DE19904935A1 - Temperature sensor consisting of a plaster which reacts with a dye envelope when a threshold temperature is exceeded, to produce an irreversible color change. - Google Patents

Temperature sensor consisting of a plaster which reacts with a dye envelope when a threshold temperature is exceeded, to produce an irreversible color change.

Info

Publication number
DE19904935A1
DE19904935A1 DE1999104935 DE19904935A DE19904935A1 DE 19904935 A1 DE19904935 A1 DE 19904935A1 DE 1999104935 DE1999104935 DE 1999104935 DE 19904935 A DE19904935 A DE 19904935A DE 19904935 A1 DE19904935 A1 DE 19904935A1
Authority
DE
Germany
Prior art keywords
temperature
color change
exceeded
plaster
envelope
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
DE1999104935
Other languages
German (de)
Inventor
Peter Wernig
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Priority to DE1999104935 priority Critical patent/DE19904935A1/en
Publication of DE19904935A1 publication Critical patent/DE19904935A1/en
Withdrawn legal-status Critical Current

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D79/00—Kinds or details of packages, not otherwise provided for
    • B65D79/02—Arrangements or devices for indicating incorrect storage or transport

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

A temperature sensor consisting of a plaster which reacts irreversibly with a dye envelope when a threshold temperature is exceeded, is new. The color change and the envelope temperature can be selected. The plaster consists of round polyvinyl chloride (PVC) films, an adhesive layer and a round cetylpalmitate disc.

Description

Die Erfindung betrifft Temperatursensoren, die dadurch gekennzeichnet sind, daß sie bei Überschreiten einer vorgegebenen Temperatur, irreversibel einem dauerhaften Farbwechsel unterliegen. Insbesondere ist der Farbwechsel nicht rückgängig zu machen und dokumentiert retrospektiv das Überschreiten einer vorgegebenen Temperatur.The invention relates to temperature sensors are characterized in that when a predetermined temperature, irreversible a permanent Subject to color changes. In particular, the color change irreversible and documented retrospectively exceeding a predetermined temperature.

Die Art der Farben beim Farbumschlag, ebenso wie die Temperatur sind wählbar.The type of color when changing color, as well as the Temperature can be selected.

Die Geräte können beispielsweise pflasterartig als Temperatursiegel auf die Verpackungen wärmeempfindlicher Verkaufsprodukte (z. B. photographische Filme, magnetische Datenträger, Schokolade, Medikamente etc.) aufgeklebt werden. Sie erlauben eine Qualitätskontrolle auf eventuelle hitzebedingte Schädigung des Produktes während Lagerung und Transport.The devices can, for example, as a plaster Temperature seals on the packaging more heat sensitive Sales products (e.g. photographic films, magnetic Disk, chocolate, medication etc.) stuck on become. They allow quality control for any heat-related damage to the product during storage and transportation.

Die erfindungsgemäß benannten Temperatursensoren, die im folgenden als Temperatursiegel bezeichnet werden, sind vorzugsweise sandwichartig aus Plastikfolien aufgebaut. Kernstück der Temperatursiegel ist eine dünne Lage Wachs, die auf einem farbigen, saugfähigen Textiluntergrund, vorzugsweise Filz, fixiert wird. Bei Erreichen des Schmelzpunktes wird das verflüssigte Wachs durch Kapillarwirkung vom saugfähigen Untergrund aufgesogen, dessen Farbe darauf sichtbar wird. Dieser Farbumschlag ist durch ein Sichtfenster, das oberhalb der Wachsschicht angebracht ist und Teil der Verkapselung der Wachs/Filz-Lage darstellt, feststellbar.The temperature sensors named according to the invention, which in hereinafter referred to as temperature seals, are preferably sandwiched from plastic films. The core of the temperature seal is a thin layer of wax, on a colored, absorbent textile surface, preferably felt. When the The liquefied wax becomes melting point Capillary action is absorbed by the absorbent surface Color is visible on it. This color change is through  a viewing window attached above the wax layer and is part of the encapsulation of the wax / felt layer, noticeable.

