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Reactive dyeing of cotton knitted fabric of differential cylinder control

admin — Tue, 12 Jul 2011 13:33:36 +0000

Characteristics of pure cotton knitted fabric has decided they like woven fabrics of continuous dyeing, dyeing process is generally intermittent, that is, a cylinder, a cylinder production. Color difference resulting between the cylinder and cylinder (with the same recipe dye with a fabric) that cylinder differential is a persistent problem in dyeing and finishing industry. Factors affecting differential cylinder more, are rather complicated, fundamentally overcome cylinder problem impossible. However carefully analysed and controlled, the cylinder is possible within the scope of differences to a minimum. 1. quality control of grey cloth weaving quality stability is an important factor in producing cylinder differential. Natural fiber ingredients for cellulose fibers, water, natural impurity (ASH), these components will vary according to the natural environment, at the same time in the production process are also mixed with some debris, such as weaving finishes. In different raw yarn, or fabric production enterprises, these natural impurity doping not only differences in the content, and its physico-chemical properties are different, sometimes even the same yarn as raw materials, fabrics, there are also some differences on the dyeing property. Effective solution in addition to strict quality control of the weaving process, from raw cotton began to weave finish is, establishing a comprehensive traceability system for grey fabric and dyeing factory of weaving enterprise has the obligation to provide relevant data and information , to facilitate the dye factory distribution tank by reasonable or timely adjustment formula, and thus achieve the purpose of reducing cylinder differential. 2. quality control in production of semi-products due to the inconsistent quality of semi-products and cylinder differential of a considerable proportion. Semi-products quality 3 main factors: the capillary effect, pH value, whiteness. In the cylinder on the poor performance is due to thecapillary effect, cause fabric to dye dyeing ability of different because of different pH values, causing dye dyeing of different initial; due to differences in brightness, resulting in varying levels of color, crisp. So paying attention to the process before, unified pretreatment process parameters, precise control of additive dosage of each cylinder, before reunification process time, uniform dyeing machine of the operation parameters, to provide uniform stability for dyeing of semi-products, this is the important part of controlled differential cylinder. In addition, by raising the level of equipment, such as the actual realization of pretreatment and dyeing process on the device online detection (such as real-time precise detection of the pH value) and monitoring will provide an effective technical means for reducing cylinder differential. 3. the dyes and auxiliaries quality of dyes, additives on the stability of cylinder difference has a direct impact, on the selection and use of dyes, auxiliaries should note the following several points: a. batch quality and stability. Contrast dye color color difference is more than 4.5; batch of additive concentration difference in content between 0.5% per cent. B. choose excellent compatibility of dyes for dyeing of color combination. Good compatibility in several dyes combination dyeing rate of dyeing curve basically the same, different dyeing time periods only level without hue on shades of a color difference. C. low liquor ratio-dependent. Bath ratio dependence of meaning on the premise of dye amount unchanged, with bath ratio of increase or decrease, shade differences only in shades of different, and no apparent hue differences on. How to measure those complex or combination of the so-called quality of color dyes, such as some black reactive dyes. Experience shows that color shade shades of differences in the production control than to hue on the deviation control much easier. D. excellent reproducibility of dyes, goodreproducibility of dyestuffs cylinder differential will reduce the risk. E. fluctuations of pH value and dyeing and salt amount less wide adaptation range. As in the production process in the dye bath pH value of precise control and precise injection of salt and alkali additive, in the actual production process is difficult. In selecting these factors affect the small dye in dyeing process will better meet the needs of actual production. 4. poor process control the stability of cylinder is in control of other quality problems on the basis of a, such as flower color, color, and so on. Without these quality assurance, control of cylinder differential will lose its significance. Measuring technique is stable or not, dyeing success rate is the more critical to the quality of the pointer. Dyeing the success rate is above 90%, this process is a stable and mature process; in 80% per cent success rate, this process also needs to be improved; a success rate of less than 60%, this process there is a technical defect, needed improvement. A stable process should have the following characteristics: a. process operation of strong, in line with actual production conditions of the factory, workers action. When there are many tasks in the development process, often developed under laboratory conditions, no considerations or comprehensive enough to actual production conditions, so as to create practical difficulties. B. to have a certain amount of redundancy, mature and stable process not because of quality problems caused by a small mistake. Because the present conditions of dyeing and finishing industry production and the level of professionalism of workers, it is difficult to meet the operational requirements of too fine. C. dyeing of the same formula a success rate of more than 90%. 