Process for forming multilayer coating

Claim 2

A process for forming a multilayer coating film comprising the steps of: (a) atomizing a first coating composition in an atomizing room; (b) forced draft conveying the atomized first coating composition from said atomizing room through an elongate transport passage to a supply nozzle such that large diameter particles of the first coating composition impact against and adhere to wall surfaces of the passage; (c) establishing a high voltage electrical potential across an outlet of the nozzle to electrostatically charge the atomized first coating composition exiting the nozzle; (d) impacting the electrostatically charged atomized first coating composition against a surface of a moving web such that the coating composition adheres to the web and forms a first coating film layer thereon; (e) partially drying the first coating film layer so that a viscosity of the first coating film layer is 100 cp or more; (f) repeating steps (a) through (d) for a second coating composition to form a second coating film layer on an upper surface of said first coating film layer; and (g) running said first and second coating film layers, formed on said moving web, through a final drying zone to fully dry said multilayer coating film.

Claim 3

A process for forming a multilayer coating film, as recited in claim 1, wherein said first and second coating film layers are force draft conveyed through separate, consecutive transport passages.

Claim 4

A process for forming a multilayer coating film, as recited in claim 2, wherein said moving web passes through a partial drying zone, between said separate, consecutive transport passages, for partially drying said first layer.

Claim 5

A process for forming a multilayer coating film, as recited in claim 1, wherein said web carried a sheet-like body to be coated and wherein said multilayer coating film is formed on an upper surface of said sheet-like body carried by said web.

Claim 6

A process for forming a multilayer coating film, as recited in claim 1, wherein the mean diameter of the atomized coating composition particles is less than or equal to about 50 μm.

Claim 7

A process for forming a multilayer coating film, as recited in claim 1, wherein the viscosity of the atomized coating composition ranges from between about 5 cP and about 100 cP.

Claim 8

A process for forming a multilayer coating film, as recited in claim 4, wherein said process is used to produce a photosensitive printing plate precursor comprising a plurality of layers of a photosensitive coating component formed on said sheet-like body.

Claim 9

A process for forming a multilayer elating film comprising the steps of: (a) atomizing a first coating composition in an atomizing room; (b) forced draft conveying the atomized first coating composition from said atomizing room through an elongate transport passage to a supply nozzle such that large diameter particles of the first coating composition impact against and adhere to wall surfaces of the passage; (c) establishing a high voltage electrical potential across an outlet of the nozzle to electrostatically charge the atomized first coating composition existing the nozzle; (d) impacting the electrostatically charged atomized first coating composition against a surface of a moving web such that the coating composition adheres to the web and forms a first coating film layer thereon; (e) partially drying the first coating film layer so that a viscosity of the first coating film layer is 100 cp or more; (f) repeating steps (a) and (e) for a second coating composition to form a second coating film layer on an upper surface of said first coating film layer; (g) repeating steps (a) through (d) for a third coating composition to form a third coating film layer on an upper surface of said second coating film layer; and (h) running said first, second and third coating film layers, formed on said moving web, through a final drying zone to fully dry said multilayer coating film.

Claim 10

A process for forming a multilayer elating film comprising the steps of: (a) atomizing a first coating composition in an atomizing room; (b) forced draft conveying the atomized first coating composition from said atomizing room through an elongate transport passage to a supply nozzle such that large diameter particles of the first coating composition impact against and adhere to wall surfaces of the passage; (c) establishing a high voltage electrical potential across an outlet of the nozzle to electrostatically charge the atomized first coating composition existing the nozzle; (d) impacting the electrostatically charged atomized first coating composition against a surface of a moving web such that the coating composition adheres to the web and forms a first coating film layer thereon; (e) partially drying the first coating film layer so that a viscosity of the first coating film layer is 100 cp or more; (f) repeating steps (a) and (e) for a second coating composition to form a second coating film layer on an upper surface of said first coating film layer; (g) repeating steps (a) through (d) for a third coating composition to form a third coating film layer on an upper surface of said second coating film layer; and (h) running said first, second and third coating film layers, formed on said moving web, through a final drying zone to fully dry said multilayer coating film.

Claim 11

A process for forming a multilayer coating film, as recited in claim 8, wherein at least one coating film layer is a charge generating layer comprising a charge generating agent and at least one coating film layer is a charge transporting layer comprising a charge transporting agent.