JPH11323799A - Pressing net for manufacture of building material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a pressing net free from problems of the easy soiling property of a conventional needle felt and the raw material leakage of a woven net. SOLUTION: This pressing net for the manufacture of a building material is a net supporting and conveying a formed building material and squeezing the material by pressing with a mold in the course of conveyance. The pressing net is a belt composed of a woven net produced by using yarn 4 constituting the weft of the pressing face side and formed by collecting monofilaments or monofilaments and small-diameter single fibers in a state to form narrow water-squeezing gap between the single fibers and at least one kind of warp 1 selected from a monofilament, twisted monofilament yarn and yarn containing a monofilament as the core, and placing the wefts in a plurality of layers and the warps 1 in the form of a single layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press net for producing building materials such as slate and tile.

[0002]

2. Description of the Related Art A method of manufacturing building materials such as slate and tile is a well-known technology, and a slurry obtained by dissolving raw materials such as cement, perlite, gypsum, slag, aggregate, organic fiber, inorganic fiber, and asbestos in water is used. The paper is made in a paper making part, and then conveyed to a press part to perform press water squeezing, molding, die cutting, and the like. As a press part, (a) As shown in FIG. 10, a needle felt is hung between rolls, and a die is placed on the press surface side, which is the upper side of the felt. Using a device equipped with a suction box, feed the paper on the felt,
A long net method in which the paper is conveyed, pressed in a mold part to squeeze water, and excess water is sucked in a suction box, and (b) a needle felt or a woven mesh is attached to an upper portion as shown in FIG. Using a device in which a mold is arranged so that it is sequentially moved and installed at the lower part of the suction box, the papermaking material is supplied on the mold, and the mold is moved and installed at the lower part of the suction box. A method of pressing and squeezing water and sucking out excess water. (C) As shown in FIG. 12, an upper suction box with a needle felt or a woven mesh attached to the upper part, which is sequentially moved and installed at the lower part. The machine is equipped with a lower suction box equipped with a needle felt and a woven mesh as in A method in which the box is moved to the lower part of the upper suction box, and is pressed in the upper suction box to squeeze water and suck excess water. (D) As shown in FIG. Using a device in which a punching plate with a needle felt or woven mesh attached to the upper side of a box and a caterpillar connected to the middle part is arranged, the papermaking material is supplied on the felt, and the punching plate is placed between the mold and the suction box. In this method, water is removed by pressing with a mold and excess water is sucked by a suction box. In the above-described method of pressing a building material, a so-called needle felt in which a bat made of a synthetic fiber is entangled by needling on the front and back surfaces of a base fabric in which monofilaments or multifilaments are woven is conventionally used. This is because the raw material of building materials such as slate and tile is different from paper raw material and mainly composed of very fine powder material as described above. This is because it is difficult to produce a building material of pods. In addition, when a woven net is used, a needle felt is used due to a problem that a mark of the woven net is transferred to a product.

[0003]

In the press part of a building material manufacturing machine, as described above, water is squeezed with a felt, and excess water from the papermaking material is passed through the felt by a forced suction device such as a suction box. Has been removed. Needle felt is finely formed by covering the front and back with a pad.Therefore, there is an advantage that the leakage of the raw material is small and the yield is good.On the other hand, since the pad is dense in the entire z-axis direction, the raw material is There is a disadvantage that it is easily accumulated by being accumulated inside the felt.

