DE2438265A1 - ORIENTED, FIBRILLATED UNDER FOAM - Google Patents

Description

Priority: December 26, 1973 U.S.A. No. 428 470

Considerable efforts have been made to to find a way to form cloth-like materials by methods other than weaving or knitting. The weaver of fabrics is an expensive process step, especially when the woven material is made from fiber card slivers will. For some purposes, needling layers of fibrillated film is used; for certain purposes, like as Carpet underlay. however, the layers are not sufficient united. The use of interwoven foil tapes switches off the carding or dissolving. Spinning and yarn waste (garneting) the fibers from; however, it is still the most elaborate Weaving stage required. If such a fabric made of foil tape is used as a carpet underlay, it usually consists of made of polypropylene. The upper material used in the manufacture of carpets and floor coverings is generally made of Polyester, nylon or any other dyeable material. If carpets with long pile (shag carpets) are made, there is often there is a tendency for part of the backing layer to show through the top layer. Because polypropylene through the The dyes normally used for dyeing carpets and floor coverings are not dyed, and so it is desirable

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is that the backing layer is the same color as the top layer or pile layer is colored, the carpet ply layer consisting of woven polypropylene foil tape is im generally needled with nylon or polyester thread if it is to be used to make long pile carpets. on this increases the cost of the carpet underlay and also causes a significant loss of strength.

The invention is therefore based on the object of a non-woven to make material-like material available, the surface of which has improved properties, such as dyeability, moisture absorption, Moisture transport and good grip, shows. The material according to the invention should moreover have good mechanical properties Show strength and be easy to manufacture.

According to the invention, these tasks are not new woven cloth-like material released from under foaming fibrillate webs are formed and are particularly good as Carpet underlay that can be dyed on the surface is suitable, The main structural component of this non-woven fabric consists of a polypropylene-based resin material. One or more layers are on one or both surfaces of this layer a foamed fibrillated sheet made of a mixture of polypropylene with a hydrophilic resin. To this In this way, a surface that is receptive to dyes is achieved, and yet the overall strength of the final non-woven fabric or non-woven fabric -improved. In general the use of a mixture for the production of the surface sheet leads to a substantial improvement in the overall strength of the obtained nonwoven fabric material by weight compared with a product which the surface webs consist only of the hydrophilic resin. This fact seems to be due to the better binding of the mixtures can be traced back to the inner sheets based on polypropylene resin. The different tracks are made with the help of any suitable methods combined into a multilayer arrangement, like simply rolling up a few strips on one

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Carrier tape and overlaying some other layers in the transverse direction, so that cross machine direction strength is achieved in the final nonwoven fabric. the The combined layers are finally laminated together under the combined action of heat and pressure. If the simple application of Y / arms and pressure does not lead to the desired bond strength, an adhesive can be used. A suitable adhesive system is that the system has one or more films made of a polyolefin with a never, A lower softening point than the polypropylene-based resin, such as polyethylene, can be incorporated by simply rolling it up this film or films are made on one or more of the sheets made of polypropylene-based resin can while the layers of nonwoven fabric are superimposed.

The invention is described below with reference to the drawings. . .

It means:

Fig. 1 is a schematic side view of the device,

in which the foam extrusion and fibrillation

be performed.
Fig. 2 is a schematic side view of the laminating

contraption. '

As can be seen from Fig. 1, pellets are made of synthetic Resin to a feed hopper 1 or a feed metering device 2 together with any one required blowing agent supplied. The pellets out synthetic resin are released as free-falling pellets 5 at: a controlled rate from the feed metering direction 2 to the Filling hopper 3 of the extruder 4 is supplied. The extruder 4 is provided with a slot nozzle 6, the slot opposite the feed opening of the extruder is offset so that a sufficient back pressure can be built up, the ensures a uniform feed rate across the entire width of the nozzle. The Extruäat is made by a

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first pair of pinch rollers 7> 7 'added and subjected to a thickness reduction. When the extrudate emerges from the nozzle, it is quenched with air with the aid of a distribution head 8 for cooling air which has openings directed towards the extrudate. A hood 9 is provided to remove the gaseous blowing agent, which may contain toxic fumes, from the atmosphere. The first pinch rolls 7 »7 'are operated at a speed which is two to ten times the speed at which the polypropylene is fed through the extruder 4 to the lips of the nozzle 6. This measure causes the foam bubbles to break up as soon as they approach the lips of the nozzle 6 inside the nozzle, or immediately after their exit from the nozzle 6, whereby a foaming fibrillated web 1o of polypropylene is formed. The foaming fibrillated web is passed over a heated platen 11 and stretched by a second pair of pinch rollers 12, 12 '. In general, the second pair of pinch rollers 12, 12 'is operated at a circumferential speed which is two to eight times the circumferential speed of the first pair of pinch rollers 7 »7 ¹ , so that the foaming-fibrillated web 1q is oriented and thereby solidified. The foaming-fibrillated web 10 oriented in this way is then wound up on a reeling drum 13.

