CN107436303B - Time lapse indicating device - Google Patents
Time lapse indicating device Download PDFInfo
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- CN107436303B CN107436303B CN201710557542.2A CN201710557542A CN107436303B CN 107436303 B CN107436303 B CN 107436303B CN 201710557542 A CN201710557542 A CN 201710557542A CN 107436303 B CN107436303 B CN 107436303B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N2021/775—Indicator and selective membrane
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N2021/7756—Sensor type
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Abstract
The present invention relates to a time lapse indicating device. A time lapse indicating device, comprising: a base layer; an indicating layer laminated on a surface of the base layer, the indicating layer including an indicating portion which changes color depending on a contact time with air, the indicating portion containing a color-changing dye; the base material layer is made of transparent materials, the base material layer is hermetically connected with at least one of the base layer and the indicating layer to form an accommodating body capable of blocking gas, and the indicating part is accommodated in a closed space of the accommodating body; and a shielding member for shielding the indication part of the indication layer. The above-mentioned time lapse indicating means is strong against light.
Description
Technical Field
The present invention relates to a time lapse indicating device.
Background
The general products have a service life or a shelf life, and particularly, perishable products such as food, beverage and medicine are easy to go bad during storage, in order to reduce oxygen in the package and avoid deterioration in an oxygen environment, vacuum packaging or modified atmosphere packaging is usually adopted, and the outgoing date and the shelf life are printed on an outer package for people to judge whether the products are overdue or not. However, if the product package is opened or used, it is important to effectively record the opening or use time.
A conventional time lapse indicating device for indicating time includes a base layer, an indicating layer formed on a surface of the base layer, and a base material layer, and the base material layer and the base layer form a housing body for housing the indicating layer. When in use, the accommodating body is communicated with the external space to change the color of the indicating layer.
However, the existing indicating layer generally adopts a reactive dye as an indicating dye, and the reactive dye has the problem of poor light resistance and is easy to be decomposed by light under sunlight or lamplight for a long time so as to cause the failure of the indicating device when time passes.
Disclosure of Invention
In view of this, there is a need for a time lapse indicating device that is resistant to light.
A time lapse indicating device comprising:
a base layer;
an indicating layer laminated on a surface of the base layer, the indicating layer including an indicating portion containing a color-changing dye, the indicating portion being changeable in color depending on a contact time with air;
the base material layer is made of transparent materials, the base material layer is hermetically connected with at least one of the base layer and the indicating layer to form an accommodating body capable of blocking gas, and the indicating part is accommodated in a closed space of the accommodating body; and
and the shielding piece can shield the indicating part of the indicating layer.
According to the time lapse indicating device, the shielding piece capable of shielding the indicating part of the indicating layer is arranged, so that the failure caused by the fact that the indicating pigment of the indicating part is easy to generate light decomposition after being irradiated under sunlight or lamplight for a long time can be effectively avoided, and the time lapse indicating device is high in light resistance.
In one embodiment, the indicator is a carbon dioxide sensitive indicator, an oxygen sensitive indicator, an acid sensitive indicator, or a base sensitive indicator.
In one embodiment, the shielding member is laminated on the surface of the substrate layer.
In one embodiment, the shield is variably transparent upon heating; and/or the covering may become transparent when exposed to water or moisture.
In one embodiment, the shielding piece is laminated on the surface of the substrate layer, and the shielding piece part is fixedly connected with the surface of one side of the substrate layer away from the base layer, so that the shielding piece can be opened at a preset angle relative to the substrate layer.
In one embodiment, the shielding member comprises a connecting layer partially fixed with the substrate layer and a shielding layer formed on the surface of the connecting layer, and the shielding layer can shield the indicating part of the indicating layer.
In one embodiment, the shielding piece is connected with the edge of the substrate layer and can be bent relative to the substrate layer to shield the indication part.
In one embodiment, the joint of the shielding piece and the substrate layer is provided with an indentation.
In one embodiment, the base layer and at least one of the base layer and the indicator layer are bonded to form the housing body by a bonding layer, the bonding layer includes a first bonding portion and a second bonding portion, and the viscosity of the second bonding portion is lower than that of the first bonding portion.
