JP2010242258A - Method and device for padding treatment of fibrous materials - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and device for padding treatment, the method and device being capable of producing evenly-treated fibrous materials and reducing loss of the treatment agent when immersing fibrous materials in a treatment fluid for padding treatment. <P>SOLUTION: While padding treatment is being performed, i.e. the fibrous material is immersed in a padding tank 1 that stores the treatment fluid and nip rolls 4 are evenly applying the treatment fluid, the optical intensity of the treatment fluid S in the padding tank 1 is measured by an optical sensor 20 and a concentration measurement unit 21, and the quantity of treatment fluid S is measured by a fluid-surface sensor 22 and a quantity measurement unit 23. A control unit 30 calculates, on the basis of the measured optical intensity and fluid quantity, the amount of concentrated treatment fluid that needs to be added to bring the concentration and quantity of the treatment fluid in the padding tank to prescribed levels. The control unit then adds concentrated treatment fluid T from a refill tank 17 to a preparation tank 15 and prepares refill processing fluid ST, which is then supplied to the padding tank 1. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a processing method and apparatus for padding a finishing agent or the like in a dyeing finish processing of a fiber material, and more specifically, in obtaining a uniformly processed fiber material, the concentration of the processing fluid during processing. And a processing method and apparatus for adjusting the concentration and the liquid amount while measuring the liquid amount.

  Conventionally, in dyeing finish processing of fiber materials, processing with various processing agents is performed for the purpose of imparting functionality such as water repellency, flame resistance, fastness improvement to the fiber material, and adjusting the texture. Is going. As the processing method, the fiber material is continuously immersed in the processing liquid in a spread state, applied with a processing liquid by a nip roll, and then dried (so-called padding processing). For drying, a heat setter is used. It is common to use.

  Here, as padding processing methods, dry pad processing in which a dry fiber material is immersed in a liquid (processing liquid) containing a processing agent and wet pad processing in which a wet fiber material is immersed in the processing liquid are two. One is mainly mentioned.

  When dry pad processing is performed, since the dried fiber material is continuously immersed in the processing liquid, the concentration of the processing agent in the processing liquid in the padding tank does not decrease. Therefore, the processing liquid to be replenished during processing may be the same as the concentration of the processing agent in the processing liquid as in the initial state, and it may be replenished by the amount of the processing liquid in the padding tank reduced. .

  In many cases, the fiber material before padding is wet by performing a wet process such as dyeing. Therefore, when performing dry pad processing, it is necessary to dry the fiber material once before processing, and problems such as an increase in process and cost increase occur, which is not economical.

  On the other hand, when wet pad processing is performed, the processing liquid can be applied to the wet fiber material, and thus a drying step prior to processing such as dry pad processing is not required.

  However, by performing padding processing on the wet fiber material, moisture contained in the fiber material is brought into the padding tank, so that the concentration of the processing agent in the processing liquid in the padding tank decreases as it is processed. There's a problem.

  In order to maintain a constant concentration of the processing fluid in the padding process, it is necessary to replenish the processing fluid with a higher concentration than the initial concentration of the processing fluid. There is.

  However, in conventional wet pad processing, there is no way to measure and adjust the concentration of the processing fluid in the padding tank during processing, and the concentration of the processing fluid in the processing fluid to be replenished and the amount of processing fluid to be replenished Was determined by the amount of eyes. For this reason, it is not possible to perform accurate concentration management, and quality problems such as unevenness in the way the working fluid is applied to the fiber material, and problems such as loss of material costs due to excessive addition of the working fluid over the required amount was there.

  On the other hand, in the field of dyeing processing, in order to control the dye concentration in the dyeing process, a method is known in which the dye concentration is determined by measuring the spectral response of the dye, and the dye concentration is continuously monitored and controlled. (For example, patent document 1).

  However, the above method is a method that can be used only for a material having a specific absorption spectrum in the visible region. In particular, a general working fluid used for finishing has no specific spectrum in the visible region. For this reason, it has been impossible to control the concentration of the working fluid used for finishing by the above method.

  Therefore, as a solution, a detection indicator having a specific absorption spectrum in the ultraviolet region is input to the processing liquid, and the concentration of the finishing agent of the processing liquid is calculated by measuring the absorbance of the processing liquid, and the finishing agent of the processing liquid is calculated. A method of controlling the concentration of the liquid has been proposed (for example, Patent Document 2).

