JPS601514B2 - tube - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tube that is inexpensive, lightweight, and easy to handle, and is easy to construct or install, and to accommodate, transport, and store.

Particularly suitable for irrigation, the tube is suitable for watering a wide range of media since the watering area is controlled, and is bendable for changing the spacing of cultivated plants or changing the irrigation area. Because it can be freely applied and installed in any shape, it can overcome constraints caused by the subject of ditch water, how it is planted, and the topography.Furthermore, it can be used not only with water but also with liquid fertilizers, water-soluble insecticides, acaricides, and water-soluble acaricides. Water sprays containing mold, viricides, water-repellent herbicides, dustproofing agents, and other chemicals may also be used.
relates to a tube that can be rinsed and has extremely wide applicability. More specifically, it is a tube having an outer layer made of a water-impermeable film made of thermoplastic synthetic resin, and has 4 holes spaced apart on its surface, and a coating film made of the film covers each of the small holes. The present invention relates to a bendable tube characterized in that a covering membrane is integrally bonded to an outer layer around a small hole, covering a part or all of the hole and leaving a lotus passage.

For purposes such as irrigation for agriculture and horticulture, port water for dustproofing sandy areas, bare areas, and rinsing for snow melting, hard synthetic resin pipes and metal pipes with numerous small irrigation holes are installed above and below ground. Alternatively, they are installed underground and rinsed with water.

However, these hard synthetic resin pipes and metal pipes have the disadvantage that piping work for construction or installation is not easy and they are expensive. Furthermore, there is the disadvantage of having more pipe joints, and since the piping cannot be changed easily, it takes a lot of effort to re-do the piping to adapt to changes in the spacing of cultivated plants, the shape of the watering area, etc. There are flaws that make it difficult and expensive. In addition, these irrigation pipes are usually used with a large number of small holes of 0.3mm to 3mm diameter perforated at intervals, but when water is released from the small holes and sprinkled, these holes are used. In hard pipes,
Many of them are fixed with joints, etc., making it impossible to change the direction of watering as the crop grows, and when watering over a wide area far from the irrigation pipe, water gets on the leaves of the crop, which is not good for growth. .

For this reason, when using hard pipes, it is conceivable to provide nozzles at each water sprinkling port, but this has the disadvantage of being expensive. The present inventors conducted research in order to overcome the disadvantages or defects of the above-mentioned subordinate hard metal pipe.

As a result, we created a bendable tube made of thermoplastic synthetic resin film, which has a cylindrical shape when water is flowing through it, and has many small holes such as slits arranged at appropriate intervals along its length. It was devised to provide a heat-sealed coating membrane on the outer layer around the pores, covering part or all of the pores and leaving a lotus passage through which the water spray passes, thereby making it inexpensive, lightweight, and easy to handle. It has the advantages of being easy to install, install, transport, and store, and is disposable, as well as being easy to change and adjust the construction according to the spraying area, and controlling the scattering trajectory of the sprayed water. It has been discovered that water can be sprayed over a wide distance and over a wide area.Depending on the purpose of use of the product of the present invention, it is preferable to provide an inner layer B having the purpose of water pressure control, filtering, etc. in addition to the outer layer A.

In other words, water used for water replenishment purposes contains a considerable amount of minute solid particles, such as water from rivers, lakes, or wells, which can clog the small holes in the tubes. , there is a risk that its watering capacity will decrease in a short period of time.

For this purpose, a bendable inner layer B, preferably made of a non-woven fabric, is located inside the outer layer A and also serves as a perforation layer.
By providing this, the fear of clogging can be overcome and a wide area can be irrigated with an appropriate amount of water at a low water supply pressure. Additionally, the outer layer of the present invention has at least one continuous heat-sealed portion extending along its length, which helps to prevent meandering and other undesirable movement during sloping waters. .

For heat sealing, methods such as hot pressing and melt sealing are used. Moreover, it is advantageous to fix the inner layer to the outer layer at the same time when forming the heat-sealed portion. This heat-sealed part has two parts on both ends to prevent meandering movement.
It is desirable to provide this. Furthermore, the outer layer and the inner layer are separated from each other in most of the areas including at least the pores for water introduction in the outer layer. It has been found that the above-mentioned improvement effects are further promoted by the above-mentioned distance. SUMMARY OF THE INVENTION Accordingly, the object of the present invention is to provide a water-replenishing structure which has many of the above-mentioned improved properties, expands and assumes a cylindrical shape when water is flowing through it, and has a flat-shaped structure when water is not flowing through the structure.

