JP2001352844A - Farming net - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a farming net capable of being used for various purposes as well as being easily disposed of after used. SOLUTION: This farming net 1 is such as to be formed by weaving/knitting warps 2 and wefts 3; wherein monofilaments and/or tape yarns are used as the above-mentioned warps 2 and wefts 3 to form appropriate-sized and lattice- shaped meshes, and also at least either of the above-mentioned warps 2 or wefts 3 is made from a biodegradable material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an agricultural net for adjusting the growth conditions of agricultural crops, for example, insect repellent, weed-proof, wind-proof, hail-proof, shading, heat-shielding and the like.

[0002]

2. Description of the Related Art There are various types of agricultural nets according to the purpose of use, and there is a remarkable effect such as insect repellent, grass weed control, light shielding, and the like, which is in great demand. In particular, in an agricultural net having lattice-shaped eyes, by appropriately setting the mesh size, breathability and water permeability can be freely set, and a high strength without misalignment can be obtained. It is widely used for many purposes.

However, many agricultural nets are constructed using monofilaments, flat yarns, and tape yarns made of synthetic resins such as polyvinyl chloride and polyethylene. Therefore, after use, they must be properly disposed of. In other words, they are collected and incinerated, but in recent years, if they are indiscriminately incinerated, there is a problem that harmful gas may be generated and disposal is difficult. In recent years, especially in recent years, the aging of agricultural workers has advanced, and collecting and disposing of used agricultural nets is becoming a burdensome operation.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an agricultural net which can be easily disposed after use.

[0005] A means for this is an agricultural net formed by weaving and knitting a warp and a weft, and a monofilament or a tape yarn is used as the warp and the weft to form an appropriately large lattice-like mesh. It is an agricultural net formed by forming a warp or a weft from a biodegradable material that is decomposed in a natural environment. For example, the warp may be formed of a biodegradable material, the weft may be formed of a biodegradable material, or both the warp and the weft may be formed of a biodegradable material. Is preferably formed of a biodegradable material.

In order to obtain an agricultural net having necessary conditions such as strength, the biodegradable material should be composed of polylactic acid, especially a biodegradable material mainly composed of poly-L-lactic acid. Good. In this case, because of the raw material (starch) of polylactic acid, it is possible to reduce the amount by a predetermined treatment, that is, hydrolysis or crushing under high temperature and high humidity, and then compost it. This is because these have the advantage that they are further utilized for growing plants and that circulation in the natural world is established.

In other words, the warp and the weft are woven and knitted using a monofilament, a tape yarn, a warp or a weft, a monofilament, and a weft or a warp using a tape yarn. If the size of the eyes is set to a small size by plain weaving using a monofilament, it will be an agricultural net for insect control, and if the size of the eyes is set appropriately by Russell knitting, windproof, hailproof, animal avoidance agricultural Become the net. Furthermore, if the warp and weft are plainly woven relatively densely using dark colored tape yarns, the weed-proof sheet may be used with black or silver, white or other appropriate colored tape yarns alone or in an appropriate combination for the warp or weft. Plain weaves make it an agricultural net with shading and heat shielding. In such an agricultural net, since at least one of the warp and the weft is biodegradable, it may be used as it is in the case of a weed prevention sheet, but if it is buried in the soil after use for a certain period of time until its useful life. Biodegradable parts are broken down by natural power and returned to the soil.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An agricultural net 1 according to the present invention is an agricultural net 1 woven and knitted with a biodegradable warp 2 and a weft 3. Here, biodegradation means that the microorganisms are decomposed and disappear in a natural environment such as microorganisms in the soil, that is, returned to the soil.

Various biodegradable materials have been developed. For example, using a biodegradable material formed into flat yarn or monofilament using a resin having a trade name such as materby, nobon, ecowear, bacterial cellulose, burlan, bionole, lacti, lacia, karamii, polyglutamic acid, lunare, lactone, etc. Good.

[0010] Preferably, a biodegradable material composed of polylactic acid using starch as a raw material is preferred, and more preferably, a biodegradable material composed mainly of poly-L-lactic acid. This is because it has excellent mechanical properties such as tensile strength and tensile elasticity and is suitable for agricultural nets.

Poly-L-lactic acid is an optical isomer of poly-D-lactic acid, and a polylactic acid monofilament or a polylactic acid tape yarn is produced using these copolymers as a main component. At this time, since the ratio between the L-form and the D-form affects the biodegradability, it is preferable to use a material whose optical purity of the L-form is in the range of about 95.0 to 99.5%. If the purity of the L-form is lower than the above range, the biodegradation rate will be high, and if the purity of the L-form is higher than the above range, the biodegradation rate will be low. In order to give the agricultural net 1 the necessary strength and elasticity, it is preferable to use a material having an average molecular weight of polylactic acid of 70,000 or more.

