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Tg Service-Window Screen
Calculate the distance between one reported Tg and a buyer-entered service-temperature window. Use one unit throughout; the arithmetic is a question generator, not a service-temperature rating or grade recommendation.
Temperature inputs
Arithmetic result
Lower-end minus Tg
—Upper-end minus Tg
—Screening note
Enter all three temperatures to calculate the margins.
Required follow-up
A window that crosses or sits above Tg does not automatically fail a material, and a window below Tg does not automatically approve it. Ask for grade-specific melt behavior, modulus or creep evidence where relevant, and test the actual bonded joint under the intended load and exposure.
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