What is the purpose of finishing fabrics
Through physical, chemical or combined physical and chemical methods, improve the appearance and intrinsic quality of workwear fabrics, and improve wear performance and other application properties, or a finishing process that gives workwear fabrics some special functions.
1Stabilize the size and shape of the fabric
Tenter – using cellulose, silk, wool and other fibers under humid conditions It has certain plasticity, gradually widens the effective width of the fabric to the specified size, and performs a finishing process of drying and stabilization, also known as width setting.
Heat setting – refers to the heat treatment of synthetic fiber fabrics under certain tension to make them Dimensionally and morphologically stable finishing process.
2 Improve the appearance of work clothes fabrics
Singeing: The fluff on the surface of cotton and its blended chemical fiber fabrics is durable Direct flame burning removal makes the surface clean, which facilitates the smooth progress of subsequent finishing and ensures product quality. The flame temperature of singeing is usually between 900 and 1000°C, and the surface temperature of the hot metal plate can also reach 800°C, which is higher than the decomposition temperature or ignition point of various fibers.
Finishing after rolling: through the mechanical pressure and moist heat of the rolling machine, With the help of the plasticity of fibers, the surface fibers are arranged in parallel to improve the smoothness and flatness of the surface, produce regular reflections on the surface, and thereby improve the color of the fabric.
Post-embossing finishing: The post-embossing finishing machine uses the same heated hard roller and a soft roller. The surface of the hard roller is engraved with a positive pattern, while the soft roller is engraved with a negative pattern, and the two match each other. During post-finishing, the plasticity of the fabric under hot and humid conditions is used to press the fabric with Yin and Yang rollers to produce a concave and convex pattern effect on the fabric.
Sanding: After finishing, the fabric can produce a suede surface, which improves the feel and makes it comfortable to wear. , can be done on a brushing machine, and the fabric will produce a suede surface after repeated friction.
3 Improve the soft feel of work clothes fabrics and finishing:
Softening finishing is a finishing that makes up for the stiffness and roughness of the fabric and makes the fabric feel soft. process. It includes mechanical soft finishing, chemical soft finishing and stiff finishing.
Mechanical soft finishing mainly uses mechanical methods to soften the fabric under tension. Knead and flex several times to reduce the rigidity of the fabric and restore it to the appropriate softness.
Chemical method uses softeners to reduce the friction coefficient between fibers to obtain Soft effect.
Stiff finishing is to give the fabric a smooth, stiff, thick and full feel. It also improves the strength and wear resistance, and also improves the hanging and appearance.
After stiffening and finishing, it is usually combined with setting the width, and softening agent is added to the slurry. In order to improve the overall feel, similarly, for simple soft finishing, stiffening agents should be added to strengthen the body and bones.
4 Improve the durability of work clothes fabrics
Moth-proofing finishing: The additives used for moth-proofing finishing should be efficient and low-toxic, have no side effects on the human body, and do not affect all aspects of the fabric’s performance. Commonly used moth-proofing finishing Post-finishing methods include wool chemical modification and moth-proofing agent post-finishing.
(1) Wool chemical modification method: forming new and stable wool through chemical modification When moths eat this cross-linked structure, they will be difficult to digest and eventually killed, thus improving the moth-proofing performance.
(2) Anti-moth agent post-finishing method: After finishing, the wool fiber is directly Bring chemicals that have a killing effect on moths. These chemicals can be directly immersed into the moth’s cortex, or poisoned through the respiratory and digestive organs to kill them.
5 gives the fabric great performance
Common ones include water-blocking finishing, water-repellent finishing, and fire-proof finishing.
Water blocking finishing is to apply PU coating to the fabric to prevent water and air from Impermeable; water-repellent finishing changes the hydrophilicity of the fiber surface to hydrophobicity, making the fabric both breathable and not easily wetted by water.
Fire-proof finishing: Fabrics that have been finished have varying degrees of ability to block the spread of flames. Ability to quickly stop burning after leaving the fire source.
There are three ways to perform fire prevention finishing:
(1) Exhaustive combustion method: Fire retardant and cellulose fiber are combined with ionic bonds or The covalent bond makes it insolubilized in the fiber to achieve durable fire retardant effect.
(2) Stock solution method: Add the fire retardant directly to the spinning solution.
(3) Copolymerization method: Add the fire retardant to the polymer chain segment, Make the fabric have qualified fastness such as washing resistance, bleaching resistance and perspiration resistance, and will not be absorbed by the skin. Printing and dyeing factories mainly adopt this method.
AAAFSGRETEGSDFW
Disclaimer:
Disclaimer: Some of the texts, pictures, audios, and videos of some articles published on this site are from the Internet and do not represent the views of this site. The copyrights belong to the original authors. If you find that the information reproduced on this website infringes upon your rights, please contact us and we will change or delete it as soon as possible.
AA
