JP2008306958A - Agricultural net mixed with bamboo fiber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive agricultural net comprising only natural organic fiber to be harmless, and having sufficient strength to support plants, and antibacterial action, and facilitating knitting production in a net knitting process. <P>SOLUTION: This agricultural net has knots net knitted with a net knitting machine, and the yarn of the net is a twisted yarn which is obtained by mixing 5-25 wt.% of bamboo fiber with cotton fiber through making the fiber length each of cotton fiber and bamboo fiber nearly the same. The agricultural net mixed with bamboo fiber comprises using fiber which is obtained by cutting the raw material bamboo of bamboo fiber in a length excluding bamboo sections and previously removing bamboo sections and loosening fiber. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an agricultural net that is made by blending bamboo fibers that are planted on and supported by plant vines such as long bamboo shoots, cucumbers, and beans.

There are various types of agricultural nets depending on the purpose of use, but there are agricultural nets around which vines, cucumbers, beans and other vines are wound upward to support the vines and stems. Agricultural nets that support the vines of these plants are relatively large meshes, so that the load of each one is large, and the weight increases as the plants grow, so that strength is required.
Conventionally, many agricultural nets have been constructed using monofilaments, flat yarns, and tape yarns made of synthetic resin such as polyvinyl chloride and polyethylene, but recently they must be properly disposed of after use. It is obligatory. The synthetic resin has a problem that it is difficult to dispose of it because it may generate harmful gases when incinerated. In particular, in recent years, the aging of agricultural workers is also progressing, and it is becoming a burdensome work to collect and dispose of used agricultural nets.
Therefore, an agricultural net that does not use synthetic resin fibers has been proposed. In Patent Document 1, a vegetable net made of hemp fibers is used, in Patent Document 2, a long net using cotton fibers is used. A plant attraction net made of biodegradable fibers is an agricultural net whose main material is a paper string made of natural organic fibers, etc., and is combustible and easily corroded when buried in the soil. Internet has been proposed.
In addition, as a knitting machine, the structure which knits a thread | yarn with thick both ends as shown in patent document 5 is known.

Japanese Utility Model Publication No. 3-22645 Japanese Patent No. 3342247 JP 2004-337116 A JP 2005-295934 A JP 2005-298985 A

A vegetable net composed of hemp fibers, such as the conventional patent document 1, is strong and harmless to nature, but is expensive, and is not suitable as an agricultural net that is usually discarded only once. The net for long bags using the cotton fiber of Patent Document 2 is inexpensive but lacks strength, and when it absorbs rainwater, it becomes difficult to dry and the processing work becomes a burden, and the plant attraction net made of biodegradable fiber of Patent Document 3 is The cost has increased significantly, making it unsuitable as a one-time agricultural net. Patent Document 4 discloses an agricultural net mainly made of pulp paper such as natural organic fibers. Corrosion returns quickly and naturally, but the main material is pulp, so the strength is not always sufficient when it comes to a long net, and it must be thickened to ensure strength, and it absorbs rainwater when used outdoors. Because the weight Ete Drying also late, there has been a problem that the task of collection and disposal at the time of disposal is a major burden work.
In addition, it is disclosed that pulp such as natural organic fibers, particularly bamboo pulp, is used, but bamboo pulp is not flexible and cannot be smoothly knitted when knitted by a knitting machine. There was a problem that a large amount of waste was generated.
Moreover, in the cultivation of long bean paste, cucumbers, beans, etc., it must be protected from pathogenic bacteria harmful to plants, but an agricultural net having an antibacterial action was also eagerly desired.
Furthermore, what is important in these agricultural nets is that once they are used for growing crops, vines are entangled with the agricultural nets, so it is difficult to reuse them. There was a problem of not becoming.

  The object of the present invention was made in view of the above-mentioned problems, and should not be harmful naturally by knitting only with natural organic fibers, and has sufficient strength for supporting plants, An object of the present invention is to provide an agricultural net that has an antibacterial action, is easy to knitted in the knitting net process, and is inexpensive.

