JPS6094046A - Material for preventing fouling of aquatic organism - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention The present invention provides stain resistance, corrosion resistance, strength, abrasion resistance,
The present invention relates to a material for preventing the adhesion of aquatic organisms.

For example, as wire mesh for aquaculture raw juice, galvanized iron wire wire mesh, copper alloy wire wire mesh, chlorinated vinyl resin coated wire mesh, pure copper powder-containing polyurethane resin coated wire mesh (Patent Application Publication No. 52534), etc. have been used in the past. However, galvanized iron wire mesh has poor stain resistance, corrosion resistance, and abrasion resistance.
It is easy for shellfish such as mussels, Fujibbo, and Kasanekansashi to adhere to it, and cleaning is required two to three times a year.The work is done in seawater, which is quite expensive, and the zinc used for plating is Since it is leached into seawater, there is a high incidence of deformed fish due to its toxicity, and the zinc used to protect the iron wire is leached out, leading to faster corrosion. In addition, when the contact parts of the wires are rubbed and moved by waves or the movement of schools of fish, the material itself is exposed, which leads to faster corrosion.It must be replaced every 1 year to 1 year and 6 months, but corroded iron Most of the nets are thrown into the ocean, which is prohibited, because they have trouble finding a place to dispose of them, causing ocean pollution. Recently, copper alloy wire mesh has come to be used instead. Compared to galvanized wire mesh, this mesh has better antifouling properties, corrosion resistance, strength, and wear resistance, and also improves the growth of cultured fish due to the effect of copper ions eluted from the copper alloy. Also, the incidence of deformed fish is low,
Corrosion resistance in seawater is good, but there is a big difference in the corrosion of the catchment area depending on the installation location, and there are fishing grounds where it is corrosion resistant for about 6 years, and fishing grounds where it is corroded and becomes unusable after about 6 months of J year, so this point is important. That's a problem. Therefore, vinyl chloride resin-coated wire mesh or nylon resin-coated wire mesh, which have relatively stable corrosion resistance, abrasion resistance, and strength, are used, but these have no stain resistance at all, and in particular, the resin contains mussels, mussels, etc. Because shellfish algae such as Fujibbo and Kasane Kanzashi prefer to adhere to it, cleaning is required 4 to 5 times a year, and since it is done in seawater, the work efficiency is poor and the cost is considerable. It is true that this is putting pressure on business operators. Taking these points into consideration, the present inventor previously invented a polyurethane resin-coated wire mesh containing pure fine copper powder (patent application publication, 1984-52584). This is due to the fact that it has good stain resistance, corrosion resistance, strength, and abrasion resistance, but it is expensive and stains adhere to it. This does not naturally fall off after about 2 to 3 months, so it cannot be said to have the best antifouling properties. Mataji's (b)
Conventionally, polyethylene resin has been mainly used for fishing nets and ropes attached to fishing nets. This is primarily because it is cheap and easy to handle, which is why it is widely used.

But this also has major drawbacks. The reason is that it has no antifouling properties, so mussels, barnacles, snails, etc. can easily adhere to it. When shellfish are attached to fishing nets for cattle, they are easily susceptible to injuries caused by slipping in the nets or entanglement in the nets, purulent diseases, etc., which can lead to death. The reason for this is that the shape of the wire mesh for cattle is not always constant, and the wire mesh for cattle is deformed by waves or water currents and tides caused by the movement of schools of fish. Since even the slightest amount of shellfish algae, such as Kasanekansashi, does not adhere, disinfection with fresh water is unavoidable, but if this is done, some percentage will always die and the yield will be poor. Also, the length of the netting period varies slightly depending on the season, but the netting is done every 1 to 2 months, and the dirty nets are first washed and dried in the sun for 2 to 3 days, then washed with a poisonous cloth that also serves as a disinfectant. After soaking in a strong tin-based dye for 5 to 6 hours, it is dried in the sun again before use, but as it is highly toxic, it cannot be used on fry or young fish at all, so the cultured fish grow large enough to develop resistance. Since you have to use it only for cleaning for about 4 to 5 months until it sticks, during that time your thin neck will become frequent, and each time you will die from a high percentage of injuries due to mesh misalignment, etc.
Yields are low, and labor costs are high, putting pressure on the management of fish farmers. Also, recently, they have given up on marine aquaculture, and have started using relatively high-priced aquaculture.
Although aquarium culture in which high-quality fish such as flounder and pufferfish are cultivated on land has become popular, this aquarium culture also has its flaws.