Furthermore, another object of the present invention is to provide a method for manufacturing such a structure industrially at low cost and easily.
A third object of the present invention is to provide a field for cultivating fruit trees, a greenhouse cultivation area, a meadow, a lawn, characterized by using this structure.
Methods for conveying water to agricultural and horticultural land such as afforestation land and/or its cultivated plants; Methods for irrigating sandy soil, bare land, roads, and other dust-generating areas to prevent dust; Methods for irrigating snowy areas for melting snow; etc. To provide a method of rinsing water. In the following, a particularly preferred tube of the present invention having an outer layer B will be described, but as is clear from the above description, the inner layer B can be removed if necessary. The tube of the present invention includes a bendable outer layer A, and a water-permeable and water-insoluble sheet material located inside the outer layer A and fixed at a heat-sealed portion of the outer layer A or at a position parallel to the heat-sealed portion. It consists of a flexible inner layer B consisting of at least one layer of.

Outer layer A: at least one layer extending along the length of the outer layer
It is made of a thermoplastic synthetic resin film having two continuous heat-sealed parts and a large number of small holes such as slits arranged at appropriate intervals in the length direction of the outer layer.

This film is made water permeable by small pores, through which water is released. The portion of the film other than the small pores is substantially water-impermeable, and the film itself is water-insoluble. The thermoplastic synthetic resin film forming the outer layer A is formed of any synthetic resin film that provides flexibility to the outer layer.

Examples of such synthetic resins include polymers or copolymers of ethylene, propylene, 1-buteso, 4-methyl-1-pentene, and other olefins, or copolymers of one or more of these olefins with dienes. Olefinic synthetic resins such as polymers; polymers of styrene, vinyl alcohol, acrylic acid, alkyl acrylates, methacrylic acid, alkyl methacrylates, vinyl chloride, vinylidene chloride, vinyl acetate, and other vinyl compounds. Pinyl-based synthetic resins such as polymers or copolymers, or copolymers of one or more of these pinyl compounds with an olefin that can be polymerized: polyethylene terephthalate, polyethylene-2,6
Ester-based synthetic resins made from naphthalates, other glycols or their functional derivatives, and dicarboxylic acids or their functional derivatives: Amide-based synthetic resins such as nylon: Polyurethanes: Any other synthetic resin materials Or you can give a mixture of them. These synthetic resin films may be foamed films. The film may also contain UV inhibitors, antioxidants, inorganic and organic fillers, colorants, and other additives. The thickness of the outer layer A is not particularly limited as long as it expands and takes on a cylindrical shape when water is passed through it, and takes on a flat shape when water is passed through it, and is appropriately selected depending on the type of synthetic resin used. 0.05 to about 2
．． A W snout is suitable. Note that the shape and length of the small irrigation holes provided in the outer layer A can be changed as appropriate.

The shape of the small hole can be square, circular, semicircular, slit, other arc shapes, X-shape, T-shape, Y-shape, etc., but it is suitable for irrigation water use for agriculture and horticulture. A circular or square shape is suitable for this. Inner layer B: Inner layer B is made of a water-permeable and water-insoluble sheet material.

The water permeability of the inner layer can be changed in various ways, but it is greater than the water permeability of the outer layer, and at a water pressure of 0.2 kg/G, it is about 30 so/min/m or more, preferably 60 so/min.
It is desirable that it is at least in/m. As inner layer B,
A thermoplastic synthetic resin fibrous material formed into a sheet material by dry or wet sanding is semi-molten or the surface of the fibrous material is heated at a temperature higher than the melting point of the thermoplastic synthetic resin. By paper-making water-permeable nonwoven fabrics, paper-like materials, thermoplastic synthetic resin fibrous materials, and other fibrous materials that do not melt at the melting point of the resin, which are bonded together in a partially molten state. Suitable for use as a furnace filter material, which is formed into a sheet and is bonded by heat treatment at a temperature higher than the melting point of the thermoplastic synthetic resin and at a temperature at which other fibrous materials do not melt. Water-permeable nonwoven fabric or paper-like material is used.