In order to solve the above-mentioned problems, the invention of claim 1 is an agricultural net mixed with bamboo fiber, wherein the net is knitted by a knitting machine, and the yarn of the net is made of cotton fiber. It is a twisted yarn in which 5 to 25% by weight of bamboo fiber is spun.
The invention of claim 2 is an agricultural net mixed with bamboo fiber according to claim 1, wherein the agricultural net knitted by the knitting machine is an agricultural net having a knot. To do.
The invention of claim 3 is the agricultural net mixed with the bamboo fiber according to claim 1 or 2, wherein the twisted yarn is mixed after the fiber lengths of the cotton fiber and the bamboo fiber are substantially equal to each other. It is characterized by.
According to a fourth aspect of the present invention, in the agricultural net mixed with the bamboo fiber according to any one of the first to third aspects, the bamboo fiber raw material bamboo is cut to a length excluding the bamboo knot, and the bamboo knot portion is removed in advance. Then, it is characterized by using a fiber that has been defibrated.

According to the agricultural net blended with the bamboo fiber of the present invention, since it is an agricultural net knitted only with natural organic fibers, it can be returned to the natural environment by being buried in the soil when used and discarded. Since there is an action, no harmful pathogens adhere to the plant, it is strong enough to support the plant, and the bamboo fiber has an antibacterial action, so pathogens are eliminated in the cultivation of crops.
In addition, by mixing the cotton fiber with a low bamboo fiber blending rate, the flexibility of the twisted yarn is increased and knitting with a knitting netting machine is facilitated, the amount of bamboo fiber fiber waste in the manufacturing process is small, and Since the amount of bamboo fiber that is more expensive than cotton fiber is also reduced, the manufacturing cost can be reduced.

An embodiment of an agricultural net blended with preferred bamboo fibers of the present invention will be described with reference to the drawings.
FIG. 1 shows an agricultural net 1 blended with bamboo fiber, which is used as a net for growing long bamboo shoots, and the entire shape is knitted by a knitting net machine as shown in Patent Document 5, It is roughly the same as an agricultural net of conventional polypro fiber, and it is passed over poles P about 2m in height at both ends. Making it easy. Moreover, the upper end side of the agricultural net 1 may be a pole, a rope, or a thick different yarn as in Patent Document 5, and it is only necessary to support the agricultural net 1.
This agricultural net 1 is manufactured by a conventional knitting machine that knits a knot 2 such as a cocoon or knot, and the overall size is 2.16 cm in height and 185 m in length. Is a square (corner) or rhombus (rhombus) with a side of 24 cm. The size of the mesh is usually 18 to 24 cm, and is appropriately selected depending on the item on which the long bean grows.
The agricultural net 1 of this embodiment is knitted by supplying warp and weft to a knitting machine, but the knot 2 has a warp 41 and a weft 42 as shown in FIG. A so-called double knot having a knot 21, the mesh is firmly fixed, and the manufacturing cost is low.
The yarn used in the production of bamboo fiber of this example is a twisted yarn in which 5 to 25% by weight of bamboo fiber is blended with cotton fiber, and three 400 denier twisted yarns are twisted and further twisted. 3 twisted yarns were twisted, and a total of 9 (3 × 3) twisted 400 denier yarns were twisted. The reason why nine 400 denier twisted yarns are used is that when they are used for an actual long kite, if six are used, the strength is insufficient, and if nine are used, sufficient strength can be obtained.