5. the general operation of the standard uniform dyeing factory process: tibetaners send send kind ¡ú laboratory sampling ¡ú confirm ¡ú confirm ¡ú color ¡ú plan cylinder production in dyeing workshop. Hereit should be noted is that tibetaners confirm color are generally considered to be the final color of the product, and sending the tibetaner the laboratory sampling colors shade more often than not the final product. Because we are not able to completely mimic the process of finishing and finishing and processing on the condition of some of the technology fabric shade of color have a greater impact, such as amplitude and shape drawing machine type of temperature , use softener (cationic softening agent, organic silicon softening agent can cause larger shade changes). This is caused when dyeing workshop production of the color standard according to tibetaner’s end-product requirements operation, shade and the actual end product and the tibetaner requires the existence of large deviations. Therefore, require laboratory shade dyeing stages of standards should be provided for dyeing workshop. When a tibetaner is the same color product production time interval is long, laboratories should be complex samples (that is, proof), found a large deviation correction in a timely manner. 6. production of shade when deviations within the scope of control in the client allows the e, production should be a unified control + e, or-e in deviation ¡À e If both (mutually complementary coloured light deviation), most likely due to cylinder differential is too large and was rejected by the tibetaner , while e is still within the range of tibetaner requirements. In addition, dyeingProduction of color standards is to ensure uniformity and uniqueness. There are multiple standards coexist, who really controlled differential cylinder extremely unfavorable. Because sample standard will change with time and space and have some changes, so the color sample update necessary. With the development of computer technology, the use of computers for digital management of colour difference, which can effectively solve the above problem, this is one of the enterprise development direction of modern management. 7. the right shade and color mixing methods as standard deviation and color blending in the machine is in the process of dyeing operations frequently. The factory by used of toners method the does not same, but a common of principles is: Dang shade has partial red, and partial deep Shi, should be used SOAP wash Hou toners method, because experience indicates that, red reactive dyes at any time between of extended will has a continued of Shang dye process , shade performance Shang will increasingly red; Dang shade partial yellow or partial blue Shi, should be used “half feet water” toners method, this species way will more shortcut effective; Dang shade overall partial shallow Shi, should be used by proportion “full feet water” Commission addition. 8. correct reasonable cylinder cylinder distribution methods are also effective methods to reduce cylinder differential, in principle, the same color equipped cylinder number of the less the better. When a color distribution in 2 tanks and more than 2-cylinder, the cylinder number, first the 1th cylinders, as in the original process implementation, such as the 1th cylinder does not match the shade, after adjusting the formula, then 2nd tank in dyeing; and then the 1th cylinder press 2nd tank shade for color handling, later dyed were conducted by the 2nd formula. Course in distribution cylinder number only when they are 2-cylinder, can also stain, and color mixing process at. Worthy of note is, 1th cylinder distribution of cylinder capacity should be as small as possible, after all color matching in the dyeing process is risky course of action, should, in principle, within the scope of the risk to a minimum. In addition, within the same dye dyeing of the same color, consistent volume of capacity at a time as possible, for reducing differential cylinder has a larger benefit. 9. equipment and operation of the stability of dyeing machines have a dyeing tank type is one of the important factors of the difference.In the plan when the cylinder, as far as possible be the same species within the same color in dyeing machine of the same type of production, to a great extent reduce the generation of cylinder differential. This, of course subject to actual production conditions of dyeing factory. If you can do operators of fixed, the so-called three-fixed (fixed personnel, fixed machines, fixed process) that will be more conducive to the operatives the accumulation of experience, will naturally reduce the number of actions at the same time human error. 10. staff professional qualities of poor site management experience will undoubtedly reduce staining cylinder is important that all dyeing factory there is a consensus, so key personnel in key positions of high professional quality requirements, should have the operational capacity of the combination of theory and practice. In short, cylinder differential factors are, the control is a complex process, simply return it to technology or management factors are objective enough. How to control, each factory has its own set of experiences. In the actual production, only under the joint efforts of the relevant technical and management personnel, cylinder differential incidence will be reduced. (AB group/Zhang Xiuqiang, Jiangsu)