  However, the finishing liquid concentration control method disclosed in Patent Document 2 does not consider the time lag from measurement to replenishment, and the concentration change of the finishing liquid in the machining liquid may increase. There was a problem.

  In addition, the control method disclosed in Patent Document 2 is not a practical method because the amount of machining fluid is not managed.

  In addition, the control method disclosed in Patent Document 2 may increase or decrease the amount of machining fluid in the padding tank in the course of performing continuous machining. In particular, when the amount of the processing liquid is decreased, it is difficult to sufficiently immerse the fiber material in the processing liquid, the amount of the processing agent applied to the fiber material is decreased, and the fiber material may not be processed uniformly. For this reason, even if the amount of processing fluid in the padding tank increases or decreases during processing, it is necessary to set the amount of initial processing fluid to a large amount that can sufficiently immerse the fiber material. Necessary. Therefore, when such a control method is used, the equipment becomes less space efficient, and the equipment cost is increased, for example, the equipment for replenishing the processing liquid and making the concentration of the processing liquid in the padding tank larger. High and not economical.

  Further, a large amount of machining fluid remains at the end of machining, and the remaining machining fluid is discarded, which is not economical.

Japanese Patent Laid-Open No. 7-181133 JP-A-9-310269

  The present invention has been made in view of such a current situation, and the object of the present invention is a fiber material that is uniformly processed when padding is performed by immersing the fiber material in a padding tank that stores a processing liquid. It is an object to provide a padding method and apparatus capable of reducing the loss of a processing agent.

  The padding processing method according to the present invention is a padding processing method in which a fiber material is immersed in a padding tank that stores a processing liquid and the processing liquid is uniformly applied by a nip roll, and the light intensity of the processing liquid in the padding tank during processing and Measure the amount of liquid, calculate the concentration of the processing liquid in the padding tank and the replenishment amount of the processing concentrate necessary to make the liquid amount a predetermined value based on the measured light intensity and liquid amount, and calculated A replenishment processing liquid is prepared based on the replenishment amount of the processing concentrated liquid, and the prepared replenishment processing liquid is supplied into a padding tank. Furthermore, an indicator that absorbs light in a specific wavelength region is added to the processing liquid, and the absorbance of the processing liquid during processing in the specific wavelength region is measured.

  A padding processing apparatus according to the present invention is a padding processing apparatus comprising a padding tank for storing a processing liquid and a nip roll for uniformly applying the processing liquid to a fiber material immersed in the padding tank. A light intensity measuring means for measuring the light intensity of the machining liquid, a liquid volume measuring means for measuring the liquid volume of the machining liquid in the padding tank during machining, and the padding tank based on the measured light intensity and liquid volume A processing means for calculating a replenishment amount of the processing concentrated liquid necessary for setting the concentration and the liquid amount of the processing liquid to a predetermined value, and preparing a replenishing processing liquid based on the calculated replenishment amount of the processing concentrated liquid And a supply means for supplying the padding tank. Furthermore, the padding tank is provided with a dewatering means for dewatering the fiber material before or after being immersed.

  According to the padding processing method of the present invention, the light intensity and the liquid amount of the processing agent in the processing liquid in the padding tank being processed are automatically measured, and the concentration and the liquid amount of the processing liquid in the padding tank are set to predetermined values. Since the replenishment processing liquid is supplied as described above, a uniformly processed fiber material can be obtained, and the loss of the processing agent can be reduced.

It is a schematic block diagram regarding the padding processing apparatus which concerns on this invention. It is the schematic side view which looked at the padding tank about the padding processing apparatus shown in FIG. 1 from the arrow A direction. It is the list which put together the processing result of Example 1. FIG. 3 is a graph showing a processing process related to Example 1. 6 is a list summarizing the processing results of Comparative Example 1. 5 is a graph showing a processing process related to Comparative Example 1.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments described below are preferable specific examples for carrying out the present invention, and thus various technical limitations are made. However, the present invention is particularly limited in the following description. Unless otherwise specified, the present invention is not limited to these forms.

  The material of the fiber material to be processed in the processing method of the present invention is not particularly limited. For example, natural fibers such as cotton, hemp, wool, silk, etc .; regenerated fibers such as rayon and cupra; diacetate, triacetate Semi-synthetic fibers such as polyamide (6 nylon, 66 nylon, etc.), polyester (polyethylene terephthalate (including cationic dyeable polyethylene terephthalate), polybutylene terephthalate, etc.), polyolefin (polyethylene, polypropylene, etc.), polyacrylonitrile, polyurethane And the like, and the like.

