DE2306874A1 - CONTINUOUS PROCESS TO INCREASE THE FLEXIBILITY OF A PLASTIC FLEECE ROLL AND DEVICE FOR IMPLEMENTING THE PROCESS - Google Patents

Description

Patent attorney Dipl.-Ing. H. Wangemann 4M ₌ * j ₌ td «3. z. 1973 DrwriMT Unk, Ot-HtI, Kto. 91-41 * MS Nrwvf MU 11

KMiMMIl

My file No. 4791a W / B, -

Klelnevefers Industrie-Companie GmbH., Krefeld _t Kleinevefers-Kalanderstraße

ⁿ Continuous process to increase the flexibility of a web of plastic fleece and a device for carrying out the process ^w »

The invention relates to a continuous process for increasing the flexibility of a web of compacted material paper-like synthetic fleece and a device for carrying out this method.

It is a plastic fleece made of compressed, tearable Plastic known that has paper-like appearance and has the rigidity of paper. Such plastic. Fleece or sheets are used, for example, for tear-resistant envelopes. This known synthetic fleece has besides Its tensile strength has the advantage of being moisture- and water-resistant as well as air-permeable and thus in this relationship to have the properties of textiles.Furthermore, this synthetic fleece is largely washable, water-repellent and non-absorbent. It would be excellently suited for extended areas of application if it weren't for one Would have rigidity that precludes application in these extended areas.

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The object of the invention is therefore to give such a compressed synthetic fleece a textile-like character by means of a special process without losing any of its advantageous properties, ie in a continuous manner. The flexibility of the fleece is to be increased in such a way that the paper-stiff synthetic fleece is given the soft, flexible character of textiles. This should make it possible to apply the nonwoven made of compacted plastic to items of clothing. For example, to include protective clothing, but also tents, bed linen and, in particular, technical fabrics. The method is intended to in no way reduce the advantageous properties of the synthetic fleece, for example its wash resistance, its water-repellent property, its air permeability, or its non-absorbency. Ultimately, the method should be able to be carried out in such an economical manner that only a fraction of the costs for the production of the compressed plastic have to be raised in order to achieve the soft, flexible character of the material web or the fleece.

To achieve this object, the invention provides, in a continuous process of the type described at the outset, that the web of material is guided in its longitudinal and transverse direction in an undulating manner between comb-like interlocking rows of pointed needles that are close together. The concept of the invention underlying is the "softening ¹¹ or increase the flexibility of paper-like plastic webs in continuous ^T .veise by a continuous

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Tjiicken the web in the longitudinal and transverse direction of the. to accomplish goods train over pointed needles. Bs has been found that the wave-shaped deformation of the paper web "softness brings with it that the Viarenbahn paper loses its rigid character and a textile" over top of such needles obtained ^r Aich unit.

In an advantageous further embodiment of the method according to the invention it is provided that the v / arenbahn through the ¥ alzenenspalte several equipped with needles in the training direction of the 'The web of rollers arranged one behind the other is guided. Are, as will be described below, the needles of the "Jalzen" arranged so that they are on top of the web as well as on the underside of the web always results in changing needle points of contact with the ivaren web in its longitudinal and transverse direction, so obtained the v / arenbahn over its entire extent the desired '.veichlieit.

Wheel rollers and their use are known in other technical fields, for example in carding and shredding machines. There they are used to destroy or bringing out fibers from a fiber structure, but not the ~: Ie ichmachen stiffer paper sheets or the like.

Instead of being guided through the roller ^{gap, the T} , arena track can also be guided by several pairs of belts made up of short, synchronously driven, parallel conveyor belts with needles.

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In a further embodiment of the method according to the invention, the web of material can before passing through between the needles of the ¥ alzen or the bands one the flexibility of the plastic degrading liquid chemical treatment and in the state in which the treating agent has decreased flexibility, between the! rebukes of! the! folds or straps.

In the method according to the invention, the Viarenbahn is without a train on the web at the exit point from the Nip or the edge pair was exercised, loosely on the needles in the nip or belt gap.

The device for carrying out the method provides that the needles of the rollers or belts are arranged in rows, where the circumferential and longitudinal directions are consecutive Rows of needles on a roller or a belt by half the distance two needles in a row are offset from one another.

Furthermore, the device provides nach.der invention that the roller axes of a roller pair, horizontal or vertical by one to five times the distance and / or a fraction of the Distance between two adjacent needles one needle width in The transport direction of the web are offset from one another. . The nips can be arranged horizontally one behind the other or be provided vertically one behind the other ..

