JP3942603B2 - Vegetation paper string mesh - Google Patents

Description

  An object of the present invention is to provide a paper string net that is obtained by knitting a paper string made of a base paper sheeted by a wet paper machine using a specific pulp as a raw material. An object of the present invention is to provide a vegetation paper string net that can be used effectively on mountain surfaces, revetments, and the like.

  For the nets using conventional strings, we used ropes and strings made of natural fibers such as hemp and straw as strings, and synthetic fibers such as polyethylene, nylon and polyester. In particular, the former natural fibers such as hemp and straw are flammable and easily corrode even when buried in the soil, but currently there are few raw materials to produce, and the latter synthetic fibers are discarded. Occasionally, there is concern about the generation of gas that adversely affects the environment when burned, and there is a problem that it does not corrode in the soil.

On the other hand, as a net for vegetation, in addition to a wire mesh, for example, as disclosed in JP-A-2002-21087, synthetic fibers such as polyethylene, polypropylene, nylon, polyester, and acrylic, cotton, hemp, and palm fibers In addition, at least a part of a vertical string and / or a horizontal string obtained by singing or blending animal fibers, etc., is used, for example, a string body made of water-absorbing fibers having a water-absorbing process on acrylic fibers to form a two-layer structure. As is known, the wire mesh is bulky at the time of recovery, and the synthetic fiber has a problem of generation of toxic gas at the time of combustion, and both are difficult to decompose in the soil.
Furthermore, Japanese Patent Application Laid-Open No. 2002-153118 discloses a soft material formed from a decomposable component and a film-forming component on the upper surface of a sheet body knitted with corrosive fibers made of plants such as straw, hemp, and palm. A vegetation sheet with a reinforcing body is proposed, but not only is the process of attaching the soft reinforcing body complicated and expensive, but also the control of the area of the opening of the mesh is difficult, and germination of plants, It had a problem that hindered growth. Furthermore, JP-A-6-188502 describes a vegetation net formed from a material that has been subjected to antibacterial treatment and modified to be corrosive to a net body made of plastic fibers such as nylon. Because the plastic body is used for the net body, it has the problem of generation of toxic gas at the time of combustion when it is discarded, and it is not only difficult to decompose in the soil, but also enough for vegetation. It did not have water absorption and water retention.
Japanese Patent Laid-Open No. 6-185062 JP 2002-153118 A Japanese Patent Laid-Open No. 2002-21087

  The present invention has been made in view of the above circumstances, does not generate toxic gas even when burned, has a good soil assimilation property even if embedded in the soil as it is, the thickness of the string, the mesh The purpose of the present invention is to provide a paper net that can be applied to various purposes by arbitrarily setting the size, and a vegetation net that has water absorption and water retentivity essential for vegetation. is there.

The present invention has been made as a result of intensive studies in order to solve the above problems .

The invention of claim 1 includes softwood pulp, manila hemp pulp, sisal hemp pulp, flax pulp, cotton pulp, linter pulp, cannabis pulp, jute pulp, trifoam pulp, persimmon pulp, crust pulp, lint pulp, bamboo pulp, kenaf pulp and bagasse pulp at least one pulp seeds meshwork consisting paper string consisting of a base paper as a raw material, vegetation for paper string reticulated, characterized in that the vegetation material such as manure is pasted paper adhering selected from a body, of the invention of claim 2, a vegetation sheet string reticulated structure according to claim 1, the basis weight of the base paper is characterized in that it is a 20 to 80 g / m ^2, the invention of claim 3 is , the base paper is vegetation paper string reticulated structure according to any one of claims 1 to 2, characterized in that those papermaking by cylinder paper machine, wherein Invention a fourth aspect, the vertical / horizontal ratio of is tensile strength measured by JISP 8113 of the base paper, vegetation sheet according to any one of claims 1 to 3, characterized in that from 5 to 15 a string meshwork, the invention of claim 5, in vegetation paper string reticulated structure according to any one of claims 1 to 4, wherein the paper string reticulated body is composed of knotless net is there.
The invention of claim 6 is a vegetation sheet string reticulated structure according to any one of claims 1 to 5, characterized in that the wet strength agent is contained in the base paper, claim The invention according to 7 is characterized in that the wet paper strength enhancer comprises at least one selected from polyamide epichlorohydrin resin, epoxy resin, melamine resin, urea resin, dialdehyde starch, polyacrylamide and polyethyleneimine. The vegetation paper string net according to claim 6 .

