JP2001310393A - Method for producing fabric for frp and method for producing prepreg for frp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology excellent in practicability and productivity which can easily obtain a lengthy diagonal thread fabric for a large FRP product. SOLUTION: In a method for producing a fabric for FRP, a mandrel 1 which can move in the axial direction is inserted into a braider 2 having a diagonal thread supply part 3 which is formed to supply diagonal threads S onto the peripheral surface of the mandrel 1 at a prescribed angle ±θ to the axis of the mandrel 1, the diagonal threads S are supplied from the supply part 3 to weave a cylindrical fabric 4 on the peripheral surface of the mandrel 1, and the cylindrical fabric 4 is cut in the axial direction of the mandrel 1, producing the lengthy fabric 5 in which the diagonal threads S are arranged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for producing a fiber woven fabric for FRP and a method for producing a prepreg for FRP.

[0002]

2. Description of the Related Art FRP
(Fiber reinforced resin) For example, a product is prepared by applying, impregnating, and pressing an epoxy resin on a woven fabric of carbon fiber to obtain a prepreg, and polymerizing, pressing, deforming,
It is manufactured by cutting and processing into a predetermined thickness and shape.

[0003] By the way, when a plurality of prepregs are polymerized so that the formed product exhibits a certain strength in all directions as much as possible, as shown in FIG. The prepreg obtained from the warp weft fiber fabric 9 in which the warp and the weft are arranged in the 90 ° direction, and the oblique yarn fiber fabric 5 in which the warp and the weft are arranged in the 45 ° oblique direction. It is manufactured by a method of alternately polymerizing prepregs (the same components as those in the example are denoted by the same reference numerals).

FIG. 1 shows a configuration in which two warp weft fiber fabrics 9 and two oblique yarn fiber fabrics 5 are laminated, and the warp weft fiber fabric 9 and the two oblique yarn fiber fabrics 5 are laminated. A method of arranging the axial yarn R in order to increase the strength of the prepreg in a predetermined direction is illustrated. ).

However, the manufacturing method of this FPR product includes:
There are the following problems.

That is, very large FPR products, for example,
In the case of manufacturing a large FPR product having a length of 6 m, the diagonal yarn fiber fabric 5 also needs to have a length of 5 to 6 m. Is extremely cumbersome to manufacture.

More specifically, as shown in FIG. 2, the oblique yarn fiber fabric 5 is formed by cutting a warp weft fiber fabric 9 woven by a known weaving machine at an angle of 45 °. ing. Therefore, in order to obtain a bidirectional fiber fabric 5 having a length of 6 m, a warp weft fiber fabric 9 having a length and width of at least about 4.3 m is required. However, such a warp weft fiber woven fabric 9 having a long width direction cannot be woven by a weaving machine of a system in which weft yarn is blown by an air jet or a water jet during weaving. Another weaving machine has a problem that the weaving speed is slow and the production cost is high.

Therefore, conventionally, the usually woven width 2 m
A method of manufacturing an oblique yarn fiber fabric 5 having a predetermined length by joining spliced yarn fiber fabrics having a length of about 2.5 m obtained by cutting the warp weft yarn fabrics 9 at an angle of 45 ° is adopted. However, in the case of this method, there is a problem that the strength of the joint portion is low.

The present invention solves the above problems,
An object of the present invention is to provide a technique excellent in practicality and productivity that can easily obtain a long slanted thread fiber woven fabric used for a very large FRP product.

[0010]

The gist of the present invention will be described with reference to the accompanying drawings.

A method for producing a fiber woven fabric for FRP,
The mandrel 1 which is movable in the axial direction is inserted into the braider 2 having the oblique thread supply section 3, and the oblique thread supply section 3
The oblique thread S is supplied on the outer peripheral surface of the mandrel 1 at a predetermined angle ± θ with respect to the axis of the mandrel 1,
A plurality of diagonal yarns S are supplied from the diagonal yarn supply unit 3 to weave a tubular fabric 4 on the outer peripheral surface of the mandrel 1.
The tubular woven fabric 4 is cut open in the axial direction of the mandrel 1, and the long oblique yarn fiber woven fabric 5 on which the plurality of oblique yarns S are disposed
And a method for producing a fiber woven fabric for FRP.

Further, in the method for producing a fiber woven fabric for FRP according to the first aspect, a known round striker is adopted as the known braider 2.
The present invention relates to a method for producing a fiber woven fabric for P.

