pvc tarpaulin cover sheet with eyelet The calculation unit of density 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. So how to measure the density of tarpaulin? Let's take a look with the editor of the tarpaulin factory!
(one)
tarpaulin indirect test method
This method is suitable for fabrics with high density and regular weave 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 weave loop), and then multiply it by the number of weave loops in 10cm, and the product obtained is the warp (weft) yarn density.
(two)
waterproof pvc coated tarpaulin for truck side 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, the center between the two yarns should be used 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 counted 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.