In one embodiment, the device further comprises an actuating member, the actuating member is connected with the edge of the substrate layer, and the actuating member can drive the substrate layer to move in the direction away from the base layer, so that the edge of the substrate layer and the edge of the base layer are opened to form a gap.
Drawings
FIG. 1 is a schematic diagram of the construction of an embodiment of a time lapse indicating device;
FIG. 2 is a schematic view of another angle of the time lapse indicating apparatus of FIG. 1;
FIG. 3 is a schematic view of the time lapse indicating device of FIG. 1 in another state;
FIG. 4 is a schematic view of the time lapse indicating device of FIG. 2 in another state;
FIG. 5 is a schematic diagram of another embodiment of a time lapse indicating device;
FIG. 6 is a schematic view of the time lapse indicating device of FIG. 5 in another state;
FIG. 7 is a schematic diagram of another embodiment of a time lapse indicating device;
FIG. 8 is a schematic view of the time lapse indicating device of FIG. 7 in another state;
FIG. 9 is a schematic view of the time lapse indicating device of FIG. 7 in another state;
FIG. 10 is a schematic view of another angle of the time lapse indicating device of FIG. 7;
FIG. 11 is a schematic view of the time lapse indicating device of FIG. 10 in another state;
FIG. 12 is a schematic view of the time lapse indicating device of FIG. 10 in another state;
FIG. 13 is a schematic view of another embodiment of a time lapse indicating device;
FIG. 14 is a schematic structural view of the time lapse indicating device of FIG. 13 in another state;
FIG. 15 is a schematic view of the time lapse indicating device of FIG. 13 in another state.
Detailed Description
The time lapse indicating device will be described in further detail below with reference to specific embodiments.
Referring to fig. 1, a time lapse indicating device 100 for indicating time according to an embodiment includes a base layer 110, an indicating layer 120, a base layer 130, an adhesive layer 140, an adhesive layer 150, a release layer 160, and a shield 170.
The substrate layer 110 is used to carry the indicator layer 120. The base layer 110 has good gas tightness and can prevent gas from penetrating through the base layer 110. The base layer 110 is made of Polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), or a composite material having a surface compounded with the above materials. In one embodiment, the substrate layer 110 is provided as a non-transparent material by printing or compounding an opaque material. Of course, the material of the base layer 110 is not limited to the above-described material, and any material that is air-tight may be used as the material of the base layer 110.
The indicating layer 120 is formed on one surface of the base layer 110. In the illustrated embodiment, the indicator layer 120 includes an indicator portion 121 and a reference portion 123, and the indicator portion 121 is located at the center of the reference portion 123. The indicator 121 is formed by printing an indicator ink. The thickness of the indicator 121 is 0.01mm to 1 mm.
In one embodiment, indicator 121 is a carbon dioxide sensitive indicator.
The indicating ink comprises the following components in parts by mass:
0.1 to 5 parts of color-changing dye;
1-10 parts of alkali;
40 to 70 parts of solvent; and
30-50 parts of a binder.
In this embodiment, the color-changing dye is sensitive to pH changes, and as the pH of the indicating composition changes, the color of the pH indicator changes. The color-changing dye is at least one selected from cresol purple, m-cresol purple, bromocresol purple, thymolphthalein, o-cresol phthalein, bromothymol blue, thymol blue, bromophenol blue, cresol red, methyl orange, methyl yellow, methyl red, hexadecyl trimethyl ammonium cation, neutral red, phenol red, rhodamine, sulforhodamine 101, anthocyanin, alizarin, gentian purple and bromocresol green. It should be understood that other pH sensitive materials may also be used as the color-changing dye.
The base may absorb carbon dioxide from the air, thereby changing the pH of the indicator portion 121 and thus changing the color of the indicator portion 121. The alkali is at least one selected from sodium hydroxide, potassium hydroxide, magnesium hydroxide, calcium hydroxide, lithium hydroxide, quaternary ammonium salt, barium hydroxide and sodium bicarbonate. Of course, it is understood that the base is not limited to the above listed materials, and other bases that can absorb and react with carbon dioxide are possible.
The adhesive increases the viscosity and the adhesive force of the indicating ink so that the indicating ink meets the printability requirement. The binder is at least one selected from polyvinyl butyral, hydroxymethyl cellulose and hydroxypropyl cellulose. It is understood that the binder is not limited to the above-listed materials, and other binders that can increase the viscosity and adhesion of the indicating ink and have a neutral pH are possible.
