| http://www.w3.org/ns/prov#value | - Although the temperature for the heat sealing is variable with various factors such as the magnitude of pressure applied, the duration of pressure application, and the thickness and kind of the film used, it is generally selected in the range of 80??? to 180??? C., preferably 120??? to 150??? C. The material of the heat seal layer is desired to assume a completely molten state or at least a half-m
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