EP3412817A1 - Maillage d'élevage piscicole sans noeuds - Google Patents

Maillage d'élevage piscicole sans noeuds Download PDF

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Publication number
EP3412817A1
EP3412817A1 EP18176657.7A EP18176657A EP3412817A1 EP 3412817 A1 EP3412817 A1 EP 3412817A1 EP 18176657 A EP18176657 A EP 18176657A EP 3412817 A1 EP3412817 A1 EP 3412817A1
Authority
EP
European Patent Office
Prior art keywords
threads
grid
webs
carrier
lattice
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP18176657.7A
Other languages
German (de)
English (en)
Other versions
EP3412817B1 (fr
Inventor
Jörg Eßling
Heiko Pintz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huesker Synthetic GmbH and Co
Original Assignee
Huesker Synthetic GmbH and Co
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Filing date
Publication date
Application filed by Huesker Synthetic GmbH and Co filed Critical Huesker Synthetic GmbH and Co
Publication of EP3412817A1 publication Critical patent/EP3412817A1/fr
Application granted granted Critical
Publication of EP3412817B1 publication Critical patent/EP3412817B1/fr
Active legal-status Critical Current
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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B21/10—Open-work fabrics
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2403/00—Details of fabric structure established in the fabric forming process
    • D10B2403/01—Surface features
    • D10B2403/012—Alike front and back faces
    • D10B2403/0122—Smooth surfaces, e.g. laminated or coated