An agricultural net 1 can be obtained by appropriately weaving and knitting using a monofilament or a tape yarn made of such a biodegradable material. Each figure is a partial plan view showing an example of the agricultural net 1.

The agricultural net 1 shown in FIG. 1 is formed by forming a transparent or milky white polylactic acid monofilament as a warp 2 and a weft 3 by plain weaving, and the mesh size is 1 × 1 mm or the like.
The size is set small enough to prevent insects from entering.

The agricultural net 1 for insect repellent is used, for example, by covering it in the form of a tunnel on agricultural products, and includes a warp 2 and a weft 3.
If the polylactic acid monofilament constituting the above is used for a predetermined endurance period, it may be removed, collected and buried in the soil at a predetermined place. It is gradually degraded by microorganisms in the soil and all disappears.

The agricultural net 1 shown in FIG. 2 is made of a polylactic acid monofilament mixed with a pigment of an appropriate color so as not to impair its transparency or basic characteristics. And large lattice-shaped eyes are formed as appropriate. The lattice shape is not limited to having only a strict lattice shape as in the case of plain weaving, but it is sufficient if the lattice shape is rough, and also includes a case where the yarn runs in the bias direction. If the size of the eyes is set to a small value, the net becomes an agricultural net 1 effective for windbreak and hail protection. It becomes the agricultural net 1 for animal repellent.

Such an agricultural net 1 is stretched using a support or the like, and after being used for a predetermined period according to the durability of the polylactic acid monofilament, which is a raw material of the warp 2 and the weft 3, it is collected and collected at a predetermined place. If buried in the soil, it will be decomposed and eliminated by microorganisms in the soil after a certain period of time.

The agricultural net 1 shown in FIG. 3 has a myriad of small eyes and is a grass-proof agricultural net 1 having a sheet-like appearance. In this agricultural net 1,
A film formed by appropriately mixing carbon black or a dark pigment such as dark green into warp yarn 2 and weft yarn 3 is slit to form a tape yarn. It is densely plain-woven so as to have high light-shielding properties.

The agricultural net 1 effective for weed control thus constructed is used by laying it on a portion where weeds are not desired to grow, such as the base of agricultural products. In this case, the bacteria in the soil come into contact with the soil, so that the agricultural net 1 has a herbicidal action while it is in the form, and if left as it is, it is decomposed after a predetermined period and returns to the soil.

The agricultural net 1 shown in FIG. 4 has high air permeability and heat shielding properties, and can be used for creating an environment in a house. The tape yarn is formed by slitting a film obtained by mixing a silver pigment into the warp yarn 2 and the weft yarn 3 and is plain-woven so as to have a relatively large lattice-like mesh. Then, the intersection of the warp 2 and the weft 3 is heat-sealed so as not to cause misalignment.

The agricultural net 1 constructed as described above is used by being stretched on a ceiling surface or the like in a house. After being used for a predetermined period, if it is collected and buried in soil, it is decomposed by natural force.

Therefore, in the agricultural net 1 as in the above-mentioned example, if it is collected after use and put together with soil in the same manner as fallen leaves, it is decomposed and returned to soil. For this reason, it is not necessary to collect and incinerate the waste, and the treatment after use can be easily performed even by the elderly.

The agricultural net 1 may be formed by appropriately combining biodegradable materials according to the mechanical properties and the like.

[0023]

As described above, according to the present invention, agricultural nets in high demand can be naturally disassembled, and disposal after use can be simplified. In other words, it is not necessary to incinerate after collecting, just bury in the soil. Moreover, generation of toxic gas can be prevented. Because of the simplicity of disposal, the effect is particularly remarkable in aging agriculture.

Further, since the grid-shaped eyes are formed by the biodegradable warp and the weft, the same function as that of the conventional agricultural net having the grid-shaped eyes can be obtained. A more advantageous agricultural net can be obtained in terms of handleability.

[Brief description of the drawings]

FIG. 1 is a partial plan view showing an example of an agricultural net.

FIG. 2 is a partial plan view showing an example of an agricultural net.

FIG. 3 is a partial plan view showing an example of an agricultural net.

FIG. 4 is a partial plan view showing an example of an agricultural net.

[Explanation of symbols]

 1 ... agricultural net 2 ... warp 3 ... weft

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Claims (5)

[Claims] An agricultural net formed by weaving and knitting a warp and a weft, wherein the warp and the weft are formed by using a monofilament or a tape yarn as the warp and the weft to form a large lattice-like mesh as appropriate. Agricultural nets made of biodegradable materials. 2. The agricultural net according to claim 1, wherein said warp is formed of a biodegradable material. 3. The agricultural net according to claim 1, wherein said weft is formed of a biodegradable material. 4. The agricultural net according to claim 1, wherein both the warp and the weft are formed of a biodegradable material. 5. The agricultural net according to claim 1, wherein the biodegradable material is a material containing polylactic acid as a main component.