JPH08144432A - Lattice-shaped reinforcing base material and manufacture thereof and board based on their application - Google Patents

Abstract

PURPOSE: To make it possible to impregnate high viscosity matrices by laying out a rod which crosses a bundle of vertical reinforcement fibers in the shape of a lattice at the middle position of a twisting intersection and expanding the intersection between the bundle of the vertical reinforcement fibers and the rod. CONSTITUTION: Rods 9, which cross bundles of fibers 10 at right angles, are laid out in the shape of a lattice with a spacing at the intersections 14 located at the middle position of twisted intersections which are adjacent with a pair of vertical reinforcement bundles 10, which are installed by plurals in parallel to each other with a spacing and twisted by an integer times 180 deg. reversely by turns in a lattice-shaped reinforcing base material 11 and the intersections 14 are expanded. Upper and lower reinforcing layers 16 and 17 are laid out where the reinforcing base material 11 is loaded on the reinforcing layer 17, thereby filling up resin concrete 18 between the reinforcing layers 16 and 17, and pressure molding and forming a board-like member 19. Since the intersections 14 are expanded, the reinforcing base material comes in direct contact with the reinforcing layer 17 only at the intersections 14, which makes it possible to hold a clearance between the flat reinforcing layers 17 and impregnate the high viscosity resin concrete 18 when it is used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lattice-like reinforcing base material for a molded body mainly composed of plastic, cement, asphalt, etc., a method for producing the same, and improvement of a plate-like body using the same.

[0002]

2. Description of the Related Art Conventionally, there are various types of grid-like reinforcing base materials for molded products mainly composed of plastic, cement or asphalt. For example, there is a reinforcing base material for a molded body such as plastic of a grid-shaped FRP net, resin concrete, etc., which intersects each constituent material having a rectangular cross section. Further, there is a lattice-shaped asphalt reinforcing base material in which a treatment liquid such as an asphalt emulsion is attached to a perforated glass fiber woven fabric (described in JP-A-6-115977). Further, there is a grid-like concrete reinforcing base material in which fiber bundles of a plurality of glass fibers or carbon fibers are crossed in a grid pattern, and the crossing parts are laminated in three or more layers (described in JP-A-62-153449).

[0003]

The above-mentioned conventional lattice-like reinforcing base material has a flat cross section at the time of normal molding and cannot adhere to other materials so that voids cannot be maintained. When used, the impregnation is insufficient, and the molded product obtained by heating easily swells, and the defective rate is high.
In addition, the woven cloth with a perforated structure is likely to cause the collapse of the weaving structure due to the coarse mesh of the woven cloth, resulting in poor workability. As a countermeasure against this, it is proposed to use a "woven cloth", but the cost increase and the above The impregnating property deteriorated is inevitable. The present invention
Resolving the above-mentioned problems of the prior art, there is no occurrence of collapsing, sufficient impregnation of a high-viscosity matrix, the molded product obtained by pressure molding is less likely to swell, and the defect rate is low. An object of the present invention is to obtain a substrate, a manufacturing method capable of efficiently and continuously producing the lattice-like reinforcing substrate, and a plate-like body using the lattice-like reinforcing substrate.

[0004]

In order to achieve the above-mentioned object, the present invention comprises a pair of thermosetting impregnating resins twisted in parallel at regular intervals in an alternating multiple of 180 degrees at regular intervals. Fiber rods made of fiber-reinforced plastic of a certain length orthogonal to the longitudinal fiber bundles are arranged in a lattice at intervals at the adjacent twist crossing intermediate positions of the longitudinal fiber bundles, and the vertical fiber bundles are used to The problem is solved by a grid-like reinforcing base material in which rods are fixed and the intersections of the longitudinal fiber bundles and the rods are expanded. Furthermore, a pair of uncured longitudinal fiber bundles are sent out in parallel at regular intervals under tension and impregnated with a thermosetting resin, and the longitudinal fiber bundles are twisted alternately in forward and reverse directions by an integer multiple of 180 degrees. While advancing, the fiber-reinforced plastic rods having a constant length from the direction perpendicular to the advancing direction of the longitudinal fiber bundles were fed to the intermediate portion of the adjacent twisting crossings of the longitudinal fiber bundles at intervals to form a lattice-like body. After that, the problem was solved by the method for producing a lattice-like reinforcing base material, which comprises heat curing and cutting into a constant length in the traveling direction. Furthermore, in the plate-like body in which resin concrete is filled and solidified between the upper and lower reinforcing layers,
The problem is solved by a plate-shaped body in which the grid-like reinforcing base material is disposed at least on the lower reinforcing layer.

