Triline Ab

E.i. Dupont De Nemours and Company

Maria Strid

Lars Karlsson

Jaan K&auml;rem

H&aring;kan Arv&eacute;rus

Peter Gottschling

Zbigniew Stachyra

This invention relates to a powder coating composition comprising a mixture of conventional, possibly coloured, non-conductive thermosetting powder coating compositions with highly conductive thermosetting powder coating compositions so as to produce a coating having an electrical surface resistance of less than 10 &OHgr; (ohm), preferably of less than 10 &OHgr; (ohm), and to the substrates coated therewith. This invention also relates to using a mixture of non-conductive and conductive powder coating compositions to produce a coated surface having an electrical surface resistance sufficiently low to possess antistatic properties.

Antistatic powder coating compositions and their use

Plant for powder coating the surfaces of objects with polymeric powder having a melting and softening temperature below 100&deg; C. The polymeric powder includes a polymer curable under the influence of electromagnetic radiation. Objects to be coated are prepared to retain powder charged with static electricity. The objects are then sprayed with powder charged with static electricity and thereafter heated to a surface temperature of about 100&deg; C. thereby melting the powder retained on the surface by exposure to infrared radiation and heated air. The objects are radiated by electromagnetic radiation for curing of the powder over the surface of the objects.

Method and apparatus for powder coating

Method and plant for powder coating the surfaces of objects with polymeric powder having a melting and softening temperature near 100&deg; C., said polymeric powder includes a polymer curable under the influence of electromagnetic radiation, the method including a first step in which the objects to be coated are prepared to retain powder charged with static electricity; a second step in which the objects are sprayed with powder charged with static electricity; a third step in which the objects are heated to a surface temperature of about 100&deg; C. thereby melting the powder retained on the surfaces by being expose the objects to infrared radiation and heated air; a fourth step in which the objects are radiated by electromagnetic radiation for initiating of curing of the powder melted to reflow over the surfaces of the objects, the objects simultaneous with the radiation being cooled.

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Västervik, Sweden

Maria Strid