  When the fiber material has a form such as a fabric (woven fabric, knitted fabric, non-woven fabric, etc.), the weight per unit area is 1000 g / in consideration of the concentration of the processing agent in the padding tank and the reduction in the amount of the processing fluid. m is preferable, and 50 to 800 g / m is more preferable.

  Further, the processing agent that is padded to the fiber material is not particularly limited, and for example, general processing such as a water repellent, a softening agent, a flameproofing agent, a dye fixing agent, a light fastness improving agent, and an anti-yellowing agent. An agent can be mentioned. Such a processing agent is diluted with water and used as a processing liquid mixed with a processing aid as required. In addition, the processing concentrate for replenishment is set to a concentration higher than the initial concentration of the processing agent that is charged into the padding tank and used. The concentration of the processing concentrated liquid may be set to 2 to 6 times the initial concentration of the processing liquid. If it is less than 2 times, the replenishment amount of the processing concentrated liquid increases, and if it exceeds 6 times, it may not be mixed with the processing liquid uniformly when it is supplied into the padding tank.

  When light is transmitted through the working fluid, light in a specific wavelength region is absorbed by the processing agent contained in the working fluid, so the light intensity in the absorbed wavelength region (for example, the ultraviolet wavelength region) is measured. Thus, the concentration of the processing agent can be calculated. If the processing agent does not have the property of absorbing light in the specific wavelength region, an indicator made of a substance that absorbs light in the specific wavelength region may be added in advance to the processing liquid.

  The indicator to be added preferably has a specific peak within a wavelength range of 200 to 400 nm that is an ultraviolet region, and further preferably has a specific peak within a wavelength range of 200 to 300 nm. When the indicator has a specific peak within such a wavelength range, problems such as a color change due to coloring of the fiber material caused by the addition of the indicator and a decrease in fastness can be suppressed.

  The substance used for the indicator is not particularly limited as long as it has a specific peak within the above-mentioned wavelength range, but is preferably an aromatic compound, and among aromatic compounds, Aromatic sulfonates are preferred from the viewpoints of good compatibility with the finishing agent component of the processing liquid, no coloration on the fiber material, no reduction in fastness, and safety.

  The indicator is preferably added at 0.02 to 0.20% by weight with respect to the processing liquid in the initial state. If the addition amount is less than 0.02% by weight, the peak of light intensity may not be detected. On the other hand, if the addition amount exceeds 0.20% by weight, the light fastness and the like may be lowered, which is not preferable.

  FIG. 1 is a schematic configuration diagram relating to a padding apparatus according to an embodiment of the present invention. The padding processing apparatus includes a padding tank 1 for storing the processing liquid S. The padding tank 1 is formed in a bowl shape extending in the direction of arrow A, and is open upward. A circulation line 10 is connected through a plurality of discharge pipes arranged in the direction of arrow A communicating with the bottom surface of the padding tank 1. The circulation line 10 is piped upward from the lower side of the padding tank 1, and an outflow pipe 11 is connected to the upper end. The outflow pipe 11 extends linearly in the direction of the arrow A, and the machining liquid S flows out from an outflow port drilled at a predetermined interval.

  The circulation pipe 10 is provided with a circulation pump P1, and when the circulation pump P1 is operated, the processing liquid S in the padding tank 1 is discharged to the circulation pipe 10 and flows into the circulation pipe 10. The machining fluid flows from the circulation pipe 10 to the outflow pipe 11 and returns to the padding tank 1 from the outlet. Thus, the machining liquid S in the padding tank 1 is circulated by the circulation line 10.

  FIG. 2 is a schematic side view of the padding tank 1 viewed from the direction of arrow A. The outflow pipe 11 is provided with an outflow plate 12 installed in the upper opening of the padding tank 1, and the processing liquid S flowing out of the outflow pipe 11 flows into the padding tank 1 through the surface of the outflow plate 12. It is like that.

  A plurality of guides provided in the padding tank 1 for the fiber material F conveyed by the guide roller 2 in order to continuously convey and immerse the long fiber material F in the working fluid S stored in the padding tank 1. The material is conveyed in a zigzag manner by the roller 3, and the fiber material F is repeatedly immersed in the processing liquid S. The fiber material F infiltrated with a sufficient amount of the processing liquid S is conveyed by being pressed from both sides by the nip roll 4, and the processing liquid S is uniformly applied to the fiber material F and the excess processing liquid S is squeezed to the outflow plate 12. It is dropped and collected in the padding tank 1 again.

