DE1660558A1 - Package of plexus filamentary material and method and apparatus for their manufacture - Google Patents

Description

E. I. DU PONT DE NEMORS AND COMPANY 10th and Market Streets, Wilmington, Delaware 19898, VoSt> Ac

Pack of plexus filamentary material and process and Device for their manufacture

The invention relates to a pack of continuous, strand-like packs Materials and a method and device for producing the same »

In U.S. Patent 3,081,519, there is a strand material fibrillated type, which consists of a three-dimensional, whole-forming plexus of artificial, organic, crystalline, fibrous polymeric elements which are in the form of film fibrils less than 4 microns thick. The filrafibrils in these strands show, probably due to electrostatic forces or due to their plaque

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NPD-115

Structure and large surface, a strong attraction to each other. As a result, it has proven particularly difficult to obtain a package from which such a strand can continuously decrease without the occurrence of tangles. Conventional, straight-wound packages, such as spools »are for collecting strands is unsatisfactory because of the difficulties involved in reciprocating at high speed offers »Flat packs and cake toppers result in the impression of helical winding and of loops and shape the removal of the Strand difficult »

The present invention makes a plexus filament package Material available from which the strand material can easily be obtained again, a method for this pack forming at high speeds, as well as an apparatus to operate the process in conjunction with continuous formation carry out a fibrillated strand and continuously withdraw the package obtained from the collection zone.

The product according to the invention is a package in the form of a plexus thread Strand material, which is a three-dimensional, a whole forming network of pilm fibrils of crystalline, oriented, artificial polymer, the PiIm-

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fibrils have an electron diffraction angle of less than 90 ° and an average film thickness of less than 4 microns, and is characterized in that the convexity has a rod shape and a density of about 0.016 to 0.24 ff / cm and consists solely of continuous strand material that has been collapsed in the longitudinal direction, from the each of the two ends of the strand rod (Batt) is removable is _o Preferably, the QuerschnittafIache of the packing is 1 to Afache and especially 1 to i, 5faohe that of the strip material located therein.

The rod-shaped packing according to the invention is produced by flash spinning, the method being characterized in that the strand material as it is formed is introduced axially into an elongated passage and impinges on a flexible collecting surface at a substantially right angle, whereby it collapses on itself in the longitudinal direction, if desired, at sufficient pressure that the resulting strand is continuously forced out of the passage at a rate that is 1/25 to 1/3000 the rate of strand formation. Preferably, the cross-sectional area of the passage is 1 to 4 times that of the strand material and the pressure in the passage is maintained at 0.00704 to 0.35 kg / cm.

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The device for producing the rod-shaped packing according to the invention is provided with an outlet opening for the relaxation -spinning of a plexus thread-shaped strand material and a collecting device for receiving the thread-like material and is characterized in that the collecting device is formed by a tubular line, which is in contact with the outlet opening and »extending away from it , forms an elongated passage» into which the thread-like material is discharged from the outlet opening at increased pressure »whereby a means is provided to increase the pressure in the passage to a value between To maintain spin pressure and atmospheric pressure. The tubular line preferably tapers in its cross-section » whereby the diameter at the end remote from β ρ inndtts is smaller than at the end near the spinneret » whereby further means for setting or adjusting the taper can be provided if desired. According to a preferred embodiment of the invention, the means for pressure control is formed by a series of perforations in the line in the vicinity of the end near the spinneret.

Plexus floors and relaxation spiders are described in detail in US Pat. No. 3,081,519 , to which this ver vdeseno

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The invention is described in more detail below with reference to the drawing » Xn the drawing shows:

FIG. 1 shows a rod-shaped convolution of strand material "that of .a longitudinally collapsed, one-piece, three-dimensional film fibril network is formed, Mg. 2 in perspective, cut to the rope, in connection with a spinneret and a strand collection device the extrusion of the rod, Fig. 3, partly in section, a spinneret and collecting chamber, -nobel the tubular pipe is generally rectangular Has cross-section and its top wall at the upstream end

is hinged ^:

Jfig, 4 partially in section a spinneret and a strand 3 collecting device, wherein the tubular conduit is formed into a perforated cylinder which is an obstacle in porm ainee termination, and

? ig. 5 one for use in the devices according to :? ig. 2,3 or 4 suitable spinneret.

