Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
  • D06B23/00—Component parts, details, or accessories of apparatus or machines, specially adapted for the treating of textile materials, not restricted to a particular kind of apparatus, provided for in groups D06B1/00 - D06B21/00
  • D06B23/24—Means for regulating the amount of treating material picked up by the textile material during its treatment
  • D06B23/26—Means for regulating the amount of treating material picked up by the textile material during its treatment in response to a test conducted on the textile material

Definitions

• the present invention relates to a method for the continuous, uniform application of aqueous dyeing liquors to water-wet, textile webs, their moisture content in the longitudinal and transverse directions to the goods running according to the principle of microwave absorption by an arrangement of more than two measuring points across the web width before the fleet application and is measured continuously and without contact by another measuring arrangement with the same equipment as before after the fleet order.
• wet-on-wet process or “wet-on-wet” process has meanwhile become known as a series of dyeing methods in which the web of material pre-padded in a first padding process with dyeing liquor or priming liquor is in a second padding process a chemical, fixative or developing liquor is applied. Two padding liquors of different compositions are thus applied one after the other.
• the object of the present invention is now to dewater a wet web continuously, without drying it, evenly to a desired or required residual moisture content and to uniformly apply a dyeing liquor to the then evenly moist web.
• the primary aim of the new process is to make a drying process after pretreatment of the web superfluous.
• This object is achieved according to the invention by uniformly partially dewatering the wet web from a previous wet treatment to a certain residual moisture content, continuously measuring the set residual moisture lengthways and transversely on the web and using the measured values obtained to control the dewatering performance at the corresponding points on the web that an aqueous dyeing liquor is then applied to the web, which has been partially dewatered without intermediate drying, the amount of liquor applied here now being proportioned as a function of the measured values of the residual moisture content from the first treatment step, this also being carried out on the web after the application has been carried out under the same conditions as before measures and the measured values of the total moisture content obtained in cooperation with the residual moisture values from the first treatment step are also used to control the liquor application.
• a device according to DE-GM 76 38 683 As an apparatus arrangement for measuring the tissue moisture in the high humidity range, which is used to carry out the control functions according to the invention, i.e. continuous monitoring (continuous measurement and registration) and independent control of the drainage (first step) or the fleet order (second step) in the direction of travel and across the width of the goods , capable, a device according to DE-GM 76 38 683 has proven itself, which also describes the mechanical details. Said measurement takes place in the course of the goods run immediately after leaving a dewatering plant or behind a discharge device for the fleet on the web of goods being guided at a constant speed by means of a non-contact method based on microwave absorption.
• the dewatering performance or the quantities of the liquor application are individually controlled by several, separately adjustable sections corresponding to the measuring points over the width of the dewatering plant or fleet application device with respect to a predetermined dewatering performance or fleet application quantity.
• the desired residual moisture content or the intended absorption of the liquor is expediently programmed into a limit switch.
• the moving textile goods which are in the moist state, are subjected to a continuous moisture measurement, the measurement results of which are registered and used for low-inertia control by these measuring points and used with corresponding devices, through which the drainage performance or the amount of liquor to be applied or applied and thus ultimately the moisture content of the textile goods is kept at the desired value over the entire width and length of the textile web.
• the web which is wet or moist from the pretreatment, is brought to a very specific residual moisture content in a very uniformly operating dewatering plant and is continuously dewatered in the indicated way.
• this will be done in accordance with the respective requirements to values between 35 and 75% of the dry weight of the paint, preferably to 45 to 65% by weight of residual moisture. It is often advisable to thoroughly wet the goods - especially if they have been lying there for a long time and the moisture has been distributed unevenly - through a passage through water and only then to subject the measures to drainage.
• the residual moisture currently present on the textile web is measured with the help of the microwave measuring device already explained and - depending on the values determined here and in accordance with the intended or required amount of liquor application in the subsequent second treatment step - the desired degree of residual moisture in accordance with the method specified Guide value set by regulating the drainage organs. Usually a foulard is used for these purposes. The regulation then takes place via the roller pressure.
• the amount of water remaining in the web is important for the subsequent fleet order.
• a concentrated dye liquor is then padded onto this now evenly moist web of material with a precisely defined moisture content in the run-up to the actual application phase.
• This padding process is carried out in such a way that the total moisture content of the paint is between 50 and 300%, preferably 60 to 120%, of the dry weight of the goods.
• the ink liquor application carried out in this way is also measured and precisely set within the specified limit values. This regulation takes place in such a way that the application unit is controlled on the basis of the moisture remaining from the dewatering and the amount of dye liquor that must necessarily be applied by forming the difference from the measured values obtained and specifying a difference.
• measurements are carried out again after the application of the dye liquor and the adjustment is carried out by re-aligning with the target value, so that an even liquor application results.
