JPH11262338A - Nori net - Google Patents

Abstract

(57) [Problem] To provide excellent adhesion and growth of nori sprout at the outermost periphery or outermost periphery of the netting, the next outer peripheral portion and the body netting portion, and have high flex fatigue and netting strength. In particular, the present invention provides a seaweed net having excellent durability when used in a place where harsh conditions are severe, and also having excellent drying properties of a net and prevention of dirt adhesion. SOLUTION: The laver net of the present invention is a laver net finished so that the nodule form becomes a net of frogs or nodules, and has a bending fatigue property of 100 times or more at the outermost circumference or at the outermost circumference and the next outer circumference portion. , Knot strength of 4 g / d or more, single yarn fineness of 50 to 100
A twisted or mixed twisted yarn containing at least 50% by weight of 0 denier raw yarn is used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a net used for cultivating seaweed and mozuku, and more particularly to a floating seaweed net used in a place where harsh conditions are severe.

[0002]

2. Description of the Related Art Polyvinyl alcohol fibers have been widely used as conventional laver net fibers. That is,
Polyvinyl alcohol fiber has excellent adhesion to seaweeds such as laver, so it does not require much netting strength.Use in a bay with gentle wave conditions such as the Ariake Sea requires polyvinyl alcohol fiber. Stapled and twisted polyvinyl alcohol fiber 100%
The mesh used is mainly used.

[0003] However, in the floating type in which the wave conditions are severe and a large force is applied to the netting and the rope, the strength is insufficient with only polyvinyl alcohol fiber. Therefore, polyamide fiber or polyester fiber having higher strength than polyvinyl alcohol fiber is used. A combustible yarn obtained by twisting and twisting a polyvinyl alcohol fiber is used. In this case, in addition to the strength, from the necessity of the drying property and the stain prevention property of the net,
It is necessary to use an original yarn having a large single-filament fineness, and from this point, a monofilament of polyvinyl alcohol fiber (vinylon monofilament) is used.

[0004] However, if all the fibers used for the net yarn are monofilaments having a large single-filament fineness, the antifouling property is further improved, but the drying property is excessively advanced, so that the seaweed buds are burnt and the sprout occurs. There was a problem. Therefore, at present, polyvinyl alcohol fibers are used as monofilaments, and other twisted fibers are used as multifilament yarns having a single yarn fineness of about 6 to 40 denier.

[0005] However, vinylon monofilament has a high tensile strength but a low knot strength, and is particularly poor in bending fatigue. Therefore, in the conventional nori net, the outermost or outermost part of the net and the next outer part of the mesh,
The strength of the yarn is increased by using a larger amount of yarn than other body meshes and increasing the diameter of the mesh yarn. Nevertheless, since vinylon monofilament is still brittle in material, it is 1-2 stages (3 ~ (6 months), there was a problem that the single yarn was cut.

[0006] Further, the durability of laver nets is improved by increasing the twisting rate of polyamide fibers or polyester fibers having excellent flex fatigue properties into the net yarn and reducing the amount of vinylon monofilament used. However, there has been a problem that when the twist ratio of the polyamide fiber or the polyester fiber is increased, the adhesion of the nori sprout is reduced, and the yield of the nori is greatly reduced.

[0007]

SUMMARY OF THE INVENTION The present invention has been achieved as a result of studying to solve the problems in the prior art described above.

[0008] Accordingly, an object of the present invention is to provide excellent adhesion and growth of laver sprouts on the outermost or outermost periphery of the netting, the next outer peripheral portion and the body net portion, as well as high flex fatigue and high netting strength. Another object of the present invention is to provide a seaweed net having excellent durability, particularly when used in a place where the wave conditions are severe, and excellent in the drying property of the net and the prevention of stain adhesion.

