KR20170011707A - Fiber Reinforcing Bands Prevented from Being Damaged by Filled-up Material and Manufacturing Method thereof - Google Patents

Abstract

The present invention relates to a structure of a fiber reinforcing material capable of preventing damage to the fiber reinforcing material caused by compacting a backfilling material by covering a polyurea synthetic resin protecting the fiber reinforcing material on a top surface or a top surface and a bottom surface of the fiber reinforcing material to reinforce the fiber reinforcing material and to a manufacturing method thereof. The fiber reinforcing material includes: multiple fiber core materials (10) formed to be separated from each other; a synthetic resin covering material (20) covering the multiple fiber core materials to be embedded; and a reinforcing layer (30) formed in a part outer than the covering material (20). The reinforcing material (30) includes the polyurea synthetic resin. The materials of the covering material (20) and the reinforcing layer (30) are different. Accordingly, the present invention provides the fiber reinforcing material wherein the reinforcing layer (30) is formed to be separated from the covering material (20). In addition, the present invention provides the manufacturing method of the fiber reinforcing material including: a step of extruding and covering the covering material (20) made of the synthetic resin on the multiple fiber core materials (10); a step of forming the reinforcing layer (30) by coating the polyurea synthetic resin wherein a main agent (71) and a hardening agent (72) are mixed on the covering material (20).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber reinforcing material capable of preventing fiber reinforcement damage caused by an embankment,

The present invention relates to a reinforcing material used for a reinforced earth retaining wall, and more particularly, to a reinforcing material used for reinforcing earth retaining walls, and more particularly, to a reinforcing material for protecting a fiber reinforcing material on an upper surface or an upper surface of a fiber reinforcing material to prevent breakage of a fiber reinforcing material caused by compaction of a back filling material The present invention relates to a structure of a fiber reinforcing material and a method of manufacturing the same.

The reinforced soil structure is generally composed of a reinforcing material, a pacing member, and a backfill material (filler). The reinforcing material is the most important component in the reinforced soil structure and forms the reinforcing soil of the gravity type retaining wall concept by interaction with the backfill material. These stiffeners are installed in the soil with a density based on the thrust of the soil which is reacted by the stress acting on the structure and the friction between the soil-stiffener.

Considering the durability and workability of the reinforced soil, sandy soil with a low silt or clay content is considered to be suitable for embankment used for backfilling of reinforced earth retaining wall. However, in the field, there are various backfill materials besides sandy soil.

Depending on the durability of the reinforcement, the range of backfill materials that can be used can vary greatly. For example, the better the workability of the reinforcement material, the wider the range of backfill materials that can be used.

Generally, a bonded type geogrid in which a polyester (PET) fiber yarn is arranged in a net shape and coated with PVC is a structure in which a fiber yarn is dip-coated in a dispersed state, and a coating layer is thin and a yarn is dispersed , A fiber reinforcing material in the form of polyethylene (PE) covering a plurality of polyester (PET) fiber yarn bundles arranged side by side, while being easily damaged due to impact and having a relatively small and smooth backfilling material, It is possible to use the backfill material having a relatively larger particle size than the geogrids because it is stronger than the geogrids due to the impact, and the application range of the backfill material is further improved It can be said that it is wide.

That is, in the case of geogrid, since the width and thickness of the rib in the direction of the yarn is small, and the coating is also thin, the possibility of damaging the yarn during the application of the reinforcing soil and the tensile strength of the reinforcing material due to such damage are likely to decrease , Fiber reinforcing material (such as "FOLDLOCK" product of HANPHOUS CO., LTD.), The width of the reinforcing material is as wide as 70 mm, and the covering material can be coated thickly so that the possibility of damaging the yarn during construction can be greatly reduced. The possibility of reducing the tensile strength of the stiffener can be greatly reduced. Thus, the thickness of the cladding material is closely related to the prevention of damage to the fiber reinforcement.