The solvent is at least one selected from water, ethanol, methanol, n-propanol, isopropanol, acetone and ethyl acetate. It is to be understood that the solvent is not limited to the above-mentioned materials, and other solvents having a neutral pH value and capable of dissolving the binder, the alkali and the color-changing dye may be used.
In one embodiment, the indicator ink further comprises 0.1 to 2 parts of an ultraviolet absorber. The ultraviolet absorber is at least one selected from hydroxyphenyl benzotriazole, benzophenone, benzoxazone, alpha-cyanoacrylate, oxanilide, triaryl-s-triazine, formamidine, cinnamate, malonate, benzylidene, salicylate, and benzoate UVA.
The indicating portion 121 is formed by printing the indicating ink, and the indicating portion 121 includes 0.1 to 5 parts of a color-changing dye, 1 to 10 parts of an alkali, and 30 to 50 parts of a binder.
In one embodiment, indicator 121 is an oxygen sensitive indicator.
The indicating ink comprises the following components in parts by mass:
0.1 to 5 parts of color-changing dye;
1-5 parts of a reducing agent;
40 to 70 parts of solvent; and
30-50 parts of a binder.
The color-changing dye is oxygen-sensitive, has two forms of an oxidation state and a reduction state, respectively corresponds to two different colors, can be reduced by a reducing agent, is in the reduction state after being reduced, can be subjected to redox reaction with oxygen, and has color change in the reaction process. The color-changing dye is at least one of thiazine dye, oxazine dye, azine dye, indophenol dye and indigo dye. Among the most commonly used oxygen sensitive reactive dyes is methylene blue. The thiazine dye is at least one selected from the group consisting of methylene blue, thionine and toluidine blue. The oxazine dye is selected from at least one of resazurin, safranin O and azurite blue. The azine dye is at least one selected from m-cresol purple and azure A. The indophenol dye is dichloroindophenol. The indigo dye is at least one selected from indigo and indigo carmine. It should be understood that the color-changing dye is not limited to the above-listed kinds, and other redox indicators may be used as the color-changing dye of the present embodiment.
The reducing agent can reduce the color-changing dye in an oxidation state, so that the color-changing dye has the capability of performing oxidation-reduction reaction with oxygen. The reducing agent is at least one selected from dithionite, thiosulfate, bisulfite, sulfite, borohydride and ascorbic acid. Preferably, the dithionite salt is sodium dithionite. The thiosulfate is at least one selected from sodium thiosulfate, potassium thiosulfate and magnesium thiosulfate. The bisulfite is at least one selected from sodium bisulfite, potassium bisulfite and magnesium bisulfite. The sulfite is at least one selected from calcium sulfite, potassium sulfite and magnesium sulfite. The borohydride salt is at least one selected from sodium borohydride, potassium borohydride and magnesium borohydride.
The adhesive increases the viscosity and the adhesive force of the indicating ink so that the indicating ink meets the printability requirement. The binder is at least one selected from gelatin, hydroxyethyl cellulose, polyvinyl butyral, ethyl cellulose, cellulose acetate, polyvinyl pyrrolidone, polyethylene oxide and polymethyl methacrylate. It is understood that the binder is not limited to the above-listed materials, and other binders that can increase the viscosity and adhesion of the indicating ink and have a neutral pH are possible.
The solvent is at least one selected from water, ethanol, methanol, n-propanol, isopropanol, acetone and ethyl acetate. It is to be understood that the solvent is not limited to the above-mentioned materials, and other solvents having a neutral pH value and capable of dissolving the binder, the alkali and the color-changing dye may be used.
In one embodiment, the indicator ink further comprises 0.1 to 2 parts of an ultraviolet absorber. The ultraviolet absorbent is at least one selected from hydroxyphenyl benzotriazole, benzophenone, benzoxazone, α -cyanoacrylate, oxanilide, triaryl-s-triazine, formamidine, cinnamate, malonate, benzylidene, salicylate and benzoate. Preferably, the triaryl-s-triazine.
The indicating part 121 is formed after printing the indicating ink, and the indicating part 121 comprises 0.1-5 parts of color-changing dye, 1-5 parts of reducing agent and 30-50 parts of adhesive.