One of the important features of the present invention is the use of bamboo fiber. Bamboo grows in 2 years and can prevent soil destruction and contribute to environmental protection. Is also promising.
The fiber length and strength obtained vary depending on the type of bamboo used as a raw material. Usually, in order to obtain bamboo fiber with a short bamboo fiber length and strength, we devised a method for selecting raw bamboo and manufacturing the fiber. Cost. It is said that there are 600 to 1000 kinds of bamboo as a raw material, but a fiber length of at least 35 mm or more is required.
In this example, thick bamboo fiber is available, and bamboo fiber can be taken out efficiently.
[Manufacture of bamboo fiber]
Bamboo fiber is produced in the following steps (1) to (6).
(1) Cut down the Miso bamboo as raw material.
(2) Cut off the tip and remove the epidermis. This is not a good quality fiber and is removed.
(3) Cut into lengths excluding bamboo knots. The bamboo knot portion is removed in advance because the strength of the fiber is extremely reduced.
In order to obtain a fiber length of 35 mm or less, the conventional bamboo fiber manufacturing method is sufficient, but in order to finally obtain a relatively long fiber length of 35 to 40 mm, the bamboo nodes are removed in advance. This is an important manufacturing process.
(4) Put in caustic soda in water for 70 to 72 hours to soften, and after rough defibration by softening, rough defibrate by applying to a rough defibrating machine consisting of a pressure roller.
In addition, since a tensile strength will fall when bamboo fiber becomes thin too much, a rough defibrating machine is set to predetermined thickness.
(5) Further, defibration (fibrosis) is carried out for 8 to 10 hours in water to which a defibrating chemical (conventional product) such as sodium hydroxide is added, and after defibration, impurities are removed, taken out from water and dried. .
(6) By removing the defibrated bamboo material and removing the adhering chemicals, only bamboo fibers having a fiber length of 35 to 40 mm are selected and prepared from the obtained bamboo fibers. Align only the fiber length. Although this 38 mm is a long bamboo fiber, it can be manufactured with a good yield by carefully selecting the coarse defibrating machine according to the setting, the production area of Soso bamboo, etc., and carrying out the above process.
Bamboo fiber has a light brown color, and the fine spinning of the bamboo fiber is light brown. In the conventional bamboo fiber process, bleaching is usually performed, but in this example, it is buried in the soil after using the net. Since it returns naturally, unnecessary chemicals are excluded, and in order to avoid the need for unnecessary processes and high costs, no bleaching treatment or the like is performed. However, if necessary, a finishing step such as bleaching may be performed.

[Manufacture of twisted yarn for nets]
Next, a bamboo fiber and a cotton fiber are mixed and a twisted yarn for a net is manufactured in the following steps (7) to (10).
(7) As for the cotton fibers to be blended, 38 mm cotton fibers having the same length are prepared in accordance with the fiber length 38 mm of the bamboo fibers prepared in the above (6). By making the fiber length of all the fibers to be blended uniform, the twisted yarn becomes a uniform twisted yarn and the strength is increased.
Here, the fiber length of the bamboo fiber is set to 35 to 40 mm. When the fiber length is 35 mm or less, sufficient strength as an agricultural net is not obtained when twisted yarn is used. As described above, the fiber length of the cotton fiber is adjusted to be uniform so that the twisted yarn can be made uniform. This is because the yarn becomes uniform and the strength increases.
(8) 20% by weight bamboo fiber having the same fiber length of 38 mm and 80% by weight cotton fiber are mixed uniformly.
(9) Thereafter, similar to the normal cotton yarn spinning process, the twisted yarn is finished from the fluffy cotton through the rough spinning and fine spinning processes.
(10) 400 denier obtained by obtaining the twisted yarn obtained by mixing the 20% by weight of bamboo fiber and 80% of cotton fiber by the above-mentioned process. A total of 9 (3 × 3) strands of 3T / cm twisted yarns (S twisted) are twisted together with a compounding machine to finish an agricultural net twisted yarn.
The finished twisted yarn had a tensile strength of 8442 cN (gf) (test method JIS-L-1095. Tensile speed 25 cm / min. Grab interval 25 cm) and sufficiently withstand the load of the long net.