  A dewatering device 5 is disposed in the conveyance path of the fiber material F between the guide rollers 2, and the fiber material F is dehydrated by the dewatering device 5 before being immersed in the processing liquid S in the padding tank 1. Remove water contained in F as much as possible. When there is much moisture contained in the fiber material F before immersion, the density | concentration of the processing agent contained in the processing liquid S in the padding tank 1 will change easily, and provision of a uniform processing agent will become difficult. The moisture content of the fiber material before immersion is preferably less than 60% of the moisture content after immersion.

  Moreover, the dispersion | variation in the application amount of the process liquid S to the fiber material F can be suppressed by dehydrating with the dehydrating apparatus like the nip roll 4 after immersing the fiber material F. FIG. The moisture content of the fiber material F after dehydration is preferably 80% or less.

  As the dehydrating device, other than the illustrated nip roll 4, any device capable of continuous dewatering such as a vacuum dehydrator or a mangle can be used and is not particularly limited.

  Both ends of the branch pipe 13 are connected to the downstream side of the circulation pump P1 of the circulation pipe 10, and the machining fluid S flowing through the circulation pipe 10 is divided and circulated to the branch pipe 13, and then again the circulation pipe 10. To join.

  The branch pipe 13 is provided with an optical sensor 20 that detects light transmitted through the machining liquid S flowing through the branch pipe 13. The concentration measuring unit 21 is a device for measuring the concentration of the processing agent in the processing liquid based on the detection signal from the optical sensor 20, and a specific wavelength region that is absorbed by the processing agent or the indicator with respect to the light that passes through the processing liquid. The light intensity at is measured. The wavelength region to be measured is not particularly limited as long as it can be measured in a certain wavelength range, for example, every 10 nm in the ultraviolet region and the visible region, typically in the wavelength region of 200 to 800 nm. A short one is preferable.

  As shown in FIG. 1, a liquid level sensor 22 is installed in the padding tank 1, and the processing liquid stored in the padding tank 1 by the liquid amount measuring unit 23 based on a detection signal from the liquid level sensor 22. The amount of liquid is measured. Examples of the liquid level sensor include a magnetic type, an optical type, an electrode type, and an ultrasonic type, but are not particularly limited. In the measurement of the liquid amount, if the liquid level corresponding to the liquid level position in the padding tank 1 is measured in advance, when the liquid level position in the padding tank 1 is detected by the liquid level sensor, The liquid volume can be calculated.

  A supply pipe line 14 is connected so as to extend a pipe part of the circulation pipe line 10 to which a discharge pipe communicating with the bottom surface of the padding tank 1 is connected. The supply line 14 is connected to the bottom surface of the preparation tank 15, and the preparation tank 15 is a tank for mixing the processing concentrated liquid and water to prepare the replenishing processing liquid ST. A stirrer 15a for stirring when mixing is attached.

  Above the preparation tank 15, the open ends of the two supply lines 16 and 18 are inserted. The supply pipe 16 is provided with a supply pump P 2 and a flow meter 24, and an end thereof is connected to the bottom surface of the supply tank 17. The replenishment tank 17 stores a replenishment processing concentrate T. When the replenishment pump P2 is operated, the replenishment pump T2 causes the processing concentrate T in the replenishment tank 17 to flow into the replenishment pipeline 16 and pass through the flow meter 24. The preparation tank 15 is replenished. At that time, the replenishment amount of the processing concentrate T replenished in the preparation tank 15 is measured by the flow meter 24.

  A flow meter 25 is attached to the supply line 18, and an end thereof is connected to a water supply source (not shown). Water flowing through the supply pipe 18 passes through the flow meter 25 and is supplied into the preparation tank 15. At that time, the replenishment amount of the water replenished in the preparation tank 15 is measured by the flow meter 25.

  The control unit 30 includes a circulation pump P1 and a replenishment pump P2 based on the measured values from the concentration measuring unit 21, the liquid level measuring unit 23, and the flow meters 24 and 25, on-off valves provided in each pipeline and each pipe, and the like. The machining fluid S is replenished under control.