For example, in the case of a reinforcing material having a large diameter and a hard backfill material such as an amber stone or an amber buckle, a covering material covering a bundle of fiber yarns such as a fiber reinforcing material such as a "FOLDLOCK", rather than a geogrid-like reinforcing material, It can be said that the effect of reducing the tensile strength loss is small because the tensile strength reduction factor is small due to the small damage of the reinforcing fiber. Conversely, this means that a relatively wide variety of backfill materials can be utilized.

On the other hand, backfill materials are mainly used in the field when constructing embankment. There is no major problem in the case that the material in such a site is made of relatively small-diameter gravels. However, when the material of the site is composed mainly of rock such as gravel, amber stone, rock burr, etc., do.

That is, in the case where a fiber reinforcing material is laid on the upper surface of the reinforced soil material up to a certain height and a backfill material is laid on the fiber reinforcing material, when the backfill material is mixed with a lot of gravel, Whereby the covering material and the fiber core of the fiber reinforcing material are broken. If the fiber reinforcement is broken, the tensile strength of the fiber reinforcement is reduced, and the fiber reinforcement is likely to break without being able to withstand the earth pressure originally designed.

Thus, a fiber reinforcing material in which a reinforcing member is integrally attached to the surface of a covering material of a fiber reinforcing material and a manufacturing method thereof have been proposed. However, this increases the manufacturing cost of the fiber reinforcing material and raises the overall construction cost. The stainless steel mesh, nonwoven fabric, and high strength yarn proposed in the present invention can not sufficiently absorb the impact applied to the fiber reinforcement when the rock mixed with the backfill material is consolidated or transmit the impact to the fiber reinforcement material as it is. It may be worse than not being used or rather not using it.

In addition, the above-described method of manufacturing a reinforcing member requires a triple injection mold and can not selectively form a reinforcing member on the surface of the covering material. Therefore, a fiber reinforcing member having a reinforcing member integrally attached to the surface of the covering member, The fiber reinforcements omitting the members must be produced at different facilities.

Therefore, when the fiber reinforcing material is manufactured by the above method, it is difficult to apply the fiber reinforcing material because it is necessary to use an expensive fiber reinforcing material even when it is not necessary to consider the breakage of the fiber reinforcing material due to the impact, .

However, when two types of fiber reinforcing materials are produced, the cost of equipment investment is high and it is a kind of redundant investment.

Next, if the folding groove portion of the fiber reinforcing member formed with the folding groove at the center is formed of a reinforcing member rather than a covering member, there is a problem that it is very difficult to fold the fiber reinforcing member in half. Particularly, although the folding grooves are not required to have large rigidity, it is not a waste to construct them by the reinforcing members. The breakage of the folding grooves does not have a significant effect on the stiffness of the fiber reinforcement.

The larger the amount of the core material to be embedded in the fiber reinforcing material, the thicker the fiber reinforcing material. In order to fold the thickened fiber reinforcing material, the width of the folding groove must be increased. It becomes a factor of rising.

Patent Registration No. 1534541 Patent Registration No. 0913423

It is an object of the present invention to provide a fiber reinforcing material structure reinforcing a fiber reinforcing material at a low cost without impairing the self-function of the fiber reinforcing material.

It is another object of the present invention to provide a method for simply fabricating such a fiber reinforcing material.

In order to solve the above-described problems, the present invention provides a manufacturing method of a semiconductor device comprising: a plurality of fiber core members 10 formed to be spaced apart from each other; A synthetic resin covering material (20) for covering and embedding the plurality of fiber core materials; And a reinforcing layer 30 formed on the outer layer than the covering material 20 and the reinforcing layer 30 comprises polyurea resin and the materials of the covering material 20 and the reinforcing layer 30 are different from each other, Wherein the reinforcing layer (30) is formed separately from the layer of the covering material (20).

A folding groove 22 having a reduced thickness is formed at the center of the fiber reinforcing member so that the fiber reinforcing member can be folded with a half width along the longitudinal direction. The folding groove 22 can be formed from the covering member 20. The reinforcing layer 30 may not be formed in the folding groove 22.