• measuring and controlling the drainage creates the prerequisite for an even fleet order, which has already failed due to this premise in previous attempts.
• the new process has now made it possible to switch off color flow, liquor dilution and the like.
• all dye classes can be applied to textile webs of all fiber materials suitable for continuous operation. They are then fixed or developed according to the usual working methods for the products concerned, e.g. B. by simple storage at room temperature or vapors or hot air treatment and other methods. The claimed method is therefore not subject to any reservations in this regard.
• the order fleets can all the necessary tools such.
• a cotton fabric that is still wet from previous washing processes is squeezed to 60% moisture content (calculated on the weight of the dry textile goods) on a foulard that can be adjusted across the width of the fabric.
• the residual moisture in the middle of the web and near the two selvedges is continuously measured using a AF 310 moisture meter (cf. Textilveredlung 14 1979, number 5, pages 178 ff.).
• AF 310 moisture meter cf. Textilveredlung 14 1979, number 5, pages 178 ff.
• both the total moisture and the uniformity of the same are continuously recorded across the width of the goods, and on the basis of the measured values obtained, the squeezing pressure on the padder is adjusted accordingly to the predetermined, set target value using actuators. This gives a web of material dewatered evenly in the length and width of the web to 60% by weight of moisture.
• the roller pressure of the foulard is controlled electronically / pneumatically in such a way that 100% moisture content (calculated on the weight of the dry goods) results on the textile web after the liquor application.
• This moisture content is also measured by means of the above-mentioned type AF 310 moisture meter in the middle of the web and near the two selvedges.
• the uniformity of the moisture on the goods is adjusted to the setpoint to be set of 100% by weight total moisture via actuators on the foulard.
• a uniform liquor application of an additional 40% by weight in addition to the existing moisture and a dye application of 64 g / kg of cotton fabric are thus achieved.
• the goods are wound onto a roller for dye fixation and held for 4 hours at room temperature (15-35 ° C.), after which the dyeing is rinsed and soaped as usual.
• This example should show that it is possible to achieve deep colors (black) using the new fleet application process.
• Example 1 As in Example 1, a wet cotton fabric is passed over a foulard with rollers made of steel core and a thick porous layer (cf. Fischer-Bobsien, International Lexicon Textile Finishing, 1st Progress Volume 1975-78) under the keyword (Roberto Walze) and there evenly to 55% Squeezed moisture content (from the weight of the goods).
• a foulard with rollers made of steel core and a thick porous layer (cf. Fischer-Bobsien, International Lexicon Textile Finishing, 1st Progress Volume 1975-78) under the keyword (Roberto Walze) and there evenly to 55% Squeezed moisture content (from the weight of the goods).
• the roller pressure of the paddle is controlled electronically / mechanically in such a way that 100% moisture content (based on the weight of the goods) results after the liquor application.
• This moisture content is also measured by means of the AF 310 moisture measuring device named in Example 1 in the middle of the web and near the two selvedges.
• the uniformity of the moisture on the goods is regulated on the basis of the measured values obtained from the 1st and 2nd measurement via actuators on the padder to the setpoint value of 100% by weight total moisture. In this way, a uniform liquor application of an additional 45% by weight to the existing moisture and a dye application of 13.5 g / kg of cotton fabric are achieved.
• the goods are wound on a roller to fix the dye and are left for 24 hours at room temperature (15-35 ° C). The dyeing is then rinsed.
• a wet cellulose fabric that has not been dried after the previous washing processes is squeezed to 80% moisture content (based on the weight of the fabric) on a padding that can be adjusted across the width of the fabric.
• the moisture in the middle of the web and near the two edges of the goods is measured by an AF 310 moisture meter (as in Example 1). Both the total moisture and the uniformity across the width of the goods are continuously recorded and, based on the measured values obtained, the squeezing pressure on the padder is adjusted to the specified target value within predetermined tolerances using actuators. In this way, a material web is obtained which is uniformly dewatered in length and width to a moisture content of 80% by weight.
• the web is then impregnated on a padder similar in construction to the drainage pad from the gusset with a pad bath at 20 ° C and then squeezed off.
• the roller pressure of the paddle is manually adjusted taking into account the registered measured values, which are read by a second moisture measuring device of the type mentioned above, so that 125% moisture content of the product weight results after the liquor application.
• the uniformity of the moisture on the goods is regulated on the basis of the measured values obtained from the 1st and 2nd measurement via actuators on the foulard to the setpoint of 125% by weight total moisture to be set. In this way, a uniform liquor application of an additional 45% by weight in addition to the existing moisture and a dye application of 18 g / kg of cellulose fabric are achieved.
• the web After padding, the web is passed through a heating shaft to fix the dye and heated to 70 ° C.
• This heating shaft is connected upstream of a chamber in which a device for rolling up the material web is mounted (pad-roll system).
• the web is rolled up in the chamber and kept rotating for 3 hours at an ambient temperature of 70 ° C.
• the dyed goods are rinsed and soaped as usual for reactive dyes.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Treatment Of Fiber Materials (AREA)
• Coloring (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

Family

ID=6113383

Family Applications (1)

Country Status (6)

Families Citing this family (6)

Family Cites Families (7)

• 1980
  • 1980-10-01 DE DE19803037156 patent/DE3037156A1/de not_active Withdrawn
• 1981
  • 1981-09-26 EP EP81107664A patent/EP0049441B1/de not_active Expired
  • 1981-09-26 AT AT81107664T patent/ATE7052T1/de not_active IP Right Cessation
  • 1981-09-26 DE DE8181107664T patent/DE3163097D1/de not_active Expired
  • 1981-09-29 US US06/306,876 patent/US4439881A/en not_active Expired - Fee Related
  • 1981-09-30 CA CA000387054A patent/CA1182955A/en not_active Expired
  • 1981-09-30 JP JP56154015A patent/JPS5789689A/ja active Granted

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