The problem is that algae, shellfish such as Fujitbo quickly adhere to the surface of the aquarium. In this case, a polyethylene resin sheet is placed inside the aquarium to make it easier to remove attached algae, Fujibushi, etc., but it must be replaced every 10 to 15 days, and each time, the cultured fish inside must be replaced. Since the fish is replaced after being transferred to an empty aquarium, it may cause stress, and when replacing the fish, there may be scratches caused by attached Fujibo, etc.
The bacterium becomes suppurative and spreads from the affected area, and in some cases up to 70 to 80% of the infected people die. Also, in aquarium culture on land, it is essential to constantly introduce seawater, but for fish farming it is preferable to introduce seawater with as little pollution as possible, so it is best to introduce seawater from as far offshore as possible. It absorbs water, but even in the best location it is 50-60%
Depending on the location, water must be absorbed from a depth of 100 to 1597 nm, but the water pipes are usually 5 nm thick.
A vinyl chloride resin pipe with an outer diameter of 150 to 200,711 ff is laid, but the problem is that it is impossible to remove the barnacles that adhere to the inside of the water pipe.

Fujibbo in particular has the property of preferring to attach to resin and dark places, so its reproductive power is tremendous, and within a pipe with an outer diameter of about 200 πm, it is almost completely blocked in about 1 year and 6 months. As a result, the amount of water absorbed decreases to about 7 in about a year, making it necessary to replace the water pipes in a little over a year, which also puts pressure on the management of aquaculture and businesses. This is the current situation.

Next, at fishing ports across the country, a portion of the area is designated as a place for repairing small fishing boats and repainting the bottom of the boat.
0-30m length approximately 40-50189. Although it is sloped toward the sea, algae tends to grow on the concrete surface, and it becomes slippery when walking on it at times of 1,000 to 10 days. At some fishing ports, accidents have occurred where fishers accidentally slip and fall during repair work, resulting in serious injuries or even death due to hitting the back of the head, and fishermen's unions in various places are struggling to find countermeasures. It is also q1 fruit.

Also fishing 1fly:) etc. t:I! The bottom paint-C used to be a tin-based paint that was highly toxic or had a good stain resistance of 1/l, so its anti-fouling effect would last for about a year. In recent years, due to marine pollution issues, tin-based ships can no longer be used with tin-based paints, so paints with less toxic PIX have been used instead. /Il etc. are not very effective, so it will take about 6 to 7 months. If so, do you have to remove it completely and repaint it?
Among shellfish algae such as mussels, Fujibbo, and Jiki->J Nekansashi, Fujibbo has several -C times the strength of other shellfish, so 1=+ Even if it sticks to concrete 1, its adhering force is so strong that if you force it off, it will destroy the concrete in that area. 2. It is a truly troublesome shellfish that has the property of easily attaching itself to any substance. It was necessary to completely remove such a unique shellfish, which required a great deal of effort and expense.

Recently, some ships have been covered with copper alloy plates as an alternative to bottom paint, which has low antifouling properties. For small ships and fishing boats, the ratio of copper alloy price to ship price is t + J compared to large ships, and at the same time, for fishing boats, most of them are J" RP. Since it is a resin layer, there are problems with adhesion technology to the copper alloy, and most ship owners or small businesses cannot afford to use expensive copper alloy plates.
Economically, it is close to impossible.