The reinforcing layer 30 may be formed on at least one of the upper surface and the lower surface of the covering material 20. [

A concavo-convex portion may be formed on the surface of the covering material 20. [

Or a concavo-convex portion may be formed on the surface of the reinforcing layer 30.

Or concavo-convex portions may be formed on the surface of the covering material 20 and the reinforcing layer 30, respectively.

The present invention also provides a method for producing a fiber reinforcing material, comprising the steps of: extruding and covering a plurality of fiber core materials (10) with a synthetic resin covering material (20); And forming a reinforcing layer (30) by coating a polyurea resin obtained by mixing a main body (71) and a curing agent (72) on the covering material (20).

Here, before coating the polyurea resin on the covering material 20 coated with the fiber core material, the concave-convex portion can be formed on the surface of the covering material.

Alternatively, the reinforcing layer 30 may be formed on the covering material 20, and the convexo-concave portion may be formed on the surface of the reinforcing layer 30 after the touch-drying time of the polyurea resin of the reinforcing layer has elapsed.

Here, before the polyurea resin is coated on the covering material 20 coated with the fiber core material, the folding groove 22 may be formed by pressing the center portion of the covering material in the longitudinal direction.

According to the present invention, even when gravel or rock is contained in the backfilled material, it is possible to prevent breakage of the fiber reinforcing material, thereby ensuring the stability of the embankment.

Further, according to the present invention, it is possible to reduce the thickness of the fiber reinforcing material while increasing the strength of the fiber reinforcing material, so that the folding resistance can be prevented from increasing and the production cost can be reduced.

In addition, according to the present invention, mixed production is possible, so that a fiber reinforcing material having a reinforcing layer formed by one facility and a fiber reinforcing material having no reinforcing layer can be manufactured, and a fiber reinforcing material suitable for a work site can be produced with one facility.

The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

1 is a perspective view showing a first embodiment of a fiber reinforcing material according to the present invention,
Figure 2 is a cross-sectional view of the fiber reinforcement of Figure 1,
3 is a perspective view showing a second embodiment of the fiber reinforcing material according to the present invention,
4 is a perspective view showing a third embodiment of the fiber reinforcement according to the present invention,
5 is a perspective view showing a fourth embodiment of the fiber reinforcing material according to the present invention,
6 is a perspective view showing a fifth embodiment of the fiber reinforcing member according to the present invention,
7 is a schematic view showing an embodiment of a method for manufacturing a fiber reinforcing material according to the present invention,
8 is a sectional view taken along the line AA in Fig. 7,
9 is a sectional view taken along the line BB of Fig. 7,
10 is a cross-sectional view taken along the line CC of Fig. 7,
11 is a DD sectional view of Fig. 7,
12 is a schematic view showing another embodiment of a method of manufacturing a fiber reinforcing material according to the present invention,
13 is a sectional view taken along the line AA of Fig. 12,
Fig. 14 is a sectional view taken along line BB of Fig. 12,
Figure 15 is a cross-sectional view taken along the line CC of Figure 12, and
16 is a DD sectional view of Fig.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

It is to be understood that the present invention is not limited to the disclosed embodiments, but may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to inform.

≪ Embodiment 1 >

FIG. 1 is a perspective view showing a first embodiment of a fiber reinforcing material according to the present invention, and FIG. 2 is a sectional view of the fiber reinforcing material of FIG. 1.

As shown in the figure, the fiber reinforcement according to the present invention includes a plurality of fiber core members 10, which are made up of thousands of strands of microfine fiber bundles, and are embedded in the cladding member 20. Where the fiber core 10 is polyester and the covering 20 is polyethylene. The fiber reinforcing material having the polyester fiber core material 10 covered with the polyethylene covering material 20 has a considerably high tensile strength. However, the ratio of the gravel, the zeolite, and the burrs to the backfill material used when the reinforcing material is applied The fiber core material may be damaged as the cover material is damaged, and such damage causes the tensile strength of the fiber reinforcing material to be lowered.