The longitudinal fiber bundles used in the lattice-like reinforcing base material of the present invention are fibers of glass, carbon, aramid, boron, alumina, silicon carbide or metal, and the thermosetting impregnating resin is polyester. -Epoxy or phenol is used, and the thickness of the constituent fibers and fiber bundles is appropriately selected and designed according to the purpose of use of the grid-like reinforcing base material. The cross-sectional shape of the fiber-reinforced plastic rod used for the grid-like reinforcing base material of the present invention is not particularly limited, but there are, for example, circular, rectangular or irregular shapes, and the thickness is the purpose of use of the grid-like reinforcing base material. Select and design according to your needs.
Fibers such as glass, carbon, aramid, boron, alumina, silicon carbide, or metal are used as the reinforcing material, and polyester, epoxy, phenol, or the like is used as the matrix resin, which is usually formed by drawing. The lattice spacing of the fiber-reinforced plastic rod orthogonal to the longitudinal fiber bundle used in the lattice-like reinforcing base material of the present invention is appropriately selected according to the purpose of use of the lattice-like reinforcing base material, but the shape of the eyes is square. The shape may be rectangular or rectangular, but if strength is required, it can be easily obtained by making the distance between the rods narrow. The longitudinal fiber bundles used in the lattice-like reinforcing base material of the present invention are twisted alternately in a forward and reverse manner by an integral multiple of 180 degrees. The choice of this integer varies depending on the thickness of each material, the spacing of the lattice, etc. Normally, when the number is 4 or more, the resin is squeezed to cause dripping, etc.
It is preferably used in the range of 4.

[0006]

In the lattice-like reinforcing base material of the present invention, fiber-reinforced plastic rods orthogonal to the longitudinal fiber bundles are arranged in a lattice pattern, and the rods are fixed by the longitudinal fiber bundles so that the longitudinal fiber bundles intersect with the rods. Since only the part is swelled, it is possible to maintain voids between it and other flat materials when it is used.Therefore, even when a highly viscous matrix is used, impregnation is possible and the resulting molded product is swollen. Is less likely to occur and the defect rate is low. The method for producing a lattice-like reinforcing base material of the present invention can easily and efficiently continuously produce the lattice-like reinforcing base material of the present invention. The plate-like body using the lattice-like reinforcing base material of the present invention,
The reinforcing base material is sufficiently impregnated with the matrix, and the quality is stable.

[0007]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an example of a schematic manufacturing process diagram by a method for manufacturing a lattice-like reinforcing base material of the present invention, and is a side view (a) and a plan view (b).
FIG. 2 is a schematic side view of essential parts of an example of a rotating device used in the method for manufacturing a lattice-shaped reinforcing base material of the present invention. FIG. 3 is a partially enlarged schematic view of an example of the lattice-like reinforcing base material of the present invention, which is a side view (a) and a plan view (b). FIG. 4 is a partially enlarged schematic view of another example of the lattice-shaped reinforcing base material of the present invention, and is a side view (a) and a plan view (b). FIG. 5 is a partially enlarged cross-sectional view of an example of a plate-like body using the lattice-like reinforcing base material of the present invention shown in FIG.

