DD145412A5 - METHOD AND DEVICE FOR SPRAYING TEXTILE FLUID SURFACES - Google Patents

Description

12 501 56

Method and device for spraying fabrics

The invention relates to a method for spraying fabrics with liquids and to an apparatus for carrying out the method.

The invention is preferably for applying binders, plasticizers, stiffening, solvents and like substances in droplet form to a fibrous layer, eg a batt or a non-woven fabric, for producing Honwovens or other semi-finished product of a fabric or for a final product. Web ,. Maschen-, Y / irkwebware or ein.anderen textile sheet structure determines and is particularly suitable for textile finishing for applying Beuch-, bleaching, mercerizing, dyeing, etc. fleets and for the final finishing of textiles c / crease resistance and Schrumpfestausrüstungen. ₅ Shape stabilization, dirt-repellent equipment,

- 2

Hydrophilizing, antistatic, bactericidal and the like Equipments,. ...

Characteristic of the known technical solutions:

The previously known devices of this type work generally with spray nozzles or rotatable brush rollers.

According to the first-mentioned, mostly used version, the liquid in the nozzles is divided into small droplets by means of appropriate air pressure. The nozzles are either stationary or movable, i. arranged for example on a mobile or rotatable support. The device must be housed in a special housing and requires for its operation a whole range of ancillary equipment such as compressors, pressure vessels, filtering and suction equipment and / or the like. The disadvantage of this device is that it does not meet all technological requirements. Thus, for example, the outflow velocity of the liquid to be sprayed is sometimes so high that it can not be applied to fiber structures of relatively low basis weight.

The application of the liquid takes place in the form of sheet-like figures, e.g. oval or circular, with the liquid concentrated in the middle of these figures, and decreasing towards the periphery. Such unevenness must be compensated for by a special arrangement of the nozzles or their movement. During the actual spraying process, high losses of liquid are produced by misting into the surrounding atmosphere, of which in particular the edge parts of the fabric are affected. In addition, the cleaning of the entire plant as well as liquid-conducting parts of the drying solid liquid components is expensive

~ 3- 215: 07

and time consuming. Also, the operational reliability and economy of such a device is adversely affected by the precipitation or drying of the solid Plüsigkeitsteiles in the nozzles.

Those with a ge as a rotating brush st old et e;: <Be spattering operating systems are better suited for these purposes.

Such a device operates on the following principle:

The treatment liquid contained in a container is received on the surface of a roller partially submerged in the liquid. This roller is associated with a rotatable brush roller, the bristles of which remove the liquid from the surface of the fountain roller and apply it in the form of small droplets on the advancing path of a sheet to be treated. A major shortcoming of this device is the gradual clogging of the bristles, which can lead to sticking. This inevitably changes the amount and size of the liquid particles to be applied. The cleaning of the brush roller is difficult and impossible with certain highly viscous and poorly soluble liquids, so that the bristle covering must be replaced. This increases operating costs while decreasing manufacturing quality and treatment line capacity »

Object of the invention :,

By the invention, the identified deficiencies are eliminated and proposed a solution that ensures a uniform distribution of the liquid particles over the entire width of the sheet. there

-4- 21 5 0 79

It is possible not only the amount but also the size of the liquid particles to be applied in a wide range to regulate.

ParleyUn ^ _{111 of} the essence, the invention :,

The invention has for its object to provide a "method for spraying fabrics with liquids, which sschicht a fine and uniform liquid even on fine, easily destructible fabric allows to apply ·

Likewise, the invention has for its object to provide a device which makes it possible to apply different types of treatment liquids in uniform amounts and particle sizes and with minimal energy requirements using a Besprühtechnik.

Erfindungsgeinäß the object is achieved in that the liquid is supplied to the surface of Besprühwalze in the form of a film, which divides due to rotation of Besprühwalze in liquid particles.

The invention also provides an apparatus for carrying out the method, which is characterized in that the spraying roller for supplying the liquid to be applied in the form of a liquid film is associated with a contact device contactless.