The above is just one example related to the fisheries industry, and other examples include, for example, turpentine cooling water pipes and drainage pipes in nuclear power plants, which have been increasingly installed in recent years. The labor costs involved in removing snails such as mussels and Fujibbo 4 are enormous. Considering these things, it is important to keep in mind that aquatic life such as equipment and all other marine structures.
Regarding the adhesion prevention material It, the present inventor has begun research into a polyurethane resin layer material that is even better than the previously invented material for the polyurethane resin layer made by combining 64 pure copper powders (published patent application, 1987-5234). The conditions are that it has excellent stain resistance and durability, as well as corrosion resistance, strength, abrasion resistance, and a low price. Keeping in mind that it can be used, as a result of immersing myself in the research, diligent research, and repeated experiments, I found out from among the Nine Tenshi #-based resins that were considered to be rear grass blades with no staining properties at all. , nylon 6
, or nylon 66 resin or (a), (b), and (c) above)
It was discovered that this material is most suitable for the following materials. This aquatic life-preventing material, which is made by mixing pure fine copper powder with nylon 6 or nylon 6G resin, has better stain resistance and corrosion resistance than the polyurethane resin layer that is mixed with pure copper powder. , strength, abrasion resistance, good fit, and especially excellent stain resistance.
Not only is there no adhesion of shellfish algae such as mussels, Fujibbo, and Kasanekansashi, but also other aquatic organisms, it has antifouling properties that were not possible with the above-mentioned polyurethane resin material mixed with pure copper powder. The best feature of this invention is that it can manufacture fishing nets, raw yarn for manufacturing ropes attached thereto, and pipes. In addition, compared to the above-mentioned polyurethane resin layer mixed with pure copper powder, the material cost of the nylon 6 resin material mixed with pure fine copper powder of the present invention is about 4°; The mixed nylon 66 resin material is about ~.From the above point of view, the pure nylon 6 mixed with fine copper powder or the nylon 66 resin material 4 meets the conditions as a rainproof material with aquatic biofouling. , stain resistance and corrosion resistance,
It is the best material in terms of strength and abrasion resistance, and it is also inexpensive and free from pollution, making it the best material to prevent fouling of underwater organisms. The most important feature of the present invention is to mix 3 to 50% by weight of pure fine copper powder into nylon 6 or nylon 66 resin.

The present invention produces a nylon 6 or nylon 66 resin material mixed with pure fine copper powder.

The method for producing this resin is, for example, as follows. That is, nylon 6 resin is produced by ring-opening polymerization of caprolactam (epsilon caprolactam).

Caprolactam is synthesized by induction using phenol, acelylene, or furfural as raw materials, respectively. Caprolactam has a concentration of 200 to 300 in the presence of moisture in a nitrogen stream.
When reacted under pressure at 1 °C, nylon 6 (polycabramide) is produced by ring-opening polymerization. Then the nylon 6
Pure fine copper powder is mixed into the resin at a predetermined ratio, and the
The mixture is heated and kneaded at 250°C, extruded into a string shape with a diameter of about Bmm, and cut into lengths of about 4 to 5 pieces to produce pellets.

It is then vacuum dried at a temperature of 100 to 120°C for about 2 hours, reheated to 230 to 260°C, and extruded into an arbitrary shape using a mixed screw.

Further, the manufacturing method of nylon 66 resin is as follows, for example.

That is, it is produced by polycondensation of adipic acid and hexamethylene diamino. Adipic acid and hexamethylene diamine are derived and synthesized from basic raw materials of phenol, acetylene, furfural, and phtadiene, respectively. When adipic acid and hexamethylene diamine are heated to 220 to 270°C under pressure in a nitrogen stream, they undergo polycondensation to produce nylon 6-roba 9 (polyhexamethylene adihamide).

Next, pure copper powder was mixed into the nylon 66 resin at a predetermined ratio, and the mixture was heated and kneaded at 220 to 240°C.
Pellets are produced by extruding into strings of about n length and cutting them into lengths of about 4 to 5 mm. It is then vacuum dried at a temperature of 100 to 120°C for about 2 hours, and then dried at a temperature of 230 to 260°C.
It can be obtained by reheating to C and extrusion molding into any shape using a mixed screw.

