KR20000068808A - A method to continuously treat wool - Google Patents

Abstract

The present invention relates to a method of continuously treating a web of wool slivers, which method

(i) continuously treating the web with a nonionic epoxidation detergent,

(ii) continuously treating said web with monovalent persulfate or a salt thereof,

(iii) continuously treating the web with a solution containing sulfite, and

(iv) treating the webs sequentially with emulsions, dispersions or microemulsions of aminofunctional polydimethylsiloxanes, each in sequence.

Description

How to continuously process wool {A METHOD TO CONTINUOUSLY TREAT WOOL}

The amount of wool to be preshrunk in order to impart machine washability or easy handling properties is on the rise, and such treatment methods have been described in numerous literatures. The most common method of imparting shrinkage to wool involves first oxidizing the wool and then treating it with a polymer. This method is described in K.R.Markinson, "Shrinkproofing of Wool", Marcel Dekker Inc. New York 1979. The most common type of oxidation treatment used to preshrink wool uses chlorine atoms as a solution of gas or aqueous solution, hypochlorous acid or salts thereof, or organic chlorinating agents such as N, N'-dichloroisocyanuric acid or salts thereof. Related to the chlorination process. Bryne et al., Proc. 9th Intern. Wool Textile Res. Conf. Biella Italy 1995, vol 1, p234, presently claim that more than three quarters of commercial preshrinkage is related to chlorination. In recent years, environmental concerns have increased about the use of preshrunk treatments related to chlorination treatments, since chlorinated compounds may be released during treatment or during subsequent dyeing or hydration treatments. The release of these compounds into the atmosphere is prohibited by some countries as a law to limit the release of adsorbent organohalogen compounds (AOX). Another problem associated with chlorination preshrink wool is that the feel of the fabric made of wool becomes rough after processing.

Thus, methods have been developed to impart shrinkage to wool without the use of chlorination steps. The most common of these methods is the use of monovalent persulfuric acid or salts thereof (hereinafter abbreviated as PMS) as oxidant.

Presumptive property is not an absolute characteristic. Shrinkage (usually assessed by measuring the amount of change in area or length of a piece of fabric after a designated wash test) is characterized by wool properties (average fiber diameter and length, fiber strength, etc.), fabric structure (number of yarns, degree of twist of the yarn). , Knitted or woven tissue, etc.) and cleaning assays (type of washer, duration of testing, pH, temperature, salt concentration, pass / failure regulations, etc.) of the wash. In accordance with the International Wool Secretariat Test Method 31, the shrinkage properties consistent with the object of the present invention are such that the specimens used for the test are knitted with 2/22 count yarns with a cover factor of 1.1, and a Wascator Relaxing with 5 ISO 5A wash cycles after 1 ISO 7A wash cycle in a front loading machine) is considered to be shrink-proof, indicating an area shrinkage of less than 10%. Thus, the so-called shrinkage in the literature can now be considered to be poor or not shrinkproof.

