DE1510629C3 - Process for the production of voluminous elastic fiber yarns - Google Patents

Description

3 4

or treated with steam for a short time, the small elastomeric fiber component, segment 2, is released from the weak connection points between the elastic, hard, inelastic component.
, see and the hard part of the bifilar fibers _R.

j largely. The inherently elastic threads, which example

ί stretched by the stretching described above 5 In a known manner, a 26.5% solution and of the hard fiber content in this layer were held by polyacrylonitrile in dimethylformamide with a strong pull together 26.7% Solution of a polyester urethane elastome - while taking the surrounding hard fibers into dimethylformamide simultaneously after the trokanalog the process in the development of a spinning process. A high-bulk yarn made of shrinking and io 72 hole nozzles is used, in which the two spinning solutions are combined with non-shrinking fiber components and are created right in front of the outlet opening. The temperature of the spinning chimney with strong loop and loop formation as well as that of the spinning high yarn volume. air located in the immediate vicinity of the spinneret at j In so produced are hard yarns and 210 ⁰ C. The takeoff speed is 200 m /! soft fibers so evenly distributed that the yarns 15 minutes.The total liter of the thread bundle is included! have a high elasticity, which are evenly 864 den. The sliver is stretched four times in boiling water over the entire length of the yarn and is continuously drawn in hot air: Of course, the yarns produced according to the invention can be dried at 130 ° C under tension. ¹ knitted or knitted articles or other textile fabrics, it is processed into staple fibers with a 65 mm jar and cut to the length described above. The fibers still own! _{Λ Only carry out} treatment in this state. their two-component structure and are unela- U Finally, treatment with boiling stisch.

j Water or steam already after parallelization. A staple fiber sample takes about 2 minutes

i treated cards or cords with water vapor at about 100 ° C before the actual finish, whereby I made spinning. The spinning of such a hard acrylic component under loop j However, the material then requires special stretching and looping of the soft elastomer Factory setting on the processing machines. component separates The elastomer component that

In the figure, such a bifilar fiber has shrunk by around 50 to 60%, the titer Section shown. The segment 1 consists of the thread 30 3 den.

1 sheet of drawings

Claims (1)

1 2 soft and highly elastic fibers perfectly Parallelize patent claim and close them intimately with the hard fibers 'mix. The big differences in the mecha nical technological properties between hard Processes for the production of voluminous and soft fibers make the production of an elastic one difficult Fiber yarns made from hard and soft wall-free blended yarns that meet the high demands of elastomers Thread components should be split bends. filar threads, characterized in that, furthermore, from the Belgian patent specification 586 958 that one bifilar thread, consisting of a hard one known that composite thread, which consists of hard and white and a soft elastomeric component to io chen elastomeric thread components, Staple fibers cut, the fibers obtained al- by the action of steam or boiling or in a mixture with conventional chemical water with simultaneous separation into the mie or natural fibers shrunk on known spinning hard and soft thread components machines can be processed into a yarn and attached. The resulting structure represents closing the yarn in boiling water or a bundle of hard and soft filaments, Water vapor shrinks out. that should be similar to a staple fiber yarn and there achieved with a wool-like character. Since the wool is a product made from staple fibers is made, is the wool-like cha- 20 character through the use of a continuous thread product can only be approximated. The invention is based on the object of creating a method with which in a simple manner Process for the production of yarns from natural voluminous, elastic thread yarns are produced Chemical or synthetic fibers are generally available. knows. This can be done with natural fibers like wool. This task is done with a process like it or cotton and synthetic fibers, for example in the preamble of the claim, wise from polyacrylonitrile, polyamides, polyesters solved according to the invention in that one bifilar hair. a. be used. The fibers can also be used in the den, consisting of a hard and a soft one any ratio mixed with each other to cut 3 ° elastomeric component to staple fibers, can be processed. Such yarns have the fibers obtained alone or in a mixture with generally only a small volume (low volume of conventional chemical or natural fibers), Tear strengths in the range from about 10 to known spinning machines processed into a yarn-18 Rkm and elongations at break between about 15 to beitet and then the yarn in boiling 20%. The yarns have only a low level of elasticity. 35 Water or steam shrinks out. It is also already known, according to conventional The present invention is based on a ver Process produced mixed yarns a special drive, hard and soft (elastic) fibers with a bulkiness to lend by mixing these from mingle, but with the soft fascinations carded or crimped by non-shrinking and shrinking ones in an inelastic state Fibers are produced, of which the former 4 ° pelt and only in the finished yarn their elastic fiber type e.g. regain their original state in boiling water. The temporary lent length or changes it only insignificantly, elimination of the soft nature of the elastic thread others, however, experiences a shrinkage that z. B. the, d. H. the temporary transformation of the soft Fä-20 Can be Vo or more. The shrinking den in hard threads, happens by special kind Fibers pull together and cause 45 thread production. It will be known in that the non-shrinking fibers in a loop-like manner from a spinneret two components and loop formation, thereby increasing the spun at the same time, one of which is elastic increase of the yarn volume is brought about. Also has properties and the other has a hard fiber this, known under the name of »high pile yarn«, yields z. B. a solution of a polyester or polyte Yarns do not have any particular elasticity. 5 ° ether urethane segment polymers and a solution of Furthermore, a method is known with its polyacrylonitrile. The two components will be like this Help succeed in producing elastic fiber yarns. merged that they are immediately at or in the Here, however, in addition to conventional ones, so- spinnerets flow together and have a common one named hard fibers with tensile strengths of thread, but of two discrete halves about 1.5 to 5.0 g / den and elongations at break of about 55 th in the direction of the thread axis. After this 15 to 60% also soft elastic fibers with tear-stretching of the threads and drying under tension elongations of around 300 to 700% with low EIa, they only have the low elastic modulus of elasticity in the range from about 0.6 to 0.8 g / shafts of the hard fibers, since the stiff hard fiber content The one used, for example, according to the USA patent, the soft elastomer thread in a tensioned state 3 047 909 can be produced. The Garnher- 60 holds on. position z. B. according to the United States patent 3 007 227 results Such bifilar threads can be mechanically One-web with high elasticity and a large volume process, curling, cutting into stacks and mening. In this known process, hard fibers, pure or in a mixture with other hard fibers such as staple fibers, are mixed with elastic staple fibers, these are processed on conventional spinning machines and processed under special processing conditions. The yarns spun in this way are first spun into yarn. This process has various elasticities that are not worth mentioning and without any particular disadvantages. So it is z. B. with conventional bulk.
Spinning machines extremely difficult, but these yarns are made in boiling water