LeMan Polymer Technology Co., Ltd(LeMan) has a high-quality and enterprising professional R&D team. Our company aims to provide market-competitive fabric waterproofing products and provide the best textile waterproofing solutions, and has established a good technical support and sales tracking service system. Mainly engaged in three-proof finishing agents, its product system includes carbon eight waterproofing agent, carbon six waterproofing agent, ecological fluorine-free waterproofing agent,solvent-based waterproofing agent, special material waterproofing, etc.
Here we will give you a detailed explanation of fabric finishing technology. Finishing is to give fabrics color effects, shape effects (Smooth, suede, crisp, etc.) and practical effects (water-proof, non-felting, non-ironing, non-wormy, and flame-resistant). etc.) technical processing methods. Fabric finishing is a process that improves the appearance and feel of fabrics, enhances wearing performance or gives special functions through chemical or physical methods. It is the “icing on the cake” processing process of textiles. Post-finishing methods can be divided into two categories: physical/mechanical finishing and chemical finishing. According to the purpose of post-finishing and the effects produced, it can be divided into basic finishing, appearance finishing and functional finishing.
The purpose of finishing
1.Make the textile width neat and uniform, and the size and shape stable. Such as setting (stretching) width, mechanical or chemical anti-shrinkage, anti-wrinkle and heat setting, etc.
2.Improving the appearance of textiles: including improving the gloss and whiteness of textiles, and enhancing or weakening the fluff on the surface of textiles. Such as whitening, calendering, electro-optical, subtext, sanding, shearing and shrinking, etc.
3.Improving the feel of textiles: Chemical or mechanical methods are mainly used to give textiles a comprehensive touch feeling such as softness, smoothness, plumpness, stiffness, thinness or thickness. Such as softness, stiffness, weight gain, etc.
4.Improve the durability of textiles: Chemical methods are mainly used to prevent damage or erosion of fibers by sunlight, atmosphere or microorganisms, and extend the service life of textiles. Such as moth-proofing, mildew-proof finishing, etc.
5.Giving textiles special properties: including giving textiles some protective properties or other special functions. Such as flame retardant, antibacterial, water repellent, oil repellent, UV protection and antistatic, etc.
The development of fabric finishing technology is developing in the direction of product functionality, differentiation, high-end, and diversification and in-depth processing technology, with an emphasis on improving the wearing performance of the product and increasing the added value of the product.
In recent years, various new technologies (such as low-temperature plasma processing, bioengineering, ultrasonic technology, electron beam radiation processing, inkjet printing technology, microcapsule technology, nanotechnology, etc.) have been continuously introduced and borrowed from other technical fields to improve processing Depth to get good finishing products.As humans pay more and more attention to environmental pollution and damage, they pay more and more attention to health, and advocate a “low-carbon” economy. Post-finishing technology requires environmentally friendly “green” processing to produce “clean” and “low-carbon” textile products.
The basic finishing methods of fabrics include: finishing methods to stabilize size and improve appearance, finishing methods to improve hand feel and optimize performance, finishing methods to make fabrics multi-functional and high added value, finishing methods to make fabrics advanced, and finishing methods to meet special requirements. Organizing methods.
Various post-finishing processes are as follows:
Pre-shrinking is a process that uses physical methods to reduce the shrinkage of fabrics after being soaked in water to reduce shrinkage. Mechanical preshrinking means that the fabric is first wetted by steam or spray, and then mechanically squeezed in the warp direction to increase the buckling wave height, and then dried by loosening.
Tentering is a process that utilizes the plasticity of cellulose, silk, wool and other fibers under humid conditions to gradually widen the width of the fabric to a specified size and then dry it to stabilize the shape of the fabric. It is also called finishing.
Sizing refers to the finishing process in which fabrics are dipped in slurry and dried to achieve a thick and stiff feel.
Heat setting is a process that makes the shape of thermoplastic fibers and blends or interweaves relatively stable. It is mainly used for the processing of synthetic fibers such as nylon or polyester and their blends that are prone to shrink and deform after being heated. Heat-set fabrics can improve dimensional stability and have a stiffer feel.
Whitening is a process that uses the complementary color principle of light to increase the whiteness of textiles, also known as whitening. There are two whitening methods: bluing and fluorescent whitening.
Calendering, electro-optical and embossing, calendering is a process that uses the plasticity of fibers under hot and humid conditions to flatten the surface of the fabric or roll out parallel fine twills to enhance the luster of the fabric. Flat calendering is a hard rolling point composed of a hard roller and a soft roller. After the fabric is rolled, the yarn is flattened, the surface is smooth, the gloss is enhanced, and the feel is stiff. Soft calendering is a soft calendering point composed of two soft rollers. After the fabric is calendered, the yarn is slightly flat, with a soft luster and a soft feel. Electro-optical calendering uses electrically heated rollers to calender the fabric. The embossing is composed of a steel roller and a soft roller engraved with a positive pattern. Under hot rolling conditions, the fabric can obtain a lustrous pattern.
Sanding is the process of using a sanding roller (or belt) to grind out a short and dense layer of velvet on the surface of the fabric is called sanding, also known as sanding. Sanding finishing can make the warp and weft yarns produce velvet at the same time. And the hair is short and dense.
Fluffing is the process of using dense needles or thorns to pick up the fibers on the surface of a fabric, forming a layer of fluff, also known as velvet finishing. Fluffing is mainly used for woolen fabrics, acrylic fabrics, and cotton fabrics. The down layer can improve the warmth retention of the fabric, improve its appearance, and make it feel soft.
Shearing is a process in which a shearing machine is used to remove unwanted hair on the surface of the fabric. Its purpose is to make the fabric texture clear and the surface smooth, or to make the pile or suede surface of raised or raised fabrics neat. Generally, products such as wool, velvet, artificial fur, and carpets require shearing.
Soft finishing: mechanical finishing and chemical finishing. Mechanical soft finishing is achieved by rubbing and bending the fabric multiple times. The softening effect after finishing is not ideal. Chemical softening finishing is to apply softening agent to the fabric to reduce the friction coefficient between fibers and yarns, thereby obtaining a soft and smooth feel, and the finishing effect is significant.
Post time: Nov-20-2023