Other effects of treating wool with chemicals such as PMS result in different effects (e.g., amount of reaction, type of reaction, or location where the reaction occurs in the fiber), thus affecting shrinkage and other properties. Three general types of treatments can be considered, namely batch, continuous and semi-continuous (or pad / store) treatments, and these can be changed by varying the type of equipment used or the method of operation of the equipment. A variation of is also possible. In a batch treatment, wool is left in the container for typically 10 minutes to 1 hour, and chemicals are added at once or slowly. A characteristic of batch processing is that it takes a long reaction time for small molecules to diffuse into the fiber. In a continuous treatment, wool is worked quickly through a bowl containing a solution of chemicals, and then the wool is pressed by tightly passing it through another bowl or a series of bowls containing water or other chemicals. This continuous reaction is characterized by a short reaction time, which is usually about 15 seconds, and as a result, the reaction tends to be limited to the fiber surface. In the semi-continuous or pad / store method, wool is first passed through a solution of chemicals with a nip of horizontal pad mangle and then stored for 1 to 5 minutes before passing through a series of bowls as in a continuous manner. In this method, the reaction time is somewhere between continuous and batchwise. In the semi-continuous method, when the reaction is exothermic during storage, the temperature rises, which is different from the continuous type in which a large amount of solution is contained in the bowl and the temperature is kept constant. This is also different from batch. Another variation of the continuous method is related to the design of the bowl, and in the initial installation, backwashing bowls are used where the web of wool is concentrated around a series of solid rollers immersed in the treatment solution, In modern suction drum bowls the web passes around the outer surface of the perforated drum and the solution is absorbed by the pump means for continuously passing the web through the drum and then returned to the bowl. The pumping motion in the suction drum bowl allows the wool web to be treated evenly, while in the backwash bowl the outer surface of the web may have a greater chemical reaction than the center of the web. For example, in a continuous process, the degree of reaction or treatment can be influenced by another method of controlling the rate at which wool is transported into the bowl or by varying the amount of liquid pumped through the suction drum ball.

PMS is known to impart preshrinkability to wool and, for example, British Patents 692,258, 716,806 and 1,084,716 describe batch, pad / store or continuous treatment using backwashing bowls, Was low. Connell's Deutschen Wollforschungsinstitute Reports, Vol 114, 1995, page 183 describes that low shrinkage is provided from a chemical continuous (pad / store) PMS known as Dylan XCP. Shrinkage is another oxidizing agent, such as chlorinating agents (British patents 1,073,441 and 1,118,792) or permanganate (British patents 872,292 and 991,163 and the brine et al.) Or hydrogen peroxide (British patent 1,071,053) It is enhanced by subsequent processing using. In PCT application WO 92/00412, wool is treated simultaneously with PMS and hydrogen peroxide by the pass store method. In addition, PCT application WO 92/00412 describes a method of adding a polymer to further improve the shrinkage property. Suitable polymers for use in improving the shrinkage properties are described as containing polymers containing amino groups and having carbon atoms in the main chain, some of which may be substituted with nitrogen or oxygen atoms (e.g., US Pat. No. 3,811,835, European Patents 414,377 and 315,477. However, such polyamine treatments cause coarse hand or dyeing problems. PCT application WO 93/13260 describes a method of simultaneously treating wool with three components: PMS, hydrating / refining agent and swelling agent / dispersing agent. This patent describes a batch treatment method and claims a continuous treatment method. It was not proven in the examples. GB Guise, Deutschen Wollforschungsinstitutes Schriftenreihe, 1991, Vol 108, page 627, describes a continuous (suction drum) PMS wool treatment at 5 meters / minute, which provides a high degree of shrinkage. . Cornell (Deutschen Wollforschungsinstitutes Reports, Vol 114, 1995, page 183) describes a method for improving the shrinkage of wool by PMS continuous treatment. P. Schurck et al., Proc. 9th Intern. Wool Textile Res. Conf. Biella Italy 1995, vol 1, p199, describes a continuous PMS preshrunk treatment.

Treatment of wool using PMS in other ways results in the treated wool exhibiting different effects, different shrinkage or other properties, and generally cannot predict the results obtained by other methods from the results obtained by one treatment method.

The inventors have continued to process the wool sliver with PMS and then significantly improve the properties of the wool compared to conventional batch PMS treatments or conventional semi-continuous pad / store PMS treatments by processing steps that allow higher processing speeds. Came to discover that.

The present invention relates to a method of imparting anti-shrinkage by continuously treating webs of wool slivers. More specifically, the present invention relates to a method for shrink-proofing wool slivers, which method does not have a chlorination step, can process wool webs of wool slivers at high speed, and has a sliver having a weight of 20 ktex or more. The web can be processed.

According to the present invention there is provided a method of continuously processing a web of wool slivers, each comprising the following steps (i) to (iv) in order.

