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Product name: LLY-07D Fabric Flame Retardant Technical description of small 45 flame retardant tester, flame retardant performance tester instrument: Uses: Used for rating the flammability of clothing textiles Structural principle: Place the sample at an angle of 45, ignite the sample for 1s, and burn the sample with flame ... [ Product Details ] Product name: LLY-07B Fabric Flame Retardant Technical description of the instrument: Uses: It is mainly used to determine the burning rate of textiles in the horizontal direction under specified conditions. Structural principle: Place a certain size sample horizontally on a specified burner, ignite according to a specified time, and measure ... [ Product Details ] Product name: LLY-07A Fabric Flame Retardant Technical description of the instrument: Uses: Used to determine the flame retardancy of textiles in the vertical direction. Structural principle: Place a certain size sample vertically on a prescribed burner to ignite, and measure the afterburning of the sample after ignition at the prescribed time ... [ Product Details ] Product name: LLY-07C Fabric Flame Retardant Technical description of the instrument: Uses: Used to test the burning performance of fabrics. The measurement of the damage area of the textile in the 45 direction, the number of flame exposures and the burning performance of the carpet when it is melted to a specified length in the 45 state. Structural principle: will be ... [ Product Details ]
How to use fabric warp and weft density mirror
Fabric density refers to the number of yarns of the fabric per unit area. Warp density is called warp density, and weft density is called weft density.
China's current fabric density is expressed in two ways: metric and imperial.
Metric refers to the number of yarns within 10 cm of the fabric. Inch is the number of yarns within 1 inch of the fabric.
The two are convertible, measured as 1 inch = 2.54 cm.
According to the definition above, the density mirror is generally designed as a square magnifying glass in inches or centimeters.
For example, the density of 30 pieces of 78 * 65 above you means that there are 78 warp yarns and 65 weft yarns in 1 square inch of the fabric. Written as warp density: 78 roots / inch; Weft density: 65 roots / inch; when combined, it is 78 * 65.
Seeing whether a fabric is metric or imperial is actually very simple: according to the unity of unity, the front is imperial count (such as 30s above), and the following expression must be inch. If the front is metric or metric count The following expression must also be centimeters.
Knowing the above principles, it is a very simple matter to choose which density mirror to use for measurement.