Single Cable Twisting Machine

single cable twisting machine

Basic Info

Product Description

DT2008Single spindle machine

The product uses MITUSBISHI inverter control,automatic twist conversion,CNC forming and 1kg-15kg roll with out knots.It can be appliedin the combination and twisting for both single and multiple strands,and it’s also a new generation machine for twisting filament and industrial yarn.It can be used in various areas such as weaving industry yarn,embroidery yarn and silk ribbon industry yarn.

yarn making machine pre-sale Services

1. Sport expedition and Professional feasibility proposal;

2. Equipment configuration, Model Reference and Equipment technical advice.

3. For customers invest, Matching, Material selection, Development personnel and Training full-service.

yarn making machine after-sales Service

1. Regular maintenance and product tracking service;

2. Cost price for required parts in life;

3. Provide high quality and fastest efficient after service.

The relationship between the structure and application properties of acid dyes

The molecular structure of dyes is closely related to the application properties of dyes in fibers, such as light resistance, moisture resistance (washing, soaping), shrinkage resistance, levelness and dye uptake. Therefore, some rules between the molecular structure and application properties of dyes have been paid attention to by dye workers.

Although the dyeing properties of acid dyes and the fastness of dyes to fibers are related to the types and properties of dyed fibers, the most important factor is the structure of dye molecules themselves.

1、 The relationship between dye molecular structure and light resistance

The light fastness of dyes on fibers is related to many factors, such as the type, properties, light source characteristics, temperature, humidity, dyeing depth and molecular structure of dyes.

In the molecular structure of dyes, the parent structure, the properties of substituents and their relative positions have a direct impact on their light fastness. Generally, the presence of amino and hydroxyl groups in the material molecules is not conducive to the improvement of light fastness, while halogen (- C1, Br gate, nitro, sulfonic, cyano and trifluoromethyl groups are conducive to the improvement of light fastness. When the amino group is acylated to acylamino group, the alkalescence (or electronegativity) of the amino group is reduced, and the light fastness of the dye on the fiber is improved. Amino acylation in the molecule can improve the light fastness of acid dyes on wool, but when the fatty chain is too long, the light fastness will be reduced. For example, the light fastness of the acid dyes obtained by the coupling of a R salt with the diazonium salt of the aniline substituted derivative is the highest among the dyes with substituents in the vicinity of the Ti whisker group,

X in the above structure can be one Oh, OCH3, - SO3H and one C1, etc.

Another effective way to improve the light fastness of acid dyes is to introduce some special groups into the dye molecules to improve the stability of the dye molecular structure, or to affect the physical state of the dye molecules in the dyed fibers, so as to improve the light fastness. Typical substituent groups are different sulfonyl amino groups, such as so2nr2, nhso2ph, so2nhch3, etc., which can be introduced into acid dyes and metal complex dyes.

In practical application, aliphatic carbon chain is introduced into acid dyes, which not only improves the light fastness of dyes, but also improves the wet treatment performance. The results show that with the increase of the length of the introduced fatty carbon chain, the light fastness increases, usually C4 ~ C3 is better, and if longer fatty chain such as C16 is introduced, the light fastness decreases.

The influence of the length of aliphatic carbon chain in the molecule on the light fastness of dyed fabric can be considered to be related to the physical state of dye molecules in the fiber. Dyes with medium length carbon chain are easy to form aggregation state or micelles, which can easily eliminate or decompose the energy of dye excited state before photochemical decomposition of dye molecules, or reduce the existence time of dye molecules in excited state, or reduce the area attacked by reaction particles such as O2, free radical, H2O2, so as to improve the light fastness of dye. The longer aliphatic carbon chain can increase the surface activity of these dye molecules, reduce the stability of dye aggregate, and make the dye exist as a single molecule in the fiber. Therefore, it is necessary to select the appropriate length of fat chain according to the application requirements.