Aquatic biofouling vJLl: As a material, there is a thermoplastic polyurethane resin layer mixed with pure copper powder, which was previously invented by the present inventor (publication of patent application, 1982-5234), but the mixing ratio of pure copper powder is Even if it is mixed in at 70% by weight, which is the limit, Kasane Kanzaki will still adhere to it. In addition, mixing a large amount of pure copper powder leads to an increase in price, and the thermoplastic polyurethane resin is also more expensive than nylon 6 or nylon 66 resin. The amount of the pure fine copper powder mixed with nylon 6 or the pure fine copper powder of the nylon 66 resin of the present invention is at most 50% by weight, and depending on the place of use and its shape, even 3% by weight can be used. It is the best anti-fouling material for underwater organisms that exhibits a fouling effect.

Next, as the material for the wire mesh coating layer for farmed cattle in (a) of the present invention, nylon 6 or nylon 66 resin with a 200 to 8
Pellets made by mixing pure copper powder of 0.00 mesh at a predetermined ratio of 1 U O were dried under vacuum at a temperature of 100 to 280'C for about 2 hours, and then heated to 230 to 280'C.
It is extruded using a kneading screw and coated onto a thermoplastic polyolefin-coated wire to a thickness of about 0.55 to 0.6M.

FIG. 1 is a longitudinal cross-sectional view of (a) wire mesh covering layer material for farmed cattle of the present invention, in which a synthetic resin 3 is provided as an insulating layer covering the surface of the metal mesh wire 2, and the surface of the synthetic resin 3 is Nylon 6 or nylon 66 resin 1, which is a mixture of highly stain-resistant and modern resin, is laminated to cover the surface.

Various metals such as iron, copper, and aluminum can be used for the mesh wire 2, but iron is optimal from a cost standpoint, considering weight, strength, possibility of recycling through chemical treatment, etc. . In addition, the wear resistance is compared to the nylon 6 resin layer.
Since the nylon 66 resin layer is slightly better, the nylon 66 resin layer is most suitable for large cattle (25 m or more in diameter). Further, as the metal powder, there are silver, nickel, copper, etc., and any of them can be used, but in consideration of cost etc., copper powder is most suitable.

The preferred embodiment shown in FIG. 1 is as follows. A layer of nylon 6 or nylon 66 resin mixed with 200 to 800 mesh of pure copper powder of 3% by weight or more is extruded onto the iron wire, coated with thermal i'rJ plastic polyolefin to a thickness of about 0.2 rin. I set up a gap. The antifouling effect is also clear from the examples shown in Tables 1 to 6.

Table 1 This is the case where 10% by weight of pure 350 mesh copper powder is mixed into nylon 6 resin, and the thickness is about 0.55 +
When using a coating material sheet with a thickness of u+1-1120 mm, the amount of corrosion due to immersion for 30 months is approximately o, oosm in thickness.
However, only a small amount of adhering shellfish naturally fell off and was washed away), and no other shellfish such as mussels or snails were observed to adhere, and the antifouling property did not deteriorate.

Table 2 This is 20% by weight of pure 35% in nylon 6 MJ fat.
This is the case when 0 menonyu of copper powder is mixed, and the thickness is flO,
55) When using a sheet for coating material of 1120 vrttt, the amount of corrosion due to immersion for 30 months is approximately 0.0 in thickness.
15 ffll+, and only a small amount (=j-attached Kanzaki naturally fell off and was washed away), no adhesion of shellfish such as mussels and Fujibbo was observed, and the antifouling property did not deteriorate at all.

Table 3 shows the content of pure 35% pure nylon 6 resin.
This is the case when 0 menonyu of copper powder is mixed, and the thickness is about 0.5
When using a 5 mm lJ20 mm coating material sheet, the amount of corrosion after 30 months of immersion is approximately 0.021 mm thick.
It is a species of shellfish such as Funtsubo and Kasanekansan.
] You can see the clothes on! /Jfr5 property did not decrease at all.

Table 4 This is 15% pure 350 polymer in nylon 66 resin.
This is the case when mesh copper powder is mixed, and the thickness is about 0.55
When using a sheet for covering material with a width of 20 mm, 30
The amount of corrosion due to the immersion was approximately 0.010 mm in thickness, and the slight amount of snails that adhered to the snails naturally fell off and was washed away), and no damage to other shellfish such as mussels and Fujibbo was observed. The antifouling property did not deteriorate at all.

