The electrostatic problems of textiles, especially chemical fiber products, have been increasingly valued. In order to solve the problem of fabric static electricity, people have adopted antistatic post-organization method, hygroscopic fiber blending method, conductive fiber blending or interwoven method, among which the first two methods are restricted due to durability or environmental conditions, and the use of conductive Fiber blending methods are becoming more and more widely used. Among conductive fibers, organic composite conductive fibers are more widely used because of their similar properties to other fibers, such as easy to blend or interwoven, and easy to dye.
Organic composite conductive fibers can be blended or interwoven with almost all kinds of fibers, but during textile processing, appropriate conductive fibers should be selected according to the type of blended fibers, processing process, end-use, etc. At the same time, appropriate processes should be selected during dyeing and finishing processing to enable the conductive fiber to perform better results.
1. Pretreatment of fabrics containing organic conductive fibers
A variety of organic conductive fibers have different cross-sections due to the different matrix (PA6, PA66, PET, etc.), and the different conductive substances (carbon black, metal compounds, etc.) and the different cross-sections of various organic conductive fibers due to the different matrix (PA6, PA66, PET, etc.), and the different cross-sections of conductive substances (carbon black, metal compounds, etc.) in the same way as the different cross-sections of various organic conductive fibers. Different shapes (skin core type, eccentric circle, center circle, thin sheet sandwich, etc.) also have different performances for dyeing and finishing processing.
The pretreatment has different processing techniques according to the blended fabric. For wool fabrics or polyester fabrics, they are mainly affected by moisture heat, acid, reducing agent, etc., to remove impurities, wash, shrink, bleach, etc.; for polyester cotton or cotton fabrics, they are mainly affected by moisture heat, alkali, oxidizing agent, etc., Desizing, removing miscellaneous materials, cooking, bleaching, etc.; for polyester filament imitation wool or imitation silk fabrics, they are mainly affected by damp heat and alkali, and are used to desizing, remove oil, reduce amount, etc.; for polyester brocade composite fabrics, It is mainly affected by damp heat, alkali, etc., and is used to desizing, oil removal agent, fiber opening, etc. Therefore, organic conductive fibers will withstand different chemical effects in these fabrics. Fortunately, most organic conductive fibers have a certain tolerance for chemical treatments such as moisture heat, acid, alkali, oxidation and reduction. However, some severe conditions such as strong acids or strong alkalis can affect the performance of the conductive fiber matrix and thus affect its use.
Nylon 6 is more sensitive to alkalis. Due to degradation in thermal alkalis, the strong decrease is large, but as the alkali concentration increases, the strong change does not occur much within a certain period of time. This is different from the reduction of polyester. As the alkali concentration increases, the reduction rate increases, peeling occurs and the fiber becomes thinner, thereby reducing the strength. Therefore, when the actual production of polyester filament fabrics, if a large reduction is required, the use of conductive fibers with nylon 6 as the substrate should be avoided as much as possible, and surface coating should also be avoided when selecting conductive fibers with polyester or nylon 66 as the substrate. Carbon leather core type. For wool or wool fabrics, nylon is used as the base conductive fibers, because nylon is more acid-resistant than polyester and is easy to dye. Usually, heat treatment has little effect on the conductivity of organic conductive fibers mixed with fabrics.
2. Dyeing of fabrics containing organic conductive fibers
Because organic conductive fibers are usually used in fabrics and are used in small amounts, soGenerally, special attention is not required when dyeing. However, for some dark fabrics, when light-colored conductive wire is mixed with, the conductive wire should be dyed.
For polyester-based conductive fibers, they can be dyed with dispersed dyes, which is very convenient to apply in wool-polyester-blend, polyester-cotton blend and pure polyester-wool fabrics. For nylon-based conductive fibers, acid dyes, neutral dyes, reactive dyes and dispersed dyes can be used. When fastness requirements are high, neutral dyes should be used as much as possible. Therefore, nylon-based conductive fibers are used for pure hair Fabrics, wool-polyester fabrics, nylon fabrics and polyester-breast composite fabrics all have the characteristics of easy dyeing; when used in polyester or polyester-cotton blended fabrics, dispersed dyes should be selected, otherwise some dispersed dyes will not be dyed with nylon or dyed lightly. At this time, the method of supplementing the color of acidic or neutral dyes can also be used.
3. Post-tissue of fabrics containing organic conductive fibers
Generally speaking, post-tissue of fabrics containing organic conductive fibers is carried out according to the end use of the entire fabric, and no special treatment is required, especially for organic conductive short fibers. This is especially true for blended fabrics. Some fabrics need soft finish, and softeners can be used; some need anti-wrinkle finish, and anti-wrinkle finish; some need moisture absorption and comfortable finish, and anti-static agent can be used; some may need to be combined to meet various requirements. For example, the imitation wool filament military port should be soft and anti-wrinkle, as well as anti-fouling and moisture absorption.
When organic conductive filaments are used in pure polyester-based chemical fiber fabrics, due to the embeddedness of conductive fibers, most of the static electricity generated by friction of the fabric can be corona discharged or leaked, and there will be no active ash absorption phenomenon. However, when there is a lot of air dust, the dust particles sinking on the surface of the fabric will be concentrated around the conductive fibers due to the discharge around the conductive fibers, forming gray strips. The solution to this problem is to use a high-hygroscopic finishing agent to treat the fabric, reduce the specific resistance of the entire surface of the fabric, enhance the static leakage capacity of the entire surface of the fabric, and at the same time achieve moisture absorption, comfort, anti-fouling and easy decontamination effects.
Extended reading: https://www. alltextile.cn/product/product-99-902.html
Extended reading: https ://www.alltextile.cn/product/product-33-542.html
Extended reading: https://www.alltextile.cn/product/product-27-969.html
Extended reading: https://www.china-fire-retardant.com/post/9376.html
Extended reading: a href=”https://www.china-fire-retardant.com/post/9568.html” >https://www.china-fire-retardant.com/post/9568.html
Extended reading: https://www.alltextile.cn/product/product-72-673.html