  Next, the processing by the padding apparatus described above will be described. First, a processing liquid S having a preset processing agent concentration (initial concentration) is charged into the padding tank 1 in advance. In this case, the processing concentrate T and water necessary for the initial concentration and the initial liquid amount may be charged into the preparation tank 15 to prepare the processing liquid and supply it to the padding tank 1.

  After supplying the processing liquid S to the padding tank 1, the fiber material F is conveyed and introduced into the padding tank 1, the fiber material F is repeatedly immersed in the processing liquid S and squeezed by the nip roll 4, and the fiber material F is padded. Do.

  Since the fiber material F is continuously introduced into the padding tank 1 in a wet state, if the padding process is continuously performed, the influence of moisture contained in the fiber material F and the processing liquid S penetrates the fiber material F. By doing so, the concentration of the processing agent of the processing liquid S in the padding tank 1 and the amount of the processing liquid S are changed.

  A variation in the concentration of the processing agent in the processing liquid S is detected by the optical sensor 20 and measured as a variation in light intensity by the concentration measuring unit 21. Further, the fluctuation of the liquid amount of the machining liquid S is detected by the liquid level sensor 22 and measured by the liquid amount measuring unit 23.

The concentration measuring unit 21 measures the light intensity in a predetermined wavelength region, for example, a wavelength region of 200 to 400 nm, which is an ultraviolet wavelength region, for each light having a certain wavelength, for example, 10 nm, for the light transmitted through the machining liquid S. Based on the measured light intensity, the control unit 30 converts the absorbance into the absorbance A according to the following equation (1).
A = log ₁₀ (I ₀ / I) (1)
Here, I ₀ is the light intensity of water, and I is the light intensity of the working fluid.

  Then, based on the calculated absorbance A, the absorbance peak value in a specific and more specific wavelength range determined by the processing agent or the indicator is used as the absorbance of the processing agent. However, when the peak value of absorbance is not detected in the wavelength range corresponding to the processing agent, the average value of the absorbance in that wavelength range is set as the absorbance of the processing agent.

  From the start of the padding process, the circulation pump P1 is operated to introduce the machining fluid S in the padding tank 1 into the branch pipe 13 while circulating it in the circulation pipe 10, and the optical sensor 20 and the concentration measuring unit 21 The light intensity of the working fluid S is always measured to calculate the absorbance of the working fluid S.

I ₁ and A ₁ light intensity and absorbance of the working fluid S in the initial setting, the light intensity and absorbance of the working fluid S padding tank 1 during processing When I _n and A _n, processing liquid S in the processing The concentration C _n [%] of the processing agent is obtained by the following formula (2).
C _n [%] = (A _n / A ₁ ) × C ₁ [%] (2)
Here, C ₁ is the initial concentration of the processing agent of the processing liquid S. Further, A ₁ and A _n is obtained by introducing the I ₁ and I _n in formula (1).

  Next, the control unit 30 performs processing concentration to prepare the necessary replenishment processing liquid ST in response to fluctuations in the concentration of the processing liquid S in the padding tank 1 and the amount of the processing liquid S. The replenishment amount of the liquid T and water is calculated.

First, when the liquid volume V _n [liter] of the machining liquid S in the padding tank 1 being processed is less than the initial liquid volume V ₁ [liter] of the machining liquid S, the following formulas (3) and (4) are used. A replenishment amount R _n [liter] of the processing concentrated liquid T (processing agent concentration X ₁ [%]) and a water replenishment amount W _n [liter] are calculated.
_{R n = K r × {(} V 1 × C 1/100) - (V n × C n / 100)} / (X 1/100) ··· (3)
W _n = K _w × {(V ₁ −V _n ) −R _n / K _r } (4)
Here, _Kr is a replenishment coefficient of the processed concentrated liquid T, and _Kw is a replenishment coefficient of water. Furthermore, selective absorption coefficient when using the indicator is also included in the K _r.

The replenishment coefficients K _r and K _w can be set in advance according to parameters such as measurement timing, concentration and liquid amount, respectively. For example, there is a time lag from measuring the light intensity and the liquid amount to preparing the replenishment processing liquid ST and supplying it to the padding tank 1, and the light intensity and the liquid amount further decrease during that time. If it is set to 1 or more, it is possible to suppress a decrease in the concentration of the processing liquid S and the amount of the processing liquid in the padding tank 1 due to a time lag.

