JP6062978B2 - Drainage mat - Google Patents

Description

  The present invention relates to a drainage mat in which a pile protrudes from a surface material.

  Conventionally, a drainage mat in which a pile protrudes from an outer surface is known (see, for example, Patent Document 1). These drainage mats are configured to scrape off water and dirt on the shoe soles that have stepped on the drainage mats by the brushing effect of the pile.

JP 2012-223476 A

  However, in the case of the conventional drainage mat, since no consideration is given to the water droplets scraped off by the pile, it is conceivable that the water droplets accumulate on the drainage mat. If the drainage mat in a state where water droplets are accumulated is stepped on, the waterdrops on the drainage mat adhere to the back of the shoe, and if the shoe enters the room as it is, there is a problem that the indoor floor is wetted.

  This invention is made | formed in view of this point, The objective is to aim at the improvement of the drainage property of the drainage mat which made the pile protrude.

  The present invention is based on a drain mat. The drainage mat is composed of a front knitted fabric (21) and a back knitted fabric (22), a pile (40) protruding from the front knitted fabric (21), and a water-impermeable layer laminated on the back knitted fabric (22). A mat body (10) having a sheet member (30) and a connecting thread (23) connecting the front knitted fabric (21) and the back knitted fabric (22), 23) A clearance between the back knitted fabric (22) and the sheet member (30) through which the gap between 23 constitutes a discharge passage (24) for fluid that has entered from the front knitted fabric (21) ( 31) is provided.

  In the drainage mat of the present invention, it is preferable that at least one of the front knitted fabric (21) and the back knitted fabric (22) contains a core-sheath composite fiber. This core-sheath type composite fiber has a lower melting point in the sheath part than in the core part. The core-sheath type composite fiber includes a sheath made of a low-melting-point polymer having a melting point lower than that of the core portion, and a plain yarn covered with a low-melting point yarn (those having a lower melting point than ordinary yarn). Here, a fiber having a melting point of the outer peripheral portion lower than that of the central portion may be used.

  In the drainage mat of the present invention, the amount of water dripped onto the mat body (10) is W [cc], and the mat body including water before and after the water is dripped onto the mat body (10). When the weight increase amount of 10) is ΔW [g], it is preferable that the relationship of 0.4 ≦ (1−ΔW / W) ≦ 0.9 is satisfied.

  In the drainage mat of the present invention, the number of filaments per strain of the pile (40) is preferably 4 or more and 30 or less, and the single yarn fineness is preferably 200 dtex or more and 800 dtex or less. Here, one strain of pile (40) refers to one group in which the roots of a plurality of filaments are bundled. FIG. 1 illustrates six piles (40).

  Further, in the drainage mat of the present invention, a fabric (27) made of a woven fabric or a nonwoven fabric is arranged in the lower layer portion of the back knitted fabric (22), and the pile (40) has a root portion of the fabric (27) and the fabric. It is preferable to be fixed by the sheet member (30).

  In the drainage mat of the present invention, the mat body (10) includes an outer peripheral wall (50) at an outer edge, and the outer peripheral wall (50) extends from the front knitted fabric (21) to the back knitted fabric (22). It is preferable to have an inclined surface (58) extending outward from the mat body (10) as it goes in the direction, and the inclination angle of the inclined surface (58) is 15 ° or more with respect to the bottom surface of the sheet member (30). It is preferably 60 ° or less.

  In the drainage mat of the present invention, the outer peripheral wall (50) is preferably a tape in a bent state.

  In the drainage mat of the present invention, the outer peripheral wall (50) includes a fin (55) extending outward from the mat main body (10) from a bent portion of the tape, and the mat main body (10) is placed on the ground. It is preferable that the fin (55) is in contact with the ground.

  In the drainage mat of the present invention, it is preferable that a backing material (26) is laminated between the backing knitted fabric (22) and the sheet member (30).