A method of manufacturing a fiber woven fabric for FRP, comprising inserting a mandrel 1 movable in the axial direction into a braider 2 having a diagonal yarn supply unit 3, the diagonal yarn supply unit 3 comprising: The oblique thread S is provided on the outer peripheral surface of the mandrel 1 at a predetermined angle ± θ with respect to the axis of the mandrel 1, and is arranged on one side of the braider 2 in the direction of the axis of the mandrel 1. Axial yarn supply section 6 for supplying an axial yarn R
And a plurality of axial yarns R from the axial yarn supply section 6 are provided.
Is supplied onto the outer peripheral surface of the mandrel 1 and a plurality of diagonal threads S are supplied from the diagonal
By weaving the tubular woven fabric 4 on the outer peripheral surface, a polymerized tubular woven fabric 7 in which the axial yarn R and the tubular woven fabric 4 are superimposed is woven, and then the polymerized tubular woven fabric 7 is mandreled. (1) manufacturing a long diagonal thread fiber woven fabric with an axial thread, in which the plurality of diagonal threads S are disposed by being cut open in the axial direction and the axial thread R is disposed in a longitudinal direction; The present invention relates to a method for producing a fiber woven fabric for FRP, characterized by the following.

Further, in the method for producing a fiber woven fabric for FRP according to the third aspect, a known round hitting braider is adopted as the known braider 2.
The present invention relates to a method for producing a fiber woven fabric for P.

Further, in a method of manufacturing a prepreg for an FRP, a mandrel 1 movable in the axial direction is inserted into a braider 2 having an oblique thread supply section 3, and the oblique thread supply section 3 comprises a mandrel. 1 is configured to supply the oblique thread S at a predetermined angle ± θ with respect to the axis of the mandrel 1 on the outer peripheral surface of the mandrel 1, and the unsynthesized state or the semi-cured state is formed on the outer peripheral surface of the mandrel 1. A resin layer is provided, a plurality of diagonal yarns S are supplied from the diagonal yarn supply section 3 on the first synthetic resin layer, and a tubular fabric 4 is woven on the outer peripheral surface of the mandrel 1. An uncured or semi-cured second synthetic resin layer is provided on the outer peripheral surface of the tubular fabric 4, and then the first synthetic resin layer and the second synthetic resin layer are semi-cured to form the tubular fabric 4.
Then, the prepreg of the tubular fabric 4 is cut open in the axial direction of the mandrel 1 to prepare a prepreg of the long oblique thread fiber fabric 5 on which the plurality of oblique threads S are disposed. The present invention relates to a method for producing a prepreg for FRP, which is characterized by being produced.

A method of manufacturing a prepreg for FRP, comprising inserting a mandrel 1 movable in the axial direction into a braider 2 having a diagonal thread supply unit 3, wherein the diagonal thread supply unit 3 comprises a mandrel. The oblique thread S is supplied on the outer peripheral surface of the mandrel 1 at a predetermined angle ± θ with respect to the axis of the mandrel 1, and is arranged on one side of the braider 2 in the direction of the axis of the mandrel 1. An axial yarn supply section 6 for supplying an axial yarn R is provided, and an uncured or semi-cured first synthetic resin layer is provided on the outer peripheral surface of the mandrel 1, and the axial direction is provided on the first synthetic resin layer. A plurality of axial yarns R from the yarn supply unit 6
Is supplied onto the outer peripheral surface of the mandrel 1 and a plurality of diagonal threads S are supplied from the diagonal
By weaving the tubular fabric 4 on the outer peripheral surface of the tubular fabric 4, the polymerized tubular fabric 7 in which the axial yarn R and the tubular fabric 4 are superimposed is woven. An uncured or semi-cured second synthetic resin layer is provided on the surface, and then the first synthetic resin layer and the second synthetic resin layer are semi-cured to form a prepreg of the polymerized tubular fabric 7, Subsequently, the prepreg of the polymerized tubular fabric 7 is cut open in the axial direction of the mandrel 1, and the plurality of oblique yarns S are disposed, and the axial yarn R is disposed in the elongate direction. The present invention relates to a method for producing a prepreg for FRP, which comprises producing a prepreg of an oblique thread fiber woven fabric 8 with an axial thread.

Further, the oblique yarn fiber woven fabric 5 obtained by the method for producing a fiber woven fabric for FRP according to any one of claims 1 and 2, and the warp yarn and the weft yarn are woven by a known weaving machine. The formed warp weft fiber fabric 9 is polymerized,
The present invention relates to a method for producing a prepreg for FRP, wherein a prepreg is formed by applying and impregnating a synthetic resin to the polymer fiber 10.