[0004] In addition, the properties of the needle felt, such as poor elongation stiffness, bending stiffness, and stability of dimensions and posture, have also been serious drawbacks. In the fourdrinier method, since the building material has a very large basis weight for making a paper, in order to run the press net on which the paper is loaded well, it is necessary to apply a large tension to the press net and make sure that the drive roll Is required to be transmitted. However, since the needle felt has a low elongation rigidity and a large shrinkage in width and a decrease in thickness due to elongation, a large tension cannot be applied and the needle felt cannot be run satisfactorily. In addition, there is a problem that slip occurs. When slippage occurs, abrasion of the running surface of the press net is promoted to shorten the service life, and a problem such as an increase in an electric power load and a stop of the machine occurs, which seriously affects productivity. In addition, because the needle felt cannot be stretched strongly and has low bending stiffness, it cannot withstand the weight of the paper product in the area where there is no support for the press net between the suction box and the transport roll. In addition, there is a problem that the paper is bent and cracks or cracks are generated in the paper product. Further, as the needle felt is used, there is also a problem that the needle felt is gradually compressed and its thickness is reduced, and the water squeezing ability is accordingly reduced. Also, there is a problem that the needle felt butt is crushed in accordance with the unevenness of the press die, the die remains, and even after the die is changed, the previous die is transferred from the felt to the product. Was. Further, when cutting a paper product by a long-mesh press part, there is a problem that the teeth of the cutter cut the bat fiber or the base cloth and holes are easily generated.

The present invention solves the above-mentioned drawbacks and provides a press net for producing building materials having good yield, good rigidity, cleanability and dehydration.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a press net for manufacturing a building material, comprising: 1. a papermaking building material placed and transported; The dehydration side is monofilament or
Monofilaments and yarns with small diameters are combined to form a fine water gap between the filaments.
A press net for building material production, which is a belt made of a woven mesh in which at least one kind of yarn selected from a monofilament twisted yarn and a core wire is a monofilament, a plurality of wefts are arranged, and a warp is arranged in a single layer. 2. A plurality of warps are arranged, and the dewatering surface side in contact with the suction box is at least one kind of yarn selected from monofilaments, monofilament twisted yarns, and yarns whose core wire is a monofilament, and the press surface side is a monofilament.
2. For building material production according to item 1, wherein at least one kind of yarn is selected from a monofilament twisted yarn, a yarn whose core wire is a monofilament, and a yarn in which a fine water gap is formed between yarns obtained by combining small diameter yarns. Press net. 3. Yarns formed by combining small diameter yarns and forming fine water gaps between the yarns are spun yarns, multifilaments, brushed yarns,
Monofilament twisted yarn, molding yarn, filament-processed yarn, yarn obtained by winding a spun yarn around a monofilament core wire, yarn obtained by winding a multifilament around a monofilament core wire, or a yarn obtained by co-twisting at least two or more of these. 3. The press net for producing a building material according to paragraph 1 or 2. 4. The press net according to any one of claims 1 to 3, wherein the yarn whose core wire is a monofilament is a yarn obtained by winding a spun yarn or a multifilament around a monofilament. 5. 5. The press net for construction material production according to any one of items 1 to 4, wherein an intermediate weft layer made of monofilament is disposed between the dewatering surface side weft layer and the press surface side weft layer. 6. Between the dewatering surface side weft layer and the press surface side weft layer, spun yarn, multifilament, raised yarn, monofilament twisted yarn, molding yarn, filament processed yarn, monofilament cored yarn with spun yarn wound, monofilament cored yarn The press net for building material production according to any one of claims 1 to 4, wherein an intermediate weft layer selected from a yarn wound with a filament or a yarn twisted with at least two or more of them is arranged. . 7. Between the dewatering surface side weft layer and the press surface side weft layer, monofilament and spun yarn, multifilament, raised yarn, monofilament twisted yarn, molding yarn, filament processed yarn, yarn in which spun yarn is wound around the core of monofilament, monofilament An intermediate weft layer composed of a yarn selected from a yarn in which a multifilament is wound around a core wire and a yarn in which at least two types are co-twisted,
The press net for manufacturing a building material according to any one of items 1 to 4. About.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION In a press net for building material production, a water squeezing space must be fine in order to obtain a good product having a low water content and no mark. However, since the structure such as felt has the various problems described above, the present invention employs a woven mesh structure without using a bat, and a yarn having a fine water-squeezing space on the press surface side, for example, a spun yarn, a multifilament, a brushed yarn. A monofilament twisted yarn, a molding yarn, a filament processed yarn, a yarn obtained by winding a spun yarn around a monofilament core, a yarn obtained by winding a multifilament around a monofilament core, or a yarn obtained by co-twisting at least two or more of these. By weaving yarns, etc., a fine water-squeezing space is formed densely on the press side to prevent leakage of raw materials from the slurry and improve the yield. With this structure, a three-dimensional space that is easy to pass through the washing shower is ensured to improve washing performance and improve rigidity. Than is the formation of the multi-functional fabrics that. In order to secure a large dewatering space on the dewatering surface side and a three-dimensional space that is easy to pass through the washing shower, and to maintain the space well even if the dewatering surface side is worn, the weft on the dewatering surface side has high rigidity and abrasion resistance. It is necessary to arrange a good monofilament. Various yarns can be selected as the yarn having a fine water-squeezing space as described above. Particularly, as the yarn used for the pressing surface, a yarn obtained by co-twisting two or more types of yarns is a binding force of the fiber. It is suitable because it is strong and excellent in water squeezing.