In one embodiment, indicator 121 is an acid sensitive indicator.
The indicating ink comprises the following components in parts by mass:
0.1 to 5 parts of color-changing dye;
2 to 20 parts of volatile acid;
40 to 70 parts of solvent; and
30-50 parts of a binder.
The color-changing dye is selected from at least one of m-cresol purple, thymolphthalein, o-cresol phthalein, bromothymol blue, cresol red, cetyl trimethyl ammonium cation, neutral red, phenol red, rhodamine, sulforhodamine 101 and thymol blue. It should be understood that other pH sensitive materials may also be used as the color-changing dye.
The volatile acid is at least one selected from carboxylic acids having 2-12 carbon atoms. Preferably, the volatile acid is at least one selected from the group consisting of acetic acid, propionic acid and butyric acid. It is understood that other acidic materials having a volatility may be used as the volatile acid.
The solvent is selected from at least one of water, ethanol, methanol, n-propanol, isopropanol, acetone and ethyl acetate. It is understood that the solvent is not limited to the above-listed materials, and other solvents that can dissolve the binder, the volatile acid, and the color-changing dye and have a neutral pH value may be used.
The adhesive increases the viscosity and the adhesive force of the indicating ink so that the indicating ink meets the printability requirement. The binder is selected from at least one of polyvinyl butyral, nitrocellulose, polyvinyl alcohol, hydroxyethyl cellulose and hydroxypropyl cellulose. It is understood that the binder is not limited to the above-listed materials, and other binders that can increase the viscosity and adhesion of the indicating ink and have a neutral pH are possible.
The indicating part 121 is formed after the indicating ink is printed, and the indicating part 121 comprises 0.1-5 parts of color-changing dye, 2-20 parts of volatile acid and 30-50 parts of binder.
In one embodiment, indicator 121 is a base sensitive indicator.
The indicating ink comprises the following components in parts by mass:
0.1 to 5 parts of color-changing dye;
2-20 parts of volatile alkali;
40 to 70 parts of solvent; and
30-50 parts of a binder.
The color-changing dye is at least one selected from bromophenol blue, bromocresol green, bromocresol purple, bromothymol blue, thymol blue, phenol red, cresol red, phenolphthalein, thymolphthalein and m-cresol purple. It should be understood that other pH sensitive materials may also be used as the color-changing dye.
The volatile alkali is selected from at least one of ammonia water, ammonium hydroxide, propylamine, n-butylamine, n-hexylamine and n-octylamine. It is understood that other volatile alkaline materials may be used as the volatile base.
The solvent is selected from at least one of water, ethanol, methanol, n-propanol, isopropanol, acetone and ethyl acetate. It is understood that the solvent is not limited to the above-listed materials, and other solvents that can dissolve the binder, the volatile base, and the color-changing dye and have a neutral pH value may be used.
The adhesive increases the viscosity and the adhesive force of the indicating ink so that the indicating ink meets the printability requirement. The binder is selected from at least one of polyvinyl butyral, nitrocellulose, polyvinyl alcohol, hydroxyethyl cellulose and hydroxypropyl cellulose. It is understood that the binder is not limited to the above-listed materials, and other binders that can increase the viscosity and adhesion of the indicating ink and have a neutral pH are possible.
The reference portion 123 is formed by printing with a common ink, and has at least two fixed colors for comparison with the indication portion 121, so that the user can clearly know whether the indication portion 121 is in the initial color (just beginning to use) or in the final color (the reaction time is longest and exceeds the valid period of the product), but it is preferable that the reference portion 123 further includes an intermediate color so that the consumer can judge the use time of the product by comparing the colors. The three different colors of the reference portion 123 are arranged annularly around the indicator portion 21, i.e. the reference portion 23 is annular, comprising three different color areas. The reference portion 23 has a thickness of 0.001mm to 0.01 mm.
The indication part 121 may be located at the periphery of the reference part 123 or the indication layer 120 may include only the indication part 121, and a color chart or the like for providing the reference part may be provided.
The base material layer 130 is laminated on the surface of the indicator layer 120. The substrate layer 130 has good transparency so that the color of the indication layer 120 can be observed through the substrate layer 130. The base material layer 130 plays a role of blocking air, and the material of the base material layer 130 is Polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polyvinyl chloride (PVC) or a composite transparent material with the surface compounded with the above materials. Of course, the material of the base layer 130 is not limited to the above-described material, and any other material having good transparency and air-tightness may be used as the material of the base layer 130.