[0009]

In order to achieve the above-mentioned object, a laver net according to the present invention is a laver net finished so that the nodule forms a frog or nodule netting, On the outer periphery and the next outer periphery, a mesh yarn consisting of a twisted yarn or a mixed twist yarn containing at least 50% by weight of a raw yarn having a bending fatigue property of 100 times or more, a knot strength of 4 g / d or more, and a single yarn fineness of 50 to 1000 deniers. It is characterized by using.

[0010] In the laver net of the present invention, the contact angle of the raw yarn with water measured by the Wilhelmy method is 70 degrees or less, and the raw yarn contains polyetheresteramide of 0.2.
-30% by weight of a synthetic resin, particularly polyamide, that at least 5 concave portions having a width of 30μ or less are formed in the fiber axis direction per fiber length of 1 cm on the surface of the raw yarn. A twist yarn consisting of only yarn, and at least one fiber 50 selected from polyamide fibers, polyester fibers, polypropylene fibers and polyethylene fibers having a net yarn of 50% by weight or more and a single yarn fineness of 50 denier or less. It is a preferable condition that the yarn is a mixed twist yarn having a weight percent or less, and by applying these conditions, it is possible to expect to obtain a further excellent effect.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The laver net of the present invention will be described below in detail.

First, the structure of the laver net of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic explanatory view showing a state in which the laver net of the present invention is attached to an ear thread rope.

In the present invention, the netting having a knot type of frog or knot means a netting knitted by using a normal frog or knitting machine, which is a twisted yarn twisted by a ring twisting machine or the like. Since it is obtained by knitting by using it as a raw yarn, it has features such as high productivity of the netting and no deviation of the knot.

As shown in FIG. 1, the frog or knot mesh is fixed to the outer thread rope c by knotting or sewing, and held horizontally on the water surface, as shown in FIG. Used as a laver net. In addition, ear thread rope c
Is anchored to the sea floor and floats through it so that it is always in tension under the ebb and flow of the tide.

Therefore, the ear thread rope c is not much affected by the waves, but the laver net fixed to the ear thread rope c is swayed up and down under the influence of the waves. For this,
The outermost mesh yarn a fixed to the ear thread rope c is most susceptible to bending fatigue, and the next outer mesh yarn b is most susceptible to bending fatigue. It will be cut off in season use. Although the bending fatigue can be improved to some extent by increasing the single-filament fineness of the fiber, the effect of the fiber material is so great that increasing the single-filament fineness of vinylon monofilament has little effect.

Therefore, the seaweed net of the present invention has a bending fatigue property of 10 or less at the outermost circumference or the outermost circumference and the next outer circumference of the frog or knot network.
0 times or more, knot strength of 4 g / d or more, single yarn fineness of 50 to
The use of a twisted or mixed-twisted yarn containing at least 50% by weight of 1000 denier raw yarn greatly improves the durability of the mesh.

Here, the bending fatigue property is particularly related to the Young's modulus of the fiber. The fiber having a high Young's modulus is stiff, and the bending fatigue property tends to be inferior as the Young's modulus increases. Therefore, as the raw yarn material of the present invention, a polyamide fiber having a low Young's modulus or the like is preferable.

The bending fatigue property of the raw yarn referred to in the present invention is measured using a MIT bending fatigue tester manufactured by Toyo Seiki Co., Ltd. according to JIS P-81.
This is a value measured according to No. 15. That is, 1 g of fiber /
With a load of 1 g per d applied, speed: 180 times /
Minute, deflection angle: about 270 degrees (135 degrees each on the left and right), radius of curvature of left and right bending surfaces of the bending piece sandwiching the fiber: 0.38 ± 0.03 mm each, the number of times of bending until the fiber is cut Is measured and expressed.

This bending fatigue test method is similar to a practical state in which a mesh is used. In the case of vinylon monofilament, cutting is performed about 5 to 10 times.
1-2 seasons (approximately 3 to 6 months) for actual net use
In order to improve durability from cutting with
It is preferable to withstand 100 or more bendings in consideration of safety.

