JPS6326429Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to pollution-blocking sheets, oil fences, and other fiber sheets for installation underwater. Conventionally, when installing the above-mentioned sheet in water, oysters, barnacles, etc. attached to it increased the weight of the sheet, making it difficult to keep it floating for a long time, and the attached oysters etc. could cause the sheet to touch or bend. This causes inconveniences such as damage to the sheet and significantly worsening of handling properties. For this reason, it is desired that these sheets do not attract aquatic harmful organisms. Since metallic copper is known to have the effect of preventing the attachment of aquatic pests, the inventors of the present invention attempted to use copper wire or copper-plated fibers as part of the sheet. It has poor processability (twisting, warping, weaving, etc.), and although it is initially effective, its effectiveness decreases when the copper corrodes, and furthermore, copper wires, etc. may fall off from the sheet due to corrosion. It was found that the effect was not permanent. The present invention eliminates these drawbacks, and uses copper-containing fibers that have adsorbed minute amorphous metallic copper within them to form stripes or lattices at intervals of 5 cm or less on a fiber sheet made of ordinary fibers. It is characterized by being arranged in a shape. The copper-containing fiber used in the present invention is obtained by adsorbing copper ions to the fiber and then reducing and depositing metallic copper within the fiber using a reducing agent.
Acrylic fibers are particularly preferred as base fibers because they have an extremely high affinity for copper ions.For example, as copper-containing acrylic fibers,
It is disclosed as a conductive fiber in Japanese Patent No. 51873. In such fibers, metallic copper is adsorbed in the fiber in an amorphous state, and copper ions are sequentially released into water before corrosion, which acts against harmful organisms. Therefore, the effect of preventing the attachment of pests lasts for an extremely long time, and the fibers themselves are hardly damaged. In the present invention, the means for arranging the copper-containing fibers in a fiber sheet includes spinning the fibers alone or with other fibers, twisting them, hand-aligning them, etc., and forming them as part of the warp and/or weft of the fiber sheet. It is possible to adopt a method in which the fibers are woven, or the fibers are stitched into a fiber sheet at appropriate intervals by twisting the fibers alone or with other fibers. Here, when disposing the copper-containing fibers, it is effective to set the spacing to 5 cm or less, and in particular, if the spacing is 3 cm or less, the adhesion of barnacles and the like will be significantly reduced.

[Table] As described above, the sheet of the present invention prevents the attachment of aquatic harmful organisms over a long period of time, so it can be installed stably for a long period of time as a pollution-blocking sheet, oil fence, etc. FIG. 1 shows an example in which the present invention is used as an underwater pollution blocking sheet, in which a float 3 and a sink 4 are integrated with the sheet of the present invention in which copper-containing fibers 2 are woven in stripes on a fiber sheet 1. It is installed vertically below the water surface. This pollution-blocking sheet has less adhesion of barnacles, oysters, etc., and can be kept floating stably for a long period of time. The present invention can also be applied to ropes used underwater, fishing nets, etc. Specifically, by twisting and blending copper-containing fibers as part of the constituent threads of ropes and fishing nets. used.

[Brief explanation of the drawing]

FIG. 1 shows an application example of the sheet of the present invention, in which 1 is a fiber sheet main body, 2 is a woven copper-containing fiber thread, 3 is a float, and 4 is a sinker.

Claims (1)

[Claims for Utility Model Registration] (1) Copper-containing fibers in which minute metallic copper is adsorbed are arranged in a striped or lattice pattern at intervals of 5 cm or less on a fiber sheet made of ordinary fibers. A sheet free from adhesion of underwater harmful organisms. (2) In the preceding paragraph, the copper-containing fiber is a copper-containing fiber obtained by adsorbing copper ions to the fiber using acrylic fiber as its base, and then reducing and precipitating fine metallic copper using a reducing agent. A sheet that does not attract underwater harmful organisms.