Further, a prepreg is formed by applying and impregnating a synthetic resin to the diagonal fiber fabric 5 obtained by the method for producing a fiber fabric for FRP according to any one of claims 1 and 2. A prepreg is formed by applying and impregnating a synthetic resin to a warp weft fiber fabric 9 formed by weaving a warp and a weft by a known weaving machine, and a prepreg and a warp obtained from the oblique yarn fiber fabric 5. The present invention relates to a method for producing a prepreg for FRP, which comprises polymerizing a prepreg obtained from the weft fiber fabric 9 to form a polymerized prepreg.

An oblique yarn fiber woven fabric 8 with an axial yarn obtained by the method for producing a fiber woven fabric for FRP according to any one of claims 3 and 4, and a warp yarn and a weft yarn by a known weaving machine. A prepreg formed by polymerizing the warp weft fiber woven fabric 9 formed by weaving the woven fabric and applying and impregnating the synthetic fiber woven fabric 10 with a synthetic resin.
The present invention relates to a method for producing a prepreg for use.

The prepreg is formed by applying and impregnating a synthetic resin to the oblique yarn fiber woven fabric 8 with an axial yarn obtained by the method for producing a fiber woven fabric for FRP according to any one of claims 3 and 4. And a warp weft fiber fabric 9 formed by weaving warp and weft yarns by a known weaving machine.
A prepreg is formed by applying and impregnating a synthetic resin
A method for producing a prepreg for FRP, comprising polymerizing a prepreg obtained from the skewed fiber woven fabric 8 with an axial thread and a prepreg obtained from a warp weft fiber woven fabric 9 to form a polymerized prepreg. It is related.

[0021]

Operation and effect of the present invention Mandrel 1 and braider 2
(Sometimes referred to as a braiding machine), when the tubular fabric 4 is formed on the outer peripheral surface of the mandrel 1, the slant yarn S supplied from the slant yarn supply unit 3 of the braider 2 becomes a predetermined angle ± θ. Is obtained.

When the tubular fabric 4 is cut in the axial direction of the mandrel 1 and opened, a slanted yarn fiber fabric 5 having the slanted yarns S arranged diagonally is obtained.

Although the length of the diagonal yarn fiber fabric 5 is limited by the length of the mandrel 1, theoretically, an infinitely long tubular fabric 4 can be formed using an infinitely long mandrel 1. A very long diagonal fiber fabric 5 can also be produced.

The width of the diagonal fiber fabric 5 is limited by the diameter of the mandrel 1 and the size of the braider 2, but this can also be theoretically infinite. Fabric 5 can also be manufactured.

Since the present invention is as described above, it is possible to easily obtain a long slanted-fiber woven fabric or the like used for a very small FRP product. Become.

[0026]

3 to 5 show a first embodiment of the present invention.
6 and 7 show a second embodiment of the present invention, which will be described below.

The warp and weft fiber fabric 9 is woven by a normal weaving machine.

The oblique yarn fiber fabric 5 is woven by the method shown in FIGS. Hereinafter, a method for producing the oblique yarn fiber fabric 5 will be described in detail. In the present embodiment, the prepreg is obtained by applying and impregnating a synthetic resin to the oblique yarn fiber fabric 5 in the process of manufacturing the oblique yarn fiber fabric 5.

Reference numeral 1 denotes a mandrel 1 movable in the axial direction.

The mandrel 1 has a structure in which a plurality of divided mandrels 1a divided in the front-rear direction are joined. After moving in the axial direction, the foremost divided mandrel 1a is separated, and the divided mandrel 1a is separated. 1a is joined to the rear of the rearmost split mandrel 1a.

Reference numeral 2 denotes a braider 2, which is fitted on the mandrel 1.

The braider 2 employs a known so-called round striking braider (a plurality of bobbins are provided on a substrate, and half of the bobbins repeat meandering motion). Turn right,
The other half repeats a meandering motion and rotates counterclockwise. ). The oblique thread supply unit 3 that supplies the oblique thread S at a predetermined angle ± 45 ° with respect to the axis of the mandrel 1 is provided on the outer peripheral surface of the mandrel 1,
A plurality of diagonal yarns S are supplied from the diagonal yarn supply unit 3 onto the outer peripheral surface of the mandrel 1 moving in the axial direction so that the tubular fabric 4 is woven on the outer peripheral surface of the mandrel 1. (See FIG. 4, in the first embodiment, the bobbin is set as it is in the diagonal thread supply section 3).