In the illustrated embodiment, the base material layer 130 is bonded to the edge of the reference portion 123 of the indicator layer 120 by the adhesive layer 140 to form a housing capable of blocking gas, and the indicator portion 121 is housed in the housing. The adhesive layer 140 has a ring shape with a certain width. The adhesive layer 140 includes a first adhesive portion 142 and a second adhesive portion 144, and the first adhesive portion 142 and the second adhesive portion 144 are connected end to form the annular adhesive layer 140. The viscosity of the second adhesive part 144 is less than that of the first adhesive part 142, and the width of the second adhesive part 144 is less than that of the first adhesive part 142. A gap is formed between the outer edge of the second adhesive part 144 and the edges of the base material layer 130 and the base layer 110. Of course, in another embodiment, the base layer 130 may be bonded to the base layer 110 by the adhesive layer 140 to form a housing, and the entire indicator layer 120 may be housed in the housing.
Referring to fig. 2, 3 and 4, in the illustrated embodiment, the time lapse indicating device 100 further includes an actuating member 180. The actuating member 180 is used to open the closed space formed by the housing so that the interior of the housing 140 communicates with the exterior. In the illustrated embodiment, the actuator 180 is a gripping finger for easy gripping. The actuating member 180 is coupled to an edge of the substrate layer 130 corresponding to the position of the second adhesive part 144. Thus, by pulling the actuator 180, an upward force is applied to the substrate layer 130, and since the viscosity of the second adhesive portion 144 is lower than that of the first adhesive portion 142, the second adhesive portion 144 is easily opened, and an air-permeable gap is formed, so that the container is communicated with the outside, and the time lapse indicating apparatus 100 is activated.
In the illustrated embodiment, the base layer 110 and the base material layer 130 are substantially of a water droplet type, the second adhesive portion 144 corresponds to a tip of the water droplet type structure, and a gap is formed between an outer edge of the second adhesive portion 144 and an edge of the base material layer 130, so that the tip of the base material layer 130 serves as the actuator 180. In the illustrated embodiment, the joint of the actuator 180 and the substrate layer 130 is formed with an indentation, so that the actuator 180 is slightly tilted away from the base layer 110 to facilitate gripping.
The material of the adhesive layer 140 is at least one selected from the group consisting of acrylic resin, pressure sensitive glue, and UV glue. The thickness of the adhesive layer 140 is 0.01mm to 1 mm.
The adhesive layer 150 is formed on a surface of the substrate layer 110 away from the indicator layer 120. The adhesive layer 150 is used to adhere the time lapse indicating device 100 to a surface of another article. The material of the adhesive layer 150 is at least one selected from acrylic resin, polyurethane, and pressure sensitive adhesive. The thickness of the adhesive layer 150 is 0.01mm to 1 mm.
The release layer 160 is adhered to the surface of the adhesive layer 150. Preferably, the peeling layer 160 is cellophane or paper coated with silicone oil, so that the peeling layer 160 can be peeled from the surface of the adhesive layer 150. The thickness of the peeling layer 160 is 0.1mm to 2 mm.
The shielding member 170 is used for shielding the indication portion 121 of the indication layer 120, and can prevent light from directly irradiating the indication portion 121.
In the illustrated embodiment, the shield 170 is laminated on a surface of the substrate layer 130 on a side away from the indicator layer 130. The shield 170 is prepared by printing a commercially available temperature-sensitive ink or water-sensitive ink. The shield 170 is normally opaque and becomes transparent when the temperature of the shield reaches the color change temperature of the color changing ink, or when the shield is exposed to water or moisture. More preferably, the color change temperature of the temperature change ink is 36 ℃.