In the present specification, spun yarn means a yarn obtained by converging short fibers into a thread, and is a spun yarn or the like. In addition, multifilaments are filaments obtained by converging fine single fibers, brushed yarns are those in which the surface of the multifilament is scratched with needles and fluffed, and filament-processed yarns are stretched and shrunk into filament yarns. It is a thread-like body that has been subjected to high working, crimping, and the like, and includes yarns generally called textured yarn, bulky yarn, stretch yarn, and Taslan-processed yarn, and includes wooly nylon and the like. The molding yarn is a yarn in which short fibers are radially arranged around a core yarn such as a multifilament. Also included are those obtained by subjecting short fibers arranged radially to crimping or the like. In addition, the press surface side refers to the side that contacts the product, and the dewatering surface side refers to the side that contacts the suction box. In the long net type, the dewatering surface side is the running surface side.

The three-dimensional space on the dewatering surface also serves as a large dewatering space when sucked by the suction box. Therefore, the press net of the present invention has a very good dewatering property despite little leakage of raw materials. And this good dehydration property, even if the dehydration surface is worn and the monofilament is shaved,
Since the three-dimensional space is only slightly reduced and the flat space is not changed, the dehydration is hardly reduced and can be maintained well until the end of use. This is an excellent effect in the case of the fourdrinier type. In the case of felt, the back surface is filled with fine synthetic fiber bats, and since there is no large dewatering space, the dewatering performance is originally poor. Since the power is weak, the water squeezing space is crushed, and dirt is accumulated during the squeezing space, and the dewatering property is further reduced.

Further, since the dewatering surface has a monofilament network structure, the stretch stiffness and the bending stiffness of the woven fabric are extremely higher than that of needle felt, so that a large tension is applied to the fabric to ensure that it is strongly stretched. The driving force can be transmitted to the vehicle and the vehicle can run satisfactorily, and there is no problem that a slip occurs. Further, even in a portion where there is no support for the press net between the suction box and the transport roll, there is no problem that the product sufficiently bears the weight of the product, does not bend, and the product does not crack or crack. In addition, a secondary effect that does not require an apparatus such as an excessive stretcher or a widening roll can be obtained. Further, the decrease in thickness during use is extremely small. As the needle felt is used, it is gradually compressed and its thickness is reduced, and the water squeezing capacity is reduced accordingly.However, the present invention has a high rigidity as a woven mesh, so that the thickness of the needle felt is small, and the needle felt is used until the end of use. Good water pumping ability can be maintained.

Regarding the high-pressure washing shower resistance, the yarn constituting the surface of the press net for manufacturing a building material according to the present invention is an aggregate of fine fibers similar to that of a needle felt bat, but is entirely a woven net. Since it has a structure, it is woven into a warp in the case of a weft and a weft in the case of a warp in a short cycle, and is strongly restrained, so that it is not cut or dropped by the impact of shower water. This high-pressure shower resistance is also an effect obtained by forming the press surface into a woven mesh structure. Further, as described above, the present invention does not have a structure in which fine fibers are densely arranged in the entire Z-axis direction such as a needle felt, but an aggregate of fine fibers is formed only on a pressing surface. Because of the tightly constrained structure, dirt is unlikely to accumulate in the first place. Further, the felt can be sufficiently washed with a low-pressure shower that cannot wash the felt even if it is soiled.

