Process And Matters Needing Attention In Production Of Polyester Fleece

< p > with the continuous development of society, all kinds of synthetic fabrics have come out one after another.

< a href= "http://www.91se91.com/news/index_c.asp >" /a "is a kind of knitted fabric. It is a knitted fabric of small Yuanbao, woven into a large circular knitting machine, dyed by a large circular knitting machine, dyed first and then processed by a variety of complex finishing processes, such as napping, combing, shearing, and crunking. The fabric is pulled out on the front side, and it is dense and fluffy, but it is not easy to lose hair and pilling. It has a thin and thin surface. It has short fluff and clear texture and fluffy elasticity.

Its ingredients are generally polyester, soft and the first choice for winter.

The cashmere can also be combined with all fabrics to make the effect of protecting the cold better.

< a href= "http://www.91se91.com/news/index_f.asp" > fabric > /a > ingredients are generally polyester.

Due to the low moisture absorption and high crystallinity of polyester, it is easy to generate static electricity, and is oily and easy to stain. Therefore, antistatic and antifouling treatment is necessary.

Through screening of good compatibility, different types of auxiliaries, and strict control of temperature, time and pH, we can achieve better effect of three prevention. In order to meet market demand, we must develop low cost and high efficiency technology.

Based on our knowledge and practical experience in factories, drawing on the technological design of similar manufacturers, and connecting with the development situation of dyeing and finishing industry, the equipment designed with this design may be a bit out of date. But it is important to ensure product quality to meet market demand. Of course, we should introduce a small amount of advanced foreign equipment, and pay attention to energy conservation and pollution prevention, and strive to be practical, safe, applicable and fast.

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< p > traditional process flow: billet inspection - soft precondition - finishing - drying - bristling - combing - shearing - high temperature gas steam granule (finishing) - finished product inspection < /p >

< p > the improved technology is mainly embodied in water proofing, antifouling, oil proofing and flame retardant finishing. Through screening of good compatibility, different types of auxiliaries, and strict control of temperature, time and pH, a better three prevention effect can be obtained.

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< p > to remove oil stains, antistatic agents and oil stains when weaving.

Through scouring and bleaching, on the one hand, we should give full play to the fine quality of fibers, and more importantly, meet the requirements of a series of subsequent processes such as printing and dyeing, finishing and so on on the whiteness, moisture absorption and permeability of fabrics.

The addition of penetrant is to increase the penetration effect of fabrics, so as to avoid adverse effects on printing and dyeing.

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< p > process prescription / (g/L) < /p >

< p > caustic soda /% (OWF) 4-6 < /p >

< p > whitening agent CPS-D/% (OWF) 0.25 < /p >

< p > chelating dispersant DME-101 1.5 < /p >

< p > degreasing agent 1 < /p >

< p > technological conditions < /p >

< p > heating rate: 2 C /min < /p >

< p > scouring temperature: 130 C < /p >

< p > holding time: 30min < /p >

< p > bath ratio: 1:10 < /p >

< p > the material of the fabric is hollow, which reduces the surface finish of the fiber, and the surface hydrolysis improves the hydrophilicity of the fabric.

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< p > chelating dispersant DME-101 is anionic. It has excellent acid resistance, oxidant resistance and resistance to reduction, and has good stability and dispersibility.

It can chelate calcium, magnesium and iron ions in water and chelate, so it can soften water.

It has a good promoting effect on dyeing and finishing.

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< p > drying is needed after refining so as to ensure normal operation of the next process < /p >

< p > note: during the drying process, we should pay attention to the loose condition of the cloth, avoid the cloth difficult to expand and skew and run, resulting in oil pollution, weft deviation or damage.

Check the machine regularly to prevent warping, wrinkling and breakage < /p >.

< p > dyeing process: cloth inlet to water wash (two times), dyed to wash (two times) to soaping to wash, and to go out of cylinder < /p >.

< p > dye uptake decreased, color change < /p >

< p > 1. the pH value of dye solution fluctuated < /p >.

< p > 2. dye vat leaked < /p >

< p > 1. controlling the appropriate pH value < /p >.

< p > 2., select pH value insensitive dye < /p >

< p > 3. dye vat check < /p >

< p > chicken feet and wrinkles < /p >.

< p > 1. preprocessing is not proper > < /p >.

< p > 2. bath is too small, running poorly, loading too much < /p >

< p > 3. cooling too fast < /p >.

< p > 4. nozzle diameter is too small < /p >.

< p > 1. before dyeing, strengthen pre-treatment < /p >

< p > 2. increase bath ratio and reduce load < /p >

< p > 3. slow cooling < /p >

< p > 4. adjusting nozzle < /p >

< p > 5. with a softening agent < /p >.

< p > cloth and hair, poor levelness, streak and stains < /p >

< p > 1., the dyeing speed is too fast, and the process is not good. < /p >

< p > 2. improper use of auxiliary dyes < /p >

< p > 3., desizing is not uniform, floating color is not washed (< /p >).

< p > 4., insufficient jet power and unstable flow. < /p >

< p > 5. fabric accumulation or floating < /p >

< p > 1. strictly control process < /p >

< p > 2.. Choose good dyes and auxiliaries < /p >.

