Asphalt coated mat
AssigneeJohn R. Fields
InventorJohn R. Fields
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Abstract
Method and apparatus for production of asphalt coated sheets comprising materials highly prone to distortion under heat, including polyester and similarly deformable materials, in a coating machine comprising a mat puller adapted to pull the mat at a selectable rate, a coater, and a metering device. The metering device is optionally adapted to pull the mat at a selectable rate. The mat is pulled through the coater and coated with asphalt heated to 250° F. to 500° F., while the rates at which the mat puller and metering device pull the mat are independently and/or jointly adjusted to such that coated sheet may be produced at rates of more than 200 feet per minute, without wrinkling or necking in the mat.
Claims8
A sheet comprising:
- a single layer of nonwoven or woven polyester mat coated with a modified asphaltic material, said modified asphaltic material comprising a mixture of roofing grade asphalts having a softening point of between about 50 degrees F. and about 225 degrees F. with penetration at 77 degrees F. of about 12 to about 100 {fraction (1/10)} millimeters combined with from 1% to 25% by weight styrene ethylene styrene (SEBS) copolymer and from 1 to 50% by weigh of a mineral fiber.
An asphalt coated sheet suitable for use in roofing, sealing, paving, waterproofing membranes and other related technologies, the sheet comprising a single layer of continuous filament mat having a thickness of from about 0.5 to about 1.5 millimeters and a fabric weight of about 50 to about 1000 grams per square meter, a shrinkage at 200° C. of at least 0.2% and a relative elongation at 180° C. and under an 8 daN load of at least 5%, the mat coated on at least one side with asphalt.
Dependencies are inferred from the claim text.