The pack is in the form of a long stick or stick and the strand can be pulled from the end of the paokung to anybody ! Undo, decrease without turning the rod or creating a twisting force in it.

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Fig. 1 shows the product in detail. Pas product is made by the long, rod-shaped pack 1 with a removal allowing Formed ends 2 of a single strand. The strand of plexus thread is made of a three-dimensional, forming a whole Network of film fibril elements 3 formed. The filrafibril elements are at random (statistically disordered) intervals along the strand and across the strand connected and less than 4 microns thick »

The strands are continuous in nature and let aioh in Produce essentially endless form »The whole strands can have a fine denier such as 15 denier to a coarse denier such as 100,000 that, or even more, «The highly fibrillated strand has the appearance of a sliver or a cable made of extremely fine fibers« The film fibrils, however, are in the form of a network with one another connected, with only a few, if any, unconnected fibril ends

The strands according to the invention generally have strengths of at least 1.0 g / den and can have high strengths in the pre-stretched state, such as 23.0 g / den »(Vor To determine the strength, the strands receive 300 turns / m ·)

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A preferred class of polymers for the formation of plexus filaments forms the crystalline, non-polar group, the mainly of crystalline polyhydrocarbons, e.g. B « Polyethylene, polypropylene, and copolymers of ethylene and propylene. With the polymer solution before Pressing out (extrusion) the common textile additives, such as dyes, pigments, antioxidants, matting agents, antistatic agents, reinforcing particles, adhesion promoters, removable cables, ion exchangers and uV stabilizers, mixed to make strands with a content to obtain such funds.

The package of FIG. 1 usually has a concave end (4) and a concave end due to the nature of the strand collecting device other (5) convex, the convex end being the end remote from the spinning nozzle. The continuous decrease in the Strange is usually lighter from the concave end, but removal can be done from either end. «An interesting feature of this strand package is the ease with which it is attached can be divided into smaller packs. By simple, strong bending, eich can split the rod into two (parts, each of which allows strand removal at each end. The ends remain intact during the break of the pack, may but after the two parts of the pack have been separated, the pack is continuously cut out of the

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The device is squeezed out and can be obtained in endless form, but it is expedient to break it into pieces about 1.8 m (6 feet) in length so that the pieces can be packed side by side in containers for shipping. Bas material can j however, it can also be sent in endless form by rolling it up in the manner of telephone cables or electrical wires.

The cord that can be removed at each end of the pack is retained in the form of a whole network when it is removed » The network usually takes the shape of a when you lose weight Cone, the apex of which is directed in the direction of the strand movement during decrease. The scope of the network at the The base of the cone is generally circular in shape, but within the circumference there are innumerable fibril elements which be pulled out simultaneously in a random manner from all parts within the circle area. The cone base can oscillate somewhat within the confines of the package as it is removed, but in the preferred manner there is no appreciable zigzag fold of the entire strand in the package. If the strand is removed with little or no compression at the beginning, it has a downy, high-rise, three-dimensional shape, the diameter of which is often very low, like a few hundredths of a pound / cubic fuse. Sr is in this form of a plexus thread-like strand without building blocks » without the aid of a collection device simply into the

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Atmosphere has been spun ₉ essentially indistinguishable O

To preserve the character of the plexusfadenförmigen ₉ much fibrous network, the cross sectional area of the package should not be more than about four times that of the Kegelbasie, do ho less than four times the cross-sectional area of a whole forming fibrils network at any point in the pack. In the preferred product the cross-sectional area of the package is less than 1.5 times that of the Filrafibrillen network _o This means upon removal of the strand from one end of the pack dasa in; iegli: jhem time fibrils of substantially all 'rush a in general circular area, the size of this area being at least 1/4 »but preferably at least 2/3 of the cross-sectional area of the packing ο While the lateral dimensions of the strand network and the packing can be almost the same, the length of the packing is of the order of magnitude of 1/25 to 1/3000 of that strand before opening the package.

