Finishing weaving process parameters of elastic knitted fabrics Weaving coil length: 375mm/100 stitches for the first and third weaving systems; 165mm/100 stitches for the second and fourth weaving systems; 120mm/100 stitches for the first and third weaving systems. (6) The bending depth of the loop is woven at a depth of 1.6 mm; the depth of the woven knit is 1.3 mm. (7) Yarn input mode The first and third knitting systems input 28tex cotton combed knit denim yarn; 2, 4 Rectangle Wool Braided Rugs,Wool Braided Carpet Rug,Braided Wool Rug,Wool Rugs for Living Room Hengshui Namei Imp.&Exp. Co.,Ltd. , https://www.nameirug.com Finishing of stretch knit fabric
Weaving system input 33tex 100% bamboo pulp fiber filament yarn; first, third
The braiding system inputs 44dtex spandex elastic fiber filament yarn. (8) Braiding tension tension coefficient 3.7. The tension is pulled to be as small as possible on the basis of ensuring normal weaving, so as to prevent excessive operation and increase the weight of the equipment, and accelerate the wear of the knitting needle and the lower needle cylinder. (9) Raw material weaving with a proportion of 28tex cotton combed knit denim yarn 65%; 33tex 100% bamboo pulp fiber 31%; 44dtex spandex elastic fiber 4%. (10) Physical parameters of the fabric The weight of the fabric blank is 300g/m2; the weight of the fabric light square is 330g/m2; the width of the fabric is 180cm. The knitting results of the woven twill composite elastic knit denim fabric of the twill composite elastic knit denim fabric are shown in 3. 3 The weaving result of the twill composite elastic fabric The braided coil length: 1, 3, 5
Weaving system 375 mm / 100 needle; 2, 4, 6 knitting system 165mm / 100 needle; 1, 3, 5 knitting system 120mm / 100 needle. Yarn input method: the first, third, and fifth knitting systems input 28tex cotton combed knit denim yarn; the second, fourth, and sixth weaving systems input 18.5tex pure cotton white yarn; the first, third, and fifth weaving systems Enter 22dtex spandex elastic fiber filament yarn. Raw material weaving with a proportion of 28tex cotton combed knit denim yarn 75%; 18.5tex pure cotton original white yarn 22%; 22dtex spandex elastic fiber 3%. Fabric physical parameters fabric blank square weight 280g / m2; fabric light blank square weight 300g / m2; fabric optical blank width 160cm. 4 Stretched knit denim fabric finishing finishing stretch knit denim fabric finishing finishing mainly includes color quilt weft, washed stone grinding and non-iron setting. The elastic knit denim garment is washed and processed, which is the key process to realize the unique characteristics of the denim garment. Only the washing process can show the cowboy clothing rough and unrestrained denim effect. Washing process refers to the process of turning the garment together with a certain proportion of excipients in a specific device, relying on physical and chemical effects to achieve a specific intrinsic and appearance effect of the garment, thereby obtaining a soft hand and a new face appearance. At present, the washing process mainly includes washing, stone washing, sand washing, enzyme washing and pickling [6-7], and the pickling method includes a pumice pickling method, a spray pickling method, a chlorine bleaching method and the like. In the actual washing process of denim garments, two or more washing processes can be employed to achieve a specific effect.