According to FIG. 2, a foaming-fibrillated web 15 made of resin based on polypropylene fed from a drum 14 onto a carrier tape 16. A layer of a binder film 17 is placed on the web 15 by the drum 18. An additional layer is formed from the drum 2o, which is attached by means not shown above a foaming fibrillated sheet 19 made of polypropylene resin is fed to a lapper 21. The lapper 21 includes a pair of powered pinch rollers mounted on a carriage. the Pinch rollers lead the fibrillated by foaming. Web on the binder film 17 while in the carriage

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backwards and forwards across the binder film 17 be moved. In this way the foaming f! Shone Web deposited at an angle of 45 to the machine direction (machine direction) in double thickness. From one The second drum 22 becomes a polypropylene resin sheet shining with foaming 23 passed through an overlapping arrangement 24 onto the overlapped web 21, which was brilliantly foamed, see above that two layers of foaming fibrillated web 23 be formed, each of which at an angle of 45 opposite is arranged in the direction of travel of the machine. An additional layer of binder or adhesive film 25 is applied unwound from the drum 26 and deposited on the surface of the foaming fibrillated web 23. A final Layer of foamed fibrillated sheet made from a mixture of polypropylene and a hydrophilic resin consists, 27, is applied by the drum 28 to the binder film 25 laid. The entire assembly made from under foams fibrillated Sheets and binder film is then removed from the carrier tape 16 removed and heated by laminating rollers 29> 29 "., Forming a non-woven fabric 3o, the is wound onto the reeling drum 31.

For the production of the fibrillated with foaming according to the invention Various extrusion and drawing methods can be used on webs. The preferred procedure is shown in the drawings. However, it can ■ for example, the extruder can be loaded by any other of a variety of known methods including manual loading from Säk- · ■ kens or containers with resin pellets. A punch extruder can also be used for low throughputs; apparently however, it is desirable to operate more or less continuously, and for this reason becomes a Screw extruder preferred. In the drawing, a slot nozzle is shown; this has proven to be most suitable for the formation of relatively narrow webs with a width of about 15 cm to 153 cm (6 inches to 5 feet). To the

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Production of wider webs of about 91 to 61o cm a ring nozzle has obvious advantages. If such a ring nozzle is used, the web is drawn over a mandrel, to maintain their scope while orienting or easy to increase.

The extruder used can be provided with an opening for injecting the blowing agent. Various blowing agents can be used in this embodiment, such as the various types of Freons, methylene chloride, nitrogen, carbon dioxide, and the like. If the extruder is not provided with an injection port for the blowing agent, the blowing agent is supplied to the extruder together with the resin. This can be done by coating the polymer pellets with a low-boiling liquid, such as pentane, which is converted into gaseous form in the extruder. However, it is preferred to mix a solid, physically or chemically decomposable blowing agent into the polymers and then to feed the resulting mixture to the extruder. Examples of suitable chemical agents include azobisformamide, azobisisobutyronitrile, diazoaminobenzene, 4,4 -'-oxybis (benzenesulfonylhydrazide),. Benzenesulfonylhydrazide, N, N ¹ -dinitrosopentamethylenetetramine, trihydrazinesym.-triazine, p, p'-oxybis- (benzenesulfonylsemicarbazide), 4-nitrobenzenesulfonic acid hydrazide, beta-naphthalenesulfonic acid hydrazide, and sulfonyl-4,4'-dzyrhydrazide, diphenidyl-4,4'-dzydrazide Substances such as sodium bicarbonate with a solid acid such as tartaric acid. The amount of foaming agent to be used in the process is generally in the range from 0.1 to 20 percent by weight of the resin to be extruded, preferably in the range from 0.5 to 5 percent by weight, based on the resin to be extruded.

