Meet ng j leaving PI, or suedette, in the textile industry.But in the textile industry, it is customary to call suede or suede suede directly.Suede can be knitted or woven.Knitted suede is also divided into warp suede (more common) and weft suede, shuttle suede and warp suede and weft suede.
Production method editing
The production methods of suede can be divided into three types: machine weaving, knitting and nonwoven.Some companies in the domestic region use the first method.
In the development of synthetic fibre suede velvet products, selection of raw material is super fine fiber filament, ZhiZhi to turn it into a fabric, through special processing, the dyeing and finishing on the surface of the finished fabric to form the uniform of the fine hairs.Ultrafine fiber has the advantage of fluffy, elegant and soft touch. The drape and softness of ultrafine fiber fabric are excellent and the hand feels comfortable.There are many types of super fine fiber, which are suitable for making suede imitation polyester/polyester island and polyester/kumquat flaps.The method of dissolving polyester/polyester island fiber by dissolution is more reliable.
Therefore, the weft direction USES polyester 16.7tex/36fx371(island wire)+7.6tex regular polyester with double twist and l1 in the warp direction.The polyester of 1tex is used as the raw material for the development of suede products.At present, some of the materials used by downstream enterprises in China are dacron island silk purchased from South Korea huis co., LTD., whose single fiber has 37 islands in total. After partial dissolution of the sea, the single fiber is 0.05De.It has the appearance of powder and soft touch and imitation suede.In order to ensure the stability of the quality of the finished fabric, the domestic manufacturers need to ensure that the raw materials are first-class and the same batch number.Soluble fiber formula used is match the raw material of special high temperature caustic soda (150 ℃, the water pH = 13-14) process recipe.
The dyeing process of the suede fabric produced by polyester super fine fiber is much more difficult than that of ordinary polyester fabric.Because of the large surface area of ultrafine fiber, it has remarkable characteristics in dyeing speed, evenness, repeatability and color fastness.Ultrafine fiber has small size, large surface area, fast adsorption of dyes and slow diffusion, so the evenness is poor.The optical reflectance of ultrafine fibers is large, and the amount of dye is more than 30% higher than that of ordinary fibers to achieve the same depth of color.The sun fastness, sublimation fastness and abrasion fastness of ultrafine fiber fabric are all decreased compared with conventional synthetic fiber.Its sublimation fastness is usually reduced by 1-2 steps.
Because polyester super fine suede fabric is relatively light and thin, and considering the product's hand feeling effect, high temperature and high pressure overflow jet dyeing machine is usually used for dyeing production.In addition, such as sea island polyester superfine fibre suede fabric dyeing is much bigger than a normal difficulty of synthetic fiber fabric dyeing, superfine fiber specific surface area is large, the dyeing rate, levelness and reproducibility, color fastness, etc have their distinctive features.That is to say, the specific surface area of ultrafine fiber is large, the adsorption dye is fast, the diffusion speed is slow, the evenness is poor;The reflectance of ultrafine fiber is large, and the color of the same depth of dyeing must be more than 2.5 to 3 percent higher than that of ordinary polyester fiber.The color fastness of ultrafine fiber is worse than that of conventional polyester fiber, and its fastness to sublimation is about 1-2 grades lower.Reducing cleaning helps improve color fastness.
Restore clean edit
In order to improve the color fastness of super fine polyester suede fabric, the fabric must be washed after dyeing.In order to improve the relative fastness of the fabric, the reduction cleaning must be sufficient, and the technical requirements must be standardized and unified, otherwise the final product quality will be affected.3.3 after finishing and processing
Reductive cleaning after the fabric, the dehydration of whole cloth pad and organic silicon softener, under the temperature of 140 ℃ drying setting, in order to ensure product suede style, fabric after setting a slight grinding hair, and then test the packaging warehousing.Therefore, in order to control the color difference effectively, the chemical dosage, temperature, bath ratio, cloth speed and other technological parameters must be strictly controlled in the process of desizing, scouring, opening and dyeing of the fabric.Setting temperature must also be control under 160 ℃.
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