Determining the warp and weft of the fabric After determining the front and back of the fabric, it is necessary to determine which direction in the fabric is the warp and which direction is the weft, which is an important factor in the analysis of the density of the fabric, the number of warp and weft yarns, and the weave of the fabric prerequisites. The main difference between the latitude and longitude of the fabric is as follows.
1. If the sample of the fabric being analyzed is selvedge, the yarn parallel to the selvedge is the warp and the weft perpendicular to the selvage.
2. Containing pulp is warp, pulp is not containing the weft.
3. The general fabric density of one side is warp yarn, one side of the low density weft yarn.
4. Reed marks obvious fabric, then the reed marks the direction of fabric warp.
5. One of several yarns in a fabric is a strand while the other group is a single strand, then the strands are usually warp yarns and the single yarns are weft yarns.
6. If a single yarn fabric into the different twist when the yarn, the Z twist yarn warp, S twist yarn to the weft.
7. If the twist of the fabric into yarn is different, then the majority of large twist for the warp, small twist for the weft.
8. If the fabric of the special number of warp and weft, twisting, twisting are not very different, the yarn is dry even, shiny better for the warp
9. Towel fabrics, the yarn from the pile of warp, can not afford the pile of yarn for the weft.
10. Sliver fabric sliver direction is usually warp.
11. If the fabric has a system of yarn with a variety of different special number, this direction is the warp.
12. Leno fabric, twisted yarn as warp, non-twisted yarn for weft.
13. Interwoven in different raw materials, the general cotton wool cotton interwoven fabrics, cotton for the warp; wool interwoven fabric, silk as warp; wool cotton interwoven fabric, the silk, cotton as warp; natural silk and silk Interwoven, natural silk warp; natural silk and rayon interwoven fabric, the natural silk warp. Due to the wide range of uses of the fabric. Thus the requirements of raw materials and organizational structure of the fabric is also varied, so in the judgment, but also to determine the specific circumstances of the fabric.
(Addtime：2018-1-2)