The surface of the spray roller may be smooth or provided with a relief pattern. Alternatively, such a relief pattern is provided either on the spray roller or on the applicator roll. To concentrate the liquid particles into a single stream and to divide it also serves the inner surface of a hood whose distance from the Besprühwalze in the direction of rotation

- 5 -

η ! J si ι η ο ο. ο * '· ^r ? f, α Π

gradually expanded and greatest in the area of the spray zone * The applicator can be either a roller or an overflow surface. For working with media which require a certain temperature, the spraying roller, the application device and the reservoir for the liquid to be applied can be provided with heating elements.

The advantage of the method and the device according to the invention is that a stream of liquid particles is generated by the action of the rotation caused by rotation of the Besprühwalze inertia forces on a by adhesion via the contactless dipping roller or by overflow onto the surface of the Besprühwalze supplied liquid film, the amount , Size or fineness of the particles and the Abspritzrichtung are adjustable to achieve a guns term as possible and effective order process; is _; the device is constructed so that, for example, the size of the squirting. Particles, the amount, the direction, etc. can be set exactly. Thus, at least a part of the rebounding surface surrounding the spraying roller, the rebounding plate, which influences the direction of the spraying particles, and the distance between the spraying and the applicator device are made adjustable. In this way, the apparatus according to the invention can be used for various technological purposes and adapted to the fabric to be sprayed and the liquid to be applied in each case The individual components of the apparatus are not subject to great wear, so that the apparatus operates without interference and Since the device is constantly working with a wet medium, it can not interfere with the drying of liquid components during operation, but if this happens, the parts of the device may be subject to chemical or mechanical deterioration

Agents are easily cleaned. The apparatus also allows the application of melting, under the condition of the installation of heating devices.

When using the device according to the invention in the field of textile finishing for applying Auskoch-, bleaching j Mercerisier-, dyeing and other fleets and in the field of final finishing of textiles their main advantage is to reduce the cost, drying and Kondensierkapazitäten, steam, water , electrical energy, chemicals, dyes and textile, tools can be saved.

Ausführungabeispiel:

The invention will be explained in more detail below using an exemplary embodiment. In the attached drawings:

1 is a side view of an embodiment of the device in section,

Fig. 2: another embodiment in which a liquid film is applied by means of an overflow surface on the working surface of Besprühwalze ». '. ·.'

3i, the view of an alternative '. Execution,

Fig. 4s shows an embodiment in which the applicator roll and the spray roller are the same! Have directions of rotation.

mm 7 -

· 5: Detailed views of both rolls, which are set up to 7: with different form-fitting relief patterns.

Like from Pig. 1, the device consists of two oppositely rotatably mounted rollers, a Besprühwalze 1 and an applicator roll 2, which are arranged with their working surfaces 3, 4 contactless and adjustable to each other. The rollers 1 and 2 are surrounded by a hood 5, on whose inner surface 6, the particles 7 of a liquid 8 which depart from the working surface 3 of the spraying roller 1 as a result of the inertial forces caused by the rotation rebound or splinter. The inner surface of the hood 5 is formed so that in the rotational direction of the Besprühwalze 1 their distance to the working surface 3 of the roller to the region of the ejection opening 9 is gradually increased and formed by the ejection opening 9 limited space 10. The injection orifice 9 is provided with an adjustably arranged calf 11 to regulate the direction of flight of the particles 12 to be sprayed and applied. Opposite the entry of the roller in a reservoir 8 containing the liquid 8, the ejection opening 9 is partially covered by a turnable arranged Aevi baffle 14.

As mentioned above, the applicator roller 2 partially immersed in the liquid 8 in the reservoir 13, the liquid 8 adheres due to adhesion on the working surface 4 of the applicator roll 2 and is then taken over in the region of a joint 16 in FoTra of a liquid film 17 of the spraying roller 1 or transferred to the same. Due to the rotation of the spray roller 1 and the inertial forces inherent in the liquid film, the film 17 dissolves and the liquid 8 injects into shape

from regularly applied particles 12 from. In the event that the liquid to be applied is a melt, the rollers 1 and 2 and the reservoir 13 are equipped with heating elements 18.

