Countries around the world in recent years with increasingly stringent environmental requirements, especially for the control and use of water resources increasingly high, textile printing and dyeing industry faces enormous challenges. In response to this situation, textile machinery manufacturers and suppliers of dyes constantly updated technology, especially for knitted fabric dyeing and finishing. In China, woven fabrics of continuous processing has a lot of years of history, and for the continuous processing of knitted fabric, in recent years have launched Lixin Gao Yue company for the development of the market, the introduction of a new continuous bleaching cotton knits new processes and equipment
Traditionalknittedscouring and bleachingprocessareusedin the overflowtankshort processof the way,andwoven fabricsofrelated processesdiffer,depending onthe reasonknittedandwoven fabricsinformingdifferent ways.Knittedthe processing ofthe firstchannel,nosizing,butcontainingalargeamountofwovenfabricorthePVAstarchslurry.

Knittedsimultaneouslyduetoitsowncharacteristics,thetensionis verysensitive totension adjustmentis not good, it willaffect the feelorthestyle, sothe previousprocess,generallya looseknittypeprocessingmeans;thewoven fabricin the production processto adjusttoa large tension,or will causedefectssuch aswrinklesof theproduct.Whilethe generalprocessing ofknitted fabricis not required aftera shortdryingprocessrequiresonlydehydrationcanbe,andwovenfabricsafterlongafterscouring and bleachingprocessesare carried out, dry cloth.This is mainly becauseeven after A knitted continuous scouring and bleaching, scouring and bleaching with intermittent contrast
Overflow cook traditional bleaching process, the application of the knitted fabric has been for decades, and its technology and equipment has been very mature. But for cotton knits in terms of short flow impact for the quality of the knitted fabric is obvious. As used in the dye vat pretreatment rope, fabrics wrinkle easily and creases, for high-quality products, these problems pre-treatment process is not easy to detect, in the subsequent dyeing process will be exposed, and even fault cloth . While pre-treatment vat when its whiteness is not satisfactory, especially for those with white products. This is associated with the vat in a closed environment. For the sensitive color cotton knitted products or containing Modal, Rayon and other fiber products, pre-treatment carried out in a vat, tend to produce subsequent staining problems. The knitted fabric in a continuous process pre-treatment, the more white whiteness, especially with white product, which is mainly due to the long car production, using open-ended device, additives can better play. While continuous device, flat pieces of fabric processing methods have to worry about wrinkles and creases of the generation. Products for sensitive color, continuous processing methods to make knitted more uniform left, right, not the fabric dyeing processing in the subsequent color flower or color spots appear and so on. And because of continuous production and batch production of equipment different, not the same for equipment cleaning, intermittent production vat
Left, rightfabricis moreuniform, easy todyethe fabricin the subsequentprocessing offlower colororcolor spotsappearand so on.And because ofcontinuous productionandbatchproduction of equipmentdifferent,not the sameforequipment cleaning,intermittentvatproduction,after a long timewill inevitablyproducesilica scaleattached to thedevice,the need for timelyclean-up;For continuousstyle productionequipment, asauxiliarieswillbe discharged,and the devicewithouta long soakinasolutioncontainingadditives,soequipmentcleaningandmaintenanceeasy,usefulfor improvingproduct quality.
Intermittentmode of production,ifthe fabriccontainingironand other impuritiesin the productionprocess can easilyproduceholesand otherdefectsof the fabriccloth, and thisphenomenon isdifficult to detectintermittentproduction, oftencause a lot offault clothevenis awaste;continuous production, even though therewill beholesto discover.Can avoidwaste.Intermittentproduction methodsforeasycrimpingofproducts, but alsoatroublesome issue.Curlingproducts in thevatpretreatmenttend to produceleft-rightcolor,and thiscoloris difficult to detectthe previousprocess.The firstin a continuousprocess,as long as controlthe tensioncan solvesuch problems.
But forcontinuousscouring and bleachingthe way,also has its drawbacks, mainlythe following aspects:
(A)thehead and taildifferenceforcontinuousscouring and bleachingphenomenonshould be noted thatpoorhead and tail,this time needto be adjustedonthefeeding method,to note thatthe concentration ofpowerand temperature;especiallyin the production processshouldpayattention totimelyadditionaladditives.This requiresadditivessuppliers andequipment supplierscooperate with each other.
(2)in a continuousproduction process requirespatienceand professionalismoperatives.
