JPH11348160A - FIBER REINFORCED BASE AND PROCESS FOR PRODUCING THE SAME, FIBER REINFORCED MATERIAL AND PROCESS FOR PRODUCING THE SAME - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fiber reinforced base material having greatly increased strength, a reliable and easy method for producing the same, a fiber reinforced material containing the fiber reinforced substrate, and a reliable and easy method for producing the same. provide. SOLUTION: A fiber reinforced base material 11 is provided in a gap 15 between a warp 13 and a weft 14 in a state where the woven fabric 12 is laminated.
The flocking fiber 16 is obtained by electrostatic flocking in a direction substantially perpendicular to the plane formed by the fiber. Further, a knitted fabric can be used instead of the woven fabric 12. It is most preferable to use carbon fibers having an aspect ratio of 10 to 2500 as the flocking fibers 16. The fiber reinforced material is a material obtained by pouring a raw material to be a matrix in a state where the fiber reinforced base material 11 is contained in the raw material. As this raw material, a synthetic resin such as an epoxy resin, cement or a metal can be used, but it is preferable to use an epoxy resin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber reinforced material containing a woven or knitted fiber as a reinforcing material in a matrix of synthetic resin, metal, concrete, etc., a method for producing the same, and reinforcement of the fiber reinforced material. The present invention relates to a fiber reinforced base material and a method for producing the same.

[0002]

2. Description of the Related Art Glass fiber reinforced plastics (FRP) using a glass fiber as a reinforcing material and a synthetic resin as a matrix are conventionally known as this kind of fiber reinforced material. This FRP is a very light one because it contains a laminate of glass fiber woven or knitted fabric as a reinforcing material in the matrix.
High strength can be maintained.

[0003]

However, the conventional fiber reinforced material has a high strength in a direction of a surface formed by a woven or knitted fabric used as a reinforcing material, but has a high strength in a direction intersecting the direction. Not very expensive. That is, if the fiber reinforced material cracks in parallel with the plane of the reinforcing material, the layers of the woven or knitted fabric are simply laminated, and the bonding force between the layers is weak, so that the layers of the woven or knitted fabric are laminated. Along, and the 180 ° peel strength was low.

[0004] The present invention has been made by focusing on the problems existing in the prior art as described above. An object of the present invention is to provide a fiber reinforced base material having greatly increased strength and a reliable and easy manufacturing method thereof, and a fiber reinforced material containing the fiber reinforced base material and a reliable and easy manufacturing method thereof. It is in.

[0005]

According to a first aspect of the present invention, there is provided a fiber-reinforced base material comprising a woven fabric or a knitted fabric formed in a gap between yarns in a state where a woven fabric or a knitted fabric is laminated. It is provided with a flocking fiber extending in a direction intersecting the surface.

[0006] In the fiber-reinforced base material according to the second aspect, the flocked fiber according to the first aspect is a carbon fiber. In the method for producing a fiber-reinforced base material according to claim 3, a flocked fiber of a predetermined length is sieved and arranged on one electrode of an electrostatic flocking apparatus, and a woven or knitted fabric is laminated and adhered to the back side thereof. After forming a layer and arranging it on the other electrode of the electrostatic flocking device, a predetermined voltage is applied between the two electrodes, and the flocking fiber is placed in the gap between the yarns of the woven fabric or knit, and the surface formed by the woven or knitted fabric. The hair is implanted so as to extend in the direction intersecting with.

[0007] A fiber reinforced material according to a fourth aspect is obtained by containing the fiber reinforced base material according to the first or second aspect in a raw material and curing the material. In the method for producing a fiber-reinforced material according to claim 5, after arranging the fiber-reinforced base material according to claim 1 or 2 in the raw material, the raw material is mixed with the fiber-reinforced base material in the raw material. It is to be cured.

[0008]

Embodiments of the present invention will be described below in detail. As shown in FIG. 1, the fiber-reinforced base material 11 is laminated so that the gap 15 between the warp 13 and the weft 14 of the woven fabric 12 is aligned and the gap 15 between the two threads 13 and 14 is formed.
And the woven fabric 12
Is formed by forming an adhesive layer 17 on the back surface and bonding the flocking fibers 16 to the back surface. FIG. 1 shows the woven fabric 12, but the same applies to a knitted fabric instead. Therefore, the structure and effect of the woven fabric 12 described below are the same for the knitted fabric. Further, the fiber reinforced material 18 is obtained by curing the fiber reinforced base material 11 by incorporating the fiber reinforced base material 11 into a raw material serving as a matrix.

