Back to results
US 12,220,898 B2Granted
Thermoplastic roofing membranes adapted for adhesion to polar adhesives
AssigneeHolcim Technology Ltd
InventorsHao Wang, Donna C. Tippmann
Life of this patent
Estimating the term…
Abstract
A method of preparing a thermoplastic roofing membrane, the method comprising (i) extruding a composition including a thermoplastic polymer and a mineral filler to form an extrudate; (ii) forming the extrudate into a sheet having first and second planar surfaces; (iii) allowing the sheet to at least partially cool; and (iv) mechanically treating the first planar surface of the sheet to thereby expose the mineral filler.
Claims11
A method of preparing a thermoplastic roofing membrane, the method comprising:
- (i) extruding a first composition including a thermoplastic polymer and a first mineral filler to form a first extrudate;
- (ii) extruding a second composition including a second thermoplastic polymer and a second mineral filler to form a second extrudate;
- (iii) forming the first and second extrudates into first and second sheets, each having first and second planar surfaces;
- (iv) positioning a reinforcing fabric between the first and second sheets;
- (v) laminating the first sheet to the second sheet to thereby sandwich the reinforcing fabric between the sheets to thereby form a laminate sheet, where the second planar surface of the first sheet and the first planar surface of the second sheet contact the reinforcing fabric;
- (vi) allowing the laminate sheet to at least partially cool;
- and
- (vii) mechanically treating the first planar surface of the first sheet to thereby expose the first mineral filler.
5 more elements
Dependencies are inferred from the claim text.