The present invention is further characterized in that a reinforcing layer 30 made of a polyurea material is further formed on the covering material 20 of the fiber reinforcing material.

The polyurea resin is a reaction product of an isocyanate with a polyether having a primary amine at the terminal, and polyetheramine is used as a raw material. This resin is 100% solids and has no volatile components at all, so that it is not necessary to treat volatile organic compounds (VOCs) in the manufacturing process, and it can be manufactured by mixing the main component of the isocyanate component with the curing agent of the mixed amine component and curing.

Since the polyurea resin uses a primary amine, the polyurea resin has a high reactivity and curing rate without using a catalyst, has a uniform reactivity, and is not significantly affected by changes in humidity and temperature. Therefore, (Temperature or humidity of the product to be attached) is hardly controlled (manufacturing temperature: -40 to + 135 ° C). Particularly, a mixed amine prepared from a chain extender having an amine group at the terminal and an amine group at the terminal thereof, and a polyurea resin prepared from an isocyanate prepolymer as a raw material have a very fast reaction speed and a fast curing type. Therefore, when the quick-setting curing type polyurea resin is used through the adjustment of the components, it is possible to manufacture without delaying the manufacturing time or the process, and reinforcement work for the fiber reinforcing material is possible.

Moreover, since the polyurea resin has excellent adhesion to various adherends such as iron plate, aluminum, concrete, etc., when the surface of the fiber reinforcing material is reinforced with polyurea resin, the reinforcing layer can be integrated without falling off from the fiber reinforcing material. Since the polyurea resin has good stretchability and can be elastically deformed, the fiber reinforcing material reinforced with the polyurea resin can be adhered very closely to the backfill material of the reinforcing material in contact with the polyurea resin, thereby maximizing the frictional force with the embankment.

Above all, polyurea resin has excellent mechanical properties under extreme conditions and durability over a long period of time. Therefore, polyurea resin is an optimum material for reinforcing fiber reinforcement. That is, since the polyurea resin is very excellent in stretch ratio, impact resistance and abrasion resistance, it has a very excellent effect of reinforcing fiber reinforcing materials that are impacted by gravel or rocks contained in backfill materials.

In addition, since the polyurea resin has a stable chemical structure that is hardly influenced by acid, base, temperature, humidity, pressure, and the like, the polyurea resin stably adheres to the fiber reinforcing material Lt; / RTI >

The reinforcing layer 30 formed of such a polyurea resin is formed on the outer layer of the covering material 20 and may be formed on the upper and lower surfaces of the covering material 20 as shown in FIG. In other words, the reinforcing layer 30 protects the fiber core 10 and prevents the fiber core 10 from being damaged. The impact of the gravel or rock contained in the backfill material on the fiber reinforcing material is generated in the vertical direction, It is not necessary to form the reinforcing layer 30 on the side surface of the covering material 20.

Next, a folding groove 22 is formed in the middle of the covering material 20 as shown in FIG. 1, where the folding groove 22 is a portion that becomes a folding line when the fiber reinforcing material is folded in the longitudinal direction by half width . Also, since the portion of the folding groove 22 is not a portion that exhibits tensile strength, it is not that the folding groove of the fiber reinforcing material embedded in the embankment layer is damaged during the process of constructing the reinforcing soil material, nor does it affect the tensile strength of the fiber reinforcing material. Therefore, it is preferable that the portion of the folding groove 22 is formed as flexible as possible so as to facilitate folding of the fiber reinforcing member with a half width. For this reason, the reinforcing layer 30 is not formed in the folding groove 22 in the present invention.

Since the conventional method of reinforcing fiber reinforced materials is inevitably manufactured by extruding a polyethylene resin which is a thermoplastic resin in a heated state, it is necessary to prevent the reinforcing portion from being formed on the side surface of the covering material, or to prevent the reinforcing portion from being formed in the folding groove portion Impossible, and this is a waste of material.