The present invention will be described in detail below.
Base papers constituting the present invention are softwood pulp, manila hemp pulp, sisal hemp pulp, flax pulp, cotton pulp, linter pulp, cannabis pulp, jute pulp, cocoon pulp, persimmon pulp, crust pulp, lint pulp, bamboo pulp, kenaf pulp and At least one kind of pulp selected from bagasse pulp is used as a raw material. Various softwood pulps such as kraft pulp and sulfite pulp can be applied as the softwood pulp.
The pulp may be bleached pulp or unbleached pulp. Moreover, the tensile strength required for the paper string can be maintained by adjusting the raw material so that at least 70% or more of the pulp raw material becomes the above pulp.
In this case, these pulps may be used alone or as a mixture of several kinds.
As other pulp that can be mixed with the above-mentioned pulp, various pulps such as hardwood pulp, esparto pulp, straw pulp and the like, and waste paper pulp can be blended within a range that does not impair the strength of the paper.
These pulps are subjected to a beating process using a beater such as a beater, and then used as raw material for base paper.

The degree of the beating process is set according to the use of the string after twisted paper, and it is necessary to advance the beating when trying to obtain a high-strength paper string. In this case, increasing the blending ratio of Manila hemp is effective for obtaining a high-strength paper string.
The base paper of the present invention may contain additives such as a wet paper strength enhancer, various fillers, sizing agents, and yield improvers, if necessary.
In particular, the wet paper strength enhancer is effective in preventing deterioration of paper strength due to rainwater for a certain period when the paper string net of the present invention is used for vegetation. In this case, the wet paper strength enhancer is not particularly limited, but at least selected from polyamide epichlorohydrin resin, epoxy resin, melamine resin, urea resin, dialdehyde starch, polyacrylamide and polyethyleneimine. One type can be suitably applied to the present invention.
As the sizing agent, in addition to the rosin type, internal sizing agents such as alkyl ketene dimers and alkenyl succinic anhydrides and various synthetic polymer type surface sizing agents can be used.
Furthermore, the yield improver is added to reduce the loss of pulp and filler in the paper machine and improve the yield of papermaking. For example, organic polymer electrolytes such as polyacrylamide and aluminum sulfate are representative. The inorganic salts are applicable to the base paper of the present invention.

Production of the base paper constituting the present invention is carried out by making a papermaking raw material slurry in which the above raw materials are blended at a predetermined ratio with a wet paper machine.
The wet paper machine for making the base paper of the present invention is not particularly limited, such as a long net and a circular net paper machine, which are applied to general paper making technology, but has sufficient tensile strength necessary for the paper string net. In order to ensure, it is preferable to use a circular net paper machine.
The basis weight of the base paper of the present invention is preferably ²⁰ to 80 g / m ² , more preferably 30 to 50 g / m ² . If the basis weight is less than 20 g / m ² , it is easy to cut at the time of twisted paper, and if it exceeds 80 g / m ² , the rigidity becomes high and it is difficult to twist.

  The base paper constituting the present invention is a single-layer paper made of 100% of one kind of pulp selected from the above-mentioned plurality of kinds of pulp or a mixed paper of the plurality of pulp components, and two to three layers of paper. A configuration using laminated paper may also be used. The base paper of the present invention preferably has a tensile strength aspect ratio of 5 to 15 in a normal state according to JIS P8113. If the aspect ratio of the tensile strength is less than 5, the paper may be cut when slitting into a tape-like shape from the base paper during the manufacture of the paper string. This is not preferable because there is a risk of tearing in the vertical direction when slitting into a pit.

  The base paper obtained by the above process is processed into a paper string by slitting it into a tape with a width of 5 to 50 mm and a winding length of about 500 m, cutting it into a tape, setting it on a twisting machine and twisting it. Is done. The paper string used in the present invention is preferably used alone from the viewpoint of cost, but some may be knitted and used as necessary. The thickness of the paper string is not particularly limited, but a diameter of about 1 to 10 mm is preferable from the viewpoint of ease of handling.

In order to produce the paper string net of the present invention using the paper string obtained in the above-mentioned process, it is knitted into a knotted net or a knotless net by a normal net manufacturing technique using a knitting netting machine. That's fine.
It is particularly preferable that the paper string net of the present invention is knitted into a knotless network. By knitting a knotless net, the joints are flat and the weight is light and not bulky. There is an effect of improving workability. In addition, since the mesh is accurate and there is no drop, the appearance is good when applied to a slope for vegetation. Furthermore, since a knotless net is more likely to fray compared to a knotless net, it has the advantage of being easy to homogenize to soil when used for vegetation.
In addition, when the paper string net of the present invention is supplied as a knotted net, it is preferable to impregnate the paper string with oil or the like in advance.

