Rooftop canvas

Abstract

Rooftop canvas includes a twill texture layer having a plurality of flat warp strips extending in a longitudinal direction and a plurality of flat weft strips extending in a lateral direction perpendicular to the longitudinal direction. An imaginary line passing through an intersection of one of the flat weft strips and one of the flat warp strips and an intersection of another flat weft strip adjacent to the flat weft strip and another flat warp strip adjacent to the flat warp strip is inclined relative to the longitudinal direction and the lateral direction. The twill texture layer is superimposed on a first covering layer. The rooftop canvas can further include a second covering layer, with the first covering layer sandwiched between the twill texture layer and the second covering layer.

1 . Rooftop canvas comprising:
 a twill texture layer including a plurality of flat warp strips extending in a longitudinal direction and a plurality of flat weft strips extending in a lateral direction perpendicular to the longitudinal direction, with an imaginary line passing through an intersection of one of the plurality of flat weft strips and one of the plurality of flat warp strips and an intersection of another of the plurality of flat weft strips adjacent to the one of the plurality of flat weft strips and another of the plurality of flat warp strips adjacent to the one of plurality of flat warp strips being inclined relative to the longitudinal direction and the lateral direction; and   a first covering layer, with the twill texture layer superimposed on the first covering layer.   
     
     
         2 . The rooftop canvas as claimed in  claim 1 , with each of the plurality of flat warp strips and the plurality of flat weft strips including at least one corrugated face, with the twill texture layer including at least one corrugated surface. 
     
     
         3 . The rooftop canvas as claimed in  claim 1 , further comprising: a second covering layer, with the first covering layer sandwiched between the twill texture layer and the second covering layer. 
     
     
         4 . The rooftop canvas as claimed in  claim 1 , wherein each of the plurality of flat warp strips and the plurality of flat weft strips is made of polyolefin. 
     
     
         5 . The rooftop canvas as claimed in  claim 1 , wherein the first covering layer is made of polyolefin. 
     
     
         6 . The rooftop canvas as claimed in  claim 3 , with the second covering layer is made of one of a thermoplastic elastomer, a polyolefin elastomer, or a polyolefin plastomer, or a mixture of polypropylene and at least one of a thermoplastic elastomer, a polyolefin elastomer, and a polyolefin plastomer. 
     
     
         7 . The rooftop canvas as claimed in  claim 4 , wherein the polyolefin is polypropylene. 
     
     
         8 . The rooftop canvas as claimed in  claim 5 , wherein the polyolefin is polypropylene.