Dryer fabric having an abrasion resistant edge
AssigneeWangner Systems Corporation
InventorsRichard W. Smith, Scott Quigley
Life of this patent
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Abstract
A dryer fabric for use with drying drums in a dryer section of a paper forming machine wherein a plurality of transversely extending filament yarns interconnect a plurality of transversely extending filament yarns to form the dryer fabric as a continuous loop. The dryer fabric is formed with a plurality of silicone strips along its edge portions to prevent wear due to abrasion and heat, the silicone rubber encapsulates end portions and edge ones of the yarns forming beads along the outer surfaces of the dryer fabric which separate the yarns from direct contact with the drums. The dryer fabric is capable of operating at temperatures of between 350.degree. to 500.degree. F. in a paper forming machine without accelerated degradation.
Claims18
A dryer fabric for use with at least one heated drying drum in a paper making machine said dryer fabric being formed of continuous filament yarns to have a support surface and a running surface including:
- a pair of unfinished edges extending along the length of said dryer fabric;
- a paper supporting area extending over a major portion of said support surface between said edges and along the length of said dryer fabric;
- abrasion and hydrolysis resistant areas extending along the length of said dryer fabric adjacent outer edges of said supporting area and respective of said opposed edges;
- abrasion and hydrolysis resisting material covering portions of said abrasion and hydrolysis resistant areas of said running surface forming drum contact areas above said support surface said abrasion and hydrolysis resisting material comprising a fast curving silicone sealant impregnated into the interstices of said drying fabric and bonded about said edge forming filaments;
- whereby in use,
- said dryer fabric is maintained separated from said drying drum in said paper supporting area by paper carried on said paper supporting area and in said abrasion and hydrolysis resisting areas by said silicone sealant.
The dryer fabric 1 wherein said silicone sealant is arranged as a plurality of interrupted strips extending along the length of said fabric.
A dryer fabric capable of operating with drying drums heated to temperatures of between 320.degree. and 350.degree. F. in a dryer section of a papermaking machine;
- wherein,
- a plurality of longitudinally extending filament yarns are interconnected with a plurality of transversely extending filament yarns to form said dryer fabric as a continuous loop having a support surface and a running surface;
- said support surface including a paper supporting area arranged between opposed edge portions, said supporting area being adapted to carry and press paper into contact with said drying drums;
- said dryer fabric having a plurality of continuous abrasion resistant and hydrolysis resistant strips formed along said opposed edge portions adjacent said supporting surface, said strips comprising a U.V. silicone sealant adhered along each said edge portion, said strips of U.V. silicone sealant forming a coating comprising continuous and uniform beads along said support surface and said running surface which extend through interstices of said dryer fabric to unite edge ones of said longitudinally extending yarns with end portions of said transversely extending yarns to seal said edge portions, said beads extending along a plane above the plane of said support surface, said beads function to protect said edge yarns from deterioration due to friction and hydrolysis by maintaining said edge portions separated from contact with said dryer drums during drying.
Dependencies are inferred from the claim text.