The distance between two consecutive ones on the same side of the

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Furthermore, rollers located on the web can be a multiple plus a fraction of the spacing between two adjacent needles in a row of needles on a roller. This results in a displacement of the points of the needles of successive Ifalzenpaare on the web, whereby a constant change of the break points on the ^"r arenbahn is given, - The same Zveck serves the further feature of the invention that the located in the circumferential direction of the needle rows of two adjacent .alzen to one side of the web or these rollers themselves are axially offset from one another by a fraction of the distance between two needles of these rows of needles. As a result, different points of attack of the needles on the fabric web are created in the transverse direction of the fabric tree, so that during the continuous treatment of the fabric web by the on both sides, ie the top and bottom of the rare web. attacking needles, the points of attack and thus the kinks of the "web change.

According to a further possible embodiment of the device according to the invention, several needle rollers are a larger one Associated needle roller, the web is passed between the large needle roller and the small roller. the v / 'arenbahn can also be guided in a known manner by mutually adjustable pairs of rollers, so that the comb-like The depth of engagement of the needles of a pair of rollers can be varied> can. The './rollers of a pair of rollers' can also run in the direction of travel of the web be offset from one another.

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It is of particular advantage for handling the "arenbahn" if the needles or the needle tips are in the di ^ direction of the Valze are directed. Here the needle point penetrates slightly- " If it fits into the surface of the material web, the material web kinks to give it a cellular shape between the rollers of a pair of rollers To give the course, and at the same time transports the web. As the web runs into the Nip with the riadein, there is a contraction of the Web to the waveform described.

The needles or needle tips preferably have an incline

by
from 1-20 to a / the needle root point laid radial plane. '

It is also advantageous if the distance between two adjacent Needles in a row of rollers located in the longitudinal or circumferential direction of the rollers amounts to 2-6 mm. The distance of the Needles as well as the transport speed of the material web, which is between 50-300 m / min, as well as the position of the needles or needle points opposite the radial plane depends on the type of web to be treated and its thickness. It can the position of the needles or needle tips, the distance between the needles in a row of needles and the transport speed can be varied within the specified limits.

The method and embodiments according to the application are shown in the drawing the device for carrying out the same explained in more detail and that shows

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.7i ^ ;. 1 üac "inc-urc ^ drive the" goods train through the ".v'alzenspalt

several pairs of needle rollers, l'i, \. 2 two pairs of bands, one behind the other, made of parallel

Conveyor belts with T needles,
Fi _; j. ~, on a larger ± "scale, the passage of a cross-section of web through the .." roll nip with needles,

FIG. K shows the tip of a needle in single engagement with the material web, FIG. 5 shows the position of a needle in relation to the through the

Iladial plane going through the needle foot point, Tig. 6 the row-wise arrangement of the needles in the circumferential direction or axial direction - when unrolled in the plane of the drawing

Circumference of an ¥ alze or a band side, Fig. 7 a further Ausfülirungsform a ¥ alzenpaares, in which the axes of both ^v . ^r alzen in the conveying direction of the

Web are offset from one another and FIG. 3 shows a possible embodiment of the device in which a number of smaller needle rollers are assigned to a large needle roller.

The method according to the invention provides for a .. arenbalm r to be carried out. ^r through the nip of several horizontally one behind the other pairs of needle rollers I, II, III ..... VII, VIII. Each of these VJalzenpaare has a YaIze 1 and a counter roller 2, which are arranged axially parallel. The axes 3, 4 of the folds 1, 2 can, as shown in FIG. 1, lie vertically one above the other when the beam is guided horizontally or, as shown in FIG. 7, by the dimension e in the transport direction

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of the web ¥ be offset from one another. The extent of this offset can be a certain amount, which is stated below is explained in more detail, make up.

'Each of the vvalzen 1, 2, which in horizontal succession the roller gap 5 between the rollers 1, 2 individually or in pairs in the direction of the arrows 6 (Fig. 3) against each other or are adjustable away from each other, carry needles 7 on their circumference, which, as FIG. 5 shows, an inclination with respect to one through have the base point of the needle going radial plane 8, with an angle cxTvon between this radial plane and the needle 1-20 ° is included. The needles are inclined in the direction of rotation of the vialze T, 2, which is symbolized by the arrow 9 will.

The needles 7 are either straight and have the inclination described above with respect to the radial plane 8 or, as shown in FIG. 4, they are partial curved, with the foot 10 of the needle 7 in the radial plane 8 is or is located approximately in this plane and the needle head 11 is angled so that it takes the direction which occupy the straight needles 7 in FIG.