The flex fatigue property used in the present invention is 10%.
The fineness of the single yarn of zero or more times is preferably in the range of 50 to 1000 denier, particularly 200 to 550 denier. In the case of a yarn having a single-fiber fineness of less than 50 denier, not only dirt contained in seawater tends to adhere during use, but the drying property of the net yarn becomes poor, and the single-fiber fineness becomes 1000.
If the yarn exceeds denier, the fiber becomes hard and the knot becomes less likely to be tightened during knitting.

[0022] In addition to the above-mentioned bending fatigue, when the knot strength of the yarn is low, the netting is broken. In other words, if the bending fatigue is low, the yarn is partially cut, and as the cutting progresses, the yarn falls off the mesh yarn, and the strength of the entire mesh yarn gradually decreases, leading to breakage. If the knot strength is low, for example, when the mesh is hooked, a cause of the immediate breakage of the mesh is caused. In a frog or knot network, knot strength is an important characteristic rather than tensile strength of the original yarn.

The knot strength of the yarn is determined by the properties of the material polymer,
The knot strength of the yarn for providing a property that the netting is hard to be broken needs to be 4 g / d or more, although it depends on the yarn production conditions and the single yarn fineness. The knot strength of ordinary vinylon monofilament is 1.5 to 2
g / d, and 4 to 5 polyamide monofilament yarns.
Since it is g / d, the use of polyamide fiber is excellent also from the point of knot strength.

The raw yarn used in the present invention satisfies the above-mentioned bending fatigue property, single-filament fineness and knot strength, and further has a contact angle with water measured by the Wilhelmy method of 70 ° or less, particularly 60 ° or less. Is preferred. This is because the yarn having a low contact angle has characteristics of high hygroscopicity and excellent adhesion of nori spores.

The contact angle with water as referred to in the present invention means the surface tension (σ) when a single yarn is put into or pulled out of a liquid.
The force acting on the single yarn is (F), the fiber diameter is (d),
When the contact angle is (θ), this is a value derived from the equation F = πdσcosθ. That is, it is a value derived by the Wilhelmy method of calculating the contact angle (θ) by calculating the resistance (F) when a single yarn is put into or pulled out of a liquid with a microbalance.

The contact angle of the Wilhelmy method includes an advancing contact angle obtained from the surface tension when a sample (single yarn) is put in a liquid and a receding contact angle obtained from the surface tension when the sample (single yarn) is pulled out of the liquid. Are indicated by advancing contact angles. The contact angle can also be measured by attaching a water drop (ion-exchanged water) to the surface of the plate with a microcylinder and reading the angle with a goniometer of Elma Optical Co., Ltd. Although the degree corresponds to 65 degrees in the water drop method, it is difficult to measure by the water drop method particularly when the diameter of a single yarn is small, so it is preferable to use the Wilhelmy method.

When the contact angle of the yarn is larger than 70 degrees,
Even if the surface of the yarn has irregularities, it is not preferable because the attached seaweed spores and the like tend to fall off.

There are various methods for obtaining a yarn having a contact angle with water of 70 degrees or less. For example, as described in Japanese Patent Publication No. 7-8188, a method of post-processing with a substance capable of improving the hygroscopicity and reducing the contact angle, for example, Japanese Patent Publication No. 59-53007 and Japanese Patent Application Laid-Open No. As described in 193633, a fiber obtained by a method in which a substance having a high hygroscopicity is kneaded into a polymer and spun together may be used as the material. However, when kneading a highly hygroscopic substance into the polymer,
The highly hygroscopic substance to be kneaded is not colored,
It is also necessary that the fibers after kneading are not colored. If the fibers are colored, it is difficult to see the spores when judging the adhesion state during the operation of attaching the spores such as laver and it is difficult to attach an appropriate number of the spores.

Further, when kneading a highly hygroscopic substance, a substance which exhibits an effect with a small amount of kneading rate should be selected as a substance having a high hygroscopicity to be kneaded, in order to make it difficult to lower the strength of the raw yarn. It is desirable to do.

