JPH06235142A - Fabric for preventing attaching aquatic organism from attaching - Google Patents

Abstract

PURPOSE:To obtain a fabric for preventing attaching aquatic organisms from attaching capable of providing higher preventing effects on the attachment with excellent durability than those of coating with a conventional epoxy-based or urethane-based coating by installing thereof in the ship bottom, etc. CONSTITUTION:Fine fluff composed of ultra-fine fiber of <=5 denier single fiber size is formed on the surface of fabric. A hydrophilic resin is applied to the surface opposite to the surface on which the fine fluff is formed to impart waterproofness thereto.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cloth for preventing adhesion of aquatic organisms having a tendency to adhere, such as barnacles, irrigation, and haze, which are widely distributed and inhabit the ocean coast and inner bays.

[Prior art]

[0002] As an adherent aquatic organism having adhesion habit,
A large number of living creatures such as Fujitsubo, Irigai, and Hoya are known.For example, Fujitsubo is widely distributed around the world, and it is the most common species of this species on the coast of Japan. Areboya is widely distributed along the coast of Japan and is also found in the Sea of Okhotsk and the coast of Ireland. Adhesive aquatic organisms with this kind of adhesion habit adhere to the bottom of boats, shellfish rafts, buoys, etc. to induce rust and promote damage, and reduce functions such as slowing the speed of ships. Doing harm. In addition, recently, the damage caused by adherent aquatic organisms having adhesion habits such as adhesion to cooling water circulation equipment in a nuclear power plant that uses seawater as cooling water is extremely large.

Since there is no drastic measure to prevent the adhesion of these adherent aquatic organisms, for example, when a barnacle or the like adheres to the bottom of a ship, its shape is conical and its shell component is calcareous. Therefore, it is difficult to remove it easily, and the worker is forced to perform a troublesome long-time work.

Conventionally, as a method for preventing the adhered aquatic organisms from adhering, a treatment such as directly coating an epoxy-based paint, a urethane-based paint or the like directly on the adhered portion such as a ship bottom has been carried out. , The adhesion prevention effect is low,
In addition to being poor in durability, there is a problem in the environment for painting work, and further, there are problems such as the removal of attached organisms about once a year and the high cost of repainting, which is not preferable.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above problems, and an object of the present invention is to provide a cloth for preventing adherence of adherent aquatic organisms to be attached to an adhered portion such as a ship bottom. It is what

[0006]

The cloth for preventing adherence of adherent aquatic organisms according to the present invention achieves the above object, and comprises a fine fiber having a single yarn fineness of 1.5 denier or less on the surface of the cloth. It is characterized by forming fine fluff. Further, it is desirable to apply a hydrophobic resin to the surface on the opposite side of the cloth to impart waterproofness.

[0007] The adherent aquatic organisms referred to in the present invention are intended for adherent aquatic organisms having a distributional habit of being distributed and inhabiting a large amount on the ocean coast and inner bays. The target is creatures such as Ebo, Yureibo and Zarabo.

As the ultrafine fibers used in the present invention, natural fibers and synthetic fibers such as polyester, polyamide and polyacrylonitrile can be used. In particular, the use of polyester fiber is preferable because it has good functionality such as raising properties, wrinkle resistance, durability, and dimensional stability.

The fluff of ultrafine fibers in the present invention is a fiber having a single yarn fineness of 1.5 denier or less, and particularly preferably a single yarn fineness of 0.01 to 1.5 denier. As a method for producing ultrafine fibers, for example, a method in which a polymer spinning solution is discharged from a spinneret and is made into an ultrafine state during spinning,
A method of flow-drawing a spun yarn to make it ultrafine,
Examples thereof include a method of dissolving and removing the sea component of the sea-island type composite fiber and a method of splitting the joint type composite fiber.

The fluff of the ultrafine fibers in the present invention is flocked,
It is formed by raising or the like, but it is particularly preferable to form by raising. In this case, the ultrafine fibers in the above range are woven or knitted to form a cloth, and by raising the surface of the cloth, it is possible to easily obtain a cloth having fluff in which innumerable fine fibers are arranged.

On the other hand, as a method for imparting waterproofness by applying a hydrophobic resin to the surface of the cloth opposite to the surface on which the fluffs are formed, generally used natural rubber or synthetic resin, and further poly Acrylic resins and polyurethane resins are used, and various coating methods such as the use of printing rolls engraved in multi-points, intermittently or linearly can be used as a method for applying these hydrophobic resins. In the fabric of the invention, it is necessary to take care so that the fluff forming surface is not deformed by pressure and heat, and it is necessary to take care so that the resin does not pass through the fluff forming surface.

The cloth obtained as described above has a great effect as a cloth for preventing adhesion of adherent aquatic organisms, and when the cloth is used in seawater, it has a hydrophobic property applied to the back surface of the cloth. The resin improves the adhesiveness to the adhered portion, and also has the effect of reducing the peel strength due to the influence of seawater or the like flooded from the fabric surface and preventing rusting on the adhered portion.