Definitions

  • the invention relates to a knotless fish breeding grid, with a rectangular lattice structure formed by longitudinal lattice webs and transversely extending transverse lattice webs.
  • Nets are used to form aquaculture cages in aqua farms, with a diameter of more than 100 m.
  • the nets are provided with sewn-on straps to attach them to buoyancy bodies.
  • the nets are brushed under water or completely removed from the water and washed. Conventional nets scrub in the cleaning process partly, especially because of the rough seams, and must then be manually patched.
  • fishing nets are made of strings, whereby at the crossing points in each case a knot takes place; the connection of strings over nodes also corresponds to the original definition of a network.
  • the DE1585538A describes a knotless braided net and its manufacture. From the WO2011 / 155847A1 there is known a similar knotless fish farming grid having monofilament meshes formed by Raschel knitting processes. Longitudinal webs and transverse webs are similar formed, each consisting of at least four interwoven threads so that longitudinal and transverse grid webs are relatively thick, thereby forming a large surface for the settlement of marine organisms such as a large flow resistance.
  • the DE 43 01 232 C2 describes the production of a net-like fabric by a knitting process. However, this aims at a high structural variability, that is, the mesh size should be easy to change, which is diametrically opposed to the application as a fish breeding grid. If a higher mesh stability is to be achieved, chemical and thermal fixations are proposed by which the thread strength is reduced.
  • the object of the invention is to provide a knotless fish breeding grid with high mesh stability, which is resistant to wear and easy to clean and which even with smaller mesh sizes has a small web width to keep overall the flow resistance of the fish breeding grid in the water.
  • the coating is preferably carried out by the known plastisol dipping method.
  • a plastisol is a physical mixture of a powdered thermoplastic polymer and plasticizers.
  • the plastisol mixture is stably storable without gelling. Only by tempering, ie heating for a few minutes at typically 160 to 180 ° C, the mixture by partial evaporation of the plasticizer to a permanently viscoelastic plastic.
  • the fish breeding grid according to the invention is therefore initially finished and then passed as a finished web through a plastisol dip, the Grid - as described - under tension. After passing through the dipping bath, it passes through at least a pair of nip rolls to strip off excess plastisol. Thereafter, the annealing is carried out by heating to about 180 ° C. This creates a solid, but flexible and elastic coating that completely encloses the threads in the longitudinal and transverse webs.
  • polyurethane coatings can also be used.
  • the mesh size can be up to 35 mm, depending on the fish species to be cultivated, but is typically only about half. According to the invention, it is particularly possible, even with small mesh sizes of, for example, 17 mm to keep the plastic-coated webs narrow with only 2 - 3 mm web width and a width ratio of web width to mesh size of about 15%: 85% not to be exceeded.
  • FIGS. 1 to 3 show progressively more and more details on the structure of a fish breeding lattice 10 according to the invention, wherein the order of the graphical representation of the components in the figures does not match the production order.
  • FIG. 1 shows four carrier threads 1.1, ..., 1.4.
  • the production direction runs, as indicated by the block arrow, in the vertical direction. Every carrier thread 1.1, ..., 1.4. is laid meandering for itself, that is, in alternating sequence legs are formed, which run longitudinally - in the direction of production - and then again across it. As a result, first parts of transverse and longitudinal lattice webs 5, 6 are created.
  • the touching corners of adjacent carrier thread 1.1, ..., 1.4 represent the later crossing points 7.
  • the length of the vertical and horizontal sections is the same size, but also the setting of different lengths is possible if rectangular grids are to be formed.
  • adjacent carrier threads are alternately dashed and drawn with solid lines. All adjacent carrier threads 1.1, ..., 1.4. but they are actually similar. They consist of synthetic fiber multifilaments and have the same titer.
  • FIG. 2 is a second group with other carrier threads 2.1, 2.2, 2.3, 2.4 added, which are also shown by dashed lines and drawn by solid lines to distinguish.
  • Added carrier threads 2.1, 2.2, 2.3, 2.4 are each drawn here as double lines. They have the same meandering configuration as the first group of carrier threads 1.1, 1.2, 1.3, 1.4, except that they are arranged offset by a length of a longitudinal web 6 to the first group, so that in each case a longitudinal web of the first group of carrier threads 1.1, 1.2, 1.3, 1.4 rests against a longitudinal web of the second group of carrier threads 2.1, 2.2, 2.3, 2.4 without being connected thereto.
  • the first group of carrier threads 1.1, 1.2, 1.3, 1.4 is a mirror image of the second group of carrier threads 2.1, 2.2, 2.3, 2.4. Due to the fact that in each case one carrier thread of the first and the second group in each case via a Crossing point 7 runs, results in the good mesh stability according to the invention.
  • the binding threads 3.1, ..., 3.5 are indicated here only as zig-zag lines. However, it is in each case a knitted fabric of a binding thread per longitudinal web, by which two longitudinal webs of adjacent carrier threads 1.1, ... 1.4, 2.1, ..., 2.4 are enveloped and wherein in particular the intersection points 7 are involved without the crossing points 7 node formation takes place.
  • FIG. 3 are the binding threads 3.1, ..., 3.5 each still not quite up to the upper edge of the grid of carrier threads 1.1, ... 1.4, 2.1, ..., 2.4 laid.
  • the wales are formed continuously on a warp knitting machine from the binding threads 3.1, ..., 3.5. Before that, a new, U-shaped loop is placed in each case by means of partial weft insertion in all adjacently guided carrier threads, before the longitudinal webs of the adjoining webs of the first and second groups of carrier threads are reached by the respective binder thread and enclosed in a loop formed by the binder thread ,
  • the meander shape in the course of the carrier threads 1.1, ... 1.4, 2.1, ..., 2.4 has the advantage that in the finished grid, the transverse and longitudinal parts of the grid can not be moved against each other without effort, although at the intersection points no knotting or welding takes place, but the crossing point is fixed only by the inclusion in the binding thread.
  • a knotless fish breeding grid 10 is created, which already in the raw state, ie without coating, has a high stitch stability. If you reach into the mesh of the knitted fish breeding grid, they are not easy to expand. Thus, even in the raw state, there is no danger of the mesh expanding itself through the activities of the trapped fish or even due to penetrating foreign bodies.
  • the loosely adjacent transverse webs of the carrier threads can be gripped and pulled something from the running in the longitudinal direction, wrapped by the binding threads section. For this, however, a greater force is already required, which also does not lead to larger shifts in the lattice structure, but at best has an effect on the immediately adjacent portion of the same carrier thread until the next 90 ° turn.
  • the stitch stability increases in the preferred embodiment of the invention, which provides a complete covering of all webs of the fish breeding grid 10 with a PVC coating, for reasons of antifouling protection and improved cleaning possibilities alone. Due to the PVC coating, not only are all the transverse and longitudinal webs completely encased and partially glued together, but in particular the crossing points are additionally fixed and the stitch stability with the coating is further increased.
  • the coating forms a smooth surface, reduces the attachment of marine organisms such as algae and barnacles, and facilitates subsequent cleaning of the fish farm lattice 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Farming Of Fish And Shellfish (AREA)
  • Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
EP18176657.7A 2017-06-08 2018-06-07 Maillage d'élevage piscicole sans noeuds Active EP3412817B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017112675.9A DE102017112675B4 (de) 2017-06-08 2017-06-08 Knotenloses Fischzuchtgitter