(i) continuously treating the web with a nonionic epoxidation detergent,

(ii) continuously treating said web with monovalent persulfate or a salt thereof,

(iii) continuously treating the web with a solution containing sulfite, and

(iv) continuous treatment of the web with an emulsion, dispersion or microemulsion of aminofunctional polydimethylsiloxane.

Hereinafter, (i), (ii), (iii) and (iv) are referred to as step (i), step (ii), step (iii) and step (iv), respectively.

Due to the surprising fact that high specific shrinkage (to be described later) is imparted by the above-described specific treatment sequence, such shrinkage can be imparted to fine wool. In contrast, conventional continuous PMS treatments do not provide this high degree of shrinkage or are only achieved when using very low speed and much lighter weight slivers, which means that the average fiber diameter is 18 microns. It is not applicable to wool as fine as it is. It is well known that fine wool (eg, average fiber diameter of 18 microns) is more difficult to impart shrinkage than coarse wool (see Markinson's, supra). A particular advantage of the present invention is that webs of wool slivers having a weight of at least 30 ktex and a fiber diameter of at least 18 microns can be processed at speeds in excess of 8 meters / minute.

The inventors found that it is necessary to carry out each of the steps (i), (ii), (iii) and (iv) specified in four steps in order to improve the shrinkage property. It was also found that if one or more steps were omitted, the shrinkage was significantly reduced.

Wool, which is the subject of the present invention, may be comber treated or may be in the form of slivers which may not be treated. In other words, this method is useful not only for waste slivers but also for tops. Slibers that are continuously processed typically weigh 15 ktex or more. The inventors have found that high degree of shrinkage can be obtained by treating slivers of 30 ktex or 40 ktex according to the present invention. In the prior art, in a continuous industrial processing process such as PMS and chlorination treatment, about 20 ktex slivers are generally used, and heavy slivers, especially slivers of 30 ktex or more, are unilaterally treated. It is well known that it is obtained, and the shrinkage property is poor. According to the present invention, it is possible to process slivers of 30 ktex or more, for example 40 ktex, so that productivity is greatly improved.

The process of the present invention can be carried out in any apparatus suitable for the continuous treatment of webs of wool slivers to treat the webs with solution. The inventors have found that it is desirable to continuously process the web of wool slivers in a series of suction drum bowls. Other types of devices, such as immersion bowls or webs, can be used to transport them or spray them between two continuous perforated belts, but they do not impart presumptive properties such as suction drum bowls.

The residence time of each of (i), (ii), (iii) and (iv) specified in four steps is about 10 to about 20 seconds, preferably about 15 seconds. For example, in a suction drum about 500 millimeters in diameter, a one meter wide drum typically has a volume of 400 to 600 liters of bowl, and the solution has a volume of about 2 to 4 bowls / minute, typically 3 bowls / minute Pumped through the drum at a speed of. This dwell time corresponds to all web speeds exceeding 8 meters / minute.

Typically, when a series of suction drum bowls are actually operated, they are not all operated at the same speed. In general, the first bowl is slightly slower than the second bowl, and in this way the second bowl is operated at a slightly slower speed than the third bowl. For this reason, wet webs tend to be slightly drafted. That is, the web is extended so that the weight per unit length is slightly reduced. In conclusion, a speed of 8 meters / minute refers to the speed of the wool web as the wool web exits the last bowl. The advantage of the present invention is that it is possible to give a high degree of shrinkage even when working at a high speed of 8 meters / minute or more, especially 10 to 12 meters / minute, which has not been possible until now. The ability to treat wool webs at speeds above 10 meters / minute under industrial conditions significantly improves productivity compared to prior art methods operating at slow speeds. This is in contrast to the prior art continuous PMS process, which needs to be processed at a slow rate. A series of suction drum bowls prevents the web from passing through a series of compression rollers when excess wool web leaves each suction drum bowl, and removes excess liquid from the web by the compression rollers. It is desirable to operate the pump to countercurrent to the suction drum bowl.

