WO1998002722A1 - Method and indicator for indicating thawing - Google Patents
Method and indicator for indicating thawing Download PDFInfo
- Publication number
- WO1998002722A1 WO1998002722A1 PCT/IL1997/000229 IL9700229W WO9802722A1 WO 1998002722 A1 WO1998002722 A1 WO 1998002722A1 IL 9700229 W IL9700229 W IL 9700229W WO 9802722 A1 WO9802722 A1 WO 9802722A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- microcapsule walls
- indicator
- freeze
- undergone
- color change
- Prior art date
Links
Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/008—Alarm devices
Definitions
- the present invention relates to a method for indicating whether an
- An object of the present invention is to provide a simple, low cost, and
- Another object of the invention is to provide an indicator for use in such method.
- microcapsule walls enclosed within microcapsule walls, and a second material normally separated
- the first material further including a liquid which, when frozen,
- the liquid which expands when frozen is water. Also,
- the indicator includes a rigid housing enclosing the first and second materials and
- the color change substance in the second material is an
- the first material provides a weak acid environment
- freeze-thaw indicator for application to articles, particularly food articles to provide
- Fig. 1 schematically illustrates one form of freeze-thaw indicator
- Fig. 2a illustrates one of the microcapsules in the indicator of Fig. 1 in the normal condition of the capsules
- Fig. 2b illustrates the microcapsule of Fig. 2a, but in its ruptured
- Figs. 3a, 3b and 3c illustrate three phases in the operation of the
- Fig. 4 schematically illustrates the indicator of Fig. 1 incorporated in a
- Fig. 4a is an enlarged sectional view along IVa. Va of Fig. 4.
- Fig. 4b illustrates a modification in the construction of Fig. 4a.
- Fig 1 there is illustrated a freeze-thaw sequence
- the first material 3 includes a liquid which,
- freeze-thaw sequence Housing 6 enclosing the two materials 3 and 5 is rigid to
- Fig 3b illustrates the microcapsule walls 4 enclosing the first material
- microcapsule walls 4 causes the first material to expand and therefore to
- FIG. 3c illustrates the condition wherein
- Fig 4 illustrates the freeze-thaw sequence indicator 2 applied to a
- packaged food article such as a fish or meat product
- two color- change materials 3, 5, are normally colorless or transparent so that the
- the rigid housing 11 containing the two materials 3, 5 the rigid housing 11 containing the two materials 3, 5
- FIG. 4a illustrates another example wherein the
- the color former substance of the second material 5 is a
- the substance of the first (encapsulated) material 3 provides a weak acid environment and includes water which expands when frozen to rupture
- Leucodyes is the name given to colorless chemical substances that
- the encapsulated material is the water plus weak acid
- a preferable weak acid environment for the encapsulated material is a water solution of citric acid or acetic acid
- microcapsule walls In the present invention, the microcapsule walls are ruptured
- the core liquid preferably water, which is expanded when frozen
- Microencapsulation is a well established technology used in a variety of materials.
- microcapsules are based on the polarity between the two immiscible phases, oil and water, which in turn enables the
- microcapsule walls are of polyurea, and its structural features include the ability to
- microcapsules flows into the surrounding continuous phase containing the
- the continuous phase can be, for example, a solution of leucodyes in
- organic solvents preferably an aromatic oil or ester containing benzene rings
- a color former such as ones made and
- the immiscible phase is composed of granules of citric acid
- a preferred leucodye is one made by Hilton-Davis Corporation of
- Water-loaded polyurea microcapsules were prepared by making use of
- citric acid instead of citric acid, there may be also used acetic acid, or other weak
- encapsulated microcapsules are prepared with cyclohexane in the water
- immiscible phase is edible, but also the process allows placing microcapsules of
- microcapsules with each batch containing microcapsules of the same size, but
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97928418A EP0886768A4 (en) | 1996-07-11 | 1997-07-08 | GEL-DEFROST CYCLE PROCESS AND INDICATOR |
BR9711806A BR9711806A (pt) | 1996-07-11 | 1997-07-08 | M-todo e indicador para a indica-Æo de descongelamento |
IL12798997A IL127989A0 (en) | 1996-07-11 | 1997-07-08 | Method and indicator for indicating thawing |
JP50580998A JP2003519461A (ja) | 1996-07-11 | 1997-07-08 | 解凍を表示する方法および指示器 |
AU32721/97A AU757162B2 (en) | 1996-07-11 | 1997-07-08 | Method and indicator for indicating thawing |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IL118840 | 1996-07-11 | ||
IL11884096A IL118840A0 (en) | 1996-07-11 | 1996-07-11 | A colored indication for possible spoilage of frozen foods |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998002722A1 true WO1998002722A1 (en) | 1998-01-22 |
Family
ID=11069066
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IL1997/000229 WO1998002722A1 (en) | 1996-07-11 | 1997-07-08 | Method and indicator for indicating thawing |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0886768A4 (ja) |
JP (1) | JP2003519461A (ja) |
AU (1) | AU757162B2 (ja) |
BR (1) | BR9711806A (ja) |
CA (1) | CA2260184A1 (ja) |
IL (1) | IL118840A0 (ja) |
WO (1) | WO1998002722A1 (ja) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE20000317U1 (de) * | 2000-01-08 | 2001-06-07 | Trender Lutz | Vorrichtung zur bleibenden, dauerhaften Detektion und Darstellung einer Über-/Unterschreitung einer fest vorgegebenen Temperatur |
US6679070B1 (en) * | 2002-08-29 | 2004-01-20 | Winterlab | Method for identifying thawed and refrozen products |
DE102006045821A1 (de) * | 2006-09-28 | 2008-04-03 | Wötzer, Philipp | Anzeigevorrichtung und Gefriergutverpackung |
US8430053B2 (en) | 2010-09-30 | 2013-04-30 | Temptime Corporation | Color-changing emulsions for freeze indicators |
RU2538450C1 (ru) * | 2013-10-16 | 2015-01-10 | Игорь Николаевич Кочергин | Индикатор холода |
DE102016005070A1 (de) * | 2016-04-27 | 2017-11-02 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Vorrichtung und Verfahren zur Temperaturüberwachung einer kryokonservierten biologischen Probe |
CN112396949A (zh) * | 2019-08-13 | 2021-02-23 | 余丽 | 一种环境友好型低温保护失效提示标签的激活方法 |
US11085834B2 (en) | 2016-04-27 | 2021-08-10 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E. V. | Device and method for monitoring the temperature of a cryogenically preserved biological sample |
US11166454B2 (en) | 2016-04-27 | 2021-11-09 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E. V. | Method and device for the temperature monitoring of a cryopreserved biological sample |
US11606952B2 (en) | 2016-04-27 | 2023-03-21 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Method and device for the temperature monitoring of a cryopreserved biological sample |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015159803A (ja) * | 2014-02-28 | 2015-09-07 | 三菱レイヨン株式会社 | 冷凍品が解凍された回数を判別するための核酸及び該核酸を用いた冷凍品が解凍された回数を判別する方法 |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3177843A (en) * | 1964-02-13 | 1965-04-13 | Robert S Geocaris | Frozen food indicator |
US3786777A (en) * | 1970-12-31 | 1974-01-22 | Artech Corp | Irreversible warm-up indicator |
US3844718A (en) * | 1972-05-01 | 1974-10-29 | H Cohen | Frozen food defrosting indicator |
US3888631A (en) * | 1972-04-11 | 1975-06-10 | Oskar Edwin Sturzinger | Temperature indicator |
US3967579A (en) * | 1975-10-29 | 1976-07-06 | Stanton H. Kaye | Telltale device |
US4022149A (en) * | 1976-02-06 | 1977-05-10 | Lee Berger | Thaw indicator |
US4145918A (en) * | 1976-09-07 | 1979-03-27 | Akzona Incorporated | Freeze-thaw indicator |
US4163427A (en) * | 1977-12-05 | 1979-08-07 | Isadore Cooperman | Freeze-thaw indicator apparatus |
US4327117A (en) * | 1980-03-18 | 1982-04-27 | Lenack Roger D | Thaw indicator for frozen foods |
US4643588A (en) * | 1984-04-25 | 1987-02-17 | Ciba-Geigy Ag | Method of monitoring temperature |
US5325721A (en) * | 1993-02-17 | 1994-07-05 | Minnesota Mining And Manufacturing Company | System for indicating exposure to preselected temperatures or tampering |
-
1996
- 1996-07-11 IL IL11884096A patent/IL118840A0/xx unknown
-
1997
- 1997-07-08 EP EP97928418A patent/EP0886768A4/en not_active Withdrawn
- 1997-07-08 CA CA002260184A patent/CA2260184A1/en not_active Abandoned
- 1997-07-08 BR BR9711806A patent/BR9711806A/pt not_active IP Right Cessation
- 1997-07-08 AU AU32721/97A patent/AU757162B2/en not_active Ceased
- 1997-07-08 WO PCT/IL1997/000229 patent/WO1998002722A1/en not_active Application Discontinuation
- 1997-07-08 JP JP50580998A patent/JP2003519461A/ja active Pending
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3177843A (en) * | 1964-02-13 | 1965-04-13 | Robert S Geocaris | Frozen food indicator |
US3786777A (en) * | 1970-12-31 | 1974-01-22 | Artech Corp | Irreversible warm-up indicator |
US3888631A (en) * | 1972-04-11 | 1975-06-10 | Oskar Edwin Sturzinger | Temperature indicator |
US3844718A (en) * | 1972-05-01 | 1974-10-29 | H Cohen | Frozen food defrosting indicator |
US3967579A (en) * | 1975-10-29 | 1976-07-06 | Stanton H. Kaye | Telltale device |
US4022149A (en) * | 1976-02-06 | 1977-05-10 | Lee Berger | Thaw indicator |
US4145918A (en) * | 1976-09-07 | 1979-03-27 | Akzona Incorporated | Freeze-thaw indicator |
US4163427A (en) * | 1977-12-05 | 1979-08-07 | Isadore Cooperman | Freeze-thaw indicator apparatus |
US4327117A (en) * | 1980-03-18 | 1982-04-27 | Lenack Roger D | Thaw indicator for frozen foods |
US4643588A (en) * | 1984-04-25 | 1987-02-17 | Ciba-Geigy Ag | Method of monitoring temperature |
US5325721A (en) * | 1993-02-17 | 1994-07-05 | Minnesota Mining And Manufacturing Company | System for indicating exposure to preselected temperatures or tampering |
Non-Patent Citations (1)
Title |
---|
See also references of EP0886768A4 * |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE20000317U1 (de) * | 2000-01-08 | 2001-06-07 | Trender Lutz | Vorrichtung zur bleibenden, dauerhaften Detektion und Darstellung einer Über-/Unterschreitung einer fest vorgegebenen Temperatur |
US6679070B1 (en) * | 2002-08-29 | 2004-01-20 | Winterlab | Method for identifying thawed and refrozen products |
DE102006045821A1 (de) * | 2006-09-28 | 2008-04-03 | Wötzer, Philipp | Anzeigevorrichtung und Gefriergutverpackung |
WO2008037478A1 (de) * | 2006-09-28 | 2008-04-03 | Woetzer Philipp | Anzeigevorrichtung und gefriergutverpackung |
US8430053B2 (en) | 2010-09-30 | 2013-04-30 | Temptime Corporation | Color-changing emulsions for freeze indicators |
RU2538450C1 (ru) * | 2013-10-16 | 2015-01-10 | Игорь Николаевич Кочергин | Индикатор холода |
DE102016005070A1 (de) * | 2016-04-27 | 2017-11-02 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Vorrichtung und Verfahren zur Temperaturüberwachung einer kryokonservierten biologischen Probe |
US11085834B2 (en) | 2016-04-27 | 2021-08-10 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E. V. | Device and method for monitoring the temperature of a cryogenically preserved biological sample |
US11166454B2 (en) | 2016-04-27 | 2021-11-09 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E. V. | Method and device for the temperature monitoring of a cryopreserved biological sample |
US11549851B2 (en) | 2016-04-27 | 2023-01-10 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E. V. | Device and method for monitoring the temperature of a cryopreserved biological sample |
US11606952B2 (en) | 2016-04-27 | 2023-03-21 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Method and device for the temperature monitoring of a cryopreserved biological sample |
CN112396949A (zh) * | 2019-08-13 | 2021-02-23 | 余丽 | 一种环境友好型低温保护失效提示标签的激活方法 |
Also Published As
Publication number | Publication date |
---|---|
BR9711806A (pt) | 1999-08-24 |
EP0886768A4 (en) | 1999-09-15 |
AU3272197A (en) | 1998-02-09 |
IL118840A0 (en) | 1996-10-31 |
AU757162B2 (en) | 2003-02-06 |
CA2260184A1 (en) | 1998-01-22 |
JP2003519461A (ja) | 2003-06-17 |
EP0886768A1 (en) | 1998-12-30 |
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