DE6601883U - SHEAR-THROUGH TRAIL OF ENCLOSED CONTINUOUS FEDES AND METHOD OF MANUFACTURING IT - Google Patents

Description

PATENT ADVOCATE = / J

DR.-IN8. BY KREISLER D R.-l NG. SCHÖNWALD DR.-1'NG. TH. MEYER DR. FUES DIPL.-CH EM. ALEK VOM KREiSLER DIPL-CHEM. CAROLA KELLER DR.-ING. KLOPSCH

COLOGNE 1, DEICHMANNHAUS

January 17, 1969 Ke / Br.

C 12 472 / Bh Gbm

Celanese Corporation of America,

522 Fifth Avenue, New York, N.Y. 1036, (V.St.A.).

Device for opening and spreading a crimped fiber strand

Web or sheet-like products made from continuous threads or staple fibers without V / flat or knitting are usually referred to as nonwovens and are used as filters or in the manufacture of clothing as padding and reinforcement for these clothing, depending on whether a binding agent is used during manufacture of the nonwoven fabric was used or not, depending on the type and amount of this binder. The products made from staple fibers I have disadvantages insofar as they are not sufficiently stable and durable, even if they are reinforced by a binder or combined to form a multilayer structure to form a more stable web-like product. The products tend to lose their fibers, which means they are less full-bodied after a short period of use, can be compressed more easily and only have a low resilience.

The innovation means that translucent bahnföx..i -.- ge Fiber products are made from continuous filaments of extremely high uniformity, with special Advantage in various areas, in particular

others in the textile field, for the manufacture of pillows, Pclstern and artificial leather can be used. The product consists of crimped filaments which are generally all arranged in the same direction and due to the crimps in the threads and small irregularities in their position to each other vsrf ivSiiwR and suss «} = be kept.

A web of the type described is produced in-that a curled fiber strand made of synthetic continuous threads initially opened wi * i \ ä, the individual threads so in their position are changed so that their crimps no longer match those of the neighboring threads. The opened strand is then under the action of external forces that separate the individual threads from one another move away, spread out.

The subject of the present innovation is a device ^: for opening and spreading out a fiber strand for the production of these web-shaped, without weaving or knitting products with improved properties.

The basic principle of the device when opening the fiber strand is that the fiber strand moving in one direction is passed between at least a pair of rollers, of which at least one orphan has an interrupted surface rather than a smooth surface, so the individual threads of the strand are not permanently, but alternately grasped by the roller and then released again and during this release of one thread the other thread * of the strand are grasped and then also released again. In this way, the synchronization of the current ripples u s strand eliminated Bas basic principle consists in spreading of the opened strand is simultaneously äaß over the entire width of the strand forces act in the way. *

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that at least one force resultant the individual threads λ

I of the opened strand moved away from each other.

The new device for opening and spreading a crimped fiber strand made of continuous filaments, essentially with simultaneous removal of the synchronism of the crimps in the strand, is characterized by at least one pair of rollers 1, 2, of which at least one roller has a profiled surface with incisions and elevations. and by at least one, but preferably several arranged transversely to the running direction of the strand, j up! arched or curved rails 3a-3e increasing length, which at their opposite ends by two diverging frame portions ¹ I-, be worn 5 and of which the shortest Rail 3a corresponds approximately to the width of the strand leaving the pair of rollers 1, 2.

According to the innovation, the cord will be opened and removed the synchronization of the crimps is preferably carried out with the aid of several pairs of rollers. As already mentioned, one roller of each roller pair has a smooth surface; the other roller has a profiled surface, in which the alternating incisions and elevations are preferably inclined or helical extend in opposite directions from the center to opposite ends of the roller. Does he go; Between the two orphans of some pair of rollers, some threads will see the tops of the, Elevations of the profiled roller and the outer peripheral surface of the opposite roller with a smooth surface captured while the threads aligned at the same time in the direction of the incisions of the profiled roller are able to pass unhindered through the pair of rollers. Appropriately, only one roller of each roller pair is effective driven, the other roller but resilient against the first one pressed and when the strand passes through the WaJ.-

3> 5 zen ^ palt with rotated.

i I β Il I

· »« ·· Il 11

As the opened cord spreads out, it is transformed into a cohesive web of greater width and remarkable density. Preferably, the overall _Λ opened strand is spread on 1.5 to öfache its original width, said webs of a width

^; of 2 low σαβϊ ¹ flour "· eFnäiteii WeFueil κίοϊ« Τ.βΤϊ., uüüh is ftiv?

a web width of up to 1 meter is sufficient for most applications.

j About the curved rails that are in the device

! 10 transversely to the direction of movement of the opened strand i

j stretch, the opened strand with relatively j

j pulled away under low tension. This tension becomes)

on the opened line from which the synchronism of the!

j!

