JP3087089B2 - Drainage reinforcing material and manufacturing method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage reinforcing material used for civil engineering work and construction work.

[0002]

2. Description of the Related Art In construction works such as civil engineering and construction, for example, landslide control, flood control works, embankment works, road construction and improvement works on soft ground, coastal land reclamation land, sludge ground, etc. 2. Description of the Related Art Various surface drainage materials are used for draining and reinforcing rainwater, spring water, stored water, groundwater, and the like in the ground of a foundation or a building structure.

[0003] For example, conventionally, as a planar drainage material installed in the soil, there is a sheet material in which a cloth is fixed to a wire mesh or a perforated plastic board with an appropriate bonding material. Further, a sheet material in which a plastic board having a large number of U-shaped cross sections and a fabric are joined with an adhesive has been devised. Also, a sheet-shaped drainage material in which a spiral plastic is inserted in the middle of the thickness direction of the nonwoven fabric is known. Further, the back surface drainage material installed on the back surface of a waterproof sheet such as a tunnel, the back surface of a retaining wall, or the like is trying to increase the thickness or the porosity to secure the water flow. At this time, there is a case where a cord carpet is used in which the nonwoven fabric is needle-locked, and then the nonwoven fabric is made uneven by a fork-shaped needle.

[0004]

The sheet material in which the cloth is fixed to the above-mentioned wire mesh or various plastic boards with an appropriate joining material is bonded or mechanically used to join the different materials such as the wire mesh or the plastic board and the fabric. Fastening is required, various types of joining materials are required, and the work must be performed by human power, which increases the construction cost.

[0005] Further, the sheet material obtained by bonding the above-mentioned various plastic boards and cloth with an adhesive is liable to cause uneven settlement when used on soft ground, and the supporting force of the various plastic boards is small. The intended function may not be exerted due to inability to withstand the weight load or ground deformation of the soil to be spread and the bulldozer for construction, etc., or uneven settlement, or the like.

Further, the above code carpet has about twice the porosity as compared with a normal needle carpet, and is effective as a planar drainage material installed in soil.
When using as a drainage reinforcement using this porosity,
When buried in the soil, the unevenness of the surface of the cord carpet collapses due to earth pressure and not only reduces the porosity,
There is a drawback in that earth and sand enter between the irregularities formed so as to make it impossible to secure a predetermined cross section and water permeability.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks, and has a fineness of 3 to 30 denier as a base material .
Needle punching and / or napping
Pile 2 to 10 mm long obtained by punching
Using a cord carpet having a thickness of the carpet on the patterning side of the cord carpet, so that there is almost no settling, a skin material is attached via a water-permeable adhesive, and the base material, the water-permeable adhesive And a drainage reinforcing material integrating the three layers of the skin material. In detail, the orientation of the cord carpet as a base material is imparted in any direction to the handle, and the handle is provided on the side of the handle. Spider web, mesh nonwoven sheet,
Through the water-permeable adhesive made of fabric which is composed of a film or warp and weft having a slit or pores and drainage reinforcements bonded skin material, further, the composite of the substrate and the skin material, a hot-air Or, so as to heat and melt the water-permeable adhesive by radiant heat, a skin material is adhered to the pile portion of the base material through the water-permeable adhesive, the base material,
After laminating the three layers of the water-permeable adhesive and the skin material, the drainage reinforcing material is manufactured in a manner that is surely joined and integrated by passing through appropriate gaps and pressurizing zones so that the entire thickness is not reduced. It is intended to realize a drainage reinforcing material having water permeability and filterability, and having small settling.

According to the present invention, a nonwoven fabric, spider web or sudare-like woven type adhesive sheet is placed on or under a skin material such as polyester spunbond, and the adhesive sheet is melted with hot air or an infrared heater. While being integrated with the cord carpet supplied from above or below, immediately after passing between two rolls spaced at an appropriate interval, and by pressing, a composite drainage reinforcing material with a small thickness is reduced. Can be formed.

The fibers used for the cord carpet include:
Short fibers such as synthetic fibers such as nylon, polyester, polyethylene, polypropylene, polyvinyl chloride and acrylic are used. Nylon 66 fibers may be used to improve sag resistance.

The short fibers need to have a fineness of 3 to 30 denier, and preferably 6 to 20 denier. The fineness may be the same within this range, or short fibers of different fineness may be mixed. If the fineness is less than 3 denier, the hand feels good, but it is easy to bend. Also, since it is thin and not strong at the time of needle punching, fiber breakage occurs and fluff is likely to occur frequently. If the fineness exceeds 30 denier, the number of fibers decreases with the same basis weight,
During needle punching, slip-through is likely to occur.