A desirable feature of the pack is its lightness, with which you transform yourself into a fluffy, high-puffed cable, läsato The strand is created by the simple act of Abzienena brought to "give up" from the pack, do h »zur

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Forms a soft, fluffy cord that is good for textile use and for making cigarette filters is suitable ο due to the unique capabilities of the pack » There are many others available to provide apparently endless lengths of bulky strand to a small size package Purposes, including play and amusement purposes " The easy "untangling" of the cable can be understood if one considers the method by which the film fibrils in the Pack. The network is essentially never compressed in the transverse direction, but simply underneath Removal of most of the air that normally fills the spaces between film fibrils in the network, longitudinally collapsed o The film fibrils are individually for themselves or folded in composite form, but with general the entire strand is not subject to any folding "

The specific description of the invention is based on bar-shaped packs of circular or rectangular cross-section, but depending on the intended use, a variety of cross-sectional _{shapes can of course be produced o} In general, rectangular-type shapes that can be packed with minimal space requirements are preferred

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Spinneret and strand collector

The device according to the invention is shown below with reference to Piß. 2 showing one of the embodiments. As shown in the drawing, the spinneret 6 is provided with an outlet opening 7 through which a solution 8 of a artificial, organic polymer is pressed out under the action of a high pressure, which is caused by the solvent force is obtained at temperatures above boiling point; the pressure can also be achieved by combinations of solvents-3smpfd: * uak and mechanical pressure, the pressure of inert gases or other pressure generation methods.

Surrounding the SpittMUgen opening 7 and axially away from it extending a tubular line 10 is provided which forms an elongated collecting passage 9. As the drawing shows, the line 10 is the nature of an elongated, Kenyan element generally circular in cross-section, with the diameter and cross-sectional area moving in the direction Gradually decrease towards the end remote from the apinnaeus. In the open, End 11 of the device remote from the spinning nozzle, the rod 1 emerges. The wall of the line 10 1st, particularly near it its end near the spinneret, provided with numerous holes 12. In operation, the solution is released through the outlet pressed into the collecting passage 9, whereupon the solvent suddenly evaporates and in this way a three-dimensional

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Network IJ arises, which is on the surface 14 of the previously formed pack 1 collects. Some of the expanding gas escapes through the holes 12. The remaining gas, which usually has a pressure of 0.1 to 100 psig (0.007 to T atü) has the effect of the previously formed pack compress and continuously push the accumulated material out of the opening 11. The inside diameter of the pipe 10 at the end near the spinneret is roughly the same as the outdoor uretai eater the spinneret, so that the line is firmly arranged on the spinneret and attached to it with (not shown) conventional means, such as a clamp can.

If there is a sufficient hole area in the collecting passage, vim the maximum amount of the generated solvent vapor free » iiugeban, the process controls itself. If the Pressure in the passage 9 to move the strand rod builds up the strand material impacting itself and covers holes, creating the open area for escape the steam is reduced. The pressure increases according to the mechanism up to the value required to move the urge is enough. When the pressure in the passage is equilibrium exceeds, the accumulated wetness of the thread-like Material accelerates and occurs an exposure of

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further holes, which increases the open area for the steam to escape. The pressure sinks in this way again until equilibrium is reached. Egg; the case may arise «that the collected pack moves intermittently, but generally strand movement occurs at a constant speed after once the pressure equilibrium has been reached.

The pressure in the passage can naturally be further regulated by pressure regulating valves in an opening for the escape of the gas in a discharge line which is connected to the passage. On the other hand, you can also use the Rcibun ^ properties of the header, z. B. in relation to tapering or other obstacles, change in order to influence the pressure and in this way to influence the speed of the extrusion and the packing density. In any case, the pressure in the passage should be kept at a sufficient value so that the rod-shaped packing is continuously pressed out of the passage at a speed which is 1/25 to 1/3000 the speed of the strand formation. Adjusting one or more of the variables so that the extrusion process proceeds smoothly and effectively at the desired speed is possible without difficulty.

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ti

Of course, you can go around the perforated chamber Provide a vapor collection device for solvent recovery.

The packing density can be changed «by changing the Adjusts the size of the outlet end of the manifold and the degree to which the cross-sectional area of the conduit is with approaching this end decreases. By changing one or both of these factors, the pressure is changed, which are needed in the passage 9 to move the pack. Depending on the shape of the room and the dimensions of the The pipe and the opening can be changed in shape and size Change the pack as much as possible.

