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Automatic knitting machine——Several methods of anti-pilling finishing

Views: 4     Author: Site Editor     Publish Time: 2022-06-09      Origin: Site

Automatic knitting machine There are many methods of anti-pilling finishing. The methods before and during dyeing include changing the structure, composition, and properties of fibers, changing the spinning process and fabric structure of the yarn, changing the dyeing and finishing process, etc., but we are generally used to After dyeing and dyeing of cloth and garments, the methods are as follows:


1. Bio polishing (bio-enzymatic finishing)


Bio polishing is a finishing process in which cellulase is used to improve the surface of cotton fabrics to achieve a lasting anti-pilling effect and increase the finish and softness of the fabric. Bio-polishing removes the delicate fibers that protrude from the surface of the yarn, and the fluff on the fabric's surface can be significantly reduced, making it smooth without pilling.


The practice has proved that this method has a lasting effect on reducing pilling because the ends of the fibers are removed instead of being covered in place. Still, it should be noted that this method will cause an inevitable loss of fabric strength and partial weight loss.


This method requires strict control of the process conditions. Otherwise, it will cause enzyme inactivation or severe damage. It is not suitable for large-scale fabrics to use this method, so some knitted fabric dyeing and finishing factories are reluctant to use it.


2. Mild milling method


After the knitted fabrics such as woolen sweaters are lightly milled, the roots of the wool fibers will be felted in the yarn, and the fibers will be entangled with each other, thus enhancing the friction coefficient between the fibers so that the fibers are subject to friction. It is not easy to slip out of the yarn, reducing the pilling phenomenon of fabrics such as sweaters. Light milling can improve the anti-pilling effect for worsted woolen sweaters and other fabrics.


3. Resin finishing method


Principle: Resin is a variety of polymers. Using the function of the resin to form a film on the surface of the fiber, the surface of the fiber is wrapped with a layer of the wear-resistant resin film. This resin film can weaken the fiber slip; it Refers to the uniform cross-linking and condensing on the surface of the yarn, which can make the fiber end adhere to the yarn, and it is not easy to pilling when rubbed, so it can effectively improve the anti-pilling of the sweater.


Choice of resin


The selected resin must have a large adhesive force with the fiber, and at the same time, it should have a particular strength. After finishing, it must have good elasticity and a smooth and non-sticky feel. The adhesive film does not affect the color of the dye. Fastness and gloss. No irritation to human skin. No peculiar smell; tree finger has stable performance, convenient and reliable application, and low price.


Currently, the available resin (acrylic resin self-crosslinking type tree finger) can no longer meet the high requirements of customers for fabrics because some anti-pilling agents (resins) are present, and the hand feel becomes hard after treatment, and the strength decreases. The processed color light Changes occur, and some resins must be baked at high temperatures. It has been phased out abroad, and a new generation of anti-pilling agents has been gradually developed. Its main representative products are polyurethane-based polymers and organic silicone resins and have been widely used in the production of anti-pilling finishing for knitwear.


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