With respect to the woven structure, the warp has a layer of a monofilament, a monofilament twisted yarn, or a monofilament whose core wire is a monofilament, and the weft gathers small diameter yarns on the press surface side to form a fine water gap between the yarns. The formed yarn is not particularly limited as long as it is formed in a multilayer in which monofilaments are mainly arranged on the dewatering surface side, and a warp single weft double,
Various structures, such as a warp single weft triple, a warp double weft triple, and a warp double weft double double layer structure, can be adopted. The layer of the warp monofilament, the monofilament twisted yarn or the yarn whose core wire is a monofilament improves rigidity and dimensional stability,
The monofilament weft on the dewatering side plays a role in improving rigidity and abrasion resistance and securing a large three-dimensional space. The material of the yarn is not particularly limited, and various materials such as synthetic fibers such as polyester, polyamide and polyphenylene sulfide, chemical fibers such as rayon, and natural fibers such as cotton can be used. When the dewatered surface weft material is polyamide, abrasion resistance, nip resistance, and fibril resistance are improved, and when polyester is used, rigidity is increased. Therefore, when importance is placed on rigidity, polyester is used. In addition, polyamide and polyester can be arranged alternately, for example, in consideration of the balance between the two properties.

When the warp has two layers, the dewatering side can be a monofilament and the pressing surface side can be a yarn in which fine water gaps are formed between the small yarns. The monofilament on the dewatering surface mainly improves rigidity and dimensional stability, and the press surface side reduces the leakage of the raw material with the yarn that forms a fine water gap between the yarns where small diameter yarns are gathered. The aim is to improve the water removal capacity. The same intermediate weft layer as the monofilament or the pressed surface can be arranged between the press surface side and the dewatering surface side of the weft, and the yield can be improved. Depending on the required conditions for the middle layer,
If you want to improve the rigidity, you can increase the rigidity by arranging monofilaments.If you want to improve the yield, create a fine water gap between the yarns that have the same small diameter as the pressed surface. The formed yarn is arranged. The intermediate performance described above can also be obtained by alternately arranging the monofilaments and the yarns obtained by combining the small diameter yarns. In addition, on the dewatering surface side, we increase the water removal efficiency,
When it is desired to reduce the water content of the product, a monofilament and a yarn in which a fine dewatering gap is formed between the yarns obtained by combining small diameter yarns can be arranged.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on embodiments with reference to the drawings. FIG. 1 is a plan view showing an embodiment of a press net for building material production according to the present invention, and FIG. 2 is a cross-sectional view along a warp taken along line II ′ of FIG. The warp 1 has a diameter of 0.
90 pieces of 35 mm polyamide monofilament are arranged per inch, and 22 threads per inch are formed by co-twisting 540 denier polyamide brushed yarn and 800 denier polyamide multifilament crimped yarn on the press side weft 2. And the middle layer weft 3 has a diameter of 0.45 mm.
Of polyester monofilament per inch
This is a press net for building material production of an 8-shaft warp single weft triple weave in which a polyamide monofilament and a polyester monofilament having a diameter of 0.40 mm are arranged 11 per inch on the dewatering surface side weft 4.

FIG. 3 is a plan view showing one embodiment of a press net for producing a building material according to the present invention, and FIG. 4 is a sectional view taken along the line II-II 'of FIG. An eight-shaft warp, single weft, triple weave construction material in which a polyester monofilament is arranged in the warp 1, a polyamide spun yarn is arranged in the press side weft 2, and a polyamide monofilament is arranged in the intermediate layer weft 3 and the dewatering side weft 4. It is an additional press net. FIG. 5 is a plan view showing one embodiment of a press net for building material production according to the present invention, and FIG. 6 is a cross-sectional view taken along a warp thread cut along the line III-III ′ in FIG. Polyamide molding yarn is arranged on the press surface side weft 2, polyester monofilament on the middle layer weft 3, dewatering surface side weft 4
Is a press network for manufacturing a building material of an eight-shaft warp single weft triple weave in which twisted polyamide monofilaments and polyamide filaments are alternately arranged, and warp 1 has ester poly monofilaments and polyester monofilament twisted yarns arranged in parallel with the same structure. .