As a material which greatly reduces the contact angle with water at a small kneading rate and is hardly colored during and after spinning, the use of polyetheresteramide is particularly preferred.

The polyetheresteramide is a block copolymer having an ether bond, an ester bond and an amino bond in the same molecular chain, and is more particularly selected from lactams, aminocarboxylic acids and salts of diamines and dicarboxylic acids. A block copolymer obtained by subjecting one or more polyamide-forming components (A) and a polyetherester-forming component (B) composed of dicarboxylic acid and poly (alkylene oxide) glycol to a polycondensation reaction. is there.

The kneading ratio of this polyetheresteramide to the raw yarn forming polymer is 0.2 to 30% by weight,
More preferably, it is 1 to 15% by weight.

As the base polymer of the yarn into which a highly hygroscopic material such as polyetheresteramide is kneaded, a polyamide having high strength after spinning is preferable. Particularly, nylon 6, nylon 66, or a copolymer of nylon 6 and nylon 66 is preferred. A copolymer of nylon 6 and nylon 66 having a copolymerization ratio of nylon 6 of 3 to 10% by weight is particularly preferred in that the yarn has a high strength and also has flexibility. Use is most preferred.

The raw yarn of the present invention can be obtained by a known method comprising, for example, using a master batch in which polyetheresteramide is added to polyamide and kneading it together with polyamide using an extruder spinning machine. Other methods may be used.

The raw yarn used in the present invention preferably satisfies the conditions of the above-mentioned flex fatigue properties, single yarn fineness, knot strength and contact angle with water, and further satisfies the condition that the surface has irregularities. Thereby, the adhesion of the laver spores can be further enhanced.

That is, since the nori spores have a size of about 5 to 15 .mu., A large number of recesses having a size of 30 .mu. Or less, more preferably about 5 to 10 .mu. It is possible to prevent the nori spores attached to the spores from falling off and to enhance the viability of the nori spores.

The shape of the concave portion formed on the surface of the raw yarn may be uniform in width, or may be different in the depth direction or the length direction. The concave portion may be long continuously in the fiber axis direction, or may be short. However, the widest part is 3
It is desirable that the number of the concave portions, which is important to be 0 μm or less, is formed at least 5 per 1 cm of the fiber length in the fiber axis direction. The smaller the interval between the concave portions adjacent to each other, the more preferable effect can be obtained. The number of the concave portions can be confirmed with an electron microscope. Further, the depth of the recess is not particularly specified.

As a method for forming a concave portion on the surface of the yarn, a material which can be easily eluted by immersion in water or liquid is kneaded into the yarn, and after spinning, immersed in water or a specific liquid. For example, a method in which ethylene bisphthalamide, which is generally used as a crystal inhibitor for improving transparency in the case of a polyamide monofilament, is not added, is not particularly limited.

It is important that these raw yarns occupy 50% by weight or more of the net yarn used for the outermost periphery or the outermost periphery and the next outer periphery of the frog or knotted net. That is, in the conventional laver net, the twist ratio of vinylon monofilament having low bending fatigue is suppressed to about 50% by weight or less, and polyamide multifilament having high bending fatigue is used by 50% by weight or more. And the yield of nori in the outer periphery was small. However, in the laver net of the present invention, since the net yarn containing the above-mentioned original yarn at 50% by weight or more is used for the outermost periphery or the outermost periphery and the next outer periphery of the netting, flex fatigue and nori sprouting are required. Because of high adhesiveness and high knot strength, it does not cause thread breakage or breakage of the net, and the yield of laver at the outermost circumference or the outermost and next outer circumference of the net is the other part of the net, that is, the body net Same as the part.

The above-mentioned yarn may be constituted by a twisted yarn consisting of this yarn alone, but the yarn is twisted with 50% by weight or less of a high-strength yarn having a single yarn fineness of 50 denier or less. It is also possible to form a mesh yarn with a burning yarn, and as the high-yarn yarn having a single-fiber fineness of 50 denier or less constituting a combustible yarn, at least one kind selected from polyamide fibers, polyester fibers, polypropylene fibers and polyethylene fibers. The most preferable is a multifilament having a high flexibility and high strength.

