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WO2008143537A1 - Procédé et dispositif pour une indication irréversible de dépassement d'une température maximum prédéterminée d'objets congelés en particulier des produits - Google Patents

Procédé et dispositif pour une indication irréversible de dépassement d'une température maximum prédéterminée d'objets congelés en particulier des produits Download PDF

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Publication number
WO2008143537A1
WO2008143537A1 PCT/PL2008/000036 PL2008000036W WO2008143537A1 WO 2008143537 A1 WO2008143537 A1 WO 2008143537A1 PL 2008000036 W PL2008000036 W PL 2008000036W WO 2008143537 A1 WO2008143537 A1 WO 2008143537A1
Authority
WO
WIPO (PCT)
Prior art keywords
subgroup
indicating
substance
water
substances
Prior art date
Application number
PCT/PL2008/000036
Other languages
English (en)
Other versions
WO2008143537A4 (fr
Inventor
Wojciech Chrzanowski
Waclaw Grzybkowski
Miroslaw Mecik
Czeslaw Poplawski
Malgorzata Kluczyk
Damian Zielinski
Pawel Wilkowski
Original Assignee
Invenview Sp. Z O.O.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from PL382442A external-priority patent/PL213668B1/pl
Priority claimed from PL383582A external-priority patent/PL209532B1/pl
Priority claimed from PL384135A external-priority patent/PL214426B1/pl
Priority claimed from PL384532A external-priority patent/PL384532A1/pl
Priority claimed from PL385132A external-priority patent/PL215241B1/pl
Application filed by Invenview Sp. Z O.O. filed Critical Invenview Sp. Z O.O.
Publication of WO2008143537A1 publication Critical patent/WO2008143537A1/fr
Publication of WO2008143537A4 publication Critical patent/WO2008143537A4/fr

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Classifications

    • 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
    • G01K3/005—Circuits arrangements for indicating a predetermined temperature
    • 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
    • G01K11/06—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using melting, freezing, or softening

Definitions

  • the subject matter of the invention is the method and device for an irreversible indication of exceeding a set maximum temperature of frozen objects especially products.
  • the application No. WO 0172601 Al specifies an apparatus for an irreversible indication of a set maximum temperature of frozen products, which consists of an internal tank and an external tank filled with different solutions. In case of mixing, the solutions form a mixture of another colour. Upon freezing the formed ice breaks the internal tank and in case of defrosting the solutions pouring from tanks mix, which causes the tinge of the resulting mixture.
  • the Polish patent application No. P.370395 specifies an indicator of exceeding a defrosting temperature for frozen food products.
  • This indicator comprises a foil bag with an indicating element inside made of a frozen liquid in the form of two-coloured lens. In case of defrosting the ice is melted and the colours of the liquids mix. It is not possible to return the indicator to the original form.
  • the application No. US6029601 specifies a thawing indication marker for frozen food for determining whether or not a frozen food has been thawed. It comprises a tube of an elastic transparent resin, the tube being bent at its center to form two separate containers. One container contains a coloured gel-like liquid prepared from an edible starch and food colour and the other container contains a gel-like liquid also prepared from an edible starch and food colour which is different from the first food colour.
  • the marker is used by straightening the bent portion and applying it to frozen food. If the food undergoes thawing, as a result of being subjected to a temperature above the freezing point of water, the gels become less viscous and can intermingle. By virtue of the colour difference, one can observe whether or not any intermingling of the two different coloured gels has occurred and therefore, whether or not the food stuff has been subjected to non-thawing conditions.
  • the application No. WO2007116071 specifies an indicator of the keeping condition of products which makes it possible to detect whether the temperature of the product has exceeded a predetermined threshold, called the setpoint temperature.
  • the indicator is comprising two transparent films assembled hermetically so as to enclose two canisters of liquid or viscous products. These canisters are being separated from one another by an adhesive joint hermetically connecting the opposing faces of the two films.
  • the adhesive loses its adhesive properties when a predetermined temperature, referred to as the activation temperature of the indicator, is exceeded, in such a way that, if, after the activation of the indicator as a consequence of the exceedance of the activation temperature, the setpoint temperature is reached, then the viscous products are free to mix with one another.
  • the method for an irreversible indication of exceeding a set temperature of frozen objects especially products which involves placing near a frozen product an indicating group containing water, that changes its colour after defrosting is characterized according to the present invention by placing on a waterproof constructional element or inside a waterproof constructional element, preferably with a rough surface, within a short distance two subgroups, which form an indicating group.
  • the subgroups are formed so that in a signalling condition they can contact via water.
  • the first subgroup is made of immobilized water, preferably containing substances that reduce its freezing point, and indicating substances, which are activated in the signalling condition in a water solution by activating substances.
  • the second subgroup is made of immobilized water preferably containing substances reducing its freezing point and activating substances, which activate the indicating substances in the signalling condition in the water solution. If necessary an indicating group is sheltered with a preferably waterproof transparent protective element.
  • a gel which is made of water and a gelling agent, preferably agarose and/or gelatine is used as immobilized water.
  • each gel is selected so that a structure of first of them maintains its durability at a temperature lower than the structure of the second one, while a gel structure stabilising substance, preferably glycerol, is added to a gel with a structure which maintains its durability at a lower temperature.
  • a gel structure stabilising substance preferably glycerol
  • a colour chemical indicator is used, preferably single-colour, and as a substance activating an indicating substance chemical buffer is used.
  • phenolphthalein is used as a colour chemical indicator, while a phosphate buffer is applied as a chemical buffer.
  • an indicating substance and an activating substance are selected so that they form a redox system.
  • the substance reducing the water freezing point is sodium chloride and/or calcium chloride and/or ethyl alcohol.
  • the first subgroup and the second subgroup are aligned.
  • the length / of the colour zone is measured in the first subgroup and/or second subgroup, while the following formula: where:
  • T 0 is a maximum set temperature of indication at which the activating and/or indicating substances solutions are melted in both subgroups
  • the method for an irreversible indication of exceeding a set temperature of frozen objects especially products which involves placing near a frozen product an indicating group containing water, that changes its colour after defrosting is characterized according to the present invention by placing on a waterproof constructional element or inside a waterproof constructional element, preferably with a rough surface, within a short distance two subgroups, which form an indicating group.
  • the subgroups are formed so that in a signalling condition they can contact via water.
  • the first subgroup is made of immobilized water, preferably containing substances that reduce its freezing point, and a permanent dye, which moves to the water solution in the signalling condition.
  • the second subgroup is made of immobilized water. If necessary an indicating group is sheltered with a preferably waterproof transparent protective element.
  • a gel which is made of water and a gelling agent, preferably agarose and/or gelatine is used as immobilized water.
  • each gel is selected so that a structure of first of them maintains its durability at a temperature lower than the structure of the second one, while a gel structure stabilising substance, preferably glycerol, is added to a gel with a structure which maintains its durability at a lower temperature.
  • a gel structure stabilising substance preferably glycerol
  • the substance reducing the water freezing point is sodium chloride and/or calcium chloride and/or ethyl alcohol.
  • the first subgroup and the second subgroup are aligned.
  • the length / of the colour zone is measured in the second subgroup, while the following formula: where:
  • T 0 is a maximum set temperature of indication at which the water solution is released from the first gel
  • T - a temperature of an indicating group at any time in the indication condition
  • the device for an irreversible indication of exceeding a set maximum temperature of frozen objects especially products which consists of a constructional element and protective element and an indicating set containing water, that changes its colour after defrosting, is characterized according to the present invention by placing on a constructional element an indicating set containing three subsets placed near each other that contain substances that do not mix with each other and/or do not contact each other in the stand-by condition.
  • the first subset is made of immobilized water, preferably containing a substance that reduces its freezing point.
  • the second subset contains indicating substances that are activated in a water solution by an activating substance.
  • the third subset contains activating substances that activate the indicating substances in the signalling condition in the water solution.
  • the indicating set is sheltered with a protective element.
  • the constructional element or the protective element preferably is provided with thermal insulation element.
  • the second subset contains an indicating substance in a dry condition made of a colour chemical indicator, preferably single-colour.
  • the third subset contains a dry substance that activates an indicating substance.
  • phenolphthalein is a colour chemical indicator.
  • a substance that activates an indicating substance is a phosphate buffer.
  • the substance reducing the water freezing point is sodium chloride and/or calcium chloride and/or ethyl alcohol.
  • the immobilized water is made in the form of a gel, which is made of water and a gelling agent, preferably agarose and/or gelatine.
  • the first subset, the second subset and the third subset are spot-shaped.
  • the third subset is spot- shaped and is surrounded with the first subset which is ring-shaped, which is surrounded with the second subset which is ring-shaped.
  • the second subset is spot- shaped and is surrounded with the first subset which is ring-shaped, which is surrounded with the third subset which is ring-shaped.
  • the first subset, the second subset and the third subset are stripe-shaped spots, while the first subset is located between the second subset and the third subset.
  • the device for an irreversible indication of exceeding a set maximum temperature of frozen objects especially products which consists of a constructional element and protective element and an indicating group containing water, that changes its colour after defrosting, is characterized according to the present invention by placing on a constructional element an indicating set containing two subgroups placed near each other that contain substances that do not mix with each other and/or do not contact each other in the stand-by condition.
  • the first subgroup is made of immobilized water, preferably containing a substance that reduces its freezing point, and indicating substances that are activated in a water solution by activating substances.
  • the second subgroup contains activating substances that activate the indicating substances in the signalling condition in the water solution.
  • the indicating group is sheltered with a protective element.
  • the constructional element or the protective element is provided with thermal insulation element.
  • the first subgroup contains an indicating substance in the form of a colour chemical indicator, preferably single- colour.
  • the second subgroup contains a dry substance that activates an indicating substance.
  • phenolphthalein is a colour chemical indicator.
  • a substance that activates an indicating substance is a phosphate buffer.
  • the substance reducing the water freezing point is sodium chloride and/or calcium chloride and/or ethyl alcohol.
  • the immobilized water is made in the form of a gel, which is made of water and a gelling agent, preferably agarose and/or gelatine.
  • the first subgroup and the second subgroup are spot-shaped.
  • the first subgroup is spot- shaped and is surrounded with the second subgroup which is ring-shaped.
  • the second subgroup is spot- shaped and is surrounded with the first subgroup which is ring-shaped.
  • the first subgroup and the second subgroup are stripe-shaped spots.
  • the device for an irreversible indication of exceeding a set maximum temperature of frozen objects especially products which consists of a constructional element and protective element and an indicating group containing water, that changes its colour after defrosting is characterized according to the present invention by placing on the surface of a constructional element an indicating group containing two subgroups placed near each other that contain substances that do not mix with each other and/or do not contact each other in the stand-by condition.
  • the first subgroup is made of immobilized water, preferably containing a substance that reduces its freezing point, and activating substances that activate the indicating substances in the water solution in the signalling condition.
  • the second subgroup there are indicating substances that are activated by the activating substances in the water solution in the signalling condition.
  • the indicating group is sheltered with a protective element.
  • the constructional element or the protective element is provided with thermal insulation element.
  • the first subgroup contains an activating substance.
  • the second subgroup contains a dry indicating substance in the form of a colour chemical indicator, preferably single-colour.
  • phenolphthalein is a colour chemical indicator
  • a substance that activates an indicating substance is a phosphate buffer.
  • the substance reducing the water freezing point is sodium chloride and/or calcium chloride and/or ethyl alcohol.
  • the immobilized water is made in the form of a gel, which is made of water and a gelling agent, preferably agarose and/or gelatine.
  • the first subgroup and the second subgroup are spot-shaped.
  • the first subgroup is spot- shaped and is surrounded with the second subgroup which is ring-shaped.
  • the second subgroup is spot- shaped and is surrounded with the first subgroup which is ring-shaped.
  • the first subgroup and the second subgroup are stripe-shaped spots.
  • the device for an irreversible indication of exceeding a set maximum temperature of frozen objects especially products which consists of a constructional element and a protective element and an indicating group containing water, that changes its colour after defrosting, is characterized according to the present invention by placing on the surface of a constructional element an indicating group containing two subgroups placed near each other that contain substances that do not mix with each other and/or do not contact each other in the stand-by condition.
  • the first subgroup is made of immobilized water, preferably containing a substance that reduces its freezing point, and indicating substances that in the signalling condition are activated by the activating substances in the water solution.
  • the second subgroup is made of immobilized water, preferably containing a substance that reduces its freezing point, and activating substances that activate the indicating substances in the signalling condition in the water solution.
  • the indicating group is sheltered with a protective element.
  • the constructional element or the protective element is provided with thermal insulation element.
  • the first subgroup and the second subgroup are placed in cavities that are connected preferably with a duct.
  • the cavities have the form of longitudinal and aligned grooves.
  • the first subgroup and the second subgroup are aligned.
  • graphic elements are fitted on a constructional element.
  • the immobilized water is made in the form of a gel, which is made of water and a gelling agent, preferably agarose and/or gelatine.
  • the indicating substance is a colour chemical indicator, preferably single-colour, and a substance activating an indicating substance is chemical buffer.
  • phenolphthalein is a colour chemical indicator
  • a substance that activates an indicating substance is a phosphate buffer.
  • the substance reducing the water freezing point is sodium chloride and/or calcium chloride and/or ethyl alcohol.
  • the device for an irreversible indication of exceeding a set maximum temperature of frozen objects especially products which consists of a constructional element and an indicating group containing water, that changes its colour after defrosting is characterized according to the present invention by placing on a waterproof constructional element or inside a waterproof constructional element, preferably with a rough surface, indicating group containing two subgroups placed near each other that contain substances that do not mix with each other and/or do not contact each other in the stand-by condition.
  • the first subgroup is made of the first gel, preferably containing a substance that reduces its freezing point, and a permanent dye that in the signalling condition moves to the water solution.
  • the second subgroup is made of the second gel. If necessary an indicating group is sheltered with a protective element.
  • the first gel contains less than 3% weight of a gelling agent.
  • the second gel contains at least 3% weight of a gelling agent and a gel structure stabilising substance, preferably glycerol.
  • the constructional element is provided with thermal insulation element
  • the first subgroup and the second subgroup are placed in separate cavities and are formed as longitudinal and aligned grooves separated with a threshold.
  • graphic indicating elements are fitted on the constructional element.
  • the first subgroup and the second subgroup are aligned and preferably there are graphic indicating elements on the constructional element.
  • the first subgroup and the second subgroup are placed in separate spatially formed compartments, preferably separated with a threshold.
  • the compartments are inside the constructional element.
  • the compartments are aligned, preferably graphic indicating elements are fitted on the constructional element.
  • the substance reducing the water freezing point is sodium chloride and/or calcium chloride and/or ethyl alcohol.
  • the device for an irreversible indication of exceeding a set maximum temperature of frozen objects especially products which consists of a constructional element and an indicating group containing water, that changes its colour after defrosting is characterized according to the present invention by placing on a waterproof constructional element or inside a waterproof constructional element, preferably with a rough surface, an indicating group containing two subgroups placed near each other that contain substances that do not mix with each other and/or do not contact each other in the stand-by condition.
  • the first subgroup is made of the first gel, preferably containing a substance that reduces its freezing point and indicating substances that in the signalling condition are activated by the activating substances in the water solution.
  • the second subgroup is made of the second gel and activating substances that activate the indicating substances in the signalling condition in the water solution. If necessary an indicating group is sheltered with a protective element.
  • the first gel contains less than 3% weight of a gelling agent.
  • the second gel contains at least 3% weight of a gelling agent and a gel structure stabilising substance, preferably glycerol.
  • the constructional element is provided with thermal insulation element.
  • the first subgroup and the second subgroup are placed in separate cavities and are formed as longitudinal and aligned grooves separated with a threshold.
  • graphic indicating elements are fitted on the constructional element.
  • first subgroup and the second subgroup are aligned and preferably there are graphic indicating elements on the constructional element.
  • the first subgroup and the second subgroup are placed in separate spatially formed compartments, preferably separated with a threshold. The compartments are inside the constructional element.
  • compartments are aligned.
  • graphic indicating elements are fitted on the constructional element.
  • the indicating substance is a colour chemical indicator, preferably single-colour, and a substance activating an indicating substance is chemical buffer.
  • phenolphthalein is a colour chemical indicator
  • a substance that activates an indicating substance is a phosphate buffer.
  • the substance reducing the water freezing point is sodium chloride and/or calcium chloride and/or ethyl alcohol.
  • the physical structure of a gel in which the immobilized water is located is damaged by the forming ice. After that the system is in the stand-by condition, i.e. ready for indication.
  • Another advantage of the invention compared to known devices is its preparation and storing that may be performed at positive temperatures.
  • the device features a simple structure and is easy to apply and store.
  • the application of the thermal insulation element provides the control of the device indication dynamics and it is possible to control the delay of indications.
  • the delay of indication may be also regulated with the distance between subgroups. Owing to the addition of substances that change a freezing point or a melting point of immobilized solutions, it is also possible to construct devices that indicate different set maximum temperatures, i.e. temperatures at which the solutions are gradually melted and released from both gels.
  • Fig. 1 presents the top view of a version of the device
  • Fig. 2 presents the section A-A of Fig. 1
  • Fig. 3 presents the top view of a version of the device
  • Fig. 4 presents the top view of a version of the device
  • Fig. 5 presents the section B-B of Fig. 4
  • Fig. 6 presents the top view of a version of the device
  • Fig. 7 presents the top view of a version of the device
  • Fig. 8 presents the top view of a version of the device
  • Fig. 9 presents the section C-C of Fig. 8
  • Fig. 10 presents the top view of a version of the device
  • Fig. 11 presents the section D-D of Fig. 10
  • Fig. 12 presents the top view of a version of the device
  • Fig. 13 presents the section E-E of Fig. 12,
  • Fig. 14 presents the top view of a version of the device before filling the constructional element by subgroups
  • Fig. 15 presents the section F-F of Fig. 14 after filling the constructional element by subgroups
  • Fig. 16 presents the top view of a version of the device after filling the constructional element by subgroups, in the signalling condition
  • Fig. 17 presents the top view of a version of the device before filling the constructional element by subgroups
  • Fig. 18 presents the section G-G of Fig. 17 after filling the constructional element by subgroups
  • Fig. 19 presents the top view of a version of the device after filling the constructional element by subgroups, in the signalling condition
  • Fig. 20 presents the top view of a version of the device before filling the constructional element by subgroups
  • Fig. 21 presents the section H-H of Fig. 20 after filling the constructional element by subgroups
  • Fig. 22 presents the top view of a version of the device after filling the constructional element by subgroups, in the signalling condition
  • Fig. 23 presents the top view of a version of the device before filling the constructional element by subgroups
  • Fig. 24 presents the section I-I of Fig. 23 after filling the constructional element by subgroups
  • Fig. 25 presents the top view of a version of the device after filling the constructional element by subgroups, in the signalling condition.
  • a constructional element 1 sized 30 x 30 mm is made of a plastic sheet with a rough surface.
  • a phosphate buffer of alkaline pH is spread in the shape of a circle with the diameter of 5 mm on the surface of the constructional element 1 with a brush.
  • a ring-shaped layer is formed between them with a drawing pen, made of 10% solution of sodium chloride and agarose in the condition shortly before solidification and the capacity of 15 mm 3 , thus creating the first subset 4.
  • the first subset 4, the second subset 5 and the third subset 6 are sheltered with a protective element 3 in the form of a small dome made of transparent and waterproof plastic.
  • a foam tape adheresive on one side
  • This device is fixed on packaging of a frozen object with a pressure-sensitive adhesive tape.
  • the water solution released from the first subset 4 reaches the second subset 5 and the third subset 6.
  • the created water solution with an alkaline reaction tinges the phenolphthalein raspberry red.
  • the resulting tinge is not changed after refreezing.
  • a constructional element 1 sized 30 x 30 mm is made of a plastic sheet with a rough surface.
  • a spot with the diameter of 5 mm is spread on the surface of the constructional element 1 with a brush.
  • the spot is made of 10% water solution of sodium chloride, a phosphate buffer with an acid reaction and agarose in the condition shortly before solidification and the capacity of 18 mm 3 .
  • the first subgroup 8a and the second subgroup 9a are sheltered with a protective element 3 in the form of a small dome made of transparent and waterproof plastic.
  • This device is fixed on packaging of a frozen object with a pressure-sensitive adhesive tape.
  • the water solution released from the first subgroup 8a reaches the second subgroup 9a.
  • the created water solution with an acid reaction tinges the methyl orange red (from yellow-orange).
  • a constructional element 1 sized 30 x 30 mm is made of a plastic sheet with a rough surface.
  • a spot with the diameter of 5 mm is spread on the surface of the constructional element 1 with a brush.
  • the spot is made of 10% water solution of sodium chloride, methyl orange and agarose in the condition shortly before solidification and the capacity of 18 mm 3 .
  • After drying this first subgroup 8b about 2 mm away a ring-shaped layer is formed with a brush, about 1 mm wide, made of phosphate buffer of acid pH, thus creating the second subgroup 9b.
  • the first subgroup 8b and the second subgroup 9b are sheltered with a protective element 3 in the form of a small dome made of transparent and waterproof plastic.
  • This device is fixed on packaging of a frozen object with a pressure-sensitive adhesive tape.
  • the water solution released from the first subgroup 8b reaches the second subgroup 9b.
  • the created water solution with an acid reaction tinges the methyl orange red (from yellow-orange).
  • the device according to Fig. 7 The same procedure is followed as in the example IV, however the first subgroup 8b and the second subgroup 9b are made in the form of stripes, 20 mm long, placed about 1 mm away from each other.
  • a constructional element 1 sized 50 x 25 mm is made of a plastic sheet with a rough surface.
  • a surface of the constructional element 1 is moulded so as to form two aligned cavities 16a and 16b in the form of grooves. The distance between the cavities 16a and 16b is 0.25 mm.
  • a mixture of 10% sodium chloride solution, 1% phenolphthalein in alcohol and agarose in the condition shortly before solidification and the total capacity of 15 mm 3 is spread in the cavity 16a with a drawing pen, thus forming the first subgroup 8c.
  • a mixture of a phosphate buffer with alkaline pH and agarose in the condition shortly before solidification and the total capacity of 15 mm 3 is spread in the cavity 16b with a drawing pen, thus forming the second subgroup 9c.
  • first subgroup 8c and the second subgroup 9c on the surface of the constructional element 1 graphic elements 14a and 14b are drawn in the form of a scale.
  • the first subgroup 8c, the second subgroup 9c and the graphic elements 14a and 14b are sheltered with a protective element 3 in the form of a small dome made of transparent and waterproof plastic.
  • the device prepared in that way is frozen and then defrosted in the constant temperature T and in the time ⁇ .
  • the device constant k is determined with the following formula: where:
  • T 0 is a maximum set temperature of indication at which the activating and/or indicating substances solutions are melted in both subgroups
  • T - a device temperature at any time in the indication condition, T - a time when the device has remained at a temperature above the set maximum temperature.
  • the above operation is performed for several different values of T and then the records of the device constant k are averaged.
  • the device is made in the same manner as in Item 1.
  • the device is fixed on packaging of a frozen product with a pressure-sensitive adhesive tape. After removing an product from a freezing system, which has become defrosted when in the system, the length / of the colour zone 11 is measured, while the following formula: where:
  • T 0 is a maximum set temperature of indication at which the activating and indicating substances solutions are melted in both subgroups
  • T - a device temperature at any time in the indication condition
  • k - a device constant is used to determine the aproximate time ⁇ , when the device, and at the same time a product, has remained at a temperature above the set maximum temperature. The resulting tinge is not changed after refreezing.
  • the device shows exceeding the set maximum temperature of a frozen product and the time when the product has remained defrosted.
  • a constructional element 1 sized 50 x 25 mm is made of a plastic sheet with a rough surface.
  • a surface of the constructional element 1 is moulded so as to form two aligned cavities 15a and 15b in the form of grooves separated with a threshold 17a.
  • the distance between the cavities 15a and 15b is 0.25 mm.
  • a mixture of 10% sodium chloride solution, a gel with 1% content of agarose and a patent blue in the condition shortly before solidification and the total capacity of 15 mm 3 is injected with a syringe into the cavity 15a, thus forming the first subgroup 8d.
  • a gel with the content of 8% agarose in the condition shortly before solidification and the total capacity of 45 mm 3 is injected with a syringe into the cavity 15b, thus forming the second subgroup 9d.
  • the contact between the two subgroups is prevented.
  • a graphic element 14c is drawn in the form of a scale.
  • the first subgroup 8d and the second subgroup 9d and the graphic element 14c are sheltered with a protective element 3 made of transparent polyethylene ' terephthalate (PET).
  • the device prepared in that way is frozen and then defrosted in the constant temperature T and in the time ⁇ .
  • T 0 is a maximum set temperature of the indication at which the substances in the first subgroup 8d are melted
  • T - a time when the device has remained at a temperature above the set maximum temperature.
  • the above operation is performed for several different values of T and then the records of the device constant k are averaged.
  • the device is made in the same manner as in Item 1.
  • the device is fixed on packaging of a frozen product with a pressure-sensitive adhesive tape. After removing a product from a freezing system, which has become defrosted when in the system, the length / of the colour zone 18a is measured, while the following formula: where:
  • T 0 is a maximum set temperature of indication at which the substances in the first subgroup 8d are melted
  • T - a device temperature at any time in the indication condition k - a device constant, is used to determine the approximate time ⁇ , when the device, and at the same time a product, has remained at a temperature above the set maximum temperature.
  • the resulting tinge is not changed after refreezing.
  • the device shows exceeding a set maximum temperature of a frozen product and the time when the product has remained defrosted.
  • a constructional element 1 sized 50 x 25 mm is made of a plastic sheet with a rough surface.
  • a surface of the constructional element 1 is moulded so as to form two aligned cavities 15c and 15d in the form of grooves separated with a threshold 17b.
  • the distance between the cavities 15c and 15d is 0.25 mm.
  • a mixture of 10% sodium chloride solution, a gel with the 1% content of agarose and 1% solution of phenolphthalein in alcohol in the condition shortly before solidification and the total capacity of 15 mm 3 is injected with a syringe into the cavity 15a, thus forming the first subgroup 8e.
  • a mixture of a gel with the content of 8% agarose and a phosphate buffer with alkaline pH in the condition shortly before solidification and the total capacity of 45 mm 3 is injected with a syringe into the cavity 15d, thus forming the second subgroup 9e.
  • the contact between the two subgroups is prevented.
  • a graphic element 14d is drawn in the form of a scale.
  • the first subgroup 8e, the second subgroup 9e and the graphic element 14d are sheltered with a protective element 3 made of transparent polyethylene terephthalate (PET).
  • the device prepared in that way is frozen and then defrosted in the constant temperature T and in the time ⁇ .
  • a contact occurs between the first subgroup 8e and the second subgroup 9e through the released water.
  • the formed water solution increases the colour zone 18b by the length /. After that the length / of the colour zone 18b created in the time ⁇ is measured.
  • the device constant k is determined with the following formula: where:
  • T 0 is a maximum set temperature of indication at which the substances in the first subgroup 8e are melted
  • T - a device temperature at any time in the indication condition, r - a time when the device has remained at a temperature above the set maximum temperature.
  • the above operation is performed for several different values of T and then the records of the device constant k are averaged.
  • the device is made in the same manner as in Item 1.
  • the device is fixed on packaging of a frozen product with a pressure-sensitive adhesive tape. After removing a product from a freezing system, which has become defrosted when in the system, the length / of the colour zone 18b is measured, while the following formula: where:
  • T 0 is a maximum set temperature of indication at which the substances in the first subgroup 8e are melted
  • T -a device temperature of at any time in the indication condition k - a device constant, is used to determine the approximate time ⁇ , when the device, and at the same time a product, has remained at a temperature above the set maximum temperature.
  • a water solution of patent blue is mixed with a gel with the 1% content of agarose forming the first mixture.
  • the composition of the first mixture is determined for the set maximum temperature in which the substances are melted.
  • the second mixture which contains 20% of glycerol and a gel with the 8% content of agarose is prepared.
  • PE transparent polyethylene
  • the second mixture in the condition shortly before solidification is sucked in 6cm length forming the second subgroup 9d.
  • To the other pipe ending the first mixture in the condition shortly before solidification is injected with a syringe in 3,5cm length forming the first subgroup 8d. The contact between the two subgroups is prevented.