The polypropylene used in the process of the present invention is isotactic polypropylene with a melt index of less than 25 g. Almost any commercially available one is suitable Polypropylene, regardless of whether it is intended for ■ molding compounds, foils or fibers. The polypropylene

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le can also be mixed with another polymer in an amount be mixed up to 25 percent by weight. Suitable other polymers generally include addition polymers with a Melt index from 0.1 to 15 g. Examples of such addition polymers are polyethylene with a density of 0.9 to 0.96, polybutene-1, polystyrene, ethylene-vinyl acetate copolymers and Polymethyl methacrylate. "

The surface layer or layers are preferably produced using the same process technology, however, a mixture of polypropylene and a hydrophilic or dyeable resin is used. To preferred hydrophilic resins include polyacrylonitrile, polyamides, polyesters, and ionomeric polymers. Preferred polyamides are poly (G-caprolactam), polyhexamethylene adipamide, polyhexamethylene sebacamide, Poly (co-aminoundecanoic acid), polyhexamethylene dodecanamide and copolymers of any of the monomers present in the foregoing polymers that are 5 to 50 percent by weight repeating units of the following structure:

These polyamides are generally usually solid and have a molecular weight of from 10,000 to 50,000. Preferred polyesters include polyethylene terephthalate) and poly (butylene-1,4-terephthalate). Preferred ionomers are copolymers which contain 0.2 to 25 mol percent, based on the monomer units in the polymer, of an οί, ^ δ-ethylenically unsaturated carboxylic acid with 3 to 10 carbon atoms or styrene sulfonic acid. Examples of such monomers are acrylic acid, methacrylic acid _? Ethacrylic acid, itaconic acid, maleic acid, fumaric acid, monoesters of the aforementioned dicarboxylic acids, such as ethyl hydrogen fumarate, ethyl hydrogen fumarate. and Maleinsäureandydridj mononitriles of the aforementioned dicarboxylic acids, such as / i-cyanoacrylic acid, and monoamides of the

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naof-itrgolloh changed

dicarboxylic acids mentioned above, such as pusaric acid monomethylamide. In general, it is preferred that the ester-forming alcohol or the amide-forming amine be an alkyl alcohol or an alkylamine in which the alkyl group contains up to 10 carbon atoms. The polymer may contain from 0.2 to 25 mole percent of the carboxylic acid monomer; however, the preferred range is 1 to 10 mole percent of the carboxylic acid monomer. The remainder of the copolymer consists of an α-olefin with 2 to 4 carbon atoms. In general, the ionomeric polymer has an inherent viscosity of at least 0.7, measured in a 0.5 weight percent solution of the polymer in dimethylformamide at 20 C. In general, from 30 to 80 % of the carboxylic acid groups are with an alkylenediamine with 1 to 10 carbon atoms or with Metal ions neutralized. Suitable metal ions include Na ⁺ , K ⁺ , Li ⁺ , Cs ⁺ , Ag ⁺ , Hg ⁺ , Cu ⁺ , Be ⁺² , Mg ⁺² , Ca ⁺² , Sr ⁺² , Ba ⁺² , Cu ⁺² , Cd ⁺² , Hg ⁺² , Sn ⁺² , Pb ⁺² , Fe ⁺² , Co ⁺ , Ni ⁺ and Zn ⁺ . In general, the mixture contains 1 to 80 percent by weight of polypropylene and 20 to 1 percent by weight of the hydrophilic resin. The more the hydrophilic resin can be colored, the less it is needed.

The resin extruded from the extruder is taken up by a take-up device such as a first pair of pinch rolls and is subjected to a reduction in thickness of about two to ten times. This reduction in thickness serves to cause the foam bubbles formed inside the nozzle to rupture as the resin approaches the nozzle, resulting in a web structure or web of intertwined and connected pibrils. When a resin is used based on polypropylene, the temperature inside the extruder, generally at 176.7 ⁰ C 287.8 ⁰ C is held until. If the polypropylene to the lips of the nozzle passes, the temperature in the range from 176.7 to 246.1 ⁰ C should be. As the polypropylene exits the lips of the nozzle, it is cooled, such as by air cooling, which ensures that the temperature of the polypropylene is below 170 ° C. or below its melting point.

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When a mixture of polypropylene and a polyamide resin is used, the temperature inside the extruder, generally at his 176.7 246.1 ⁰ C is maintained (35o to 475 ⁰ F) ·. When the mixture to the lips of the nozzle passes, the temperature in the range from 246.1 to 287.8 ⁰ C should be (475 to 55o ° F). As it emerges from the lips of the nozzle, the mixture is cooled to below 170 ° C. to ensure that fibrils are formed.