  According to the present invention, since the front knitted fabric and the back knitted fabric are connected by the connecting yarn, a gap in the thickness direction is formed between the front knitted fabric and the back knitted fabric, and this gap is discharged. It can be used as a flow path. The water droplets scraped by the pile of the drainage mat flow into the discharge channel and the through hole after passing through the gap of the surface knitted fabric, and use, for example, the gradient of the dog running (inclined surface) outside the store entrance. However, it is discharged to the outside of the drainage mat through the discharge channel and the through hole. Thereby, the drainage property of the drainage mat from which the pile is projected can be improved.

FIG. 1 is a longitudinal sectional view of a drainage mat according to an embodiment of the present invention. FIG. 2 is a plan view of a drainage mat according to an embodiment of the present invention. FIG. 3 is an enlarged cross-sectional view of the vicinity of the drain mat mat. FIG. 4 is an enlarged cross-sectional view of the vicinity of a finned tape of a drainage mat according to a modification of the embodiment. FIG. 5 is an organization chart of the double raschel of Example 1. FIG. 6 is an organization chart of the double raschel in Example 5. FIG. 7 is a schematic view of a drain mat backing.

  Hereinafter, a drain mat (1) according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that one embodiment described below is an exemplification, and the present invention is not limited to one embodiment.

  The drain mat (1) of one embodiment is installed at the entrance of a store, for example. As shown in FIG. 1, the mat body (10) of the drain mat (1) includes a double raschel (20), a pile (40), a rubber sheet (30) as a sheet member, and a nonwoven fabric ( 27) and backing material (26). As shown in FIG. 2, the mat body (10) includes a tape (50) as an outer peripheral wall at an outer edge portion thereof. The mat body (10) has a through hole (31).

(Double Russell)
The double raschel (20) includes a front knitted fabric (21), a back knitted fabric (22), and a connecting yarn (23). The double russell (20) has a three-dimensional shape in which a front knitted fabric (21) and a back knitted fabric (22) are connected in the thickness direction with a connecting yarn (23).

  The front knitted fabric (21) and the back knitted fabric (22) are formed by Russell knitting multifilaments of 150 to 1500 dtex. By making the knitting yarns of the front knitted fabric (21) and the back knitted fabric (22) into multifilaments, the knitting property can be improved. Further, the surface knitted fabric (21) is preferably a mesh-shaped honeycomb knitting in which a hexagonal opening is formed, and the water droplets scraped off easily flow into the double raschel (20) from the gap of the honeycomb knitting. More preferably, by changing the entanglement between the yarns of the honeycomb knitting from a plurality of times to once, the shape of the mesh hole of the honeycomb knitting of the surface knitted fabric (21) is changed from a hexagon to a rhombus, and the stitches in the vertical direction are Therefore, the weaving load on the tuft is reduced, the productivity is improved, and the appearance of raising the tuft is also improved. The knitted fabric (22) preferably has a flat structure. By increasing the surface area of the knitted fabric (22), it is possible to prevent the backing material (26) or rubber sheet (30) from entering the double raschel (20) during production. And contributes to securing a void in the double raschel (20).

  When the fineness of the multifilament is greater than 1500 dtex, the knitting property is deteriorated and the gap in the surface knitted fabric (21) is reduced, so that the water droplets scraped off by the pile (40) enter the double raschel (20). Impedes intrusion and reduces the drainage of the mat body (10). On the other hand, when it becomes less than 150 dtex, the strength of the double russell (20) decreases. Furthermore, the surface area of the knitted fabric (22) is reduced, and during production, the backing material (26) or rubber sheet (30) penetrates into the double raschel (20) and solidifies in a state where the double raschel (20) is crushed. As a result, the void in the double raschel (20) cannot be secured, and the drainage of the mat body (10) is deteriorated.

  From this, the fineness of the fiber used for the Russell fabric (surface knitted fabric (21) and back knitted fabric (22)) is preferably 150 to 1500 dtex, and more preferably 300 dtex to 900 dtex.