Publications (2)

Publication Number Publication Date
EP3412817A1 true EP3412817A1 (fr) 2018-12-12
EP3412817B1 EP3412817B1 (fr) 2022-02-16

Family

ID=62567513

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18176657.7A Active EP3412817B1 (fr) 2017-06-08 2018-06-07 Maillage d'élevage piscicole sans noeuds

Country Status (2)

Country Link
EP (1) EP3412817B1 (fr)
DE (1) DE102017112675B4 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2992550A (en) * 1959-05-13 1961-07-18 Hagin Frith & Sons Knitted mesh
GB918352A (en) * 1958-03-22 1963-02-13 Adolf Van Laethem Method for manufacturing knitted nets and products obtained thereby
DE1585538A1 (de) 1965-03-18 1973-05-24 Inst Hochseefischerei Knotenloses geflochtenes netz und einrichtung zur herstellung desselben
DE4301232A1 (de) 1993-01-19 1994-07-21 Olbo Textilwerke Gmbh Verfahren und Einrichtung zur Herstellung textiler netzartiger Flächengebilde
EP1498528A1 (fr) * 2003-07-15 2005-01-19 Ykk Corporation Fermeture de surface en bouclette tricotée
WO2011155847A1 (fr) 2010-06-11 2011-12-15 Damgaard Marine As Filet à utiliser pour l'élevage de poissons, procédé de production du filet et utilisation de celui-ci

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013014586B4 (de) * 2013-08-29 2017-02-16 Sächsisches Textilforschungsinstitut e.V. Knotenlos gewirktes Netz mit diagonalem Schussfadenverlauf und Verfahren zur Herstellung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB918352A (en) * 1958-03-22 1963-02-13 Adolf Van Laethem Method for manufacturing knitted nets and products obtained thereby
US2992550A (en) * 1959-05-13 1961-07-18 Hagin Frith & Sons Knitted mesh
DE1585538A1 (de) 1965-03-18 1973-05-24 Inst Hochseefischerei Knotenloses geflochtenes netz und einrichtung zur herstellung desselben
DE4301232A1 (de) 1993-01-19 1994-07-21 Olbo Textilwerke Gmbh Verfahren und Einrichtung zur Herstellung textiler netzartiger Flächengebilde
EP1498528A1 (fr) * 2003-07-15 2005-01-19 Ykk Corporation Fermeture de surface en bouclette tricotée
WO2011155847A1 (fr) 2010-06-11 2011-12-15 Damgaard Marine As Filet à utiliser pour l'élevage de poissons, procédé de production du filet et utilisation de celui-ci

Also Published As

Publication number Publication date
DE102017112675B4 (de) 2021-06-10
EP3412817B1 (fr) 2022-02-16
DE102017112675A1 (de) 2018-12-13

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