One function of the collection device is to provide between the spinneret and the collected packing to form a pressurized chamber with a means for venting of excess steam is provided at a rate corresponding to the rate at which the Solution is spun through the outlet opening. If no holes or other means of venting the pipe are used find, the system develops sufficient pressure during operation to completely remove the packing from the tubular conduit throw out. Another function of the collecting device is to direct the forward movement of the package

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au enable. In the tubular conduit 10 of Fig. In this regard, the friction which the packing by contacting the inner circumference of the tapered tube, used to remove the pressure developed by the steam To compensate for force, but also other devices for inhibiting forward movement can be used.

To maintain the desired pressure, the Oesamt · = area of the holes in the collection zone is kept at one value which corresponds to the size of the spinneret opening.

Be cer construction of the device should be selected so the various dimensions that the expanded, relaxation strand spun onto the surface of already accumulated package impinges at a point _f at which the network has first reached its maximum diameter. If the surface of the pack that has already been collected is too close to the spinneret, the speed on impact leads to a crack in the layer, which results in strand breaks when the strand material is removed from the pack. In addition, the strand shows a tendency to fold and shift transversely to the package axis. If the point of formation is too far from the exit orifice, the strand will tend to lay down parallel to the package axis or the strand will become complete

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blown out of the collecting device * In the case of strand storage of the parallel type, removal of the strand from the package is not possible without undue breakage.

If the dimensions of the manifold and openings for the escape of the gas has been properly selected according to the flow rate of the polymer, the outlet opening and the solvent concentration are, packing occurs at the point where the strand reaches its maximum diameter. In this case there is a longitudinal collapse of the strand without excessive overall folding, and the strand can be drawn from easily remove from the package by pulling on its free end.

Given the working conditions, which removed the impact of the strand at one point from the outlet opening Allow point, the taper of the manifold can be reduced, so that the collected convolution a correspondingly needs less resistance to overcome. On the other hand, by reducing the opening 11 of the Collecting pipe reach a higher pressure in the pipe. This also gives a more rapid expression of the strict "=" like pack.

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HPD-115 in.

Another embodiment of the device according to the invention is in Pig. ~ *>, shown partly cut, with i & ttai: / o2'göS3h «sn- which mean the adjustment of the taper . S?! I; K © l <3i! Pßhlasses during the collecting work. The spinneret 6 is surrounded by a Sas & iKilliJitung, generally designated 21, of rectangular cross-section. The outlet 7 UQr spinning oil opening 7, like the collecting line, is aligned horizontally. The top wall 22 of the horizontally arranged conduit fits snugly between the adjacent side walls 23 and 24 without, however, being provided in a stationary manner. This upper wall is rotatably suspended at the end near the spinneret by means of a hinge 15, whereby it is in good contact with the two side walls 23, 24. Preferably, the articulated upper wall 22 and the opposite V / and 25 are perforated over their entire length, while the two side walls 23 and 24 are not perforated. The pivotable wall is pressed against the pack by weights 26. In operation, the manifold is in the shape of a cut-off wedge. The imperforate side walls 23, 24 of the Sammelkamraer are sufficiently large to a degree of Ka: / * ner to give independent of the positions of the pivotable wall 22nd A rod-like pack with a rectangular cross-section is obtained on this device.

The "A" j "internal form of the device according to Pig. 4 shows a

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perforated, round tubular element 51, which almost forms a straight, circular cylinder. In the vicinity of the end of the nozzle, a closure plate 52 is articulated on a hinge 35, the plate 52 being able to act on the pack when it emerges from the opening 11 and be able to rest on an arm 55 on the plate 52 Weight 54 attached, which supports the generation of the friction · = which is required to control the extrusion speed and thus the pressure in the passage. An extension 56 of the tubular element 51 prevents the weight of the closure plate 52 and the parts associated with it from causing the pack 1 to break. When starting up, the end 11 remote from the nozzle is closed by the plate 52 and remains closed until sufficient thread-like material has accumulated, whereupon the compression of the pack begins and the pack pushes the plate 52 up into the position shown.