  Synthetic fibers such as polyethylene terephthalate fibers, polytrimethylene terephthalate fibers, polybutylene terephthalate fibers, polyamide fibers, and polypropylene fibers are preferable as the fibers used in the ground structure (the front knitted fabric (21) and the back knitted fabric (22)). Used.

  Each structure of the front knitted fabric (21) and the back knitted fabric (22) has a warp density of 6 to 18 wales / inch, preferably 8 to 12 wales / inch. If the warp density is greater than 18 wales / inch, the gap between the honeycomb knitted fabrics of the front knitted fabric (21) becomes small. This is not preferable because the surface area becomes small. The latitude density is 8 to 20 course / inch, preferably 10 to 14 course / inch. When the weft density is greater than 20 courses / inch, the gap in the honeycomb knitted fabric of the front knitted fabric (21) becomes small, which is not preferable. When the weft density is less than 8 courses / inch, the flat knitted fabric (22) has a flat structure. A surface area becomes small and is not preferable.

  In addition, the water droplets on the shoe sole scraped off by the pile (40) of the mat body (10) through the mesh holes of the honeycomb knitted fabric of the front knitted fabric (21) are inside the double raschel (20) (the front knitted fabric (21 ) And the back knitted fabric (22). Further, the pile (40) of the mat body (10) projects outward from the surface knitted fabric (21).

  Here, when the opening area of the mesh hole of the honeycomb knitted fabric of the surface knitted fabric (21) is larger than 4.0 cm 2 / piece, the strength of the surface knitted fabric (21) is lowered and smaller than 0.1 cm 2 / piece. Then, it becomes difficult for water droplets to pass through and the drainage of the mat body (10) decreases. Therefore, the opening area of the mesh holes of the honeycomb knitted fabric of the surface knitted fabric (21) is preferably 0.1 to 4.0 cm 2 / piece, more preferably 0.4 to 2.0 cm 2 / piece.

  The structure of the surface knitted fabric (21) is the honeycomb knitting as described above. By so doing, for example, the strength of the surface knitted fabric (21) can be increased compared to the lattice shape, and the durability of the mat body (10) can be improved. It should be noted that only the structure of the front knitted fabric (21) is not limited to the honeycomb knitting, and both the front knitted fabric (21) and the back knitted fabric (22) may be the honeycomb knitted.

  Further, when the respective structures of the front knitted fabric (21) and the back knitted fabric (22) are compared, the front knitted fabric (21) is rough and the back knitted fabric (22) is dense. The reason for roughening the surface knitted fabric (21) is to facilitate tufting of the pile (40) to the front side of the double raschel (20). The structure of the back knitted fabric (22) was made dense when the rubber sheet (30) was backed to the back side of the double raschel (20). This is to prevent stains from the back knitted fabric (22).

  Of the front knitted fabric (21) and the back knitted fabric (22), only the back knitted fabric (22) contains the core-sheath type composite fiber. The core-sheath type composite fiber is configured such that the melting point of the sheath part is lower than the melting point of the core part. Here, due to the heat treatment of the double raschel (20), adjacent core-sheath-type conjugate fibers are fused together. At this time, the surface area of the fiber after fusion is smaller than the total surface area of the plurality of fibers before fusion. Since the water droplets on the drain mat (1) are held by the surface tension of the fibers, the amount of water droplets held on the fibers can be reduced by reducing the surface area of the fibers. Can be improved. Moreover, the dimensional stability of the double raschel (20) can be improved by heat-treating the double raschel (20).

  Here, it is preferable that the back knitted fabric (22) contains 50% or more of the core-sheath type composite fiber. The melting point of the sheath part of the core-sheath composite fiber is preferably 20 ° C. or lower than the melting point of the core part. The heat treatment temperature is preferably not less than the melting point of the sheath part of the core-sheath type composite fiber and less than the melting point of the core part, more preferably 130 ° C. or more and 190 ° C. or less.

  Further, the front knitted fabric (21) is composed of a coarser knitted fabric than the back knitted fabric (22). By making the front knitted fabric (21) rougher than the back knitted fabric (22), the pile (40) tufted to the double raschel (20) Can be made to protrude from the surface knitted fabric (21).

