A thicker cotton or linen fabric. Named because it was originally used for sails. Generally, plain weave is used, and a small amount of twill weave is used. Multi-strand yarns are used for warp and weft yarns.
Tarpaulin is usually divided into two categories: coarse tarpaulin and fine tarpaulin.
Coarse tarpaulin is also called tarpaulin. The fabric is strong and resistant to folding and has good waterproof performance. It is used for automobile transportation and open-air warehouse cover and tents in the field.
Fine tarpaulin warp and weft yarns are used to make, labor protection clothing and its supplies. After dyeing, it can also be used as fabrics for shoes, travel bags, backpacks, etc. In addition, there are rubber tarpaulins, shielding tarpaulins for fire and radiation protection, and tarpaulins for paper machines.
1. Yarn count:
To put it simply, yarn count refers to the thickness of the yarn. At present, the "English system" is commonly used in China, that is: one pound (454 grams) of cotton yarn (or other component yarn), and the length is
At 840 yards (0.9144 yards/m), the fineness of the yarn is one piece. If a pound of yarn has a length of 10×840 yards and a fineness of 10 yarn counts, the representation method of the yarn count is the English letter "S". The representation method of a single yarn is:
32 single yarns ------- expressed as: 32S strands are expressed as: 32 strands (two twists in parallel) is: 32S/2, 42 strands and 3 twists are both: 42S/ 3.
The calculation unit of the density of tarpaulin fabric is in metric system, which refers to the number of warp and weft yarns arranged within 10cm. The density directly affects the appearance, feel, thickness, strength, flexural resistance, air permeability, abrasion resistance and thermal performance of the fabric and other physical and mechanical indicators. At the same time, it is also related to the cost and production efficiency of the product.
This method is suitable for fabrics with high density and regular weaves with small yarn characteristics. First, after analyzing the fabric weave and the number of weaves circulating warp yarns
(The number of weft yarns in the organization cycle), and then multiply it by the number of weave yarns in 10cm, and the product is the warp (weft) yarn density.
Direct measurement method
The direct measurement method is accomplished 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. Below the analysis lens, a long strip of glass is engraved with a red line. When analyzing the fabric density, move the lens to align the red line on the glass and the red line on the scale at the same time. Between the yarns, use this as the starting point, and count the yarns while moving the lens until the 5cm scale line is the same. The number of output yarns multiplied by 2 is the density value of the 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 should be more than 0.5, and if it is less than one, it should be calculated as 0.75.
If it is less than 0.5, it will be counted as 0.25. Generally, 3-4 data should be measured for fabric density, and then take the arithmetic average value as the measurement result.
Weight:Refers to the weight of a square meter of cloth in grams.
Woven tarpaulin fabrics use "ounce", "an" 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 on the weighing machine.
28.35 grams is related to the yarn count and the warp and weft density of the fabric. The thicker the yarn, the thicker the cloth and the greater the weight.
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Post time: Sep-09-2021