In order to obtain a uniform treatment throughout the present invention, the inventors preferably maintain the concentration of various bowls as constant as possible, and are removed by reaction with the wool or by being deposited on the wool, and the wool is accompanied by a solution. It has been found that there is a need to constantly add reaction reagents to compensate for the removal by transfer to the bowl. Thus, hereinafter, the preferred conditions of the present invention are defined in terms of steady state suction drum bowl concentrations rather than treatment levels (generally expressed in weight percent of wool). These concentrations are provided as a range and depend on the processing speed and the type of wool, in particular the average fiber diameter. To compensate for variations in treatment solution concentration, the rate of addition required to maintain a constant concentration is readily determined by simple experiments.

It is well known that untreated wool hydrates slowly when placed in water because of the presence of a lipid layer on the surface of the wool fibers. Thus, a method of adding a hydrating agent has been carried out in the first step of wool treatment. Such hydrating agents are particularly important in the continuous treatment method because of the short time available for the reaction. For example, when a dry wool sliver is placed in a PMS solution in a suction drum bowl operating at 5 to 15 meters / minute as described above, this treatment becomes uneven because the center of the sliver is immersed. This is because it is not fully hydrated. In conclusion, in a continuous PMS treatment, a hydrating agent is generally added to the PMS treatment solution. The inventors have discovered the surprising fact that when the continuous treatment using a mixture of PMS and a wetting agent is replaced with steps (i) and (ii), the imparted shrinkage is surprisingly improved. The process of the present invention provides a surprising improvement even in the case of continuous processing using PMS and high content hydrates on the order of 5 to 10 g / l.

The inventors found that the content of the nonionic ethoxylated detergent used in step (i) depends on the web, the type of nonionic ethoxylated detergent and the time the wool sliver stays in the detergent solution in the case of wool slivers. I found that. The concentration of the nonionic ethoxylated detergent in step (i) is preferably 4 to 10 g / l, more preferably 5 g / l. The temperature of step (i) is preferably 40 to 70 ° C, more preferably 50 ° C.

The nonionic ethoxylated detergent can be any detergent used as standard refining agent in the industry. Nonionic ethoxylated detergents are preferably alkylene oxides, more preferably ethylene oxide, derivatives of fatty alcohols or alkyl phenols. Preferred detergents are derivatives of fatty alcohols having C ₁₀ to C ₂₀ or mixtures thereof or alkylphenols having C ₇ to C ₁₂ alkyl groups reacted with 5 to 15 moles of ethylene oxide.

In a preferred method, step (i) is provided with a suction drum bowl, but other types, including a Pleissner separation pad chlorinator and a Kroy deep immersion chlorinator commonly used for continuous chlorination preshrunk treatment of wool. A device may also be provided. Devices of this kind are readily adopted for the treatment of webs using nonionic ethoxylated detergents.

In step (i), for example, when a dry web of wool is introduced into a suction drum bowl containing a nonionic ethoxylated detergent and the web leaves the bowl in a wet state, the volume of liquid contained in the bowl will change over time. Accordingly. In addition, dust and fat are accumulated in the bowl. Therefore, it is preferable to add a nonionic ethoxylated detergent to the bowl, and the addition rate of the detergent solution is preferably 2 to 10 times the weight of the dry wool web introduced into the bowl at the prescribed time, and most preferably 5 to 8 times. .

The monovalent persulfate or salt thereof is preferably an aqueous solution obtained by dissolving triple salt 2KHSO ₅ KHSO ₄ K ₂ SO ₄ in water, which triple salt is commercially available as Carlot (Degussa) or Oxone (Dupont). Those skilled in the art will appreciate that a solution of PMS triple salt may be substituted with a solution containing pure monovalent persulfate at the same concentration or a sodium salt solution of monovalent persulfate adjusted to pH 2 using sulfuric acid. In addition, monovalent persulfate can be easily prepared by the reaction of hydrogen peroxide and sulfuric acid.