< p > 3. strengthening desizing and cleaning < /p >

< p > 4. increase the injection force, control the liquid volume, and strengthen the dye circulation {page_break} < /p >

< p > softness and predetermined type < /p >

< p > prescription (g/L): KLM-B pilling agent 40-60 < /p >

< p > WS-2 softener 5-50 < /p >

< p > normal temperature, one dip and one rolling > /p >

< p > vehicle speed (m/min) 25-30 < /p >

< p > setting temperature (c) 170-180 < /p >

< p > KLM-B hair raising agent is provided by Changshu Huashun Auxiliaries Factory. WS-2 softener is provided by Changshu Oriental auxiliary Research Institute < /p >

< p > fuzz - combing - shearing less than /p >

< p > fuzz, the force of the friction between the front and back of the machine makes the middle and long fibers of the fabric stand up as far as possible, so that the superfluous fibers of the long fibers in the fabric turn into different fuzz. < /p >

< p > comb also uses the mechanical force of the machine to straighten the fabric surface and comb it in the same direction, so that the wool surface of the fabric is consistent. < /p >

< p > shearing force removes the excess fluff from the fabric surface by mechanical force to make the cloth smooth and velvet. < /p >

< p > shake particle < /p >.

< p > put the shred fabric into a vertical roller machine, steamed at high temperature and high pressure, so that the fleece is steamed into granular shape, that is, the granule is < /p >.

< p > technological conditions and matters needing attention < /p >

< p > when the temperature of the rocking grain is not lower than the required temperature, the temperature should be kept for ten minutes, the speed is 10rad, and the temperature can be removed at room temperature. Otherwise, wrinkles will easily occur. < /p >

< p > < strong > three protection and flame retardant finishing < /strong > < /p >

< p > < strong > additive selection < /strong > < /p >

< p > the compatibility between auxiliaries should be considered.

The compatibility of OLEOPHOBOL SL-A01, antistatic agent AMT and flame retardant FR-4 is very good.

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< p > working fluid formulation (g/L) < /p >

< p > OLEOPHOBOL SL-A01 50-70 < /p >

< p > antistatic agent AMT 40-80 < /p >

< p > flame retardant FR-4 140-160 < /p >

< p > sizing process after heating: speed 12-18m/min; < /p >

< p > setting temperature: 170-190 C < /p >

< p > OLEOPHOBOL SL-A01 is provided by DuPont, USA. The antistatic agent AMT is provided by Shanghai Fubin Fine Chemical Co., Ltd., and the flame retardant FR-4 is provided by Changzhou Unicom auxiliary plant.

The product is tested by a national testing institution: < /p >

< p > < strong > oil prevention mechanism < /strong > < /p >

< p > after water repellent and oil repellent finishing, the surface free energy decreases, making the liquid contact angle increase on its surface, preventing liquid dirt from inhaling the yarn spontaneously and requiring higher pressure to enter.

The fabric has the ability to resist liquid stain. < /p >

< p > Application of anti oil finishing agent: polyester is oiliness, so it is easy to stain, and it is not easy to remove oil and contaminate when washing.

Therefore, it is necessary to prevent oil pollution treatment. Oil proofing agents can give fabrics no stain, and mainly rely on improving the hydrophilicity and antistatic properties of fabrics. The mechanism is similar to antistatic.

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< p > < strong > the influence of pH value < /strong > < /p >

< p > the ionic character of polyester fiber in bath liquid is weak anionic, with the increase of pH value, anionic strength is strengthened.

Waterproof and oil proof should be under acidic conditions, so the working fluid is relatively stable.

The best pH range is 3-5 < /p >

< p > < strong > the influence of temperature < /strong > < /p >

< p > setting temperature is controlled at 170-190 C.

If the temperature is too low, the admixture will not permeate, which will not reach the effect of three checks. If the temperature is too high, the antistatic effect will be affected. < /p >

< p > < strong > measures to produce adverse results < /strong > < /p >

< p > poor waterproof performance, poor durability, waterproofing and streak formation, great changes in color and light.

In view of the above problems, through many experiments, we find the causes of the problems and propose measures.

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< p > (a) choose suitable waterproofing agent for processing fleece, and replenish the new working fluid as far as possible during processing.

We should strengthen the temperature management of the processing cloth, pay attention to the compatibility of the auxiliaries, and use the working fluid as far as possible in the 24h.

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< p > (b) waterproof and oil proof should be under acidic conditions, so the working fluid is relatively stable.

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< p > < strong > finished product inspection < /strong > < /p >.

< p > < strong > technological process < /strong > < /p >

< p > cloth check > fold cloth > grade > repair wash wash > cut open Zero Zero > pack > /p >

< p > we should pay attention to it: repairing and washing < /p >.

< p > fabric, folding cloth, grading, some defects have been reduced, but after repair, weaving and washing, it does not affect the quality of fabric, but also does not cost much.

It not only reduces the defects of cloth surface, but also improves the quality of cloth surface and improves the use value.

After washing, the cloth must be folded and stacked as required.

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