When the amount V _n of the processing liquid S in the padding tank 1 during the processing is equal to or larger than the initial amount V ₁ of the processing liquid S, the replenishing amount R _n of the processing concentrated liquid T is calculated from the following equation (5). To do. In this case, water is not replenished in order to suppress an increase in the amount of the processing liquid S in the padding tank 1.
_{R n = K r × {(} V n × C 1/100) × (C 1 -C n) / C 1} / (X 1/100) ··· (5)

Then, the control unit 30 feeds feed machining concentrate T in the preparation tank 15 from the supply tank 17 by operating the supply pump P2 on the basis of the replenishment amount R _n of working concentrate T calculated by the equation, Water is fed from the supply line 18 to the preparation tank 15 based on the water supply amount W _n . The processing concentrated liquid T and water introduced into the preparation tank 15 are agitated to prepare the replenishing processing liquid ST, and the prepared replenishing processing liquid ST is supplied to the circulation line 10 through the supply line 14. Is done. Since the machining fluid S in the padding tank 1 is constantly circulated through the circulation line 10, the replenishment machining fluid S is joined and circulated while mixing with the machining fluid S, and the machining fluid in the padding tank 1 is circulated. Variations in the concentration and amount of the processing agent for S are suppressed.

  The measurement timing of the concentration and the amount of the processing liquid S and the replenishment timing of the replenishing processing liquid ST are repeated every certain time, or when the liquid amount in the padding tank 1 decreases by a certain amount, either method But it is not particularly limited. However, in order to suppress as much as possible the decrease in the concentration of the machining fluid S and the decrease in the amount of machining fluid immediately after the start of machining, the first measurement is performed within 1 minute after the machining is started, and the padding tank 1 is supplied with the necessary amount. The replenishment operation for supplying the machining fluid is performed.

  About the measurement and replenishment operation after the 2nd time, it repeats every fixed time, or when the liquid amount in the padding tank 1 decreases by a fixed amount, the concentration of the processing agent and the liquid amount of the processing liquid Can be controlled automatically.

For example, when the first measurement is performed 1 minute after the start of machining and the replenishment operation is performed and the second and subsequent measurements are performed every 3 minutes and the replenishment operation is performed, the replenishment coefficients K _r and K of the first replenishment operation are performed. _{If w is set} to 4, and the replenishment coefficients K _r and K _w for the second and subsequent replenishment operations are set to 2, the decrease in the concentration and amount of the processing fluid in the padding tank 1 due to the time lag from the measurement to the replenishment operation. It can be suppressed.

  When the measurement and replenishment operations are repeated at regular intervals, the interval for measuring the light intensity of the working fluid is preferably measured every 2 to 5 minutes. If the measurement interval is less than 2 minutes, the concentration of the working fluid in the padding tank to which the replenishing working fluid is supplied is not uniform, and an error may occur during measurement. Also, if the measurement interval exceeds 5 minutes, the concentration of the processing agent in the working fluid will fluctuate significantly during that time, and the variation in the concentration of the processing agent in the processing fluid will increase when padding is performed continuously. There is a risk that the quality of the finished product will vary.

  However, the measurement interval can be set as appropriate depending on the processing conditions (processing speed, fabric weight, rate of decrease in the amount of processing fluid, amount of moisture contained in the fabric, etc.) and the degree of processing quality required for the product. If the concentration of the processing agent in the working fluid is not significantly reduced even when the time exceeds 5 minutes, it may be set at a longer measurement interval.

  Further, when the measurement and replenishment operations are repeated every time the liquid amount in the padding tank decreases by a certain amount, it is preferable to measure each time the liquid amount in the padding tank decreases to 85 to 95% of the initial liquid amount.

  In a state where the amount of liquid in the padding tank exceeds 95% of the initial liquid volume, the concentration in the padding tank is not uniform immediately after the supply of the replenishing processing liquid, so that an error may occur during measurement. When the amount of liquid in the padding tank is less than 85% of the initial amount of liquid, the concentration of the processing agent in the working fluid fluctuates greatly, and the variation in the concentration of the processing agent in the processing fluid increases when padding is performed continuously. Therefore, there is a possibility that the quality of the processed product may vary.

  Note that the capacity of the padding tank is the allowable range of fluctuations in the concentration of the processing fluid required to satisfy the performance of the final processed product, processing conditions (processing speed, fiber material weight, moisture content of the fiber material before and after padding, and processing The difference can be selected as appropriate in consideration of the difference in the amount of liquid applied and the measurement interval. In consideration of downsizing the installation space of the padding tank, reducing the amount of processing fluid discarded after processing, and shortening the time required to equalize the concentration of the processing fluid, the processing fluid in the padding tank and the circulation pipe The total liquid volume is preferably 400 liters or less.