In a preferred process of the invention, the second suction drum bowl uses a solution of monovalent persulfate or salt thereof, preferably in water at a concentration range of 20 to 60 g / l, preferably at a temperature of 20 to 60 ° C. In a more preferred process of the invention, two separate suction drum bowls containing monovalent persulfate or salts thereof are used in step (ii).

The sulfite solution used in step (iii) is preferably a solution of sodium sulfite having a concentration of 20 to 50 g / l and a temperature of 20 to 50 ° C. The sulfite solution is preferably maintained at a pH range of 8 to 10, for example by the addition of sodium carbonate or sodium hydroxide. Those skilled in the art will appreciate that the sulfite solution is made of potassium sulfite and the solution of sodium bisulfite, sodium metabissulphite or sulfur dioxide is adjusted to 8-10 with alkali.

The aminofunctional polydimethylsiloxanes useful in the present invention have linear or branched backbones, and the aminofunctional groups can be clustered or randomly distributed along the polydimethylsiloxane backbone. The aminofunctional groups are preferably spaced apart by silicon atoms of the main chain and three or more carbon atoms, and may be primary, secondary or tertiary aliphatic amines or mixtures thereof. Examples of suitable commercial aminofunctional polydimethylsiloxanes include SM 8709 (Torrey Dow Corning) CT 45e and VP 1445e (Schenker Chemie) and JG4008A and AR4136A (Plexichem).

The aminofunctional polydimethyl siloxanes may be in the form of emulsions, dispersions or microemulsions, the addition of cationic emulsifiers, nonionic emulsifiers or anionic emulsifiers, preferably 2-20 g / l aminofunctional polydimethylsiloxanes, more preferably Is easily prepared by addition at a concentration in the range of 5 to 15 g / l. The pH is preferably maintained in the range of 4-7.

Other materials known to affect fiber properties other than preshrinkage can be easily added to step (iv) with aminofunctional polydimethylsiloxanes, including, for example, lubricants (subsequent gilling, seminal wool, drawing and spinning performance). Antistatic agents, fungicides, fungi, insect repellents and softeners (e.g., long chain quaternary ammonium surfactants). The use of such materials is well known to those skilled in the textile arts. If such a substance is added in step (iv), the substance should not contain any strong anionic component, since the anionic component may make the cationic aminofunctional polydimethylsiloxane emulsion unstable.

The invention is capable of several modifications. Additional suction drum bowls can be installed to repeat the above-described processing steps to obtain a predetermined residence time in the treatment solution. It is also advisable to use an additional step of rinsing wool with water. For example, a rinse bowl can be placed between steps (i) and (ii), between steps (ii) and (iii) or between steps (iii) and (iv), which is one to three rinses The bowl can be easily combined in any combination. After treating the wool in a series of aqueous solutions, it is necessary to dry the wool before further processing. Wool is typically passed around the surface of a perforated cylindrical drum through which hot air is discharged. A two stage dryer can be used and a suction drum bowl can be placed between the two dryer stages. Step (iv) of the present invention can be carried out in a suction drum between two stages of the dryer. In other words, the wool can be dried between steps (iii) and (iv). The two-stage dryer is another variant of the invention, in which other materials which may be applied in step (iv) may be sprayed on the wool between the dryer stages.

Wool treated by the method of the present invention has a high degree of shrinkage as measured according to IWS TM31, soft touch and whiter than untreated wool as described above, and dyed in a similar manner to untreated wool [Hercosett] Unlike wool treated with a commercially available cationic polymer such as 250 (Hercules Incorporated)], dyed under pressure in the form of a saw without curing, and the dyed wool is dyed to have good friction fastness, and a fluff is formed. The tendency is reduced. From an environmental point of view, the process of the present invention does not release AOX during processing or during subsequent dyeing or post processing.