When a blend of polypropylene and a polyester resin is used, the temperature inside the extruder is generally maintained at 176.7 to 26o ° C (35o to 500 ° F). When the mixture to the lips of the nozzle passes, the temperature in the range from 246.1 to 287.8 ⁰ C should be (475 to 55o ° F). As the mixture exits the lips of the nozzle, it is cooled to below 17o C to ensure that fibrils are formed.

When a mixture of polypropylene and an ionomer resin is used, in general, the temperature inside the extruder at 176.7 to 232.2 ⁰ C (35o to 45o ° F) is maintained. As the ionomeric polymer approaches the lips of the nozzle, the temperature should be in the range of 176.7 to 204.4 ° C (35o to 400 ° F). As the ionomeric polymer leaves the lips of the nozzle, it is cooled to below 150 ° C., such as by air cooling, to ensure that fibrils form. After the formation of this foaming-fibrillated web, it is stretched two to ten times in order to orient the individual fibrils which form the web and in this way to consolidate the web.

According to the invention, the foams fibrillated webs bonded or glued together by any suitable means, such as the application of heat and Pressure so that a non-woven fabric is formed. If so desired one or more films made of thermoplastic resin with a softening point im Range of 8o to 17o ° C to be used · Are suitable

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-1ο-

also thermoplastic resins, which soften in the range from 80 to 170 ° C., in the form of emulsions or powders. Resins with softening points above 170 ° C. are not used because temperatures in excess of about 170 ° C. cause the polypropylene resin to lose its orientation. Resins with a softening temperature below about 80 ^° C. are also not used, since they can soften during use. Suitable thermoplastic resins for forming the adhesive films, powders or emulsions include, but are not limited to, the following polymers: plasticized or non-plasticized polyvinyl chloride, polyvinylidene chloride, polystyrene, and polyethylene. Unoriented polypropylene film can be used, but requires careful control of the conditions and is not preferred for this reason. Films made from resins other than polypropylene may or may not be oriented. Polyethylene resins in which the polyethylene has a density of 0.9 to 0.96 g / cm and a melt index of 0.1 to 10 are preferred. Particularly satisfactory resins are polyethylene resins and ethylene-vinyl acetate copolymer resins in which the copolymer contains from 10 to 40 percent by weight of vinyl acetate units.

The nozzle used generally has a nozzle opening of 0.17 mm to 1.27 mm (5 to 50 mils) in the direction of thickness of the extrudate, thereby yielding final, oriented, under vision, fibrillated webs weighing

2 2

3 »39 g / m to 6.78 g / m (0.1 to 2 ounces per square yard). In general, the total weight of adhesive used should be 3.11 to 15.52 g per 3.39 g / m ² (0.1 to 0.5 ounces per ounce per square yard) of the total foamed fibrillated webs in the final non-woven fabric.

The final nonwoven panel usually contains 3 to 2o layers. For most applications, such as industrial packaging in sacks or bags, as a primary carpet underlay, secondary carpet underlay

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Laying layer, as wallpaper material, upholstery underlayer material, 5 to 10 layers are used, and not that

2 2

woven material has a weight of 67.8 g / m to 339 g / m (2 to 1o ounces per square yard). There are numerous Methods by which the individual layers can be connected to one another. Often the way in that the webs are united with each other, depending on the purpose of use from which the non-woven material is fed. Usually this material comprises 2 to 4 layers in the machine direction and 2 to 4 under one Angle to deposited layers. However, the webs can be guided through a tenter frame to increase their width and to achieve a biaxial arrangement with regard to the direction of the individual fibrils inside the web. In this case, all tracks can be in the longitudinal direction deposited and laminated together.

If desired, a web. Or a strand (bat) that Containing fibers in random order, are made by mechanically removing the fibrillated sheets of polypropylene resin are torn, after which the resulting fibers are deposited from an air stream. This method Numerous specialized methods can be performed naph. Generally, the resulting strand weighs about

15 »52 g / m to 135» 7 g / m (0.5 to 4 ounces per square xard) and is used as the inner part of the non-woven structure, being on both surfaces of this inner web in the machine direction oriented webs fibrillated under foams are arranged, at least one of which can be dyed. - ·

For most applications, the preferred construction is to have two layers of film, one on each Side of two crosswise superimposed ^ polypropylene sheets fibrillated under foams are deposited, so that a total of four layers are obtained and one or two additional polypro-

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pylene webs simply deposited in the machine direction on each side and a layer of dyeable foaming fibrillated sheet. By choosing the lamination conditions (Temperature and pressure) and the texture of the laminating rollers or laminating press cannot be a final one woven fabric which is either fairly porous or impermeable to moisture.