As the body net portion in the laver net of the present invention, vinylon monofilament and / or vinylon multifilament having excellent adhesion of laver buds are used. In order to control the proper adhesion of the yarn, at least one selected from the group consisting of the above-mentioned yarn, polyamide fiber, polyester fiber, polypropylene fiber and polyethylene fiber is twisted with respect to the mesh yarn forming the body mesh portion. You may use it.

Thus, the outermost circumference or the outermost circumference and the next outer circumference have a bending fatigue of 100 times or more and a knot strength of 4 g / d.
As described above, the seaweed of the present invention is finished using a twisted or mixed twisted yarn containing at least 50% by weight of a raw yarn having a single yarn fineness of 50 to 1000 denier, so that the knotting form is a frog or knotted mesh. The net has excellent adhesion and growth of nori sprout on the outermost periphery or outermost periphery and the next outer peripheral part and the body net part of the netting, and has high bending fatigue and high netting strength, and has excellent durability. It has excellent properties that the drying property of the netting and the anti-fouling property are good, and by utilizing these properties, it is preferable as a net for cultivation of seaweed and mozuku, which are to be installed particularly in places where the wave conditions are severe. Can be used.

[0043]

The present invention will be described in more detail with reference to the following examples. In addition, each evaluation characteristic in this example was measured by the following method.

[Net yarn fineness] It was determined from the weight of a net yarn having a length of 1 m.

[Diameter of mesh thread] Measured under the condition of initial load of 100 g / cm ² using a compression elasticity tester manufactured by Nakayama Electric Industry Co., Ltd. [Bending fatigue property] Using an MIT bending fatigue tester manufactured by Toyo Seiki And JIS P-8115. That is, at a load of 1 g per 1 g / d of fiber, the speed: 180 times / min, the deflection angle: about 270 degrees (one for each side)
35 °), the curvature radius of the left and right bending surfaces of the bending piece sandwiching the fiber: 0.38 ± 0.03 mm, and the number of bendings until the fiber was cut was measured.

[Strength of Net Yarn] A test was conducted according to JIS-L1034 in a state in which a frog or a knot was included in the center of the samble.

[Adhesiveness of nori sprout] Seed shells were placed in artificial seawater at 17 ° C, and the sample was immersed for a certain period of time in a state where spores were released. Are counted and expressed.

[Dirt of net yarn] JIS in 1 liter of seawater
Add 50 g of 11 kinds of dust specified as test dust of Z-8901, stir well, immerse the net yarn in this liquid for 1 minute, air-dry, and use an SM color computer manufactured by Suga Test Instruments Co., Ltd. This is a measurement of lightness (L value), and the larger the numerical value, the higher the lightness and the less dirty.

[Moisture content after drying] The nets cut to a length of 1 m were immersed in water for 24 hours, and a sample was taken out in an atmosphere where the temperature and humidity were adjusted to a standard state and suspended vertically.
It was indicated by the water content at the elapse of minutes. The water content is shown by the following equation. Water content = weight after wet-dry weight / dry weight × 100 (%): The higher the water content, the longer the drying time.

Example 1 A nylon 6/66 copolymer having a copolymerization weight ratio of nylon 6 and nylon 66 of 95: 5 was prepared from a polymer material containing 4% by weight of polyetheresteramide and water With a contact angle of 67 degrees, single fiber fineness of 440 denier, knot strength of 5.1 g / d, number of bending fatigue of 2274 times, and 100 concaves of 30 μ or less on the fiber surface per 1 cm of fiber length in the fiber axis direction The above 9 monofilament yarns and 6 nylon 6 multifilament yarns of 450 denier and 15 filaments (single yarn fineness of 30 denier) were subjected to a lower twist coefficient K by a ring twisting machine.
After priming at 1700, plying was performed at a plying ratio of 0.5, which is the number of plying, to obtain a three-ply twisted mesh yarn. Using a frog or knitting machine made by Toyo Kogyo Co., Ltd., this net yarn is arranged on the outermost and next outer peripheral portions. As the body net portion, a nylon 6 multifilament yarn of 450 filaments, 15 filaments, and a single yarn Using a vinylon monofilament yarn with a fineness of 500 denier, knitting was performed at a mesh size of 30 cm, set in fixed water at 60 ° C. for 3 minutes, and air-dried, thereby producing a knotted frog or knotted net. .

