Tests for Physical Properties of Plastics - Test Items Peculiar to Films -

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Tear test

Related standards: JIS K7128-1, K7128-2, K7128-3

Trouser tear test
Average strength of a slit specimen as determined when it was torn by the use of a tensile testing machine
Elmendorf tear test
Strength as determined by holding a fan-shaped specimen in the clamp, cutting a 20-mm slit into it and releasing the pendulum to tear it
Right angle tear
Maximum strength as determined when a specimen having a right angle section in the center was torn by the use of a tensile testing machine

Pinhole resistance test

Related standards ASTM F392

Summary
After a specimen set in cylindrical form is subjected to repeated torsional bending at a specified temperature, rate and number of times, the specimen is checked for the existence/nonexistence or number of pinholes by the use of a pinhole detector.

Specimen set in cylindrical form Specimen subjected to torsional bending

Pinhole detector
The number of pinholes is counted by sliding a specimen with a specified voltage applied to the top and bottom electrodes.

Tests on other items of physical properties

Tensile test, impact tests (tart impact, film impact), piercing test, peeling test, heat-sealability test, hot tack test, friction coefficient test, blocking test, gas permeability test, water vapor permeability test, heat shrinkage test, heat shrinkage stress test, flex resistance test, wet tension test

Search Number 6M001

Download The Technical Note of This Exapmle.

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