The woven fabric 12 constituting the fiber reinforced substrate 11 is
It is formed so as to form a gap 15 between the warp 13 and the weft 14 through which the flocking fiber 16 can penetrate.
As in the case of a shaft fabric, the direction of the surface of the fabric 12 is
What is molded so that high strength can be maintained is preferred. As the fiber constituting the woven fabric 12, a fiber which is not broken or melted in the process of casting the raw material serving as the matrix to form the fiber reinforced material 18 is used.
Examples of such fibers include heat-resistant fibers such as carbon fibers and aramid fibers, and ceramic fibers.

As the flocking fiber 16, any fiber capable of electrostatic flocking can be used, but like the fiber of the woven fabric 12, it is broken or melted in the process of forming the fiber reinforced material 18. What does not do is used. further,
As the flocking fiber 16, it is preferable to use a conductive fiber since electric charges need to be accumulated during electrostatic flocking. Examples of the conductive fiber include a carbon fiber and a metal fiber, and it is most preferable to use a carbon fiber which has high conductivity and is lightweight. When carbon fiber is used as the flocking fiber 16, the specific gravity is often smaller than that of the matrix material, so that the gap 15 between the yarns 13 and 14 of the woven fabric 12 is filled with the matrix material. Thus, it is possible to reduce the weight of the fiber reinforced material 18.

When using non-conductive fibers, it is necessary to perform an electrodeposition treatment in advance. This electrodeposition process is a process of coating the surface of the flocking fiber 16 with a thin film containing a conductive substance such as sodium silicate having a property of conducting electricity so that the electric resistance is reduced and electricity flows on the fiber surface. This is performed by a known method. The leakage resistance of the electrodeposited flocking fiber 16 is preferably 1 to 1 ×.
10 ¹⁰ Ω, more preferably 1 × 10 ³ to 1 × 10 ⁹ Ω
It is. It is technically difficult to make the leakage resistance of the flocking fiber 16 less than 1Ω. On the contrary, when it exceeds 1 × 10 ¹⁰ Ω, the electrostatic flocking is not efficiently performed.

The flocking fibers 16 are planted in a direction intersecting the plane formed by the fabric 12, and the fiber reinforced base material 1 in that direction.
It is desirable that the length penetrates the entirety and does not protrude. In addition, the above-mentioned intersecting direction is the normal woven fabric 1
Although it is a direction perpendicular to the plane formed by the two, it may be a direction inclined at a predetermined angle. That is, each yarn 13 of the woven fabric 12,
The gap 15 between 14 may be slightly shifted.

Further, the flocking fiber 16 is 0.5 to 5 mm.
Is desirable. If the length of the flocking fiber 16 is less than 0.5 mm, it is difficult to locally accumulate electric charges in the flocking fiber 16, electrostatic flocking is not efficiently performed, and a direction intersecting the surface formed by the fabric 12. Cannot withstand the force applied to Conversely, if the distance exceeds 5 mm, it is necessary to increase the distance between the electrodes in order to give a sufficient flying force to the flocking fiber 16 during electrostatic flocking, but in that case, it is necessary to apply a high voltage and it is economical. Not.

The aspect ratio of the flocking fiber 16 is 1
It is desirably 0 to 2500. If the aspect ratio is less than 10, it becomes difficult to accumulate electric charges locally in the flocking fiber 16, and electrostatic flocking is not performed efficiently. Conversely 2
If it exceeds 500, the cut flocking fibers 16 are easily entangled when sieving, forming a floc on the sieve, resulting in poor handling and an increase in the proportion of the flocking fibers 16 that do not pass through the sieve. The yield is bad.

Further, it is desirable that the flocking fiber 16 has a thickness of 0.6 to 20 denier. This flocking fiber 16
If the thickness is less than 0.6 denier, it is not economical because the handling becomes poor. Conversely, if it exceeds 20 denier,
Since the flocking fiber 16 itself becomes heavy, the efficiency of electrostatic flocking decreases.