The time lapse indicating device 100 can effectively avoid the failure caused by that the indicating pigment of the indicating part 121 is easily decomposed by light after being irradiated by sunlight or light for a long time by arranging the shielding part 170 which can shield the indicating part 121 of the indicating layer 120, and the time lapse indicating device has strong light resistance; when the color-changing indicating device 100 is used, an upward acting force is applied to the substrate layer 130 by pulling the starting member 180, and since the viscosity of the second bonding portion 144 is lower than that of the first bonding portion 142, the position of the second bonding portion 144 is easily opened, and an air-permeable gap appears, so that the accommodating body is communicated with the outside, the indicating device 100 is activated when time passes, and the color of the indicating portion 121 changes along with the time passing; when the shielding member 170 is prepared by the temperature-sensitive ink, the shielding member 170 is opaque at normal temperature, so that light can be prevented from irradiating the indicating part 121, the dye of the indicating part 121 is prevented from being photolyzed under the illumination condition, when the color of the indicating part 121 needs to be observed, a body is contacted with the shielding member 170 or the shielding member 170 is heated in other modes, the temperature of the shielding member 170 rises to the color-changing temperature under the heating condition to become transparent, the color of the indicating part 121 can be observed, and the shielding member 170 becomes opaque again after the temperature drops, so that the light can be prevented from irradiating the indicating part 121; when the shielding member 170 is prepared by the water-color-changing ink, when the color of the indication part 121 needs to be observed, only a small amount of water is needed to coat the shielding member 170, the shielding member 170 becomes transparent and colorless after absorbing moisture, and the shielding member 170 becomes opaque again after the moisture is evaporated.
Referring to fig. 5, another embodiment of a time lapse indicating device 200 is substantially the same as the time lapse indicating device 100 in structure, except that: the shield 270 of the time lapse indicating device 200 extends outwardly from the edge of the substrate layer 230 and an indentation 290 is formed between the shield 270 and the substrate layer 230 to facilitate bending of the shield.
The shielding member 270 includes a connection layer 271 and a shielding layer 273 formed on a surface of the connection layer 271. In the illustrated embodiment, the edge of the substrate layer 230 is flush with the edge of the reference portion 223 of the indicator layer 220, the support layer 270 extends outward from the edge of the substrate layer 230, and an indentation 290 is formed between the edge of the support layer 270 and the substrate layer 230. In the illustrated embodiment, the base material layer 230 and the connection layer 271 are integrally molded, and the material of both is the same. Of course, in other embodiments, the material of the substrate layer 230 and the connection layer 271 may be different, as long as the connection layer 271 can function as the carrier shielding layer 273.
The shielding layer 230 is laminated on the surface of the connection layer 271. In the illustrated embodiment, the obscuring layer 273 is prepared by printing with an opaque ink. Of course, in other embodiments, the shielding layer 273 may be made of an opaque material, such as aluminum foil, laminated on the surface of the connecting layer 271, as long as the function of shielding light is achieved.
It should be noted that in use, the shield 270 also acts as an actuator, and the time lapse indicating device 200 may be actuated by pulling the shield 270 to apply an upward force to the substrate layer 230.
When the time lapse indicating device 200 is used, the shielding member 270 is pulled to apply an upward force to the substrate layer 230, so that the second bonding portion 244 is separated from the reference portion 223 to form a gap, thereby starting the time lapse indicating device 200, the shielding member 270 is folded along the indentation 290, the shielding member 270 is folded to cover the surface of the substrate layer 230, and the indicating portion 221 is shielded; when the color of the indicating portion 221 needs to be observed, the shielding member 270 only needs to be opened.
Referring to fig. 7, another embodiment of a time lapse indicating device 300 has substantially the same structure as the time lapse indicating device 100, except that: the shielding member 370 is stacked on the surface of the substrate layer 330, and a part of the shielding member 370 is fixedly connected to the substrate layer 330, so that the shielding member 370 can be opened at a predetermined angle with respect to the substrate layer 330.
The shielding member 370 includes a connection layer 371 and a shielding layer 373 formed on a surface of the connection layer 371. The material of the connection layer 371 is selected from at least one of paper, PET film, PVC film and BOPP film. Of course, in other embodiments, the material of the connection layer 371 is not limited to the above listed kind, as long as the connection layer 371 can function as the carrier shielding layer 373.
The shielding layer 373 is laminated on the surface of the connection layer 371, and the projection of the shielding layer 373 on the indicator layer 320 completely covers the indicator 321. In the illustrated embodiment, the masking layer 373 is prepared by printing with an opaque ink. Of course, in other embodiments, the shielding layer 373 may also be made of an opaque material, such as aluminum foil or hot stamping aluminum, laminated on the surface of the connection layer 371, as long as it can block light.