  The connecting yarn (23) of the double raschel (20) connects the front knitted fabric (21) and the back knitted fabric (22) in the thickness direction. A gap between the connecting yarn (23) and the connecting yarn (23) constitutes a discharge channel (24). The discharge channel (24) communicates with the mesh hole and the through hole (31) of the honeycomb knitted fabric of the surface knitted fabric (21).

  The material of the connecting yarn (23) is preferably a monofilament. By making the monofilament with high bending rigidity, the drainage mat (1) has excellent resilience to compression, so a void is secured in the double raschel (20), which is a drainage groove, and the drainage performance of the drainage mat (1) is improved. To do.

  If the fineness of the connecting thread (23) is greater than 1000 dtex, the cushion of the mat body (10) is too strong and the stepping comfort becomes worse, and if it is less than 200 dtex, the cushion of the mat body (10) is too weak. Thus, when the mat body (10) is stepped on, the drainage passage is crushed and the mat body (10) drainage is reduced. Further, if the cushion of the mat body (10) is weak, the shoe back comes into contact with the back knitted fabric (22), and water drops of the back knitted fabric (22) adhere to the shoe back, which is not preferable. For this reason, the connecting yarn (23) of the double raschel (20) is preferably 200 to 1000 dtex, and more preferably 400 to 800 dtex.

  As the material for the connecting yarn (23), synthetic fibers such as polyethylene terephthalate fiber, polytrimethylene terephthalate fiber, polybutylene terephthalate fiber, polyamide fiber, and polypropylene fiber are preferably used.

(pile)
The pile (40) of the mat body (10) has a tip end portion protruding from a mesh hole of the honeycomb knitted fabric of the surface knitted fabric (21). Further, as described above, the pile (40) protrudes through between the knitting yarns at the node portions of the front knitted fabric (21). The pile (40) is tufted to the back knitted fabric (22) of the double raschel (20). In one embodiment, the nonwoven fabric (27) and the rubber sheet (30) are laminated on the back surface (the surface opposite to the pile surface) of the back knitted fabric (22). By doing so, the root of the pile (40) is firmly fixed by the nonwoven fabric (27) and the rubber sheet (30).

  The pile (40) is in contact with the connecting yarn (23) of the double raschel (20) at the portion between the front knitted fabric (21) and the back knitted fabric (22). The pile (40) is supported by the connecting yarn (23) by this portion coming into contact with the connecting yarn (23). Thereby, the raising property of a pile (40) can be improved.

  When the total fineness of the pile (40) is larger than 10,000 dtex, the weaving property is deteriorated, and when it is smaller than 800 dtex, the mat body (10) is not easily scraped and the appearance is also reduced. It is not preferable to see through the ground. From the above, the pile (40) is preferably 800 to 10000 dtex, and more preferably 3000 to 7000 dtex.

  In addition, the pile (40) is a cocoon filament having a single yarn fineness of 200 dtex or more and 800 dtex or less and a filament number of 4 or more and 30 or less per strain in consideration of the scratching and settling resistance of the shoe sole. It is preferable.

  As a material for the pile (40), polyamide fiber, polyethylene terephthalate fiber, polytrimethylene terephthalate fiber, polypropylene fiber and the like are preferable. From the viewpoint of improving the drainage performance of the drainage mat (1) without absorbing water, a filament is preferred, and in particular, 24 or less soot filaments are preferred.

  The embodiment of the pile (40) preferably has crimps from the viewpoint of preventing see-through and buckling durability of the pile (40).

  The pile (40) is preferably water-repellent. By doing so, the water droplets on the shoe sole scraped by the pile (40) can be quickly dropped. Further, the surface of the mat body (10) can be further improved even on rainy days by the water repellent processing of the pile (40).

(Nonwoven fabric)
The nonwoven fabric (27) covers the back surface of the back knitted fabric (22) to which the pile (40) is tufted. The nonwoven fabric (27) covers the back side of the back knitted fabric (22), so that the pile (40) does not fall out of the back knitted fabric (22).