The adhesive layer 17 is a thin layer formed by uniformly applying an adhesive to the back surface of the laminated fabric 12. As the adhesive, for example, an adhesive such as a rubber-based or acrylic-based adhesive can be used, but an adhesive which is not easily broken in the process of molding the fiber-reinforced material 18 by pouring a matrix material is preferably used. For example, an acrylic emulsion adhesive having heat resistance is preferably used. In addition, since both components have good compatibility, it is also possible to use an adhesive containing the same components as the raw material to be the matrix.

Since the fiber-reinforced material 18 uses the fiber-reinforced substrate 11 as a reinforcing material, it is preferable that the fiber-reinforced material 18 has the same size and shape as the size and shape of the fiber-reinforced substrate 11.
Further, as a raw material constituting the matrix of the fiber reinforced material 18, a thermosetting resin such as an epoxy resin, a thermoplastic resin, cement, or a metal can be appropriately selected and used depending on the purpose.

Next, a method for producing the fiber reinforced substrate 11 and the fiber reinforced material 18 will be described. First, as shown in FIG. 1, a woven fabric 12 formed into a sheet is laminated with a gap 15 between a warp 13 and a weft 14 and laminated, and an adhesive layer 17 is formed on the back surface thereof. The laminated body is produced by attaching a proper release film 19. After temporarily fixing the whole of the laminated body so as not to be easily displaced, the upper electrode plate 21 of the electrostatic flocking device 20 shown in FIG.
Then, the release film 19 is arranged so that the upper surface thereof is located.

On the other hand, the flocking fiber 16 having conductivity or the electrodeposited flocking fiber 16 is cut into a predetermined length and sieved, so that the flocking fiber 16 is uniformly dispersed on the lower electrode plate 22. At this time, the flocking fiber 16 having a high moisture content needs to be dried to a moisture content of 0.1 to 5% before electrostatic flocking. It is technically difficult to dry the water content of the flocking fiber 16 to less than 0.1%. Conversely, when the water content exceeds 5%, the leakage resistance of the flocking fiber 16 increases,
The efficiency of electrostatic flocking decreases.

Furthermore, in the process of sieving the flocking fiber 16, the looseness may be deteriorated due to the relationship between the length of the flocking fiber 16 and the water content. It is desirable to dry the product until the water content reaches 0.1 to 5% and then to sieve it. When the water content exceeds 5%, the flocking fibers 16 are easily entangled with each other, so that the handling becomes poor.

On the other hand, the flocking fiber 16 having a length of 2 to 5 mm
Is desirably sieved with a water content of 5 to 30%, dispersed on the lower electrode plate 22, and dried as it is. When the water content is less than 5%, the flocking fibers 16 are easily entangled with each other, so that the handling becomes poor. Conversely, if it exceeds 30%, the surfaces of the flocking fibers 16 will adsorb to each other and it will be difficult to pass through the sieve.

Thereafter, the lower electrode plate 22 is used as a positive electrode and the upper electrode plate 21 is used as a negative electrode, and
When a predetermined voltage is applied between the two, negative charges are accumulated on the surface of the fabric 12 and the top of the flocking fibers 16 dispersed in the lower electrode plate 22, in substantially the same manner as when a voltage is applied to the capacitor. A positive charge is accumulated.

The predetermined voltage is mainly applied to both electrode plates 2.
The distance is determined by the distance between the fibers 1 and 22, the length of the flocking fiber 16 and the humidity of the electrostatic flocking device 20, preferably 1 × 10 ⁴ to 1 × 10 ⁵ V, more preferably 1.
It is performed in the range of 5 × 10 ^{4 to} 7 × 10 ⁴ V. When this voltage is less than 1 × 10 ⁴ V, electrostatic flocking is not performed efficiently because the electrostatic force generated by the electric field between the two electrode plates 21 and 22 is small. On the other hand, when the voltage exceeds 1 × 10 ⁵ V, the electrostatic force is too large, and it is difficult to uniformly implant the hair.

Since the voltage is applied so that the electrostatic force generated by the electric field between the two electrode plates 21 and 22 exceeds the gravity applied to the flocking fiber 16, the flocking fiber existing on the lower electrode plate 22 As shown in FIG. 2, the uppermost fiber 16 of the 16 moves vertically upward toward the fabric 12 while maintaining the direction of the fiber 16 in the vertical direction. And the flocking fiber 16 that was able to move through the gap 15 between each of the yarns 13 and 14 of the woven fabric 12,
It collides with the adhesive layer 17 and is adhered.