Since the material of the paper string network of the present invention is composed of a specific pulp, it is excellent in assimilation into the soil during disposal even if applied for any purpose, so that it is ecological (ecologic). In addition, by adjusting the thickness, physical strength, and knitting interval of the vertical and horizontal strings constituting the network, it is possible to arbitrarily impart characteristics according to the application.
And, when applying the paper string net of the present invention to vegetation, if water resistance is imparted to the base paper with a wet paper strength enhancer, water resistance that can withstand it even if exposed to rainwater for a long time is maintained. However, the water-absorbing characteristic of the base paper by the wood pulp can stably retain the absorbed rainwater, promote the germination and growth of seeds, and can be expected to have the effect of greening and strengthening the slope.

  Examples of a knotless network applicable to the paper string net of the present invention are given as FIGS. That is, FIG. 1 is called a penetration type and has a structure in which the yarns of two mesh yarns cross each other, and the mesh yarn has a structure extending linearly through the connecting portion. FIG. The mesh yarn is crossed 2 to 3 times, and the mesh yarn has a zigzag structure. Fig. 3 shows a tortoiseshell type 2 yarn mesh yarn 3 to 4 times. The net yarn has a structure that extends linearly through the connecting portion. FIG. 4 is called a Russell net, which is a net made of a so-called “lace net”, and FIG. It is called koji net (ordinary moji net), twisted warp yarns and meshed through weft yarn in the meantime, Fig. 6 is called moji net (modified moji net) and twisted the above weft yarns, misalignment FIG. 7 is a diagram in which yarns are simply crossed with a woven mesh, and these are all embodiments of the paper web of the present invention.

In the present invention, various uses can be developed by arbitrarily adjusting the thickness of the paper string and the size of the mesh.
The paper string network of the present invention may be coated or impregnated with a resin component for the purpose of imparting water resistance or improving physical strength, if necessary. In this case, the application or impregnation of the resin component may be performed in advance on a stage before processing into a mesh body, that is, on a paper string or base paper.

To use this manner paper string reticulated body created by a for vegetation, previously seed to those network body is laid on the slope face pasted paper vegetation material is adhered, such as fertilizer. Moreover, vegetation for paper string reticulated body of the present invention, or buried in the ground of soil or slope, of the field of agricultural and horticultural, by laying on their ground surface, imbibition constituting the reticulated body The sex paper string absorbs rainwater and stably retains the absorbed rainwater, thereby promoting seed germination and growth .

Hereinafter, the present invention will be described in more detail with reference to examples.
Example 1
A domestic slurry of unbleached kraft pulp (NUKP) produced in Japan was beaten to 60 ° SR to prepare an aqueous slurry, and a wet paper strength enhancer made of polyamide epichlorohydrin resin (made by Showa Polymer Co., Ltd., trade name “Polyfix 301”). )) Was added to the aqueous slurry so as to be 2% to prepare a papermaking raw material. The raw material was applied to a circular paper machine to prepare a base paper having a basis weight of 30 g / m ² .
When the tensile strength of the obtained base paper was measured according to JIS P8113, the longitudinal direction was 8.6 kg / 15 mm, the transverse direction was 1.6 kg / 15 mm, and the aspect ratio was 5.4. .
Next, this base paper was slit into a strip with a width of 40 mm using a bobbin winder, and this was set on a twisting machine and twisted 28 times / 30 cm to produce a paper string having a diameter of 3 mm. . The strength of the paper string was 15 kg as measured by JISZ1518.
This paper string was applied to a commercially available knitting netting machine, and a through-type knotless net according to the present invention shown in FIG. 1 was prepared.
A vegetation net is created by adhering a normal vegetation base material, that is, a thin paper to which plant seeds, fertilizer, and soil conditioner are adhered and held with PVA glue on one side of the woven netting net. did.
This vegetation net was laid on the slope of the hillside formed by road construction and fixed with anchor pins. As a result, the roots of the plants that were inherent to the vegetation base of the net became tight on the slope in a few years, and even if natural phenomena or artificial ground loosening, the slope collapses. I never did. Of course, it was also confirmed that the paper string net of the present invention is homogenized with soil over time and contributes to further growth of plants.

Example 2
NUKP80 wt% Manila hemp pulp 20% by weight and a mixture of 60 ° SR and beaten in an aqueous slurry - outside that created has created a base paper under the same conditions as in Example 1.
When the tensile strength of the obtained base paper was measured according to JIS P8113, the longitudinal direction was 11.8 kg / 15 mm, the transverse direction was 2.1 kg / 15 mm, and the aspect ratio was 5.6. .
Using this base paper, a paper string and a paper string net were prepared under the same conditions as in Example 1 , and a vegetation net was further prepared in the same manner as in Example 1 .
This vegetation net was laid on the slope of the mountainside formed by road construction and fixed with anchor pins. As a result, the roots of the plants that were inherent to the vegetation base of the net became tight on the slope in a few years, and even if natural phenomena or artificial ground loosening, the slope collapses. I never did. Of course, it was also confirmed that the paper string network of the present invention became homogeneous with soil over time and contributed to further growth of plants.