[Manufacture of agricultural nets (for long wall)]
Finally, the finished net twisted yarn is manufactured as an agricultural net in the next step (11).
(11) The knitting machine knitted into a net was manufactured by a knitting machine with a net width of 2.16 cm for knitting a knot or knot, which is a conventional knot. This knot may be a single knot or a double knot, but in this example, it was manufactured with a double knot in order to secure the mesh.
Here, as a characteristic of bamboo fiber, static electricity hardly occurs, and even cotton or silk with little static electricity is 1000V, whereas bamboo is about 84V, and by mixing this with cotton fiber, the static electricity is 100% cotton. % And can prevent entanglement, so it is easy to knit and is advantageous as an agricultural net.

In addition, since the double knot has a double knot, the yarn used is required to be flexible, and by adding cotton fiber to the bamboo fiber, the flexibility increases compared to the bamboo fiber alone, but the bamboo fiber is 50% by weight. With a blended yarn with 50% cotton fiber weight, it is still difficult to knit with a knitting network machine with yarn breakage or knitting needles entangled, and knitting is possible with a blended yarn with 30% bamboo fiber and 70% cotton fiber weight. However, there is a large amount of bamboo fiber scraps and deposits, the efficiency of knitting is reduced, and the blending limit is low. It was 25% by weight or less and the cotton fiber weight was 75% or more.
Of course, even in the knitting of a knotless knitting machine, the generation of fiber waste and deposits of bamboo fiber is reduced, but basically the same tendency, the range in which the operation of the knitting machine can be tolerated is bamboo fiber 25 It was less than wt% and the cotton fiber weight was more than 75%. This range of blended twisted yarns is particularly advantageous in knitted netting agricultural nets having double knots that are double knots.

In this way, blending cotton yarn is not flexible when there are many bamboo fibers, and as it is, it cannot be knitted well even with a knitting machine, causing problems with the knitting machine, and a large amount of bamboo fiber waste is generated. Therefore, in order to avoid this problem, by blending cotton fibers, flexibility is imparted to the blended yarn to prevent these problems.
Further, as an incidental effect, the bamboo fiber itself is expensive. Therefore, the lower the blend ratio of bamboo fiber, the lower the net price. However, if the blending ratio of bamboo fiber is too low, the strength of twisted yarn and the antibacterial action of bamboo fiber are not recognized, so the blending ratio of bamboo fiber is at least 5%.

As described above, since the agricultural net blended with bamboo fibers of the above embodiment is an agricultural net knitted with only natural organic fibers, it should be returned to nature by being buried in the soil when used and discarded. It has an antibacterial action and does not attach harmful pathogens to plants, and is strong enough to support plants. Bamboo fiber has an antibacterial action, and pathogens are used in crop cultivation. In addition, bamboo fiber has the role of an accelerator that returns to the soil when buried in the soil, corrodes faster than the case of 100% cotton twisted yarn, and returns to the soil. Knitting with a knitting netting machine is made low, the amount of bamboo fiber waste in the manufacturing process is small, and the amount of bamboo fiber that is more expensive than cotton fiber is also reduced, so the overall manufacturing cost is also low Can be.
Needless to say, the present invention is not limited to the above-described embodiments as long as the features of the present invention are not impaired.

The perspective view of the usage example of the agricultural net | network of the Example of this invention. The figure which expanded the double knot 2 of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Agricultural net 2 ... Knot 21 ... Double knot 3 ... Mesh 41 ... Warp 42 ... Weft

Claims (4)

An agricultural net knitted by a knitting machine,
The net for agricultural purposes, wherein the net yarn is a twisted yarn obtained by blending 5 to 25% by weight of bamboo fiber with respect to cotton fiber.   The agricultural net mixed with bamboo fibers according to claim 1, wherein the agricultural net knitted by the knitting machine is an agricultural net having a knot.   3. The agricultural net according to claim 1 or 2, wherein the twisted yarn is blended after the fiber lengths of the cotton fiber and the bamboo fiber are made substantially equal to each other.   The bamboo fiber according to any one of claims 1 to 3, wherein the bamboo fiber raw material bamboo is cut to a length excluding the bamboo knot, and the defibrated fiber is used after removing the bamboo knot portion in advance. Agricultural net blended with

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