The fiber-reinforced base material 11 planted as described above
The adhesive layer 17 is dried by an ordinary method as needed. At this time, the lowermost fabric 12 and the flocking fiber 16 are
The parts are firmly fixed to each other via the part adhered to the adhesive layer 17. Thereafter, the surface of the fiber-reinforced base material 11 is not adhered by brushing, suction, or the like.
Is removed to complete the fiber reinforced substrate 11.

As shown in FIG. 3, a fiber reinforced material 18 made of a synthetic resin is placed between a lower iron plate 24 and an upper iron plate 25 heated to a predetermined temperature of a hot press machine 23 in order from the bottom such as a Teflon sheet. The release film 19 which can be peeled off, the fiber reinforced base material 11 released from the temporary fixing state and the spacers 26 on both sides thereof, an excessive amount of molten synthetic resin, a perforated film 27, and a part for absorbing excess synthetic resin The glass cloth 28 and the release film 19 are laminated and molded while being pressed. Further, the fiber reinforced material 18 made of a thermosetting resin is heated simultaneously with pressurization when being molded by the hot press machine 23, so that the strength of the fiber reinforced material 18 can be further increased.

The molten synthetic resin is supplied to a hot press 23
When the fiber reinforced material 18 is formed by
And it is impregnated in the gaps present therein and hardens. Therefore, in the cured fiber-reinforced base material 11, the fibers that are in contact with each other are hard and fixed, and are not easily shifted not only in the direction of the surface of the fabric 12 but also in the direction intersecting the surface. When molding the fiber reinforced material 18, the fiber reinforced base material 11 and the synthetic resin poured into the fiber reinforced base material 11 form spacers 26.
Is regulated by the thickness of the upper and lower iron plates 24 and 25, and is molded as a molded article having the same thickness as the spacer 26. At that time, an excess amount of the synthetic resin is absorbed by the glass cloth 28 through the holes of the perforated film 27.

On the other hand, fiber reinforced material 18 made of cement
In the method, the cement is poured so as to contain the fiber reinforced base material 11 and left as it is, thereby hardening the cement to be the matrix. In addition, the fiber-reinforced material 18 made of a metal is poured into a heated and melted metal so as to contain the fiber-reinforced base material 11 made of a fiber having high heat resistance such as a ceramic fiber, and cooled to be a raw material that becomes a matrix. To cure.

