The basic structural parameters of the fabric

First, woven fabric

1. Fineness of warp and weft yarn:

Refers to the thickness of warp and weft yarn. Indicators of the fineness of warp and weft yarns are: imperial count, metric count, special count and denier count.



2. Density M


Fabric density is the number of yarns per warp or weft length in a fabric, expressed as root /10cm or root/inch.


3. Tightness E


Fabric tightness refers to the degree of yarn compaction in the fabric. It is divided into warp tightness and weft tightness. It is expressed by the percentage of the sum of the diameter of the yarn per unit length.


4. Coverage coefficient


The covering factor is the percentage of the yarn's projected area to the fabric area, denoted by R.


 longitude tightness Ew-- latitude tightness


5. Length, width and thickness of the fabric

Length: the length of the horse, in meters.

Width: refers to the maximum lateral size of the fabric, known as width. The units are centimeters.


Thickness: The vertical distance, measured in millimeters, between the front and back sides of a fabric under a certain pressure.


Main factors affecting fabric thickness:

Yarn linear density;


Fabric structure;

Degree of yarn buckling in the fabric;

Tension during production and processing.


6. Weight per unit area


The weight of a fabric is usually expressed in grams per square meter of fabric and is called the weight per square meter. Cotton fabrics are often expressed in terms of desizing dry weight per square meter, while wool fabrics are often expressed in terms of uniform weight per square meter. There are also other expressions, such as the full width of one meter, bar weight, etc.



- warp density PW -- weft density NTT -- warp special number NTW -- weft special number


The above formula does not consider the shrinkage of the weft and moisture regain of the fabric.




source: Shen Dun Sha xian