[0013]

The reason why it is possible to prevent adherent aquatic organisms from being adhered by using the cloth in which fine fluffs are formed of ultrafine fibers having a fine single fiber fineness of 1.5 denier or less in the present invention Although it is not always clear, most of these adhering aquatic organisms have extremely minute projections or folds, and they adhere at these sites.The mechanism of attachment by the fine fluff on the fabric surface itself. Is presumed to be inhibited.

Thus, for example, by attaching the cloth of the present invention to the adhered portion such as the ship bottom, it is possible to prevent or protect the deterioration of the ship bottom due to the adhesion of adherent aquatic organisms, and is represented by a barnacle. There is no need for troublesome removal work of adherent aquatic organisms. In addition, it is possible to rationalize the painting work that has mainly been aimed at rust prevention, improve the working environment, and can also be applied to the cooling water system circulating water pipe of a nuclear power plant, and its industrial application field is extremely large.

When a hydrophobic resin is applied to the surface of the cloth on the opposite side where the fluff is formed to provide waterproofness, the adhesiveness with the adhered portion is improved and water is flooded from the surface of the cloth. It is possible to obtain the effect of preventing the peeling strength from being lowered due to the influence of seawater and the rusting of the adhered portion.

[0016]

EXAMPLES The present invention will be described in detail below with reference to examples.

Example 1 110 denier / 366 filaments for warp (extra fine fiber having a single yarn fineness of about 0.3 denier) and 7 wefts
Using a polyester multifilament consisting of 5 denier / 48 filaments, satin weave is woven at a density (warp 200 / inch, weft 120 / inch), and the resulting satin weave is napped with a sandpaper-raising machine. did. On the surface of the obtained cloth, the ultrafine fibers of the warp were cut to form fine ultrafine naps.

This cloth was cut into a size of 50 cm in length and 50 cm in width to form each sample, which was immersed in a water tank in which seawater repeatedly circulates and stays, and after 6 months and 12 months, it is divided into two times. The sample was taken out, and the state of adhesion of adherent aquatic organisms in each sample was visually evaluated. The results are shown in Table 1. The evaluation method is as follows. ○ Small amount of adhesion △ Large amount of adhesion × Large amount of adhesion

[0019]

[Table 1]

As is clear from Table 1, the fabric of Example 1 has a remarkable effect of preventing adhesion as compared with Comparative Examples 1 to 3.

As Comparative Example 1, an iron piece coated with an epoxy paint is used, and as Comparative Example 2, a cloth using the same ultrafine fibers as in this Example, which is not napped, is used. Then, a polyethylene film was used as Comparative Example 3.

The epoxy coating of Comparative Example 1 showed almost no anti-adhesion effect, and the fluff of Comparative Example 2 had a low anti-adhesion effect, and Comparative Example 3
In the case of the film (1), its anti-adhesion effect is extremely low.

Example 2 75 denier / 48 filament warp and 2 weft
Density of satin fabric using polyester multifilament consisting of 10 denier / 1152 filaments (ultrafine fibers having a fineness of about 0.1 denier)
2 pieces / inch, weft 100 pieces / inch), and the resulting satin fabric was raised with a needle cloth raising machine. On one side of the obtained cloth, the ultrafine fibers of the weft were cut, and ultrafine naps having fine irregularities were formed. Synthetic rubber was uniformly applied to the opposite surface of this cloth. This cloth is 50 cm in length x 5 in width
Cut into pieces of 0 cm size to make each sample, attach them to iron pieces with an adhesive, immerse in seawater that repeatedly circulates and stays in seawater, and take it out twice in 6 months and 12 months. The state of adhesion of adherent aquatic organisms and the presence or absence of detachment in each sample were visually evaluated. The results are shown in Table 2.
Shown in. The evaluation method is the same as in Example 1.

[0024]

[Table 2]

As is clear from Table 2, the fabric of Example 2 was excellent in that a remarkable effect of preventing adhesion was recognized, and peeling between the fabric and the adhered portion was not recognized. As a comparative test, as Comparative Example 4, a cloth which is made of the same ultrafine fibers as that of the present example and which is not raised is used, and as Comparative Example 5, a polyethylene film is used.

Comparative Example 4 shows that when the surface of the cloth does not have fine fluff, the anti-adhesion effect is low and the cloth peels off, and Comparative Example 5 shows that when the film has a smooth surface, No peeling from the adhered part was observed, and there are some excellent surfaces, but the anti-adhesion effect is extremely low.

[0027]

As is apparent from the above description, according to the present invention, by attaching an adhesive or the like to a member to which adherent aquatic organisms adhere, adhesion of adherent aquatic organisms is prevented in advance. This makes it possible to prevent and protect the bottom of the ship from deterioration and eliminates the need for troublesome removal work.

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Claims (2)

[Claims] 1. A fabric for preventing adhesion of adherent aquatic organisms, characterized in that fine fluff made of ultrafine fibers having a single yarn fineness of 1.5 denier or less is formed on the surface of the fabric. 2. The surface of the fabric is formed with fine fluff made of ultrafine fibers having a single yarn fineness of 1.5 denier or less, and a hydrophobic resin is applied to the opposite surface to impart waterproofness. A cloth for preventing adherence of aquatic organisms, characterized by: