CN104034441A - Temperature sensing material for cold chain tracking - Google Patents
Temperature sensing material for cold chain tracking Download PDFInfo
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- CN104034441A CN104034441A CN201410241003.4A CN201410241003A CN104034441A CN 104034441 A CN104034441 A CN 104034441A CN 201410241003 A CN201410241003 A CN 201410241003A CN 104034441 A CN104034441 A CN 104034441A
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Abstract
The invention discloses a temperature sensing material for cold chain tracking. The temperature sensing material comprises a color developing agent and an indicator, wherein the indicator is melted at a specific temperature to enable the color of the color developing agent to change. The temperature sensing material for cold chain tracking is at least capable of realizing tracking management on a cold chain.
Description
Technical field
The present invention relates to a kind of intellectual material, relate in particular to a kind of temperature-sensitive material of following the trail of for cold chain.
Background technology
The management of Food Cold Chain process safety is the extremely important ring in food safety management, is also the most unmanageable rings of all relevant issues of food security quality.
Food Cold Chain management relates to manufacturing enterprise, loglstics enterprise, carrier, sale enterprise, when any one chain of cold chain all to guarantee no problem; When any one link goes wrong, be difficult to be reviewed timely, often in food consumption, the problem such as occurred freshness date or thaw, certain link before just knowing is out of joint, but still is difficult to location.Such as: when consumer has bought a box and thaws and return the food freezing in supermarket, or actually being also difficult to review this food, supermarket producing have a power failure logistics company storage temperature problem or have a power failure or expose and at high temperature cross long-time and thaw or supermarket self-management is improper or taken non-freeze space by consumer of storehouse on haulage vehicle in unloading process, so many link cannot be determined the position going wrong, and is also just difficult to effectively improve and promote.What this was from the reviewing of the reviewing of supplier, date of manufacture, raw materials for production and adjuvant is reviewed, production run administration of health, production process technology management, sales section management are maximum is different, is difficult to exactly trace back to single responsible party.
Meanwhile, another difficult point of Cold-chain management is, needs Whole Course Management, and remarkable be the management of state.Different from other commodity, after a box food thaws and returns and freeze, without some special detection meanss, only according to naked eyes, be difficult to distinguish, this makes in each handshaking of logistics link, if there is crossing, thaws and returns the situation of freezing, and commodity take over party is difficult to find in time this problem.Return the food freezing and there is very strong camouflage.
Meanwhile, during thawing, the growth of bacterium colony is rapid, may also not reach the degree of food spoilage; After consumer buys, thawing and the preparatory stage before edible, bacterium colony regrows, far be shorter than in the fresh-keeping cycle marking on label, breeding arrives harmful state, can say, the risk of Cold-chain management, at cold chain itself, be sometimes difficult to discover, in " latent period ", even meet various detection indexs, after may reaching the pool period of a year, this Commodity Flow leads in consumer's hand, and in consumptive link outburst, this specific character has increased difficulty and the risk of food safety trace back.
Compare with medicine cold chain, Food Cold Chain also has large, the dispersed strong feature of a quantity, comprises that oneself refrigerator of consumer all becomes " last kilometer " difficult problem in cold chain link, and this all gives supervision difficulty.
Above four large difficult points are combined, party responsible is many, camouflage property is strong, latent period long, it is extensive to disperse, the characteristic of the outburst of batch that simultaneous food-safety problem may occur, similar acute infectious disease that harmfulness is large, makes the maximum difficult point that food safety risk is controlled that becomes of Cold-chain management.Can say, the safety management of Food Cold Chain and tracing technology, be the most unmanageable link in whole food security, is to rely on separately the existing information means of reviewing to be difficult to the link realizing.
Therefore, need to provide a kind of temperature-sensitive material of following the trail of for cold chain.
Summary of the invention
For this reason, the present invention proposes a kind of novel temperature-sensitive material of following the trail of for cold chain of at least a portion that can address the above problem.
According to an aspect of the present invention, provide a kind of temperature-sensitive material of following the trail of for cold chain, it is characterized in that: described temperature-sensitive material comprises developer and indicator,
Wherein, described indicator melts under specified temp, and the color of described developer is changed.
Alternatively, according to temperature-sensitive material of following the trail of for cold chain provided by the invention, it is characterized in that: described developer comprises anhydrous cupric sulfate, described indicator forms or generates aqueous water under specified temp, thereby the color of described anhydrous cupric sulfate is changed.
Alternatively, according to temperature-sensitive material of following the trail of for cold chain provided by the invention, it is characterized in that: described specified temp comprises-10 ℃, and described indicator comprises the ice crystal of sodium chloride solution.
Alternatively, according to temperature-sensitive material of following the trail of for cold chain provided by the invention, it is characterized in that: described specified temp comprises 0 ℃, and described indicator comprises ice crystal, described ice crystal is by ice cube, to be ground and formed under the environment temperature lower than 0 ℃.
Alternatively, according to temperature-sensitive material of following the trail of for cold chain provided by the invention, it is characterized in that: the diameter of described ice crystal is 0.5 millimeter-1 millimeter, and the mol ratio of described developer and described ice crystal is 1～3:1～5; Preferably, the mol ratio of described developer and described ice crystal is 1:1.
Alternatively, according to temperature-sensitive material of following the trail of for cold chain provided by the invention, it is characterized in that: described specified temp comprises 10 ℃, described indicator comprises the first component indicator and second component indicator,
Wherein, described the first component indicator comprises any one in following: acetic acid and formic acid,
Described second component indicator comprises any one in following: cyclohexanol, tertiary butyl alcohol and Glycerin.
Alternatively, according to temperature-sensitive material of following the trail of for cold chain provided by the invention, it is characterized in that: described specified temp comprises 47-64 ℃,
Described indicator comprises paraffin particles, wherein, in described paraffin particles, is sealed with water.
Alternatively, according to temperature-sensitive material of following the trail of for cold chain provided by the invention, it is characterized in that: described specified temp comprises-63.5 ℃, described indicator comprises the solid particle containing iodine, the described solid particle containing iodine is that the chloroformic solution by iodine grinds and forms after-80 ℃ of quick-frozens
Described developer comprises starch.
Alternatively, according to temperature-sensitive material of following the trail of for cold chain provided by the invention, it is characterized in that: described specified temp comprises 0 ℃, and described indicator comprises ice crystal,
Described developer comprises any one in following: discolour silica gel and basic fuchsin.
Alternatively, according to temperature-sensitive material of following the trail of for cold chain provided by the invention, it is characterized in that: described temperature-sensitive material of following the trail of for cold chain is prepared to following any one form: powdery, bulk and sheet,
Described temperature-sensitive material of following the trail of for cold chain can be made into any form and shape according to service condition.
Described temperature-sensitive material of following the trail of for cold chain exists with following any one or various ways, so that cold chain is carried out to tracking and managing: insert among container, and be made into intelligent article coding.
Pack described temperature-sensitive material of following the trail of for cold chain into bag or insert among vessel, to temperature-sensitive material and food are isolated, to guarantee the security of food.After above-mentioned material being placed in to bag or inserting among vessel, it can be stored together with food, thereby detect the temperature variations of food.Monitoring for this variation makes with the naked eye can identify, easy to use, with low cost.
Described temperature-sensitive material of following the trail of for cold chain is mixed into the methods such as printing for ink, spraying, brushing and is made into intelligent article coding, be attached to outside food pack, not only facilitate identification food information, can also conveniently detect the temperature variations of food, to realize cold chain tracking and managing.
Temperature-sensitive material of following the trail of for cold chain provided by the invention at least can realize cold chain tracing management.
Accompanying drawing explanation
By reading below detailed description of the preferred embodiment, various other advantage and benefits will become cheer and bright for those of ordinary skills.Accompanying drawing is only for the object of preferred implementation is shown, and do not think limitation of the present invention.And in whole accompanying drawing, by identical reference symbol, represent identical parts.Wherein in the accompanying drawings, a plurality of identical parts of alphabetic flag indication after reference number, when these parts of general reference, will omit its last alphabetic flag.In the accompanying drawings:
Fig. 1 shows the method for making of the responsive to temperature type intelligent barcode temperature variation cog region of following the trail of for cold chain of a preferred embodiment of the invention.
Fig. 2 shows the method for making of the responsive to temperature type intelligent barcode temperature variation cog region of following the trail of for cold chain of a preferred embodiment of the invention.
Fig. 3 shows the method for making of the responsive to temperature type intelligent barcode temperature variation cog region of following the trail of for cold chain of a preferred embodiment of the invention.
Fig. 4 shows the method for making of the responsive to temperature type intelligent barcode temperature variation cog region of following the trail of for cold chain of a preferred embodiment of the invention.
Fig. 5 shows the method for making of the responsive to temperature type intelligent barcode temperature variation cog region of following the trail of for cold chain of a preferred embodiment of the invention.
Schematic diagram before the responsive to temperature type one dimension intelligent barcode of following the trail of for the cold chain colour developing that Fig. 6 shows a preferred embodiment of the invention reacts.
Schematic diagram after the responsive to temperature type list warm area one dimension intelligent barcode of following the trail of for the cold chain colour developing that Fig. 7 shows a preferred embodiment of the invention reacts.
Fig. 8 shows the schematic diagram of many warm areas of responsive to temperature type one dimension intelligent barcode of following the trail of for cold chain of a preferred embodiment of the invention.And
Fig. 9 shows the schematic diagram of the responsive to temperature type list warm area of following the trail of for the cold chain two dimension intelligent barcode of a preferred embodiment of the invention.