Referring to fig. 8, 9, 10, 11 and 12, in the illustrated embodiment, one end of the shielding member 370 near the actuating member 380 is bonded to the actuating member 380 by an adhesive layer 390. In one embodiment, the adhesive layer 390 is made from a pressure sensitive glue.
When the time lapse indicating device 300 is used, the second adhesive portion 344 is separated from the reference portion 323 to form a gap by pulling the actuating member 380 to apply an upward force to the base material layer 330, thereby actuating the time lapse indicating device 300; under normal conditions, the shielding layer 373 shields the indication portion 321 to function as light shielding, and when the color of the indication portion 321 needs to be observed, the connection layer 371 is lifted, so that the connection layer 371 and the substrate layer 330 are opened at a certain angle.
Referring to fig. 13, another embodiment of a time lapse indicating device 400 is substantially the same as the time lapse indicating device 300 in structure, except that: the material of the mask 470 of the time lapse indicating device 400 is an opaque material and the mask 470 is a single layer structure.
In one embodiment, the shielding member 470 is made of polyethylene with aluminum foil laminated on the surface, so that the shielding member 470 alone can function as the shielding indicating part 421.
When the time lapse indicating device 400 is used, the second adhesive portion 444 is separated from the reference portion 423 by applying an upward force to the substrate layer 430 by pulling the actuating member 480 to form a gap, thereby actuating the time lapse indicating device 400; under normal conditions, the shielding layer shielding member 470 shields the indication portion 421 to perform the function of shielding light, and when the color of the indication portion 421 needs to be observed, the shielding member 470 is lifted to open the shielding member 470 and the substrate layer 430 at a certain angle.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A time lapse indicating device, comprising:
a base layer;
an indicating layer laminated on a surface of the base layer, the indicating layer including an indicating portion containing a color-changing dye, the indicating portion being changeable in color depending on a contact time with air;
the base material layer is made of transparent materials, the base material layer is hermetically connected with at least one of the base layer and the indicating layer to form an accommodating body capable of blocking gas, and the indicating part is accommodated in a closed space of the accommodating body; and
the shielding piece can shield the indication part of the indication layer, is connected with the edge of the substrate layer and can be bent relative to the substrate layer to shield the indication part, and can be changed to be transparent when being heated and/or can be changed to be transparent when absorbing moisture.
2. The time lapse indicating device of claim 1, wherein the indicator is a carbon dioxide sensitive indicator, an oxygen sensitive indicator, an acid sensitive indicator, or a base sensitive indicator.
3. The time lapse indicating device of claim 1, wherein the shield is laminated to a surface of the substrate layer.
4. The time lapse indicating device of claim 1, wherein the shield is laminated to a surface of the substrate layer, and the shield portion is secured to a surface of the substrate layer on a side thereof remote from the base layer such that the shield is openable at a predetermined angle relative to the substrate layer.
5. The time lapse indicating device of claim 4, wherein the shield member comprises a connecting layer partially secured to the base material layer and a shielding layer formed on a surface of the connecting layer, the shielding layer shielding an indicating portion of the indicating layer.
6. The time lapse indicating device of claim 1, wherein the junction of the shield and the substrate layer is formed with an indentation.
7. The time-lapse indicating device of claim 1, wherein the base layer and at least one of the base layer and the indicating layer are bonded to form the housing by an adhesive layer, wherein the adhesive layer includes a first adhesive portion and a second adhesive portion, and wherein a viscosity of the second adhesive portion is lower than a viscosity of the first adhesive portion.
8. The time lapse indicating device of claim 1, further comprising an actuating member coupled to the edge of the substrate layer, the actuating member being configured to move the substrate layer away from the base layer to open the substrate layer and the edge of the base layer to form a gap.
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| CN201710557542.2A CN107436303B (en) | 2017-07-10 | 2017-07-10 | Time lapse indicating device |
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| CN201710557542.2A CN107436303B (en) | 2017-07-10 | 2017-07-10 | Time lapse indicating device |
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| CN107436303B true CN107436303B (en) | 2020-11-13 |
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| CN112957254A (en) * | 2021-02-04 | 2021-06-15 | 南京天华科技开发有限责任公司 | Carbon dioxide indicator, applications and methods |
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