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Dual-function heat indicator and method of manufacture

An indicator, dual-function technology, applied in the field of visual indicators, which can solve problems such as degradation, failure quality, etc.

Active Publication Date: 2015-03-18
TEMPTIME CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Many commercial products are heat sensitive and will fail or degrade if they experience excessive ambient heat exposure prior to use

Method used

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  • Dual-function heat indicator and method of manufacture
  • Dual-function heat indicator and method of manufacture
  • Dual-function heat indicator and method of manufacture

Examples

Experimental program
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Effect test

preparation example Construction

[0149] The coating composition can be prepared, for example, by the method of preparing a peak indicator composition described herein, except without the first reactant and the second reactant. Thus, the color forming function of the first reactant and the second reactant can be replaced by the meltable particulate colored material. Using the previously described example of black dyed hecosane wax, prior to activation of the peak exposure indicator, the dyed wax particles may have a light color such as white due to light scattering. However, the inherent black color of the dyed wax particles quickly becomes apparent after the hehenicane wax melts in response to exposure to ambient temperatures of about 40°C or greater (the melting point of the heicanodecane wax). After melting, the small, dyed wax particles coalesce and cease to scatter light, revealing their inherent color.

[0150]In another aspect, example embodiments of the present invention provide a thermal event indica...

Embodiment 1

[0192] Example 1: Fabrication of a dual heat indicator prototype

[0193] Prototype indicators were fabricated by laminating VVM14-type cumulative heat indicators printed on transparent film to commercially available thermal paper or prefabricated thermal paper. The VVM14-type cumulative heat indicator is a prototype cumulative heat indicator formulated to respond to approximately 14 days at 37°C, and is expected to be similar to the commercially available HEATmarker VVM14 (available from Temptime Corporation). VVM14 has good temperature characteristic response characteristics and is manufactured to meet the World Health Organization requirements in PQS Performance Specification, Vaccine Vial Monitor WHO / PQS / E06 / IN05.2 of 26 July 2011. It responded in 14 days at 37°C, 90 days at 25°C and over 3 years at 5°C. Prototype indicators were fabricated on a Gallus 250I press. Two trials were performed, the latter evaluating a thinner clear polyester film as an improvement. Both set...

Embodiment 2

[0206] Example 2: For illustration Figure 7 The dual heat indicator prototype of the example embodiment shown in

[0207] A prototype dual heat indicator was fabricated by hand by laminating a VVM14-type cumulative heat indicator printed on a transparent film to a commercially available or prefabricated threshold indicator. Cumulative indicator components were printed on DuPont Teijin Films using a Gallus 250I printing press with color shifting "active" diacetylene ink and static "reference ink" TM Made in 561, DuPont Teijin Films TM 561 is a 0.005 inch thick clear polyester film. "Active" inks are manufactured in-house by dispersing "KE" (2,4-Hexadiyn-1,6-bis(ethylurea)) powder in a solvent-based nitrocellulose ink according to the procedure of US Patent 8067483 of. The amount of KE in the ink and the amount of ink applied to the polyester film was chosen such that a color match between the temperature-sensitive reactive ink and the temperature-insensitive reference ...

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Abstract

A dual-function heat indicator for monitoring two or more modes of heat exposure is described. A manufacturing process for the dual-function heat indicator is also described. Dual-function heat indicators as described may be useful for monitoring the exposure of host products, with which the dual-function heat indicators may be associated, to cumulative ambient heat exposure and to a peak ambient heat exposure, and for other purposes.

Description

technical field [0001] The present invention generally relates to visual indicators of temperature history, including peak temperature exposure indicators, cumulative time temperature indicators, and dual peak and cumulative time-temperature indicators. [0002] priority [0003] This application claims priority to U.S. Patent Application No. 61 / 645,889, filed May 11, 2012, entitled "Dual-Function Heat Indicator and Method of Manufacture," the contents of which are incorporated herein by reference in their entirety . Background technique [0004] Many commercial products are heat sensitive and will fail or degrade if they experience excessive environmental heat exposure prior to use. Examples of heat sensitive commercial products include certain pharmaceuticals, medical products and foods as well as some industrial products. Accordingly, time-temperature indicators have been provided which can monitor the cumulative ambient heat exposure of a subject product and signal wh...

Claims

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Application Information

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IPC IPC(8): G01K11/12
CPCG01N21/78G01K11/12G01K3/04G01K11/06G01K1/02G01K11/16G01N31/229
Inventor 泰德奥斯·普斯基道恩·E·史密斯迪恩·H·泰勒拉奎拔·豪可·阿诺德
Owner TEMPTIME CORP
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