Wherein: temperature variation cog region 1, product type cog region 2.
Embodiment
The invention provides many applicable creative concepts, this creativeness concept can be reflected in a large number of in concrete context.The specific embodiment of describing in following embodiments of the present invention is only as the exemplary illustration of the specific embodiment of the present invention, and do not form limitation of the scope of the invention.
Below in conjunction with accompanying drawing and concrete embodiment, the invention will be further described:
A temperature-sensitive material of following the trail of for cold chain, comprises developer and indicator, and wherein, described indicator can melt under specified temp, and the color of described developer is changed.
As first embodiment of the present invention, a kind of temperature-sensitive material of following the trail of for cold chain, described indicator comprises the solid particle containing iodine, and the described solid particle containing iodine is that the chloroformic solution by iodine grinds and forms after-80 ℃ of quick-frozens, and described developer comprises starch.When described specified temp is-63.5 ℃, the described solid particle containing iodine dissolves, and makes starch generation chromogenic reaction.
As second embodiment of the present invention, described in a kind of temperature-sensitive material of following the trail of for cold chain, indicator comprises the ice crystal of sodium chloride solution, and described developer comprises anhydrous cupric sulfate.When described specified temp is-10 ℃, the ice crystal of described sodium chloride solution dissolves, and makes anhydrous cupric sulfate generation chromogenic reaction.
As the 3rd embodiment of the present invention, described in a kind of temperature-sensitive material of following the trail of for cold chain, indicator comprises ice crystal, and described ice crystal is by ice cube, to be ground and formed under the environment temperature lower than 0 ℃.Wherein, described developer comprises any one in following: anhydrous cupric sulfate, discolour silica gel and basic fuchsin.The mol ratio of described developer and described ice crystal is 1～3:1～5; Preferably, the mol ratio of described developer and described ice crystal is 1:1.The diameter of described ice crystal is 0.5 millimeter-1 millimeter.When described specified temp is 0 ℃, ice crystal dissolves, and can make anhydrous cupric sulfate, discolour silica gel and basic fuchsin generation chromogenic reaction.
As the 4th embodiment of the present invention, described in a kind of temperature-sensitive material of following the trail of for cold chain, indicator comprises the first component indicator and second component indicator, wherein, described the first component indicator comprises any one in following: acetic acid and formic acid, described second component indicator comprises any one in following: cyclohexanol, tertiary butyl alcohol and 1,2,3-glycerine, described developer comprises anhydrous cupric sulfate.When described specified temp is 10 ℃, described the first component indicator and described one of them component of second component indicator or two components are all fused into liquid state, and described the first component indicator and second component indicator react, and generate water.The water and the developer anhydrous cupric sulfate generation chromogenic reaction that generate.
As the 5th embodiment of the present invention, described in a kind of temperature-sensitive material of following the trail of for cold chain, indicator comprises paraffin particles, wherein, in described paraffin particles, is sealed with water, and described developer comprises anhydrous cupric sulfate.When described specified temp is 47 ℃-64 ℃, described paraffin dissolves, and water-soluble in paraffin goes out, and makes the generation chromogenic reaction of anhydrous cupric sulfate.
Paraffin claims again crystalline wax, normally white, colorless and odorless waxy solid, at 47 ℃ of-64 ℃ of fusings, the about 0.9g/cm of density
3.
Temperature-sensitive material of following the trail of for cold chain provided by the invention at least can make cold chain realize tracing management.
After the temperature-sensitive material generation chromogenic reaction of following the trail of for cold chain above, can detect with optical instrument, comprise the reflection strength etc. of the laser of human eye, camera, video camera, particular color wavelength.
Temperature-sensitive material provided by the invention can be as preparing intelligent article coding, so that cold chain is carried out to tracking and managing.
A kind of responsive to temperature type intelligent article coding of following the trail of for cold chain, comprise product type cog region and temperature variation cog region, described temperature variation cog region comprises temperature-sensitive material, described temperature-sensitive material comprises developer and indicator, wherein, described indicator can melt under specified temp, and the color of described developer is changed.
Melting, is the phase transition process that material is liquid phase by solid transformation.It is the inverse process of solidifying.Under certain pressure, solid (crystal) will be heated to uniform temperature (fusing point) and could melt, temperature-resistant in fusion processes, from the external world, absorbs heat.Corresponding temperature when crystal melts, is called fusing point.
Bar code and Quick Response Code are referred to as intelligent article coding.
Bar code (barcode) is a plurality of secret notes and the blank that width is not waited, and arranges, in order to express the graphical identifier of one group of information according to certain coding rule.Common bar code is the pattern of parallel lines that the secret note (abbreviation bar) that differed greatly by reflectivity and informal voucher (being called for short empty) are lined up.