Next, the effects exerted by the fiber reinforced base material 11 and the method for producing the same, and the fiber reinforced material 18 and the method for producing the same will be described. According to the fiber-reinforced base material 11 of the embodiment, the gap 15 between the warp 13 and the weft 14 of the fabric 12 is laminated together and the flocking fiber 16 is provided in the gap 15 between both the threads 13, 14, thereby forming the fabric. The fiber reinforced material 18 having high strength can be manufactured not only in the direction of the surface 12 but also in the direction intersecting the surface. According to the fiber reinforced substrate 11 of the embodiment, by forming the adhesive layer 17 on the back surface of the laminated fabric 12,
The flocking fiber 16 can be planted so as to penetrate the entire layer of the laminated fabric 12. According to the fiber reinforced base material 11 of the embodiment, by using the woven fabric 12 in which the gap 15 is formed between the warp 13 and the weft 14, the flocking fiber 16 is implanted so as to penetrate the entire layer of the woven fabric 12. be able to. -According to the fiber reinforced base material 11 of the embodiment, the flocking fiber 1
By using carbon fibers as 6, the electrostatic flocking can be reliably performed. In addition, since carbon fibers are often lower in specific gravity than the raw material serving as the matrix,
The weight of the fiber reinforced material 18 can be reduced as compared with the case where the gap 15 between the two yarns 13 and 14 of the woven fabric 12 is filled with a raw material serving as a matrix. -According to the fiber reinforced base material 11 of the embodiment, the flocking fiber 1
By setting the length of 6 to 0.5 to 5 mm, electrostatic flocking can be reliably performed. Further, by setting the aspect ratio of the flocking fiber 16 to 10 to 2500, the yield when the flocking fiber 16 is sieved can be improved, and electrostatic flocking can be reliably performed. In addition, by setting the thickness of the flocking fiber 16 to 0.6 to 20 denier, the loosening can be improved and the electrostatic flocking can be reliably performed. According to the fiber reinforced material 18 of the embodiment, by including the fiber reinforced base material 11 as a reinforcing material, the woven fabric 12
In addition to the direction of the plane formed, a high strength can be obtained in the direction intersecting the plane. -According to the fiber reinforced material 18 of the embodiment, since a synthetic resin, cement, or metal can be used as a raw material serving as a matrix, it can be used for various applications. According to the fiber reinforced material 18 of the embodiment, the raw material serving as the matrix is impregnated into the gap between the woven fabric 12 and the flocking fiber 16 and hardened, so that the woven fabric 12 and the flocking fiber 16 are firmly fixed. Thus, very high strength can be maintained. According to the fiber reinforced material 18 of the embodiment, the use of a thermosetting resin as a raw material serving as a matrix and the use of carbon fibers as the fibers constituting the woven fabric 12 and the flocking fibers 16 provide a lightweight yet strong strength. Can be very high. Further, it can be used for applications such as aerospace materials. According to the method for manufacturing the fiber-reinforced substrate 11 of the embodiment,
By carrying out electrostatic flocking of the flocking fiber 16, the fiber-reinforced base material 11 can be manufactured reliably and easily. According to the fiber reinforced material 18 of the embodiment, the fiber reinforced base material 11 in which the long flocking fibers 16 are planted contains the fiber reinforced base material 11 so that the strength can be increased and the thickness can be increased. it can. According to the method for manufacturing the fiber-reinforced substrate 11 of the embodiment,
A flocked fiber 16 having a length of 0.5 to 2 mm has a moisture content of 0.
By sieving after drying to 1 to 5%, it is possible to improve the yield and increase the yield, and also to allow the manufacturing process to proceed smoothly. On the other hand,
5 mm length of the flocking fiber 16 is sieved in a state of a water content of 5 to 30% to be dispersed on the lower electrode plate 22 and dried as it is to improve the handling and increase the yield. And the manufacturing process can proceed smoothly.

[0030]

EXAMPLES Examples of the above embodiment will be described below. (Example 1) Carbon fiber (Trayka T300 manufactured by Toray Industries, Inc.)
-1000, 0.6 denier) was woven at a weaving speed of 30 rpm using a triaxial loom (TWM32C manufactured by Toyawa Kogyo Co., Ltd.) to produce eight carbon fiber triaxial woven fabrics 12. Next, the warp 13 of the eight carbon fiber triaxial fabrics 12 is used.
And the gap 15 between the weft 14 and
A carbon fiber fabric laminate in which the Teflon sheet 19 was sandwiched between the half surfaces of the central layer was produced.

On the back surface of the carbon fiber fabric laminate, 700
Bar coating with epoxy resin adhesive with a thickness of μm,
After bonding the Teflon sheet 19 to the back surface,
The whole laminate is temporarily fixed with an adhesive tape, and the electrostatic flocking device 20 is used.
Of the upper electrode plate 21 of FIG. The epoxy resin adhesive used here was 100 parts by weight of bisphenol A type epoxy resin (Epicoat 828 manufactured by Yuka Shell Epoxy Co., Ltd.) as a main agent, and methylnadic anhydride (Nippon Kayaku) as a curing agent. 80 parts by weight of Kayahard MCD manufactured by K.K.
5 tris (dimethylaminomethyl) phenol (Daitoclar HD-acc-43 manufactured by Daito Sangyo Co., Ltd.)
It is a mixture of parts by weight.

On the other hand, sufficiently dried carbon fibers 16
(Treca T300-1000 manufactured by Toray Industries, Inc.) was cut into a length of 1 mm with a tow cutter, passed through a 20-mesh mesh sieve, and uniformly spread on the lower electrode plate 22 of the electrostatic flocking device 20 shown in FIG. Was dispersed. The upper electrode plate 21 is a minus electrode, the lower electrode plate 22 is a plus electrode, and the distance between the electrodes is 1
The voltage was set to 0 cm, and a voltage of 30 kV was applied for 180 seconds to perform electrostatic flocking. Thereafter, the epoxy resin adhesive is cured by heating at 150 ° C. for 2 hours, and further suctioned by a brush-shaped suction port of a vacuum cleaner (commercially available) to remove the non-adhered flocking fiber 16 and to remove the fiber-reinforced base material. 11 were produced.

