Date post: | 19-Dec-2015 |
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CS need keeping wet for refresh.But laminate film may not be enough.
CS package film:PET 15μm/Al 7μm/PE 60μm
Al is originally perfect against water vapor.
But Al foil has pinhole (~ 10/m2).
And the face of seal part isn’t covered with Al.
So we have to check.
Set UpSize; 12.5×10cm2 (opera
emulsion)
Contents; sample cotton wool+water (2g) reference cotton
20 packages for each type
Storage environment; 40˚C(Yamato Program Incubator IN61)
—watching the change of weight of these packages.
Weigh these packages Electronic Balance
(AND FA-200)
max = 210g
min scale = 0.001g
—weighing Al cluster every time to check the state of the balance.
—These changes are so small that I weigh 20 packages at the same time.
0
50
100
150
200
250
300
178.74 178.75 178.76 178.77
weight (g)
DATAfitting
σ 0.0014g
Weight of Packages
138.3
138.31
138.32
138.33
138.34
138.35
138.36
138.37
138.38
10/ 11 10/ 31 11/ 20 12/ 10 12/ 30 1/ 19 2/ 8
date
sample(g)
97.97
97.98
97.99
98
98.01
98.02
98.03
98.04
98.05reference(g)
samplereference
10mg
Weight of Packages and Humidity
- 0.04
- 0.03
- 0.02
- 0.01
0
0.01
0.02
0.03
10/ 21 10/ 31 11/ 10 11/ 20 11/ 30 12/ 10
chan
ge o
f w
eigh
t (g
)
0
10
20
30
40
50
60
70
hum
idity
(%)
referencesamplehumidity
Weight of Packages and HumidityWeight of packages depend on humidity.In fact, PET is generally absorbent (0.1-
2.5%).
0
0.05
0.1
0.15
0.2
0.25
0 500 1000 1500 2000
time (m)
the
wei
ght
incr
ease
d (g
)
samplereference
97.98
98
98.02
98.04
98.06
20 40 60Humidity (%)
Refe
renc
e (g
)
138.3
138.32
138.34
138.36
138.38
Sam
ple (
g)
referencesample
20%45%