(Rubber sheet)
The rubber sheet (30) is made of styrene / butadiene copolymer, acrylonitrile / butadiene copolymer, ethylene / vinyl acetate copolymer, ethylene / ethyl acrylate copolymer to give the drainage mat (1) a non-slip effect. A polymer or an ethylene / propylene copolymer is preferably used. The mat body (10) is provided with a through hole (31) penetrating the mat body (10). The through hole (31) extends from the back knitted fabric (22) to the rubber sheet (30). It may penetrate. The rubber sheet (30) is fixed to the back side of the back knitted fabric (22) of the double raschel (20) through the nonwoven fabric (27) and the backing material (26). For example, when the mat body (10) is installed at the store entrance, the water droplets scraped off by the pile (40) of the mat body (10) are caused by the gradient of the dog running (inclined surface) provided at the store entrance, It is discharged from the through hole (31) of the mat body (10) through the discharge channel (24) in the double raschel (20). The through holes (31) are preferably arranged in a staggered manner on the entire surface of the mat body (10). In normal concrete floors, since the surface is uneven, the water that has entered the through-holes escapes through the gap, but in the mirror floor, there is a concern that it will be difficult to come off due to close contact with the rubber sheet. Grooves or irregularities can be provided.

(Lining material)
The backing material (26) is provided between the nonwoven fabric (27) and the rubber sheet (30). The backing material (26) has the aim of improving the thread removal strength, preventing flare of the drainage mat (1), and dimensional stability. The material of the backing material (26) is made of a thermoplastic resin. Thermoplastic resins are ethylene / vinyl acetate copolymer, ethylene / ethyl acrylate copolymer, ethylene / propylene copolymer, styrene / butadiene copolymer, styrene / isoprene copolymer, acrylonitrile from the viewpoint of thermal adhesion. -It preferably contains at least one of a butadiene copolymer, chloroprene, butadiene, and polyisobutylene.

(tape)
As described above, the mat body (10) is provided with an outer peripheral wall over the entire circumference of the outer edge portion (see FIG. 2). The outer peripheral wall is composed of a tape (50) from the viewpoint of strength reinforcement and design at the end of the drainage mat (1). As shown in FIG. 3, the tape (50) is bent at its intermediate portion (52) in the width direction, and one (54) of both sides sandwiching the intermediate portion (52) in the width direction is the rubber sheet (30). It is fixed to the bottom surface with a sewing thread (59), and the other (53) is fixed to the top surface of the surface knitted fabric (21) of the double raschel (20) with a sewing thread (59). The method of sewing the tape (50) to the mat body (10) with a sewing machine is an example. A fixing method other than the sewing thread (59) may be used as long as the double raschel (20) and the tape (50) can be fixed. The tape (50) is configured such that the other side (53) of the both side portions forms an inclined surface (58) on the outer edge of the mat body (10) by obliquely crushing the outer edge of the double raschel (20). Yes. The inclined surface (58) extends inward of the mat body (10) from the lower surface to the upper surface of the mat body (10).

  This inclined surface (58) can blow up the wind blown from the side of the drainage mat (1) in an oblique direction along the inclined surface (58). When the wind blows in an oblique direction, the force by which the wind pushes the drain mat (1) from the side in the horizontal direction is reduced. This prevents the drain mat (1) from being turned up by the wind.

  In addition, if the shoe tip hits the side surface of the drainage mat (1), it can be considered that the drainage mat (1) is used for scooping. However, since the drainage mat (1) of the embodiment has a gap (57) formed on the back side of the inclined surface (58), when the shoe tip hits the inclined surface (58), the inclined surface ( 58) deforms inward like a cushion. By the deformation of the inclined surface (58), it is possible to prevent the drainage mat (1) from spreading.

  In FIG. 3, θ is the gradient angle of the inclined surface (58) of the tape (50). In one embodiment, this θ is set to 15 ° or more and 60 ° or less.

