WO2013000401A1 - 监测热敏感物品品质状态的时间-温度指示器和监测方法 - Google Patents
监测热敏感物品品质状态的时间-温度指示器和监测方法 Download PDFInfo
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- WO2013000401A1 WO2013000401A1 PCT/CN2012/077568 CN2012077568W WO2013000401A1 WO 2013000401 A1 WO2013000401 A1 WO 2013000401A1 CN 2012077568 W CN2012077568 W CN 2012077568W WO 2013000401 A1 WO2013000401 A1 WO 2013000401A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/12—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in colour, translucency or reflectance
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions
- B32B3/04—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by at least one layer folded at the edge, e.g. over another layer ; characterised by at least one layer enveloping or enclosing a material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/02—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/06—Interconnection of layers permitting easy separation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D79/00—Kinds or details of packages, not otherwise provided for
- B65D79/02—Arrangements or devices for indicating incorrect storage or transport
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
- F16D66/02—Apparatus for indicating wear
- F16D66/021—Apparatus for indicating wear using electrical detection or indication means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K3/00—Thermometers giving results other than momentary value of temperature
- G01K3/02—Thermometers giving results other than momentary value of temperature giving means values; giving integrated values
- G01K3/04—Thermometers giving results other than momentary value of temperature giving means values; giving integrated values in respect of time
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/402—Coloured
- B32B2307/4026—Coloured within the layer by addition of a colorant, e.g. pigments, dyes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/748—Releasability
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2519/00—Labels, badges
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
Definitions
- the present invention relates to a time-temperature indicator for monitoring the quality status of a heat sensitive item and a method of monitoring the quality status of the heat sensitive item.
- the present invention relates to the use of a volatile dye to make a time-temperature indicator that indicates whether a heat sensitive article is subjected to temperature or is subjected to a temperature for a long period of time due to a color change produced by volatilization of the volatile dye. Deterioration or failure. Background technique
- Some items or products that are very sensitive to temperature need to be stored or transported at low temperatures, such as most vaccines, biological products, biologically active samples and some medicines, as well as fresh foods such as fresh milk, dairy products, fresh meat, fresh fish, etc. .
- shelf life or shelf life is the main method to ensure the safe use of these goods/products, especially drugs or foods, but these methods often fail to reflect whether drugs or foods that need to be stored and transported at low temperatures are safe.
- Excessive exposure time at storage and storage temperatures Use simple and inexpensive methods to accurately indicate various heat sensitive items such as fresh foods that require low temperature storage, vaccines (between 2T and 8 °C), biologically active samples, etc., during storage or transportation because they exceed safe storage and transportation temperatures. Deterioration, failure or inactivation can better ensure the safety and use of the product.
- TempTime (formerly Lifelines) in the United States first developed a label that met the requirements of the WHO and applied it to polio vaccines produced by three vaccine manufacturers, GlaxoSmithKline, Sanofi-Pasteur and Novartis.
- the tags supplied by Temptime are mainly used according to the functions used. Class.
- the first type is the Critical Temperature Indicator (CTI), which changes color as soon as the temperature exceeds the set value.
- CTI Critical Temperature-Time Indicator
- the second type is the so-called Critical Temperature-Time Indicator (CTTI), which has a delayed color change speed and is discolored after exposure to a set temperature for a few minutes or tens of minutes.
- CTTI Critical Temperature-Time Indicator
- the response time of the third type of tag needs to be longer. It is called Time-Temperature Indicator (TTI). It is the temperature-sensitive material that changes color after receiving a certain amount of heat. These tags are suitable for indicating vaccine. Hot history label.
- the polymer type was developed by TempTime Corporation of the United States and is based on the solid-state 1,4-addition polymerization of a substituted diacetylene derivative to form a colored polymer.
- the rate of the polymerization increases with increasing temperature, and the resulting polymer darkens the color, indicating whether the vaccine is overheated by contrast with the surrounding color.
- This type of label needs to be screened to synthesize a suitable polymerized monomer, and the label needs to be stored at a temperature of -18 n C or lower after it is made, which significantly increases the cost of label use.
- the early enzyme-reactive indicator is essentially a type of pH indicator that releases protons H+ by measuring the hydrolysis of the enzyme-catalyzed lipid substrate, causing the pH of the medium to change, causing a change in color, indicating temperature or heat history. .
- the enzymatic hydrolysis reaction increases with increasing temperature, and the release rate of protons is therefore accelerated.
- Representative is the Vitsab ring indicator developed by a Swedish company.
- a representative product of the temperature indicator is the 3M Monitor Mark indicator produced by 3M Company of the United States. It is based on the diffusion of dye on the string. The temperature indication range and response period depend on the type of dye.
- Another form of diffusion type indicator is to apply a material having a specific melting point to a porous substrate, the refractive indices of which are close to each other. When the coated material melts and diffuses into the porous substrate above a certain temperature, the light in the pores of the matrix is removed, and the transmittance of the substrate is increased, so that a change in color can also be achieved, indicating a heating process.
- time-temperature indicators and methods that can be used to monitor the thermal history of heat sensitive articles for storage and monitoring of heat sensitive items, accurately indicating whether the heat sensitive items have failed or deteriorated.
- One object of the present invention is to provide a time-temperature indicator for monitoring the quality status of a heat sensitive article for monitoring the thermal history of the heat sensitive article during storage and transportation and indicating whether the heat sensitive article has failed or deteriorated.
- Another object of the present invention is to provide a method of preparing a temperature-time indicator for monitoring the quality status of a heat sensitive article.
- a volatile substance having a certain color (referred to herein as a volatile dye) is attached to a heat sensitive article, and an adsorbent material capable of adsorbing the dye is attached to the volatile dye, and then Sealing the volatile dye layer and the adsorbent material layer on the heat sensitive article using a sealing layer to form a laminated structure; during storage and transportation of the heat sensitive article, the volatile dye absorbs heat and is volatilized Adsorption of the adsorbent layer, the volatile dye layer is lighter due to heat absorption, and the amount of dye evaporation is closely related to its thermal history. On the one hand, at a certain temperature, the amount of volatilization of the dye increases with time.
- the quality change process of heat sensitive articles has similar characteristics, that is, at a certain temperature, the quality of the heat sensitive articles deteriorates with time, and after a certain time, the heat sensitive articles fail or deteriorate; High, the quality of the heat-sensitive substance deteriorates rapidly, and the time for failure or deterioration is shortened.
- the appropriate dye type and amount and/or other methods can be selected to control the rate of dye volatilization, so that the color change response of the dye layer to the thermal history and the quality change of the heat sensitive article are similar to the thermal history. the same.
- a first aspect of the present invention provides a time-temperature indicator for monitoring the quality status of a heat sensitive article comprising two laminated portions of an indicator functional layer and an adsorption functional layer that are physically independent of each other prior to use, wherein:
- the indication function layer includes:
- the difference between the activation energy of the volatilization process of the volatile dye layer and the activation energy of the quality change process of the heat sensitive article is within a predetermined range Inside;
- a first release film layer overlying the volatile dye layer, wherein the substrate material layer and the first release film layer are larger in size than the volatile dye layer and the volatile dye layer is sealed Between the substrate material layer and the first release film layer;
- the adsorption functional layer includes:
- a layer of adsorbent material coated on one side of the layer of substrate material wherein a size of the layer of adsorbent material is greater than a size of the layer of volatile dye
- a self-adhesive layer applied to the layer of substrate material and surrounding the periphery of the layer of adsorbent material;
- a second release film layer overlying the adhesive layer and the layer of adsorbent material.
- the first release film layer and the second release film layer are separated, the adsorbent material layer is aligned with the volatile dye layer, and the volatile dye layer and the adsorbent layer are Enclosed between the first substrate layer and the second substrate layer, a time-temperature indicator in a use state is formed and closely attached to the heat sensitive article.
- a second aspect of the invention provides a heat sensitive article using the time-temperature indicator according to the first aspect of the invention.
- a third aspect of the invention provides a method of preparing a time-temperature indicator for monitoring the quality status of a heat sensitive article, comprising the steps of:
- the size of the layer of adsorbent material is greater than the size of the layer of volatile dye
- the second release film layer is covered on the adhesive layer and the adsorption material layer, and the adsorption material layer is enclosed between the substrate material and the second release film layer to form an adsorption functional layer.
- a fourth aspect of the present invention provides a method for monitoring a quality state of a heat sensitive article, comprising the steps of: providing a heat sensitive article, wherein the heat sensitive article can maintain an effective quality state at a temperature T1 for a duration of time ti ;
- the end point color difference of the volatile dye layer after a time t1 at a temperature T1 is
- a layer of adsorbing material irreversibly absorbing the dye volatilized by the volatile dye layer
- a sealing film layer having a size larger than a size of the adsorbing material layer and the volatile dye layer, and the adsorbing a layer of material and a layer of volatile dye are sealingly attached to the heat sensitive article;
- the heat sensitive article after attaching the sealing film is subjected to actual disposal
- the order of attaching the volatile dye layer and the adsorbent material layer is not limited, that is, the volatile dye layer may be attached first, and then the adsorbent material layer may be attached; or the adsorbent material may be attached first. Layer, then attach a layer of volatile material.
- Figure 1 is a block diagram showing the construction of a time-temperature indicator in accordance with one embodiment of the present invention.
- Figure 2A is a schematic illustration of a time-temperature indicator usage and color change process made in accordance with one embodiment of the present invention.
- Figure 2B is a schematic illustration of the use and discoloration process of a time-temperature indicator made in accordance with one embodiment of the present invention.
- Figure 3 is a time-temperature indicator made by using dye A as a volatile dye in Example 1 of the present invention. Use and color change process renderings.
- 4A and 4B show the discoloration speed of the time-temperature indicator produced by the dye A as the volatile dye at different temperatures in Example 2 of the present invention.
- Fig. 6 is a time-temperature indicator designed and manufactured for a hepatitis B vaccine (Hep-B) using dye A as a volatile dye in Example 2 of the present invention, and its color change response is almost identical to that of the vaccine.
- Hep-B hepatitis B vaccine
- Figure 7 is a graph showing the initial colorimetric value of an indicator made using dye A as a volatile dye, using different ink (i.e., dye) concentrations and the same amount of ink, and a color changing process at the same temperature, in Example 3 of the present invention.
- Figure 8 is an indicator of the use of dye A as a volatile dye, using different ink concentrations and the same amount of ink, in accordance with Example 3 of the present invention, the time at which the indicator reaches the end point is linear with the amount of volatile dye printed per unit area. .
- Figure 9 is a graph showing the variation of the color difference of the indicator of the present invention using the three compounds of the formula I (dies A, B, and C, respectively) as a time-temperature indicator, at 50 n C, in accordance with Example 4 of the present invention. .
- Figure 10 is a diagram showing the variation of the color difference of the indicator with time at the same temperature using the cyclodextrin, methylene chloride, methyl acetate, ethanol, ethyl acetate as the solvent, respectively, in Example 5 of the present invention.
- Figure 11 is a graph showing the relationship between the change in color difference at 80 n C and the time at which an indicator of the present invention was added to an organic solution of the dye A in an organic solution of the dye A.
- Fig. 12 shows a time-temperature indicator in which the dye B is a volatile dye and three different adsorbent materials are used in the embodiment 7 of the present invention, and the color difference of the indicator layer of the indicator changes with time in the same temperature environment.
- Indicative functional layer 1 second release film layer 23, volatile dye layer 15, adsorbent material layer 21, adsorption functional layer 2, self-adhesive layer 12, reference color layer 16, self-adhesive layer 22, heat sensitive article 3
- the sealing film layer 13 the first release film layer 17, the release film layer 23, the substrate material layer 10, the sealant layer 14, the substrate material layer 20, and the isolation layer 24.
- a first aspect of the invention provides a time-temperature indicator for monitoring the quality status of a heat sensitive item.
- the time-temperature indicator of the present invention comprises physically independent of each other prior to use.
- the two functional sections of the functional layer and the adsorption functional layer wherein:
- the indication function layer includes:
- a first release film layer overlying the volatile dye layer, wherein the substrate material layer and the first release film layer have a size larger than a size of the volatile dye layer, and the volatile a dye layer is sealed between the first substrate material layer and the first release film layer;
- the difference between the activation energy of the volatilization process of the volatile dye layer and the activation energy of the quality change process of the heat sensitive article is within a predetermined range
- the adsorption functional layer includes:
- a layer of adsorbent material applied to one side of the layer of substrate material, wherein a size of the layer of adsorbent material is greater than a size of the layer of volatile dye;
- a self-adhesive layer applied to the layer of substrate material and surrounding the periphery of the layer of adsorbent material;
- a second release film layer overlying the adhesive layer and the layer of adsorbent material.
- separating the first release film layer and the second release film layer aligning the adsorbent material layer with the volatile dye layer, and enclosing the volatile dye layer and the adsorbent material layer on the first substrate layer and Between the two substrate layers, a time-temperature indicator of the state of use is formed.
- the first substrate layer of the time-temperature indicator is closely attached to the heat sensitive article. Before using the heat sensitive article, the layer of adsorbent material is separated from the layer of volatile material, and then the color of the volatile dye layer is observed or measured.
- the time-temperature indicator of the present invention is previously subjected to the same treatment as the heat sensitive article failure or deterioration process, the color difference of the volatile dye layer is measured with a color difference meter, and the color difference value is defined as the end point color difference.
- the actual color difference of the volatile dye layer is measured prior to use of the heat sensitive article having the time-temperature indicator of the present invention. If the actual color difference of the volatile dye layer is greater than the end color difference, it indicates that the heat sensitive article has not expired or deteriorated and is in a usable state. If the actual color difference of the volatile dye layer is less than or equal to the end color difference, it indicates that the heat sensitive article has failed or deteriorated.
- the color difference meter can It is any color difference meter that is commercially available.
- a reference color label having the endpoint chromatic aberration is prepared with a non-volatile dye or pigment after measuring the endpoint chromatic aberration.
- the color of the volatile dye layer was visually observed and compared to a reference color label. If the color of the volatile dye layer is darker than the color of the reference color label, it indicates that the heat sensitive item has not expired or deteriorated and is in a usable state. If the color of the volatile dye layer is lighter or the same as the color of the reference color label, it means that the heat sensitive item has failed or deteriorated and cannot be used.
- the time-temperature indicator of the present invention can be treated at time T1 at time T1, and the volatile dye layer after disposal is recorded. Chromatic aberration, as the end color difference. If the time tl is too long, the end point chromatic aberration can also be measured using an accelerated experiment method well known to those skilled in the art.
- the reference color label may be separate from or incorporated in the indicator function layer and the adsorption function layer.
- the reference color label is disposed adjacent to the volatile dye layer.
- any feasible arrangement may be employed, such as being arranged side by side with the volatile dye layer, or surrounding the volatile dye layer arrangement or the like.
- a reference color layer is applied in the vicinity of or around it, with the reference color layer as a reference color label.
- the first substrate material layer itself is prepared as a reference color label.
- the heat sensitive item is selected from the group consisting of a vaccine, a biological product, a biologically active sample, a pharmaceutical, a food or a drink.
- the heat sensitive article is an article that needs to be stored and/or transported at -40 ° C to 50 ° C, preferably an article that needs to be stored and/or transported at -30 ° C to 40 ° C, preferably Articles that need to be stored and/or shipped at -30 ° C to 30 ° C, preferably those that need to be stored and/or transported at -20 ° C to 20 ° C, preferably at -20 ° C to 10 ° C Items stored and/or transported, such as items that need to be stored and/or transported at -10 ° C to 10 ° C, such as items that need to be stored and/or transported at 0 ° C to 10 ° C, for example at 2 ° Items stored and/or transported at C to 8 °C.
- the heat sensitive items include, but are not limited to: vaccines, such as heat labile vaccines, such as a small paralysis vaccine, typhoid vaccine, hepatitis B vaccine, etc.
- Products such as human immunoglobulin, anti-human tau cell porcine immunoglobulin, etc., biologically active samples, such as plasma, whole blood, serum, etc., drugs, such as posterior pituitary injection, stannous fentanyl for injection, etc.
- food such as fresh meat, fresh fish, etc.
- drinks such as fresh milk, dairy products, yogurt, pasteurized milk, etc.
- the difference between the activation energy of the volatile dye layer volatilization process and the activation energy of the heat sensitive article or the activation energy of the failure process is within a predetermined range, preferably the difference is ⁇ 10 kJ/mol Within the range, it is more preferably in the range of ⁇ 5 kJ/mol.
- the activation energy of the volatile dye layer volatilization process is 60 - 140 kJ/mol.
- the "activation energy of the volatilization process of the volatile dye layer" described in the present invention means the apparent activation energy of the volatile dye layer volatilization process of the time-temperature indicator of the present invention in use.
- the volatile dye layer is solid or liquid in the range of 0 - 80 ° C, more preferably in the range of 0 - 50 ° C.
- the volatile dye is not particularly limited, and any volatile dye capable of achieving the object of the present invention can be used.
- the volatile dye is selected from the group consisting of an azo dye, an anthraquinone dye, a compound of formula I, or a combination thereof, wherein the compound of formula I has the following formula:
- R1 is selected from hydrogen, halogen, C straight or branched fluorenyl, such as methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, n-pentyl, isopentyl , neopentyl, n-hexyl, etc.; d_ 6 straight or branched decyloxy, such as methoxy, ethoxy, propoxy, isopropoxy, butoxy, sec-butoxy, tert-butoxy , pentyloxy, isopentyloxy, neopentyloxy, hexyloxy, etc.; -COR2, -COOR2;
- R2 is selected from hydrogen, d- 6 straight or branched fluorenyl, such as methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, n-pentyl, isopentyl, neopentyl, n-hexyl and the like; d_ 6 straight-chain or branched-chain alkyl group, for example methylamino, ethylamino, propylamino, isopropylamino, butylamino, sec-butylamino, t-butylamino, pentylamine Base, isoamylamine, neopentylamino, hexylamino and the like.
- fluorenyl such as methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-
- the volatile dye is selected from the compounds of formula I above.
- the volatile dye layer further comprises one or more volatile auxiliary agents.
- the volatile auxiliary agent is not particularly limited in the present invention, and any volatile auxiliary agent capable of achieving the object of the present invention can be used as long as it can adjust the volatilization speed of the volatile dye of the present invention.
- the volatile additives described herein can be volatile The volatilization of the dye has an accelerating effect or a slowing effect.
- the volatilization aid is selected from one or more of the following volatile compounds:
- a linear indole hydrocarbon a branched anthracene hydrocarbon, a cyclic anthracene hydrocarbon or an aromatic hydrocarbon such as hexanthene, hydrazine, octopine or an isomer thereof, cyclohexanone, cycloheptadine, cyclopentanthene, naphthalene, anthracene, etc.;
- a straight or branched chain or an aromatic or cyclic alcohol such as butanol, lauryl alcohol, tridecyl alcohol, tetradecanol, pentadecyl alcohol, stearyl alcohol, heptadecyl alcohol, stearyl alcohol, etc.;
- Linear or branched or aromatic or cyclic carboxylic acids such as maleic acid, fumaric acid, lauric acid, tridecanoic acid, myristic acid, hexadecanoic acid, palmitic acid, fatty acid, azelaic acid, twelve Azelaic acid, etc.;
- Amino acids such as aminobenzoic acid, leucine, phenylalanine, etc.
- Sulfone such as diphenyl sulfone, diphenyl disulfone, dibenzyl sulfone, dibutyl sulfone, etc.;
- the volatile dye layer further comprises one or more solvents.
- the solvent is not specifically limited in the present invention, and any solvent capable of achieving the object of the present invention can be used.
- the solvent is selected from the group consisting of water, hexane, cyclohexane, tetrahydrofuran, benzene, xylene, methanol, ethanol, isopropanol, 2-butanol, acetone, diethyl ether, methyl acetate, ethyl acetate, One or more of carbon tetrachloride, chloroform, methylene chloride, and dichloroacetam.
- the kind of the adsorbent material is not particularly limited, and any adsorbent material capable of achieving the object of the present invention can be used.
- the adsorbent material of the present invention is capable of irreversibly adsorbing a dye volatilized from the volatile dye layer, and more preferably, the adsorbent material adsorbs a volatile dye volatilized from the volatile dye layer.
- the speed is much higher than the volatilization rate of volatile dyes.
- the rate at which the volatile dye is adsorbed is essentially only related to the rate of volatilization of the dye.
- the volatilization rate of the dye is only affected by the temperature, and is not affected by factors such as the hindrance of saturated/near saturated vapor generated by self-volatilization.
- the amount of volatilization of the dye is only affected by temperature and time, so its color change due to volatilization can more accurately reflect the thermal history of the time-temperature indicator, thereby more accurately monitoring the thermal history of heat sensitive items.
- an adsorbent material having a lower adsorption rate can also be used.
- the absorbent material includes, but is not limited to, oily or water-based adhesives, commercial self-adhesive papers, and self-adhesive tapes.
- the materials of the first substrate material layer and the second substrate material layer are not specifically limited, and Any substrate material that achieves the objectives of the present invention is used.
- the first substrate material layer and the second substrate material layer may use the same or different materials.
- the first substrate material layer together with the first release film layer seals the volatile dye layer; the second substrate material layer together with the second release film layer seals the adsorbent material layer.
- the first substrate material layer has a laminated structure, and a sealing layer, a self-adhesive layer and a third release film layer are sequentially included on the opposite side of the substrate material from the volatile dye layer. .
- the third release film layer is first peeled off, and the adhesive layer on the first substrate material layer is applied to the heat sensitive article.
- the first release film layer and the second release film layer are then peeled off, the adsorbent material layer is aligned with the volatile dye layer, and the adsorbent material layer and the volatile dye layer are sealed together on the heat sensitive article.
- the time-temperature indicator further comprises an isolating layer between the volatile dye layer and the layer of adsorbent material when in use.
- the barrier layer Prior to use, the barrier layer is between the volatile dye layer and the first release film layer or between the adsorbent material layer and the second release film.
- the barrier layer can be used to adjust the rate of volatilization of volatile dyes in the volatile dye layer.
- the barrier layer can help separate the volatile dye layer from the layer of adsorbent material.
- the material of the separator is not specifically limited in the present invention, and any material that can achieve the object of the present invention can be used. Non-limiting examples include nonwovens, nylon P6 mesh, nylon P66 mesh, and the like. When the color or chromatic aberration of the volatile dye layer is observed or measured, the barrier layer is separated from the layer of adsorbent material from the volatile dye layer.
- the release film layer of the present invention is not limited in any way, and any release film layer capable of achieving the object of the present invention can be used. It will be appreciated that the release film layer of the present invention can be readily selected by those skilled in the art in light of the teachings herein.
- the first, second, and third release film layers do not function to adsorb volatile dyes.
- the materials used for the release film are widely selected, and non-limiting examples include: paper, wax paper, polymer film such as polyethylene, polyvinyl chloride, polypropylene, polystyrene, polyethylene terephthalate. Ester and the like.
- the rate obeys the Arrhenius equation, ie ELT, where k is the rate of change of the heat-sensitive item metamorphism or failure process, T is the absolute temperature (K), E is the activation energy of the heat-sensitive item metamorphism or failure process, and R is the ideal gas constant , A is a constant.
- the rate of volatilization obeys the Arrhenius equation, ie 2 '303.
- volatility The type of dye and its amount or the addition of a volatilization aid can adjust the volatilization rate of the volatile dye layer according to the present invention to a rate of change near the deterioration or failure process of the heat sensitive article.
- the color decay rate of the volatile dye is used to accurately indicate the thermal history of the deterioration or failure process of the heat sensitive article.
- the color fading rate of volatile dyes has a positive correlation with its volatilization rate. Therefore, the color fading rate has a positive correlation with the rate of change of the heat sensitive article deterioration or failure process.
- the first substrate layer has one or more transparent regions.
- the time-temperature indicator is used, the first release film layer and the second release film layer are separated, the adsorbent material layer is aligned with the volatile dye layer, and the volatile dye layer and the adsorbent material layer are closed.
- a time-temperature indicator in a use state is formed between the first substrate layer and the second substrate layer.
- the second substrate layer is applied to the heat sensitive article.
- the color depth or chromatic aberration of the volatile dye layer is observed or measured directly through the transparent region prior to use of the heat sensitive article.
- the first substrate layer itself is transparent, and when the time-temperature indicator is used, the second substrate layer is applied to the heat sensitive article.
- the color change of the volatile dye layer is observed or measured through the transparent first substrate layer prior to use of the heat sensitive article.
- heat sensitive items can be selected at any time to remove heat sensitive items that have failed or deteriorated, thereby reducing unnecessary storage and transportation. Because most heat sensitive materials are stored and transported at low temperatures, reducing unnecessary storage and transportation can significantly reduce storage and transportation costs.
- the user may choose to use a heat sensitive item that is lighter in color but has not deteriorated or failed, thereby reducing the likelihood of failure or deterioration of the heat sensitive material.
- the materials of the first substrate material layer and the second substrate material layer are not particularly limited, and any substrate material capable of achieving the object of the present invention can be used.
- the first substrate material layer and the second substrate material layer may use the same or different materials.
- the first substrate material layer together with the first release film layer seals the volatile dye layer; the second substrate material layer together with the second release film layer seals the adsorbent material layer.
- the second substrate material layer has a laminated structure, and the sealing material layer, the self-adhesive layer and the fourth release film layer are sequentially arranged on the opposite side of the substrate material from the volatile dye layer. .
- the fourth release film layer is first peeled off, and the adhesive layer on the second substrate material layer is applied to the heat sensitive article.
- the first release film layer and the second release film layer are then peeled off, the adsorbent material layer is aligned with the volatile dye layer, and the adsorbent material layer and the volatile dye layer are sealed together on the heat sensitive article.
- time-temperature indicator provided by the first aspect of the invention, the cost can be reduced and the accuracy of monitoring the thermal history of the heat sensitive article can be improved.
- Personalized time-temperature indicators can be developed for a variety of heat-sensitive items by selecting the appropriate volatile dyes, volatile additives, solvents and their amounts. Specifically, for specific heat-sensitive items, the activation energy of the failure or metamorphism process can be determined experimentally and the various constants in the Arrhenius equation can be determined. Then, by selecting appropriate volatile dyes, volatile assistants, solvents and their amounts, and adjusting the constants in the Arrhenius equation of the volatile dye layer to be similar or identical to the specific heat sensitive article, accurate monitoring of the specific heat sensitivity can be obtained.
- a time-temperature indicator of the thermal history of the item which is not possible in the prior art.
- the time-temperature indicator provided by the first aspect of the present invention directly judges whether the heat sensitive article is ineffective or deteriorated by the color change of the volatile dye layer, and is simple and easy.
- Most time-temperature indicators of the prior art can only be stored at low temperatures.
- the time-temperature indicator of the present invention skillfully adopts a structure in which the indicating functional layer and the adsorption functional layer are separately stored and combined in use, and therefore, the temperature-time display of the present invention can be stored at normal temperature, thereby reducing the use cost of the indicator. .
- the time-temperature indicator provided by the first aspect of the invention is implemented using a new indicator color change principle. Unlike the polymer type, the enzyme reaction type, and the diffusion type indicator, the present invention utilizes the volatile matter of the substance to achieve a color change by a volatile-adsorbed dye transfer process. With the new principle, low-cost materials can be used, while broadening the choice of materials and reducing the overall cost of indicator production.
- the color of the volatile dye layer can be directly observed through the first substrate material layer, which allows the user
- the heat sensitive articles can be selectively used according to the color of the volatile dye layer, and the heat sensitive articles that have deteriorated or failed are screened during storage and transportation, which obviously improves the use efficiency of the heat sensitive articles and reduces the storage and transportation costs.
- the time-temperature indicator according to the first aspect of the invention is attached to the packaging container of the heat sensitive article, and of course may be attached to the heat sensitive article in any convenient manner.
- the attachment described herein can be in any feasible manner, such as pasting.
- the time-temperature indicator of the present invention can be applied to the outer surface of a primary package (or a minimal package, such as a vaccine for an ampoule) such as a vaccine, a drug, etc., such as a glass bottle of vaccine or a glass bottle of a drug.
- a second aspect of the invention provides a heat sensitive article using a temperature index according to the first aspect of the invention Display.
- the heat sensitive article is as described in the first aspect of the invention.
- a third aspect of the invention provides a method of preparing a time-temperature indicator for monitoring the quality status of a heat sensitive article.
- the method of the third aspect of the invention comprises the steps of:
- the first release film and the second release film are peeled off, the adsorption functional layer is aligned with the volatile dye layer, the first substrate material layer is closely attached to the heat sensitive article, and the volatile dye is The layer and the layer of adsorbent material are sealed together between the first substrate material layer and the second substrate material layer to form a time-temperature index of use.
- the separated indicating functional layer and the adsorbing functional layer were obtained. Therefore, the indicating functional layer and the adsorbing functional layer of the time-temperature indicator of the present invention can be separately stored at normal temperature, which is difficult to achieve in the prior art time-temperature indicator.
- the time-temperature indicator of the invention is combined and attached to the heat sensitive article, and the heat history of the heat sensitive article can be accurately monitored through the storage and transportation process together with the heat sensitive article, and the quality of the heat sensitive article can be accurately determined. status.
- the time-temperature indicator of the present invention is previously subjected to the same process as the heat sensitive article failure or deterioration process, and the color difference when the heat sensitive article fails or deteriorates is measured by a color difference meter, and recorded as the end point chromatic aberration.
- the layer of adsorbent material Prior to the use of the heat sensitive article, the layer of adsorbent material is separated from the volatile dye layer, the actual color difference of the volatile dye layer is measured with a color difference meter, and the actual color difference is compared to the endpoint color difference. If the actual color difference is greater than the end color difference, Then the heat sensitive article is not ineffective or deteriorated and is in a usable quality state. If the actual color difference is less than or equal to the end point color difference, the heat sensitive item has failed or deteriorated and is in an unusable quality state.
- the time-temperature indicator of the present invention is previously subjected to the same process as the failure or deterioration of the heat sensitive article, and the color difference at the time of failure or deterioration of the heat sensitive article is measured and recorded as the end point chromatic aberration.
- a reference color label having an endpoint chromatic aberration is prepared using a non-volatile dye or a non-volatile pigment.
- the reference color label may be independent of the indication function layer and the adsorption function layer.
- the reference color label is included in the indication function layer.
- a non-volatile dye or non-volatile pigment having an endpoint chromatic aberration is applied adjacent to the volatile dye layer after application of the volatile dye layer to form a reference color label.
- the reference color label may be disposed adjacent to the volatile dye layer in any possible manner, such as alongside the volatile dye layer, surrounding the volatile dye layer, and the like. More preferably, the first substrate material layer itself is prepared as a reference color label.
- the time-temperature indicator of the present invention is treated at time T1 at T1 temperature, and the color difference of the volatile dye layer after disposal is recorded. , as the end color difference.
- the heat sensitive item is selected from the group consisting of a vaccine, a biological product, a biologically active sample, a pharmaceutical, a food or a drink.
- the heat sensitive article is an article that needs to be stored and/or transported at -40 ° C to 50 ° C, preferably an article that needs to be stored and/or transported at -30 ° C to 40 ° C, preferably Articles that need to be stored and/or shipped at -30 ° C to 30 ° C, preferably those that need to be stored and/or transported at -20 ° C to 20 ° C, preferably at -20 ° C to 10 ° C Items stored and/or transported, such as items that need to be stored and/or transported at -10 ° C to 10 ° C, such as items that need to be stored and/or transported at 0 ° C to 10 ° C, for example at 2 ° Items stored and/or transported at C to 8 °C.
- the heat sensitive articles include, but are not limited to: vaccines, such as heat labile vaccines, such as a small paralysis vaccine, typhoid vaccine, hepatitis B vaccine, etc., biological products, such as human immunoglobulin, anti-human T cell pig immunity A globulin, a biologically active sample, such as plasma, whole blood, serum, etc., a drug, such as a posterior pituitary injection, a stannous thiophene for injection, a food, such as fresh meat, fresh fish, etc., such as fresh Milk, dairy products, yogurt, pasteurized milk, etc.
- vaccines such as heat labile vaccines, such as a small paralysis vaccine, typhoid vaccine, hepatitis B vaccine, etc.
- biological products such as human immunoglobulin, anti-human T cell pig immunity A globulin
- a biologically active sample such as plasma, whole blood, serum, etc.
- a drug such as a posterior pituitary
- the difference between the activation energy of the volatile dye layer volatilization process and the activation energy of the heat sensitive article or the activation energy of the failure process is within a predetermined range, preferably the difference is ⁇ 10 kJ/mol Within the range, it is more preferably in the range of ⁇ 5 kJ/mol.
- the activation energy of the volatile dye layer volatilization process is 60 - 140 kJ/mol.
- the "activation energy of the volatilization process of the volatile dye layer" in the present invention means the apparent activation energy of the volatile dye layer volatilization process of the time-temperature indicator of the present invention in use.
- the volatile dye layer is solid or liquid in the range of 0 - 80 ° C, more preferably in the range of 0 - 50 ° C.
- the volatile dye is not particularly limited, and any volatile dye capable of achieving the object of the present invention can be used.
- the volatile dye is selected from the group consisting of an azo dye, an anthraquinone dye, a compound of formula I, or a combination thereof, wherein the compound of formula I has the following formula:
- R1 is selected from hydrogen, halogen, C straight or branched fluorenyl, such as methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, n-pentyl, isopentyl , neopentyl, n-hexyl, etc.; d_ 6 straight or branched decyloxy, such as methoxy, ethoxy, propoxy, isopropoxy, butoxy, sec-butoxy, tert-butoxy , pentyloxy, isopentyloxy, neopentyloxy, hexyloxy, etc.; -COR2, -COOR2;
- R2 is selected from hydrogen, d- 6 straight or branched fluorenyl, such as methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, n-pentyl, isopentyl, Neopentyl, n-hexyl, etc.; d- 6 straight or branched mercaptoamine such as methylamino, ethylamino, propylamino, isopropylamino, butylamino, sec-butylamino, tert-butylamino, pentylamino , isoamylamine, neopentylamino, hexylamine, and the like.
- fluorenyl such as methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl,
- the volatile dye is selected from the compounds of formula I above.
- the volatile dye layer further comprises one or more volatile auxiliary agents.
- the volatile auxiliary agent is not particularly limited in the present invention, and any volatile auxiliary agent capable of achieving the object of the present invention can be used.
- the volatile auxiliaries described herein can accelerate or slow the volatilization of volatile dyes.
- the volatilization aid is selected from one or more of the following volatile compounds:
- a linear indole hydrocarbon such as hexanthene, hydrazine, octopine or an isomer thereof, cyclohexanone, cycloheptadine, cyclopentanthene, naphthalene, anthracene, etc.
- a straight or branched chain or an aromatic or cyclic alcohol such as butanol, lauryl alcohol, tridecyl alcohol, tetradecanol, pentadecyl alcohol, stearyl alcohol, heptadecyl alcohol, stearyl alcohol, etc.;
- Linear or branched or aromatic or cyclic carboxylic acids such as maleic acid, fumaric acid, lauric acid, tridecanoic acid, myristic acid, hexadecanoic acid, palmitic acid, fatty acid, azelaic acid, twelve Azelaic acid, etc.;
- Amino acids such as aminobenzoic acid, leucine, phenylalanine, etc.
- Sulfone such as diphenyl sulfone, diphenyl disulfone, dibenzyl sulfone, dibutyl sulfone, etc.;
- the volatile dye layer further comprises one or more solvents.
- the solvent is not specifically limited in the present invention, and any solvent capable of achieving the object of the present invention can be used.
- the solvent is selected from the group consisting of water, hexane, cyclohexane, tetrahydrofuran, benzene, xylene, methanol, ethanol, isopropanol, 2-butanol, acetone, diethyl ether, methyl acetate, ethyl acetate, One or more of carbon tetrachloride, chloroform, methylene chloride, and dichloroacetam.
- the volatile dye, the volatilization aid, and the solvent are mixed and coated on the first substrate material layer to form a volatile dye layer.
- the coating method is not particularly limited as long as it can form a volatile dye layer uniformly.
- any known method of forming a coating such as spraying, printing, painting, or the like can be employed.
- the adsorbent material of the present invention is capable of irreversibly adsorbing a dye volatilized from the volatile dye layer, and more preferably, the adsorbent material adsorbs a volatile dye volatilized from the volatile dye layer.
- the speed is much higher than the volatilization rate of volatile dyes.
- the rate at which the volatile dyes are adsorbed is essentially only related to the rate of volatilization of the dye.
- the volatilization rate of the dye is only affected by the temperature, and is not affected by factors such as the hindrance of saturated/near saturated vapor generated by self-evaporation.
- the amount of volatilization of the dye is only affected by temperature and time, so the thermal history of the temperature-time sensor can be more accurately reflected.
- an adsorbent material having a small adsorption speed for example, an adsorbent material having a dye adsorption rate lower than that of the dye.
- the kind of the adsorbent material is not particularly limited, and any adsorbent material capable of achieving the object of the present invention can be used.
- the adsorbent material includes, but is not limited to, oily or water-based adhesives, commercial self-adhesive papers, and self-adhesive tapes.
- the materials of the first substrate material layer and the second substrate material layer are not particularly limited, and any substrate material capable of achieving the object of the present invention may be used.
- the first substrate material layer and the second substrate material layer may Use the same or different materials.
- the first substrate material layer together with the first release film layer seals the volatile dye layer; the second substrate material layer together with the second release film layer seals the adsorbent material layer.
- the first substrate material layer has a laminated structure, and a sealing layer, a self-adhesive layer and a third release film layer are sequentially included on the opposite side of the substrate material from the volatile dye layer. .
- the third release film layer is first peeled off, and the adhesive layer on the first substrate material layer is applied to the heat sensitive article.
- the first release film layer and the second release film layer are then peeled off, the adsorbent material layer is aligned with the volatile dye layer, and the adsorbent material layer and the volatile dye layer are sealed together on the heat sensitive article.
- the time-temperature indicator further comprises an isolation layer between the volatile dye layer and the layer of adsorbent material.
- the barrier layer Prior to use, the barrier layer is between the volatile dye layer and the first release film layer or between the adsorbent material layer and the second release film.
- the barrier layer can be used to adjust the rate of volatilization of volatile dyes in the volatile dye layer.
- the material of the separator is not specifically limited in the present invention, and any material that can achieve the object of the present invention can be used. Non-limiting examples include non-woven fabrics, nylon P6 mesh, nylon P66 mesh, and the like.
- the separator is separated from the layer of adsorbent material from the volatile dye layer.
- the barrier layer may be covered and then the first release film layer may be overlaid.
- the barrier layer is covered after the layer of adsorbent material is applied, and then the second release layer is covered.
- the method of the second aspect of the invention comprises the steps of:
- the self-adhesive layer and the adsorbent layer with a second release film layer, sealing the adsorbent material layer between the second substrate material and the second release film layer, thereby forming an adsorption functional layer .
- the first release film and the second release film are peeled off, the adsorption functional layer is aligned with the volatile dye layer, the second substrate material layer is closely attached to the heat sensitive article, and the volatile dye is The layer and the layer of adsorbent material are sealed together between the first substrate material layer and the second substrate material layer to form a time-temperature index of use.
- the first substrate layer has one or more transparent regions through which the color of the volatile dye layer can be measured or observed. More preferably, the first substrate layer itself is transparent, and the color of the volatile dye layer can be measured or observed through the transparent first substrate layer.
- the release film layer of the present invention is not limited in any way, and any release film layer capable of achieving the object of the present invention can be used. It will be appreciated that the release film layer of the present invention can be readily selected by those skilled in the art in light of the teachings herein.
- the first, second, third, and fourth release film layers do not function to adsorb a volatile dye.
- the materials used for the release film are widely selected, and non-limiting examples include: paper, wax paper, polymer film such as polyethylene, polyvinyl chloride, polypropylene, polystyrene, polyethylene terephthalate. Ester and the like.
- the related descriptions of the volatile dye layer, the adsorbent layer, the separator, the first release film layer, the second release film layer, and the reference color label involved in the embodiment are the same as or similar to the previous embodiment;
- the color difference or color depth of the volatile dye layer is observed or measured in the same or similar manner as the previous embodiment; in the present embodiment, the manner of determining whether the heat sensitive article is ineffective or deteriorated is the same as the previous implementation.
- the plan is the same or similar. All the same or similar parts will not be described here.
- a fourth aspect of the present invention provides a method of detecting a quality state of a heat sensitive article.
- the method of the fourth aspect of the present invention comprises the steps of:
- a difference between an activation energy of a volatilization process of the volatile dye layer and an activation energy of the heat sensitive article deterioration or failure process is within a predetermined range
- a layer of adsorbing material irreversibly absorbing the dye volatilized by the volatile dye layer
- a sealing film layer having a size larger than a size of the adsorbing material layer and the volatile dye layer, and the adsorbing a layer of material and a layer of volatile dye are sealingly attached to the heat sensitive article;
- the heat sensitive article after attaching the sealing film is subjected to actual disposal; Stripping the layer of adsorbent material;
- the volatile dye layer has a color difference C1 after the time t1 at the temperature T1;
- a layer of substrate material is attached to the heat sensitive article prior to attachment of the volatile dye layer.
- a barrier layer is attached between the volatile dye layer and the layer of adsorbent material.
- the method of the fourth aspect of the invention comprises the steps of:
- the adsorbent layer irreversibly adsorbs the dye volatilized in the volatile dye layer, and the difference between the activation energy of the volatile dye layer and the activation energy of the heat sensitive article during the deterioration or failure process The value is within the predetermined range;
- the heat sensitive article after attaching the sealing film is subjected to actual disposal
- the volatile dye layer has a color difference C1 after the time t1 at the temperature T1;
- a layer of substrate material is attached to the heat sensitive article prior to attachment of the layer of adsorbent material.
- a barrier layer is attached between the volatile dye layer and the layer of adsorbent material.
- the heat-sensitive article to which the layers are attached is subjected to a failure or deterioration process in advance, and a color difference meter is used to measure a color difference when the heat-sensitive article fails or deteriorates, and is recorded as an end point chromatic aberration.
- the actual color difference of the volatile dye layer is measured with a color difference meter, and the actual color difference is compared with the end color difference. If the actual color difference is greater than the end color difference, the heat sensitive item does not fail or deteriorate and is in a usable quality state. If the actual color difference is less than or equal to the end point color difference, the heat sensitive item has failed or deteriorated and is in an unusable quality state.
- a reference color label having an endpoint chromatic aberration is prepared with a non-volatile dye or a non-volatile pigment.
- visually observe the actual color of the volatile dye layer and compare the actual color to the reference color label. If the actual color is deeper than the reference color label, the heat sensitive item does not fail or deteriorate and is in a usable quality state. If the actual color is lighter or the same as the color of the reference color label, the heat sensitive item has failed or deteriorated and is in an unusable quality state.
- the reference color label may be independent of the indication function layer and the adsorption function layer.
- the reference color label is included in the indication function layer.
- a non-volatile dye or non-volatile pigment having an endpoint chromatic aberration is applied adjacent to the volatile dye layer after application of the volatile dye layer to form a reference color label.
- the reference color label may be disposed adjacent to the volatile dye layer in any possible manner, such as alongside the volatile dye layer, surrounding the volatile dye layer, and the like.
- a heat sensitive article deteriorates or fails over time T1 at a temperature T1
- the heat sensitive article to which the layers are attached is subjected to a treatment of time t1 at a temperature of T1, and the volatile dye layer after recording is disposed.
- the color difference as the endpoint color difference.
- the heat sensitive item is selected from the group consisting of a vaccine, a biological product, a biologically active sample, a pharmaceutical, a food or a drink.
- the heat sensitive article is an article that needs to be stored and/or transported at -40 ° C to 50 ° C, preferably an article that needs to be stored and/or transported at -30 ° C to 40 ° C, preferably Articles that need to be stored and/or shipped at -30 ° C to 30 ° C, preferably those that need to be stored and/or transported at -20 ° C to 20 ° C, preferably at -20 ° C to 10 ° C Items stored and/or transported, such as items that need to be stored and/or transported at -10 ° C to 10 ° C, such as items that need to be stored and/or transported at 0 ° C to 10 ° C, for example at 2 ° Items stored and/or transported at C to 8 °C.
- the heat sensitive articles include, but are not limited to: vaccines, such as heat labile vaccines, such as a small paralysis vaccine, typhoid vaccine, hepatitis B vaccine, etc., biological products, such as human immunoglobulin, anti-human T cell pig immunity A globulin, a biologically active sample, such as plasma, whole blood, serum, etc., a drug, such as a posterior pituitary injection, a stannous thiophene for injection, a food, such as fresh meat, fresh fish, etc., such as fresh Milk, dairy products, yogurt, pasteurized milk, etc.
- vaccines such as heat labile vaccines, such as a small paralysis vaccine, typhoid vaccine, hepatitis B vaccine, etc.
- biological products such as human immunoglobulin, anti-human T cell pig immunity A globulin
- a biologically active sample such as plasma, whole blood, serum, etc.
- a drug such as a posterior pituitary
- the activation energy of the volatile dye layer volatilization process and the quality of the heat sensitive article are changed.
- the difference in activation energy of the chemical or failure process is within a predetermined range, preferably the difference is in the range of ⁇ 10 kJ/mol, more preferably in the range of ⁇ 5 kJ/mol.
- the activation energy of the volatile dye layer volatilization process is 60 - 140 kJ/mol.
- the "activation energy of the volatilization process of the volatile dye layer" in the present invention means the apparent activation energy of the volatile dye layer volatilization process of the time-temperature indicator of the present invention in use.
- the volatile dye layer is solid or liquid in the range of 0 - 80 ° C, more preferably in the range of 0 - 50 ° C.
- the volatile dye is not particularly limited, and any volatile dye capable of achieving the object of the present invention can be used.
- the volatile dye is selected from the group consisting of an azo dye, an anthraquinone dye, a compound of formula I, or a combination thereof, wherein the compound of formula I has the following formula:
- R1 is selected from hydrogen, halogen, C straight or branched fluorenyl, such as methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, n-pentyl, isopentyl , neopentyl, n-hexyl, etc.; d_ 6 straight or branched decyloxy, such as methoxy, ethoxy, propoxy, isopropoxy, butoxy, sec-butoxy, tert-butoxy , pentyloxy, isopentyloxy, neopentyloxy, hexyloxy, etc.; -COR2, -COOR2;
- R2 is selected from hydrogen, d- 6 straight or branched fluorenyl, such as methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, n-pentyl, isopentyl, Neopentyl, n-hexyl, etc.; d- 6 straight or branched mercaptoamine such as methylamino, ethylamino, propylamino, isopropylamino, butylamino, sec-butylamino, tert-butylamino, pentylamino , isoamylamine, neopentylamino, hexylamine, and the like.
- fluorenyl such as methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl,
- the volatile dye is selected from the compounds of formula I above.
- the volatile dye layer further comprises one or more volatile auxiliary agents.
- the volatile auxiliary agent is not particularly limited in the present invention, and any volatile auxiliary agent capable of achieving the object of the present invention can be used.
- the volatile auxiliaries described herein can accelerate or slow the volatilization of volatile dyes.
- the volatilization aid is selected from one or more of the following volatile compounds:
- a linear indole hydrocarbon a branched anthracene hydrocarbon, a cyclic anthracene hydrocarbon or an aromatic hydrocarbon such as hexanthene, hydrazine, octopine or an isomer thereof, cyclohexanone, cycloheptadine, cyclopentanthene, naphthalene, anthracene, etc.;
- a straight or branched chain or an aromatic or cyclic alcohol such as butanol, lauryl alcohol, tridecyl alcohol, tetradecanol, pentadecyl alcohol, Palmitol, heptadecyl alcohol, stearyl alcohol, etc.;
- Linear or branched or aromatic or cyclic carboxylic acids such as maleic acid, fumaric acid, lauric acid, tridecanoic acid, myristic acid, hexadecanoic acid, palmitic acid, fatty acid, azelaic acid, twelve Azelaic acid, etc.;
- Amino acids such as aminobenzoic acid, leucine, phenylalanine, etc.
- Sulfone such as diphenyl sulfone, diphenyl disulfone, dibenzyl sulfone, dibutyl sulfone, etc.;
- the volatile dye layer further comprises one or more solvents.
- the solvent is not specifically limited in the present invention, and any solvent capable of achieving the object of the present invention can be used.
- the solvent is selected from the group consisting of water, hexane, cyclohexane, tetrahydrofuran, benzene, xylene, methanol, ethanol, isopropanol, 2-butanol, acetone, diethyl ether, methyl acetate, ethyl acetate, One or more of carbon tetrachloride, chloroform, methylene chloride, and dichloroacetam.
- the volatile dye, the volatilization aid, and the solvent are mixed and coated on the first substrate material layer to form a volatile dye layer.
- the coating method is not particularly limited as long as it can form a volatile dye layer uniformly.
- any known method of forming a coating such as spraying, printing, painting, or the like can be employed.
- the adsorbent material of the present invention is capable of irreversibly adsorbing a dye volatilized from the volatile dye layer, and more preferably, the adsorbent material adsorbs a volatile dye volatilized from the volatile dye layer.
- the speed is much higher than the volatilization rate of volatile dyes.
- the rate at which the volatile dyes are adsorbed is essentially only related to the rate of volatilization of the dye.
- the volatilization rate of the dye is only affected by the temperature, and is not affected by factors such as the hindrance of saturated/near saturated vapor generated by self-evaporation.
- the amount of volatilization of the dye is only affected by temperature and time, so that the thermal history of the heat sensitive article can be monitored more accurately.
- an adsorbent material having a small adsorption speed for example, an adsorbent material having an adsorption speed lower than that of the dye.
- the kind of the adsorbent material is not specifically limited, and any adsorbent material capable of achieving the object of the present invention can be used.
- the adsorbent materials include, but are not limited to, oily or aqueous self-adhesives, commercial stickers, self-adhesive tapes, and the like.
- the materials of the first substrate material layer and the second substrate material layer are not particularly limited, and any substrate material capable of achieving the object of the present invention can be used.
- the first substrate material layer and the second substrate material layer may use the same or different materials.
- a fifth aspect of the invention provides a compound having the structure of formula I: among them,
- Rl is selected from hydrogen; halogen; C straight or branched fluorenyl, such as methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, n-pentyl, isopentyl , neopentyl, n-hexyl, etc.; d_ 6 straight or branched decyloxy, such as methoxy, ethoxy, propoxy, isopropoxy, butoxy, sec-butoxy, tert-butoxy , pentyloxy, isopentyloxy, neopentyloxy, hexyloxy, etc.; -COR2; -COOR2, etc.;
- R2 is selected from hydrogen; d_ 6 straight or branched chain alkyl group, e.g., methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, n-pentyl, isopentyl, Neopentyl, n-hexyl; d- 6 straight or branched mercaptoamine, such as methylamino, ethylamino, propylamino, isopropylamino, butylamino, sec-butylamino, tert-butylamine, pentyl Amine, isoamylamine, neopentylamino, hexylamine; and the like.
- alkyl group e.g., methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-but
- R1 is selected from the group consisting of hydrogen, -COR2, -COOR2;
- R2 is selected from hydrogen; d_ 4 straight or branched chain alkyl group, e.g., methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl; d_ 4 straight or branched chain alkyl Amino group, for example, methylamino, ethylamino, propylamino, isopropylamino, butylamino, sec-butylamino, tert-butylamino, pentylamino, isoamylamino, neopentylamino, hexyl Amine; and so on. .
- R1 is selected from hydrogen, -COOH, -COOCH 3, - COOCH 2 CH 3, -COOCH 2 CH 2 CH 3, -COOCH (CH 3) 2 and the like.
- R1 is respectively -COOCH 3, -COOCH 2 CH 3 and -COOCH (CH 3) 2, the compound may be abbreviated as a dye A, dye B and dye C.
- the term "deterioration" means that a heat-sensitive item loses its original quality state or fails to meet specified quality requirements after a certain storage and transportation time.
- a heat-sensitive item loses its original quality state or fails to meet specified quality requirements after a certain storage and transportation time.
- it often deteriorates due to heat or other factors.
- the higher the storage and transportation temperature the faster the metamorphic speed.
- Heat sensitive items usually have a specified storage and transportation temperature and therefore have a certain shelf life or shelf life. If the storage of heat sensitive items When the operating temperature exceeds the specified storage and transportation temperature, the metamorphic speed is accelerated and the shelf life is shortened.
- many foods or medicines only indicate their specified storage and transportation temperatures and shelf life, but whether the actual storage and transportation temperature during storage and transportation has been kept below the specified storage and transportation temperature is not known.
- the rate of dye volatilization of the volatile dye layer can be made close to or consistent with the rate of change of the quality of the heat sensitive article, i.e., the volatile dye
- the color fading rate of the layer is similar to or consistent with the rate of change of the quality of the heat sensitive article, and the quality change of the heat sensitive article can be accurately monitored.
- the color difference of the time-temperature indicator of the present invention reaches or is less than the end color difference, that is, its color is equal to the end point color or lighter than the end point color, it indicates that the heat sensitive item has deteriorated, although the storage time of the heat sensitive item may still be Did not meet the stated shelf life. Therefore, by using the time-temperature indicator of the present invention or the method of monitoring the quality state of the heat sensitive article of the present invention, the quality state of the heat sensitive article can be more accurately monitored, and the use of the heat sensitive article can be ensured.
- the term "failure” means that a heat-sensitive item loses its original performance or fails to meet specified quality requirements after a certain period of storage and transportation.
- a vaccine should be prescribed for its activity before use, and after storage, if the activity does not meet the prescribed standards, the vaccine can be considered to have expired and cannot be used.
- the activity after storage and transportation of the vaccine is specified to be more than 90%, then when the activity reaches 90% or less, it is considered to have failed.
- Different heat sensitive items have different failure criteria.
- the time-temperature indicator of the present invention should be used to determine the end point chromatic aberration according to the failure criteria of different heat sensitive articles.
- the failure process of heat sensitive items is closely related to the temperature of their storage and transportation process.
- the failure process of the heat sensitive article is accelerated, that is, the failure rate is increased, and the shelf life is shortened.
- many heat sensitive items only specify their storage and storage temperatures and shelf life, but not their thermal history. Whether the storage and transportation temperature during storage and transportation exceeds the specified storage and transportation temperature is unknown to the user.
- the rate of dye volatilization of the volatile dye layer can be made close to or coincident with the failure rate of the heat sensitive article, i.e., the volatile dye layer.
- the rate of color fading is similar to or consistent with the rate of failure of heat sensitive items, allowing accurate monitoring of the failure process of heat sensitive items.
- the volatilization speed of the volatile dye layer increases, and the color fading rate increases, so the time to reach the end color difference or the end color is shortened, which indicates that the shelf life of the heat sensitive article is correspondingly shortened.
- the color difference of the time-temperature indicator of the present invention reaches or is less than the end color difference, that is, the color is equal to the end point color or is lighter than the end point color, it indicates that the heat sensitive item has failed, although the storage time of the heat sensitive item may still be Did not meet the stated shelf life.
- using the time-temperature indicator of the present invention or the method for monitoring the failure of the heat sensitive article of the present invention can more accurately monitor the failure process of the heat sensitive article, more accurately determine whether the heat sensitive article is ineffective, and ensure the heat sensitive article. Safe to use. This is of particular importance in the fields of vaccines, pharmaceuticals and food.
- activation energy of a heat sensitive article failure or deterioration process refers to a heat sensitive item at log k : - ⁇ H- log A
- the activation energy E in the Arrhenius equation during failure or metamorphism refers to the apparent activation energy of the heat sensitive article during actual failure or deterioration.
- the inventors of the present invention believe that the failure or deterioration process of heat sensitive articles obeys the Arrhenius equation.
- the heat sensitive article is tested for failure or deterioration rate of the heat sensitive article at at least two different temperatures, preferably at more than 5 temperatures, more preferably at more than 10 temperatures. Then perform a logk as a function of temperature T in a Cartesian coordinate system, which is a straight line or an approximate straight line. From the slope of the line and the intersection of its extension line and the coordinate axis, the apparent activation energy and constant A during the failure or deterioration of the heat sensitive article can be obtained.
- activation energy of the volatile process of the volatile dye layer means that the volatile dye layer is in the volatilization process log k : - ⁇ + log A
- the activation energy E in the Arrhenius equation 2303 HT refers to the apparent activation energy of the volatile dye layer of the time-temperature indicator of the present invention during actual volatilization.
- the time-temperature indicator of the present invention is used to measure the rate of volatilization of the volatile dye layer at at least two different temperatures, preferably at more than 5 temperatures, more preferably at more than 10 temperatures.
- a curve of logk as a function of temperature T is then made in a Cartesian coordinate system, which is a straight line or an approximate straight line. From the slope of the line and the intersection of the extension line and the coordinate axis, the apparent activation energy and constant A of the volatile dye layer of the time-temperature indicator of the present invention during volatilization can be obtained.
- the apparent activation energy E and the constant A of the volatile dye layer during volatilization can be controlled and made sensitive to heat.
- the apparent activation energy E and the constant A during the failure or deterioration of the article are close or even uniform, so that the rate of dye evaporation of the volatile dye layer is close to or even consistent with the rate of deterioration or failure rate of the heat sensitive article, thereby The color change of the layer accurately monitors the thermal history of the heat sensitive item.
- E or Ea is used to mean the activation energy as defined herein.
- chromatic aberration refers to a numerically represented color measured with a color difference meter.
- L*a*b* color space also known as CIELAB.
- L* represents luminance
- a* and b* are chromaticity coordinates.
- a* and b* indicate the color direction
- +a* indicates the red direction
- -a* indicates the green direction
- +b* indicates the yellow direction
- -b* indicates the blue direction.
- the center is colorless, and the color saturation increases as the a* and b* values increase and move out of the center.
- Color difference meters are widely used to accurately measure chromatic aberrations.
- the color difference can be expressed as a single value, represented by AE*ab, which indicates the magnitude of the color difference, but does not indicate where the color is different.
- AE*ab is defined as follows:
- the measured AE*ab relative to the white standard when the AE*ab is 10 or lower, although the color difference may decrease as the dye evaporates, the human eye barely observes this change. Therefore, it is possible to determine the value of AE*ab of 10 or more as the end point chromatic aberration, so that the user can directly compare the color depth by visual inspection. For example, you can set the endpoint color difference to any value such as AE*ab equal to 10, 15, 20, or 25.
- the time-temperature of the present invention can be readily determined based on a predetermined endpoint color difference value, an actual measured velocity of the volatile dye layer, and a corresponding color fade rate.
- the initial color difference C0 of the indicator when the AE*ab is 10 or lower, although the color difference may decrease as the dye evaporates, the human eye barely observes this change. Therefore, it is possible to determine the value of AE*ab of 10 or more as the end point chromatic aberration, so that the user can directly compare the color depth by visual inspection. For example,
- the time-temperature indicator can be made to have the same color difference after the same process as the heat sensitive article fails or deteriorates.
- the predetermined color difference value for example, AE*ab is equal to 10, 15, 20, 25, and the like.
- the initial color difference C0 of the volatile dye layer should be sufficiently large when comparing the actual color difference and the end color difference by visual observation to ensure that the color of the reference color label having the end color difference is within the range distinguishable by the human eye. That is, the end color difference value should be 10 or more, for example, 10, 15, 20, 25 or more.
- the time-temperature indicator of the present invention can use volatile dyes of any color.
- the description of "the process of making the time-temperature indicator of the present invention through the same process as the heat sensitive article fails or deteriorates" or the like has the following meaning: It is assumed that the heat sensitive article fails after T1 time at the T1 temperature or Metamorphism, while not failing or deteriorating before time t, causes the time-temperature indicator of the present invention to be placed at T1 for a time of t1. For example, if a vaccine has a shelf life of -8 ° C for two years, the time-temperature indicator of the present invention can be placed at -8 ° C for two years to determine its endpoint color or endpoint color.
- the endpoint chromatic aberration or endpoint color can be determined according to methods known to those skilled in the art or specific accelerated or experimentally prescribed for heat sensitive articles.
- the methods described in the relevant textbooks for example, see the Department of Physical Chemistry, Tianjin University, Physical Chemistry, People's Education Press, 1979; Sudsen, et al., Physical Pharmacy, Chemical Industry Press, Beijing, 2004; Pharmacy, Third Edition, People's Medical Publishing House, Beijing, 1994, etc., related to substances such as drug stability.
- the time-temperature indicator of the present invention can be placed at 25 ° C for 8 weeks.
- the color difference of the volatile dye layer was measured as the end point chromatic aberration. This method allows for faster determination of the endpoint chromatic aberration or endpoint color of the time-temperature indicator of the present invention compared to two years at 2-8 °C.
- Arrhenius equation 2303 which includes parameters such as activation energy E , rate constant k, absolute temperature T, and the like.
- reference to "on a heat sensitive item” or “on one or more areas on a heat sensitive item” in the present invention includes “on a package of heat sensitive items” or “in heat sensitive”"One or more areas on the package of the item”.
- a package of heat sensitive items or “in heat sensitive””
- One or more areas on the package of the item For example, on the outer surface of a primary package (or a minimum package, such as an ampoules) for vaccines, pharmaceuticals, etc., such as a glass bottle of vaccine or a glass bottle on the outer surface of a drug, or a plasma packaged in a soft bag, The soft bag of milk is on the outer surface. There is no limit to the location of the area, but it should be compared.
- the size of the region is also not limited, but for the purpose of the present invention, 0.2 to 20 cm 2 is usually preferred, more preferably 0.5 to 5 cm 2 , still more preferably 0.5 to 4 cm 2 , still more preferably 0.5 to 2.5 cm 2 , more It is preferably 0.5 to 1 cm 2 .
- the reference color label or reference color layer is prepared using a non-volatile dye or pigment.
- the type of the volatile dye or pigment is not particularly limited in the present invention, and any commercially available non-volatile dye may be used as long as the color or chromatic aberration prescribed by the present invention can be achieved.
- a heat sensitive article "failed” refers to whether the article is within the quality requirements specified by its expiration date. For example, taking the content of the active ingredient as an example, if a certain drug standard stipulates that the amount of the active ingredient should be more than 90% of the labeled amount, it can be judged according to whether the active ingredient of the drug is above 90% after being stored and/or transported, for example. "Is it invalid", for example if the active ingredient is >90%, it does not expire, if the active ingredient ⁇ 90% indicates failure.
- CN101652645A discloses a time-temperature indicator comprising a time temperature indicator comprising: at least one metal layer or metal containing layer, and at least one directly contacting the metal layer or the metal containing layer a doped polymer layer, wherein the dopant is an acid, a base or a salt or a photolatent acid or a photolatent base, the dopant being added to the polymer, and/or at least one polymer layer, wherein The polymer is functionalized with an acidic or latent acidic or basic or latent basic group; or comprises a time temperature indicator comprising at least one polymer layer comprising metal particles and photolatent acid or photolatency A base, or at least one polymer layer, the layer comprising metal particles, wherein the polymer is functionalized with a latent acidic or latent basic group.
- CN1914509A discloses a time temperature indicator comprising at least one indicator compound in the form of a first isomer, in which no attachment to the indicator compound occurs in the isomerization reaction
- the indicator compound is converted to the indicator compound in a second isomeric form in a time- and temperature-dependent manner, wherein the formation of the second isomer form is Detected by monitoring the physical characteristics of the indicated compound.
- the time-temperature indicator of the present invention is completely different from the existing time-temperature indicator in principle, as well as in structure and composition, and the time-temperature indication of the present invention.
- the machine is very beneficial in terms of production, cost, ease of use, and so on.
- the entire contents of the above-identified patent documents are incorporated herein by reference.
- a "sealant layer" in the functional layer or layer of adsorbent material prevents migration or even evaporation of the dye after it has penetrated through the layer of substrate material.
- the present invention contemplates the use of a substrate material layer that minimizes penetration and migration, it is preferred for the purposes of the present invention to apply a sealant layer on the side of the substrate material layer opposite the dye layer.
- the material of the sealant or sealant layer is broadly selectable, and non-limiting examples include: Commercially available conventional glue.
- the “seal film layer” in the indicating functional layer prevents migration or even evaporation of the dye after it penetrates through the substrate material layer.
- the material of the sealing film or the sealing film layer can be widely selected, and non-limiting examples include polymer films such as polyethylene, polyvinyl chloride, polypropylene, polystyrene, polyethylene terephthalate, and the like. .
- the "sticker layer” in the indicator functional layer or the adsorption functional layer can provide adhesion and sealing for the corresponding material layer.
- the “sticker layer” in the two layers indicating the functional layer and the adsorption functional layer may be the same or different, but it is expected that the "adhesive layer” in the adsorption functional layer has good sealing performance and can be used when the indicator of the present invention is used.
- the substrate material layer is tightly bonded to the heat sensitive article to form an enclosed space that avoids dye leakage.
- the material of the self-adhesive or self-adhesive layer can be widely selected, non-limiting examples include oily or water-based stickers, commercial Dry adhesive tape and self-adhesive tape.
- the compound of formula I can be prepared using methods known to those skilled in the art.
- a compound of the formula I wherein R1 is a hydrogen compound (which may be referred to as dye H in the present invention) may be substituted by a halogenation reaction, a thiolation reaction or an acylation reaction, followed by hydrolysis or alcoholysis.
- the group is converted to a halogen, d- 6 straight or branched fluorenyl group, a linear or branched alcohol, a group -COR2, -COOR2, etc., wherein R2 is as described herein.
- the invention utilizes the volatile matter of the substance to make a time-temperature indicator, and through a volatilization-adsorption process, achieves the desired color change effect.
- the structure of the time-temperature indicator and its operating principle in accordance with one embodiment of the present invention are schematically illustrated in Figures 1, 2A and 2B.
- a time-temperature indicator according to an embodiment of the present invention, which is composed of two parts, a part indicating the functional layer 1, and b part being the adsorption functional layer 2, the two parts being separately fabricated and separately stored. Shipped, used together, and pasted onto the container or packaging surface of the heat sensitive item to be monitored.
- a layer of sealant 14 is printed on the underside of the substrate material layer 10, and a sealing film 13 is applied underneath to prevent the volatile dye layer 15 from diffusing downward.
- a layer of self-adhesive 12 is printed on the underside of the sealing film 13 and protected by a release film layer 11. If the sealing effect of the sealant is good enough, the sealing film 13 may not be used. If the substrate material layer 10 itself has a sufficient sealing effect, the sealant layer 14 and the sealing film 13 may not be used. It will be appreciated that the self-adhesive layer 12 is optional.
- the volatile dye layer 15 of the present invention Printing a layer of colored functional material having specific volatility at a functional portion above the substrate material layer 10 (i.e., volatile dye) as a volatile dye layer, forming the volatile dye layer 15 of the present invention, the color of the dye layer 15 (in the figure, dark blue) and the substrate material layer 10 or the peripheral printed reference color layer 16 (In the picture, light blue) shows a large contrast.
- the rate of volatilization of the volatile dye used and its temperature effect are as consistent as possible with the indicated rate of deterioration or failure of the heat sensitive article and its temperature effect.
- the release film layer 17 acts as a seal and has no adsorption to the volatile dyes used, and the sealing performance ensures that the functional layer can be stored and transported at room temperature.
- the upper surface of the substrate material layer 20 can be printed with appropriate product information (for example, the type of heat sensitive article to which the TTI is applied) or indicator usage information (for example, when it is necessary to use an indicator to determine whether the heat sensitive article is ineffective) How to operate the information).
- product information for example, the type of heat sensitive article to which the TTI is applied
- indicator usage information for example, when it is necessary to use an indicator to determine whether the heat sensitive article is ineffective
- an isolation layer 24 may be formed on the side of the adsorbent layer 21 (i.e., away from the substrate material layer 20).
- the spacer layer may also be located between the dye layer 15 and the release film layer 17.
- the use and use of the time-temperature indicator shown in Figure 1 is depicted.
- the two laminated portions of the indicating functional layer 1 and the adsorption functional layer 2 respectively produced and stored are combined: the release film 11 indicating the bottom of the functional layer 1 is peeled off first, and the indicating functional layer 1 is pasted to The surface of the container or package 3 of the heat sensitive article to be monitored; the release film 17 of the functional layer 1 and the release film 23 of the adsorption functional layer 2 are peeled off, and the portion of the adsorption functional layer 2 is aligned with the indicator functional layer 1 to be pasted. Monitor the surface of the heat sensitive container or package 3 .
- a preferred embodiment is that the shape and size of the layer of adsorbent material 21 is the same as or slightly larger than the shape and size of both the volatile dye layer 15 and the reference color layer 16, such that the adsorbent layer 21 and any of the layers are as shown.
- the selected spacer layer 24 completely covers both the volatile dye layer 15 and the reference color layer 16, and the sticker layer 22 on the periphery of the adsorbent layer 21, together with the adhered substrate material layer 20, can be closely adhered to heat sensitive On the packaging container 3 of the article, the substrate material layer 20, the adhesive layer 22, and the packaging container 3 of the heat sensitive article are formed into a space in which the remaining functional layers can be sealed.
- the choice of two functional layer substrate materials and self-adhesive materials ensures that the functional layer will be firmly bonded to the product container or packaging surface, while the adhesive functional layer has a suitable degree of adhesion when bonded, effectively sealing the functional layer printing
- the volatile dyes, and can be stripped, the stripping process does not adversely affect the indicator functional layer.
- the remaining dye (blue) in the volatile dye layer 15 and its surrounding reference color layer 16 can still show significant color difference (Fig. 2A) C ), that is, the color of the volatile dye layer 15 is darker than the reference color layer 16, reflecting that the indicated product is still valid and usable.
- the heat-sensitive material of the volatile dye layer 15 is completely volatilized (d in FIG.
- the remaining dye (light blue or colorless) in the volatile dye layer 15 is more than the surrounding
- the color of the reference color layer 16 is closer or shallower (e in Figure 2A), i.e., the color of the volatile dye layer 15 is comparable or lighter than the reference color layer 16, indicating that the product being monitored may be overheated Deterioration or failure.
- Fig. 2B is a view showing a process of changing the volatile dye layer 15 during use in a direction perpendicular to the time temperature indicator according to an embodiment of the present invention.
- the invention discloses a time-temperature indicator made by using the volatile energy of the material, and realizes a change of the color of the functional part of the indicator through a volatilization-adsorption process, and shows whether the product using the time-temperature indicator is excessively heated or over-extended. Deterioration or failure.
- the shape of the volatile dye layer 15 is square, as shown in FIG. 2B, a starting point state, a dark blue square, and the color of the volatile dye layer is in sharp contrast with the reference color layer, and the reference color layer See Fig. 2B (a), which is a light blue circle, corresponding to the reference color layer 16 of Fig. 1, which may be a substrate or a printed reference color layer.
