Nouns For Testing Cotton

< p > span Span Length: according to the principle of photoelectric conversion, the length of the camera is measured, that is to say, the specimen of the fibrous plexus is randomly grabbed from the comb, and the length distribution curve is measured. The number of fibers from the comb at 3.8 mm is 100%, the length of the fiber on the graph is 2.5%, the length is 2.5% span length, and the length of the fiber is 50%, the length is 50% span length.

< /p >

< p > uniformity (Uniformity): the ratio of 50% to 2.5% span length is usually based on < a href= "http://www.91se91.com/news/index_c.asp > International calibration cotton sample < /a >.

< /p >

< p > maturity (Maturity): refers to the degree of thickening of fibrous cell walls, that is, the degree of deposition of cellulose in cotton fiber cells.

The maturity of the fiber is expressed as the percentage of maturity. The maturity coefficient is determined by the comparison between the width of the cavity and the thickness of the cell wall.

< /p >

< p > Single Fiber Strength: the maximum breaking load of a single fiber during tensile fracture is also known as breaking strength, cN per unit.

< /p >

< p > Fiber Strength: the breaking load of fiber unit cross-sectional area or unit linear density.

According to the test method, test standard and chuck and gauge, the index is also different.

For example, the zero gauge, the 3.2 mm gauge strength, the Stelo gauge (3.2 mm) spacing fracture strength ratio, the HVl900 Fiber Tester (3.2 mm) spacing (ICC level) fracture strength.

The unit is expressed by GF tex-1 or cN. Tex-1.

< a href= "http://www.91se91.com/news/index_s.asp" > Chinese cotton mill < /a > also used the fracture length index of the Soviet Union, the unit is km.

< /p >

< p > fineness (Fineness): refers to the degree of fiber thickness, that is, fiber diameter.

The indicators include metric count (Nm), Tex (Tex) or number, micronan value, fiber diameter, density, cross section and so on.

< /p >

< p > micron number (Micronaire): a comprehensive index of the fineness and maturity of cotton fiber, and a measure of the permeability of a certain amount of fiber under specified conditions.

The micron values were divided into three grades: A, B and C.

The optimum range of Grade A for fine cotton is 3.7 ~ 4.2; the B grade is the standard grade, 3.5 ~ 3.6 or 4.3 ~ 4.9; the other is the poor range, which is C grade.

< /p >

< p > < < a href= "http://www.91se91.com/news/index_q.asp >" cotton standard for testing instruments (Draft) "< /a > definition of cotton nouns > /p >

< p > Cotton Color Grade: the level of reflectance of cotton samples (Rd) and yellow depth (+b) measured on the location of cotton color characteristics.

< /p >

< p > reflectance (Reflectanee): indicates the degree of shade of cotton samples.

< /p >

< p > yellow depth (Hunter, s+b): indicating the depth of the yellow tone of cotton.

< /p >

< p > the average length of the upper part (Upper half mean length): the average length of fiber in the fiber length distribution.

< /p >

< p > average length (Mean fibre length): the average length of fiber length distribution in terms of weight.

< /p >

< p > length uniformity index (Length Unfiormity): the length uniformity index is the ratio of the average length to the average length of the upper part, expressed in percentage.

< /p >

< p > breaking ratio strength (Fibre Strength): the fracture strength is the strength shown when the bundle fiber is stretched to fracture, and it is expressed by the force per unit line density of the unstrain specimen, the unit is cN. Tex-1.

Note: this standard adopts chuck gauge 3.2 mm and HVICC level.

< /p >

< p > micron number (Micronaire): a measure of the permeability of a certain amount of cotton fiber under specified conditions.

The micron scale is based on a set of "internationally calibrated Cotton Standards" which have been determined by international agreements to determine their micron values.

< /p >

< p > impurity area (Trash area): the percentage of the area covered by impurity particles in the test area is the percentage of the total area tested.

< /p >

< p > the amount of impurities (Trash count): the total number of impurities on the sample surface in the test area.

< /p >

< p > NEP (Neps): the node formed by entanglement of cotton fibers.

< /p >