RAPID CURING OF ADHESIVES ON A SUBSTRATE
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United States of America Patent
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Jun 18, 2020
app pub date -
Dec 15, 2018
filing date -
Dec 15, 2018
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Abstract
A method and a lamination system including patterned coat rollers and a rapid curing chamber containing a serpentine draped roller system for rapidly curing a low viscosity, hot melt adhesive (LVHMA) coated on a substrate, for example, a foam sheet or a fabric material layer, are provided. A uniform dispersion of the LVHMA is applied on at least one surface of the substrate, where the patterned coat rollers create an imprinted pattern on the substrate for increasing absorption of the LVHMA into the substrate and preventing creeping of the LVHMA out of the substrate when the substrate is conveyed at a preset speed through the rapid curing chamber. The rapid curing chamber is set and maintained at a preset temperature and a preset humidity level based on the speed of conveyance of the coated substrate to rapidly cure the conveyed substrate in about 4 minutes to about 6 minutes.
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