  • the graphic element 14e is drawn in the form of a scale. Both endings of the pipe are sealed permanently.
  • the device prepared in that way is frozen and then defrosted in the constant temperature T and in the time ⁇ .
  • Example VII Item 1 Further procedure is in a similar way to Example VII Item 1.
  • the device is made in the same manner as in Item 1. Further procedure is in a similar way to Example VII Item 2.
  • a 1% solution of phenolphthalein in alcohol is mixed with a gel with the 1% content of agarose forming the first mixture.
  • the composition of the first mixture is determined for the set maximum temperature in which the substances are melted.
  • the second mixture which contains 20% of glycerol and a gel with the 8% content of agarose and a phosphate buffer of alkaline pH is prepared.
  • the constructional element 1 in the form of pipe length 10cm and inner diameter 2mm made of transparent polyethylene (PE) and rough inner surface the second mixture in the condition shortly before solidification is sucked in 6cm length forming the second subgroup 9e.
  • the device prepared in that way is frozen and then defrosted in the constant temperature T and in the time ⁇ .
  • Example VIII Item 1 Further procedure is in a similar way to Example VIII Item 1.
  • the device is made in the same manner as in Item 1. Further procedure is in a similar way to Example VIII Item 2.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)

Abstract

Dans des versions de la mise en œuvre du procédé de l'invention, un groupe indicateur qui comprend deux sous-groupes est formé. Dans chacun des sous-groupes est placée de l'eau immobilisée. Les sous-groupes sont formés de sorte qu'ils puissent entrer en contact par l'intermédiaire de l'eau dans la condition de signalisation. Dans certaines versions de la mise en œuvre de l'invention, une échelle temporelle est installée à côté d'un groupe indicateur. Dans une des versions, le dispositif est caractérisé en ce que, sur la surface de l'élément structurel (1) pourvu favorablement d'un élément d'isolation thermique (2), se trouve un groupe indicateur (10e) qui comprend deux sous-groupes placés l'un à côté de l'autre et qui contiennent des substances qui ne se mélangent pas et/ou n'entrent pas en contact l'une avec l'autre dans la condition d'attente. Le premier sous-groupe (8e) est fait d'un gel et un colorant permanent alors que le second sous-groupe (9e) est constitué d'un gel.
PCT/PL2008/000036 2007-05-17 2008-05-16 Procédé et dispositif pour une indication irréversible de dépassement d'une température maximum prédéterminée d'objets congelés en particulier des produits WO2008143537A1 (fr)

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
PLP-382442 2007-05-17
PL382442A PL213668B1 (pl) 2007-05-17 2007-05-17 Urządzenie do nieodwracalnego wskazania przekroczenia górnej zadanej temperatury zamrożonych produktów
PL383582A PL209532B1 (pl) 2007-10-22 2007-10-22 Sposób i urządzenie do nieodwracalnego wskazania przekroczenia górnej zadanej temperatury zamrożonych obiektów, zwłaszcza produktów
PLP-383582 2007-10-22
PLP-384135 2007-12-21
PL384135A PL214426B1 (pl) 2007-12-21 2007-12-21 Urządzenie do nieodwracalnego wskazania przekroczenia górnej zadanej temperatury zamrożonych obiektów, zwłaszcza produktów
PL384532A PL384532A1 (pl) 2008-02-22 2008-02-22 Sposób i urządzenie do nieodwracalnego wskazania przekroczenia górnej zadanej temperatury zamrożonych obiektów, zwłaszcza produktów
PLP-384532 2008-02-22
PL385132A PL215241B1 (pl) 2008-05-09 2008-05-09 Urządzenie do nieodwracalnego wskazania przekroczenia górnej zadanej temperatury zamrożonych obiektów zwłaszcza produktów
PLP-385132 2008-05-09

Publications (2)

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WO2008143537A1 true WO2008143537A1 (fr) 2008-11-27
WO2008143537A4 WO2008143537A4 (fr) 2009-01-22

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WO (1) WO2008143537A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030029373A1 (en) * 2001-08-10 2003-02-13 Isadore Cooperman Changed condition indicator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030029373A1 (en) * 2001-08-10 2003-02-13 Isadore Cooperman Changed condition indicator

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