Details of the relaxation spinning are described in U.S. Patent No. 5,081,519, referenced above. There are about but also in achieving a rod-like pack with a certain density range, a good Abnehrabarkeit the strand material from the pack and I ^«# Reihs? Ith node, thickening, bubbles or other defects in the continuous network structures more encryption

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The rod-shaped packing of longitudinally collapsed, fibrillated continuous material is produced by spinning a solution of organic polymer through the spinneret opening, the solution upstream of the outlet opening being under pressure at a temperature above the boiling point of the solvent. The solution passes through the opening in an elongated, circumferential passage (collecting zone) which is at a significantly lower pressure, but which is above the breathing pressure. A fibrinated, continuous strand is obtained at the outlet of the outlet outlet. Ger is formed by a three-dimensional network. The cord expands and meets a resilient collector surface at essentially a right angle. In this way he experiences a longitudinal collapse. B. in the spinning direction. The lateral dimensions or cross-sectional dimensions of the accumulated fleece (strangctange) are dominated by the size and shape of the li'inde which form the passage, this V / Unde being able to form a generally cylindrical or tubular conduit. The cross-sectional area of the throughput is 2;? "May equal to the maximum Querschnittßflache Strand S'5tsvierks or larger than this, however, should be as small in both cases that a fold of the total

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Io

Strand is prevented in a ziek ~ saek ° like manner. That I from dome polishing at the outlet opening separating, gaseous Solvent is allowed to expand in the collection passage, in part by making it onto the collection surface and the filamentary material exerts a thrust in the direction away from the exit opening, and in part escapes through holes in the walls which open the passage form. The collapsed, fibrillated network material tarnishes and becomes continuously out of the Sanimeldurehlass under the action of the generated in this Oasdrucks driven out, so that a continuous, rod-shaped fleece (the Strand rod) is pressed out.

The preferred fibrillated material for the pack is according to the invention with easily removable strand material Linear polyethylene used. The polymer becomes advantageous from spinning solutions of 10 to 14% by weight of polymer Relax-spun in trichlorofluoromethane. The temperature on the upstream side of the spinneret should be above a temperature equal to the critical temperature, minus 45 ° C., of the solvent, but is preferably higher and is in particular in the range above the temperature value which is subtracted from the critical temperature 20 ° C results. In addition, for the purposes of the invention

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Bridge the solution upstream of the spinneret well above ν. normal vapor pressure of the solvent lie at the temperature mentioned, the additional pressure being exerted on mechanical VJege, vjie by means of a piston pump. The 'Di ¹ UQk. should be kept above the two-liquid phase = pressure limit • satr-ösä (ie the pressure of a given solution, below which no two liquid phases can exist).

BU is relaxing from the exit of spinneret orifice I :? '; Vu: ·% then reaches the collecting passage, which is kept under pressure substantially below the pressure of the pressure reducing chamber. To achieve the compressive force for the collected

For strand material, this pressure should be above 0.00704 kg / cm.

On the other hand, the pressure should be kept below about 7.04 kg / cm in order to promote rapid evaporation of the solvent and complete expulsion of the collected

Avoid packing from the pipe. I mar »preferably works at a pressure between 0.100704 and 0.35 kg / cm . The pressure in the collecting caromer is measured using a conventional pressure gauge *

The solvents used in Erit chip spinning must be b € ifShii £ '; be able to separate quickly from the polymer as it cools. Fvifisr hiusö one of the solution upstream of the spinneret enough v / araio κaf 'clocks «around the entire, for the

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to dampen the solvent during relaxation spinning to provide the necessary heat energy * so that no additional heat is required in the SerßfaelkaKiiner. Trichlorofluoromethane is a particularly satisfactory solvent for this purpose for linear polyethylene.

The plexus-thread-like strand expands during its rapid formation "at the spinneret to form a network of increasing penetration" in order to then not be subject to any further increments. The optimal working method is obtained when the collecting surface is placed at the point at which the strand first reaches its full diameter. At closer range, the strand has a tendency to deposit or zig-zackförmlg in turns. If the distance is greater, the strand loses speed, and again, in an unsatisfactory manner, it lays down in a longitudinal or transverse = zigzag arrangement.

When the collecting surface is at the optimal distance from the spinneret, the network collapses in the longitudinal direction. The optimal distance between the spinneret and the collecting surface is generally 1 to 5 cm.