The embodiment of the device according to the invention shown in FIG. 2 corresponds to FIG. essentially the embodiment shown in Fig. 1. It also consists of the Besprühwalze 1, the applicator roll, 2, the hood 51 of the ejection opening 9 and your reservoir 13 with the liquid eighth

The two Y / alzen 1 and 2 rotate in opposite directions, so that the liquid 8 is taken in the form of a film 17 over a small portion on the working surface 3 of the spray roller 1 to the injection orifice 9, where the ejecting particles partially from a roof-shaped, to the adjustable baffle 11 bouncing rebound and splinter plate 13 rebounded. "Below the rebound and splitter plate 19, a drip tube 20 is arranged, while the underlying wall of the Yorktats 13 is bent out so that an oblique T, eil 11 is formed.

The embodiment shown in Fig. 3 differs essentially from the preceding by the use of a tJberlauffläche 22, via the edge 23, the liquid 8 flows freely from the reservoir 24 to Besprühwalze 1, wherein the reservoir 24 is arranged on the opposite side to the injection opening ,

In this embodiment, the application roller 2 is omitted, since the liquid 8 is supplied in the form of a film 15 on the inclined surface 22 on the working surface 3 of the Besprühwalze 1 and is received by this in the form of a film 17. The hood 5 is this

adapted leadership and equipped with a corresponding bounce and splinter wall 25 »wherein the distance of the hood in the direction of the ejection opening 9 of the working surface 3 of the spray roller 1 gradually increases. The work surface 3 is a rebound plate 14 is arranged, which serves for directing the liquid particles to be applied against the fabric. For collecting the ejecting particles, the device has a collecting vessel 26. This embodiment is again provided with heating elements 18.

4 shows a detailed view of a device which has a modified transfer of the liquid 8 from the co-rotating discharge roller 2 onto the spray roller 1. The liquid film 17 is transferred from the applicator roller 2 to the spraying roller 1 without passing through the precisely set joint 16 between both rollers, and then discharges from the working surface 3 of the roller 1 similarly as in the foregoing examples.

In FIGS. 5 to 7, different shapes of the form-fitting interlocking contours of the working surfaces 3 and 4 of the spraying and application roller 1 and 2 are shown. Thus, Fig. 5 shows a triangular-shaped, Fig. 6 is a semi-circular and Fig. 7 shows a quadrangular relief pattern. Of course, the relief patterns may also have other configurations.

Of course, the above-mentioned embodiments do not include all possible embodiments and modifications of the device according to the invention, as can be found, for example, in the field of finishing and final finishes of textiles. The invention can be used advantageously in all systems

- 10 -

where landforms are propagated in a propagated state, such as e.g. in decoction machines, bleaching plants, dyeing machines, dryers, clamping or fixing devices. The corresponding machines can be upstream or downstream or installed in such systems. .. · '..

The device according to Fig. 1 operates as follows:

The spray roller 1 rotates about its longitudinal axis and adopts by adhesion to its working surface 3 a liquid film 17 of the applicator roller 2. The working fluid is in turn due to adhesion from the working surface 4 of the rotating, immersed in the liquid 8 in the reservoir 13 application roller 2 in the form a liquid film 15 recorded.

The inertial forces acting on the film 17 rupture it, hurling the resulting Partilei 7 of liquid 8 against the inner surface 6 of the hood 5, where they are further divided and through the gap 10 between the inner surface 6 of the hood 5 and the work surface. 3 the Besprühwalze 1 to the rebound plate 14 and the adjustable aperture U go through. In the area of the two last-mentioned elements, a directing and a further splitting of the liquid particles takes place from the film 17 to particles 12.

The amount, size and weight of the particles 12 to be applied can be determined by the thickness of the film 15 on the working surface 4 of the applicator roll 2, by the peripheral speed of the applicator roll 2, by the viscosity and the adhesion of the liquid 8, by the peripheral speed of the working surface 3 the Besprühwalze 1, by the size of the joint 16, the diameters of the spray and application rollers 1, 2, through the

Τίλ-S. U-AV

Length of the enclosure of the working surface 3, by the hood 5 _} the angle and the length of the rebound plate 14 and influenced by the adjustable aperture 11 or be adjusted. The effectiveness of the device can moreover be increased by a suitable design of the two working surfaces 3 and 4 according to FIGS. 5, 6 and 7.

The difference in the operation of the device according to FIG. 2 in relation to the creek FIG. 1 consists only in a modified centrifuging of the particles 12 to be applied from the working surface 3 of the spraying roller 1, in a much shorter path.

