Textiles: spinning – twisting – and twining – Strand structure – Covered or wrapped
Patent
1996-07-18
1998-06-30
Stryjewski, William
Textiles: spinning, twisting, and twining
Strand structure
Covered or wrapped
57232, 57240, D02G 336
Patent
active
057716730
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a line, in particular a fishing line, and to a method for the production of such line.
In the case of lines, in particular fishing lines, one differentiates between two different basic concepts, namely monofilic lines, on the one hand, and braided lines, on the other hand.
Monofilic lines have been known for a long time and are available in various implementations. In their fundamental structure they consist of a monofilament which, as a rule, is coated. In DE 24 16 488 A1 using as an example a fishing line, it is suggested to provide a monofilament with a twofold coating wherein the first coating comprises microvoids to increase the buoyancy and the second superjacent coating is to ensure the desired fatigue strength. Further examples of monofilic fishing lines are disclosed in GB 1 526 755 and U.S. Pat. No. 5,207,732. In both of the latter cases a core comprising nylon is used which is said to ensure the desired fatigue strength. Additional coatings are provided in order to achieve sufficient durability and to lend sufficient intrinsic stiffness to the fishing line.
Such monofilic fishing lines are very cost-effective, they have, however, a comparatively low bearing capability and are subject to high wear-and-tear. For this reason they are only suitable for specific less demanding application purposes.
Furthermore, braided lines are available which have a core and a sheath encompassing the core. The core as well as also the sheath are formed of high-strength filaments. Such line in the form of a fishing line is, for example, described in DE 81 29 505 U1. It comprises a textile core of a large number of synthetic textile fibers of high strength, namely for example aramide fibers. The aramide fibers extending essentially axially are encompassed by a braiding of special steel wire. This permits implementing a fishing line of high strength and bearing capability which is simultaneously flexible which is a particularly important desired characteristic.
A comparable fishing line is disclosed in GB 1 399 995. Therein a core comprising textile filaments is embraided by filaments which are also textile filaments and is subsequently coated to protect it against damage.
However, of disadvantage in the embraided fishing lines is their high price brought about through the expensive embraiding of the core. They are therefore only used for very specific application purposes which cannot be served by the monofilic fishing lines. Within this scope should also be understood as cast leader the specific application of the fishing line known from DE 81 29 505 U1 since the issue there is to ensure sufficient biting strength of the fishing line.
The invention therefore addresses the problem of further developing a line, in particular a fishing line, of the initially cited type such that it no longer comprises said disadvantages. A line, in particular a fishing line, was to be created which has high bearing strength with low wear-and-tear and simultaneously is produced cost-effectively. It should, in particular, be universally applicable and easy to handle.
The invention is based on the idea of forming the sheath by entwining the core with filaments and to stabilize the line by bonding. Such line can be fabricated extremely cost-effectively since the entwining can be accomplished in simple ways. In addition, it is possible to optimize exactly the structure in view toward strength, mechanical properties, purpose of application etc. since with respect to the realization of the core as well as also in particular with respect to the sheath hardly any restrictions exist. Through the corresponding selection of the filaments forming the sheath and the number of twining turns properties such as resistance to tearing, stretching behaviour, volume, density, stiffness or optical quality can be varied.
It is especially advantageous if the bonding is realized with a fusion-adhesive yarn, which is integrated into the line and completely fused and incorporated in the finished product. This yields an ideally homogeneou
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Lozetex-Zwirne GmbH, et al
Stryjewski William
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