- the color depth of the reference color layer 16 is constant, and the color of the volatile dye layer 15 is lightened by the volatilization of the dye, and the shallower speed is affected by the temperature.
- the effect is that the volatile dye layer 15 volatilizes at a constant rate even at the storage and temperature specified by the heat sensitive article.
- the volatile dye layer 15 will gradually become lighter due to the slow evaporation of the dye, and the color will be Deeper or deeper than the reference color layer 16, indicating that the drug is still acceptable after 2 years storage at 2-8 ° C; after the storage time continues to prolong, the volatile dye layer 15 will continue to lighten due to the continued volatilization of the dye. Thereafter the color will be substantially closer or lighter than the reference color layer 16, indicating that the drug has expired.
- the volatile dye remaining after peeling off the adsorption film can still show a significant color difference with the surrounding reference color layer, as shown in (b) of FIG. 2B, that is, the intermediate point. State, the blue square is darker than the reference light circle, reflecting that the indicated product is still available.
- the color of the original volatile dye layer 15 is close to the color of the peripheral reference color layer 16 ((c) in Fig. 2B, the end state) or shallower. ((d) in Figure 2B, crossing the end state), indicating that the product being monitored may have deteriorated or failed due to excessive heat.
- the color difference meter is used to measure the functional part of the indicator at different temperatures (for example, 5 ° C, 10 ° C, 25 ° C, and/or 37 ° C, etc.) The change in color difference over time gives the indicator's color change speed and its temperature effect.
- Color changes can be digitized using a colorimeter.
- a colorimeter When using a colorimeter to measure color changes, first define a color space such as L*a*b* color space (also known as CIELAB color space).
- L* represents brightness
- a* and b* are chromaticity coordinates, indicating color direction
- +a* means red direction
- -a* means green direction
- +b* means yellow direction
- -b* means In the blue direction
- the center is colorless.
- the values of a* and b* increase and move out of the center, the color saturation increases.
- the color difference can be represented by a single value: Among them, AL* is the change of brightness, Aa* is the change along the red-green color axis, and Ah* is the change along the yellow-blue color axis.
- a color difference meter such as the Minolta CR-310 Chroma Meter
- the color difference can be quantified, and the color change function of the produced time-temperature indicator can be evaluated.
- the color difference measurement is based on a white substrate such as A4 paper.
- the color difference AE* ab ⁇ 10 the color is more or less close to the color of the substrate, and the further decrease of the color difference is not significant to the human eye, so during the evaluation process.
- the endpoint color difference can be defined according to the actual situation.
- dye A as a time-temperature indicator for volatile dyes, 2% dye A (solvent is ethyl acetate, about 200 ug per square centimeter of dye A) is used as a functional indicator layer on plain A4 paper.
- a commercially available self-adhesive paper capable of effectively adsorbing dye A is placed on top of the dye A, and the self-adhesive is applied to the dye layer as a layer of adsorbent material, and the dye-impermeable sealing film is used to indicate the functional layer and the adsorption functional layer. Seal and place the sealed sample at 25 n C. After placing a specific time, observe the color of the record indicator.
- Figure 3 is a color record of the indicator after being placed for 0-105 days at 25 n C constant temperature. After the dye A is completely volatilized, almost no trace of dye remains in the naked eye, indicating that the functional part almost returns to the original color of the white paper.
- Example 2
- 4A and 4B are time temperatures of the method of Reference Example 1, using dye A as a volatile dye
- the discoloration time and velocity of the indicator can be obtained, and then the Arrhenius equation can be used to derive the activation energy corresponding to the change process is about 97.4 kJ/mol (Fig. 5).
- the characterization parameters of the temperature effect of the indicator color change process are obtained.
- This activation energy can well cover the inactivation activation energy range of 73.6-109 kJ/mol of the polio vaccine reported in the literature, and can also cover the activation activation energy range of some other vaccines.
- FIG. 6 is a label designed for a hepatitis B vaccine using dye A.
- the color change response of the TTI of the present invention is almost identical to the change in activity of the vaccine.
- Example 3
- the total time of discoloration of the indicator can be adjusted, which can be regulated by adjusting the amount of ink or the concentration of ink during the printing process.
- Fig. 7 is a graph showing the initial color difference of an indicator obtained by using the dye A as a volatile dye, the method of the embodiment 1, using different ink concentrations and the same amount of ink, and the color changing process at the same temperature. The time the indicator reaches the end point is linear with the amount of volatile dye printed per unit area ( Figure 8).
- Example 4
- Figure 9 is a method of Reference Example 1, using three compounds of the formula I (dyes A, B, C, respectively) as volatile dyes for time-temperature indicators, and the color difference of the indicator produced at 50 n C over time The changes are very different.
- Figure 10 is a method of Reference Example 1, which uses a cyclohexanide, a chloroform, a methyl acetate, an ethanol, and an ethyl acetate as a solvent to print a dye as a volatile dye layer, respectively, and the color difference of the indicator at the same temperature is Time changes.
- FIG 11 is a view showing the relationship between the change in color difference at 80 n C and the time at 80 n C by adding an appropriate amount of binder EC (i.e., ethyl cellulose) to the organic solution of dye A in the method of Reference Example 1.
- binder EC i.e., ethyl cellulose
- the time-temperature indicator's color change speed and its temperature effect can be adjusted by selecting different adsorbent materials.
- Figure 12 is a method of Reference Example 1, in which dye B is used as a volatile dye, and three different adsorbent materials are selected (materials 1, 2, and 3 are commercially available self-adhesive papers, commercially available water-based self-adhesive coatings). Covering A4 paper, commercially available oil-based self-adhesive coated A4 paper) The time-temperature indicator is produced. Under the same temperature environment, the indicator function layer color difference of the indicator changes significantly with time.
- the inventors have surprisingly discovered that by using the volatile matter of a substance to achieve a color change by a volatilization-adsorption process, it is possible to very simply and effectively indicate whether the product to be monitored may deteriorate or fail due to excessive heat. .
- formulating volatile dyes or other volatile materials with appropriate volatilization rates and activation energies if necessary, formulating materials containing auxiliaries can produce a personalized time-temperature indicator that fully reflects the thermal stability of the indicated product.
- the product By forming a layer of adsorption function layer on the indicator above which can effectively adsorb the heat sensitive material, and effectively sealing the indicator function layer and the adsorption function layer of the indicator, the product can be prevented from contaminating the product and its packaging after volatilization, and the indicator is protected.
- the functional parts are not subject to external pollution.
- the adsorption process is used to artificially set the diffusion process of the heat-sensitive material after volatilization, that is, to become the adsorption process of the adsorption layer, thereby effectively reducing the apparent volatilization speed of the heat-sensitive material by the non-temperature factor in the product storage and transportation environment, thereby improving Product use The accuracy.
- the indicator is designed to be separately fabricated and sealed for storage, and the indicator can be stored and transported at room temperature when the indicator is affixed to the product container or the surface of the package.
- time-temperature indicator prepared according to the technical solution or concept of the present invention which is formed by using equivalent transformation or equivalent replacement, or using different processes or formulations, falls within the scope of the present invention.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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US14/127,410 US9618398B2 (en) | 2011-06-29 | 2012-06-26 | Time-temperature indicator and monitoring method for monitoring quality state of thermally sensitive article |
KR1020147002602A KR101568099B1 (ko) | 2011-06-29 | 2012-06-26 | 열 민감성 물품의 품질 상태를 모니터링하기 위한 시간-온도 지시기 및 모니터링 방법 |
EP12803738.9A EP2728328B1 (en) | 2011-06-29 | 2012-06-26 | Time-temperature indicator and monitoring method for monitoring quality state of thermally sensitive article |
BR112013033371-5A BR112013033371B1 (pt) | 2011-06-29 | 2012-06-26 | Combinação e método de monitoração para a monitoração do estado de qualidade de um artigo termicamente sensível |
JP2014517420A JP5779715B2 (ja) | 2011-06-29 | 2012-06-26 | 感熱物品の品質状態をモニタリングするための時間−温度インジケータおよびモニタリング方法 |
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CN201110178976.4 | 2011-06-29 |
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EP (1) | EP2728328B1 (zh) |
JP (1) | JP5779715B2 (zh) |
KR (1) | KR101568099B1 (zh) |
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KR101759900B1 (ko) * | 2016-01-15 | 2017-07-20 | 동국대학교 산학협력단 | Rfid 융합 전지형 tti |
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DE102016005078A1 (de) | 2016-04-27 | 2017-11-02 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Vorrichtung und Verfahren zur Temperaturüberwachung einer kryokonservierten biologischen Probe |
DE102016005070A1 (de) | 2016-04-27 | 2017-11-02 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Vorrichtung und Verfahren zur Temperaturüberwachung einer kryokonservierten biologischen Probe |
DE102016005075A1 (de) | 2016-04-27 | 2017-11-02 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Verfahren und Vorrichtung zur Temperaturüberwachung einer kryokonservierten biologischen Probe |
DE102016005133A1 (de) | 2016-04-27 | 2017-11-02 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Verfahren und Vorrichtung zur Temperaturüberwachung einer kryokonservierten biologischen Probe |
EP3541591B8 (en) * | 2016-11-18 | 2023-07-05 | Husky Injection Molding Systems Ltd. | Molded article, container and a method for the molding and recycling thereof |
WO2018224000A1 (en) * | 2017-06-07 | 2018-12-13 | Nano And Advanced Materials Institute Limited | A system for quality monitoring of temperature sensitive product and method for manufacturing thereof |
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KR101568099B1 (ko) | 2015-11-10 |
CN102853946A (zh) | 2013-01-02 |
JP5779715B2 (ja) | 2015-09-16 |
BR112013033371A2 (pt) | 2017-01-17 |
BR112013033371B1 (pt) | 2020-10-06 |
EP2728328A1 (en) | 2014-05-07 |
US20140119402A1 (en) | 2014-05-01 |
EP2728328A4 (en) | 2015-04-01 |
KR20140043462A (ko) | 2014-04-09 |
US9618398B2 (en) | 2017-04-11 |
JP2014521054A (ja) | 2014-08-25 |
EP2728328B1 (en) | 2018-08-15 |
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