  When the mat body (10) is installed on an inclined surface, water droplets traveling on the surface of the double raschel (20) surface fabric (21) flow down from the inclined surface (58) of the tape (50).

  Here, in one embodiment, the outer peripheral wall of the mat body (10) is composed of the tape (50), but is not limited thereto, and may be a knitted fabric such as a woven fabric or a raschel. In this case, it is preferable that a mesh-shaped or slit-shaped hole is provided in the outer peripheral wall, and water droplets flowing through the discharge channel (24) of the double raschel (20) through the hole are formed in the mat body (10). It is discharged to the outside.

  Moreover, you may provide a some hole in a tape (50). These holes allow the water accumulated in the gap (57) on the back side of the tape (50) to be discharged. The hole of the tape (50) may be provided on either the inclined surface side or the bottom surface side of the tape (50).

  Further, in one embodiment, the outer peripheral wall is merely a bend of the tape (50). However, the present invention is not limited to this, and as a modified example of the embodiment, as shown in FIG. 4, the tape (51) is bent. A fin (55) extending outward from the portion may be provided.

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to these examples. In addition, the measurement and evaluation of each physical property are as follows.

<Drainage rate (%)>
A vertical drain 20 cm square drainage mat was placed horizontally on a wire mesh that sufficiently permeates water. 200 cc of water was dropped into the center of the drain mat at 20 cc / min. Thereafter, an iron plate of the same size as the drainage mat and a weight were put together so as to be 10 kg and allowed to stand for 3 minutes. Thereafter, the sample was deweighed, and the drainage mat was tilted together with the wire mesh so that the gradient was 4% from the horizontal, and drained by standing for 3 minutes. When the increment (g) of the weight of the drainage mat before and after drainage is ΔW, the drainage rate H represented by the following formula 1 is calculated, the number of measurements is five, and the average value is the average drainage rate.

Drainage rate H (%) = (1−ΔW / 200) × 100 (Formula 1)

<Gradient angle of drain mat outer wall>
As shown in FIG. 3, the reference surface for the slope angle of the inclined surface (58) of the tape (50) is the bottom surface of the sheet member (30).

<Total fineness (decitex)>
Measured according to JIS L 1013: 2010 “Chemical Filament Yarn Test Method”, “B.3.1”, B method described in “8.3.1 Positive Fineness”, the number of measurement was 5 times, and the average value was calculated. Fineness.

[Example 1]
<Double Russell>
Using a 9 gauge double raschel machine (manufactured by Nihon Meyer), a double raschel was prepared so that the weft density was 12.3 course / inch. Table 1 shows the yarn structure and yarn arrangement of the double raschel. Moreover, the organization chart of a double russell is shown in FIG. In Table 1 and FIG. 5, L2 to L4 are front knitted fabrics (21), L5 is a connecting yarn (23), and L6 to L7 are back knitted fabrics (22).

<Toughing>
Using the double raschel as a base fabric, tufting was performed under the following conditions to obtain a drainage mat original fabric (63). In addition, the following pile yarn 1 and pile yarn 2 were aligned on the creel and supplied to the tufting machine.
Tuft machine: 5/16 gauge cut Pile height (height from the bottom of double raschel): 19 mm
Stitch: 4.8 yarns / inch Pile yarn 1: 2000 decitex Polyamide filament yarns of 4 filaments were drawn together and twisted in the S direction at 50 T / m to obtain pile yarn 1.
Pile yarn 2: 1280 dtex 4-filament polyamide filament yarns were drawn together and twisted in the S direction at 50 T / m. The obtained twisted yarn was knit / denited to obtain a pile yarn 2 having a high crimped yarn.

<Precoat>
The resulting drainage mat original fabric (63) was guided into a continuous dryer as usual using a backing machine while applying NBR (acrylonitrile butadiene rubber) with a solid content of 20% as a backing material while applying 900 g / m ² . A drying treatment at 200 ° C. for 2 minutes was performed.