The twist ratio of the monofilament yarn having a single-fiber fineness of 440 deniers in the outermost and next outer peripheral portions is 6
It was 0.0% by weight. Table 1 shows the results of evaluating various performances of this frog or knot network.

Example 2 Ten monofilament yarns having a single-fiber fineness of 440 denier and five nylon 6 multifilament yarns having a single-fiber fineness of 30 denier used in Example 1 were used in the same manner as in Example 1. In the first example, a 450-denier, 15-filament nylon 6 multi-filament yarn and a single-filament 500 denier vinylon monofilament yarn were used as a body net portion. As with knitting, sets,
By air-drying, a knotted form of a frog or knot was produced.

The twist ratio of the monofilament yarn having a single-fiber fineness of 440 denier in the outermost and next outer peripheral portions is 6
It was 6.2% by weight. Table 1 shows the results of evaluating various performances of this frog or knot network.

[Example 3] Eleven monofilament yarns having a single-fiber fineness of 440 denier and four nylon 6 multifilament yarns having a single-fiber fineness of 30 denier used in Example 1 were used in the same manner as in Example 1. In the first example, a 450-denier, 15-filament nylon 6 multi-filament yarn and a single-filament 500 denier vinylon monofilament yarn were used as a body net portion. As with knitting, sets,
By air-drying, a knotted form of a frog or knot was produced.

The twist ratio of the monofilament raw yarn having a single-fiber fineness of 440 denier in the outermost and next outer peripheral portions is 7
It was 2.9% by weight. Table 1 shows the results of evaluating various performances of this frog or knot network.

Example 4 Eight monofilament yarns having a single fiber fineness of 440 denier used in Example 1
A three-filament nylon 6 multifilament yarn having a single yarn fineness of 30 deniers and a mesh yarn twisted in the same manner as in Example 1 are arranged on the outermost and next outer peripheral portions. Using a multifilament yarn and a vinylon monofilament yarn having a single-filament fineness of 500 denier, a knitting net, a set, and air-drying were performed in the same manner as in Example 1 to produce a knotted frog or knotted net.

The twist ratio of the monofilament yarn having a single-fiber fineness of 440 denier in the outermost and next outer peripheral portions is 7
2.3% by weight. Table 1 shows the results of evaluating various performances of this frog or knot network.

Comparative Example 1 Single yarn fineness was 500 denier,
A vinylon monofilament having a knot strength of 1.7 g / d and a bending fatigue frequency of 8 was used as a raw yarn. Six vinylon monofilaments and the nylon 6 multifilament yarn 7 having a single denier fineness of 30 denier used in Example 1 were used. A book is twisted in the same manner as in Example 1 and a net yarn is arranged on the outermost and next outer peripheral portions.
Using a nylon 6 multifilament yarn of a filament and a vinylon monofilament yarn having a single yarn fineness of 500 denier, a knitting net, a set, and air-drying were performed in the same manner as in Example 1 to produce a net with a knot form of a frog or a knot. .

The twist ratio of the vinylon monofilament having a single yarn fineness of 500 denier in the outermost and next outer peripheral portions was 48.8% by weight. Table 1 shows the results of evaluating various performances of this frog or knot network.

