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What it takes to make it work:
The TTI
André Fuchs
Ciba, Basel / Switzerland
What it takes to make it work:
The TTI
André Fuchs
Ciba, Basel / Switzerland
Bonn, June 2nd and 3rd, 2008
2
Overview
Monitoring of the chill chain
OnVuTM: the basic idea and how it works
The heart of OnVuTM: label, UV light and filter
The charging and labeling equipment
The system label solution
Conclusion and outlook
3
Monitoring of the chill chainData loggers and RFID tags- Supply complete temperature history- Expensive compared to TTI labels- Reader required for RFID tags- Mainly for logistics, not suitable for consumer
Time-temperature integrators (indicators)- Accumulate time-temperature history- Cost-efficient- Visual check, easy to use- Suitable for logistics and consumer
4
TTIs – important propertiesColor change of TTIs based on different chemical and biological principlesImportant for industrial application:- Activation mechanism- Storage conditions before applicationTTI activation by light: photochromic compounds(photo or phos = light; chroma = color)
ONR
NO2 N+
O
NO2
R
Lightenergy
Themalenergy
Leuco form Colored form
5
Spiropyran color fading in solutionLab experiment: spiropyran in organic solvent
Activation by UV-LED
6
Photochromism in crystalline state!Color fading and activation energies of spiropyrancrystals correspond to characteristics of bacterial growth
The OnVuTM TTI – the basic idea
ONR
NO2 N+
O
NO2
R
Light, 365 nmActivation
HeatFading
A, colorless B, dark blue
7
Color fading depending on time + temperature
Activation by UV light
Before activation
Time
T
How does the OnVuTM TTI work?
8
TTI characterization by colormeasurement
CIE Lab color system, measurement by spectrometersCharacterization of TTI activation (= charging) and color fading
222 baLE ++=
54
58
62
66
70
74
78
82
86
90
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Time [d]
E va
lue
TTI
Reference color
UV light
9
Charging energy and shelf life
54
58
62
66
70
74
78
82
0 2 4 6 8 10 12 14 16 18
Time [d]
E va
lue
80 mJ×cm-²
100 mJ×cm-²
130 mJ×cm-²
170 mJ×cm-²
Referencecolor
Starting color of TTI can be modified by charging energy High flexibility to match different time-temperature conditions
ExampleOnVuTM B1 label, different charging energies, at 4 °C
10
Label
Lightsourcefor activation
Filter(TTR)
TTR: thermotransfer ribbon
The heart of OnVuTM: label, UV light and filter
Filter required for reversible irreversible system
11
The protective filter – UV absorption
High UV barrier in the UVA range (365 nm)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
340 350 360 370 380 390 400 410 420 430 440 450
Wavelength [nm]
Abs
orba
nce
TTR filter
PSA filter label
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The making of … the OnVuTM labelR&DFreshPointCiba
Ink productionCiba
OnVuTM label printingBizerba P+E
TTI pigment productionCiba
R&DCiba
Identification of suitable pigments in R&D labsColorimetric characterization of TTI fading under different conditions (charging energy, temperature) and definition of reference colorRegistration of pigments including toxicological testingTechnical documentation (specification, handling & storage) and quality testing for each production step
Special know-how for printing of OnVuTM labels required
13
Flexo press Printed OnVuTM labels
OnVuTM label printing at Bizerba P+EPrinting of active TTI using water based flexo ink
Control of printing parameters is vital for constant high TTI quality
Bizerba P+E is certified for the manufacturing of OnVuTM labels
14
Development of new charging equipment for OnVuTM labels based on UV LEDs
Integration of TTI charging unit into existing label dispensers of Bizerba
Modification of thermal transfer unit for TTR filter application
Extensive testing of the complete system under realistic conditions: TTI label + TTR filter + charging and dispensing equipment
Shine some light on me – the TTI charging equipment
TTI charging by UV light
Thermal transfer of filter on charged TTI
Dispensing of label / filter combination on product package
15
Industrial label dispensers from BizerbaGLP-TTI for manual label application (10 to 20 labels per min)LDI-TTI for automatic label application (100 labels per min)
GLP-TTI
LDI-TTI
OnVuTM charging and labelingequipment
16
The OnVuTM system label
Production
Retail
2D matrix code on label with tracing data (charging date and energy, batch no., product shelf life)
B1B1
17
OutlookSpecial label for visual check of the Logistics chainDevelopment of TTIs for frozen foodDevelopment of TTIs for longer shelf life (3 to 4 weeks)
B-L
Logistics
A
BC
D
B-L
Logistics
A
BC
D
18
Benefits of the OnVuTM TTIStable and reproducible color fading based on photochromicpigments
Cost-efficient manufacturing of TTI labels
Defined activation at the point of packaging
Simple storage and handling of TTI labels
High flexibility through variable charging
Charging, filter application and label dispensing of OnVuTM
labels under typical industrial conditions using one machine
Conclusions
19
The partners of the OnVuTM project
Dr. Hans ReichertDr. Leonhard FeilerTracey NisbetDr. André Fuchs
Professor Dr. Yoav EichenProfessor Dr. Dietrich Haarer
Michael FeuerstackUwe JannaschDr. Winfried BückenMarkus Uber
… and many helping hands in all companies!
20
EU projects - involved institutes
Maria Smolander et. al
Petros Taoukis et. alBrigitte Petersen et. al
Yee Hilz et. al
21
www.onvu.com
Thank you for your kind attention !