<Backing>
As shown in FIG. 7, a rubber sheet (30) made of a styrene / butadiene copolymer is extruded from a T die (61) attached to the tip of an extruder (60). Next, the pile-implanted base fabric side of the uncoated fabric (63) and the rubber sheet (30) are passed along between the rolling rollers (62a, 62b), and the thickness of the rubber sheet (30) is 1.5 mm. Rolled and bonded to obtain a raw sheet with rubber sheet (64).

<Cutting of the fabric with rubber sheet>
The raw sheet with rubber sheet (64) was cut into 90 cm × 150 cm with a rotary blade in a state inclined by 40 ° from the horizontal.

<Through-hole processing>
Through-holes of the mat body (10) were formed using punches of 5 mmφ at a pitch of 10 cm square.

<Tape processing>
A polyester tape having a width of 30 mm and a thickness of 1.5 mm was subjected to tape processing so as to be an outer peripheral wall of the drain mat, and the drain mat of Example 1 was obtained. Table 3 shows the drainage rate of the drainage mat of Example 1 and the slope angle of the drainage mat outer peripheral wall.

[Example 2]
The mat of Example 2 was obtained by processing under exactly the same conditions as in Example 1 except that the precoat step was omitted. Table 3 shows the drainage rate of the drainage mat of Example 2 and the slope angle of the drainage mat outer peripheral wall.

[Example 3]
The drainage mat of Example 3 was obtained by processing under the same conditions as in Example 2 except that the following polyester fabric was tufted so as to be disposed below the double raschel. Table 3 shows the drainage rate of the drainage mat of Example 3 and the slope angle of the outer peripheral wall of the drainage mat.

<Polyester fabric>
A plain woven fabric having a 1680 dtex 192 filament stretched polyester yarn and a weft density of 18: / inch and width: 24 / inch is used.

[Example 4]
Except that the polyester fabric described in Example 3 was tufted so as to be disposed under the double raschel, it was processed under exactly the same conditions as in Example 1 to obtain a drain mat of Example 4. Table 3 shows the drainage rate of the drainage mat obtained in Example 4 and the slope angle of the drainage mat outer peripheral wall.

[Example 5]
Except for the double raschel shown in FIG. 6 and Table 2, the tape with fins (fin length: 7 mm) shown in FIG. 4 was attached to be the outer peripheral wall of the drainage mat under exactly the same conditions as in Example 1. The drainage mat of Example 5 was obtained by processing. Table 3 shows the drainage rate of the drainage mat and the slope angle of the outer peripheral wall of the drainage mat of Example 5. In Tables 2 and 6, L2 to L4 are front knitted fabrics (21), L5 is a connecting yarn (23), and L6 to L7 are back knitted fabrics (22).

[Comparative Example 1]
<Polypropylene fabric>
A plain woven fabric with a 440 dtex polypropylene tape yarn and a weaving density of 18 / inch and width: 12 / inch was used.
<Toughing>
The above-mentioned polypropylene woven fabric was used as a base fabric, and tufting was performed under the following conditions to obtain a drainage mat original fabric.
Tuft machine: 5/16 gauge cut Pile height: 17mm
Stitch: Nine / inch Pile yarn: Two polyamide filament yarns of 970 dtex 360 filaments were aligned and twisted in the Z direction at 170 T / m to obtain a pile yarn.
Cutting after backing, formation of through holes, and tape processing were performed under the same conditions as in Example 1 to obtain a drain mat of Comparative Example 1.

  As shown in Table 3, the average drainage rate of the drainage mat of Comparative Example 1 is 21%, whereas the average drainage rate of the drainage mats of Examples 1 to 5 is 82 to 83%. It was confirmed that the drainage mats No. 5 to No. 5 were improved in drainage compared to the drainage mat of Comparative Example 1.

(Other examples)
In one embodiment, the drain mat (1) is provided with the tape (50), the nonwoven fabric (27) and the backing material (26), but is not limited thereto, and the tape (50), the nonwoven fabric (27) and the backing material are provided. There may be no material (26). Even in this case, water droplets scraped by the pile (40) can be discharged to the outside of the drainage mat (1) through the discharge channel (24) and the through hole (31).