For most purposes it is sufficient if a single surface layer of a fibrillated Web of a dyeable resin mixture is present. If the track is much lighter than usual, you can use up to five tracks be desirable. The dyeable fibrillated webs should not be more than 25 weight percent, preferably not greater than 20 percent by weight based on the weight of the final nonwoven material, independently whether they are on one or both sides of the nonwoven fabric. In general, the dyeable fibrillated sheet on the surface of the layers of fibrillated Polypropylene sheets are applied by simply placing a layer on top of it prior to performing the lamination step is unrolled without using criss-cross deposition or other more complicated procedures.

A press can be used to laminate the foamed fibrillated webs together to make individual laminates from about 15.2 cm square to about 122 cm by 244 cm (4 ft. By 8 ft.). In general, such a press is operated under a pressure of from 0.7 to 70.3 kg / cm (1 to 1,000 psi), preferably from 0.7 to 35 »^ 5 kg / cm (10 to 500 psi) and at 115 »6 to 143.3 ⁰ C (24o to 29o ° F). However, heated pressure rollers are used to make long rolls of the nonwoven material. In general, these are heated metal rolls, which are preferably made of steel, under a line pressure of 35 "7 kg / m to 893 kg / m (2 to 5o lbs. Per liner inch) at II5 to 154 ⁰ C (24o to 31o ° 3?) And the one to be laminated

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-'13 -

Material is fed at a rate of 305 cm to 167 »6 & (Io to 500 feet) per minute. The feel, appearance, porosity and other physical properties of the nonwoven material can be varied considerably by varying the strength of the lamination conditions within the parameters given above. In addition, these properties of the nonwoven fabric obtained as a product can be varied by using embossed or textured laminating rollers. If one (or both, if desired) of the laminating rollers (or a surface of a press, if one is used) is covered with burlap or a mesh of a suitable size, a non-woven fabric with a quilted appearance can be obtained in a simple manner.

The main application of the superficial according to the invention Dyeable, non-woven polypropylene-based fabric is the manufacture of carpet underlay and especially of primary underlay for long pile carpets; the surface-dyeable, non-woven material according to the invention, however, also brings advantages in applications such as packaging material and decorative Surface covering.

If desired, the fibrillated webs can also pass through machining a monoaxially oriented film can be made from the desired resin.

The invention is described below on the basis of preferred embodiments forms described. '"

A 2.54 cm Eillian type extruder with a screw with an L / D ratio of 24: 1, a 2o, 32 cm wide slot nozzle (Johnson Flex Lip Coat Hanger Type,) o, 51 now provided a strong opening. Der.Schiitζ is opposite the snail is offset by 25.4 cm and exbrudes in the same

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in the same direction as the flow through the extrusion cylinder. The extrusion hopper is continuously filled with a previously mixed material containing 100 g of polystyrene with a melt index of 5 »900 g of polypropylene with a melt index of 10 and 20 g of sodium bicarbonate. The latter stage of the extruder and the die are maintained at 232.2 ° C (450 ⁰ F). The screw is operated at 25 rpm with a feed rate of 2.72 kg (6 lbs.) Per hour. Immediately following the lips of the nozzle is an air cooling device consisting of two tubes 1.27 cm in diameter, one above the lips of the nozzle and the other below the lips of the nozzle, and air under pressure of 5 »624 kg / cm (80 psi). Each tube has a series of 0.76 mm diameter holes 3 »18 mm apart and facing the lips of the nozzle. The extrudate is drawn off from the lips of the nozzle with the aid of a first pair of pinch rollers with a diameter of 12.7o cm and a width of 20.32 cm, which is operated at a peripheral speed of 305 m / min, one with foaming fibrillated web is formed. These rollers consist of a driven rubber-coated roller and a loose roller made of stainless steel. The foaming-free sheet is then passed over a heated plate 20, 32 cm wide and 91 cm long. The plate is slightly curved in shape so that the foaming-fibrillated sheet is held in intimate contact with it. This plate is kept at a temperature of 130.degree. The web, fibrillated with foaming, is then passed between a second pair of Klenra rollers, which is the same as the first pair of pinch rollers, and then rolled up onto a winding drum. The second pair of pinch rollers is operated at a speed of 18.3 m / min. The resulting solid fibrous web is used as the base sample in the following examples.