The head of the needles 7 is pointed in such a way that the point slightly, as at 12 in FIG. 4, into the plastic material web penetrates. The synchronously driven rollers 1,2 take the material web in the direction of the arrow 13 without slipping (Fig. 1 and 3) with, whereby the Uarenbahn ¥ at the level of the comb-like interlocking

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_D T "ifenden needles 7 of the two folding 1.2, as shown in FIG. 3 is clearly visible, is bent wave-shaped. The position of the! Blame on the circumference of the rollers 1,2, a Abnahne results in the spacing of the chimney interdigitated needles two "· fold 1,2 in the direction of rotation up to the level of the common plane S going through the ./ellenachsen 3,4, while in the running direction of the web behind the plane Ξ this distance increases again and thus the corrugations of the web of material are smoothed. For example, the distance between the tip of the needle 7a of the roller 1 and the needle 7b of the roller 2 is greater than the distance between the needle 7c and the needle 7d, while the distance between the needle 7e and the needle 7f is again greater. This means that, for example, the shaft 15 is larger than the shaft 15a, which in turn is smaller than the shaft 15b.

Since the penetration depth of the needles 7 of a roller in the gap zvfi see the needles of the other roller Pair of whales with the reduction of the distance described above the needles grows, the wave height of the paper web also increases with increasing approach to the common roller plane E, while it decreases with increasing distance from this plane. This means that at level Ξ the material line experiences the sharpest kink »

According to the depth of engagement of the needles 7 in the spaces between the needles of the other roller of the Pair of rollers, the effect of the method can vary four.

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Around the points of application of the needles of the "..- roller pairs 1,11, III ......

VII, VIII to vary the web of material, ie ^{to let the needles of the "fold this T} :." Roll pairs attack at different points in the longitudinal direction of the web, the distance a (Fig. 1) between the successive pairs of rolls is chosen so, that it is a multiple of the distance υ (Fig. 3) between two consecutive needles 7 of a row of needles located in the circumferential ring of the folds the distance between the pairs of rollers III and IV can be 600 + 1 mm from one another. The offset by 1 mm guarantees that the needles of the pair of rollers IV are 1 mm behind the point of application of the needles of the ^{T in the longitudinal direction of the material web} If, as shown in FIG. 1, a large number of roller pairs, here eight roller pairs, are selected, then with a needle spacing of 4 mm, the successive pairs of vials a distance of, for example, 600 mm + 0.5 can now be given. In other words, the Viarenbahn is bent at a longitudinal distance of 0.5 mm by the needles of the roller pairs I .. ·· «VIII. The above arrangement can be completely or partially dispensed with if the web can perform an oscillating movement between the rollers that resembles a rope oscillation, so that in this way the needles of successive pairs of rollers engage at different points on the web. The same can be achieved if the material web has a corresponding slack between the roller pairs;

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To vary the points of application of the needle tips on the ./arenbahn, körn'.en the distances between the roller axes 3, 4 of the '"' can be changed as successive pairs of rollers«

The needles on the circumference of a ".." alze 1,2 are arranged in rows 16 in circumferential direction and in rows '17 in the axial direction, ie in the transverse direction of the ".'arenbalin. The distance between two in the longitudinal or transverse direction the rows 16 located in the arenal path is k or 1. Furthermore, the needles 17 of the row 13 are, for example, opposite the rebukes 19 of the next parallel row 20 in the transverse direction of the arenbalin from one another by half the distance of the neighboring! censures. The same applies to the needles in rows 16. The spacing is preferably more adjacent. Needles in the transverse direction as in the longitudinal direction of the tape, ie in the circumferential direction and in the axial direction of the V.-alze the same. Ss a distance between two needles results in a series of Radel the size 2k and 21, respectively, and a rhomb d.er needles on the ^T ./alzenumfang, which is symbolized by the dashed lines indicated needles 21 in Fig. 3.

A wave-shaped deformation of the material web is thus evident in their transverse direction as well as in the longitudinal direction, with the fold again 1,2 successive pairs of rollers 1.11 ...... VII, VIII have an offset in the axial direction.

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230687Λ

The ¥ alzen of successive pairs of rollers around the A fraction of a needle distance can be offset in the axial direction, so that the needle contact points also in the transverse direction of the needle path now have a distance of e.g. 0.5.

As indicated in Fig. 1, the web can ¥ before the described mechanical treatment through the needles of the roller pairs I, II ....... VII, VIII through a treatment tank 22 in which the web W is subjected to a chemical reservation and in the state in which the agent in the treatment tank has reduced the flexibility of the material web W is passed between the needles of the rollers.

