Method and composition for treatment of nets for aquaculture

A technology of uses, biocides, applied in the direction of chemicals for biological control, botanical equipment and methods, applications, etc., can solve the problems of expensive, time-consuming, long drying time, etc.

Pending Publication Date: 2021-12-03
ARXADA LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The process of applying antifouling coatings to these large webs via the conventional dip and dry process described above is time consuming and expensive as it involves high coat weights relative to web weight
In addition, the coating obtained by this dipping process is often incomplete and uneven and requires a long drying time

Method used

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  • Method and composition for treatment of nets for aquaculture
  • Method and composition for treatment of nets for aquaculture
  • Method and composition for treatment of nets for aquaculture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Embodiment 1: Preparation according to the antifouling preparation of the present invention

[0065] Table 1: Micronized Cu 2 Preparation of O dispersion

[0066]

[0067] The Cu 2 O dispersions are used to prepare antifouling formulations.

[0068] Table 2: Preparation of antifouling formulations*

[0069]

[0070] *Specific gravity = 1.289, % solids weight = 36.83, % solids volume = 28.

[0071] The particle size distribution curves of the antifouling formulations of Table 2 have been determined by laser light scattering analysis. The resulting particle size distribution curve (particle size as a function of % particle accumulation relative to the total sample) is depicted in FIG. 1 .

[0072] The median and average particle sizes calculated from this curve were about 0.81196 μm and about 0.98811 μm, respectively. Particle size values ​​for selected cumulative % of particles are described in Table 3. The d-values, in particular d10, d50 and d90, have be...

Embodiment 2

[0076] Embodiment 2: Comparison of fishing nets

[0077] The feasibility of applying the antifouling formulation via the method of the invention to fishing nets ("experimental nets") was compared with nets impregnated with the antifouling formulation of Example 1 alone ("control nets"). The fishnet used for this comparative test was a commonly used nylon fishnet.

[0078] For the test mesh, approximately 30cm x 30cm nylon mesh was cut into small pieces and rolled into a bundle. The bundle was placed in an aluminum pan filled with the antifouling formulation according to Table 2. The disc was then placed into a laboratory scale pressure vessel with fittings to allow both vacuum and pressure to be applied. A vacuum of about 0 kPa was applied for a period of 30 minutes. After 30 minutes, the vacuum was released and the antifouling formulation was removed by decanting. The web was then again subjected to a vacuum of about 0 kPa for 30 minutes to remove any antifouling formul...

Embodiment 3

[0088] Example 3: Penetration Depth of Antifouling Marine Coatings in Fishing Nets

[0089] The penetration depth of marine antifouling formulations into fishing nets was compared for two different application methods and two different antifouling formulations. The two antifouling formulations used were the antifouling formulation of the invention ("experimental antifouling formulation"), ie according to Table 2, and the "competitor's" antifouling formulation ("competition"). "Competitor's antifouling formulation" means a typical commercially available antifouling formulation; it is highly similar to the antifouling formulation of the present invention ("experimental antifouling formulation"); The main difference in antifouling formulations is that the active agent is not in micronized form. The two methods compared are the vacuum process according to the invention (vacuum, experiment) and the conventional impregnation method (impregnation, comparison).

[0090] Table 5: P...

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PUM

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Abstract

The present invention provides a process for treating and drying a marine or submarine textile material to inhibit bio-fouling thereof. The invention further provides a marine or submarine textile material with anti-fouling properties obtained by the process of the invention, as well as the use of an anti-fouling formulation according to this invention for inhibiting the bio-fouling of marine and submarine textile materials.

Description

technical field [0001] The present invention relates to a method for inhibiting biofouling of marine aquaculture nets, the use of the method and nets treated with the method. Background technique [0002] Surfaces submerged in seawater can quickly become covered with marine life, known as marine biofouling or generally biofouling. Fish nets used in marine aquaculture are known to become contaminated within a short period of time, leading to low oxygen levels in the nets, which affects fish growth and prevents fish waste from draining out of the nets. For this reason, fishing nets used in marine aquaculture are often coated with an antifouling coating. [0003] In a common antifouling treatment process, the mesh is dipped and dried by hanging in the air or in a hot air stream. These nets are usually large nets, often exceeding 50 meters in diameter, and are therefore usually transported in bundles to an 'anti-fouling treatment facility'. These bundles are then unwound and ...

Claims

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Application Information

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IPC IPC(8): A01N25/26A01N59/20A01P1/00
CPCA01N59/20A01N59/16A01N43/80A01P15/00A01N25/26A01N25/34A01N43/40C09D5/1618
Inventor 保罗·卡波克布列塔尼·考德威尔彼得·范阿肯杰伊·帕特尔凯文·E·贾纳克金乐红萨克·欣克尔贾斯廷·麦肯德
Owner ARXADA LLC
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