However, since the polyurea resin used as the material of the reinforcing layer in the present invention is a thermosetting resin, the resin is produced by a chemical reaction between the hardening agent and the subject, not the heat. Therefore, only the upper and lower surfaces of the covering material 20, The reinforcing layer 30 can be formed.

According to this type of fiber reinforcement, the portion of the folding groove 22 can maintain the maximum flexibility property, so that the folding process of the fiber reinforcement can be smoothly performed, and a reinforcing layer is formed on both sides of the fiber reinforcement, So that the unit cost can be lowered.

In addition, although it is possible to consider protecting the fiber core material 10 by forming only the covering material 20 thick, if the covering material is made too thick, the cost of the fiber reinforcing material may be increased and the fiber reinforcing material may become thick have. In order to prevent such a phenomenon, it may be considered to make the width of the folding groove 22 wider. However, as the width of the folding groove becomes wider, the thickness of the folding groove must also be secured to some extent. . On the other hand, when the reinforcing layer 30 made of a polyurea material having a higher abrasion resistance and impact resistance than the polyethylene mainly used as the material of the covering material is coated as in the present invention, the thickness of the covering material 20 is made thinner and the thickness of the fiber reinforcing material as a whole It is possible to further reduce the unit cost of the fiber reinforcing material and to easily fold the fiber reinforcing material. In addition, the fiber reinforcing material having such a structure maintains the tensile strength of the fiber reinforcing material to minimize the damage even if the reinforcing material is formed together with the backfill material composed of the arm burr, thereby more firmly supporting the reinforcing soil.

≪ Embodiment 2 >

3 is a perspective view showing a second embodiment of the fiber reinforcement according to the present invention.

In contrast to the first embodiment, the fiber reinforcing material of the second embodiment is characterized in that the reinforcing layer 30 is formed only on the upper surface of the covering material 20. [ Since the reinforcing layer 30 is made of polyurea, which is a thermosetting resin, it can be selectively formed on only one side of the covering member 20.

When the fiber reinforcing material is laid on the embankment layer built up to a certain height in the course of the construction of the reinforcing soil, the portion of the embankment layer already subjected to the compaction process is relatively uniform, so that even if it is pressed onto the fiber reinforcing material, Likelihood is relatively low. Therefore, the reinforcement layer 30 is not formed on the bottom portion of the fiber reinforcing material which is already facing on the embankment layer which has already been leveled and compaction is secured, and only the reinforcing layer 30 is formed on the upper surface of the fiber reinforcement, .

Such a structure can reduce the thickness of the fiber reinforcing material, thereby lowering the unit cost and making it easier for the operator to fold the fiber reinforcing material during the construction process and lower the unit cost.

≪ Third Embodiment >

4 is a perspective view showing a third embodiment of the fiber reinforcement according to the present invention.

In contrast to the first embodiment, the fiber reinforcing member of the third embodiment is characterized in that the reinforcing layer 30 is formed not only on the upper and lower surfaces of the covering member 20 but also on the folding grooves 22. Polyurea, which is a material of the reinforcing layer 30, has a very high expansion / contraction ratio when compared with polyethylene, so that even when the reinforcing layer 30 is formed on the folding groove 22, the polyurea does not act as a large resistance when the operator folds the folding groove It is worth noting that.

Such a structure is advantageous in that the reinforcing layer 30 is formed on the entire surface of the covering material including the folding grooves 22 rather than the manufacturing equipment or the unit cost required for not forming the reinforcing layer 30 on the folding grooves 22 If it is cheaper than equipment or unit price, it can show its advantage. Further, since the reinforcing layer 30 is formed, the thickness of the folding groove 22 made of the same material as that of the covering material 20 can be further reduced.

<Fourth Embodiment>

5 is a perspective view showing a fourth embodiment of the fiber reinforcement according to the present invention.