Quick Response Code (Two-dimensional code), claims again two-dimensional bar code, and it is the chequered with black and white figure above distributing in plane (two-dimensional directional) according to certain rules with specific geometric figure, is a key of all information datas.In modern commerce activity, attainable application is very extensive, as: product false proof/tracing to the source, advertisement pushing, web site url, data download, commodity transaction, location/navigation, electronic certificate, vehicle management, information transmission, business card exchange, wifi shares etc.Nowadays the application that (being called for short 313) function was swept and swept to smart mobile phone makes Quick Response Code more general.
In conventional art, intelligent article coding only comprises product type cog region, and this region is for identifying product type, comprises the region of the information such as kind, manufacturer, date of manufacture of product.The responsive to temperature type intelligent article of following the trail of for cold chain provided by the invention is coded on the basis of bar code and Quick Response Code and adds temperature variation cog region to obtain, for identifying product in the region of transportation and storage process temperature variation, completing the tracing management of product cold chain with this.
From formal differentiation, responsive to temperature type intelligent article coding also comprises one dimension intelligent article coding (being bar code) and two-dimentional intelligent article coding.Wherein, because temperature variation cog region may further include single warm area and many warm areas, one dimension intelligent article coding therefore provided by the invention also comprises single warm area intelligent article coding and many warm areas intelligent article coding.
Because it has the ability (claiming again " perception bar code ") of perception, the function that is similar to sensor (claims again " sensing bar code ", or " bar code sensor "), on the basis of Quick Response Code, increased more one dimensions even the information of multidimensional (claim again " 3D bar code ", " three-dimensional code ", " multidimensional code ").This bar code can be one-dimensional bar code, and also Quick Response Code, can be also the discernible word of other staff or figure; Can be monochromatic, can be also colored; According to the difference of indicator trigger condition time, that this bar code is divided into memoryless formula and have memory function.By the display effect needed time length of having an effect, be divided into: second level, minute level, carves level, hour level, half a day level, day level, week level, month level, season level, grade, ten grades.Parameter by perception is divided into: responsive to temperature type, Photosensitive, wet sensitive type, quick type of oxygen etc.By realization mechanism, be divided into: physical computing, stoichiometric calculation, biological computation, nanometer is calculated, etc.Complexity by function is divided into: monotype, and Multi-layer composite, multizone is compound, many materials mixed type.
Responsive to temperature type intelligent article coding, is a kind of in intelligent article coding, this bar code variation with temperature and changing.Wherein the current temperature conditions of real-time demonstration of memoryless formula, as the temperature of the temperature of the temperature of real-time demonstration beverage, food, water for bathing, can be used for temperature cheaply and shows.And have can following the trail of of memory function to show event in history and show extreme value or the integrated value in Memory Process.As record mxm., and recording minimum, log history exceeds the integrated value of certain temperature.Different intelligent article code has different application in field separately.
Wherein with the responsive to temperature type intelligent article of memory function material, be coded in the fields such as cold flow tracking and have good application prospect.Typical application scenarios such as: in commodity production, complete, or has detected, enter after freezer, this responsive to temperature type intelligent article of labeling is encoded; In the process of circulation, if these article always in freezing state, the label of the commodity that consumer takes is that non-color status is (as CuSO
4white); If these article, in the process of circulation, once in the state of thawing, the label of the commodity that consumer takes is color status (as the blueness of Salzburg vitriol), so, can play more intense indicative function.Meanwhile, this process is conventionally irreversible, at least the in the situation that of not damaged former bar code printing packing, so, can play more intense putting and distort function.
Responsive to temperature type intelligent article coding comprises fusing point type responsive to temperature type intelligent article coding, below the melting temperature of this material, material is graininess, between polycomponent, substantially do not react, or this reaction occurs over just particle surface, reactivity is extremely low, keeps for a long time this material below fusing point, and this bar code keeps original chemical composition and physical characteristics.Once this material is more than fusing point, this part material granule will melt, and form liquid state, and simultaneous temperature rises, and reactivity is strengthened, and between polycomponent, will react rapidly, and its chemical composition and physics change.Wherein, the temperature sensitive component of using in the simplest fusing point type intelligent article coding is ice particle, by increasing in ice particle the salt composition that grades, can change the fusing point of ice between-20 ℃ to+10 ℃, is particularly suitable for that food product refrigeration transports and the monitoring of Refrigerated Transport.
The described responsive to temperature type intelligent article coding of following the trail of for cold chain at least can make cold chain realize tracing management.
Below the temperature variation cog region of the responsive to temperature type intelligent article of following the trail of for the cold chain coding of each temperature spot is done to explain in detail, the preparation method of product type cog region had both comprised the method that prior art provides, and also comprised the method that WeiLai Technology provides.
Wherein, a kind of indicator of the responsive to temperature type intelligent article coding of following the trail of for cold chain comprises anhydrous cupric sulfate, and described indicator forms or generates aqueous water under specified temp, thereby the color of described anhydrous cupric sulfate is changed.