In FIG. 3, a lattice-like reinforcing base material 11 includes a plurality of longitudinal fiber bundles 10 and 1 each containing a pair of thermosetting impregnated resins twisted in parallel and in a reverse sequence by 180 degrees at regular intervals p.
Intersection 1 of 0 adjacent adjoining torsional intersection intermediate positions
4, a constant length q orthogonal to the longitudinal fiber bundles 10 and 10
The fiber-reinforced plastic rods 9 and 9 are arranged in a square lattice pattern at intervals p, and the rods 9 and 9 are fixed by the longitudinal fiber bundles 10 and 10, and the intersections 14 and 14 are inflated. are doing. The constant length q of the rods 9, 9 determines the total width of the lattice-like reinforcing base material 11, and the longitudinal fiber bundle 1
The total length of the lattice-like reinforcing base material 11 is determined by the cut lengths of 0 and 10, and a plurality of longitudinal fiber bundles 10 are arranged at intervals p in the range of the full width and the total length according to the purpose of use of the lattice-like reinforcing base material 11, 10 and rods 9, 9 are arranged.

In FIG. 4, a lattice-like reinforcing base material 11 includes a plurality of longitudinal fiber bundles 10 and 1 containing a pair of thermosetting impregnated resins twisted in parallel and alternately in a reverse 360 degree direction at regular intervals n.
Intersections 14 and 14 of 0 adjacent twist intersections
Further, rods 9 and 9 made of fiber reinforced plastic having a constant length orthogonal to the longitudinal fiber bundles 10 and 10 are arranged in a rectangular lattice pattern at intervals m, and the rods 9 and 9 are arranged by the longitudinal fiber bundles 10 and 10. Is fixed and the intersections 14 and 14 are inflated. As described in the embodiment of FIG. 3,
At intervals n within the full width range according to the purpose of use,
A plurality of longitudinal muscle fiber bundles 10 and 1 at intervals m in the range of the entire length
0 and rods 9, 9.

In FIG. 1, a plurality of fiber bundle stands 1 placed in a silkworm shelf type so that the ends thereof can be pulled out from a longitudinal fiber bundle 10,
10 is pulled out, and a plurality of uncured longitudinal fiber bundles 10 and 10 are arranged in parallel at regular intervals p under tension to impregnate the thermosetting resin in the impregnation tank 2 to form the longitudinal fiber bundles 10 and 10. Each of the longitudinal fiber bundles 10 and 10 is twisted by 180 degrees alternately in the forward and reverse directions by the rotating device 3, and is located at an intermediate position where the longitudinal fiber bundles 10 and 10 are adjacent to each other and has a constant length q from the rod feeding direction z perpendicular to the traveling direction s. The fiber-reinforced plastic rod 9 is fed by the rod feeding device 8 with a timing p so as to form an interval p to form a square lattice-like body, and then fed into the curing furnace 4 under tension by a pair of upper and lower drive rollers 6. It is heated and hardened, and it is moved to the advancing direction s while being gripped by the square plate-shaped pressurizable gripper 5 across the entire width direction, and is cut to a certain length by the cutter 7 that moves while rotating in the direction perpendicular to the advancing direction s. Lattice-like reinforcement substrate 11 shown in FIG. 3 by Rukoto is obtained. In order to obtain the lattice-like reinforcing base material 11 shown in FIG. 4, the longitudinal fiber bundles 10 and 10 are arranged at a constant interval n, and the longitudinal fiber bundles 10 and 10 are twisted by a rotating device 3 in an alternating order of 360 degrees. Therefore, the fiber-reinforced plastic rod 9 can be fed from the rod supply device 8 with a timing so as to be spaced by m, and the others can be manufactured by the same manufacturing method as described with reference to FIG.