Comparative Example 2 Eight vinylon monofilaments each having a fineness of 500 denier used in Comparative Example 1
Three nylon 6 multifilament yarns having a single fiber fineness of 30 denier used in Example 1 were twisted in the same manner as in Example 1 to form a mesh yarn on the outermost and next outermost portions, and the body mesh portion was 450 A knitting net, a set, and air-drying are performed in the same manner as in Example 1 using denier, a nylon 6 multifilament yarn of 15 filaments and a vinylon monofilament yarn having a single yarn fineness of 500 deniers, so that the knotting form is frog or knotted netting. Was manufactured.

The twist ratio of the vinylon monofilament having a single yarn fineness of 500 denier in the outermost periphery and the next outer periphery was 59.7% by weight. Table 1 shows the results of evaluating various performances of this frog or knot network.

In the examples, the lower twist coefficient K at the time of twisting was determined by the following equation.

[0063]

(Equation 1) T: number of priming per 10 cm D: ply yarn fineness at priming

[Table 1] As is clear from the results in Table 1, the laver net of the present invention (Examples 1 to 4) is a laver net in which twisted yarn using vinylon monofilament is used as a raw yarn is arranged on the outermost and next outer peripheral portions (Comparative Example 1, Compared with 2), the net yarn has much better bending fatigue properties.

In the laver nets of Comparative Examples 1 and 2,
The number of times the vinylon monofilament is cut is larger than the number of times the vinylon monofilament was tested (10 times or less). However, since the yarn is twisted with the nylon multifilament, stress is dispersed during the bending test. It is considered that the stress applied to the vinylon monofilament was reduced.

The laver nets of Examples 1 to 4 also have high frog and nodule strength. This is because the knot strength of the yarn is high. In addition, the water content is small and it is easy to dry. Although there is not much difference in the number of laver sprouts adhered between the example and the comparative example, the L value of the example is low and the dirt is hardly adhered. Moreover,
The laver net of Example 4 has smaller fineness and a smaller net yarn diameter than the laver nets of Comparative Examples 1 and 2, and has excellent properties in balance.

[0066]

As described above, the seaweed net of the present invention has excellent adhesion and growth of seaweed sprouts on the outermost periphery or outermost periphery of the netting, the next outer peripheral part and the body net part, and also has a flexure. It has excellent properties such as high fatigue strength and high net strength, and excellent durability, and excellent drying properties and prevention of dirt adhesion of the net. It can be preferably used as a net for culturing seaweed and mozuku, etc., which are installed in severe places.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing a state in which a laver net of the present invention is attached to an ear thread rope.

[Explanation of symbols]

 a Outermost net yarn b Next outermost net yarn c Ear thread rope

Claims (7)

[Claims] 1. A laver net which is finished so that the nodule forms a frog or nodule net. The outermost or outermost and next outermost portions have a bending fatigue resistance of 100 times or more and a knot strength of 4 g / g.
A laver net comprising a twisted yarn or a mixed twist yarn containing at least 50% by weight of a raw yarn having a single yarn fineness of 50 to 1000 deniers of d or more. 2. The laver net according to claim 1, wherein a contact angle of the raw yarn with water measured by the Wilhelmy method is 70 degrees or less. 3. The laver net according to claim 1, wherein the raw yarn is made of a synthetic resin containing 0.2 to 30% by weight of polyetheresteramide. 4. The laver net according to any one of claims 1 to 3, wherein the raw yarn is made of a polyamide containing 0.2 to 30% by weight of polyetheresteramide. 5. The fiber according to claim 1, wherein five or more concave portions having a width of 30 μ or less are formed in the surface of the raw yarn in a fiber axis direction per fiber length of 1 cm. Nori net described. 6. The laver net according to any one of claims 1 to 4, wherein the net yarn is a twist yarn consisting of only the raw yarn. 7. The method according to claim 7, wherein the net yarn is 50% by weight or more,
6. A twisted yarn comprising 50% by weight or less of at least one kind of fiber selected from polyamide fiber, polyester fiber, polypropylene fiber and polyethylene fiber having a single yarn fineness of 50 denier or less. Or the laver net according to item 1.