Table 5 This contains 25% by weight of pure 350 in nylon 66 resin.
This is the case when Mesoyu copper powder is mixed, and the thickness is approximately 0.55 mm.
When using arll 2 Q my coating material sheet, the amount of corrosion after 30 months of immersion is approximately 0.018 in thickness.
It is i + z, and moreover, the scab that wears only a little "i" will naturally fall off (washed away), and other mussels, fujibo, etc.
No stains were observed on shellfish such as (=J), and the antifouling properties did not deteriorate at all.

Table 6 This contains 40% by weight of pure 350 in nylon 66 resin.
This is the case when Metsuyu copper powder is mixed, and the thickness is approximately 0.55 mm.
When using a coating material sheet of vrnl 1412 Q mm, the amount of corrosion after 30 months of immersion is approximately 0.0 mm.
0: d (Jyrrm), no adhesion of shellfish algae such as snails, mussels, and Fujibbo was observed, and the antifouling property did not deteriorate.

Next, as the yarn material for manufacturing the fishing net of the present invention (b) and the rope attached to the fishing net, nylon 6 or nylon 66m is used.
Pellets made by mixing 200 to 800 mesoyu of pure copper powder in a predetermined ratio to fat are heated at a temperature of 100 to 120°C for 2 hours.
After vacuum drying for about an hour, it was extruded with a heating kneading screw to 230-280°C, and the outer diameter was about 0.3-1.
Extrude and mold into 5-fin threads. This is twisted 3 to 10 times to produce one twisted yarn, that is, a raw yarn. Furthermore, this is woven into fishing nets for the eyelets of the upper ridges, which are twisted into sets of 3 to 10 wires and twisted to a thickness that corresponds to the eyelet of the fishing net.

Also, at the corners of the woven fishing net and at the joints between the nets, ropes are tied around the net, and the same material is used for the ropes. Furthermore, ropes for forming fishing nets can be manufactured to any thickness by increasing the number of twisted yarn combinations.

This effect is also evident from the examples shown in Tables 7 to 12.

Table 7 This is a case where 3% by weight of pure 800 menonyu copper powder is mixed into nylon 6 resin, and raw thread made by twisting 3 threads with an outer diameter of about 0.5 mm, When using fishing net material with an outer diameter of about 3 mm and a length of 2772 mm, twisted together in a set of 6,
The amount of corrosion after immersing for 36 months was 0.03 mm, and the slight adhesion of scabs naturally fell off and was washed away), and no other shellfish such as mussels and Fujibbo were observed, indicating stain resistance. did not decrease.

This is a case where 10% pure copper powder of 800 menonyu is mixed into nylon 6 resin, and the outer diameter is approximately Q, 5 m.
When using a fishing net fishing net with an outer diameter of about 3 mm and a length of 2 nl, which is made by twisting 3 yarns of 3 m in diameter and twisting 6 yarns together, it will be immersed for 36' T months. The amount of corrosion is approximately 0.0]
Omm, but there are only a few adhering scabs (or they naturally fall off and are washed away), other mussels, Fujibbo 4.
No stains were observed at all, and the stain resistance did not deteriorate.

Table 9 This is a case where 15% by weight of pure Iwa 800 mesh copper powder is mixed into nylon 6 resin.Three yarns with an outer diameter of about 0.5 fat are twisted, and two yarns are twisted, and then 6 When assembled and twisted, the outer diameter is approximately 3 mm and the length is 2? ) When using I for fishing nets, the amount of corrosion after 36 months of immersion is approximately 0.015ffff.
Moreover, there was no evidence of adhesion of scabs or shellfish such as mussels and barnacles, and the antifouling properties did not deteriorate at all.

This is a case where 3% by weight of pure copper powder of 800 min. is mixed into nylon 6 resin, and the outer diameter is approximately Q, 5 mI.
When using fishing net fishing net yarn with an outer diameter of about 4 amIn and a length of 2771 mm, which is made by twisting 5 yarns of n threads and further twisting them into sets of 8 yarns, the amount of corrosion after immersion for 36 months is 0.002y+
Moreover, even the slightest bit of dirt on the surface was naturally washed off and washed away), and no other shellfish such as mussels or Fujibbo were observed, and the stain resistance did not deteriorate at all. Ta.