The cut length of the short fiber is 40 to 100.
mm is required, and preferably, the cut length is 50 to 1
00 mm. The cut may be a fixed length cut or a variable cut. The cut length may be the same within this range, or short fibers of different fixed length cuts may be mixed. If the cut length is less than 40 mm, the ratio of the fiber ends coming out of the nonwoven fabric body during needle punching increases, and the nonwoven fabric surface becomes coarse and hard. On the other hand, if the cut length exceeds 100 mm, the feeling becomes worse, the mixing with the card becomes worse, and the operability of needle punching also deteriorates.

The basis weight of the cord carpet of the present invention is 200 to 1000 g / m ² , particularly 300 to 800 g.
/ M ² is preferred. If the basis weight is less than 200 g / m ^2, it is difficult to form a pile, and the basis weight is 1000 g / m ^2.
If it exceeds, it becomes expensive and loses its characteristics as a civil engineering material.

The pile length of the cord carpet of the present invention needs to be 2 to 10 mm. If the pile length is less than 2 mm, there is no difference in appearance from the flat carpet, and even if the skin material is adhered through the adhesive sheet, a sufficient gap cannot be secured between the cord carpet and the skin material, and water permeability and filtration are not performed. Poor nature.

The cord carpet of the present invention is produced, for example, by the following method. Short fibers having a fineness of 3 to 30 denier and a cut length of 40 to 100 mm, for example, nylon short fibers, polyester short fibers, polypropylene short fibers, acrylic short fibers or nylon 66 short fibers are mixed as raw material fibers. Thereafter, the card web is passed through the card, the card web is laminated to a required basis weight, and punching is performed to obtain a flat needle punch sheet.

The needle used for needle punching is preferably a barb needle, a crown needle, or the like. The fibers are tightly entangled by these needles. The number of punches at this time is about 30 to 300 times / cm ² , which is appropriately selected according to the application. The needle depth is preferably 5 to 20 mm, particularly preferably 10 to 15 mm.

Next, the flat needle punch sheet is napped to obtain a napped carpet. It is preferable to use a fork needle as the needle used for the napped punching.
The fibers protrude from the surface of the carpet and are raised by the fork needle.

When using a needle punching machine in which the fork needles are spaced at a predetermined interval, the fibers can protrude in the form of ridges from the surface of the carpet and can be raised.

As described above, instead of the flat needle punch sheet being napped and punched into a napped carpet,
By using a needle punching machine equipped with a needle plate in which long fork needles and short fork needles are alternately arranged, the fibers are densely entangled and the long fork needles cause the fibers to protrude from the carpet surface in a ridge shape. Can be raised.

The nonwoven fabric, spider web or sudare adhesive sheet used as the water-permeable adhesive is made of filaments made of polyester, polyamide, polyacrylonitrile, polyvinyl alcohol, polyvinyl chloride, polyethylene, or the like. Anything can be used. Particularly, those made of polyester are preferable. The filament or staple has a diameter of about 1 to 30 d, and preferably 3 to 10 denier. This adhesive sheet is produced by a long fiber nonwoven fabric manufacturing method according to the spun bond method. The basis weight of the nonwoven is 1
0-100 g / m < ² >, especially 10-50 g / m < ² > is suitable.

The interdigital sheet used as the water-permeable adhesive is made of modified nylon, ethylene-vinyl acetate copolymer (E
A split sheet obtained by splitting a film made of VA) can be used. Further, as the polyamide film, 6-nylon, 6,6-nylon, 6,10-nylon, 11-nylon, 12-nylon, copolymerized amide of two or more of these nylon monomers, or two types of the above nylon Mixtures of the above can be used. It may be an ethylene-vinyl acetate copolymer or a saponified product thereof. Ethylene content is 20-60%, preferably 30-40%
Those having a degree of saponification of 50 to 100% may be used.
Further, films of various thermoplastic materials such as polyester, polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyvinylidene chloride, and copolymers thereof can be used as appropriate.

The water-permeable adhesive interdigital sheet is, for example,
A split sheet obtained by splitting a film made of an ethylene-vinyl acetate copolymer (EVA) is used. That is, EVA is extruded from a T-die type extruder to produce a 300-700 μm thick film made of EVA, stretched 3 to 5 times at a temperature of 70 to 120 ° C. by a stretching machine, and a rubbing blade passed through a guide roller. The film is then sent to a combing roll having a perforation in the width direction of the film, and is expanded in the width direction to form a split sheet.

A modified nylon may be used instead of the EVA film. Further, the combing roll may use a blade provided in an inclined manner with respect to the entire width of the film.

The non-woven fabric used as the skin material may be a filament or staple made of polyester, polyamide, polyacrylonitrile, polyvinyl alcohol, polyvinyl chloride, polyethylene, or the like. Particularly, those made of polyester are preferable.
The filament or staple has a denier of about 1 to 30 denier, and particularly preferably has a denier of 3 to 10 denier. These fibers are entangled and integrated by a needle punch method or a water jet entanglement method, or by a long fiber nonwoven fabric manufacturing method by a spun bond method. The basis weight of the nonwoven fabric is 20 to 500 g / m ² , particularly 50 to 200 g / m ^2.
Is preferred.

Next, as shown in FIG. 1, a water-permeable adhesive sheet 2 is placed on the skin material 1 and
From above, the hot air of 160 to 200 ° C. is injected through the outlet 3 to melt the water-permeable adhesive sheet 2 while being integrated with the code carpet 4 supplied from above the water-permeable adhesive sheet 2 and immediately thereafter, It is allowed to pass between two rolls 5 and 5 at a feed rate of 10 to 20 m / min,
The skin material 1 and the code carpet 4 are pressed and then wound up on a winding roll 7.

As shown in FIG. 2, the water-permeable adhesive sheet 2 is placed under the skin material 1, and the cord carpet 4 is supplied from below the water-permeable adhesive sheet 2 to move around the first roll 5-1. 160-200 ° C infrared heater 6 while being wound
Melts the water-permeable adhesive sheet 2 by the first roll 5-
The skin material 1 and the cord carpet 4 may be pressed and passed through the space between the first roll 2 and the second roll 5-2, and may be wound around the winding roll 7.

[0026]

Since the present invention is constructed as described above, by bonding the surface projection formed by the pile on the patterning side of the cord carpet and the skin material, the collapse of unevenness is small and a void is formed. Water permeability is ensured, and the skin material acts as a filtering material to prevent the intrusion of earth and sand into the voids formed by the unevenness, so that it has filterability and is made of a fiber material as a whole, so that it also has flexibility. Have.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below, but the present invention is not limited by the embodiments. Example-1 As a cord carpet, a nylon short fiber having a fineness of 10 denier and a cut length of 51 mm was passed through a card. Punching the obtained card web (needle type: barb needle, depth 1
2 mm, 100 times / cm ² ) to obtain a flat needle punch sheet.

Next, the flat needle punch sheet is punched by using a needle punching machine in which fork needles are spaced apart from each other at a predetermined interval, and the pile height is 3 m.
m, a ridged raised carpet having a basis weight of 350 g / m ² was obtained.

As the interdigital sheet used as the water-permeable adhesive, a split sheet obtained by splitting a film made of ethylene-vinyl acetate copolymer (EVA) was used. That is, EVA is extruded from a T-die type extruder, and EVA is extruded.
A 500 μm thick film made of VA is manufactured, stretched 3 times at a temperature of 100 ° C. by a stretching machine, sent to a combing roll having a rubbing blade via a guide roller, and perforated in the width direction of the film. The sheet was expanded to obtain a split sheet.

As the skin material, a polyester spunbonded nonwoven fabric having a fineness of 3 denier was used. The basis weight of the nonwoven fabric is 9
0 g / m ² .

Next, a water-permeable adhesive sheet is placed on the skin material, and hot air of 160 ° C. is blown from above the water-permeable adhesive sheet to melt the water-permeable adhesive sheet while the water-permeable adhesive sheet is melted. And then passed immediately between two rolls at an appropriate distance from each other, and the skin material and the code carpet were pressed and wound on a take-up roll.

Example 2 As a cord carpet, fineness 5 denier, cut length 6
A 0 mm polyester short fiber was passed through the card. The obtained card web was punched (needle type: barb needle, depth 10 mm, number of times 100 / cm ² ) to obtain a flat needle punch sheet.

Next, the flat needle punch sheet is punched by using a needle punching machine in which fork needles are spaced at predetermined intervals, and the pile height is 5 mm.
A ridged carpet having a basis weight of 400 g / m ² was obtained.

As the water-permeable adhesive, a polyester spider web-shaped nonwoven fabric sheet of about 8 denier was used. The fibers were produced by a long-fiber nonwoven fabric manufacturing method according to the spun bond method. The basis weight of the nonwoven fabric was 10 g / m ² .