As used throughout this specification and claims, the terms “comprise” or “contained”, and the like, unless otherwise indicated, mean including specified integers or groups of integers, but excluding any other integers or groups of integers. It is not.

The following examples are provided to illustrate the invention and the invention is not limited thereto.

Washing test

Samples of treated wool slivers were spun with 2/71 tex yarns of 370 tpm single and 213 tpm double twist knit into flat knit specimens with a cover factor of 1.1. Samples were washed in a Worscater FOM 71MP machine according to International Wool Secretariat Test Method 31. Samples of 1 kg load and polyester extension squares were washed and relaxed in one 7A wash cycle, washed and washed in 5 5A wash cycles, and measured again to calculate the area shrinkage (abbreviated as AS). Area shrinkage above 10% is considered a failure (hereinafter referred to as F).

The following chemicals were used in the examples below.

A Alcopol 650 (aloid colloid), nonionic ethoxylate

Synperonic 10/6 (ICI), C ₁₃ to C ₁₅ alcohol ethoxylates with an average of 6 moles of ethylene oxide per unit alcohol

Lissapol 91/6 (ICI Australia), C ₉ -C ₁₁ alcohol ethoxylates with an average of 6 moles of ethylene oxide per unit alcohol

D Lisapol TN450 (ICI Australia), nonylphenol ethoxylate

Eoxone (Dupont), triple salt

F anhydrous sodium sulfite

Selbana 4611 (Henkel), wool processed and spun lubricant

Hacker CT 45e (Wanker Chemie), aminofunctional polydimethylsiloxane

JSM 8709 (Toray Dow Corning), Aminofunctional Polydimethylsiloxanes

K Hercosett 250 (Hercules Inc.), prepared by reaction of epichlorohydrin with aminofunctional polyamide

LJG4008A (Flexichem), Aminofunctional Polydimethylsiloxanes

MAR 4136A (Flexichem), Aminofunctional Polydimethylsiloxanes

Example 1

A web of wool 36 sliver having a fiber diameter of 21 microns, an average fiber length of 70 mm, a weight of 20 ktex from commer wool having a pH of 8 to 9 as a raw material, and a volume of 500 l And at an industrial plant equipped with six continuous suction drum bowls of perforated drums of 300 mm in diameter at a rate of 10 meters / minute. Each bowl was spaced apart from the next bowl by a hydraulically operated squeeze roller set at a compression rate of 50% and then passed through five drum dryers.

In each experiment, (i) chemicals were added to the bowls 2, 3, 4 and 6 to maintain the concentrations listed in the table below, and (ii) the temperature was measured using a heating coil with an automatically controlled temperature. Maintained at the indicated values, (iii) the starting solution was added to Bowl 1 at a rate of 6 liters per kg of dry wool entering the bowl, and (iv) Bowl 4 was added to a pH of 9.5 by adding 10% sodium carbonate solution. (Vi) Bowl 6 was maintained at pH 5.5 by addition of 10% acetic acid solution.