(3)If thewhiteness ofthe formerprocessis not enough, reprocessing is necessary,will appearblastingis reducedand, therefore,mustbe accuratelycalculatedin theadditive.
Twoknittedcontinuousprocessing andbatchpre-treatmentcost comparison(Table1)
Table1knittedcontinuousprocessing andbatchpre-treatmentcost comparison
Processcontinuousscouring and bleaching, scouring and bleachingoverflow
Scouring agent(g / kg) 3 5
Chelating dispersant/demineralizationagent(g / kg) 7.5 0 ~ 5
Hydrogen peroxide stabilizer(g / kg) 5 5
Wrinklelubricant(g / kg) 0 0 ~ 5
Dehydrogenase(g / kg) 0 0 ~ 3
50%caustic soda(g / kg) 8 ~ 12 30 ~ 40
27.5%hydrogen peroxide(g / kg) 25 ~ 40 50 ~ 120
Acetic acid(g / kg) 1.5 5
Water consumption(L / kg) 12 30 ~ 40 (bath ratio1:10)
Steam(kg / kg) 0.8 ~ 1.5 3
MACLEOD continuous pre-treatment equipment featuresWashing zone using the demineralizer UNIVERSA unit, which spray washing method using stacking and handling of the fabric , piling can be liquid or liquid to soak the only way to force the fabric spray processing. UNIVERSA unit may be sufficient soaking the fabric and the swellable , the impurities on the fabric fully expanded , so that the fabric can be uniformly impregnated prepreg before , the fabric uniformly with liquid ; using Sintensa efficient washing tank unit , which is characterized by :( A ) small water capacity , reduce water consumption and speeding up the liquid circulation, strengthen the exchange rate .( 2 ) washing ability: liquid immersion, spray washing triple shock washed and washed design , the fabric is fully washed. Which shocks washing our unique rotor design , rotor and drum through the turbulence generated by the interaction of sustained penetrating the fabric , not only to achieve a strong washing effect, while no effect on the fabric of the hair surface impact .( 3 ) low tension : tension is low mainly due to reasons independent of each drum variable frequency drive control , Loadcell tension sensors and process control .By Universa unit and Sintensa fabric washing unit , you enter into efficient washing unit , we use Elasto-dip unit :( 1 ) into the fabric rolling over is low, left, right uniform, with liquid stability. Lixin production of efficient three-roll rolling cart , rolling over about 60% can be achieved . S rolls out of cloth fabric rolling over ways to ensure high and stable ( rolling over rate at 120 % ~ 150% )( 2 ) fabric with liquid evenly. Overflow waterfall spray the fabric fully absorb and exchange of additives to improve the exchange rate .
( 3 ) Stable dip bins before and after the control program to ensure the fabric with liquid constant before and after to avoid the problem of poor color and horses .By dipping the fabric into the bins after the steamer position , because the fabric of cotton fiber containing mineral oils and impurities , making high-grade products need to be stacked steaming , which is similar to woven fabrics . Macleod -designed Unirelaxa steamer has the following characteristics :( 1 ) high temperature : steam box using direct steam pass into the box at the bottom of the water, saturated steam produced by heating water heating methods , internal cabinet temperature can reach to 102 ~ 104 ℃.( 2 ) Temperature stability: the steam box made into cloth and the cloth air sealing liquid seal sealing device to ensure the housing temperature stability.( 3 ) Temperature uniformity : steam box at the top of the coil heating to ensure uniform and stable internal temperature steam box to avoid the generation of top condensate .( 4 ) flexible control : steam box out of cloth roll flexible control of the position detection speed of the cloth , because cloth fabric will shrink during stacking phenomenon, a test is required to control the speed of the cloth , to avoid piling in the box body inside the cloth overload or pulling an empty phenomenon.MACLEOD in continuous production equipment and also carry out . This intermittent completely different, the device is equipped with an automatic pH adjustment system, according to the pH of the formulation for precise adjustment.Steam (kg / kg) 0.8 ~ 1.5 3
5Equipmentproductivity andScope
MACLEODknittedcontinuouspre-treatmentequipment forallknitted cottonproducts as well asregenerated cellulosefiberknittedproducts.Itsproduct mixaccording to differentproduct formsand flexibleconfiguration.Coveringall types ofknitted fabricsincludingfleece,cotton, plaincloth.Its production efficiencyalsovariesaccording tothe product structureset.