FIG. 7 is a cross-sectional view along a warp showing another embodiment of a press net for producing a building material according to the present invention. The warp yarn 5 is a polyester monofilament twisted yarn, the press surface side weft 6 is a polyamide spun yarn, the intermediate layer weft is a polyamide monofilament twisted intermediate layer weft 7 and a polyamide monofilament intermediate layer weft 8 alternately, and the dewatering surface side weft 9. This is a press net for building material production of an eight-shaft weft triple weave in which a polyamide monofilament is disposed.

FIG. 8 is a cross-sectional view along a warp showing another embodiment of a press net for building material production according to the present invention. Polyamide multifilament for press side warp 10, polyester monofilament for dewatering side warp 11, polyamide multifilament for press side weft 12, intermediate layer weft 1
Reference numeral 3 denotes a press net for building material production of an eight-shaft warp double weft triple weave in which a polyamide monofilament twist yarn and a dewatering surface side weft 14 a polyamide monofilament are arranged.

FIG. 9 is a cross-sectional view taken along a weft showing another embodiment of a press net for producing a building material according to the present invention. A thread in which a polyester spun yarn is wound around a polyester monofilament core yarn on a press surface side warp 15, a polyester monofilament on a dewatering surface side warp 16, a wooly nylon yarn on a press surface side weft 17, a polyamide monofilament on a dewatering surface side weft 18, and binding. This is a press network for producing a building material of an eight-shaft warp double weft double weave double-layer fabric in which a polyamide monofilament is arranged as the yarn 19.

FIGS. 10 to 13 are explanatory diagrams showing the types of press parts of the building material manufacturing apparatus. FIG. 10 shows a case in which a needle felt 20 is hung between rolls, a die 21 is provided on a press surface side which is an upper side of the felt, and a suction box 2 is provided on a running surface side which is a lower side of the felt with the felt therebetween.
2 is a long net type apparatus that supplies and transports the papermaking product 23 on a felt, presses it with a die in a die part, squeezes water, and sucks excess water with a suction box. FIG. 11 shows a suction box 22 having a needle felt 20 and a woven mesh attached to an upper part thereof, and a mold 21 disposed so as to be sequentially moved and installed at a lower part thereof. This device is used for a method in which a mold is moved and installed at a lower part of a suction box, and is pressed in the suction box to squeeze water and to suck excess water. FIG. 12 shows an upper suction box 22 having a needle felt 20 and a woven mesh attached to an upper portion thereof, and a lower suction box 22 having a needle felt and a woven mesh attached thereto so as to be sequentially moved and installed. This is an apparatus used for a method in which the paper 23 is supplied onto the suction box, the lower suction box is moved to the lower part of the upper suction box, and the upper suction box is pressed to squeeze water and suck excess water. FIG. 13 shows a papermaking machine on a punching metal in which a mold 21 is provided on an upper part, a suction box 22 is provided on a lower part, and a punching metal 24 on which a needle felt 20 or a woven mesh is attached is provided on an upper part connected in a caterpillar shape on an intermediate part. This is an apparatus used in a method in which 23 is supplied and conveyed, pressed by a die in a die part, squeezed, and suctioned excess water by a suction box. Incidentally, the press net for building material production of the present invention has the most excellent effect when used in a long net type press machine for production of building material, but is not limited to this, and is not limited to this. It can also be used for press equipment.

Next, the effect of the present invention will be described by showing a comparative test between a press net for manufacturing a building material according to an embodiment of the present invention and a needle felt as a conventional example. The embodiment shown in FIGS. 1 and 2 is adopted as an embodiment of the present invention, and a conventional needle felt shown below is used as a comparative example.

[0021] Polyamide monofilament twist yarns in Comparative Example warp, a needle felt made of entangled by needling a polyamide batt of 2.2Kg per 1 m ² based on fabric using a polyamide monofilament twist yarns in the weft.

