Views: 7 Author: Site Editor Publish Time: 2022-12-16 Origin: Site
A.That is,one gray cloth is sewed into a large roll or a box car,which is called one cylinder.The number of one cylinder varies according to the processing of different cloth types.
B.Blank inspection is mainly to control the quality of grey cloth to see whether there are abnormalities such as drawing, weft, dead folding,yellow spot and mildew.At the same time, pay attention to check whether the cloth type is consistent with the requirements.Under normal circumstances,a batch number is required.Pay attention to the inspection.
A.In order not to warp the yarn before dyeing, so that the yarn will not be starched.
B.If the desizing is not clean,there will be colored flowers,pulp spots and other defects on the cloth surface after dyeing.
C.After desizing,it is generally necessary to wash it with water, otherwise the pH value of the fabric will be high and there will be abnormalities such as poor dyeing.
D.Generally,there are two kinds of desizing methods:in cylinder desizing and long vehicle desizing.Generally,the former has good desizing effect but low efficiency.
A.Normal temperature roll dyeing:generally,the temperature is below 100 degree,which is mainly used for dyeing semi gloss nylon taffeta,nylon oxford,nylon twill,etc.This method is easy to produce head and tail color difference, left middle right color difference,crease and other abnormalities.
B.High temperature roll dyeing: the temperature is generally about 130 degree,which is mainly used to dye polyester taffeta,n66,nylon matting cloth,polyester oxford (filament),etc,this method is easy to produce head and tail color difference,left middle right color difference,crease,color spot and other abnormalities.
C.Overflow dyeing: the temperature is about 100 degree to 130 degree.It is mainly used to dye polyester,such as Chunya spinning,peach skin velvet,polyester oxford,Taslon,nylon polyester weaving,etc.Polyester spinning can also be used for overflow dyeing.At the same time,this method is also used for nylon spinning and other wrinkle dyeing requirements.This method is easy to produce color flower,chicken claw mark,straight strip dyeing and folding and other abnormalities.
D.Warp dyeing:It is suitable for all kinds of cloth,but it should be used reasonably according to the quality requirements.The dyeing temperature can be controlled above 100 degree to 130 degree .This method is easy to produce abnormalities such as shallow edge and layer difference.
A.Cotton dyeing:Long car dyeing (large batch is required),pad dyeing (large batch or small batch) and overflow dyeing (medium and small batch) are generally adopted.Reactive dyes (with good fastness),direct dyes (with poor fastness) and vat dyes (with the best fastness) can be used.
B.N / C and C / N dyeing:Overflow dyeing is generally adopted.Cotton is dyed first and then nylon.Reactive dyes are used for cotton and acid dyes are used for nylon (good fastness). Direct dyes are also used for one-time dyeing (poor fastness).
C.T / C and C / T dyeing:Overflow dyeing is generally adopted.Polyester is dyed first and then cotton.Polyester uses disperse dyes and cotton uses reactive dyes (with good fastness).Some also use long car dyeing, one-time dyeing, and direct dyes (poor fastness).
A.Acid dye: it is used to dye nylon fabrics. Generally,it is necessary to fix the color to improve the color fastness.It is also necessary to pay attention to the selection of dye combination and the use of reasonable dyeing process.Improper selection or high dosage of color fixing agent will cause hard hand feeling.
B.Disperse dyes:Used to dye polyester fabrics.Generally,reduction washing should be used to improve the color fastness.At the same time,attention should be paid to the selection of dye combination and the use of reasonable dyeing process.Disperse dyes pay special attention to transfer dyeing and sublimation fastness.
C.Reactive dyes and direct dyes:belong to low-temperature dyes.
A.There are two types of non-contact drying: non-contact dryer and setting machine.There is no contact between the fabric and the heater.The purpose of drying is achieved by spraying hot air on the fabric.It is mainly used for drying overflow dyeing products to maintain the fluffy and rich hand feel of the fabric. The cost is higher than that of drum drying.
B.Drum drying: the cloth is in direct contact with the drum,and the purpose of drying the cloth is achieved by heating the drum.For the products mainly used for roll dyeing and warp shaft dyeing (such as nylon spinning,polyester spinning,nylon oxford,polyester filament Oxford,etc.).Taslon can also be dried on the drum dryer first (but only 60 percent or 70 percent of it can be dried first to avoid too hard hand feeling),and then go to the setting machine for water splashing processing to improve the degree of water splashing. Low drying cost.
