, coating an adhesive tape and release paper at the back of both sides of the portions, punch them together to a desired shape, adhering the transparent film to the hook portion, adhering the loop portion with the product carrier, and putting the indicator into the Velcro annular and adhesive to the product carrier.
  • An endpoint color material may be adhered or printed nearby for comparison.
  • the indicator material and reference endpoint indicator may be coupled together and applied as a single unit to the product as illustrated in block form at 300 in FIG. 3.
  • the indicator material is indicated at 310, and the reference endpoint indicator is indicated adjacent at 315.
  • One of the fastener portions may be adhered to a substrate 320, and the reference endpoint indicator may be printed on the substrate 320.
  • the reference endpoint indicator may surround the indicator material in one embodiment making visual comparison easier as indicated in block form at 400 in FIG. 4.
  • the indicator material is indicated at 410, and the reference endpoint indicator is indicated at least partially surrounding the indicator material at 415.
  • One of the fastener portions may be adhered to a substrate 420, and the reference endpoint indicator may be printed on the substrate 420, or may itself be a suitably colored substrate to match the endpoint indicator color.
  • FIG. 5 is a block diagram of an end of service life indicator 510 on a device such as food packaging 520 according to an example embodiment.
  • An end of service life indicator comprising:
  • a fastening system having an adhesive on a bottom side pf a bottom portion, wherein a top portion the fastening system supports the transparent protective film and has an opening through which the indicating material is visible through the transparent protective film, and wherein the top portion including the transparent protective film is removable to expose the indicating material.
  • top and bottom portions of the fastening system comprise hook and loop portions.
  • a mask comprising:
  • an end of service life indicator comprising one or more indicator chemicals attached to the nonwoven fabric material, the end of service life indicator comprising:
  • a fastening system attached to the nonwoven fabric material on a bottom portion, wherein a removable top portion of the fastening system has an opening through which the indicating material is visible through the transparent protective film.
  • the mask of example 13 wherein the device to which the indicator is coupled comprises a dust mask.
  • top and bottom portions of the fastening systems comprise a hook portion and a loop portion.
  • a method of manufacturing a product carrier having an end of service life indicator comprising:

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
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  • Food Science & Technology (AREA)
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Abstract

An end of service life indicator including an indicating material that reacts to environmental conditions and changes color responsive to such indicator conditions, a transparent protective film disposed over the indicating material, and a fastening system having an adhesive on a bottom side of a bottom portion, wherein a top portion the fastening system supports the transparent protective film and has an opening through which the indicating material is visible through the transparent protective film, and wherein the top portion including the transparent protective film is removable to expose the indicating material.

Description

End of Service Life Indicator Background
People are willing to pay more and more attention to their health due to the air, water pollution. For example, in smog, people will wear a dust mask to protect themselves from PM2.5 pollution. One of the problems users are facing is to determine when the dust mask service life has ended.
Summary
An end of service life indicator including an indicating material that reacts to environmental conditions and changes color responsive to such indicator conditions, a transparent protective film disposed over the indicating material, and a fastening system having an adhesive on a bottom side pf a bottom portion, wherein a top portion the fastening system supports the transparent protective film and has an opening through which the indicating material is visible through the transparent protective film, and wherein the top portion including the transparent protective film is removable to expose the indicating material.
A mask including an interior surface, located proximate to a user’s face, a filtering nonwoven fabric material, and an end of service life indicator comprising one or more indicator chemicals attached to the nonwoven fabric material. The end of service life indicator includes an indicating material that reacts to environmental conditions and changes color responsive to such indicator conditions, a transparent protective film disposed over the indicating material, and a fastening system attached to the nonwoven fabric material on a bottom portion, wherein a removable top portion of the fastening system has an opening through which the indicating material is visible through the transparent protective film.
A method of manufacturing a product carrier having an end of service life indicator includes forming a two portion releasable fastener in a same shape, adhering a transparent protective film to a first portion of the two portion releasable fastener, placing a color changing end of service life indicating material between the first portion and a second portion of the releasable fastener, and attaching the releasable fastener to the product carrier. 