With reference to FIG. 2, the rotating device 3 which is the main operation in the method of manufacturing the lattice-like reinforcing base material of the present invention will be described. The rotating device 3 has racks 13 and 13 arranged in parallel in a longitudinal direction at right angles to the traveling direction s and having a space above and below, and a plurality of pinions 12 and 12 at equal intervals p (at least desired). Of the vertical muscle fiber bundles 10 and 10), the upper rack 13 is horizontally moved in the rack reciprocating direction x, and the lower rack 13 is horizontally moved in the rack reciprocating direction y.
Reciprocating movements are made possible by the operation of drive cylinders (not shown) that are connected to the racks 13 and 13 at opposite ends, and circular openings are formed in the pinions 12 and 12 at their peripheral portions symmetrically with respect to the center. 15 and 15 are provided (only one is shown around the pinion 12 and the others are omitted). The twisting operation of the longitudinal muscle fiber bundle by the rotating device 3 will be described. As described above, the pair of uncured longitudinal muscle fiber bundles 10 and 10 impregnated with the resin in the impregnation tank 2 respectively have the opening portions 15, Although the vertical muscle fiber bundles are passed through 15 to be drawn out in the direction w, the racks 13 and 13 reciprocate in opposite rack reciprocating directions x and y, respectively, so that the pinion 12 reciprocates the racks 13 and 13. The longitudinal muscle fiber bundles 10 and 10 are twisted by an angle corresponding to the rotation angle of the pinion 12 by alternately rotating in the forward and reverse directions in the pinion rotation direction r. In this case, the number of teeth of the racks 13 and 13 and the reciprocating distance of the racks 13 and 13 are set so that the rotation angle of the pinion 12 is an integral multiple of 180 degrees. The fiber-reinforced plastic rods 9 having a constant length q from the rod supply direction z are aligned at the adjacent twist crossing intermediate positions of the longitudinal muscle fiber bundles 10 and 10 fiber bundles by the rod supply device 8 at intervals p. To form a square lattice.

In FIG. 5, the plate-like body 19 has upper and lower reinforcing layers 16 and 17, and the grid-like reinforcing base material 11 shown in FIG. 16, 1
It is obtained by filling resin concrete 18 between 7 and pressure molding. In this case, the longitudinal fiber bundles 10 and 10 and the rod 9
Since the intersecting portions 14 and 14 with and are inflated, the grid-like reinforcing base material 11 and the lower reinforcing layer 17 are in direct contact only at the intersecting portions 14 and 14, and the flat lower reinforcing layer 17 Since voids can be held between them, impregnation is possible even when resin concrete having high viscosity is used, and the voids 18a and 18b are sufficiently filled.

[Example 1] 440 at a speed of 1 m / min
A vertical fiber bundle consisting of three glass fiber rovings at 0 tex is arranged in parallel at an interval of 10 cm and sent to an impregnation tank to be impregnated with polyester resin. The glass fiber reinforced polyester resin rod with a diameter of 5 mm and a circular cross section and a total length of 100 cm was sent in a direction orthogonal to each other by twisting 180 degrees alternately every second to form a grid-like body, which was then sent to a curing furnace by a conventional method. Heat-cured, a fixed length of 100c in the direction of travel
Cut into m, and formed into a square lattice with a width of 10 cm and a length of 10 cm.
The grid-like reinforcing base material shown in FIG. 3 in cm was obtained.

[Example 2] 80 at a speed of 0.5 m / min
Longitudinal muscle fiber bundles made of 20 carbon fiber rovings are arranged in parallel at intervals of 10 cm and sent to an impregnation tank to be impregnated with epoxy resin. The rod made of carbon fiber reinforced epoxy resin with a diameter of 5 mm and a circular cross section of 100 cm in length is orthogonally crossed while twisting 360 degrees alternately every second, to form a grid-like body, which is then sent to a curing furnace by a conventional method. Heat-cured, a certain length of 200 in the direction of travel
Cut into cm and formed into a rectangular grid with a width of 10 cm and a length of 20 cm.
0 cm of the grid-like reinforcing base material shown in FIG. 4 was obtained.