These fibrous materials of thermoplastic synthetic resin include the fibrous material of thermoplastic synthetic resin (
(including synthetic pulp) are used. Among the synthetic resins exemplified for the outer layer A, the thermoplastic synthetic resin fibrous materials used for forming the latter water-permeable sheet-like material include fibrous materials of synthetic resins that melt at low temperatures and at higher temperatures. A combination with a fibrous material of other synthetic resin that can be melted at a low temperature, or a fibrous material partially composed of a synthetic resin that melts at a low temperature and a synthetic resin that melts at a higher temperature, and vegetable fibers, Natural or recycled fibers such as recycled fibers and animal fibers, mineral fibers such as asbestos, glass wool, and rock fibers, and combinations of these with synthetic resin fibers having a high melting temperature can be used.

Furthermore, these water-permeable sheet materials may be structures containing talc, shirasu balloons, calcium carbonate, rubber particles, synthetic resin particles, and the like.

Among these, fibrous materials called synthetic pulp of thermoplastic synthetic resins such as polyethylene and polypropylene, synthetic resin fibrous materials such as polyvinyl alcohol with a higher melting point, mineral fibrous materials such as glass wool, or any mixture thereof. After wet or dry papermaking, heat treatment is performed to melt some of the thermoplastic synthetic resin fibrous materials to fix the fibrous materials, such as nonwoven fabrics and paper materials, as well as polyethylene fibrous materials and polypropylene. As in the case of a combination of fibrous materials, the fibrous materials of synthetic resin with a low melting point and synthetic resin with a high melting point are made into a sheet-like material using a dry or wet method, the polyethylene with a low melting point is melted, and the polypropylene with a high melting point is melted. Nonwoven fabrics, paper-like materials, etc. prepared without melting are particularly preferably used.

The water-permeable sheet-like material of the inner layer B is made of a type of fibrous material,
By appropriately selecting the size, shape, proportion of different types of fibers used, thickness of the sheet material, etc., it is possible to obtain a sheet material with a desired small irrigation pore diameter and water permeation amount.

The diameter of the irrigation holes in inner layer B is then such that the diameter of the irrigation holes in inner layer B is such that solid debris that may block the irrigation holes in outer layer A can be filtered out of the feed water. Although it is determined appropriately depending on the type of miscellaneous material, the maximum pore diameter is generally 500 mm.
It is adjusted to below r, preferably below 200 French.

The diameter of the small irrigation pores in the outer layer A is preferably 1.5 times or more, preferably 3 times or more, and more preferably 5 times or more the diameter of the port water pores in the inner layer B. In addition, in the product of the present invention, the diameter of the irrigation small hole is determined as follows.

The sheet-like material constituting the inner layer B is shaped into a cylinder, one end of the cylinder is closed, and an aqueous slurry in which glass pellets having a particle size distribution of 1 mm to 2,000 mm is suspended is poured into the cylinder. Press in from the pond edge with a pressure of 0.2k9/youG.

Among the glass beads that flowed out from the wall of the cylinder along with the water, the diameter of the glass ball with the largest diameter is defined as the diameter of the water pores in the inner layer B. When the inner layer B is composed of multiple layers of water permeable sheet materials, it is composed of at least two layers of water permeable sheet materials separated from each other, and among these sheet materials,
It is preferable that the water permeability of the sheet-like material located on the inner side is greater than the water permeability of the sheet-like material located on the outer side. The ripple water structure of the present invention expands into a cylindrical shape when water is flowing through it, and has a fan-flat tubular shape when water is not flowing through it. This is to avoid the disadvantage that when the drainage is stopped, dirt and other solid matter is sucked into the small hole from the outside of the water drainage hole, enters the hole, and blocks the drainage hole.

For this purpose, the flexible outer layer A and the flexible inner layer B are spaced apart from each other in most areas of the outer layer A, including at least the small water supply holes, preferably in substantially all areas other than the heat-sealed portion. There is.

The inner layer is located inside the outer layer, and the combined water is arranged so that it passes through the inner layer and flows out from the water supply holes in the outer layer. The water supply hole and the inner layer facing it are separated from each other by at least one side, preferably by at least two pigs. Several examples of the products of the present invention will be further explained using the accompanying drawings.

FIG. 1 is a front view of a part of the tube, and shows that a coating film 3 is provided to cover small holes 2 provided in an outer layer 1.

As the material for the coating film, either a thermoplastic synthetic resin film that can be used for the outer layer A or a water permeable film that can be used for the inner layer B can be used. Normally, it is desirable to use a film made of the same material as the outer layer because it can be conveniently bonded to the outer layer by heat sealing or the like. Additionally, a water-impermeable film is usually used as the covering membrane to reliably determine the direction of water spraying.