Cellulase Stone Milling In the stonewashing process, cellulase can be divided into acid cellulase and neutral cellulase according to the pH requirement of the water bath. The optimal use of acid cellulase has a pH of 4.5 to 5.5 (sensitive to pH and low price). The optimal use of neutral cellulase has a pH of 6-8 (stable pH and high price). Process conditions: cellulase 1.0% to 1.5% (weight of clothes); pH 4.5 ~ 5.5 (acid enzyme), 6 ~ 8 (neutral enzyme); treatment time 45 ~ 120min; The temperature is 50-60 ° C; the amount of pumice is 0-0.5 kg/kg of clothing (depending on the degree of oldness); the bath ratio is 1:10-15. Stone washing with cellulase can greatly reduce the amount of pumice (only about 25% of the original pumice), or even pumice. At the same time, the washing capacity of the washing machine can be increased to reduce environmental pollution. Since the grinding of the pumice on the clothes is reduced, the clothes are softer, more natural and brighter in color after washing. Dyes that fall off in the water bath during the stonewashing process, when the pH value is below 6, there is a significant coloration; thus the denim stitching and the inner pocket material become blue, and the finished blue/ The white contrast style is reduced. When the water bath pH is above 7, the staining will be significantly reduced.
Therefore, neutral cellulase is more suitable for high-grade clothing finishing. Acidic cellulase can be used in low grade and various stone rinse processes. 4.2 Bio-polishing finishing Bio-polishing finishing prescription: bio-polishing enzyme 0.5%～2.0% (weight of clothes), temperature 45～55 °C, time 30～60min, penetrant 0.5g/L, pH value 4.5 to 5.5 (adjusted with 98% HAc 0.5 ml and sodium acetate 0.5 g per liter), bath ratio 1:10-15. After being cleaned by bio-polishing enzymes, the surface fluff is almost invisible, and it is not easy to cause pilling, and the moisture absorption, drape and hand feel of the clothes are obviously improved. The method of controlling the weight loss of clothing by 3% to 5% is used to discriminate the smoothing effect, and there is no excessive damage to the strength. However, after bio-polishing, some color shades change greatly, so pay attention to it during use. Pure cotton finishing non-iron resin finishing process formula: LF-2 resin (American Rising Sun products) 100 ~ 130g / L, 531 (magnesium chloride catalyst) 25g / L, bisamino silicone emulsion AV-910 40 ~ 60g / L, non-ion penetrant 2 ~ 4g / L, bath ratio 1: 5 ~ 10, room temperature 10 ~ 20min. Process: Dehydration after immersion in clothes (with liquid rate 70%～80%)→drying (drying below 65 °C to moisture content 5%~10%)→Roasting and setting→Hanging baking (150～160°C, 5 to 15 min). After the non-iron finishing, the clothes can meet the customer's needs in terms of hand feeling, elasticity, anti-wrinkle and residual formaldehyde content (100mg/kg or less).
Process flow and product quality index Total process: cotton fiber cation modification→paint dyeing→dyed denim yarn→matching Coolmax fiber, bamboo pulp fiber and spandex elastic fiber→three-dimensional composite knitting woven→stretch knit denim fabric→stretch knit denim Take the blank sample → free ironing and washing and finishing → multi-functional stretch denim clothing. Product quality indicators: width 140 ~ 200cm; weight 180 ~ 400g / m2; negative oxygen ion concentration > 3 500 / cm3; water absorption > 220%; drip diffusion time <2.0s; wicking height: horizontal > 166mm, longitudinal >172 mm; evaporation rate>0.30g/h; Escherichia coli bacteriostatic rate>75%; Staphylococcus aureus bacteriostasis rate>85%; Candida albicans bacteriostasis rate>79%; bursting strength 120～ 300N; shrinkage rate (straight transverse) -4%/-7%; color fastness: discoloration >4, staining >3; drape coefficient <25%; air permeability 1.2 m3/m2·s; friction coefficient : Straight to <1, horizontal <1.1. All of the above indicators meet and exceed industry standards. This project uses bamboo fiber, functional polyester fiber and knitted denim yarn as the combination raw materials, adopts knitting compound weaving technology to realize fabric weaving, and cooperates with finishing technology to successfully develop permanent moisture absorption, quick drying, antibacterial and deodorization. Functional composite knit stretch denim fabric. Not only advanced technology, short production process, obvious energy saving and consumption reduction, but also novel products, economic benefits, product performance fully meets design requirements, and can meet market demand. Sdfweggfnyrrty