초록 ▼

This invention provides a process and an apparatus for baking an organic coating which has been applied to a substrate. Such coated substrates are conventionally baked in a furnace using a mixture of combustion gas and air. This process in uneconomical in terms of energy consumption and also involve

This invention provides a process and an apparatus for baking an organic coating which has been applied to a substrate. Such coated substrates are conventionally baked in a furnace using a mixture of combustion gas and air. This process in uneconomical in terms of energy consumption and also involves cleansing of used gases before they can be discharged into the atmosphere. The present invention provides a rapid process for baking such coatings in an inert gas atmosphere by means of short-wavelength infra-red rays. Coatings are heated in such a penetrating manner than they are baked at the substrate/coating interface and this prevents the formation of swellings.

대표청구항 ▼

A process for treating an organic coating of paint, ink or varnish applied to a substrate consisting of polymers dispersed in a solvent, said process comprising the steps of: radiating in a heating furnace said organic coating with short-wavelength infra-red rays in an inert gas atmosphere without a

A process for treating an organic coating of paint, ink or varnish applied to a substrate consisting of polymers dispersed in a solvent, said process comprising the steps of: radiating in a heating furnace said organic coating with short-wavelength infra-red rays in an inert gas atmosphere without acting chemically on the polymers contained therein to evaporatively remove the organic solvent from the coating, and condensing the removed organic solvent such that air is prevented from being introduced into the heating furnace to prevent explosions by air/solvent mixture, and to increase the evaporation content of the atmosphere of the heating furnace to thereby increase the rate of solvent removal from the coating, and reduce the cost of subsequent solvent condensation.