Described formation refers to physical reactions, as the solid-state ice crystal of embodiment 3 changes aqueous water into, or as aqueous water in embodiment 2 be to separate out in the ice crystal of sodium chloride saturated solution, or as aqueous water in embodiment 5 be to flow out after melted paraffin wax.
Described generation refers to chemical reaction, as bi-material that in embodiment 4, indicator comprises under given conditions generates aqueous water after reacting.
Embodiment 1
Provide a kind of at-63.5 ℃ of intelligent articles codings that chromogenic reactions occur: described indicator comprises the solid particle containing iodine, the described solid particle containing iodine is that the chloroformic solution by iodine grinds and forms after-80 ℃ of quick-frozens, and described developer comprises starch.Its principle is, chloroform fusing when environment temperature is-63.5 ℃, and now elemental iodine is separated out, thereby is able to and starch generation chromogenic reaction.
According to the method for making of the responsive to temperature type intelligent article of following the trail of for the cold chain coding temperature variation cog region of a preferred embodiment of the invention shown in Fig. 1, the method for making of the described responsive to temperature type intelligent article coding of following the trail of for cold chain, comprises step successively:
S1001 makes the chloroformic solution of iodine: the fusing point of chloroform is-63.5 ℃, and at the temperature higher than chloroform fusing point, (as-60 ℃), are dissolved in chloroform by iodine, make the chloroformic solution of iodine, wherein, and iodine: chloroform=0.5:100 (mass ratio).
The step of S1002 quick-frozen and grinding: under liquid nitrogen temperature, the chloroformic solution of the iodine under the environment temperature of-80 ℃, step S1001 being made carries out quick-frozen, makes the solid particle containing iodine thereby be ground into afterwards powder particle.Wherein, this particle diameter is 10 microns-1000 microns.
The step of the starch granules that S1003 is dried: starch granules is dried to moisture and is less than <1%, and make the particle diameter of starch granules remain on 2-100 micron.
S1004 blend step: solid particulate matter, starch granules and liquid nitrogen containing iodine are thoroughly mixed to form to suspension standby.Wherein, containing the solid particulate matter of iodine and the weight ratio of starch granules, be 1～10:1～10.Preferably, when being 1:1 containing the solid particulate matter of iodine and the weight ratio of starch granules, the chromogenic reaction of described intelligent article coding is the sensitiveest.Liquid nitrogen in right amount.
The suspension here will be chosen liquid nitrogen, is mainly temperature requirement, and the fusing point of the liquid of suspension will be lower than above material, and substantially soluble, after printing, is heated to the temperature that liquid nitrogen can volatilize, as-80 ℃ of left and right.
This material in use, for avoiding in air iodine reduction, or the starch moisture absorption, need carry out suitable safeguard measure, as adopted polybag or other vacuum means air-isolations.
The step of S1005 intelligent article code printing: the suspension that S1004 step is prepared into injects print cartridge, the temperature variation cog region of printing the described responsive to temperature type intelligent article coding of following the trail of for cold chain by printer.
The responsive to temperature type intelligent article of following the trail of for the cold chain coding of preparing according to said method, can be used for anti-thaw tracking, biological Embryo storage, and the deep-frozen food of freezer is prevented thawing throughout the year.
Embodiment 2
Provide the intelligent article coding that chromogenic reaction occurs at-10 ℃: described indicator comprises the ice crystal of sodium chloride solution, and described developer comprises anhydrous cupric sulfate.Its principle is, sodium chloride melting when environment temperature is-10 ℃, and now elutriation goes out, thereby is able to and anhydrous cupric sulfate generation chromogenic reaction.
According to the method for making of the responsive to temperature type intelligent article of following the trail of for the cold chain coding temperature variation cog region of a preferred embodiment of the invention shown in Fig. 2, the method for making of the described responsive to temperature type intelligent article coding of following the trail of for cold chain, comprises step:
S2001 makes the step of sodium chloride solution: will analyze pure sodium chloride and distilled water and mix, and be mixed with the sodium chloride solution of 0.1mol/l.
The step of S2002 quick-frozen and grinding: sodium chloride solution prepared by step S2001 quick-frozen under the environment temperature of-30 ℃, thereby be ground into afterwards powder particle, make solid particle of sodium chloride.Wherein, this particle diameter is 10 microns-1000 microns.
S2003 makes the step of suspension: anhydrous cupric sulfate, solid particle of sodium chloride and absolute ethyl alcohol are fully mixed and made into suspension, and standby.Wherein, the weight ratio of anhydrous cupric sulfate and solid particle of sodium chloride is 1～10:1～10.Preferably, when the weight ratio of described anhydrous cupric sulfate and solid particle of sodium chloride is 1:1, the chromogenic reaction of described intelligent article coding is the sensitiveest, and absolute ethyl alcohol in right amount.
The step of S2004 intelligent article code printing: the described suspension that S2003 step is made injects print cartridge, the temperature variation cog region of printing the described responsive to temperature type intelligent article coding of following the trail of for cold chain by printer.
The responsive to temperature type intelligent article of following the trail of for the cold chain coding of preparing according to said method, can be used for frozen type food and prevents thawing.
Embodiment 3
Provide a kind of at 0 ℃ of intelligent article coding that chromogenic reaction occurs: described indicator comprises ice crystal, and described ice crystal is ground and formed by ice cube under the environment temperature lower than 0 ℃.Described developer comprises any one in following: anhydrous cupric sulfate, discolour silica gel and basic fuchsin.
Basic fuchsin is the crystallization of green metal gloss, is dissolved in ethanol and amylalcohol, is slightly soluble in water, and solution takes on a red color, and is insoluble to ether; Maximum absorption wavelength (in ethanol) 543nm (ε 93000).
Discolour silica gel is exactly in silica gel, to have added some with the inorganic salts of water of crystallization, a small amount of silicon dichloride, as cobalt salt.When anhydrous, be exactly state while losing water of crystallization be blue, the state while being exactly water of crystallization during water suction is pink.Discolour silica gel can recycle.After having change color, can in drying box, toast, make it get back to anhydrous state and just can continue to have used.
The mol ratio of described developer and described ice crystal is 1～3:1～5; Preferably, when the mol ratio of described developer and described ice crystal is 1:1, the chromogenic reaction of described intelligent article coding is the sensitiveest.
The diameter of described ice crystal is 0.5 millimeter-1 millimeter.
According to the method for making of the responsive to temperature type intelligent article of following the trail of for the cold chain coding temperature variation cog region of a preferred embodiment of the invention shown in Fig. 3.The method for making of the described responsive to temperature type intelligent article coding of following the trail of for cold chain, comprises step:
S3001 makes the step of ice crystal: temperature lower than the environment of 0 ℃ in, ice cube is ground to form to the ice crystal that diameter is 0.5-1 millimeter.
S3002 makes the step of suspension: anhydrous cupric sulfate, ice crystal and absolute ethyl alcohol are mixed to form to suspension.Wherein, the mol ratio of described anhydrous cupric sulfate and described ice crystal is 1～3:1～5; Preferably, when the mol ratio of described anhydrous cupric sulfate and described ice crystal is 1:1, the chromogenic reaction of described intelligent article coding is the sensitiveest.Described absolute ethyl alcohol in right amount.
The step of S3003 intelligent article code printing: described suspension is injected to print cartridge, print the temperature variation cog region of the described responsive to temperature type intelligent article coding of following the trail of for cold chain by printer.
Alternatively, above preparation method is equally applicable to select in discolour silica gel or the intelligent article coding of basic fuchsin as developer.
The responsive to temperature type intelligent article of following the trail of for the cold chain coding of preparing according to said method, can be used for 0 ℃ of anti-thawing of preservation food.
Embodiment 4
Provide a kind of at 10 ℃ of intelligent article codings that chromogenic reaction occurs: described indicator comprises the first component indicator and second component indicator, wherein, described the first component indicator comprises any one in following: acetic acid and formic acid, described second component indicator comprises any one in following: cyclohexanol, tertiary butyl alcohol and 1,2,3-glycerine.Described developer comprises anhydrous cupric sulfate.
Wherein, described the first component indicator and described second component indicator are solid-state at the temperature lower than fusing point separately, in situation about not heating, substantially do not react, but when wherein any one component or two components are all fused into after liquid state, described the first component indicator and second component indicator react, and generate water.The water and the developer anhydrous cupric sulfate generation chromogenic reaction that generate.
According to the method for making of the responsive to temperature type intelligent article of following the trail of for the cold chain coding temperature variation cog region of a preferred embodiment of the invention shown in Fig. 4, the method for making of the described responsive to temperature type intelligent article coding of following the trail of for cold chain, comprises step:
S4001 indicator preparation process: (at the temperature lower than the fusing point of each component indicator) at low temperatures, described the first component indicator and described second component indicator are ground to form respectively to solid particle, grain size: 10 microns-1000 microns, then the amount that is 1:1 according to COOH base with OH base mol ratio is mixed, and forms indicator mixture.
S4002 blend step: the described indicator mixture that S4001 preparation is formed is mixed with described anhydrous cupric sulfate, forms fusing point type inductive material.Wherein, the weight ratio of described indicator mixture and described anhydrous cupric sulfate is 1～10:1～10.Preferably, when the weight ratio of described indicator mixture and described anhydrous cupric sulfate is 1:1, the best results of chromogenic reaction.
The step of S4003 intelligent article code printing: the described fusing point type inductive material that S4002 step is prepared from is prepared into suspension, described suspension injects print cartridge, prints the temperature variation cog region of the described responsive to temperature type intelligent article coding of following the trail of for cold chain by printer.Wherein, it is solvent that the preparation of suspension can be selected absolute ethyl alcohol, and the weight of absolute ethyl alcohol in right amount.
