Water Vapor Transmission of Laminate Film for CS Packages

1
Water Vapor Transmission of Laminate Film for CS
Packages

• Uno M. Nagoya Univ.

2
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 isnt covered with Al.
• ?So we have to check.

3
Set Up

• Size 12.510cm2 (opera emulsion)
• Contents
• sample cotton woolwater (2g)
• reference cotton
• 20 packages for each type
• Storage environment 40C
• (Yamato Program Incubator IN61)
• watching the change of weight of these packages.

4
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.

s 0.0014g
5
Weight of Packages
10mg
6
Weight of Packages and Humidity
7
Weight of Packages and Humidity
20?45

• Weight of packages depend on humidity.
• In fact, PET is generally absorbent (0.1-2.5).

8
Value of sample reference
Requirement lt0.1g/5years/1pack
? lt0.0011g/day/20packs

• Laminate film is good for CS packages !