The difference between the device of Fig. 3 and that of Fig. 1 consists in the manner of forming the liquid film by means of an overflow surface 22 and the transfer of the film 15 to the working surface 3 of the spraying roller 1. About the stationary or vibrating overflow surface .-22, the liquid 8 flows in the form of a film 15 to the working surface 3 of the spraying roller 1. The film 17 formed on the working surface 3 is in turn dissolved in the particle 12 as in FIG.

The difference between the embodiment according to FIG. 4 and the embodiments shown in FIGS . 1 and 2 is that in the former the two Y / alts 1 and 2 have the same direction of rotation, so that the film 15 taken up by the application roller 2 is directly transferred to the surface 3 of the Bespruhwalze 1, ie that he is not through the joint Io between the rollers 1; 2 goes through.

The device according to the invention can - depending on its execution - for the application of various fIls siger treatment agent such as binders or solvents for

^a ^ WJ. * A- * " WV \ s> ** If-IV ^, * _ / .J _n f. K ** &. VV Xi i. J- VU \ s JU. W4. \ ~ «J_ -Wt ^ kJ tAl ^ k

-12 -

Manufacture of Ubonwovens, for Hachbefeüchten, to surface finishes, padding, backseat of Polwaren, carpets, in finishing technologies and final equipment of textiles ο ♦ the like, as mentioned above, are used. It can be applied in this way, the liquid in question evenly on fabrics with low basis weight as carding without danger of damage.

A cotton or cotton fiber felt fabricated on a card was conveyed on a conveyor to the side walls of the sprayer in the embodiment of FIG. Here, the transporter ended and the batt was led without tension through the application zone and delivered to a drying plant.

In the area of the application zone, substantially random small binder particles adhered to the fiber structure, which adhered to its surface and partially penetrated into the interior of the fiber structure. After drying, the binder formed binding points at particle incidence sites.

The binder used was an alcylate or other dispersion of plastic materials with 10 to 20% solids content.

The fiber material consisted of viscose rayon or polyester fibers, denier 1.6 - 7.2 dtex, cut length 32 - 80 mm.

Total weight of the stiffened

Formed 5-20 g / m ²

Fiber content 75 90 %

Percentage of binder dry content 25 - 10 %

- 13 -

-a-. 21 5 0 79

Rotational speed of the spray roller ·

(0 200 mm) .1 300 U./Min.

Rotational speed of the applicator roll

(0 150mm) '50 - 100 U./Min.

Intermediate roller plow width 0.2 mm

Withdrawal speed of the batt .19 - 30 m / min,

The fibrous web treated in this way can be used as a pre-stiffened nonwoven fabric to be processed on stitchbonding machines of fine pitches or, after stacking two to ten layers and compressing as a semi-finished product, to produce Yerbund nonwovens.

B EISP iel 2

The production of heat-insulating and FiXtrier-Uon- ^': wovens was made in the following way "

A fibrous web produced from polyester fibers (3 × 9 dtex, cut length 57 mm) and provided with acrylate binder (25 %) according to Example 1 was wound up after being deposited on an endless conveyor belt of a jet drying system for 5 to 20 turns Air, the upper batt layer was printed against the lower layers, with the binder partly penetrating from the upper to the lower layers, so that they came together.

After winding a required number of layers of the winding was cut under gear and rolled up. The subsequent winding cycle continued in the meantime without interruption. The nonwoven fabric was characterized by a uniform distribution of: Bindemitteis in all directions, in particular in thickness. ·

This technology is especially suitable for the production of higher basis weight products. For lighter products, the stacking of fibrous webs after spraying is still preferred before entering the dryer. The cards and the spraying device are coupled together in this case as a tandem unit. The final product can be used as a heat-insulating insert or as an air or liquid filter.

Example _i β

For the production of cigarette filters, a viscose staple fiber batt (7.2 tdex, 90 mm cut length, 9. g / m ² basis weight, 1.0 m width) was coated with 0.5% carboxymethylcellulose 1.5% solution g dry content to provide. After spraying the fiber web 3 in the expanded state (100 cm), it was compacted by means of a ring (10 mm inner width) into a strand. After drying, a flexible bonded sliver (10.5 g / m length weight, 0 20 mm) was obtained, which was excellently suitable for the stated purpose.