Forming a recess in the flow path portion of the coating film or outer layer A,
It is also possible to determine the direction of watering. Furthermore, when a water-impermeable film is used as a coating membrane, it is possible to prevent soil from entering the small holes and clogging them when watering underground.

Moreover, since water can be dispersed and released from a wide area of the coating film, clogging can also be prevented in this respect. 2 is a sectional view taken along the line AA in FIG. 1, and FIG. 3 is a sectional view taken along the line BB' in FIG.

The tube has heat-sealed portions 5 formed by heat-sealing at both ends. In addition to the fin-like shape shown in the figure, the heat-sealed portion can also be formed into the shape shown in FIG. 13 by a method such as melt sealing. In these cases, it is desirable to heat seal the inner layer 6 at the same time. A liquid flow path 4 is formed between the coating film 3 and the outer layer. FIG. 4 is a perspective view of a part of the tube, in which the outer layer 1 and the coating film 3 are joined by heat sealing.

Further, the heat seal portion may be a wide area, or may be a partial area. In FIG. 4, the heat-sealed portion 7 is shown with diagonal lines. FIG. 5 shows the cross-sectional shape when liquid is injected into the tube, and by adjusting the pressure of the liquid, the cross-sectional shape as shown can be made circular.

Further, the liquid is scattered to the outside through the flow path 4. In Figure 6,
Another aspect of heat sealing the coating film 2 and the outer layer 1 is shown in a perspective view.

The coating film 2 may be provided in a continuous strip shape or may be provided only around the small hole 2 as shown in FIG. 7. In the above drawings, the coating film 3 has an outer layer 1 with a margin to provide a flow path 4.
Of course, a part of the outer layer is heat-sealed in close contact with the outer layer, and the flexibility of the outer layer or coating film when the liquid passes through the transport channel is also controlled by utilizing the elongation. The size of the passageway may be adjusted.

FIGS. 8 and 9 are front views showing other aspects of heat sealing between the coating film and the outer layer, and the flow path 4 may be formed only in a direction perpendicular to the longitudinal direction of the tube, if necessary. Instead, they can be provided in various directions, and can be branched in multiple directions.

FIGS. 10 and 11 are front views showing an example in which two rows of coating films are provided in the longitudinal direction of the tube.

FIG. 12 is a perspective view when the coating film 3 and the inner layer 6 are heat-sealed to both sides of the outer layer 1 at the same time.

The tube of the present invention is suitable as a water supply tube for irrigation and the like, and is particularly preferable for use on the ground or on the surface of the earth, but of course it may also be used underground.

[Brief explanation of the drawing]

Figures 1, 8 to 11 are partial front views of the tube, Figures 2, 3, 5, 13, 14, and 15 are sectional views of the tube, and Figure 4. , FIG. 6, FIG. 7, and FIG. 12 are partial perspective views of the tube. DESCRIPTION OF SYMBOLS 1...Outer layer, 2...Small pores, 3...Coating film, 4...
- Channel, 5... Fin-shaped heat seal portion, 6... Inner layer. Fig. 1 Fig. 2 Fig. 3 Fig. 4 Fig. 5 Fig. 6 Fig. 7 Fig. 8 Fig. 9 Fig. 10 Fig. 11 Fig. 12, Fig. 3 Fig. 14 Fig. 15

Claims (1)

[Scope of Claims] 1. A tube having an outer layer made of a water-impermeable thermoplastic synthetic resin film, the outer layer having small holes at intervals, and a coating film made of the thermoplastic synthetic resin film. is provided above the small hole so as to cover part or all of the small hole, and the coating film is bonded to the outer layer around the small hole, leaving a channel for liquid to flow out from the small hole. A bendable tube characterized by being integrated. 2. The tube according to claim 1, having at least one continuous heat-sealed portion along the length of the tube. 3. A water supply tube having an outer layer made of a water-impermeable film of thermoplastic synthetic resin having small holes for water supply at intervals, wherein a coating film that prevents water from flowing straight from the small holes is integrally formed in the outer layer. The water supply tube according to claim 1, wherein the water supply tube is joined. 4. The tube according to claim 1, comprising an outer layer A made of a water-impermeable thermoplastic synthetic resin film, and an inner layer B made of a water-permeable sheet material located inside the outer layer A.