Twill weave structure
In geometry, points form lines, and lines form surfaces. The same is true for woven fabrics in home textiles. Planar fabrics are interwoven with mutually perpendicular warp and weft yarns. Plain weave, twill weave and satin weave are three different basic interweaving methods.
The so-called twill weave means that the warp and weft yarns are interlaced once every two times, the warp yarns pass through the weft yarns one by one, and the weft yarns pass through the warp yarns one by one at the same time. The interweaving points of adjacent warp yarns are moved one point in turn, and finally the floating lines of the weft yarns of the fabric and the interweaving points are connected to present the effect of diagonal distribution, hence the name of the twill weave.
The plain weave warp and weft yarns have evenly distributed interweaving points, and the front and back look the same. But the twill is different, the front is two up and down, and the back is two up and down, so there is a difference between the front and back of the twill.