Brief Description of the Drawings
FIG. 1 is a block diagram of a mask having an end of service life indicator according to an example embodiment.
FIG. 2 is an exploded perspective view of an end of service life indicator having a removable protective cover according to an example embodiment.
FIG. 3 is a block diagram of an end of service life indicator with reference indicator according to an example embodiment.
FIG. 4 is a block diagram of an alternative end of service life indicator with reference indicator according to an example embodiment.
FIG. 5 is a block diagram of an end of service life indicator on food packaging according to an example embodiment.
Detailed Description
In the following description, reference is made to the accompanying drawings that form a part hereof, and in which is shown by way of illustration specific embodiments which may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention, and it is to be understood that other embodiments may be utilized and that structural, logical and electrical changes may be made without departing from the scope of the present invention. The following description of example embodiments is, therefore, not to be taken in a limited sense, and the scope of the present invention is defined by the appended claims.
An end of service life indicator includes indicator material chemicals that change color responsive to air quality. In various embodiments, the indicator is packaged with a cover to protect the indicator material chemicals from direct contact with acid or other chemicals that might react with the chemicals, such as acid associated with human skin and other carriers of acid. The cover may be transparent to permit viewing of the color of the indicator material prior to use of the device.
Ideally, disposal masks should include an end of service life indicator (ESLI) to warn the end users when it is time to change one. Food  packaging should also include an end of service life Indicator (ESLI) to warn the consumer about the food freshness expiration.
The end of service life indicator as applied to a device is illustrated in block diagram form at 100 in FIG. 1 includes an indicator material 110 which may be any desired shape, from circular to polygonal, and including any arbitrary shape imaginable, such as plants, buildings, landscapes, animals, cartoon characters, and logos to name a few in various embodiments. The indicator material 110 may include a non-woven fabric, such as filter paper, dipped into indicator chemicals in some embodiments. The indicator changes color with exposure to air, such as air breathed out by a wearer of a disposable mask, such as a dust mask 115 having the indicator material affixed within the dust mask such that it is exposed to a wearer’s breath.
In various embodiments, the indicator material 110 may include color changing indicator chemicals such as one or more of: a pH indicator, litmus, methyl red, methyl orange, bromocresol green, phenol, allochroic silica gel. In various embodiments, the color may change from blue to yellow, or from green to yellow depending on the chemistry used for the indicator material. Many different color change times may be obtained and used for many different applications. Typical dust mask times might be 4 to 8 hours.
In one embodiment, the indicator material 110 may be affixed to an interior side of the dust mask 115 facing the user when properly worn in one embodiment to react with a user’s breath when exhaled. The amount of exhaled breath may be related to the time the mask 115 has been worn by the user, and thereby the time the mask has been used for filtering particles form the air. Carbon dioxide and/or water may be measured by reaction with indicator chemicals, such as pH test materials, which may change color for example, to indicate the end-of-service-life for the mask 115. In some embodiments, the determined use life of a disposable mask 115 may be customized based on the specific needs for user, including what particles will be filtered by the mask, the location of the user when wearing the mask, etc.
In some embodiments, the mask 115 may comprise attaching straps 117 as well as elements 115 for attaching a nose strip 118.
A reference endpoint indicator 120 having a color corresponding to an end color of the indicator material 100, which in turn corresponds to an end  of service life of the dust mask 115 to which the indicator is attached. The reference endpoint indicator 120 may be located proximate to the indicator to facilitate a visual comparison of the indicator color to the reference color. The reference endpoint indicator 120 may be printed on the dust mask 115, or otherwise formed of suitably colored material affixed to the dust mask 115. In one embodiment, the dust mask itself may have a color corresponding to the reference color. In still further embodiments, the indicator material and reference endpoint indicator may be coupled together and applied as a single unit to the product. The reference endpoint indicator may surround the indicator material in one embodiment making visual comparison easier.