A.The intermediate inspection shall test various color fastness of the cloth, and pay attention to the quality of the cloth,such as crease,color difference (color difference,cylinder difference,match difference),color flower,color dot,dirt,oil stain,drawnwork,weft stop,warp strip,etc.
B.Control the defective products from entering the lower section to prevent increasing the cost, because after finishing and processing, some abnormal fabrics cannot be repaired or it is very difficult to repair,so the intermediate inspection is very important.
C.The cloth shall be rearranged and sewed before entering the rear section.
A.After setting, the physical and chemical properties of the fabric are relatively stable.For example,shrinkage,width,warp and weft density are not easy to change,and the cloth surface is relatively flat.At the same time, some functional processing can also be done in the shaping section,such as watering (waterproof),softness,resin,flame retardant,antistatic,super watering (Teflon treatment),moisture absorption and perspiration,antibacterial and deodorization, etc.
B.Due to the high setting temperature, attention should be paid to the color changes before and after setting,especially some sensitive colors,such as gray, military green, light khaki,etc.Products are generally required to align with the color after finalization.Setting can control the width,warp and weft density and shrinkage of cloth,especially the control of shrinkage,which directly affects the processing cost,so special attention should be paid.(the shrinkage requirement of our order is generally 3 percent for water washing shrinkage and 2 percent for strict water washing shrinkage).The main factors affecting the setting effect are the setting temperature,speed and overfeeding.
① Water splashing and shaping make the fabric waterproof and dustproof;
② Soft setting makes the fabric feel soft and smooth,but pay attention to whether the fabric will slip.Splashing and softening can be done at the same time to make the fabric waterproof and soft,but the softener will affect the degree of splashing.
③ Resin setting is mainly used to fix the yarn and make the fabric feel stiff.Some resins contain formaldehyde,so we should pay attention to their selection; Watering and resin setting can be done at the same time, and the resin can promote the watering agent.
④ Flame retardant setting plays an auxiliary role in the flame retardant function of the fabric.Flame retardant can also be water splashed at the same time,but special attention should be paid to the selection of water splashing agent,otherwise it will have a great impact on the flame retardant effect.
⑤ Antistatic setting allows the fabric to have antistatic function,which can be done at the same time as water splashing setting,but it has an impact on the water splashing effect.
⑥ Moisture absorption and perspiration shaping allows the fabric to quickly absorb sweat,making sportswear more comfortable.You can't do it at the same time as splashing water.
⑦ Antibacterial and deodorization processing is mainly to make the fabric have antibacterial function,which is mainly used in medical facilities.
⑧ Super water sprinkling shaping (also known as Teflon treatment):it has better waterproof and dustproof effect than ordinary water sprinkling shaping,and also has oil prevention function.Generally speaking, guests will ask to pass the DuPont tag.
A.Effect of calendering
① Soft feel.
② Make the calendering surface of the fabric more flat and narrow the gap between the fabric fibers to prevent the cashmere effect or achieve higher water pressure during gluing.
③ Make the glued surface more smooth and beautiful.
④ The calendered surface has a bright effect.
B.The three elements of calendering are temperature, speed and pressure.Calendering will change the color of the fabric.
C.Gluing can make the fabric waterproof,lint proof,wind proof and other functions.It also has the functions of fixing the yarn,increasing the appearance and thickening the hand feel of the fabric,so as to make the fabric more valuable.
D.There are acrylic (also known as AC,PA),PU glue, moisture permeable and breathable glue,which can be processed into transparent glue,white glue, silver glue,color glue, pearlescent glue,Youli glue and so on. Corresponding raw materials can also be added to the glue to make it anti ultraviolet,flame retardant, anti yellowing and so on.
E.Pay attention to the control of water pressure, hand feel (thickness,soft and hard),glue uniformity, glue peeling strength,water washing resistance (whitening),whiteness,etc.Also pay attention to the rubber particles,rubber marks and dryness on the rubber surface.Pay attention to the effect of sticking water stop tape (PVC strip / PU strip) on the rubber surface.
11.Fit PVC.
Pay attention to the thickness,feel,peel strength and quality of the adhesive surface of the fitting.
12.Other processing.
There are dry Pu (release paper), composite, PU leather and so on.
13.Water washing.
Some cotton cloth, N / C and T / C have to go through water washing process. Water washing is divided into ordinary water washing, soft water washing and enzyme water washing (removing the floating wool on the surface of cotton cloth).
14.Completion inspection
Inspect the quality of finished products, classify the grades, and pack them for shipment.Generally, inspection records and matching difference tables shall be made.Any problems should be fed back to the salesman in time to communicate with the customer in time.
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