Canvas is thick cotton or linen fabric. Named for the original use of sails. Generally, plain weave is used, a small amount of twill weave is used, and warp and weft yarns are multi-stranded. Canvas is usually divided into two categories: coarse canvas and fine canvas.
The coarse canvas, also known as the tarpaulin, is usually woven from No. 58 (10 lbs) 4 to 7 strands. The fabric is strong and resistant to folding and has good waterproof performance. It is used for covering cars and open warehouses and tents in the wild.
Fine canvas warp and weft yarns are generally 2 strands 58 to 6 strands 28 (10 inches / 2 to 21 inches / 6), used to make labor protection clothing and supplies. It can also be used as a fabric for shoes, travel bags, backpacks, etc. after dying. In addition, there are rubber canvas, shield canvas for fire and radiation protection, and canvas for paper machine.