  Moreover, in one embodiment, although the root part of the pile (40) was firmly fixed with the nonwoven fabric (27) and the rubber sheet (30), when not providing a nonwoven fabric (27), back knitted fabric ( 22) and the rubber sheet (30) should be firmly fixed.

  In one embodiment, the core-sheath conjugate fiber is contained only in the back knitted fabric (22). However, the present invention is not limited thereto, and the core-sheath conjugate fiber may be contained only in the front knitted fabric (21). Alternatively, both the front knitted fabric (21) and the back knitted fabric (22) may contain a core-sheath type composite fiber. When the core knitted fabric (21) contains the core-sheath type composite fiber, the heat treatment of the double raschel (20) can improve the dimensional stability of the surface knitted fabric (21), and the pile (40) can be doubled. When tufting on the russell (20), the knitted fabric (21) can be prevented from sinking.

  As described above, the present invention is useful for a drainage mat in which a pile protrudes from a surface material.

DESCRIPTION OF SYMBOLS 1 Drain mat 10 Mat body 20 Double raschel 21 Front knitted fabric 22 Back knitted fabric 23 Connecting thread 24 Discharge flow path 27 Nonwoven fabric (cloth)
30 Rubber sheet (sheet member)
31 Through hole 40 Pile 50 Tape (outer wall)

Claims (7)

A front knitted fabric (21) and a back knitted fabric (22), a pile (40) protruding from the front knitted fabric (21), and a water-impermeable rubber sheet member laminated on the back knitted fabric (22) (30) and a mat body (10) having a connecting yarn (23) connecting the front knitted fabric (21) and the back knitted fabric (22),
The gap between the connecting yarns (23) constitutes a discharge channel (24) for fluid that has entered from the surface knitted fabric (21),
In the drainage mat provided with a through hole (31) penetrating from the back knitted fabric (22) to the rubber sheet member (30),
The back knitted fabric (22) is a flat knitted structure, and the back knitted fabric (22) which is a flat knitted structure contains a core-sheath type composite fiber whose melting point of the sheath part is lower than the melting point of the core part ,
The mat body (10) includes an outer peripheral wall (50) at an outer edge, the outer peripheral wall (50) is a folded polyester tape, and the outer peripheral wall (50) made of the polyester tape is formed of the front knitted fabric (21 ) To the back knitted fabric (22), and has an inclined surface (58) extending outward from the mat body (10), and a gap (57) is formed on the back side of the inclined surface (58). drainage mat, characterized in that there. The amount of water dripped onto the mat body (10) is W [cc], and the increase in weight of the mat body (10) including water before and after the water is dripped onto the mat body (10) is ΔW. When [g]
0.4 ≦ (1-ΔW / W) ≦ 0.9
The drainage mat according to claim 1, wherein the relationship is satisfied.   The drainage mat according to claim 1 or 2, wherein the number of filaments per strain of the pile (40) is 4 or more and 30 or less, and the single yarn fineness is 200 dtex or more and 800 dtex or less. .   A fabric (27) made of a woven fabric or a nonwoven fabric is arranged in the lower layer of the back knitted fabric (22), and the pile (40) has a root portion fixed by the fabric (27) and the sheet member (30). The drainage mat according to any one of claims 1 to 3, wherein the drainage mat is provided. The drainage according to any one of claims 1 to 4 , wherein a slope angle of the inclined surface (58) is 15 ° or more and 60 ° or less with respect to a bottom surface of the sheet member (30). mat. The outer peripheral wall (50) includes a fin (55) extending outward from the mat body (10) from a bent portion of the tape, and when the mat body (10) is placed on the ground, the fin (55) The drainage mat according to any one of claims 1 to 5, wherein the drainage mat is grounded. The drainage mat according to any one of claims 1 to 6 , wherein a backing material (26) is laminated between the knitted fabric (22) and the sheet member (30).