Comparative test Press squeezing test The examples and comparative examples are set on a suction box in which a top plate is formed of punched metal, and a paper product is placed thereon. Next, press water is pressed from above, and the water content of the paper after the water press is measured, and at the same time, the soiling of the examples and comparative examples is observed. 1) Water content Example 25% Comparative example 27% 2) Water content Example No stain Comparative example Stained (clogging occurred) Rigidity 1) Elongation The elongation and the breaking strength under dry and wet tensions of 7 kg / cm and 14 kg / cm in the length and width directions were compared. Table 1 shows the results. 2) Bending The bending stiffness in the length direction and the width direction was compared. (Measured using a Taberstay Fune tester manufactured by Kumagai Riki Kogyo Co., Ltd.) The example was 35.6 g-cm in the length direction and 114.8 in the width direction.
g-cm The comparative example is 18.4 g-cm in the length direction and 14.7 g in the width direction.
-Cm 3. Shower resistance The example and the comparative example were set in a frame, and a high-pressure shower was applied under the following conditions, and the durability to the shower was checked. Shower pressure: 20, 30 kg / cm ² Nozzle diameter: 1 mm Distance: 100 mm Sliding distance: 50 mm in the warp direction, 50 mm in the weft direction Sliding speed: 50 mm / 30 sec in the warp direction, 50 mm / 7 sec in the weft direction At a shower pressure of 20 kg / cm ² In Comparative Example, considerable perforation was observed in 30 minutes. In Example, some fluffing occurred in 45 minutes, but no perforation and no cutting of the yarn were observed. At a shower pressure of 30 Kg / cm ² , perforations occurred before one cycle in the comparative example, and fluffing occurred slightly in 20 minutes in the examples, but no perforation or cutting of the yarn was observed. 4. Nip resistance Under the following conditions, the sample was sandwiched between two rolls and slid while adding a nip to determine the fibrillation and crushing of the yarn. Tensile force: 2.5 kg / cm Nip roll: φ40 mm x 2 pieces (made of chrome-plated steel) Nip condition: Dry 15 kg / cm Stroke: 100 mm Sliding speed: 50 times / min Number of sliding times: 15,000 reciprocations There is not much change in appearance, but the thickness is 4
It also decreased by 0.64%. In the example, fibrillation did not occur at all, and the co-twisted yarn of the polyamide multifilament Taslan processed yarn and the polyamide multifilament crimped yarn of the press surface side weft was slightly flattened. The reduction in thickness was 7.8%. 5. Cutter resistance After the press squeezing test, the paper is cut with a building material cutter,
The surface condition of the cutter contact portion of the example and the comparative example was observed with a magnifying glass. Example No cutter trace Comparative example Bat cut, cutter trace generation From the above test results, the press net for building material production of the present invention is far more advantageous in rigidity, shower resistance, and nip resistance than needle felt. It turns out that it is excellent.

[0023]

[Table 1]

[0024]

According to the press net for building material production of the present invention, the leakage of the raw material is small, the press with a good yield can be performed, and the water squeezing is good. In addition, because of its excellent rigidity, it does not cause cracks or cracks in the paper products.It also has excellent shower resistance, is capable of high-pressure shower cleaning, and can easily remove dirt. Can be raised. Furthermore, since it has excellent wear resistance and nip resistance, and has a small decrease in thickness, even when used for a long period of time, good water squeezing can be maintained until the end of use. By using a press net for building material production having such good rigidity, detergency, water squeezing, and abrasion resistance, it is possible to achieve an improvement in productivity of building materials, which is the final object of the present invention.

[Brief description of the drawings]

FIG. 1 is a plan view showing one embodiment of a press net for producing a building material according to the present invention.

FIG. 2 is a cross-sectional view along a warp taken along line II ′ of FIG.

FIG. 3 is a plan view showing one embodiment of a press net for building material production of the present invention.

FIG. 4 is a cross-sectional view taken along the warp taken along the line II-II ′ of FIG.

FIG. 5 is a plan view showing one embodiment of a press net for producing a building material according to the present invention.