In further embodiments, the indicator material 110 and reference endpoint indicator 120 may be packaged together as a single component that may be applied to a device, such as by adhesive. The device may be a dust mask as indicated above, or another type of device, such as packaging for perishable food. The chemical indicators may be modified to provide different color change times responsive to air quality, such that the color change time corresponds to a shelf life of the food associated with the package. In some embodiments, the package may comprise a skin or other part of the food item itself, such as a banana skin or other fruit skin.
FIG. 2 is an exploded perspective view of an end of service life indicator 200. End of service life indicator 200 includes a protective film 210, such as 100 μm PC film or other plastic film that may be transparent and is shaped to mate with a ring shaped top fastener portion 215 having an outer perimeter 217 that matches an outer perimeter 218 of the protective film, and an inner perimeter 220 corresponding to an opening 222 having a same shape as an indicator material 225. A bottom fastener portion 230 in one embodiment has a ring or annular shape with an outer perimeter 235 that also matches the outer perimeter 218 of the clear protective film 210 and outer perimeter 217 of the top fastener portion 215. An inner perimeter 235 of the bottom fastener portion 230 matches the shape of the indicator material 225.
In one embodiment, the top fastener portion 215 may be formed of sponge type material with an adhesive portion to adhere to the bottom portion 230, which may also be a sponge material. The thickness of the sponge is 1-3 mm in one embodiment in order to highlight a dimensional visual effect. The  bottom sponge portion 230 will be adhered to the mask 115 by a high strength adhesive. Between the top sponge portion 215 and the bottom sponge portion 230, a double-side releasable adhesive may be used in order to easily remove the top sponge portion 215 and protective cover 218. The adhesive type can be elastomer adhesive or resin adhesive, except acrylic adhesive which intend to react with the indicator material.
In one embodiment, when assembled, the protective film 210 is adhered to the top fastener portion 215 via adhesive tape, hot melt adhesive, or other adhesive coating or material, and the top fastener portion 215 is coupled to the bottom fastener portion 230, securing the indicator within the inner perimeter of the top fastener portion 215 and sandwiching the indicator between the protective film 210 and the bottom fastener portion 230. The bottom fastener portion 230 may include an adhesive or adhesive tape bonded on an opposing side suitable for attaching the assembled end of service life indicator 200 to a device such as a product carrier (e.g. nonwoven portion of a dust mask, external food package, etc. ) The indicator material may similarly be adhered to the device through the inner perimeter 235 of the bottom fastener portion 230.
One common material for the fastener portions includes
Figure PCTCN2015072214-appb-000001
fasteners. In some embodiments, the top fastener portion 215 includes hooks and bottom fastener portion 230 may include loops to releasably mate with the hooks. The portions may be reversed, such that the top portion has loops and the opening and adheres to the protective film 210. Also, while the perimeters and shapes of the materials comprising the end of service life indicator 200 are shown as annular in shape, the actual shapes may be varied significantly as earlier described.
Some potential benefits that may be provided by various embodiments include the visibility of the color change of indicator, due to the use of a transparent protective film. Note that the degree of transparency may be varied from totally transparent to partially transparent. The degree of transparency may be varied to provide a user with the ability to determine the color of the indicator material to ensure that the mask or product still has useful life. In some embodiments, only a portion of the protective cover may be transparent, allowing such a determination.
It is also easy to withdraw the top fastener portion, including the protective cover to let the indicator start working, due to the
Figure PCTCN2015072214-appb-000002
design, sponge design, or other releasably retentive arrangement. The hook or top fastener portion adhesive with protective film will insulate the indicator from the atmosphere, improve the stability of indicator and extend the storage period. The use of the protective cover will aid in helping users avoid touching the indicator 225 by mistake. Use of transparent protective film will allow a user to see whether the device has remaining useful life prior to use. The protective film may be replaced between uses of the device in some embodiments using the fastener portions.