Example 4 '

With pile or pile fabric made by needling, tufting or similar technique, it is sometimes necessary to secure the pile loops against withdrawal.

The conventional impregnating or knife coating techniques Verwendung.von dispersed binders influenced to a considerable degree the character of ^v production and were unsuitable where the goods had to have a typical textile Gesohmeüigkeit even after the post-treatment in the cases. In such cases, the

- ve - 21

Advantageously, the device according to the invention can be used advantageously, since it is capable of adequately securing the poles or pile loops against being pulled out by applying 6 to 10 g / m binder in small particle size porra. The device can be without special. · Difficulties to be installed in front of a drying unit or a tenter frame.

Example 5

In a crease resistant equipment, a cotton weave (100 % cotton, M II worsted yarn in warp and weft, tex _K / tex _s = 14.5 / 22, warp 375 / dm, weft raw 240 / dm) was singed on a singeing machine, in roll form desized, washed wide and boiled on a suitable plant. After acidification and mercerization, the product was bleached on this unit and then dried on a tray at 110 ° C.

The woven fabric pretreated in this way was subsequently sprayed on the device according to the invention with a liquor of the following composition:

250 g / l dimethylolurea

3 g / l softened Polyvinylazetatdispersion 1 g / l quaternary SiLze a condensation product of stearic acid with alkylolamines 0, l-0j2 g / l condensation product of fatty acids with

Diethanolamine 1.0 g / l Urea 3 »5 g / l Magnesium chloride

Temperature of the liquor to be applied 30 ^° C. Temperature during subsequent drying

the drying and tentering frame '100 - 110 C

Linger about 24 hours

optimal 3 days

Condensation 'e.g. in Thermo Photoshoot:

Throughput speed 12 m / min.

Duration of treatment 5 min.

Temperature in the sub-chamber 150 ⁰ C.

Temperature in the upper chamber - 145 C finally -V / a sch process in Poulard at 500C and afterwards JOOLARDIER in cold condition throughput speed 40 m / min.

After drying on the drying and tentering frame, sanforization is preferred. Pinal process: measuring and adjusting

The so refined woven fabric is particularly suitable as shirt and women's clothing f. the production being very economical compared to conventional padding.

Example 6

Antistatic equipment and lightening of lloewovens, e.g. a multilayer ITähwirkstoffes the following material composition:

Yorware: Chain - Polyamide silk, textured

60/16

Weft - polyester fiber / cotton 65/35, IM 40/2

Non-woven fabric: Viscose fiber 3.5 den./60 mm Tying material: Polyamide silk 200/32 Total weight per unit area: 300 g / m;

The nonwoven textile was washed in the spread state and pre-dried on a contact heat dryer up to 30% residual moisture. It was subsequently dried on a dry, stretch and pixie installation at a

'Throughput rate of 40 to 45 m / min, and dried with a little more than 6% pre-set. Then it was printed on an automatic screen printing machine with rotary stencil and washed after steaming in suspension in a 10-skid Breitwaschinaschine. Before the antistatic plasticizing, the goods were last dried with contact heat.

The product pretreated and printed in this way is then sprayed in the device according to the invention with the liquor of the following composition:

4-5 g / 1 acetate of a condensation product of stearic acid with Aothanolaminen in the form of 30 Jaiger paste

pH 5j5 treatment with acetic acid as buffer

Thereafter, the textile was dried on a drying and tenter at a temperature of 110 to 120 ⁰ C and with set 5 4iger advance.

The thus printed, antistatic and softened multi-layer composite is suitable as upholstery fabric whose production - thanks to the finishing process according to the invention - is more economical.

Example 7

Peroxide bleaching and optical brightening of knitted fabrics was done so that the knitted fabric of the subsequent material composition

Chain - 65/35 polyester fiber / cotton weft - cotton M II combed

was singed, desized and washed wide in a batch or continuous plant. On-

- 18 -

FROM

21 5 079

closing it was at 110 - 12O ⁰ C in a dry system or contact heat on a dry, and tenter dried Then, the thus pretreated Wirkwebware in the inventive "apparatus was sprayed with the liquor of the following composition:

27 ml / 1 30% hydrogen peroxide

27 ml / l water glass

3 ml / 1 alkyl polyglycol ether

pH 12 3O ⁰ Be sodium hydroxide solution as buffer

2.5-5.6 g / l optical brightener

Temperature of the liquor to be applied: 60 C

The treated Wirkwebware .wurde at 98 ⁰ C for letting in a reaction chamber, then washed wide and dried at 110 120 ° C on a dry and tenter. Lastly, she would be measured and adjusted.

