| Test |
Scope of Test |
| OPTICS |
|
| Haze |
Measurement of the amount of forward light scattered through a piece of film |
| Gloss @ 45º |
The reflectance properties of film when hit by a light source at an angle of 45º |
| Opacity |
This procedure determines how impervious a sample is to the passage of light |
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| HEAT SEAL |
|
| Seal Initiation |
The temperature at which the flexible film begins to seal to itself |
| Seal Curve |
The measurement of seal strengths of flexible films from initiation to destruct |
| Hot Tack |
The strength of heat-seals immediately after the sealing operation |
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| SURFACE |
|
| Treat |
Measurement the films wetting tension |
| COF |
Frictional properties of a film or sheeting specimen when slid over itself or another surface |
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| IMPACT |
|
| Dart Drop |
Strength measurement of a film’s ability to withstand the shock of a falling dart without breaking |
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| PERMEATION |
|
| MVTR |
Transmission rate of water vapor through barrier materials |
| OTR |
Transmission rate of oxygen gas through barrier materials |
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|
| PHYSICAL |
|
| Elmendorf Tear |
Measurement of film’s ability to resist tearing under specific conditions |
| Tensile |
A measurement of the strength of a film and the ability to withstand stretching |
| Secant Modulus |
An index of stiffness of plastic sheeting and film |
| Shrinkage |
Measurement of percent of film shrinkage under a controlled temperature & time interval |
| Thickness Profile |
Measurement of film thickness |
Microscopic Layer Distribution Analysis |
Measurement of the % each layer represents in the total structure |