In the embodiment according to FIG. 2, instead of the roller pairs

I, II, VII, VIII consecutive. Band pairs IZ, X off

short needle ribbons provided. Here, the material web is subject to a somewhat longer treatment than between the rollers 1, 2 a pair of rollers.

The rollers 1 to one side of the web W are also driven synchronously like the rollers 2 to the other side of the web (Fig. 1). If desired, the rollers 1 run slightly or slower than rollers 1.

In the embodiment of FIG. 8 are a larger needle roller 23 a number of smaller needle rollers 24 are assigned. This results at least for the roller 23, which is the rollers 1 to one side of the material web W in the embodiment

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after 7ig. 1 replaced, a simpler drive than for the eight folds 1 of the embodiment according to this figure, otherwise the needles are subject to the ialzen bzvr. these 7 / alzen soloct the staggered arrangement of their! Blame or V ^"r alzen.

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Claims (15)

.Patent claims: ¹ 1 i Continuous process to increase the flexibility of a fleece Web of compacted, paper-like plastic ^ thereby characterized in that the web of material in its longitudinal and transverse directions undulating between chimney-like interlocking Rows of pointed, close "together standing T-reprimands is carried out, 2. The method according to claim 1, characterized in that the web of material through the nips several in the transport direction the web of needle rollers arranged one behind the other «, are guided, through the web, at different Set their longitudinal and transverse extension in the nips is deformed in a wave shape, 5 »Method according to claim 1, characterized in that the - Fabric web through several short needles provided with and synchronously driven parallel conveyor belts Pairs of tapes is led through, 4. Verfahr§n according to claim 1 _? !. dädureh gekennz © iohnet that the web prior to passing between the Blame the pairs of rollers or belts d§r pairs of the flexibility of the Kunststpffes heraus§ΐgend§n chgmisehen Flüssiglceitsb © - handluiig unterw9rf§n viird and in the state _t in the welehgm B ^ jaaridlungsmiiitel dig flexibility hgrab / getzt, between the needles to the rolling Qdgr the volume is Hindu carried out, 401814/9419 5. The method according to claim 1- 4, characterized in that the ".Jarenbahn without tension on the exit side of the nip es or pairs of belts loosely on the needles in the nip or between the belts through them is transported. 6. Apparatus for performing the method according to claim 1 to 5, characterized in that the needles of the rollers (1,2) or belts are arranged in rows, the rows of needles following one another in the longitudinal and vertical directions (13,20) a fold or a band ura half the distance two needles (17 or 18) in a row offset from one another are. 7. Apparatus according to claim 6, characterized in that the roller axes (3, 4) of a pair of rollers (1 ..... VIII) horizontally or vertically by 1-5 times the distance and / or a fraction of the distance between two adjacent needles a row of needles are offset from one another in the transport direction of the web. 8. Apparatus according to claim 6 and 7, characterized in that the distance (c) of successive rollers (1) located on the same side of the Ifarenbahn (W) is a multiple plus a fraction of the distance (1 or k) between two 'adjacent needles (7) a longitudinal or transverse row of needles on a * ^r alze (1,2). 409834/0459 9. Apparatus according to claim 6 to 8, characterized in that the rows of needles located in the circumferential direction of the roller two adjacent rollers (7) to one side of the web (W) or these rollers themselves against each other by the fraction the distance between two needles of these rows of needles are axially offset. 10. Apparatus according to claim 6-9, characterized in that the rollers (1,2) of a pair of rollers (I ... ". .VIII) horizontal or vertically offset from one another and adjustable. 11. The device according to claim 6-10, characterized in that several needle rollers (24) of a larger needle roller (23) are assigned and the web (") passed between the large needle roller and each of the smaller needle rollers is. 12. The device according to claim 6 to 11, characterized in that the needles (7) or the needle tips in the direction of rotation the rollers (1,2) are directed. 13. The apparatus according to claim 12 _9, characterized in that the needles or needle tips enclose an angle of 1-20 ° with a radial plane directed through the needle base. 409834/0459 14. Apparatus according to claim 6 to 15, characterized in that the distance between two adjacent needles (7) is one The needle row is 2-6 mm. 15. The method according to claim 6-14, characterized in that that the transport speed of the web is 50-300 m / min, amounts to. 16 "Device according to claim 6-15, characterized in that that the folds of one or more pairs of rollers are driven synchronously. 409834/0459 Blank page