How to distinguish the types of tarpaulins

In our life, a large number of waterproof tarpaulins are used, and there are many waterproof tarpaulins used in transportation. Let me introduce the waterproof tarpaulin to you in detail. What is a waterproof tarpaulin? Waterproof tarpaulin (or waterproof tarpaulin) Cloth) is a high-strength, waterproof material with excellent resistance and softness, often used as canvas (tarpaulin), polyester with polyurethane coating or manufactured into polyethylene-type plastics. Tarpaulins generally have sturdy grommets at the corners or edges to facilitate tying, hanging or covering with ropes. Waterproof tarpaulins are generally divided into two categories: coarse tarpaulins and fine tarpaulins. Coarse waterproof tarpaulin, also known as tarpaulin, the fabric is strong and resistant to folding, with excellent waterproof function, used for car transportation and concealment of open warehouses and tents in the field. 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. Waterproof tarpaulin yarn count: In short, the waterproof tarpaulin yarn count refers to the thickness of the yarn, which is commonly used in my country or the British standard & that is: a pound (454 grams) of cotton yarn (or other component yarns) with a length of At 840 yards (0.9144 yards/meter), the fineness of the yarn is one. If a pound of yarn has a length of 10×840 yards, its fineness is 10, the indication method of the yarn count is the English letter S & the indication method of the single yarn is: 32 single yarn ------- Indicated as: 32S strands The method is shown as follows: 32 strands (two strands twisted together) are: 32S/2, and 42 strands of 3 strands are twisted together: 42S/3. Waterproof tarpaulin density: The calculation unit of the waterproof tarpaulin fabric density is in metric system, which refers to the number of warp and weft yarns placed within 10cm. The size of the density directly affects the physical and mechanical indicators such as the appearance, feel, thickness, folding resistance, air permeability, wear 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 for waterproof tarpaulins This method is suitable for waterproof tarpaulins with high density and fabrics with small yarn characteristics. First, by analyzing the fabric arrangement and the number of cyclic warp yarns (arranged cyclic weft yarns), and then multiplying the number of 10cm arranging cycles, the resulting product is the warp (weft) yarn density. (2) The direct measurement method of waterproof tarpaulin 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 analyzer is 5cm. A tarpaulin is placed under the analyzer lens, and 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 with the red line on the scale at the same time. Between a certain two yarns, use 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 middle between the two yarns as the starting point. If the count reaches the end, it exceeds 0.5, and if there is a lack of one, it should be counted as 0.75. If there is a lack of 0.5, press 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) The weight of waterproof tarpaulin: refers to the weight in grams of one square meter of waterproof tarpaulin. Woven tarpaulin fabrics use ounces & Ann & or OZ & knitted tarpaulins generally use gram weight (g/m2). The warp and weft density is related. The thicker the yarn, the thicker the cloth and the greater the waterproof tarpaulin.

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