Dyeing loss refers to the loss of fabric during dyeing and finishing. In the process of dyeing and finishing, the dyeing loss of chemical fiber is small, while the dyeing loss of natural fabric is large.

Main factors of fabric dyeing and finishing loss;

1. In bleaching and dyeing, oil, wax, pectin and cottonseed hull are removed from fabrics, yarns and fibers.

2. Fracture and shedding of free fibers on fabrics and yarns in dyeing and finishing, including accumulation and shearing in finishing.

3. The fabric is corroded and dissolved after various treatments such as acid reduction, alkali reduction, enzyme treatment and chemical washing.

4. Shear loss in fabric processing: removing seams, making cylinder samples, etc.

5. Loss due to fabric quality problems: it can't be repaired, but the repeated loss can be repaired 2, 3.4.

6. The moisture regain of grey cloth is greater than that of finished products.

7. Dyes and auxiliaries are adsorbed on the fabric.

Personal summary:

1, cotton loss of knitted fabric: bleached 7- 10%, light 7-9%, medium dark 6-9%.

2. Loss of polyester-cotton knitted fabric: 7-9% bleaching, 6-8% light color and 5-8% medium dark color.

3. Loss of polyester knitted fabric: 4-6%. (If the loss is large, it means that the raw oil may exceed the standard. )

4. Loose fabrics are more easily damaged than tight fabrics.

5. The dyeing loss of roving fabric is greater than that of spinning fabric.

Writing a paper? It should help you. . You must be classmates. . .

also

Some fabrics are beautiful, which were secretly cut by workers. In fact, this is also very common.

This also counts.