Experiment Bowl 1 Bowl 2 Bowl 3 Bowl 4 Bowl 5 Bowl 6 AS One A 5 g / l, 50 ° C E 40 g / l, 45 ° C E 40 g / l, 45 ° C F 40 g / l, 40 ° C Water 20 ℃ G 10 g / ℓ, H 10g / ℓ40 ℃ 3 2 radish Same as 1 Same as 1 Same as 1 Same as 1 Same as 1 F 3 radish E 40 g / L & A 0.5 g / L, 45 ° C Same as 1 Same as 1 Same as 1 Same as 1 F 4 radish E 40 g / L & A 5 g / L, 45 ° C Same as 1 Same as 1 Same as 1 Same as 1 F 5 A 2 g / l, 20 ° C Same as 1 Same as 1 Same as 1 Same as 1 Same as 1 F 6 A 5 g / l, 20 ° C Same as 1 Same as 1 Same as 1 Same as 1 Same as 1 F 7 A 5 g / ℓ, 40 ° C Same as 1 Same as 1 Same as 1 Same as 1 Same as 1 F 8 Same as 1 Same as 1 radish Same as 1 Same as 1 Same as 1 F 9 Same as 1 Same as 1 Same as 1 radish Same as 1 Same as 1 F 10 Same as 1 Same as 1 Same as 1 Same as 1 radish Same as 1 5 11 Same as 1 Same as 1 Same as 1 Same as 1 Same as 1 radish F 12 Same as 1 Same as 1 Same as 1 Same as 1 Same as 1 G 10 g / ℓ40 ℃ F 13 Same as 1 Same as 1 Same as 1 Same as 1 Same as 1 H 10 g / ℓ40 ℃ 3 14 Same as 1 Same as 1 Same as 1 Same as 1 Same as 1 J 10 g / ℓ40 ℃ 3 15 Same as 1 Same as 1 Same as 1 Same as 1 Same as 1 K 10 g / ℓ40 ℃ F 16 B 5 g / l, 50 ° C Same as 1 Same as 1 Same as 1 Same as 1 Same as 1 3 17 C 5 g / L, 50 ° C Same as 1 Same as 1 Same as 1 Same as 1 Same as 1 3 18 D 5 g / l, 50 ° C Same as 1 Same as 1 Same as 1 Same as 1 Same as 1 3 19 Same as 1 Same as 1 Same as 1 Same as 1 Same as 1 L 10 g / ℓ40 ℃ 5 20 Same as 1 Same as 1 Same as 1 Same as 1 Same as 1 M 10 g / ℓ40 ℃ 8

Experiments 1 to 4 show that the method of the present invention is superior to that in which the hydrating agent is initially not dispersed in a separate bowl, but is omitted or added to the PMS bowl. Experiments 5 to 7 show the importance of the preferred conditions in prerefining step 1, while experiments 16 to 18 show the use of other nonionic detergents in step (i). Experiments 8-11 show that the preshrinkability is lost in one of the omissions of PMS bowl, sulfite bowl or silicon. Experiments 12-14 show that the use of lubricant Selvana or 4611 is ineffective and other silicon may be used. Polymer Hucoset 250, widely used for chlorinated wool in Experiment 15, did not provide preshrinkability.

Example 2

This example used the same conditions as in Experiment 1 of Example 1 except that wool having a different fiber average diameter and / or sliver weight was treated at different linear velocities.

Experiment wool Sliver weight Linear velocity Remarks AS One 21 μ 20 ktex 10 m / min Same as Experiment 1 in Example 1 3 2 21 μ 20 ktex 12 m / min Same as Experiment 1 in Example 1 5 3 21 μ 30 ktex 10 m / min Same as Experiment 1 in Example 1 4 4 21 μ 40 ktex 10 m / min Same as Experiment 1 in Example 1 5 5 21 μ 20 ktex 10 m / min Use Fleissner separation pad chlorinating agent as bowl 1 instead of suction drum bowl, the remaining bowls are the same as Experiment 1 of Example 1 3 6 18 μ 20 ktex 8 m / min Same as Experiment 1 of this example, with 2 and 3 45 g / L D. Bowls 2 7 25 μ 20 ktex 10 m / min Same as Experiment 1 in Example 1 2 8 25 μ 40 ktex 10 m / min Same as Experiment 1 in Example 1 4 9 27 μ 20 ktex 10 m / min Same as Experiment 1 in Example 1 3

Example 3

This embodiment uses a two-stage dryer, not the one-stage dryer used in Example 1. Between the two stages, there is an additional suction drum bowl designated as bowl 7. In the following experiments, the bowls 1 to 5 were all the same as in Experiment 1 of Example 1.