Manufacturing of the end of service life indicator may be done by fastening the Velcro hook and loop or sponge portions, coating an adhesive tape and release paper at the back of both sides of the portions, punch them together to a desired shape, adhering the transparent film to the hook portion, adhering the loop portion with the product carrier, and putting the indicator into the Velcro annular and adhesive to the product carrier. An endpoint color material may be adhered or printed nearby for comparison.
In alternative further embodiments, the indicator material and reference endpoint indicator may be coupled together and applied as a single unit to the product as illustrated in block form at 300 in FIG. 3. The indicator material is indicated at 310, and the reference endpoint indicator is indicated adjacent at 315. One of the fastener portions may be adhered to a substrate 320, and the reference endpoint indicator may be printed on the substrate 320.
The reference endpoint indicator may surround the indicator material in one embodiment making visual comparison easier as indicated in block form at 400 in FIG. 4. The indicator material is indicated at 410, and the reference endpoint indicator is indicated at least partially surrounding the indicator material at 415. One of the fastener portions may be adhered to a substrate 420, and the reference endpoint indicator may be printed on the substrate 420, or may itself be a suitably colored substrate to match the endpoint indicator color.
FIG. 5 is a block diagram of an end of service life indicator 510 on a device such as food packaging 520 according to an example embodiment.
Examples
1. An end of service life indicator comprising:
an indicating material that reacts to environmental conditions and changes color responsive to such indicator conditions；
a transparent protective film disposed over the indicating material； and
a fastening system having an adhesive on a bottom side pf a bottom portion, wherein a top portion the fastening system supports the transparent protective film and has an opening through which the indicating material is visible through the transparent protective film, and wherein the top portion including the transparent protective film is removable to expose the indicating material.
2. The indicator of example 1 wherein the indicating material changes color to a color representative of an end of service of a device to which the indicator is coupled.
3. The indicator of example 2 wherein the device to which the indicator is coupled comprises a dust mask.
4. The indicator of example 2 wherein the device to which the indicator is coupled comprises a package containing food.
5. The indicator of any of examples 1-4 and further comprising a reference material having a color corresponding to the changed color of the indicating material.
6. The indicator of any of examples 1-5 wherein the reference material includes an adhesive to couple proximate to the indicator on a device.
7. The indicator of any of examples 1-6 wherein the indicator has a circular shape.
8. The indicator of any of examples 1-6 wherein the indicator has an animal shape, logo shape, cartoon character shape, plant shape, landscape shape or building shape.
9. The indicator of any of examples 1-8 wherein a yellow color of the indicator material corresponds to an end of service life indication of a device to which the indicator is attached.
10. The indicator of example 9 wherein a blue or green color of the indicator material corresponds to useful life of the device remaining.
11. The indicator of any of examples 1-10 wherein the top and bottom portions of the fastening system comprise hook and loop portions.
12. A mask comprising:
an interior surface, located proximate to a user’s face；
a filtering nonwoven fabric material； and
an end of service life indicator comprising one or more indicator chemicals attached to the nonwoven fabric material, the end of service life indicator comprising:
an indicating material that reacts to environmental conditions and changes color responsive to such indicator conditions；
a transparent protective film disposed over the indicating material； and
a fastening system attached to the nonwoven fabric material on a bottom portion, wherein a removable top portion of the fastening system has an opening through which the indicating material is visible through the transparent protective film.
13. The mask of example 12 wherein the indicating material changes color to a color representative of an end of service of a device to which the indicator is coupled.
14. The mask of example 13 wherein the device to which the indicator is coupled comprises a dust mask.
15. The mask of any of examples 13-14 wherein the device to which the indicator is coupled comprises a package containing food.
16. The mask of any of examples 12-14 and further comprising a reference material having a color corresponding to the changed color of the indicating material and an adhesive to couple proximate to the indicator on a device.
17. The mask of any of examples 12-16 wherein the top and bottom portions of the fastening systems comprise a hook portion and a loop portion.
