Technical professionals in the industry will definitely use sutures when formulating technical standards and conducting related product tests. Hongsheng Pattern Machine Computerized Sewing Machine In order to enable the majority of technicians to truly understand the basic knowledge of stitching for pattern computerized sewing machine accessories and to select and purchase stitches in a targeted manner, this article discusses some basic concepts and calculation formulas of computerized pattern machine stitching , unit conversion and understanding and other related content summary.

Sewing thread - Sewing thread is a kind of spun yarn or spun yarn twisted thread, usually surface-coated and lubricated, used to sew one or two materials.

Green thread - Green thread is the semi-finished sewing thread formed after final twisting or a similar step in processing such as extrusion, synthetic fiber deformation, weaving, etc.

Line density - Line density is the line mass per unit length. The specific value of linear density can be obtained by dividing the fiber or yarn mass by its length.

Yarn count - Yarn count is a unit that expresses yarn sophistication or specifications. Depending on the yarn calculation system, the expression is "quality/length" or "length/quality".

Indirect yarn calculation system - The indirect yarn calculation system is used to express the relationship between yarn length and yarn quality, and specifies yarn specifications through unit mass yarn length or unit length yarn mass (yarn density) system.

Metric count (Nm) - an indirect calculation system for yarn, indicating the number of meters of the length of a 1-gram yarn under a common moisture regain (referring to the percentage of moisture contained in cotton and the weight of dry fibers). That is, 1 gram of yarn is exactly 1 meter long and is 1 (male) count yarn. Metric count is a fixed weight system, so the larger the count, the thinner the yarn. For example: the length of 1 gram weight yarn is 200 meters long and the yarn fineness is 200 counts. It is widely used in cotton and wool textile industries.

Imperial count (Ne) - an indirect calculation system for yarn, indicating that under the public moisture regain, the length of 1 pound of yarn is a multiple of 840 yards, that is, 1 pound of yarn is exactly 840 yards long, which is 1 (English) count. Yarn (quantity of 840 yard length yarn per pound). The imperial count is a fixed weight system, so the larger the count, the thinner the yarn. Example: The length of 1-pound yarn is 21×840 yards long, and the fineness of the yarn is 21 counts, written as 21s. The British count is also called cotton yarn count in the cotton textile industry. It is not the legal yarn unit in my country today, but it is still widely used in the cotton textile industry.

Tex (tex) - referred to as "tex", also known as "number", indicates the weight in grams of a 1000-meter-long yarn under the public moisture regain rate, and indicates the linear density value. It is a fixed-length unit. The smaller the number, the finer the thread (the lower the number of fibers); the larger the number, the rougher the thread (the greater the number of fibers). It is often used for wool yarn.

Denier (Nden) - Denier (denier), also known as "denier", is the earliest imperial unit for electric sewing machine thread. Indicates the number of grams of 9,000-meter-long yarn or fiber under the public moisture regain rate, and represents the linear density value. It is a fixed-length unit. The larger the weight, the thicker the yarn or fiber. It is often used for chemical fiber filaments, silk, etc.

From the above concept, it can be seen that due to the irregular shape of the fiber filaments or yarns and the hairiness (protruding short fiber hairs) on the surface of the yarn, the fineness of the yarn cannot be expressed by diameter, and the above indicators can be used to express the fineness of the yarn. Number or density indicates yarn fineness.

Calculation formula

1. Tex (tex) = (G/L) × 1000 where: G is the weight of the yarn (grams), L is the length of the yarn (meters).

2. Denier (Nden) = (G/L) × 9000 where: G is the weight of the silk (grams), L is the length of the silk (meters)

3. Metric count (Nm) = L/G In the formula: L is the length of the yarn (silk) (meters), G is the weight of the yarn (silk) (grams).

4. British count (Ne) = (L/G) × 840 where: L is the length (yards) of the yarn (silk), G is the weight (pounds) of the yarn (silk)

Conversion relationship

Nm=9000/Nden;tex=1000/Nm.

tex=Nden/9 (1 denier=0.11 tex).

Ne=C/tex (C is a constant, chemical fiber is 590.5, cotton fiber is 583, if it is a blended yarn, it can be calculated based on the mixing ratio).

Conceptual understanding

1. The count can represent the "quality/length" or "length/quality" of the yarn.

2. The number and denier only indicate the density (mass/length) of the yarn.

3.tex and Nm are metric units; S (imperial count) and D (denier) are imperial units.

4.tex represents the weight of each share in grams per 1000m length, which can also be understood as weight (g)/length l (m), with a coefficient of 1000.

5.D represents the weight ×× grams per share on a length of 9000m, which can be understood as weight (g)/length l (m), and the coefficient is 9000.

6. The count is inversely proportional to the number, that is, the higher the count, the lower the tex value, that is, the smaller the number of grams of wire on the 1000m length, for example: 60S=9.8tex, and 10S=59.1tex (the premise must be homogeneous Within the same length range, generally production enterprises take 3000m).

7. Denier is proportional to the number, that is, the greater the D value, the greater the tex value. For example: 120D=13.2tex; and 60D=6.7tex.

8.60S or 10S both refer to the density of a single strand. The higher the count, the smaller the diameter and the thinner.

9. Commonly used unit relationships: 1 meter = 1.0936 yards; 1 yard = 0.9144 meters; 1 kilogram = 2.2046 pounds; 1 pound = 0.4536 kilograms; 1 meter = 39.37 inches; 1 inch = 0.0254 meters; 1 tube (imperial system) = 840 yards ; 1 branch (metric system) = 1000 meters; 1 public branch = 1.69 British branch; 1 British branch = 0.583 public branch.