Three-layer blown film experiments show that peel strength to EVOH or nylon correlates with a parameter called the process time, which is defined as the time it takes the molten polymer to reach the frostline once it has exited the die. Process time is used as a tool to probe how productivity (haul-off speed), melt temperature and storage environment influence peel strength performance. All three parameters are thought to impact peel strength by affecting the tensile properties and residual stress of the film.
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