This is nylon 66 resin with 10% by weight M
o.

This is when mesh copper powder is mixed, and the outer diameter is approximately 0.5 m.
When using 9I fishing net material with an outer diameter of 4.3 am and a length of 2 m, the amount of corrosion after immersion for 36 months was 0. .006πm
Moreover, there was a slight adhesion force so that the snails naturally fell off and were washed away), and other shellfish such as mussels and Fujibbo were not seen at all, and the antifouling property did not deteriorate at all.

a This is the case where 20% by weight of pure 800 mesh copper powder is mixed into nylon 66 resin, and the extrinsic 0.5 M
When a fishing net material with an extrinsic length of 4.3 am and a length of 2 nz is used by twisting 5 M thread-like yarns and further twisting them into sets of 8, the amount of corrosion after immersion for 36 months is 0.0018. It is a friend, and there is no sign of Kasane Kanzaki attached at all.
In addition, there was no adhesion of other shellfish algae such as mussels and Fujibbo, and the antifouling properties did not deteriorate at all.

Next, the sheet manufacturing material (c) of the present invention is nylon 6
, or a pellet made of nylon 66 resin mixed with 200 to 800 mesoyu of pure copper powder in a predetermined ratio.
After vacuum drying at a temperature of 20°C for about 2 hours,
Extrude it into a plate shape with a heated kneading screw at 0 to 280°C and use a cooling rolling roll to a thickness of about 0.1 to 2.0"% width 5
Sheets of 0.alpha. to 200.degree. are manufactured and wound into coils.

This effect is clear from the examples shown in Tables 18 to 16.

Table 18 This is a case where a sheet material with a thickness of about 0.5 cm, width of 30 CIn, and length of 2772 cm is used, in which 30% by weight of pure 200 mesh copper powder is mixed in nylon 6 resin.General sewage sewage (fresh water) , the amount of corrosion due to immersion for 30 months is approximately 0.01 in thickness.
5, and even the slightest amount of algae attached could be easily removed because no roots would grow, and the antifouling properties did not deteriorate at all.

This in Table 14 is made by mixing 50% by weight of pure Hiro 200 mesh copper powder in nylon 6 resin, with a thickness of approximately Q, 5 MWrl:I
When a 30 ctn 2 m long Sea 1 material was used, the amount of corrosion caused by immersion in general sewage water (fresh water) for 30 months was approximately 0.025 mm, and no algae formed.

Moreover, the antifouling property did not deteriorate at all.

Table 15 This is a case where 20% pure copper powder of 350 menonyu is mixed into nylon 6 resin, and the thickness is about 1.0 mm.
When 00cm N-1- is used as a resin for a JI'■tP resin ship, the amount of corrosion is only about 0.015ff in thickness over 36 months, and the corrosion rate is FD after 18 months.

This is a case where 30% by weight of pure 350 menonyu copper powder is mixed into nylon 6 resin, and the thickness is approximately 1.0 mm.
When a FR, P resin ship is used with 00 boxes of seawater wrapped in FR, P resin ships, the amount of corrosion during 36 months of use is approximately 0.04mm thick.
(1 m, force →) No fouling of shellfish algae such as snail, mussel, and fujibbo was observed, and the antifouling property did not deteriorate.

Next, the material for manufacturing pipes according to the present invention is nylon 6 or nylon 66 resin mixed with 200 to 800 meshes of pure copper powder in a predetermined ratio.
After vacuum drying at a temperature of 0°C for about 2 hours, it was dried at 23°C.
Extrusion () molding with heating kneading screw at 0~280°C, outer diameter 15~250M, thickness approx. 1.0〃ln~12m
m pipes are manufactured. This effect is clear from the examples shown in Tables 17 to 18.

Table 17 C shows the case where 15% by weight of pure 200 mesh copper powder is mixed into nylon 6 resin. When using a material with an outer diameter of 100 mm and a thickness of approximately 5 mm, the amount of corrosion after immersion for 36 months is as follows: The stain resistance was approximately 0.014 mm (0.014 mm), and even the slight amount of adhering shellfish naturally fell off and was washed away), and no adhesion of other shellfish such as mussels and Fujibbo was observed, and the antifouling property did not deteriorate.