18. The mask of any of examples 12-17 wherein the indicator has a circular shape.
19. The mask of any of examples 12-17 wherein the indicator has an animal shape, logo shape, cartoon character shape, plant shape, landscape shape or building shape.
20. The mask of any of examples 12-19 wherein a yellow color of the indicator material corresponds to an end of service life indication of a device to which the indicator is attached.
21. The mask of example 20 wherein a blue or green color of the indicator material corresponds to useful life of the device remaining.
22. A method of manufacturing a product carrier having an end of service life indicator, the method comprising:
forming a two portion releasable fastener in a same shape；
adhering a transparent protective film to a first portion of the two portion releasable fastener；
placing a color changing end of service life indicating material between the first portion and a second portion of the releasable fastener； and
attaching the releasable fastener to the product carrier.
23. The method of example 22 and further comprising placing an end of service life reference indicator having an endpoint color on the product carrier for reference to the color of the indicating material.
24. The method of any of examples 22-23 wherein the releasable fastener comprises an end of service life reference indicator.
25. The method of any of examples 22-24 wherein releasing the first portion of the releasable fastener also releases the protective film from the end of service life indicator.
Although a few embodiments have been described in detail above, other modifications are possible. For example, the logic flows depicted in the figures do not require the particular order shown, or sequential order, to achieve desirable results. Other steps may be provided, or steps may be eliminated, from the described flows, and other components may be added to, or removed from, the described systems. Other embodiments may be within the scope of the following claims.

Claims (10)

  1. An end of service life indicator comprising:
    an indicating material that reacts to environmental conditions and changes color responsive to such indicator conditions；
    a transparent protective film disposed over the indicating material； and
    a fastening system having an adhesive on a bottom side pf a bottom portion, wherein a top portion the fastening system supports the transparent protective film and has an opening through which the indicating material is visible through the transparent protective film, and wherein the top portion including the transparent protective film is removable to expose the indicating material.
  2. The indicator of claim 1 wherein the indicating material changes color to a color representative of an end of service of a device to which the indicator is coupled.
  3. The indicator of claim 2 wherein the device to which the indicator is coupled comprises a dust mask.
  4. The indicator of claim 2 wherein the device to which the indicator is coupled comprises a package containing food.
  5. The indicator of any one of claims 1-4 and further comprising a reference material having a color corresponding to the changed color of the indicating material.
  6. The indicator of any one of claims 1-4 wherein the reference material includes an adhesive to couple proximate to the indicator on a device.
  7. The indicator of any one of claims 1-4 wherein a yellow color of the indicator material corresponds to an end of service life indication of a device to which the indicator is attached.
  8. A mask comprising:
    an interior surface, located proximate to a user’s face；
    a filtering nonwoven fabric material； and
    an end of service life indicator comprising one or more indicator chemicals attached to the nonwoven fabric material, the end of service life indicator comprising:
    an indicating material that reacts to environmental conditions and changes color responsive to such indicator conditions；
    a transparent protective film disposed over the indicating material； and
    a fastening system attached to the nonwoven fabric material on a bottom portion, wherein a removable top portion of the fastening system has an opening through which the indicating material is visible through the transparent protective film.
  9. The mask of claim 12 wherein the indicating material changes color to a color representative of an end of service of a device to which the indicator is coupled, and wherein the mask further comprises a reference material having a color corresponding to the changed color of the indicating material and an adhesive to couple proximate to the indicator on a device.
  10. A method of manufacturing a product carrier having an end of service life indicator, the method comprising:
    forming a two portion releasable fastener in a same shape；
    adhering a transparent protective film to a first portion of the two portion releasable fastener；
    placing a color changing end of service life indicating material between the first portion and a second portion of the releasable fastener； and
    attaching the releasable fastener to the product carrier.
PCT/CN2015/072214 2015-02-04 2015-02-04 End of service life indicator Ceased WO2016123760A1 (en)

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