Rolling cotton

admin — Mon, 11 Jul 2011 07:33:49 +0000

Produced by British-American tobacco company cigarette draw the map of crimped rolling cotton, was an important task ahead of spinning and weaving. After the cotton grown after picking, drying, rolling flowers go to seed, crude bomb, spinning, dyeing, weaving and many processes, can do clothing system. Smoke produced by British-American tobacco company in 1905 painting depicts the crimped map is the scene of late Qing dynasty women rolling cotton. In China is not made of cotton. Before the song, civilians wearing Pouilly, usually linen fabric, rarely Royal high ranking official to wear cotton clothes. At that time, the winter people wore silk in the South, North of fur. Until the late Song dynasty, cotton, cotton continued to be regarded as valuable items. After the Song dynasty, began planting cotton in certain areas of Fujian and Guangdong. Later, cotton seed transmission to Zhejiang, Jiangxi, Hunan and other places. When the Yuan dynasty, it was also introduced from Turfan in Xinjiang cotton seed in Shaanxi trial. Cotton really large-scale cultivation began in the Ming dynasty in China. The founding emperor of the Ming dynasty Zhu Yuanzhang’s has seen the economic value of cotton, to promote cotton planting, he promulgated a series of decrees. Cotton as a unique feature of cash crops, was also respected by the men of letters, was painted in red and Green by some painter as a floral displays. Now, a site on the possession of the Palace Museum in Beijing Sun Ai in the Ming dynasty of the kapok figure painting there are outstanding in the Ming dynasty painter Shen Zhou in a poem entitled: “when the nun with Huang Rui, Mian contain deep blue Bell. Grass keep clothing, long the people who this heart. “Cotton into poet art reflects this component in people’s minds. To the middle of the Ming dynasty, and weaving of cotton production process have reached a high level. People are equal, regardless of the North and South, are starting to cotton garments. The coat was warm, textile complex process it is very hard. Crimped-only one, has made a lot of people “severe lumbago”. Zhao Rukuo in the various wrote in the journal of the Southern Song dynasty: after the acquisition of cotton, “whichever antler flocculation, iron shafts ran to the seed, that is, hand mashed, spinning cloth”. To Wang Zhen in the Yuan dynasty the of the book, the “iron shaft grinding” has become a mix, that is, a treadmill, cottonseed, with great progress than before. It is a pity, since Yuan, the treadmill is no new development and changes. The Qing dynasty, is still used by people to seed this treadmill, work day, low acid leg pain, even the body is difficult to direct. With the times and social progress, and weaving of cotton production technological level continues to increase. Today, rolling and cotton, and many other modern machines are spinning and weaving processes are completed, clumsy hand-made mechanical gradually fade out people’s eyes.

Morphology and structure, ultra-microstructure of naturally colored cotton fiber structure and chemical composition

admin — Fri, 08 Jul 2011 19:35:31 +0000

With an optical microscope, transmission electron microscopic observation of naturally colored cotton fiber, its structure is similar to white cotton, but large cell and secondary cell wall thin, pigment are mainly distributed in secondary cell walls in fiber. Green cotton fiber coaxial osmium in the secondary cell wall layers, white cotton Brown cotton and there is no; green cotton coaxial osmium and wax, pigment related. Element analysis shows that only 85%~90% per cent of its fiber content; green cotton remaining components mainly for wax, content about 6~13 times that of white cotton. Colored cotton are approximately white cotton 1.4~1.6 ash content, protein content of about 1.75 per cent times the white cotton. Plasma spectroscopy shows that majority of colored cotton in trace metal content of less than white cotton, but copper and iron content above a white cotton.

Prevention and treatment of cotton pests in winter

admin — Fri, 01 Jul 2011 17:33:47 +0000

Cleaning garden pink bollworm in cotton, red spider, aphids, plant bug, pathogen of anthracnose fungus, Rhizoctonia, etc, can be left on the cotton fields of dry twigs, fallen leaves, black Bell, as well as on weeds in winter. Complete removal of dry twigs, leaves, bad Boll, eradication of Dennai and surrounded by weeds, be effective in eradication of overwintering pests. Clearing time of bury and avoid stacked near the field. Deep irrigation of cotton bollworm, Tigers, cutworm spodoptera litura and other winter in soils, deep irrigation measures may be used to kill. This significant effect, mortality can be up to more than 90% of cotton bollworm. Deep depth 30-40 cm, turn to below topsoil, subsoil and turn to the above. Winter irrigation should be carried out in 39 days, to fight through irrigation. 80-120 cubic metres of irrigation quantity per Mu in General, Tian Ying clay to fight some more, with furrow irrigation as well, bogey free flooding. Chemical fumigation anthracnose, angular leaf spot pathogen and pink bollworm, red rot and other diseases and pests, can be attached to the seed inside and outside in winter. Types of warehouse storage can be sealed, 32-37 grams per cubic metres of methane bromide used in space fumigation killed, closed 3 days may kill 98% of pink bollworm and cotton seed in some pathogenic bacteria. Main pink bollworm larvae hide in cotton cotton storage warehouse walls of cracks and voids in the winter of shipping and storage tools, therefore, may be in storage before the cotton on the inside walls of the warehouse with lime slurry spray, closing the gap, and then use the 50% dichlorvos emulsion twice liquid, spray on the walls of the ground, put cotton, sealing Windows and doors, poison pink bollworm.

