Teach you how to chemical finishing of silk fabrics-Iota

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News > Dynamic industry > Teach you how to chemical finishing of silk fabrics

Teach you how to chemical finishing of silk fabrics

Silk fabric excellent gloss, color and feel must through reasonable and strict after finishing to highlight and strengthen, in addition to after finishing the formation of the unique fabric style outside, silk fabric, functional finish has become more and more important, the function of sorting through chemical consolidation to achieve. These improvements silk fabric performance include the crease resistance, antistatic and waterproof and oil repellent, flame retardant, dimensional stability, wash can wear, and fluffy and wire Ming sense.
Weight gain: due to the removal of the sericin, the degummed silk could lose weight by 20% to 50%, silk gain weight can make up for the loss in weight, and impart the fabric more bulky feel and better filling properties, improve the fabric drape of, giving fabric better wash and wear performance. Increasing weight three, plant weight gain, minerals increase weight and graft weight gain (polymer weight gain), currently the most advanced method is the use of polymer grafted gain method, this method the weight increasing treatment becomes very easy. Increasing by grafting method mainly using methyl acrylic amide and ammonium persulfate on silk fabric processing, weight gain and can also improve the fabric's Dyeing Properties of silk fabrics, but at present, there are still some finishing advantageous in before dyeing or staining after graft, and increasing by grafting methods still need further industrialization, only a handful of producers, such as for silk necktie twisted yarn producer by the weight method.
Soft: in order to obtain lasting softness of silk fabric, it is necessary to use chemical softener, commonly used persistent softness agent is organic softening agent and silicone softener category, including oils, waxes and fats; cation is mainly some imidazoline, ethoxylated fatty amines; anion - stearic acid, acid, palmitic acid and fatty alcohol sulfate or sulfonate; non ion -- long chain alcohol, acid, glycerol, oil and wax, polyethylene glycol (PEG), poly ethoxy ester; silicone emulsion, poly dimethyl siloxane and poly methyl hydrogen siloxane, amino silicone oil etc.; polyethylene emulsion. There is a tendency of epoxides with silicone, can impart the fabric softness, anti wrinkle and anti yellowing properties.
Antistatic: available monomers grafted silk, to improve the performance of the accumulation of static electricity, the electrostatic aggregation fabrics with moderate reduction, antistatic agent mainly has two kinds, one is the electrostatic eliminating agent, its main function is to improve the fabric's hygroscopicity, solubility of vinyl monomers with specific acid finishing silk fabrics with specific water, or deposited in the fabric of metal particles or specific, with silver coating, can generate electrostatic eliminating effect; the other is the antistatic agent, its principle is by reducing the fiber, fiber friction to impart the fabric antistatic property, the general use of alkaline specific lubricant, such as metal oil and butyl stearate etc..
Anti wrinkle: compared with synthetic fibres and silk easy care performance is poor, so the need of silk good crease recovery (CR) consolidation to improve the dimensional stability, washing the wrinkle recovery. The existing anti crease finishing agent consists of a cross-linking agent, increase reuse of urea formaldehyde pre shrinking body, dry and wet fold increase in performance of dimethylol dihydroxy ethylene urea, silicone, acrylic acid salt soft recovery agent and catalyst. In addition, improving silk fabric dry and wet Cr, tearing strength, elasticity and increase performance of other anti wrinkle agent and containing compounds of various N-methylol derivatives and so on finishing agent.
Waterproof and oil repellent: principle of waterproof and oil repellent finishing is reduced the silk fabric surface energy in the air, in order to stop the traces of oil or oily stain, fabric with surface finishing agent most commonly used thing Teflon, other important waterproofing agent and aluminum compounds used alone or in and soap a dissipation of use and wax agent, when natural silk with hexafluoro propylene, fluorine ethylene, vinyl chloride and acrylonitrile steam grafting, waterproof, oil repellent, anti acid mine and light stability will improve.
Flame retardant: silk has self extinguishing, and the performance is by having a cyclic core of halogen acid reaction products, as given by the chlorendic acid and thiourea, but still unable to secure passage of a vertical flame test. Therefore, it is necessary to flame retardant finishing. Hexachlorobenzene (HCB) titanium, tetrachloride titanium and zirconium chloride could give the fabric a good flame retardancy and non ion complexes of zirconium, titanium and tungsten can also as a silk fabric of flame retardant finishing agent. In addition, specific phosphorus compounds can also improve the flame retardancy of the silk fabric, and anti wrinkle and shrink also improved.
Antibacterial, antibacterial finishing in the finishing of silk fabric has become more and more popular, the main method is the rolling liquid method and impregnation method or spray method of fabric processing, finishing liquid including n - (2, 2 - vinyl chloride) salicylamide. 0.01%~0.25% solution, salicylic anilides and chloride ten second alkyl trimethyl amine and phenolic compounds applied widely, because of their ability to moderate can emulsion deposited on the fabric surface is a composite of polymer films.
Lightfastness: silk of light chemical sensitivity has been one of the biggest obstacle to the application of silk, which is caused by ultraviolet radiation, that is exposed in the sun plants can absorb ultraviolet radiation, because silk light stability is very important for the job. Therefore, it is necessary to of silk fabric to prevent radiation free arrangement, at present, we mainly use the ultraviolet absorbent or light stabilizer to silk fabric finishing, such as benzene ester and salicylate, etc., but this kind of finishing agent development still need to further study.

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