Next, the hot press machine 23 shown in FIG.
Teflon sheet 19 on the lower iron plate 24 in order from the bottom,
The fiber reinforced base material 11 released from the temporarily fixed state and the 1 mm spacer 26, the molten epoxy resin adhesive, the perforated film 27, the glass cloth 28, and the Teflon sheet 19 were laminated on both sides thereof. 980 kPa in this state
(10 kg / cm ² ), hot pressing was performed under the conditions of 150 ° C., and then allowed to cool to cure the epoxy resin adhesive, thereby producing the fiber reinforced material 18. (Comparative Example 1) A fiber reinforced material 18 was produced in the same manner as in Example 1 except that eight carbon fiber woven fabric laminates in which the flocking fibers 16 were not electrostatically florated were used. (180 ° Peeling Strength Test) As shown in FIG. 4, it was inserted into a triaxial woven fabric layer of the fiber reinforced material 18 of Example 1 and Comparative Example 1 cut into a flat plate (length 15 cm × width 2.5 cm). The removed Teflon sheet 19 was removed, and a notch of about 1 mm was made in the depth of the tear with a cutter. Each part of the fiber reinforced material 18 above and below the breach is provided with a bolt 2
One end of the hinge 31 was fixed using the nut 9 and the nut 30, and the other end was fixed to an autograph strength measuring instrument. Then, a force was applied in the direction of the arrow in FIG. 4 at a speed of 50 mm per minute, and the peel strength (gf) was measured. The results are shown in FIG.

FIG. 5 (a) shows that the fiber reinforced material 18 of Example 1 had about twice the peel strength as compared with the fiber reinforced material 18 of Comparative Example 1. (Example 2) A fiber-reinforced material 18 was produced in the same manner as in Example 1 except that four carbon fiber woven fabric laminates were used. However, in Example 1, the Teflon sheet 19 was not inserted into the central layer of the carbon fiber fabric laminate. (Comparative Example 2) A fiber-reinforced material 18 was produced in the same manner as in Example 2, except that the flocking fiber 16 was not subjected to electrostatic flocking. (Tensile strength test) Flat (15cm long x 2.5c wide)
m) The fiber reinforced material 1 of Example 2 and Comparative Example 2 cut into
8. Fix both ends in the length direction to an autograph strength measuring instrument and pull in the opposite direction at a speed of 20 mm per minute.
The tensile strength (kg / mm ² ) and strain (%) were measured. The results are shown in FIG.

From the results shown in FIG. 5B, the fiber reinforced material 18 of Example 2 is three times smaller than the fiber reinforced material 18 of Comparative Example 2.
It was shown that the tensile strength was as high as about 0%. (Comparison of Driving Weight and Microscopic Observation) Fiber Reinforced Substrates 11 of Examples 1 and 2 and Comparative Examples 1 and 2
And the cross section of the fiber reinforced material 18 of Example 1 and Example 2 cut along the layer of the triaxial woven fabric was observed using an optical microscope.

As a result, the fiber-reinforced base material 11 of Example 1 or 2 was replaced with the fiber-reinforced base material 1 of Comparative Example 1 or Comparative Example 2.
As a whole, an increase in weight of about 1 to 2 g is observed, and when converted to carbon fibers having a length of 1 mm and a thickness of 0.6 denier, approximately 15 million carbon fibers and about 50,000 carbon fibers per 1 cm ² are obtained. It means that the hair was planted. Example 1
And the cross section of the fiber reinforced material 18 of Example 2 is 3
It was found that carbon fibers were implanted at high density throughout the gap 15 between the warp 13 and the weft 14 of the shaft fabric.

Next, the technical ideas that can be grasped from the above embodiment will be described below. The fiber reinforced material according to claim 4, wherein the raw material is a thermosetting resin. With this configuration, the strength of the fiber reinforced material can be significantly increased, and the weight can be reduced. The method for producing a fiber-reinforced substrate according to claim 3, wherein the flocked fiber has an aspect ratio of 10 to 2500.

With this configuration, it is possible to more reliably manufacture a fiber-reinforced base material capable of greatly increasing the strength of the fiber-reinforced material. The water content of the flocking fiber before electrostatic flocking is 0.1 to
The method for producing a fiber-reinforced substrate according to claim 3, wherein the content is 5%.