How to overcome the dark-coloured polyester cotton blended fabrics dyed white problems

admin — Wed, 22 Jun 2011 08:40:47 +0000

Before the same when dealing with the same grey cloth dyeing, dyed dark, such as when dark green, Navy Blue and black, tend to have a white spot, especially when applying the activity of dispersing/two-bath dyeing, white spots more obvious. There are two white spots may: (1) size not divisible, and (2) present on raw cotton cotton died. The so-called “death of cotton”, namely cotton bolls in the process of growth resulting from hypoplasia of stiff cotton. Strictly speaking, death is not dyeing with reactive dyes of cotton, and direct dye dyeing part die cotton you can rely on the van der Waals forces. Therefore, the former than the latter marked with white dots. If such defects, especially after heat setting, more difficult to repair. To prevent white spot, before the first of all, should be strengthened. Because both the removal of slurry on the fabric, or on the removal of raw cotton to die cotton, fabric pretreatment has very close relations. Following is the formulation and process of polyester-cotton fabric pretreatment conditions. Prescription/g ¡¤ L-1 (1) (2) of NaOH (flakes) T1~21~2H2O2 10~154~6Na2CO32~32~3 permeability agents (30%) 3~53~5 YX282~3-188-3~5 process of scouring enzyme scouring agent: prescription (1) charging at room temperature, to 1.5 ¡æ/min heating to 100 ¡ã c, heat scouring 60~90min fully washed, dyed. 1:10 bath ratio (to the same below). Recipe (1) suitable for desizing. Prescription (2) feeding at room temperature, a warming of 1 ¡ã c/min to 100 ¡æ, scouring 60min insulation, cooling to 85 ¡ã c, temperature washing once new bath, joining Na2S2O4 of 0.3g/L processing 15min, removal of residue on fabrics of H2O2 and , finally, fully washed, dyed. Prescription (2) suitable for removing of dead cotton. With the above two after treatment, dispersion/fabrics made of dyed polyester or direct one-bath dyeing. Practice has proven that through this pre-treatment, 19.4texx19.4tex268 root/10cmx268 root 29texx29tex425 root/10cmx228 root/10cm and/10cm plain cotton twill fabric conditioning rate can reach 11.5%~13.0%, capillary effect can also be reached 10.5~12cm/30min, whiteness value of around 70, dyeing of full compliance with requirements. Dyeing and finishing of cotton fabrics on dyeing Navy Blue and black, basically no obvious white spots. But in production also need to note the following several points: (1), H2O2 can remove part of the slurry and dead wool, but the amount must be appropriate. Such as excessive, combined with the raw cotton cotton content and not be seen dead on, tends to make fabric hole (needle), and even makes the strong reduction in raw cotton. (2), and death of cotton fabric sizing agent removal, rely mainly on the role of alkaline agents and surfactants. In order to make the pharmaceutical treatment bath play a role, you should add penetrant t. Not only can it help improve the dyeing defects caused by the death of cotton, and penetration rapidly, especially suitable for high count and high density fabric and cotton textiles with poor quality. (3), select Yin/non-ionic scouring agent complex. It can effectively emulsification, dispersion from both impurities, dirt and fibers from the oligomer, and inhibition of these substances can also stain again. (4), pretreatment baths must join in soda, water softener, detergent effects. In determining when dyeing recipe and process, if the requirements for colour fastness to high, preferably dispersing/two-bath dyeing of reactive dyes. In order to overcome the reactive dyes for cotton died in cotton and response capacity of defect-free, you can in the process of reactive dyeing process of SOAP-boiling, add the amount of shade similar to the direct dye, because it after pretreatment of die of dyeing of cotton there. In implementing the technology required attention: (1), SOAP boiling time to extend 10min of reactive dyes, direct dyes to ensure joined fully in contact with the death of unreacted cotton, increase the rate of dyeing. (2), due to join the direct dye, overall colour fastness to reduce, so thoroughly after cleaning of fabrics, also required for the purposes of Yang charged fixing agent processing. In fact, in order to further improve the fastness of reactive dyes, especially wet rubbing fastness, at present the enterprise are extensive use of additives such as fixing agent for processing. (3), if the dyeing of fabric softener were required after treatment, it is recommended that solid color, soft finish combined. Because fixing most of Yang charged, softeners or Yang of load, or non-ionic, use does not affect their respective results.