Die Verkapselung besteht vorzugsweise aus Klebefolien. The encapsulation preferably consists of adhesive films.  

Beispiel 1example 1

Ein Beispiel für den Aufbau eines Temperatursiegels, das bei 53 Grad Celsius einen irreversiblen Farbwechsel von weiß nach schwarz gibt, ist wie folgt (s. Zeichnung 1): 1 PVC-Folie (Kreisdurchmesser 20 mm mit 6 mm konzentrischer Kreislochung in der Mitte, Dicke 0,2 mm).
2 PVC-Folie (Kreisdurchmesser 8 mm, Dicke 0,2 mm).
3 Kreisrunde, 0,5 mm dicke Scheibe aus Cetylpalmitat (Durchmesser 8 mm).
4 Kreisrunde 1 mm dicke Lage aus schwarzem Filz mit Durchmesser 12 mm,
5 Kreisrunde PVC Folie mit Durchmesser 20 mm und 0,2 mm Dicke.
6 Klebeschicht (Kreisdurchmesser 20 mm).
An example of the structure of a temperature seal that gives an irreversible color change from white to black at 53 degrees Celsius is as follows (see drawing 1): 1 PVC film (circle diameter 20 mm with 6 mm concentric circular perforation in the middle, thickness 0.2 mm).
2 PVC film (circle diameter 8 mm, thickness 0.2 mm).
3 circles, 0.5 mm thick disc made of cetyl palmitate (diameter 8 mm).
4 circular 1 mm thick layers of black felt with a diameter of 12 mm,
5 circular PVC film with a diameter of 20 mm and a thickness of 0.2 mm.
6 adhesive layer (circle diameter 20 mm).

Der Zusammenhalt der Schichten wird durch Verklebung der Ränder erzielt.The layers are held together by gluing the edges scored.

Claims (1)

Temperatursensoren finden im täglichen Leben und der Arbeitswelt vielfach Anwendung. Die weitaus meisten dieser Geräte folgen lediglich dem aktuellen Temperaturverlauf und lassen retrospektiv keine Aussage darüber zu, ob eine bestimmte Temperatur zuvor überschritten wurde. Hierfür gibt es auf dem Prinzip der Wärmeausdehnung beruhende Minima-Maxima-Thermometer und strombetriebene elektronische Schaltungen. Die letztgenannten Geräte sind für die Dokumentation der Überschreitung einer vorgegebenen Solltemperatur nicht immer verwendbar, da sie für Einmalmessungen zu teuer, sterisch aufwendig, oder wegen ihrem Quecksilbergehalt nur eingeschränkt verwendungsfähig sind. Außerdem sind die genannten Meßgeräte für Dokumentationszwecke ungeeignet, da sie ohne aufwendige Zusatzmaßnahmen (z. B. Verblombung) leicht rückstellbar sind.
Das Patent beschreibt und erhebt Anspruch auf einen in der Beschreibung gegebenen Temperatursensor, der auf Überschreitung einer Solltemperatur mit einem irreversiblen, dauerhaften Farbumschlag reagiert. Der erfindungsgemäße Temperatursensor kann als Pflaster auf eine hitzeverderbliche Ware aufgeklebt werden und fungiert während Lagerung und Transport der Ware als ein Temperatursiegel. Der Endverbraucher kann an dem vorzugsweise auf der Verpackung angebrachten Temperatursiegel anhand der Farbe feststellen, ob die innenliegende Ware hitzegeschädigt ist.
Bei den erfindungsgemäß genannten Temperatursiegeln kann die Art des Farbwechsels und die Umschlagtemperatur gewählt werden.
Der Patentanspruch erstreckt sich auf den Gegenstand der Erfindung, seine Konstruktion und seine Einsatzmöglichkeiten.Temperature sensors are widely used in everyday life and work. The vast majority of these devices only follow the current temperature profile and, retrospectively, do not allow any statements to be made as to whether a certain temperature was previously exceeded. There are minimum-maximum thermometers based on the principle of thermal expansion and current-operated electronic circuits. The latter devices are not always usable for documenting the exceeding of a predetermined target temperature, since they are too expensive, sterically complex for one-time measurements, or are of limited use due to their mercury content. In addition, the measuring devices mentioned are unsuitable for documentation purposes, since they can be easily reset without complex additional measures (e.g. sealing).
The patent describes and claims a temperature sensor given in the description, which reacts with an irreversible, permanent color change when a target temperature is exceeded. The temperature sensor according to the invention can be applied as a plaster to heat-perishable goods and acts as a temperature seal during storage and transportation of the goods. The end user can use the temperature seal on the packaging to determine whether the goods inside are damaged by heat.
In the case of the temperature seals mentioned according to the invention, the type of color change and the envelope temperature can be selected.
The claim extends to the subject matter of the invention, its construction and its possible uses.
DE1999104935 1999-02-06 1999-02-06 Temperature sensor consisting of a plaster which reacts with a dye envelope when a threshold temperature is exceeded, to produce an irreversible color change. Withdrawn DE19904935A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1999104935 DE19904935A1 (en) 1999-02-06 1999-02-06 Temperature sensor consisting of a plaster which reacts with a dye envelope when a threshold temperature is exceeded, to produce an irreversible color change.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1999104935 DE19904935A1 (en) 1999-02-06 1999-02-06 Temperature sensor consisting of a plaster which reacts with a dye envelope when a threshold temperature is exceeded, to produce an irreversible color change.