With this configuration, it is possible to reliably and easily manufacture a fiber-reinforced base material capable of greatly increasing the strength of the fiber-reinforced material. -A flocked fiber having a length of 0.5 to 2 mm and a water content of 0.1 to 5% is sieved and placed on one electrode of the electrostatic flocking apparatus, and a woven or knitted fabric is laminated and placed on the back side. After forming an adhesive layer and arranging it on the other electrode of the electrostatic flocking device, a predetermined voltage is applied between the two electrodes, and the flocking fibers are formed in the gaps between the yarns of the woven or knitted fabric. A method for producing a fiber-reinforced substrate in which hair is implanted so as to extend in a direction intersecting with a surface.

With such a configuration, it is possible to reliably and easily manufacture a fiber-reinforced base material capable of greatly increasing the strength of the fiber-reinforced material.・ A flocked fiber having a length of 2 to 5 mm and a water content of 5 to 30% is sieved and placed on one electrode of the electrostatic flocking device until the water content becomes 0.1 to 5% as it is. After drying and laminating a woven or knitted fabric, forming an adhesive layer on the back side and arranging it on the other electrode of the electrostatic flocking device, a predetermined voltage is applied between the two electrodes, and the flocking fiber is woven. Alternatively, a method for producing a fiber-reinforced base material in which hairs are implanted in gaps between yarns of a knitted fabric so as to extend in a direction intersecting with a surface formed by the woven or knitted fabric.

With this configuration, it is possible to reliably and easily manufacture a fiber reinforced base material capable of greatly increasing the strength of the fiber reinforced material.

[0042]

The present invention is configured as described above, and has the following effects. According to the fiber-reinforced base material of the first aspect, the strength of the fiber-reinforced material can be greatly increased.

According to the fiber-reinforced base material of the second aspect,
In addition to the effects of the first aspect, the strength of the fiber reinforced material can be further increased. According to the method for manufacturing a fiber-reinforced substrate according to the third aspect, a fiber-reinforced substrate capable of greatly increasing the strength of the fiber-reinforced material can be reliably and easily manufactured.

According to the fiber reinforced material of the fourth aspect,
The strength can be greatly increased. According to the method for manufacturing a fiber reinforced material according to the fifth aspect, a fiber reinforced material capable of greatly increasing strength can be reliably and easily manufactured.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a fiber reinforced base material of an embodiment.

FIG. 2 is a sectional view showing the operation of the electrostatic flocking device of the embodiment.

FIG. 3 is an exploded front view showing the hot press according to the embodiment.

FIG. 4 is a front view showing a method of a 180 ° peel strength test of Example 1.

5 (a) is a graph showing the results of a 180 ° peel strength test of Example 1, and FIG. 5 (b) is a graph showing the results of a tensile strength and strain test of Example 2.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 ... Fiber reinforced base material, 12 ... Woven fabric or knitted fabric, 13, 14 ... Warp and weft as each thread, 15 ... Gap, 16 ... Flocked fiber, 17 ... Adhesive layer, 18 ... Fiber reinforced material, 20 ... Electrostatic flocking device, 21 ... upper electrode plate as the other electrode, 22 ... lower electrode plate as one electrode.

Claims (5)

[Claims] 1. A fiber reinforced base material comprising a flocking fiber extending in a direction intersecting a surface formed by a woven or knitted material in a gap between each yarn in a state where the woven or knitted material is laminated. 2. The flocked fiber is a carbon fiber.
The fiber-reinforced base material according to item 1. 3. A flocking fiber of a predetermined length is sieved and arranged on one electrode of the electrostatic flocking device, and a woven or knitted fabric is laminated and an adhesive layer is formed on the back side of the fabric flocking device. After arranging on the other electrode, a predetermined voltage is applied between both electrodes, and the flocking fiber is placed in the gap between each yarn of the woven or knitted fabric,
A method for producing a fiber-reinforced substrate in which hairs are planted so as to extend in a direction intersecting with a surface formed by a woven or knitted fabric. 4. A fiber reinforced material obtained by containing the fiber reinforced base material according to claim 1 in a raw material and curing the material. 5. A method for producing a fiber reinforced material, comprising: arranging the fiber reinforced base material according to claim 1 or 2 in the raw material, and then curing the raw material while the fiber reinforced base material is contained in the raw material.