The tarpaulin factory introduces two types of tarpaulins

Tarpaulins are usually divided into two categories: coarse tarpaulins and fine tarpaulins. Coarse tarpaulin, also known as tarpaulin, is a fabric that is strong and resistant to folding and has good waterproof performance. The warp and weft yarns of fine tarpaulin are used in the production of labor protection clothing and its supplies. After dyeing, it can also be used as shoes, travel bags, backpacks and other fabrics. In addition, there are rubber tarpaulins, shielding tarpaulins for fire and radiation protection, and tarpaulins for paper machines. 1. Yarn count: In short, yarn count refers to the thickness of the yarn.“Imperial”That is: when a pound (454 grams) of cotton yarn (or other component yarn) is 840 yards (0.9144 yards/meter) in length, the fineness of the yarn is one. If a pound of yarn, its length is 10×840 yards, its fineness is 10, and the representation method of yarn count is the English alphabet.“S” The representation method of single yarn is: 32 single yarns-------represented as: 32S strands are expressed as: 32 strands (two twisted together) are: 32S/2, 42 3 The root and twist are: 42S/3. 2. Density: The calculation unit of tarpaulin fabric density is in metric system, which refers to the number of warp and weft yarns arranged within 10cm. The size of the density directly affects the physical and mechanical indicators such as the appearance, feel, thickness, strength, folding resistance, air permeability, abrasion resistance and thermal insulation performance of the fabric, and it is also related to the cost and production efficiency of the product. (1) Indirect test method This method is suitable for fabrics with high density and small number of yarns with regular organization. First, after analyzing the fabric structure and the number of weave loops (the number of weft loops), and then multiplying the number of weave loops in 10cm, the product obtained is the warp (weft) yarn density. (2) Direct measurement method The direct measurement method is completed by means of a cloth mirror or a fabric density analysis mirror. The length of the scale of the fabric density analysis mirror is 5cm. Under the analysis lens, a long glass piece is engraved with a red line. When analyzing the fabric density, move the lens and align the red line on the glass piece and the red line on the scale at the same time. Between the yarns, take this as the starting point, and count the yarns while moving the lens until the 5cm scale line is this. The number of output yarns is multiplied by 2, which is the density value of 10cm fabric. When counting the number of yarns, take the center between the two yarns as the starting point. If the count reaches the end, it exceeds 0.5, and when it is less than one, it should be counted as 0.75. If it is less than 0.5, then 0.25 root count. Generally, 3-4 data should be measured for fabric density, and then the arithmetic mean value should be taken as the measurement result. 3. Gram weight: Gram weight: refers to the weight in grams of one square meter of fabric. For woven tarpaulin fabrics“ounce”“install”or“OZ”Knitted tarpaulin generally uses gram weight (g/m2). Its conversion is that 1 ounce is equal to 28.375 grams, but it is generally 28.35 grams on a weighing machine, which is related to yarn count and fabric warp and weft density. The thicker the yarn, the thicker the cloth. The greater the gram weight.

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