As the skin material, a polyester spunbonded nonwoven fabric having a fineness of 3 denier was used. The basis weight of the nonwoven fabric is 1
It was 30 g / m ² .

As shown in FIG. 2, the water-permeable adhesive sheet 2 is placed under the skin material 1, and the cord carpet 4 is supplied from below the water-permeable adhesive sheet 2 to move around the first roll 5-1. The water-permeable adhesive sheet 2 is melted by the infrared heater 6 at 200 ° C. while being wound, and the first roll 5-1 and the second roll 5-1 are melted.
After passing between the roll 5-2, the skin material 1 and the cord carpet 4 were pressed and wound around the winding roll 7.

Comparative Example 1 A cord carpet was obtained under the same conditions as in Example 1.

Comparative Example 2 A cord carpet was obtained under the same conditions as in Example 2.

A water passage test was performed on the samples obtained in Example 1, Example 2, Comparative Example 1, and Comparative Example 2. Table 1 shows the results of the water flow test. However, the thickness and the water permeability (indicated by * in Table 1) of Comparative Example-1 and Comparative Example-2 were measured using sand 8 that passed through a 20-mesh standard sieve through the valley of the cord carpet 4 as shown in FIG. This is a value measured in a filled state.

As shown in Table 1, in the comparative example, since sand is present, even if a restraining pressure is applied, the thickness is small, but the water permeability is small even when a constraining pressure is applied. As a result, the water flow rate (V) most necessary as the drainage material is reduced. The water flow rate (V) is represented by the product of the water permeability (K), the water conveyance gradient (i), and the water cross section (A) (V = KiA).

Construction Example 1 FIG. 4 shows a situation where embankment 12 is constructed on drainage reinforcing material 11 of the present invention laid on soft ground 10. It not only ensures the trafficability (workability) of the construction machine 13 but also exerts a filtering function of preventing fine particles from the soft ground 10 from entering into the high-quality soil, and from the soft ground. The surplus water, rainwater, and the like that come out are drained in the horizontal direction and collected in the perforated drain pipe 14.

Construction Example 2 FIG. 5 shows an example of use in embankment. The drainage reinforcing material 21 of the present invention is laid on the foundation surface of the embankment, or the drainage reinforcing material 2 is
When 0 is used, the downstream ends of the drainage reinforcing members 20 and 21 are connected to drainage materials having a drainage capacity of a required flow rate, such as a U-shaped groove 23 and a blind conduit 24. In addition, when used for draining and reinforcing the slope portion 22, the edge portion is used by being lowered by about 10 cm along the slope.

FIG. 6 is a detailed view of how the drainage reinforcing member 21 of the present invention is placed around the perforated drainage pipe 24. Surrounding the drainage reinforcing material 21 of the present invention around the perforated drainage pipe 24,
The ends of the reinforcing material are fixed with a wire, glued with an adhesive, or sewn. The drainage that seeps into the slope and the drainage that flows down the slope is infiltrated into the drainage reinforcing member 21, passes through, and is collected in the perforated drainage pipe 24.

FIG. 7 shows the pipe 2 at the end of the drain pipe 24.
4 shows a specific example of prevention of sediment inflow into the inside of the vehicle. The drainage reinforcing member 21 of the present invention is surrounded and closed at the end of the drainage pipe 24, and the end of the drainage reinforcing member 21 around the end of the drainage pipe 24 is wound around with a line 26, and the drainage reinforcing member 2 is wound around the drainage pipe 24.
Fix one end. When the drainage pipe 24 is buried in the soil, it acts as a filter for preventing earth and sand from entering the gap between the cord carpet of the drainage reinforcing material 21 and the skin material. The inflow of earth and sand into the interior can be prevented.

Construction Example 3 FIG. 8 shows an example in which the drainage reinforcing material 31 of the present invention is used as a filtering material for the blind culvert 30. When embankment is laid on the soft ground 32, a culvert filled with a filter material in the original ground, that is, a blind culvert 30, is often installed. However, sediment adjacent to the blind culvert may become sludge.

In such a case, a filter material 33 such as gravel that satisfies a predetermined quality as a filter layer is cut into the excavation groove 3.
If it is put into the container as it is, the sludge may be mixed into the filter material and the desired function as the filter layer may not be exhibited. In such a case, it is necessary to prevent the filter material from penetrating into the original ground.

Further, irrespective of the soil properties of the embankment foundation, it is difficult to obtain a material suitable for the filter material of the culvert 30 or an inappropriate material must be used as the filter material for economic reasons. There is also. FIG. 8 shows an example of use in which the filter material 33 is wrapped by the drainage reinforcing material 31, and the filtering function of the drainage reinforcing material 31 prevents the sludge from being mixed in and prevents the filter material 33 from sinking.

Further, since the drainage reinforcing member 31 can prevent unevenness of the blind culvert by its reinforcing function, continuity of the drainage filter layer can be secured as an additional function.

Working Example 4 The present invention can also be used as a cushioning material on the back surface of a tunnel waterproof sheet. FIG. 9 shows the structure of a tunnel and a waterproofing system, that is, a construction position of a waterproofing work 42, and FIG. 10 is an enlarged view of the waterproofing work (waterproofing sheet + backside cushioning material). Here is an example using.

As shown in FIG. 9, the tunnel 40 is constructed by placing an inner ring lining concrete 43 on the inner surface of an outer ring lining concrete 41 with a waterproofing 42 interposed therebetween. A roadbed concrete 44 is cast on the lower peripheral surface, and the upper surface thereof is a roadbed surface 45.

As shown in FIG. 10, the waterproofing member 42 is composed of a waterproof sheet 46 and a back cushioning material 47.
Is used as the drainage reinforcing material of the present invention. Since the drainage reinforcing material of the present invention has a cushioning property in addition to the drainage reinforcing function, it protects the water-impervious sheet 46 from the protrusions existing on the outer ring lining concrete 41 and at the time of placing the inner ring lining concrete 43. In addition, the effect of absorbing the impact force acting on the water-blocking sheet 46 and the structure of the inner ring lining and the outer ring lining are structurally separated to sufficiently fulfill the function of separating cracks generated in concrete. In addition, it also has a function of draining permeated water collected on the impermeable sheet 46 in the vertical and transverse directions. And
Utilizing this function, it is also used as a drain material for underground structures including buildings.

Working Example 5 Since the drainage reinforcing material of the present invention has cushioning properties and directionality of voids, it can also be used as a protective material, a drainage material, and an air vent for a waterproof sheet used in a pond or a waste disposal site. used. FIG. 11 shows a specific usage example.

That is, the drainage reinforcing material 53 of the present invention is laminated on the soft ground 50 such as a pond or the like and on the embankment 51 connected to the back of a waterproof sheet 52 made of rubber or vinyl chloride sheet. As a result, protection of the water-impervious sheet 52 from unevenness existing on the soft bottom 50 and the embankment 51,
It acts as a buffer.

Construction Example 6 FIG. 12 shows a case where the drainage reinforcing material 60 of the present invention is used under a sand mat 61 and a thin sand mat layer or a sand mat material having poor water permeability is laid to have a predetermined water permeability. This is an example. The construction method is the same as that used on soft ground,
In order to further enhance the drainage function, a method of laying a sand layer (sand mat) having a thickness of 50 cm or 1 m is well known.

However, in recent years, in many cases, good quality sand is not sufficiently obtained. Therefore, only a geotextile drainage material is used, or a sand mat and a geotextile drainage material are used in combination.
Various measures have been taken to use a sand mat having poor water permeability or to reduce the thickness of the sand mat. The drainage reinforcing material 60 shown in FIG. 12 is used below the sand mat 61 so that a thin sand mat layer has a predetermined water permeability.

In this example, the drainage reinforcing material 60 and the sand mat layer 61 are laid directly on the soft ground 62, but the drainage reinforcing material 60 is laid inside the sand mat layer, Need not be used. The feature of this construction method is that the drainage reinforcing material of the present invention has a filtering function, so that fine particles can be prevented from entering the sand mat layer from the embankment or soft ground, so that the horizontal direction necessary for the drainage layer is required. The ability to maintain the water permeability for a long period of time.

Construction Example 7 Other use examples include vertical drain materials, concrete curing mats, backwater drainage materials for retaining walls, bunker bottom drainage and fairway drainage at golf courses, and sludge pool drainage promotion materials. Can be.

[0058]

As described above, according to the present invention, the gaps of the cord carpet are retained even after the cord carpet is used in the soil by bonding and fixing the convex portion of the surface pile of the cord carpet and the skin material. It can provide full water permeability and has little sag in the soil. In addition, the skin material has a filtering performance for preventing earth and sand from entering the voids, and the horizontal (in-plane) water flow performance required as a function of the drainage material is hardly reduced for a long time. ing. And since it is made entirely of a fiber material, it has flexibility, has a buffering effect, and can be laid at a construction site, and does not break down.

