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Moisture-proof packaging design
Packing with packing material with breathable and Completely sealed packing.
I will design a moisture-proof packaging.
Answer 1| 3091ｇ 2| 562ｇ
packing by the parcel materials with the moisture permeability
For a completely sealed packing
Item code:
W: fees desiccant (g)
R: moisture permeability of moisture-proof packaging material at 40 deg C
(g/m2 · 24 hours moisture permeability)
A: surface area of moisture-proof packaging material (m2)
t: storage days (days)
h1: The average humidity of the ambient air during storage (RH%)
h2: average humidity inside packaging during storage (RH%)
K1:By the constant average temperature θ packaging materials and air:
C1: desiccant moisture absorption rate at the start of use (%)
C2: desiccant moisture absorption rate in the maximum allowable humidity inside packaging (%)
K2:By the coefficient of hygroscopic material inside packing:
D: the weight of the hygroscopic material inside the packaging (g)
K1 Packaging material and the ambient air temperature by the average.
| Film/ |
40 |
35 |
30 |
25 |
20 |
15 |
10 |
5 |
| PET |
11.1*10-3 |
7.3*10-3 |
4.9*10-3 |
3.1*10-3 |
2.0*10-3 |
1.27*10-3 |
0.81*10-3 |
0.48*10-3 |
| LDPE |
11.1*10-3 |
7.0*10-3 |
4.5*10-3 |
2.8*10-3 |
1.8*10-3 |
1.05*10-3 |
0.63*10-3 |
0.36*10-3 |
| HDPE |
11.1*10-3 |
6.9*10-3 |
4.4*10-3 |
2.7*10-3 |
1.7*10-3 |
1.00*10-3 |
0.59*10-3 |
0.33*10-3 |
| PP |
11.1*10-3 |
6.9*10-3 |
4.3*10-3 |
2.5*10-3 |
1.6*10-3 |
0.92*10-3 |
0.53*10-3 |
0.29*10-3 |
| PVDC |
11.1*10-3 |
6.9*10-3 |
3.9*10-3 |
2.2*10-3 |
1.3*10-3 |
0.74*10-3 |
0.40*10-3 |
0.21*10-3 |
K2 I have a constant depending on the material of the internal moisture-proof packaging
K2:Constant determined by the hygroscopic material inside the packaging
C1: desiccant moisture absorption rate at the start of use (%)
C2: desiccant moisture absorption rate in the maximum allowable humidity inside packaging (%)
C3: The maximum allowable humidity inside packaging, equilibrium moisture absorption rate of packaging material that is hygroscopic (%)
C4: moisture absorption rate of packaging material that is hygroscopic when placed in packaging (%)
For a completely sealed packing
Item code:
W: The amount of desiccant used (g)
V: volume of the contents was looking through the packaging, the space in the packaging container volume (m3)
H: absolute humidity in the temperature and humidity at the time of packing (g/m3)
C1: desiccant moisture absorption rate at the start of use (%)
C2: desiccant moisture absorption rate in the maximum allowable humidity inside packaging (%)
Technical services of moisture-proof packaging design
1.Calculation of the amount of drying agent by the specified condition
2.Moisture-proof packaging design on rust prevention
3.Various tests (measuring the amount of moisture absorption, the amount of moisture permeability, anti-corrosion test)
4.Other measuring and testing of your choice
