How to calculate the shrinkage of knitted fabrics, and the formula for calculating knitted fabrics?

How much does the general cloth shrink.

1. It is mainly based on the standard specifications and the suture loss (referred to as the seam head) 2. All are calculated according to the square shape.

3. The total area is multiplied by the gram weight to equal the weight, plus the loss.

4. Loss: a. Cloth edge loss is about = 6cm (two sides) 160cm (width) = 4% (approximately), b. Cutting (defects, cloth head) is about 2%. c. The difference between theory and practice, (width, specification and other factors) is about 10%. Total Losses:

16% (because it is measured, it can be increased or decreased).

For example, the area of the blouse (the following calculations all omit the seam, pay attention to the grip edge, grip the waist, grip the cuff):

Bust x body length x2 sleeve fat x sleeve length x4 (4 layers) Collar rib: collar height x2x long pants: rung x trouser length x4 (or remind to hold the waist, hold the trouser legs) If you give the hips, you should convert the rung size.

Note: The length of the strip to the grid fabric should be increased by one strip width, and the length of the grey fabric with wool and stripes should be increased appropriately.

Conversion in knitted fabrics: length x width = area, area x gram weight g m2 = weight formula 1: yards = meters.

Cloth seal (inches) x = meters.

1000 = Convert grams in gram weight to kilograms.

The essence of Equation 1 is that total length x width x gram weight = kilograms I think is correct.

Formula ?Formula 3: Completely wrong, find the length, should: total weight gram weight = area, area width = length, and then convert into yards. Note, but only in units.

Note: grams square meters, ounces square yards, 1 gram = ounces, 1 gram square meters = ounces square yards, 1 ounce square yards = grams square meters.

In this kind of conversion of the metric system, it is indeed easy to make mistakes, and it is recommended that the units are now unified, and they are all converted to the metric system first, and then calculated. It is easy to make mistakes in the calculation while converting.

will change. First, the shrinkage of the fabric, the fabric is tightened according to the width of the door width when the fabric is set at high temperature in the setting machine, so the fabric is loosened before the garment factory is cut! After loosening, the grammage will increase.

Second, the resurgence, the shaped fabric is extremely dry, and after a period of time, it will be due to water molecules in the air.

When damp, the gram weight will increase! At the same time, it will feel softer!

Knitted fabrics. After soaking in water at a temperature of about 45 degrees or more, it will shrink and be noisy.

All fabrics will shrink, but the shrinkage rate is different, and the shrinkage rate of cotton fabrics and linen fabrics is relatively large.

Washing method. 1.It is not alkali resistant, and neutral detergents should be used, and it is best to use wool special detergents.

2.Soak in cold water for a short time, and the washing temperature does not exceed 40 degrees.

3.Use squeezing and washing, avoid twisting, squeezing and removing water, flattening and drying in the shade or folding and half-hanging in the shade, and do not expose to the sun.

4.Wet plastic surgery or semi-dry plastic surgery can remove wrinkles.

5.Do not use a washing machine for machine washing.

It is recommended to use a front-loading washing machine first.

A light wash setting should be chosen.

The shrinkage rate of general fabrics is:

cotton 4%--10%; chemical fiber 4%--8%; Cotton polyester 3 5%--5 5%；3% for natural white cloth; 3 4% for wool blue cloth; poplin is 3; Flower cloth is 3; Cazavada is 4; 4% for twill; 3-4%; 10% for labor cloth; 10% for rayon.

The shrinkage rate of a fabric refers to the percentage of the fabric that shrinks after washing or immersion in water. The smallest shrinkage rate is synthetic fibers and blended textiles, followed by woolen fabrics, linen fabrics, and cotton fabrics in the middle, while silk fabrics shrink greatly, and the largest are viscose fibers, rayon, and artificial wool fabrics.

The formula for calculating the shrinkage rate of fabrics: shrinkage rate = 1 - fabric length Fabric shrinkage rate length such as a fabric shrinkage of 1%, 100 meters * (m; Shrinkage: It is the fabric itself, provided by the manufacturer.

If you want to calculate, you have to experiment. If you use a 10-meter cloth, go into the water, and then measure, the result is meters, (. The shrinkage ratio is 5%, that is, the ratio of the area of the cotton cloth before and after washing is 100:95.

Hello dear! Shrinkage = 1 - fabric length Fabric shrinkage length. If the length of the fabric is 58cm, the shrinkage rate is 4%, then the length of the fabric shrinkage rate = 58 (1-4%) 58 =.

The raw materials of the fabric are different, and the shrinkage rate is different. Generally speaking, the fiber with large moisture absorption is swelled, the diameter increases, the length is shortened, and the shrinkage rate is large. For example, the water absorption rate of viscose fiber is as high as 13%, and the moisture absorption of synthetic fiber fabric is poor, and its shrinkage rate is small.

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