Moisture Regain Control Of The Sized Yarn

Sizing is an important working procedure in the mill, Key guideline controlling sizing are sizing rate ,elongation rate and left moisture .In order to improve efficiency the control of sizing left moisture was studied. The paper tested and analyzed numerical value and relativity, Was investigated remarkable linearity relation between surrounding humidity and sizing left moisture. Sizing speed and drying cylinder temperature is important to the sizing left moisture . Inspecting warp in many point and temperature by infrared ray, we can control sizing left moisture regain even effectively.The control of sizing left moisture is one key factor in the process .If sizing left moisture is low ,weaving may be difficult, If sizing left moisture is high ,warp is easy to adhere together in the warp beam .Moisture is important factor influencing plasticity and flexibility of sized yarn. Warp made of difference fiber can show different mechanical behavior also and the strength. and elongation of the yarn. The drying cylinder temperature influences sizing moisture regain. How to control left moisture is achieved by accommodating speed and drying cylinder temperature. Two factors can change moisture regain directly. The faster speed the higher left moisture . .In order to know the influence of the speed on left moisture , different numerical values are analyzed in relation between speed and left moisture. Higher drying cylinder temperature will result lower left moisture. Numerical value is analyzed on drying cylinder temperature and left moisture. While drying cylinder temperature becomes high, moisture will reduce in warp ,heat exchange also become slow in warp. Therefore moisture change becomes slow .Sizing pick-up also influences sizing left moisture, High size pick-up illustrates that more water will be vaporized in warp ,and cost more heat energy .Within a short time ,to conduct the same amount of heat, more water leave, the left moisture will be high. Yarn tcx also influences sizing left moisture. Higher warp tex means more higher diameter and thicker warp ,It is difficult for warp to disperse heat and wet. Left needs added heat to vapor water. sizing left moisture also is low .Different material yarn influences sizing left moisture. hydrophilic material will result in better, moisture absorption wet disperse is bad ,In same condition left moisture is high. Yarn covering factor density influences sizing left moisture. Yarn density is low adding yarn covering factor and density bring little change to left moisture .Under certain condition, yarncovering factor and density increase left moisture is high. The surrounding humidity and blowing flow influence sizing left moisture. Left moisture will be high as surrounding humidity is high. Linearity analysis is done ,Remarkable linearity relation between surrounding humidity and sizing left moisture is conducted. Lower blowing flow, wet air can not be discharged, Water is not easy volatile in wrap, left moisture will be high .Sizing left moisture change in different sector in dry room is also analyzed .Dry starting sized warp mostly warm-up itself that absorb heat from dry cylinder. Then warp come into main dry section, Temperature of sized warp rise faster . Moisture recede will be faster. When moisture recede to general order moisture ,It reduce very slowly.Setup dry temperature in different dry room section. In pre-heat process is done there is more moisture in warp. Drying temperature should be set a little higher .Then drying temperature should be adjusted lower gradually. That can ensure required a mount heat to vaporize water in warp. The temperature of warp is not too high .Save energy in sizing is analyzed. Save energy can cost low so increase sizing speed and guarantee safe manufacture...