Seal Strength Testing
The efficacy of heat seals is often detailed in governing specifications, contracts, and regulations. Quality management systems sometimes ask for periodic subjective evaluations: For example, some seals can be evaluated by a simple pull to determine the existence of a bond and the mechanism of failure. With some plastic films, observation can be enhanced by using polarized light which highlights the birefringence of the heat seal. Some seals for sensitive products require thorough verification and validation protocols that use quantitative testing. Test methods might include:
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Famous quotes containing the words seal, strength and/or testing:
“Eyes, look your last.
Arms, take your last embrace, and lips, O you
The doors of breath, seal with a righteous kiss
A dateless bargain to engrossing death.”
—William Shakespeare (1564–1616)
“The storm is over, the land hushes to rest:
The tyrannous wind, its strength fordone,
Is fallen back in the west”
—Robert Bridges (1844–1930)
“Is this testing whether I’m a replicant or a lesbian, Mr. Deckard?”
—David Webb Peoples, U.S. screenwriter, and Ridley Scott. Rachel, Blade Runner, being tested to determine if she is human or machine (1982)