Dös *, plexus thread-like strand formed on the spinneret

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«Surah choice of the solution temperature, the pressure, the concentration and the dimensions of the outlet opening can be obtained in voFKöiiicdensteri Titem. Titers in excess of 170 denier are satisfactory for most purposes. En z. B. to get the cigarette filter cable from I5OOQ is os Mufig advantageous, the strands, z. As the withdrawal of <fi @ i? 8fc & 2! G; enfSämigen pack, to fold. On the other hand, k '& rm ϊΐίζη also a strong cable directly from a large one

spin.

The following examples serve to explain specific embodiments of the invention, parts and percentages being based on weight, unless otherwise stated.

example 1

A solution of linear polyethylene (Sahsnelsifcdex 0.5, density 0.95 g / cm ^) in trichlorofluoromethane is continuously prepared by the solvent at about 204 kg / hour. and the molten polymer at about 55.1 kg / hr. pumped into a screw mixer in a fixed ratio. The I4 £ ige solution is continuously an automatic pressure reducing valve at a temperature of I85 ⁰ 0 and a pressure of. 127 atmospheres (1800 psig) supplied. The solution arrives at a through an automatic valve

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17.2 gauge pressure cylinder maintained at 54.5 atmospheres (775 psig). The end opening of the spinneret is round and has a diameter of 0.117 mm, while the length of the opening channel through the spinneret p2, atte 0 _? 127 mm. The spinneret surface is flat, without widening on the outer edge of the outlet opening and without countersinking on the inside. The outlet channel fc of the spinneret is arranged horizontally.

A strand in the form of a plexus thread emerges from the outlet opening of 660 those as obtained on removal from the package (or 795 those with 50 g tension) at 33.1 kg / h. spun, directly into a rope collector of the type shown in FIG. 1, which has a round cross-section with an inner diameter of 4.45 cm and a length of 33 cm and is placed flush with the spinneret. At the entrance end the collector is on the first 13.96 cm with holes of 0.16 cm " Perforated diameter, arranged in a square pattern at a center-to-center distance of 0.238 cm and to the • / to avoid a dangling of filamentary material polished are «The remainder of the collector has no perforation.

After the equilibrium is reached during spinning, will the sananel work started by moving the pivotable Plate at the outlet end of the strand collector closes, with

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The plate from a 4th, 5-kg ~ weight (10 pounds) to the Collector end is pressed. With the formation of the pack, the plate is pushed up into a horizontal position and the pack continuously pushed out from under her. The gas pressure in the passage is in the order of magnitude of 0.07 to 0.14 atmospheres (1 to 2 psig).

The package obtained in this way has a round %

Cross-section at 4.84 cm in diameter. Pieces about 1.22 m in length are cut from the rod pushed out of the collector. The rods have a density of 0.116 g / cm ⁵ (7.24 lbs. / Ft. ^) And a solidification ratio of 2000: 1, that is, one meter of the rod-like product contains approximately 2000 meters of strand material. The strand has a titer of 660 den. When the strands are removed from the rod-like packs, a conical network of around 4.7 cm in diameter forms at the λ

Cone base.

The strands in the bars can be pulled off easily, and from each end a soft, fluffy cord is peelable, essentially from knots or thickenings free is.

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Example 2

Using a technique similar to that in Example 1, a strand of plexus thread of 350 den is spun. The strand emerging from the outlet opening at 20.4 kg / hour is fed directly into the strand collector according to FIG. 2 (Round cross-section, 3.2 cm in diameter at the entry end and approximately 2.5 cm at the exit end, 27.3 cm in length) spun, which is set flush with the spinneret and perforated along its entire length with holes 0.16 cm in diameter, which are offset at center distances of 0.47 cm are arranged and polished to avoid strand parts snagging.

After equilibrium is reached while spinning, Started the collecting work by getting the open end of the collector blocked. This arises between the friction of the rod-shaped strand on the walls of the Collector and the equilibrium gas pressure in the collector a balance. The collector becomes a continuous, rod-shaped strand material of round cross-section (2.5 em diameter) obtained. The packing has a density of about 0.16 g / cm, and their solidification ratio is about 2000: 1, i.e. H. the rod-shaped pack contains about 2000 m of rope per meter. The skein has a denier of 350 denier.