[Example 3] 600 g / upper and lower reinforcing layers
m ² glass fiber mats are arranged with a space between each layer,
The grid-like reinforcing base material shown in Example 1 is placed on the lower reinforcing layer, and the upper and lower reinforcing layers are filled with resin concrete made of polyester resin, sand, a curing agent, an internal mold release agent, calcium carbonate, clay and the like. And pressure-molded to obtain a plate-like body having a thickness of 23 mm. This plate-shaped body shows no difference in breaking strength as compared with the one using a conventional woven glass fiber fabric with a perforated surface, but the defective rate due to swelling is 30% to 1%.
% Improved.

[0016]

EFFECTS OF THE INVENTION According to the lattice-like reinforcing base material of the present invention, no collapse occurs, the matrix having a high viscosity is sufficiently impregnated, and the plate-shaped body obtained by pressure molding hardly swells. The defect rate is also low. According to the method for manufacturing a lattice-like reinforcing base material of the present invention, the lattice-like reinforcing base material can be efficiently and continuously produced.

[Brief description of drawings]

FIG. 1 is an example of a schematic manufacturing process diagram according to a method for manufacturing a lattice-like reinforcing base material of the present invention, and is a side view (a) and a plan view (b).

FIG. 2 is a schematic side view of an essential part of an example of a rotating device used in the method for manufacturing a lattice-like reinforcing base material of the present invention.

FIG. 3 is a partially enlarged schematic view of an example of the lattice-like reinforcing base material of the present invention, and is a side view (a) and a plan view (b).

FIG. 4 is a partially enlarged schematic view of another example of the lattice-like reinforcing base material of the present invention, and is a side view (a) and a plan view (b).

5 is a partially enlarged cross-sectional view of an example of a plate-like body using the lattice-like reinforcing base material of the present invention shown in FIG.

[Explanation of symbols]

 1 Fiber Bundle Stand 2 Impregnation Tank 3 Rotating Device 4 Curing Furnace 5 Gripper 6 Driving Roller 7 Cutter 8 Rod Feeding Device 9 Rod 10 Longitudinal Fiber Bundle 11 Lattice Reinforcing Base 12 Pinion 13 Rack 14 Intersection 15 Opening 16 Top Reinforcement layer 17 Lower reinforcement layer 18, 18a, 18b Resin concrete 19 Plate-like body m Distance between rods n Distance between longitudinal fiber bundles p Distance between rod, vertical fiber bundles and pinion q Constant length r Pinion rotation direction s Travel direction w Longitudinal muscle fiber bundle sending direction x, y Rack reciprocating direction z Rod feeding direction

Claims (3)

[Claims] 1. A longitudinal fiber bundle containing a pair of thermosetting impregnated resins twisted in an alternating multiple of 180 degrees in parallel and in a reverse sequence at regular intervals, at an intermediate position between adjacent twist intersections. Fiber-reinforced plastic rods of a fixed length orthogonal to the longitudinal fiber bundles are arranged in a grid at intervals, the rods are fixed by the longitudinal fiber bundles, and the intersections of the longitudinal fiber bundles and the rods are A lattice-like reinforcing base material characterized by being expanded. 2. A pair of uncured longitudinal muscle fiber bundles are pulled out in parallel at regular intervals under tension and impregnated with a thermosetting resin, and the longitudinal muscle fiber bundles are alternated in an order of 180 degrees in an inverse manner. While twisting twice, a fiber-reinforced plastic rod of a certain length is fed at a distance from the direction perpendicular to the advancing direction of the longitudinal fiber bundles to the adjacent twist intersection midpoints of the longitudinal fiber bundles at intervals to form a grid-like body. The method for producing a lattice-like reinforcing base material according to claim 1, which is characterized by comprising: after forming the above, heat-curing, and cutting into a constant length in the traveling direction. 3. A plate-like body in which resin concrete is filled and solidified between upper and lower reinforcing layers, and the grid-like reinforcing base material according to claim 1 is disposed on at least the lower reinforcing layer. Shape.