Example 3
An aqueous slurry was prepared by beating domestic softwood unbleached kraft pulp (NUKP) to 50 ° SR, and a wet paper strength enhancer made of polyamide epichlorohydrin resin (trade name “Polyfix 301”, manufactured by Showa Polymer Co., Ltd.). )) Was added to 2.5% of the aqueous slurry to prepare a papermaking raw material. The raw material was applied to a circular paper machine to produce a base paper having a basis weight of 41.5 g / m ² .
When the tensile strength of the obtained base paper was measured according to JIS P8113, the longitudinal direction was 13.1 kg / 15 mm, the transverse direction was 1.9 kg / 15 mm, and the aspect ratio was 6.8. .
Using this base paper, a paper string and a paper string net were prepared under the same conditions as in Example 1 , and a vegetation net was further prepared in the same manner as in Example 1 .
This vegetation net was laid on the slope of the mountainside formed by road construction and fixed with anchor pins. As a result, the roots of the plants that were inherent to the vegetation base of the net became tight on the slope in a few years, and even if natural phenomena or artificial ground loosening, the slope collapses. I never did. Of course, it was also confirmed that the paper string network of the present invention became homogeneous with soil over time and contributed to further growth of plants.

Comparative Example 1
A mixed pulp of 60% by weight of unbleached kraft pulp (LUKP) and 40% by weight of unbleached kraft pulp (NUKP) made of hardwood from foreign countries is beaten to 55 ° SR to create an aqueous slurry, and polyamide epichlorohydrin is made into this A wet paper strength enhancer made of resin (made by Showa Polymer Co., Ltd., trade name “Polyfix 301” ) was added so as to be 2% with respect to the aqueous slurry to prepare a papermaking raw material. The raw material was applied to a long paper machine to produce a base paper having a basis weight of 26.9 g / m ² .
When the tensile strength of the obtained base paper was measured according to JIS P8113, the longitudinal direction was 5.1 kg / 15 mm, the transverse direction was 1.7 kg / 15 mm, and the aspect ratio was 3.0. .
Next, this base paper was slit into a strip of 40 mm width with a bobbin winder, and this was set on a twisting machine and twisted 28 times / 30 cm to create a paper string having a diameter of 3 mm. However, frequent paper breaks have made it difficult to create a string.

The paper string network of the present invention is composed of a specific pulp, so even if it is applied for vegetation, it is excellent in assimilation into the soil during its disposal, so that it is ecological and environmentally friendly (ecologic). Also) .

Plan view of a through-type knotless network according to the present invention Plan view of a staggered nodular net according to the present invention Plan view of turtle shell-shaped nodule net according to the present invention The top view of the knotless network which consists of a Russell network concerning the present invention The top view of the knotless net which consists of a normal net according to the present invention The top view of the knotless network which consists of an improved string according to the present invention The top view of the knotless net which consists of a woven net concerning the present invention

Claims (7)

At least one selected from softwood pulp, manila hemp pulp, sisal hemp pulp, flax pulp, cotton pulp, linter pulp, cannabis pulp, jute pulp, trilobium pulp, straw pulp, scab pulp, lint pulp, bamboo pulp, kenaf pulp and bagasse pulp A vegetation paper string net, which is formed by pasting a paper having seeds, fertilizers and other vegetation materials attached to a net composed of a string made of pulp made of pulp. Vegetation paper string reticulated structure according to claim 1, wherein the basis weight of the base paper is 20 to 80 g / m ^2. Vegetation paper string reticulated structure according to any one of claims 1 to 2, wherein the base paper is those papermaking by cylinder paper machine. Vegetation paper string reticulated structure according to any one of claims 1 to 3 vertical / horizontal ratio of is tensile strength measured by JIS P 8113 of the base paper, characterized in that from 5 to 15. Vegetation paper string reticulated structure according to any one of claims 1 to 4, wherein the paper string reticulated body is composed of knotless net. Vegetation paper string reticulated structure according to any one of claims 1 to 5, characterized in that the wet strength agent is contained in the base paper. The wet strength agent, claim 6, wherein the polyamide epichlorohydrin resins, epoxy resins, melamine resins, urea resins, dialdehyde starch, in that it consists of at least one selected from polyacrylamide and polyethylene imine The vegetation paper string net described in 1.

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