Color Difference of Cone Dyeing Machine

 

cone dyeing machine

A cone dyeing machine is also called a package dyeing machine, a bobbin yarn dyeing machine or a cheese dyeing machine. When we introduced package dyeing before, we mentioned that there was a major flaw when dyeing with a cone dyeing machine. That is, the color difference between the inside and outside of the cheese is relatively large.

In this article, we will analyze the causes and prevention methods of the color difference between the inner and outer layers of the cheese yarn.

Manifestations of color difference

There are two cases of color difference of cone dyeing.
  • The middle yarn and inner yarn have different shades of color.
  • The different shades of color between inner yarn and outer yarn

Discrimination method

Generally speaking, there are two ways to judge the color difference of the cone dyeing:
  1. Visually assess the degree of color difference between the inner and outer layers.
  2. Use a small knitting machine to knit the yarn into tubular fabric. That is, use inner, middle and outer yarns to knit together into a tubular fabric to see if the fabric has dyeing defects such as cross paths.

​Causes and prevention methods of color difference of cone dyeing machine

Water quality

​The water quality requirements for cone dyeing are:
  • Chlorine content<0.05mg/L.
  • Water hardness <25mg/L.
  • The chromaticityof water <3 degrees.
  • Iron content ≤ 0.1mg/L.

Pump

When dyeing with a cone dyeing machine, the dye liquor needs to penetrate into the inner layer of the cheese by the head of the pump, and achieve a balance through the reciprocating circulation inside and outside. Therefore, the pump must have enough head and flow, and the head and flow of the pump can be adjusted by the dye liquor bypass valve.

Dye

When dyeing polyester-cotton blended yarn and cotton yarn, the choice of dyestuff is the most important factor affecting the color difference between the inside and outside of the cheese. Due to the particularity of cone dyeing, the dyes used are required to have good permeability, excellent migration and dyeing fastness.

The design of dyeing process

The dyeing process of polyester-cotton blended yarn (two-bath method) is:
Grey yarn → pre-shrinking (steaming) → winding → pre-treatment → dyeing and polyester → cleaning (reduction cleaning) → cotton dyeing → post-treatment → drying → yarn rewinding → weaving
Dyeing process of cotton yarn:
Grey yarn → winding → pre-treatment → cotton dyeing → post-treatment → drying → weaving
To learn more, please click here. This content is provided by fyitester.com.


Comments

Post a Comment

Popular posts from this blog

Combing Process in Spinning

Image
Before processing cotton, wool, and silk fibers into fabrics, the process of removing impurities and short fibers in the fibers with a combing machine is called combing. The texture, washability and durability of the fabric produced through this process are greatly improved compared with carded fabrics. The following introduces the composition of the combing machine and the combing process. The kinematic coordination relationship of the main parts on the combing machine is indicated by a dial. The disc is mounted on the combing machine and rotates synchronously with the cylinder, which is generally called the indexing disc. The index plate is divided into 40 equal parts along the circumference, and each equal part is 9°, which becomes one index. The working cycle refers to the time interval between the combing cylinder of the intermittent combing machine corresponding to the two actions of combing the whiskers. That is: the first row of needles in the combing cylinder goes to the botto
Read more

Twist Test Methods and Influencing Factors

Image
  Twist test is an important part of yarn inspection. It is related to the strength, elongation, appearance, style, etc. of yarns and fabrics. Different yarns have different structural characteristics, and their twist testing methods are also different. Basic concept To understand twist testing, you must first understand what twisting is. Twisting is a necessary condition for yarn formation. Short fibers can be made into yarns with certain physical and mechanical properties through twisting; filaments often need to be twisted in order to increase the tightness between single filaments, facilitate processing, and improve fabric properties. Number of twists Twisting is to cause two cross-sections of parallel straight fiber slivers to rotate relative to each other. The number of relative rotations of the two cross-sections is called the number of twists. Twist Twist refers to the number of twists per unit length of yarn . Twist coefficient In actual production, the twist coefficient is of
Read more

Garment Dyeing-Special Dyeing Method In Textile

Image
Garment dyeing is a relatively special dyeing process for textiles and garments. Many people may not know much about this dyeing process. In the impression of most people, textile and clothing products are dyed in the fabric period, and garment dyeing is a dyeing process that breaks people’s cognitive limitations on textile dyeing. ​What is garment dyeing ​Garment dyeing means that dyeing the one not in the fabric type but in the garment type itself. The garment type mentioned above include socks, towels, sportswear, shirts, plush toys (without fillers), T-shirts, pants, bathrobes, handkerchiefs, bath mats, carpets, scarves, etc. The material of these garments can be wool, linen, silk and cotton of natural fibers. But most garments are made of cotton or a cotton-rich blends. Garment dyeing imparts vibrant colors to garments. The clothes such as denim garments, tops, sportswear and casual clothing with garment dyeing can provide a distinctive special effect. Garment dyeing method Garmen
Read more