The measurement method of foreign fiber can only detect the colored foreign fiber in the yarn, but the foreign fiber composed of polypropylene fiber is usually white or has no color, so it can hardly be identified by the foreign fiber detection principle, because its color is no different from that of cotton. Therefore, we have developed a new measurement principle to detect this foreign fiber. Polypropylene filament (PP) is mainly a hard ribbon fiber, which usually protrudes from the yarn body. Polypropylene fiber is used as the packing material of cotton package, so it is the source of pollution.
Because they can only be detected after dyeing or finishing, they can only be found in finished woven or knitted fabrics because they are not found by the traditional foreign fiber detection method.
We all know that the unit used to express parameters of polypropylene yarn is Daniel number. Daniel number means that the weight of 9000 meters long yarn is 1 gram (g), so we generally say that it is 1 dan, and it is represented by the letter D. For example, for example, the specification of this yarn is 75D, which can be interpreted as a yarn of 9000 meters, and its weight is 75g, that is, 75 deniers.
Yarns of different specifications can be produced according to customers' needs. In addition to the length of the yarn, customers also require the softness and bulk of the yarn, which requires the letter "F". First, yarn is divided into warp and weft, which are all composed of several yarns. F represents the combination of a weft and warp yarn. Generally speaking, the larger the "F" index is, the looser and softer the yarn is!
The warp and weft mentioned in the previous paragraph extend to the number of yarns and the longitude and latitude, that is, the yarn density. It means the total number of yarns and weft yarns per square inch of inner diameter. The letter "T" is generally used. When counting the number of yarn lines, pay close attention to the knitting method of yarn, so as to find out the knitting rule, which is helpful to better count the number of yarn lines
The specifications of fine denier polypropylene yarn include: 30D/24F, 30D/36F, 30D/48F, 50D/48F, 50D/72F, 75D/36F, 75D/48F, 75D/72F, 100D/96F, 100D/72F, 150D/72F, 150D/96F, 150D/136F150D/144F