Experiment Bowl 6 Bowl 7 Area shrinkage One water H 10 g / ℓ 40 ℃ 3 2 H 10 g / ℓ 40 ℃ G 10 g / ℓ 40 ℃ 3 3 H 10 g / ℓ 40 ℃ G 10 g / ℓ & A 0.1 g / ℓ40 ℃ 2

This example shows that the wool can be dried before the silicon is applied.

Those skilled in the art will recognize that the invention described herein may be modified and modified. Such variations and modifications fall within the spirit and scope of the present invention. In addition, the present invention encompasses all steps, features, compositions and compounds specifically or specifically referred to or referred to herein, either collectively or in combination with two or more of the steps or features.

Claims (19)

(i) continuous treatment of the web of wool sliver with a nonionic epoxidation detergent, (ii) continuously treating said web with monovalent persulfate or a salt thereof, (iii) continuously treating the web with a solution containing sulfite, and (iv) continuously treating the web with an emulsion, dispersion or microemulsion of aminofunctional polydimethylsiloxane. Method for continuously processing the web of wool slivers, characterized in that it comprises a sequence in each. The process of claim 1 wherein steps (i), (ii), (iii) and (iv) are each performed in one or more suction drum bowls. The method of claim 1, wherein steps (i), (ii), (iii) and (iv) each have a residence time of about 10 seconds to about 20 seconds. The method of claim 1, wherein the web of wool sliver is continuously treated at a speed exceeding 8 meters / minute. The method of claim 1, wherein the web of wool sliver is continuously processed at a rate of 10 to 12 meters / minute. The web of wool sliver according to claim 1, wherein the concentration of the treatment agent used in steps (i), (ii), (iii) and (iv) is maintained at a steady state by continuous addition of the treatment agent. How to deal. The method of claim 1, wherein the nonionic ethoxylated detergent is alkylene oxide, a derivative of fatty alcohol, or an alkylphenol. The method of claim 7, wherein the derivative of fatty alcohol has a C ₁₀ ~ C ₂₀ or a mixture thereof, the derivative of alkylphenol comprises a C ₇ ~ C ₁₂ alkyl group reacted with 5 to 15 moles of ethylene oxide. Method for continuous processing of webs of wool slivers. The method of claim 1, wherein the monovalent persulfate or salt thereof is present in aqueous solution. 10. The method of claim 9, wherein the aqueous solution is obtained by dissolving triple salt 2KHSO ₅ KHSO ₄ K ₂ SO ₄ in water, the solution of triple salt being a monovalent excess adjusted to pH 2 using a solution of pure monovalent persulfate or sulfuric acid. A method of continuously processing a web of wool slivers, wherein the monovalent persulfate is substituted by a solution of sodium salt of sulfuric acid, wherein the monovalent persulfate is prepared by reacting hydrogen peroxide with sulfuric acid. 10. The method of claim 9, wherein the concentration range of the solution of monovalent persulfate or salt thereof is 20 to 60 g / l in water and the temperature is 20 to 60 ° C. According to claim 1, The sulfurous acid solution is selected from the group consisting of sodium sulfite solution, potassium sulfite solution or sodium bisulfite solution, sodium metabis sulfite or sulfur dioxide adjusted to pH 8 to 10 using an alkali. How to continuously process burr webs. The method of claim 1, wherein the sulfite solution contains sodium sulfite. The web of wool sliver of claim 1, wherein the aminofunctional polydimethylsiloxane comprises a linear or branched backbone, and the aminofunctional groups are clustered or randomly distributed along the polydimethylsiloxane backbone. How to process consecutively. The method of claim 1, wherein the aminofunctional polydimethylsiloxane has a concentration range of 2 to 20 g / l. The method of claim 1, wherein the aminofunctional polydimethylsiloxane has a concentration range of 5 to 15 g / l. The method of claim 1, wherein the aminofunctional polydimethylsiloxane is maintained at a pH range of 4-7. A web of wool slivers treated according to the method of claim 1. Preshrunk wool treated according to the treatment method according to claim 1.