Pucker has been removed, a pressure exerted when i ! 15 this moves over the curved rails and i is bent, and under the action of this pressure the threads move away from each other.

In the webs according to the innovation, all threads are endless in the longitudinal direction of the web in the same direction. But if you look at the individual crimps of a "" 'Single thread, one recognizes that the parts of the thread do not run in a different general longitudinal direction, but- that zigzag back and forth across the general direction. The ripples have such an amolitude that the part of the single thread called the crest of the crimp covers one or more adjacent threads, while the part called the valley of the crimp covers one or more adjacent threads on the other side. This contributes to the cohesion of the railways.

pG The fiber webs obtained by opening and spreading can be connected to other sheet-like materials, for example with stiff linen or a knitted product, for example a tricot frame, a carded fleece

made of staple fibers or with other materials such as foam rubber, leather, paper or plastic films. A door made of cellulose acetate threads, for example

with a denier of 5, which weighs 3.5 g / m and has 32 threads per cm of width, for example, on one Splints made of tissue paper can be glued on, whereby sin, effectively reinforced paper with a pleasantly soft handle is obtained.

The fiber webs can, however, also be combined to form laminates by, for example, continuously laying them down on an endless conveyor belt and forming a laminate consisting of several layers on this during a corresponding number of revolutions of the conveyor belt. These laminates can then be sewn transversely to the planes of the individual webs in order to make the threads in the laminates tighter if necessary; other ^ u connect. The \ laminates formed from lightweight webs can even without suturing, for example, j • for filling pillows, scarves, cushions, upholstery, ■ 20 isolation pad or sanitary napkins are used. i

The fiber webs are also special ^ Xr Herste! -) : ■ suitable for yarns by arranging the web in a row "si . _ Is subdivided by narrow ribbons that form the desired Number of thread included. From a web containing 50 cellulose acetate threads of 5 denier per cm width For example, yarns of 640 denier can be obtained by cutting tapes in a width of 2.5 meters and gö ~ if necessary, twinned to round it off *

The panels can also be easily converted into porous fabrics similar to stiff linen, in which the panel contains a pattern in which the area has oime threads ^; or alternate thread counts lower than the average thread count with areas in which dia

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: '.ier. density is generally considerably greater than the || average thread count of the web. This pattern in | the cream can then be set. Such a pattern | can eispielsweise r-obtained v / ground if one f the web ζ Uncer voltage over a heated drum leads., the numerous f [rich, i ~ i distance up arranged elevations from one another has *. With the web under tension, pasers J i ". The 2-line spaces between the elevations of the hawser ©! 1 are pressed and open areas are formed in the bay |

and durc'i fixes the heat of the drum., The illuster and f the type ier produced web may the shape and the distance of the projections are changed on the drum by varying \. In addition, patterns in the web can, for example, be one of knitting openings for a

IS created a corresponding medium, for example air or water will. Porous fabric produced in the manner described, optionally including a binder was applied, for example, to produce vrr. VerbäXiden, towels, filters, diapers, sanitary towels

. > ■; i: ..: Dust cloths can be used.

; ;; · -eru: ir; has proven itself particularly with fiber strands, 'j : ■ ·. ■ :. · ^': \ \ Eu from Polyäthylentarephthalat or cellulose; · · · .. ♦; r. with the usual acetyl content of, for example:. , calculated as acetic acid, consist; they prop. ic: ab * ·: also for fiber strands from an-: ...? >, · · TAeni, for example polyesters of terephthalic ■ .i \ ι :, crazy glycols, linear superpolyamides, poly-. .: *: i ^ ίηα Copolyn. ^% ren of acrylonitrile, olefinic i _-. ,, ■ · .._; ■; .-. ui.u copolymers, ethers and / or ethers of cellulose, for example cellulose propionate and cellulose acetate propionate, highly refined cellulose which contains less than 0.29% of the hydroxyl groups per hydroglucose unit, such as cellulose triacetate »so / ie rayon (regenerated) cellulose . The number of threads of the starting strand can be within wide limits and up to 1,000,000

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wear with a denier per thread up to 25, for example from 1 to 20. The number of crimps per centimeter of the strand can be up to about 3> 0, preferably become 1 to 20, especially 1 to 8 crimps.