In contrast to the first embodiment, the fiber reinforcing member of the fourth embodiment may be a structure without the folding grooves 22. [ That is, the reinforcing layer 30 of the polyurea material of the present invention can be applied not only to the fiber reinforcing material having the folding grooves but also to the fiber reinforcing material having no folding grooves. Even with such a structure, the thickness of the covering material 20 can be made thinner by the reinforcing layer 30 and the thickness of the fiber reinforcing material as a whole can be made thinner, so that the unit cost of the fiber reinforcing material can be further reduced and the folding operation of the fiber reinforcing material is facilitated It becomes. Also, the fiber reinforcing material having such a structure also minimizes the damage even if the reinforcing material is formed together with the backfill material composed of the arm burr, thereby maintaining the tensile strength of the fiber reinforcing material, thereby supporting the reinforcing material as a whole more firmly.

<Fifth Embodiment>

6 is a perspective view showing a fifth embodiment of the fiber reinforcement according to the present invention.

Compared with the fourth embodiment, the fifth embodiment differs from the fourth embodiment in that the reinforcing layer 30 is formed only on the upper surface of the covering material 20. [ As described above in connection with the second embodiment, by forming the reinforcing layer 30 only on the upper surface of the fiber reinforcing material, which is more desperately required for reinforcement when the fiber reinforcing material is applied, the thickness of the fiber reinforcing material can be reduced, .

It is apparent that the reinforcing layer 30 of the polyurea material of the present invention can be applied not only to the fiber reinforcing materials like the first to fifth embodiments of the fiber reinforcing materials described above but also to various other fiber reinforcing materials. The covering material 20 and the fiber core material 10 can be reinforced without increasing the folding resistance when the reinforcing layer 30 of the present invention is formed except for the folding groove portion. The effect of various kinds of the present invention described above such that the total thickness of the fiber reinforcing material can be reduced by further reducing the thickness of the reinforcing layer 20 of the present invention can be realized even when the reinforcing layer 30 of the present invention is applied to other types of fiber reinforcing materials It should be noted.

&Lt; Fabrication method of fiber reinforcing material &

7 is a schematic view showing one embodiment of a method for producing a fiber reinforcing material according to the present invention, Fig. 8 is a sectional view taken along the line AA in Fig. 7, Fig. 9 is a sectional view taken along line BB in Fig. 7, Is a DD sectional view of Fig.

First, the fiber core material 10 and the raw material 29 of the covering material are introduced into the extrusion apparatus 40, and the raw material 29 is melted and extruded to cover the fiber core material 10. The raw material 29 of the covering material is fed through a hopper in the form of granules having a diameter of 2 to 3 mm and the granular material is heated to about 170 degrees Celsius by a heater in the extruding device and pressurized through a screw, Is extruded while wrapping the fiber core material (10) put into the extrusion device (40). Therefore, the fiber reinforcement from the extrusion apparatus 40 is in the state shown in Fig.

The above-mentioned polyurea resin is prepared by mixing a base and a curing agent. After mixing the base and the curing agent, the polyurea resin becomes a quick cure. The quick-setting polyurea is toughened for about 30 seconds to 1 minute, and the touch-drying time is affected by the temperature. That is, the polyurea resin can be manufactured at a temperature range of about -40 to + 135 ° C., and the higher the temperature, the faster the toughening time becomes.

Meanwhile, considering that the temperature of the coating material 20 extruded from the extrusion apparatus 40 is about 160 ° C., the extrusion apparatus 40 (40) The temperature of the coating material 20 and the temperature of the reinforcing layer 30 can be equilibrated at about 110 ° C. When the coating material 20 is coated with the polyurea resin mixed with the base material and the hardener, (If the temperature of the coating material is too high, the fluidity is high, and if the temperature is too low, the coating material is solidified to some extent and the strength is generated, so that it is difficult to mold the concave-convex portion) In the case of urea, the chemical reaction becomes more active at this temperature, and the toughening time can be further shortened.

