How to calculated the weight of non-woven fabric (2)
Second, weight and thickness
Since there are length and width, is there a thickness unit? Yes, the gram is used to calculate the thickness, gram, is the square gram weight. But why does g/m^2 not use millimeters? In fact, it is also useful Millimeter, but very less to used, this is an industry rule, in fact, the square gram weight can be equal to the thickness of the millimeter, because the weight of the non-woven fabric is between 10g/m2 ~ 320g / m2.
Third, hardness (feel) / gloss
At present, there are very few equipment test the hardness of non-woven in the market, which are generally measured by hand/gloss.
Fourth, the tensile parameters of the non-woven fabric.
The non-woven fabric has longitudinal and transverse tensile parameters. If it is irregularly drawn and melt-blown, the longitudinal and transverse tensile forces are not much different.
Under gravity, the weight and mass are equivalent, but the units of measurement are different. A weight of 1 kg of material produced by an external force of 9.8 Newton is called 1 kg. The mass unit is usually used instead of the weight, which is implicitly multiplied by the acceleration of gravity. In the old days of China, Jin and two were used as weight units. Pounds, ounces, carats, etc. are also used as weight units.
Commonly used quality units are: micrograms (ug), milligrams (mg), grams (g), kilograms (kg), tons (t), and the like.
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