Abstract

A puncture-resistant, electrically-energized sheet heater comprises a conductive polymeric film laminated between a top puncture-resistant, polymeric protective layer and a bottom backing layer that may comprise an insulated backing layer of extruded polystyrene closed-cell foam board. The heater is appointed to be placed beneath, or embedded in, a pavement material, and energized to provide heat to remove frozen precipitation from the pavement, or prevent it from accumulating thereon.

IPC Classes  ?

• H05B 3/36 - Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs heating conductor embedded in insulating material
• B32B 3/08 - Layered products essentially comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products essentially having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
• B32B 7/02 - Physical, chemical or physicochemical properties
• B32B 27/00 - Layered products essentially comprising synthetic resin
• E01C 11/26 - Permanently-installed heating or blowing devices
• E01H 5/10 - Removing snow or ice from roads or like surfaces; Grading or roughening snow or ice by application of heat
• E04D 13/00 - Special arrangements or devices in connection with roof coverings; Roof drainage
• F24D 13/02 - Electric heating systems solely using resistance heating, e.g. underfloor heating

Abstract

A photosensitive element for use as a flexographic printing plate comprises a support, an elastomeric photopolymerizable layer having a surface opposite the support that defines a plane, and a matted layer disposed above the surface of the photopolymerizable layer comprising a polymeric binder and at least one matting agent which is capable of forming depressions from the plane into the photopolymerizable layer. Also described is a process for preparing such a photosensitive element and a process for preparing a flexographic printing plate from the photosensitive element.

IPC Classes  ?

• G03F 7/11 - Photosensitive materials - characterised by structural details, e.g. supports, auxiliary layers having cover layers or intermediate layers, e.g. subbing layers
• B41N 1/00 - Printing plates or foils; Materials therefor
• G03C 5/00 - Photographic processes or agents therefor; Regeneration of such processing agents
• G03F 7/09 - Photosensitive materials - characterised by structural details, e.g. supports, auxiliary layers