The responsive to temperature type intelligent article of following the trail of for the cold chain coding of preparing according to said method, can be used for refrigerating fruits and vegetables and prevents leaving refrigeration.
Embodiment 5
Provide a kind of at the 47-64 ℃ of intelligent article coding that chromogenic reaction occurs: the intelligent article coding providing for the present embodiment, described indicator comprises paraffin particles, wherein, in described paraffin particles, is sealed with water.Described developer comprises anhydrous cupric sulfate.Its principle is, when environment temperature is 47-64 ℃, melted paraffin wax, is sealed in current in paraffin out, thereby is able to and anhydrous cupric sulfate generation chromogenic reaction.
According to the method for making of the responsive to temperature type intelligent article of following the trail of for the cold chain coding temperature variation cog region of a preferred embodiment of the invention shown in Fig. 5, the method for making of the described responsive to temperature type intelligent article coding of following the trail of for cold chain, comprises step:
S5001 makes the step of ice crystal: temperature lower than the environment of 0 ℃ in, ice cube is ground to form to the ice crystal that diameter is 0.5-1 millimeter.
S5002 wraps up ice crystal, grinding steps in paraffin: the crystal ice granule that step S1501 is produced wraps up in paraffin, afterwards described paraffin is ground to form to the paraffin particles that diameter is the parcel ice crystal of 1.5-1.8 millimeter.
Paraffin claims again crystalline wax, normally white, colorless and odorless waxy solid, at 47 ℃ of-64 ℃ of fusings, the about 0.9g/cm of density
3.
S5003 blend step: paraffin particles and the anhydrous cupric sulfate of parcel ice crystal are mixed to form to fusing point type inductive material, described fusing point type inductive material is prepared into suspension, standby.Wherein, the weight ratio of the paraffin particles of anhydrous cupric sulfate and parcel ice crystal is 1～10:1～10.Preferably, when the weight ratio of the paraffin particles of described anhydrous cupric sulfate and chlorine parcel ice crystal is 1:1, the chromogenic reaction of described intelligent article coding is the sensitiveest.This suspension can select absolute ethyl alcohol as solvent, and absolute ethyl alcohol in right amount.
The step of S5004 intelligent article code printing: described suspension is injected to print cartridge, print the temperature variation cog region of the described responsive to temperature type intelligent article coding of following the trail of for cold chain by printer.
Method for making that it should be noted that the responsive to temperature type intelligent article coding of following the trail of for cold chain provided by the invention not only comprises the method for making that above embodiment provides, and also comprises method for making that prior art provides and the bar code that WeiLai Technology provides.
For the reliability that further the checking responsive to temperature type intelligent article of following the trail of for cold chain provided by the invention is encoded, inventor has also done corresponding test and has verified:
Sensory test
The intelligent article coding that inventor has selected 10 people to generate the preparation according to embodiment 1-5 is at random verified.Test specimen is divided into 2 groups, and one group is the product through thawing, and one group is the product that process is not thawed, and by above 10 people, respectively the intelligent article coding of this two set product is estimated to judge that whether this product is through thawing.After range estimation, 10 people have all accurately judged the temperature of whether thawing and thawing of test product.
Colour test
Inventor is adjusted to the temperature of 5 temperature-controlled boxs under the fusing point of the indicator of each material in embodiment 1-5, and the intelligent article coding then embodiment 1-5 being provided is inserted in corresponding temperature-controlled box, and above bar code is without chromogenic reaction; Temperature being adjusted on fusing point to 10 ℃, waiting for about 2 hours, all there is obvious chromogenic reaction in 5 intelligent articles codings.
Schematic diagram before reacting according to the responsive to temperature type one dimension intelligent article of following the trail of for the cold chain coding colour developing of a preferred embodiment of the invention shown in Fig. 6, schematic diagram after the responsive to temperature type list warm area one dimension intelligent article of following the trail of for the cold chain coding colour developing of a preferred embodiment of the invention shown in Fig. 7 reacts, the schematic diagram of many warm areas of responsive to temperature type one dimension intelligent article of following the trail of for cold chain coding of a preferred embodiment of the invention shown in Fig. 8, and the schematic diagram of the responsive to temperature type list warm area of following the trail of for the cold chain two dimension intelligent article coding of a preferred embodiment of the invention shown in Fig. 9, the responsive to temperature type intelligent article coding of following the trail of for cold chain provided by the invention, the form of described responsive to temperature type intelligent article coding comprises bar code bar code and two-dimensional bar code Quick Response Code.
Fig. 6 and Fig. 7 show the schematic diagram before and after single warm area bar code bar code chromogenic reaction, can obviously see that this intelligent article coding has indicative function from schematic diagram.