On the other hand, in order to form the concave and convex portions on the cover material 20 and the reinforcing layer 30, the surface of the covering material 20 and the reinforcing layer 30 should be pressed by the convex and concave forming rollers 50 having the convex and concave portions. Therefore, the use of the concave / convex forming roller 50 for the reinforcing layer 30 should be performed after the polyurea touch-drying time of the reinforcing layer 30 has elapsed. Further, after the reinforcing layer 30 is completely cured, it is difficult to form a specific shape by pressing with a roller or the like. Therefore, the forming of the convexo-concave portion should be performed before the hardening and drying time of the reinforcing layer 30 with respect to the polyurea resin.

In the manufacturing process of the present invention, since the polyurea resin maintains a relatively high temperature state at room temperature, the curing drying time can be shortened to about 10 to 30 minutes.

Therefore, as shown in FIG. 7, it is possible to coat the reinforcing layer 30 on the cover material 20 of FIG. 9 extruded from the extrusion apparatus 40 as shown in FIG. The thickness of the reinforcing layer 30 may be around 1 mm.

The method of forming the reinforcing layer 30 may be various, but it is possible to use both the Pour gun, the spray gun method, and the nozzle method. The stored subject 71 and the curing agent 72 are conveyed by a transfer pump and heated to about 70 DEG C by a preliminary heater while being conveyed and mixed at the impingement mixing nozzle 73, And the bottom surface. 10, the reinforcing layer 30 may be formed on the upper and lower surfaces of the cover 20 except for the portion where the folding groove 22 is to be formed, as shown in FIG. 10, ) Can be formed. Of course, it is also possible to adjust the shape of the nozzle so as to cover the folding groove portion. In addition, since the impact mixing nozzles 73 are all provided on the upper and lower portions of the fiber reinforcing member, it is also possible to form a reinforcing layer only on the upper layer of the covering member 20 by operating only the impingement mixing nozzle 73 at the upper portion. Further, when it is not necessary to coat the reinforcing layer 30 at all, the reinforcing layer forming apparatus 70 itself need not be operated.

After the reinforcing layer is coated, the folding groove 22 is formed by pressing the intermediate portion of the fiber reinforcing material with the folding groove forming roller 60 as shown in FIG. 7 (see FIG. 11) The outer surface of the reinforcing layer 30 is pressed to form the concave and convex portions. According to this manufacturing procedure, the concave-convex portion can be formed in the reinforcing layer 30. [ It goes without saying that it is of course possible to change the order and to perform the forming of the concave-convex portion first and the forming of the folding groove later.

After the process shown in Fig. 7 is finished, the fiber reinforcement is cooled and wound.

According to the above-described manufacturing method, it is possible to manufacture the fiber reinforcing material of the present invention by merely adding the reinforcing layer forming device 70 in the middle without adding a large change to the existing fiber reinforcing material producing device, 70) according to the use and partial use, a fiber reinforcing material in which a reinforcing layer is formed on the upper and lower surfaces, a fiber reinforcing material in which only a reinforcing layer is formed on the upper surface, and a fiber reinforcing material in which no reinforcing layer is formed.

5 and FIG. 6 can be fabricated in the same manner on the above-described principle by omitting the folding groove forming roller 60. FIG.

12 is a schematic view showing another embodiment of the method for manufacturing a fiber reinforcement according to the present invention, Fig. 13 is a sectional view taken along the line AA in Fig. 12, Fig. 14 is a sectional view taken along line BB in Fig. 12, 16 is a DD sectional view of Fig.

Hereinafter, another embodiment of the method for manufacturing the fiber reinforcing member will be described. Compared with the manufacturing apparatus shown in FIG. 7, the manufacturing apparatus shown in FIG. 12 differs in that the reinforcing layer forming apparatus 70 is disposed behind the concave / convex forming rollers 50.

When the fiber core material 10 of Fig. 13 and the raw material 29 of the cover material are put into the extruding device 40 and then extruded, the result is shown in Fig.

In this state, when the concave-convex forming roller 50 and the folding groove forming roller 60 are passed, the state shown in Fig. 15 is obtained. When the folding groove is pressed by the folding groove forming roller 60, the width of the fiber reinforcing material tends to be slightly wider. Therefore, it is preferable that the irregular portion forming roller 50 and the folding groove forming roller 60 are separately formed.