FIG. 6 is a cross-sectional view along a warp cut along the line III-III ′ of FIG. 5;

FIG. 7 is a cross-sectional view along a warp showing another embodiment of a press net for building material production of the present invention.

FIG. 8 is a cross-sectional view along another warp showing another embodiment of a press net for building material production of the present invention.

FIG. 9 is a sectional view along a weft showing another embodiment of the press net for building material production of the present invention.

FIG. 10 is an explanatory diagram showing a press part of the building material manufacturing apparatus.

FIG. 11 is an explanatory view showing a press part of the building material manufacturing apparatus.

FIG. 12 is an explanatory diagram showing a press part of the building material manufacturing apparatus.

FIG. 13 is an explanatory view showing a press part of the building material manufacturing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Warp 2 Press surface side weft 3 Intermediate layer weft 4 Dehydration surface side weft 5 Warp 6 Press surface side weft 7 Intermediate layer weft 8 Intermediate layer weft 9 Dehydration surface side weft 10 Press surface side warp 11 Dehydration surface side warp 12 Press surface side Weft 13 Intermediate layer weft 14 Dewatering surface side weft 15 Press surface side warp 16 Dehydration surface side warp 17 Press surface side weft 18 Dewatering surface side weft 19 Binding yarn 20 Felt 21 Mold 22 Suction box 23 Papermaking 24 Punching plate

Claims (7)

[Claims] 1. A press net for producing a building material in which a papermaking building material is placed and conveyed, and pressed by a forming die during the conveyance to squeeze water, wherein the weft is dehydrated with a monofilament or a monofilament or a small diameter. And a plurality of layers of weft yarns, with the warp yarns being at least one kind of yarn selected from monofilaments, monofilament twisted yarns, and yarns whose core wire is a monofilament. A press net for building material production, which is a belt made of a woven net made by arranging warps in a single layer. 2. A plurality of warp yarns are arranged, and a dewatering surface side in contact with a suction box is at least one kind of yarn selected from monofilaments, monofilament twisted yarns and yarns whose core wire is a monofilament, and a press surface side is a monofilament, monofilament twisted yarn. The core wire is a monofilament yarn, and at least one type of yarn selected from yarns in which fine water gaps are formed between yarns obtained by combining small diameter yarns.
A press net for manufacturing a building material according to claim 1. 3. A yarn in which small diameter yarns are combined to form a fine water gap between the yarns are spun yarns, multifilaments,
Brushed yarns, monofilament twisted yarns, molding yarns, filament processed yarns, yarns with a spun yarn wound around a monofilament core, yarns with a multifilament wound around a monofilament core, or yarns with at least two or more of these co-twisted The press net for building material production according to claim 1 or 2, which is a twisted yarn. 4. The press net according to any one of claims 1 to 3, wherein the yarn whose core wire is a monofilament is a yarn obtained by winding a spun yarn or a multifilament around a monofilament. 5. An intermediate weft layer composed of monofilaments is disposed between a dewatering surface side weft layer and a press surface side weft layer.
A press net for building material production according to any one of claims 1 to 4. 6. A yarn obtained by winding a spun yarn around a core wire of a spun yarn, a multifilament, a raised yarn, a monofilament twisted yarn, a molding yarn, a filament processed yarn, and a monofilament between a dewatering surface side weft layer and a press surface side weft layer. The yarn according to any one of claims 1 to 4, wherein an intermediate weft layer selected from a yarn obtained by winding a multifilament around a monofilament core wire, or a yarn obtained by co-twisting at least two or more of them is arranged. Additional press net made of building materials. 7. A spun yarn is wound around a monofilament and a spun yarn, a multifilament, a raised yarn, a monofilament twisted yarn, a molding yarn, a filament processed yarn, and a monofilament core wire between the dewatering surface side weft layer and the press surface side weft layer. 5. An intermediate weft layer comprising at least two yarns selected from the group consisting of twisted yarns, yarns obtained by winding multifilaments around a monofilament core wire, and yarns obtained by co-twisting at least two of these yarns. Pressing net for building material production described in.