Table 18 This is a case where 30% by weight of pure 200 mesh fine copper powder is mixed into nylon 6 resin. When using a material with an outer diameter of lOOπm and a thickness of approximately 5 mm, the amount of corrosion after 36 months of immersion is as follows: The diameter was approximately 0.025 mm, and no adhesion of shellfish algae such as mussels, fujibbo, and cylindrical algae was observed, and the antifouling property did not deteriorate.

Furthermore, the material for preventing the adhesion of aquatic organisms of the present invention is nylon 6.
Or, even if the amount of pure fine copper powder mixed with nylon 66 resin is at least 3% by weight, it has sufficient antifouling properties, and in seawater, the best antifouling effect is achieved with a mixing amount of 40% by weight. The greatest feature of the underwater biofouling prevention material of the present invention is that In contrast, in the thermoplastic polyuretano resin layer invented by the present inventor (patent application publication, 1982-52534), the amount of pure copper powder mixed is reduced by a minimum of 50% by weight and a maximum of 7% by weight. On the contrary, it shows the best stain resistance. In addition, the amount of pure copper powder mixed in nylon 6 resin in Tables 1 to 3 and the pure copper powder in nylon 66 resin in Tables 4 to 6 are The water absorption of nylon 6 resin is (1.8%), and the water absorption of nylon 66 resin is (1.8%).
1.2%). It was also found that nylon 66 resin, which has low water absorption, has slightly better abrasion resistance.

Furthermore, since the nylon band resin is self-lubricating and has a low coefficient of friction, a nylon 66 resin coating layer material is suitable.

Regarding the stain resistance, it was also found that even if the amount of pure fine copper powder mixed in Table 7 and the amount of pure fine copper powder mixed in Table 10 were the same, if the twisted yarn was made thicker, the stain resistance was further improved. Also, the physical properties of nylon 6 resin and nylon 66 resin are slightly different from each other, so it is necessary to change the resin depending on the place of use.

Further, the amount of corrosion was not due to the nylon 6 or nylon 66 resin, but was due to the elution of the copper powder mixed therein, and there was no corrosion of the nylon 6 or nylon 66 resin.

Therefore, it was also found that the strength and abrasion resistance did not decrease at all. It has also been found that even if the mixing ratio of copper powder is the same, the antifouling properties of the ship bottom sheet with flow velocity will improve when the purpose changes, for example, between a wire mesh coating layer for aquaculture raw juice and a ship bottom sheet.

The most important feature of this material as an aquatic biofouling prevention material is its high antifouling effect, and these effects are summarized in Tables 1 to 18.
Shown in the table. It is also clear from the above examples that it has an outstanding antifouling effect.

From the above points, the aquatic biofouling prevention material of the present invention is
It is inexpensive and can be used as a material to prevent the adhesion of aquatic organisms in all kinds of water-contact areas. Materials used for walls, floors, and structures such as concrete docks for hauling fishing boats at fishing ports, which can be hardened and flexible depending on needs, such as iron and resin. , FBL can be easily adhered to various internal and external surfaces made of concrete by a coating method, and it can also be coated with up to 111M, which meets the various conditions as a material for preventing the adhesion of aquatic organisms.
How many aquatic creatures are there in the 10th season?

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view shown in Tables 1 to 6 of an embodiment of the wire mesh coating layer for aquaculture juice of the present invention (1). 1... Nylon 6 or nylon 66 resin layer, 2...
Net wire, 3...Neppo iJJ plastic synthetic resin layer. Figure 1

Claims (1)

[Claims] Pure fine copper powder is mixed with nylon 6 or nylon 66 resin material, and it can be made into any shape, i.e. (a) wire mesh covering layer material for farmed cattle, (b) raw material for manufacturing fishing nets and ropes attached to fishing nets. A material for preventing the adhesion of aquatic organisms, characterized by being extruded into threads, (c)c], ni) pipes.