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Example 1 is repeated, with the modification that the feed for the extruder consists of a mixture of 500 g of polypropylene with a melt index of 10, 5 og polycaprolactam with a flow index of 10 and 20 g of sodium bicarbonate. The temperature in the last stage of extrusion and nozzle is set to 232 ⁰ C bzw.265 ° C. The initial pulling speed is 4.27 m / min. (14 · feet per minute), the secondary pulling speed 11.9 m / min. . (39 feet per minute) and the plate temperature 11O ⁰ C, the resulting fiber web is used as a dyeable surface of a material.

Three layers of the fiber webs obtained in Example 1 are placed on top of one another to form a laminate so that the fibers in the first layer are oriented in a direction which would correspond to the machine direction in a continuous installation. The second and third layers are arranged in planes parallel to the first layer, but the fibers form an angle of 90 ° with respect to the fibers of the first layer, a cross-over layer being obtained. Then, again in a parallel plane, a 0.051 mm (2 mil) thick polyethylene film is placed on the sample. Finally, a layer of the fiber web according to Example 2 in a parallel '. Placed level in which the fibers are arranged in the same direction as the fibers of the first layer. The thus stacked specimen is placed between polished plates and placed in a press which is operated under a 'pressure of 9072 kg (22.86 cm χ 3o, 48 cm plates), and held for 3 minutes in this at 138 ⁰ C. After cooling, the resulting white fabric is removed from the polished plates, placed between nets made of stainless steel with a mesh size of 2.0 mm (1o mesh sieve) and pressed under a pressure of 4,536 kg for 30 seconds at 138 ° C,

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The resulting nonwoven fabric then has the appearance of a woven fabric. The fabric is then immersed in a 500 ml dye bath, which initially contained 2 g / l xylene milled blue (CI. Acid Blue 102) and 8 g / l ammonium acetate, and held therein at 100 ° C. for 15 minutes. The blue fabric obtained is washed thoroughly in cold water, then washed in a detergent solution of 90 ° G and finally rinsed in 70 ° C · warm water. It retained a deep blue color on the side that was formed from the fiber web according to Example 2, while only a little permanent color was achieved in the remaining portion of the sample. The sample had a digging tensile strength of 27.21 kg in the machine direction and 34- »o2 kg in the transverse direction.

Another sample of the same undyed, non-woven fabric is placed in a 5,000 ml dye bath at 100 ° C. for 30 minutes placed, initially 2 g / l Laty ^ L Cerise N (CI. Disperse Red 60 No. 5197) .. The resulting pink fabric is Washed thoroughly in cold water, then washed in a detergent solution heated to 90 ° C and finally in Rinsed with water at 70 ° G. The sample retains a deep pink color on the side that is formed from the fiber web according to Example 2, and a less intense pink in the rest Proportion of the sample.

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Claims (7)

7 * 38265 Pat en f "U) Oriented, foaming-fibrillated web based on polypropylene, characterized in that it consists of 3o to 8o percent by weight of polypropylene and 2o to 7o percent by weight of a hydrophilic dyeable one Resin and a weight of 3 * 39 g / m to 67 * 81 g / m. 2. Fibrillated web according to claim 1, characterized in that that it contains a polyamide as a hydrophilic dyeable resin. 3. Fibrillated web according to claim 2, characterized in that that it contains polyhexamethylene adipamide or poly-ε-caprolactam as polyamide. 4. Fibrillated web according to claim 1, characterized in that that it contains an ionomeric polymer as a hydrophilic dyeable resin. 5. Fibrillated web according to claim 1, characterized in that that it contains a polyester as a hydrophilic dyeable resin. • ■ 6. Fibrillated web according to claim 5, characterized in that that it contains as polyester polyethylene terephthalate). 7. Using an oriented ·, fibrillated with foaming Web according to one of claims 1 to 6 S09828 / 07SS changed Provided non-woven fabric with a weight of 67.81 g / m to 678.1 g / m, characterized in that, that it is fibrillated polypropylene or its mixtures with up to 3o percent by weight of polyethylene or polystyrene in the form of a nonwoven web and that on at least one surface of said web an oriented, foaming fibrillated web according to any one of claims 1 to 6 in one applied in such an amount as to constitute up to 25% by weight of the nonwoven fabric. B & hn «s / V? having:. 2. 509828/0753