  Further, the processing speed of the padding process is not particularly limited, but it is 5 to 50 m / min in consideration of productivity, variation in the amount of the processing liquid applied to the fiber material, and change in the concentration of the processing liquid in the padding tank. It is preferable that it is 10 to 30 m / min.

  In addition, in order to suppress fluctuations in the amount of processing fluid applied to the fiber material and changes in the concentration of the processing fluid in the padding tank, the concentration measurement is repeated until the concentration of the processing fluid in the padding tank is made uniform by performing a replenishment operation It is preferable that the time taken for is as short as possible. Specifically, the time from the measurement of the concentration until the concentration of the processing liquid in the padding tank becomes uniform is preferably within 2 minutes. At that time, it is preferable that the time required for preparing the replenishing processing liquid is as short as possible.

  Furthermore, in order to suppress fluctuations in the amount of processing liquid applied to the fiber material and changes in the concentration of the processing liquid in the padding tank, the concentration of the processing liquid in the entire padding tank after the replenishing processing liquid is supplied into the padding tank. It is preferable that the thickness becomes uniform as soon as possible. The supply method of the replenishment machining fluid is not particularly limited, but when the replenishment machining fluid is introduced from a plurality of supply ports formed along the longitudinal direction of the padding tank, the entire replenishment process is performed throughout the padding tank. It is preferably used in that a liquid can be supplied.

  Furthermore, in order to accurately measure the light intensity while keeping the concentration of the processing agent in the padding tank uniform, it is preferable to circulate the processing liquid in the padding tank as quickly as possible in the branch pipe. Is preferably circulated at a flow rate equal to or higher than the amount of the working fluid in the padding tank. In order to increase the flow rate at which the machining fluid is circulated, it is preferable to provide a plurality of 4 to 5 or more discharge ports at the bottom of the padding tank to circulate the machining liquid in the padding tank.

  In addition, when the circulated machining liquid is allowed to flow again into the padding tank, it is preferable that the machining liquid flows evenly throughout the padding tank. There is no particular limitation on the method of inflow of the machining fluid, but if multiple machining inlets are provided in the longitudinal and width directions of the padding tank, the machining fluid will flow uniformly throughout the padding tank. It is preferably used because it can be used.

Example 1
As a fiber material, a 110 dtex nylon 100% plain fabric (1 fabric is 30.0 kg / 50 m fabric, 42 fabric) is prepared, and using two liquid flow dyeing machines, the composition of formulation 1 shown below is prepared. Dispersion dyeing was performed for 30 minutes at a maximum dyeing temperature of 100.degree.

<Prescription 1>
Aminyl Yellow FD-3RL 0.3% owf
(Acid dyes; manufactured by Sumitomo Chemical Co., Ltd.)
Aminyl Red FD-3BL 0.3% owf
(Acid dyes; manufactured by Sumitomo Chemical Co., Ltd.)
Aminyl Blue FD-GL 0.3% owf
(Acid dyes; manufactured by Sumitomo Chemical Co., Ltd.)
Acetic acid 0.5 cc / liter Here, [owf] is an abbreviation for [on weight fabric].

  Thereafter, the dyeing residual liquid is drained, washed with water in accordance with a conventional method, and then the fabric is wetted and loaded onto two carriages from two dyeing machines. A 2100 m piece was dropped on one trolley and loaded at a height of 2 m, and the trolley was left for 6 hours.

  In addition, the moisture content of the uppermost powder of the fabric loaded on the cart after 6 hours was 15%, and the moisture content of the lowermost powder of the bottom of the cart was 150%.

  Thereafter, the padding processing apparatus shown in FIG. 1 in a wet state (2 minutes is required until the concentration of the processing liquid in the padding tank becomes uniform when 50 liters of processing liquid for replenishment is supplied from the measurement of light intensity. After the padding was performed with the processing conditions and the processing agent formulation shown below according to the pump capacity and piping route set so that the heat setting processing was performed at 170 ° C. for 90 seconds with a heat setter. The results of padding according to Example 1 are shown in FIGS.