Yield andspeedrelated(removeforcloth, heating,cleanmachinetimeper dayfor20 h)according tothe size ofweightpredetermined vehicle speed, as follows:
Weight> 190 g/m2,speed of35 m / min,fabricwidthif it is160 ~ 180 cm,daily output of> 12.7 ~ 14.3 t;
Weight≤ 190 g/m2,speed50 m / min,if thewidthof clothis160 ~ 180 cm,daily output≤ 18.2 ~ 20.5 t.
Summary
MACLEODknittedcontinuouspre-treatmentdevicescanbedyedinadye factoryequipmentwithout increasingthe case ofdyeing clothto improvethe production capacityofthedyeingmachineis mainlyplayeddyeingstrengthscontinuous productionand dyeing machinecolor contrastsensitivityimproved significantly, the basicThere is nodyeflowerphenomenon.
MACLEOD continuous pre-treatment equipment features
Washing zone using the demineralizer UNIVERSA unit, which spray washing method using stacking and handling of the fabric, piling can be liquid or liquid to soak the only way to force the fabric spray processing. UNIVERSA unit may be sufficient soaking the fabric and the swellable, the impurities on the fabric fully expanded, so that the fabric can be uniformly impregnated prepreg before, the fabric uniformly with liquid; using Sintensa efficient washing tank unit, which is characterized by:
(A) small water capacity, reduce water consumption and speeding up the liquid circulation, strengthen the exchange rate.
(2) washing ability: liquid immersion, spray washing triple shock washed and washed design, the fabric is fully washed. Which shocks washing our unique rotor design, rotor and drum through the turbulence generated by the interaction of sustained penetrating the fabric, not only to achieve a strong washing effect, while no effect on the fabric of the hair surface impact.
(3) low tension: tension is low mainly due to reasons independent of each drum variable frequency drive control, Loadcell tension sensors and process control.
ByUniversaunit andSintensafabricwashingunit, youenter intoefficientwashingunit, we useElasto-dipunit:
(1)intothefabricrollingoveris ow,left, rightuniform,with liquidstability.Lixinproduction of efficientthree-rollrolling cart,rolling overabout 60%can be achieved.Srollsout of clothfabricrolling overways to ensurehighand stable(rolling over rateat 120% ~ 150%)
(2)fabricwith liquidevenly.Overflowwaterfallspraythe fabricfully absorb andexchange ofadditivesto improve theexchangerate.
(3)Stabledipbinsbefore and afterthe control programto ensurethe fabricwith liquidconstantbefore and afterto avoidthe problem of poorcolorandhorses.
Bydippingthe fabricinto thebinsafter thesteamerposition, becausethe fabricof cotton fibercontainingmineraloilsandimpurities,makinghigh-gradeproductsneedtobestackedsteaming, which issimilar towoven fabrics.Macleod-designedUnirelaxasteamerhas the following characteristics:
(1)high temperature:steam boxusing directsteampass into thebox at the bottomofthe water,saturated steamproduced by heating waterheating methods,internal cabinettemperature can reachto102 ~ 104 ℃.
Temperaturestability: thesteambox madeintoclothandtheclothair sealingliquid sealsealingdevice to ensurethe housing temperaturestability.
(3)Temperature uniformity:steam boxat the top ofthe coilheating to ensureuniform and stableinternal temperaturesteam boxto avoidthe generation oftopcondensate.
(4)flexible control:steam boxout of clothrollflexible control ofthe position detectionspeed ofthecloth, becauseclothfabricwillshrinkduringstackingphenomenon,a test is requiredto controlthe speed ofthecloth, to avoidpilingin the boxbodyinside theclothoverloadorpullingan emptyphenomenon.
MACLEODincontinuousproductionequipmentandalsocarry out.Thisintermittentcompletely different,thedevice is equipped withan automaticpH adjustmentsystem, according tothe pH ofthe formulationfor preciseadjustment.
equipmentproductivity andScope
MACLEODknittedcontinuouspre-treatmentequipment forallknitted cottonproducts as Yield andspeedrelated(removeforcloth, heating,cleanmachinetimeper dayfor20 h)according tothe size ofweightpredetermined vehicle speed, as follows:
Weight> 190 g/m2,speed of35 m / min,fabricwidthif it is160 ~ 180 cm,daily output of> 12.7 ~ 14.3 t;
Weight≤ 190 g/m2,speed50 m / min,if thewidthof clothis160 ~ 180 cm,daily output≤ 18.2 ~ 20.5 t.
6 Summary
MACLEODknittedcontinuouspre-machinecolorcontrastsensitivityimprovedsignificantly,thebasicThereisnodyeflowerphenomenon.