In this state, the reinforcing layer 30 is formed on the upper and lower surfaces of the covering material 20 through the reinforcing layer forming apparatus 70. The surface shape of the reinforcing layer is also formed to some degree irregularities corresponding to the shape of the concave-convex portion on the surface of the covering material 20 when the reinforcing layer 30 is formed on the upper and lower surfaces of the covering material 20. The reinforcing layer 30 may be formed on the upper and lower surfaces of the covering material through the coating roller since the reinforcing layer 30 is coated after the folding groove 22 is formed in the covering material 20. In this case, 22) the reinforcing layer is not coated naturally on the surface. It should be understood that the reinforcing layer forming apparatus may be embodied in other forms as necessary.

After the process shown in Fig. 12 is completed, the fiber reinforcement is cooled and wound. Of course, the winding of the fiber reinforcement is carried out at least after the toughening time of the reinforcing layer has elapsed.

The position of the reinforcing layer forming apparatus is not limited to the position shown in FIG. 7 or 12, and it is needless to say that a proper position can be selected in accordance with the characteristics of the polyurea resin used as the material of the reinforcing layer. For example, the reinforcing layer forming apparatus may be disposed at a position before cooling after the fiber reinforcement is wound.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the invention is not limited to the disclosed exemplary embodiments. It is obvious that a transformation can be made. Although the embodiments of the present invention have been described in detail above, the effects of the present invention are not explicitly described and described, but it is needless to say that the effects that can be predicted by the configurations should also be recognized.

10: fiber core material
20: Cover material
22: Folding groove
29: Raw materials
30: reinforced layer
40: Extrusion device
50: forming roller
60: Folding groove forming roller
70: reinforcement layer forming device
71: Topics
72: Hardener
73: Impact mixing nozzle

Claims (9)

A plurality of fiber core members 10 spaced apart from each other;
A synthetic resin covering material (20) for covering and embedding the plurality of fiber core materials; And
And a reinforcing layer (30) formed on the outer layer than the covering material (20)
The reinforcing layer 30 includes polyurea resin and the material of the covering material 20 and the reinforcing layer 30 are different from each other so that the reinforcing layer 30 is generated separately from the layer of the covering material 20. [ Fiber reinforcement.
The method according to claim 1,
A folding groove 22 having a thin thickness is formed at a central portion of the fiber reinforcing member so that the fiber reinforcing member can be folded with a half width along the longitudinal direction.
Characterized in that the folding grooves (22) are formed from a covering material (20).
The method according to claim 1,
Wherein the reinforcing layer (30) is formed on at least one of the upper surface and the lower surface of the covering material (20).
The method of claim 2,
Wherein the reinforcing layer (30) is not formed in the folding groove (22).
The method according to claim 1,
Wherein the surface of the cover material (20) or the surface of the reinforcing layer (30), or the surface of the cover material (20) and the surface of the reinforcing layer (30) are provided with concave and convex portions.
A method of manufacturing a fiber reinforcing material according to any one of claims 1 to 5,
Coating a plurality of fiber core members (10) with a synthetic resin covering material (20) by extrusion molding; And
And forming a reinforcing layer (30) by coating a polyurea resin obtained by mixing a main body (71) and a hardener (72) on the covering material (20).
The method of claim 6,
A method for manufacturing a fiber reinforcing material, comprising the steps of: forming a concave-convex portion on a surface of a covering material before coating a polyurea resin on the covering material (20) coated with the fiber core material.
The method of claim 6,
Wherein a reinforcing layer (30) is formed on the covering material (20), and a concave / convex portion is formed on the surface of the reinforcing layer (30) after the touch dry time of the polyurea resin of the reinforcing layer has elapsed.
The method of claim 6,
Wherein the folding groove (22) is formed by pressing the center portion of the covering material in the longitudinal direction before coating the polyurea resin on the covering material (20) coated with the fiber core material.

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