Method of drying coating film formed on pet film surface and coating film drying furnace
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United States of America Patent
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Nov 17, 2015
Grant Date -
Aug 29, 2013
app pub date -
Apr 4, 2013
filing date -
Jan 23, 2012
priority date (Note) -
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Abstract
A method of drying a coating film formed on a surface of a PET film includes radiating an infrared ray having a dominant wavelength of 3.5 μm or less from an infrared heater onto a PET film on whose surface the coating film containing water or an organic solvent having an absorption spectrum of 3.5 μm or less has been formed, where the infrared heater has a structure such that an outer circumference of a filament is covered with a protection tube, and a partition wall for forming a flow passageway of a cooling fluid that restrains rise in temperature of a heater surface is provided in a space surrounding this protection tube, and bringing cooling air into contact with the surface of the PET film/coating film has been formed, so as to dry the PET film at a temperature lower than a glass transition point of the PET film.
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