Analysis of Common Defects in Textile Fabrics

1. Jingliu

Phenomenon: In the warp direction of the fabric, the entire warp yarn appears to shine or darken regularly or irregularly, with one or more shadow stripes.

Cause: Shading caused by differences in color absorption during fabric dyeing due to factors such as warp material or tension.

Solution: Maintain consistency in tension during the processing.

2, Trachoma

Phenomenon: Spots on the surface of printed fabrics caused by mesh blockage.

Cause: The sticky substances in the printing paste stick to the printing plate, blocking the passage of the printing paste.

Solution: Choose high-quality printing paste.

3. Colorless creases

Phenomenon: During the printing process, due to the crease of the fabric, there is a clear vertical stripe without coloring on the printed fabric.

Cause: During printing, the fabric surface is wrinkled and the covered area is not printed with patterns.

Solution: Add anti wrinkle agent in the bath during the pre-treatment process to reduce the occurrence of wrinkles. In the setting process, a setting machine can be added to keep the fabric flat and in a fixed shape.

4. Line Printing

Phenomenon: During the printing process, due to the incomplete treatment of residual yarn on the surface of the fabric, there is a linear colorless streak on the surface of the printed fabric.

Cause: Residual yarn on the surface of the fabric due to factors such as static electricity.

Solution: Add anti-static agents during the shaping process to reduce the adsorption of yarn on the fabric caused by static electricity.

5. Infiltration

Phenomenon: The color paste in the printed fabric disperses the pattern outline.

Cause: Insufficient viscosity of printing paste, overlapping of two color printing paste.

Solution: Select the appropriate paste and adjust the appropriate viscosity

6. Dead creases

Phenomenon: Due to poor dyeing and finishing or voltage treatment, local folding damage to the fabric surface is caused, which cannot be eliminated after ironing and presents obvious creases.

Cause: Creases have been generated during the pre-treatment process and were not completely eliminated during shaping; During dyeing and finishing, the fabric expansion device failed to open the creases on the fabric

Solution: Add anti wrinkle agent in the bath to the pre-treatment while ensuring the normal operation of the processing device.

7. Oil Pollution

Phenomenon: Gray or finished fabrics have various forms of oil stains.

Cause: Lubricants are contaminated during weaving, dyeing, finishing, or transportation.

Solution: Choose a suitable degreaser to remove any oil stains.

8. Water Stains

Phenomenon: The fabric surface has traces of natural air drying after being soaked in water.

Cause: Immersion by water.

Solution: Acid washing can be used to remove water stains.

9. Rust

Phenomenon: The marks left by rust on the fabric.

Cause: The fabric is stored in a humid environment and comes into contact with metal.

Solution: Clean the rust with a rust remover.

10. Mouldy spots

Phenomenon: Gray black mold spots appear on the fabric surface

Cause: High humidity in the storage environment leads to bacterial growth.

Solution: Clean thoroughly with a mold remover.

11. Scratches

Phenomenon: Irregular and abnormal scratch marks appear on the printed and dyed fabric under fluorescent light, which is different from the normal color effect of the fabric surface.

Cause: During the dyeing process, it is superior to abnormal friction between the internal machinery of the dyeing cylinder and the fabric surface, or being scalded by high temperature during the drying process.

Solution: Add fiber protectant to the dyeing vat, and remove the oil thoroughly during the pre-treatment process to prevent burns.

12. Color Flower

Phenomenon: There are irregular patches of color on the fabric surface.

Causes: Incomplete desizing and refining of pre-treatment or temperature changes during cylinder dyeing, resulting in uneven coloring or excessive dyeing speed.

Solution: Select appropriate refining agents for incomplete pre-treatment; For fast dyeing speed, choose a suitable leveling agent.

13. Color Stains

Phenomenon: There are color dots on the surface of the fabric that are different from the overall color.

Causes: Poor dissolution of dyes, incomplete cleaning of floating colors, contamination, poor thermal stability of dyes, resulting in secondary condensation of dyes after dyeing.

Solution: First, choose a suitable dye, and then use oxidants or reducing agents to remove color spots.

14. Loss of ammunition

Phenomenon: Wrinkles appear on the surface of high elastic fabrics due to local loss of elasticity.

Cause: Due to the erosion of local elastic fibers during the storage of grey fabric, dyeing and finishing at high temperatures lose elasticity, resulting in local loss of elasticity on the fabric surface and wrinkling marks.

Solution: Choose a suitable degreaser to remove oil stains from the fabric and prevent fabric damage caused by local temperature rise.

15, Claw marks

Phenomenon: The surface of the fabric shows claw shaped marks.

Cause: The weight of fabric dyeing is too large, and the cooling rate is too fast after dyeing.

Solution: Reasonably arrange the production process and quantity.