<Processing conditions>
Total liquid volume to be used: 300L
Processing speed: 30 m / min (processing time: 70 minutes)
Water content of dough after dehydration by padding tank pre-dehydrator (vacuum dehydrator): 15-40%
Water content of dough after dehydration by padding tank dehydrator (mangle): 70%
<Use conditions of processing agent>
Sun Life TN-8 (manufactured by Nikka Chemical Co., Ltd., polyhydric phenol / formalin polycondensate, solid content 43% aqueous solution)
Initial concentration in padding tank: 0.20% ows
Concentration of processing concentrate in supply tank: 0.60% ows
Here, [ows] is an abbreviation for [on weight solution]. Further, the concentration of the processing agent was determined by measuring the peak value of absorbance in the ultraviolet wavelength region of 262 nm.
<Setting conditions for measurement and supply operation>
(Light intensity measurement interval)
1 minute for the first time (replenishment coefficient K _r = 4, replenishment coefficient K _w = 4)
3 minutes after the second time (replenishment coefficient K _r = 2 and replenishment coefficient K _w = 2)

(Comparative Example 1)
After the same fiber material as in Example 1 is dyed, loaded, and left in the same prescription as in Example 1, based on the replenishment control method of Patent Document 2, the processing conditions and the concentration of the processing agent are the same as in Example 1. Padding processing was performed. The result of the padding process by the comparative example 1 is shown in FIG.5 and FIG.6.
<Supply control method>
(When A ₀ > A _n )
Replenishment amount of processing concentrate [liter] = (A ₀ −A _n ) / A ₀ × V × 1 / K ₁ (6)

(When A ₀ <A _n )
Replenishment amount of water [liter] = (A _n −A ₀ ) / A ₀ × V (7)
here,
A _0: machining liquid absorbance of the initial setting state in the padding bath A _n: absorbance V of the working fluid in the padding bath during processing: the total amount of the working fluid circulating [l]
K ₁ : Ratio of processing liquid concentration to processing liquid concentration

  In Example 1, the change in the concentration of the machining fluid relative to the initial concentration of the machining fluid is within ± 5%, and the change in the amount of the machining fluid is also within ± 10%, so that stable padding is performed. On the other hand, in Comparative Example 1, the initial concentration and the initial liquid amount may be exceeded, and the fluctuation range is large. Therefore, in Example 1, uniform and good padding can be stably performed on the fiber material.

  Further, compared with Comparative Example 1, in Example 1, the remaining amount of the machining liquid after the machining is small, and machining with less loss is possible.

1 Padding tank 2 Guide roller 3 Guide roller 4 Nip roll 5 Dehydrator
10 Circulation line
11 Outflow pipe
12 Inflow plate
13 Branch piping
14 Supply pipeline
15 Preparation tank
16 Supply line
17 Supply tank
18 Supply line
20 Optical sensor
21 Concentration measurement unit
22 Liquid level sensor
23 Liquid volume measuring unit
24 Flow meter
25 Flow meter
30 Control unit

Claims (4)

  In the padding processing method in which the fiber material is immersed in a padding tank that stores the processing liquid and the processing liquid is uniformly applied by a nip roll, the light intensity and amount of the processing liquid in the padding tank during the processing are measured and measured. Based on the calculated light intensity and the amount of liquid, calculate the replenishment amount of the processing concentrate necessary to bring the concentration and amount of the processing liquid in the padding tank to a predetermined value, and based on the calculated replenishment amount of the processing concentrate A replenishing working fluid is prepared, and the prepared replenishing working fluid is supplied into a padding tank.   The padding processing method according to claim 1, wherein an indicator that absorbs light in a specific wavelength region is added to the processing liquid, and the absorbance in the specific wavelength region of the processing liquid being processed is measured.   Measures the light intensity of the processing liquid in the padding tank during processing in a padding processing apparatus having a padding tank for storing the processing liquid and a nip roll that uniformly applies the processing liquid to the fiber material immersed in the padding tank. Light intensity measuring means, liquid amount measuring means for measuring the amount of processing liquid in the padding tank during processing, and concentration and amount of processing liquid in the padding tank based on the measured light intensity and liquid amount A calculation means for calculating a replenishment amount of the processing concentrate necessary to obtain a predetermined value; a supply means for preparing a replenishment processing liquid based on the calculated replenishment amount of the processing concentrate and supplying it into the padding tank; A padding apparatus characterized by comprising:   4. The padding apparatus according to claim 3, further comprising a dehydrating unit for dehydrating the fiber material before and after being immersed in the padding tank.

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