Fig. 8 shows the intelligent article coding that can follow the trail of many warm areas temperature variation, and this intelligent article coding can more accurately indicate the interval range of temperature variation.
Fig. 9 shows single warm area two dimension intelligent article coding, in this intelligent article coding, is provided with product type cog region and temperature variation cog region, in temperature variation cog region, can judge by the change color of color Quick Response Code its temperature variation state.
Generally speaking, the responsive to temperature type intelligent article coding of following the trail of for cold chain provided by the invention compared with prior art has the following advantages:
First, this series technique, principle is simple, technology maturation, can application wide, with low cost, one-time investment be little, and anti-counterfeit capability is strong, can realize unattended overall process and review, and has extraordinary application prospect and promotion prospect; In conjunction with other means of food safety management, can effectively solve the most insoluble technical matters in food security field.
Secondly, this engineering department realizes unmanned, and overall process is reviewed, and any one link goes wrong, this bar code colour developing, and irreversible.
Again, project one-time investment is little, only need on production line, newly purchase a Special bar code printing machine, also can share a printer by multiple enterprises, and directly buying is printed on the label of temperature-sensitive intelligent article coding.
In addition, review cost low, trace back process does not need to increase hardware device, only needs upgrade software.
Also have, consumables cost is low, and each bar code material usage is about 500 milligrams, and the consumptive material of every ten thousand bar codes is only 5 kilograms, i.e. the cost control of each bar code is at several Renminbi of sharing money, not higher than existing bar code, well below equipment such as RFID.
Finally, consumptive material storage is convenient, only needs and the storage condition for the treatment of that track articles is same, and meanwhile, this intelligent article coding has stronger anti-counterfeiting ability, forges this label difficulty, forges cost far above several times of merchandise costs.
It should be noted, the present invention will be described rather than limit the invention for above-described embodiment, and those skilled in the art can design alternative embodiment in the situation that do not depart from the scope of claims.In the claims, any reference symbol between bracket should be configured to limitations on claims.Word " comprises " not to be got rid of existence and is not listed as element or step in the claims.Being positioned at word " " before element or " one " does not get rid of and has a plurality of such elements.The use of word first, second and C grade does not represent any order.Can be title by these word explanations.
Claims (10)
1. a temperature-sensitive material of following the trail of for cold chain, is characterized in that: described temperature-sensitive material comprises developer and indicator,
Wherein, described indicator melts under specified temp, and the color of described developer is changed.
2. temperature-sensitive material of following the trail of for cold chain according to claim 1, described developer comprises anhydrous cupric sulfate, described indicator forms or generates aqueous water under specified temp, thereby the color of described anhydrous cupric sulfate is changed.
3. temperature-sensitive material of following the trail of for cold chain according to claim 2, wherein, described specified temp comprises-10 ℃, described indicator comprises the ice crystal of sodium chloride solution.
4. temperature-sensitive material of following the trail of for cold chain according to claim 2, is characterized in that: described specified temp comprises 0 ℃, and described indicator comprises ice crystal, and described ice crystal is by ice cube, to be ground and formed under the environment temperature lower than 0 ℃.
5. temperature-sensitive material of following the trail of for cold chain according to claim 4, the diameter of described ice crystal is 0.5 millimeter-1 millimeter, the mol ratio of described developer and described ice crystal is 1～3:1～5; Preferably, the mol ratio of described developer and described ice crystal is 1:1.
6. temperature-sensitive material of following the trail of for cold chain according to claim 2, wherein, described specified temp comprises 10 ℃, described indicator comprises the first component indicator and second component indicator,
Wherein, described the first component indicator comprises any one in following: acetic acid and formic acid,
Described second component indicator comprises any one in following: cyclohexanol, tertiary butyl alcohol and Glycerin.
7. temperature-sensitive material of following the trail of for cold chain according to claim 2, described specified temp comprises 47-64 ℃,
Described indicator comprises paraffin particles, wherein, in described paraffin particles, is sealed with water.
8. temperature-sensitive material of following the trail of for cold chain according to claim 1, wherein, described specified temp comprises-63.5 ℃, and described indicator comprises the solid particle containing iodine, the described solid particle containing iodine is that the chloroformic solution by iodine grinds and forms after-80 ℃ of quick-frozens
Described developer comprises starch.
9. temperature-sensitive material of following the trail of for cold chain according to claim 1, described specified temp comprises 0 ℃, described indicator comprises ice crystal,
Described developer comprises any one in following: discolour silica gel and basic fuchsin.
10. according to the temperature-sensitive material of following the trail of for cold chain described in any one in claim 1-9, described temperature-sensitive material of following the trail of for cold chain is prepared to following any one form: powdery, bulk and sheet,
Described temperature-sensitive material of following the trail of for cold chain exists with following any one or various ways, so that cold chain is carried out to tracking and managing: insert among container and be made into intelligent article coding.
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