On cotton linter and related knowledge of cottonseed oil

admin — Wed, 22 Jun 2011 03:33:51 +0000

On the issue of cotton linter different varieties of cotton linter content different, some cotton varieties on cottonseed attachment have a cotton linter, while others don’t, is the photon. Attachment of short fiber varieties, some short fiber, less fluff. General produce a variety of short fiber tons of seed cotton lint production 12-13% of short fibre, where: a Linter accounted for about 12-13% of 10%; two Linter accounted for about 12-13% becomes prohibitive; three Linter accounted for about 12-13% of 20-30%; inferior cottonseed easily damaged in the process, Linter is extremely low. Short fiber prices with lint prices fluctuate, seedless cotton prices have rebounded this year, short fiber prices also rose recently: a short fiber prices around $ 3200-3500 per ton; two short fiber prices around $ 2200-2500 per ton; three short fiber prices around $ 2000-2300 per ton; short fibre production is not isolated, is essential for lint production facilities. A rolling spent factory of composition: seed cotton inspection level acquisition institutions facilities goods Taiwan; factory workshop 300-500 square Qing spent machine 2 Taiwan 120 tablets cotton gin price about 5.15 million Yuan around 3-6 Taiwan stripped short cashmere machine price about 1-1.50,000 yuan around playing Charter price about 150,000 yuan around a dust device price about 120,000 yuan around electrical device fire facilities and security device in short, built a rolling spent factory required 1 million Yuan around, if season good also can, if bad, yard eat does not full, benefit does not good. Many individual plant distribution of lint, yard of this irregular, is temporary, will be perfect, perfect, otherwise produced by lint, Linter is mixed, affecting textile quality, high prices naturally will not.

Agricultural Development Bank Headquarters has issued a loan program to purchase development of a notice of cotton textiles

admin — Sun, 14 Feb 2010 09:38:54 +0000

To perform effectively to ensure their basic duty to the purchase of grain and cotton for the acquisition of credit financing and administration is not a major problem & # xe8; me, and strengthen you Liangmian this kind of quasi-policy loans by buying grain and cotton loans, management, and the Agricultural Development Bank Head Office D recently the “Regulations on the theme” China Agricultural Development Bank of grain purchase plan loan and China Agricultural Development Bank of plan the purchase of cotton ready “notice” (the “Notice”). “Instructions to understand” is needed at all levels, the quasi-political line of the size of the loan. This step, quasi-politics are about the extent of credit based business: first, self-supporting food businesses on the purchase price of wheat, rice, maize, soybeans, corn and four kinds of personal loans to supplement food tent, 2 is to support the grain companies to buy their own rape prices, peanut varieties released two loans fü , r purchase of oil, three acquisitions in support of loan cotton Cotton Cotton award. “Notice”, stressed that the administration of the quasi-loans and other policies, the management of commercial loans. In prepared to take appropriate measures to mitigate risks to ensure the existence of a reasonable risk of cr & # xe9; said. TOE is in operation, the orientation of policy loans oils make a clear distinction between the actual situation. The provision of funds, quasi-loans policy, funds and loan programs as a priority the assurance that the acquisitions smoothly. It is reported that after the opening Liangmian you buy the market, because of the different types of acquired companies operated independently self-financing, business losses due to credit risk from the Agricultural Development Bank of himself. To this end, the Agricultural Development Bank has Liangmian buy loans in business management. However, the implementation of the location, ceremonial support for the Agricultural Development Bank of the State Council, provided, ales and buyers of heavy cotton, especially in grain and cotton market-oriented reforms, the credit policy of the Bank of d & ; # xe9; agricultural development Liangmian you buy a very long period must have the implementation of the national macro-control based on policies for protecting the interests of farmers to ensure that no problems Buy the principle of operation and management of treatment may not be supplemented in accordance with the operation of commercial loans. Therefore, the Agricultural Development Bank open grain and market conditions, the supply of cotton to ensure the proper purchase, with corn and cotton, there is no regional “Mailiang, Sales Cotton will be difficult given “, and to support the acquisition of companies Liangmian ing the supply of loans that are treated as quasi-policy based on operational lending is an objective necessity and also fulfill the basic functions of the Agricultural Development Bank of necessity. Read suiteCatégorie: See Standard category Comments