Therefore, the base surface of the embankment and the separation of small steps
It is used as a drainage material, a drainage reinforcement material on slopes, and a separation / drainage / reinforcement material under the soil cover of soft ground surface treatment works. It is. Also, even when used on roads, the load is dispersed,
Even when used for drainage materials such as groundwater and revetments for rivers and seas, it has a suction prevention function in addition to the drainage function. In addition, it can be widely used as a building material such as a waterproof sheet, a waterproof sheet protective material, a drainage material such as a tunnel, a heat insulating material, a curing sheet and the like.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a process for producing a drainage reinforcing material of the present invention.

FIG. 2 is a schematic view showing another manufacturing process of the drainage reinforcing material of the present invention.

FIG. 3 is a sectional view of a drainage reinforcing material used in a water flow test according to the present invention.

FIG. 4 is a schematic view showing a construction example in which the drainage reinforcing material of the present invention is laid on soft ground.

FIG. 5 is a schematic view showing a construction example in which the drainage reinforcing material of the present invention is laid on a foundation surface, inside, and a slope of an embankment.

FIG. 6 is a cross-sectional view showing a construction example in which the drainage reinforcing material of the present invention is used around a perforated drainage pipe.

FIG. 7 is a cross-sectional view showing a construction example in which the drainage reinforcing material of the present invention is used at an end of a drainage pipe.

FIG. 8 is a cross-sectional view showing a construction example in which the drainage reinforcing material of the present invention is used for a blind culvert.

FIG. 9 is a sectional view of a waterproofing work for a tunnel.

FIG. 10 is a partially enlarged sectional view of a tunnel and a waterproofing work.

FIG. 11 is a sectional view showing a construction example in which the drainage reinforcing material of the present invention is used at the bottom of a pond.

FIG. 12 is a cross-sectional view showing a construction example using the drainage reinforcing material of the present invention under a sand mat.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Skin material 2 Adhesive material 3 Hot air outlet 4 Code carpet 5 Crimping roll 6 Infrared heater 7 Winding roll

[Table 1]

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yutaka Nagano 2-33-7-3 Hashigadai, Narita-shi, Chiba (72) Inventor Seiichi Nitta 8-84 Takashimadaira, Itabashi-ku, Tokyo Takeyama Mansion 502 (72) Inventor Hideo Hayashi 306-125, Oaza, Iruma-shi, Saitama (72) Inventor Masao Miyagawa 166-4 Kawabe, Ritsuto-cho, Kurita-gun, Shiga Prefecture (56) References JP-A-60-258319 (JP, A) JP-A-63-112762 (JP, A) JP-A-51-18130 (JP, A) JP-A-57-22535 (JP, U) JP-A-56-171825 (JP, U) JP-A-49-72007 (JP, U) JP-A-2-42931 (JP, U) JP-A-61-130603 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02D 3/00 102 E02D 3 / 10 E02D 17/20 106

Claims (6)

(57) [Claims] 1. A short fiber having a fineness of 3 to 30 denier as a substrate.
Made of fiber, needle punching and / or nap punch
With a pile of 2 to 10 mm length obtained by
Using a cord carpet, a skin material is adhered to the patterned side of the cord carpet through a water-permeable adhesive so that the carpet has almost no settling.
A drainage reinforcing material that integrates three layers of a water-permeable adhesive and a skin material. 2. The pattern of a cord carpet as a base material,
The drainage reinforcing material according to claim 1, wherein orientation is given in any direction. 3. The drainage reinforcing material according to claim 1, wherein the water-permeable adhesive comprises a web-like or mesh-like nonwoven sheet. 4. The drainage reinforcing material according to claim 1, wherein the water-permeable adhesive comprises a film having slits or pores. 5. The drainage reinforcing material according to claim 1, wherein the water-permeable adhesive is a woven fabric composed of warps and wefts. 6. A short fiber having a fineness of 3 to 30 denier.
By needle punching and / or nap punching
Having a pile of 2 to 10 mm length obtained by
In the composite base material and a skin material using the carpet, with allowed to heat melt the water-permeable adhesive with hot air or radiant heat, the skin material of the base material through the permeable adhesive pi
The base material, the water-permeable adhesive and the skin material.
A method for producing a drainage reinforcing material joined and integrated by passing through appropriate gaps and pressurizing zones so that the entire thickness is not reduced after laminating the layers.