Publications (1)

Publication Number Publication Date
DE19904935A1 true DE19904935A1 (en) 2000-08-17

Family

ID=7896696

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1999104935 Withdrawn DE19904935A1 (en) 1999-02-06 1999-02-06 Temperature sensor consisting of a plaster which reacts with a dye envelope when a threshold temperature is exceeded, to produce an irreversible color change.

Country Status (1)

Country Link
DE (1) DE19904935A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10325714B3 (en) * 2003-06-06 2004-10-14 Herrmann, Karsten Indicator element for showing when a predetermined temperature has been exceeded comprises an encapsulated indicator dissolved or emulsified in a liquid phase
EP3398878A4 (en) * 2016-02-09 2019-08-14 Toppan Printing Co., Ltd. Instant noodles container lid

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8435794U1 (en) * 1984-12-06 1985-01-24 Mallinckrodt Diagnostica (Germany) GmbH, 6057 Dietzenbach Device for the detection of temperature overruns during the storage and shipping of temperature sensitive materials
DE29501435U1 (en) * 1995-01-30 1995-05-24 Spiess, Wolfgang, 88521 Ertingen Label with temperature display for temperature sensitive food
DE29718715U1 (en) * 1997-10-09 1997-11-27 Kalle Nalo GmbH, 65203 Wiesbaden Sausage casing with optically variable security and marking elements
DE19711191A1 (en) * 1997-03-19 1998-09-24 Volker Dr Stoldt Self-adhesive temperature gauge for carriage of sensitive products, including foodstuffs

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8435794U1 (en) * 1984-12-06 1985-01-24 Mallinckrodt Diagnostica (Germany) GmbH, 6057 Dietzenbach Device for the detection of temperature overruns during the storage and shipping of temperature sensitive materials
DE29501435U1 (en) * 1995-01-30 1995-05-24 Spiess, Wolfgang, 88521 Ertingen Label with temperature display for temperature sensitive food
DE19711191A1 (en) * 1997-03-19 1998-09-24 Volker Dr Stoldt Self-adhesive temperature gauge for carriage of sensitive products, including foodstuffs
DE29718715U1 (en) * 1997-10-09 1997-11-27 Kalle Nalo GmbH, 65203 Wiesbaden Sausage casing with optically variable security and marking elements

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10325714B3 (en) * 2003-06-06 2004-10-14 Herrmann, Karsten Indicator element for showing when a predetermined temperature has been exceeded comprises an encapsulated indicator dissolved or emulsified in a liquid phase
EP3398878A4 (en) * 2016-02-09 2019-08-14 Toppan Printing Co., Ltd. Instant noodles container lid

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8122 Nonbinding interest in granting licenses declared
8139 Disposal/non-payment of the annual fee