After bleaching, it can be used as a shirt fabric or light coat fabric.

Example .8

For a two-pad log-steaming process, a 7 / ebware was used with the following parameters:

Bindings: atlas with additional chain: 100 % cotton M III, combed, order 68/2,

raw 400 / dm shot: 100 % cotton M III, combed, order 68/2 * \

raw 260 / dm

In the first technological phase, it was pretreated and bleached according to the procedure described in Example 5.

»3

η- 21 5 0 79

After bleaching, it was dyed by spraying in the device according to the invention with a dyeing liquor of the following composition:

xxx g / l Ostazine H-Paraben 20 - 80 g / l urea

5 - 10 g / l Natriüinmetäni ^ trobensolsulfonat Besprühflotte temperature of 20 - 8O ⁰ C

Έθ followed by an intermediate drying process at 90 to 100 ⁰ C.

The product was then sprayed with a chemical liquor of the following composition:

330-350 g / l sodium chloride 30-40 ml / l sodium hydroxide 38 ⁰ Be

Liquor temperature / 2O ⁰ C

Ea was followed by 33-60 second steaming in a steamer with saturated steam at 102 - 105 ° C.

In some cases, the temperature of the drying to increase to 120 ⁰ C.

Finally, the goods could be handled on a reel (1:20 liquor ratio), in a continuous wide washing machine, preferably also in a jigger (1: 5 liquor ratio) using the following procedure:

1st to 2nd passage 2inal cold water 20 - 25 ° C 3 to 6 «Passage 4 times hot water 70 - 80oC 7th to 8th passage 4 g / l Zetyl.oleiyfsulfat boil 9 ~ BISO. Passage Rinse - hot water 40 - 50 ⁰ C

Unwinding - cold water 20 - 25 C

~ 20 -

This was followed by drying in contact heat plants or on a drying and tentering frame. After leaching, the goods were checked, measured and adjusted.

The advantage of this finishing of the goods, which is suitable as women's clothing or shirt fabric, consists in reduced consumption of dyes and textile auxiliaries,

Claims (9)

invention claim Anspruch [en] A process for spraying fabrics, in particular textile webs, with particles of a liquid using a spraying roller associated with a means for applying the liquid, wherein the constituent liquid particles are directed against the fabric, characterized in that the liquid - Speed of the surface of the spray roller is supplied in the form of a film, which transforms due to rotation of the spray roller in liquid particles. 2. Device for carrying out the method according to item 1, provided with the Besprühwalze and the associated applicator means, further comprising a Besprühwalze the enveloping hood and a diaphragm for directing the forming liquid particles against the sheet, characterized in that the Besprühwalze (1) the order means (2, 22) for Zulierfern the liquid (8) in the form of a film of Besprühwalze (1) is associated without contact. 3 · Device according to item 2, characterized in that the working surface (3) of the spraying roller (1) is smooth. 4. The device according to item 2, characterized in that the working surface (3) of the besp.rühwalze (l) is provided with a relief pattern. 5. The device according to item 2, characterized in that at least one of the working surfaces (3; 4) of the spray roller (1) and the application means (2) is provided with a relief pattern. 6. The device according to item 2, characterized in that the Besprühwalze (l) at least partially by a hood (5) is enveloped, the inner surface (6) forms a rebound or splinter surface. 7. The device according to item 6, characterized in that the intermediate space (10) between the inner surface (6) of the hood (5) - and the working surface (3) of the Besprühwalze (1) increases in the direction of rotation of Besprühwalze. 8. The device according to item 2, characterized in that the application means is an overflow surface (22). 9. The device according to item 2, characterized in that the spray roller (1), the application means (2; 22) and the application means (2; 22) associated reservoir (13; 24) of the liquid (8) with remedies (18) are provided. For this _._ 3 .. "pages drawings