The innovation is described in more detail below in conjunction with the drawings:

Fig. 1 is the schematic representation of a device that for opening a crimped strand of continuous filaments and spreading the strand ssu a coherent band considerable width can be used.

Pig. IA is a section in the direction of the line a-a of Fig.l. and shows details of a portion of this strand opener and the means for removing the curl.

Fig. IB is a section in the direction of line b-b of Fig. 1 and shows the spreading device of FIG. 1 in plan view.

According to FIG. 1, a fiber strand 6 made of continuous filaments is taken from a supply 7 and via a guide 8 to a spreader nozzle 9 led. In this nozzle, which can be omitted if necessary, the strand is treated with compressed air and shaped into a relatively narrow flat ribbon. After leaving the nozzle, the strand 6 enters the Strand opening device 10, the two pairs of parallel and equally long steel rollers arranged one behind the other 1 and 2, between which the strand is passed. As FIG. 1A clearly shows, the roller is 1 '■; each iaares with two rows of inclined elevations la; and incisions Ib are provided which are helical in opposite directions from the center around the WaI ^ ze run to opposite ends. The roller 2 of each pair has a smooth surface and is on their outside with a sleeve made of rubber or the like

la * »· c» * ♦

elastic material provided. Instead of the one in Fi <$. 1, two pairs of rollers 1, 2 shown, in practice only one pair or even three or more pairs of rollers can be used, depending on the physical properties of the fiber strand to be processed.

Upon exit from the opening of the strand and the Gleichet on the crimps eliminating device 10 is ύθτ strand 6 under a tension of less than 4.5 kg over a spreader 3 performed in which the band-shaped strand is widened considerably. This spreading device 3 is in Pig. IB shown schematically and consists of several upwardly arched or curved rails j? A to 3e of increasing length, which are supported at their opposite ends by two diverging frame parts 4 and 5 and the shortest rail 3a, the length of which is approximately equal to the width of the opened Is strand 6, the outlet end of the opening device 10 is closest. If the opened strand is moved transversely to the rails 3a ″ to 3e and touching them, it is widened considerably so that the path obtained can have a width of two meters or more.

In order to subsequently stabilize the web without the aid of additional web-shaped products, a binding agent can be applied, for example by means of a spray system, a bath or a roller system, on one or both sides of the moving web. The binder may be a Weifhmacher or a solvent for the thermoplastic material from which the threads are made, being, or an adhesive which is -verträglich ™ with dew tihermoplästisehen material. For gelulose acetate threads, for example, triethyl citrate, dimethoxyethyl phthalate, methyl phthalyl ethyl glycolate and glycerin triacetate (triacetin) can be used as plasticizers or acetone as solvents, while for polyester threads chloral hydrate and various synthetic polymer emulsions can be used.

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sions are particularly effective.

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Claims (2)

Protection claims 1.) Device for opening and spreading a ruffled Fiber strand from Fndlosfäden, in wesentli Chen under G. timely elimination of the synchronism of the crimps in the strand., characterized by at least one pair Rollers (Ij 2), of which at least one roller has incisions and has elevations having a profiled surface, as well as at least one, preferably but several transversely to the barrel. Seal of the strand arranged , upward arched or curved rails (Ja pe) increasing length, which are carried at their opposite ends by two diverging frame parts (4, 5) are and of which the shortest rail (3a) is about the width of the pair of rollers (1, 2) leaving the open Strand corresponds. 2.) Device according to claim 1, characterized by two pairs of rollers (1, 2), each of which has a roller (1) a pair of elevations (la) and incisions (Ib), which are either preferably endless and to the axis of the roller are inclined or helical run in opposite directions from the center around the roller to opposite ends, while in each case the other roller (2) of a pair has a smooth surface and preferably on its outside is covered with a sleeve made of elastic material. 6 6 Vj) α b ö ό