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The collector pipe is provided with a longitudinal thickness or seam in such a way that its diameter is due to the action of external forces can be reduced. Adjust the diameter so that the packing is approximately 2.5 cm from the spinneret remote entrance. The strand network has upon impact on the surface of the pack a diameter of about 2.5 cm.

The strands in the fiber packing bars can be easy to peel off «and a soft, fluffy cable can be removed from each end, that of knots or thickenings is essentially free. To remove the strand material, 40 such bars are arranged in parallel on a frame, with all the concave ends of the rod on the same side, pulling the 40 strands from the concave ends at the same time and puts them together to form a cable of 14 100 den.

Example 3

Similar to Example 1, a plexus filament becomes Relax with the 410 strand, the one with 24.1 kg / hour. from the Outlet opening exits. The strand is fed directly into the strand runner according to FIG. 3 with a pivotable top rectangular cross-section (3.5 x 3 * 5 cm at the entrance, Length 31.8 cm), which is flush with the spinneret

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is set. The pivoting top wall and the bottom wall of the collector are on the first 15.0 cm with 140 holes perforated each 0.16 cm in diameter., the Holes are polished to prevent thread snagging. The two side walls of the collector point no perforations.

After the equilibrium has been reached during spinning, the collecting work is started by closing the pivotable wall of the strand collector. After the collector has filled with strand material «a weight of 2.5 kg (5 pounds) is attached to the gate exit«

A continuous, thread-like rod of rectangular cross-section (2.5 χ J, 5 cm) is obtained from the collector

. By attaching the 2.2 kg weight to the Qatter the formation area of the collected pack is constant at a distance of about 2.5 cm from the spinneret.

The strands of the rods are easily peeled off, and a soft, fluffy cord can be removed from each end, essentially free of knots or thickenings.

- 28 009843/1782

Claims (9)

NPD-115 September 30, 1965 Patent claims 1. Pack of plexus thread ~ strand material, which is from a three « dimensional network of film »fibrils of crystalline« oriented, artificial, forming a whole Polymers »is formed, the pilm fibrils having an electron diffraction angle of less than 90 ° and a having average film thicknesses of less than 4 microns, characterized in that the packing Bar shape and a density of about 0.016 to 0.25 g / cirr and consists solely of longitudinally collapsed, continuous There is strand material that is detachable at each end of the strand rod. 2. Pack according to claim 1, characterized in that its one end is concave and the other end is convex is. 2 * pack according to claim 1, characterized in that the cross-sectional area of the strand rod 1 »to 4 times, preferably 1 to 1.5 times that of the In your existing strand material is. 4. Process for the production of the pack according to claims 1 to 3 by relaxation spinning, characterized in that - 29 - 009843/1782 NPD-115 30 that one introduces the strand material axially in its formation into an elongated passage and essentially hits a resilient collecting surface at a right angle, thereby causing it to collapse longitudinally on itself, if desired sufficient pressure to allow the strand rod to continuously exit the passage at a speed of 1/25 to I / 3000 the speed of strand formation is expelled * 5. The method according to claim 4, characterized in that one works with a cross-sectional area of the passage equal to 1 to 4 times that of the strand material. 6. The method according to claim 4, characterized in that the pressure in the passage to 0.00704 to 0.55 kg / cm holds. 7. Device for producing the pack according to claim to 2, with an outlet opening for the relaxation spinning of a plexus thread-shaped strand material and a collecting device for receiving the thread-like material, daduroh gekennzekohnet that the collecting device is formed by a tubular conduit which - 50 -009843/1782 NPD-H5 3Λ is in contact with the outlet opening and forms an elongated passage extending away from it « in which the thread-like material is under increased pressure is discharged from the outlet opening «and a means is provided to increase the pressure in the passage to maintain a value between the spinning pressure and the atmospheric pressure. 8. The device according to claim 7 » characterized in that a series of perforations is provided in the Leittwig in the vicinity of the end near the spinneret to regulate the pressure. 9. The device according to claim 7 » characterized in that the tubular line has a tapering cross section, the diameter at the spinneret-remote bath being smaller than the diameter at the end near the spinneret, means for adjusting the taper being provided if desired. · 009843/1782 3 * Empty soap