Reference numeral 19 denotes a first resin tape 20 obtained by applying an uncured synthetic resin (epoxy resin, polyester resin, or the like) to a release paper 24 in a spiral manner around the outer peripheral surface of the mandrel 1. The first resin tape supply unit 19 that forms the first resin layer. This first resin tape 20 is made of release paper
24 is supplied in contact with the outer peripheral surface of the mandrel 1,
The tubular fabric 4 is woven on the first resin layer formed by the first resin tape 20.

Reference numeral 21 denotes a second resin tape 22 obtained by applying an uncured synthetic resin (epoxy resin, polyester resin, or the like) to a release paper 24 on the tubular fabric 4 on the outer peripheral surface of the mandrel 1. A second resin tape supply unit 21 that forms a second resin layer by being supplied and wound in a shape. The second resin tape 22 is supplied in a state where the synthetic resin side is in contact with the tubular fabric 4, and the tubular fabric 4 is provided with a first resin layer formed by the first resin tape 20 and a second resin tape. It is sandwiched by the second resin layer formed by 22 in a sandwich shape.

Reference numeral 37 denotes a semi-cured portion 37 for semi-curing the first resin layer and the second resin layer provided on the outer peripheral surface of the mandrel 1 by applying pressure. The tubular fabric 4 is provided with the semi-cured portion 37.
To form a cylindrical prepreg 29 coated and impregnated with a synthetic resin.

Reference numeral 38 denotes a cutting section 38 which cuts the cylindrical prepreg 29 in the axial direction by a cutting tool 30 such as a cutter and cuts the cylindrical prepreg 29 into a sheet. The cylindrical prepreg 29 passes through the cut portion 38 to become a prepreg 39 of the oblique yarn fiber fabric 5 to which a synthetic resin is applied and impregnated (see FIG. 5; the resin is omitted. There.)

Reference numeral 40 denotes a prepreg of the oblique yarn fiber fabric 5
A take-up section 40 for winding 39 from the outer peripheral surface of the mandrel 1 into a roller shape. Also, when the prepreg 39 of the diagonal yarn fiber fabric 5 is wound, the release paper 24 of the first resin tape 20 is configured to remain on the outer peripheral surface of the mandrel 1.

Reference numeral 23 denotes a release paper removing unit 23 for removing the release paper 24 of the first resin tape 20 remaining on the outer peripheral surface of the mandrel 1.

Reference numeral 25 denotes a support for the mandrel 1 and
The tip of the mandrel 1 (the foremost split mandrel 1a
The support fixing portion 25 is fixed to the front end portion of the supporting member. The movement of the mandrel 1 in the axial direction is achieved by pulling or pushing the support fixing portion 25.

Reference numeral 26 denotes a support for supporting the mandrel 1.
26. The support portions 26 are arbitrarily provided at predetermined intervals in order to always support the split mandrel 1a at two or more support points. The support 26 is not fixed to the mandrel 1.

Reference numeral 27 is connected to the support fixing portion 25,
A drive unit 27 that pulls or pushes the support fixing unit 25 to move the mandrel 1 in the axial direction.

Reference numeral 28 denotes a guide rail 28 for guiding the movement of the supporting and fixing portion 25.

According to this weaving apparatus, the mandrel 1 is moved in the axial direction by the drive unit 27, and the first resin tape 20 is supplied from the first resin tape supply unit 19 onto the outer peripheral surface of the mandrel 1. A first resin layer is provided, and the oblique yarn S supplied from the oblique yarn supply unit 3 of the braider 2 is supplied onto the first resin layer to woven a tubular fabric 4. The second prepreg 29 is manufactured on the outer peripheral surface of the mandrel 1 by supplying the second resin tape supply unit 21 to the second resin layer.

Subsequently, the tubular prepreg 29 is cut in the axial direction by a cutting tool 30 such as a cutter, and the tubular prepreg 29 is opened in a sheet shape, thereby forming a long and 45 ° yarn. The prepreg 29 of the diagonal yarn fiber fabric 5 arranged in the oblique direction is manufactured (if the first resin layer and the second resin layer are not provided, the diagonal yarn fiber fabric 5 is not provided).
Will be woven. ).

The prepreg 29 of the diagonal yarn fiber fabric 5 is
The synthetic prepreg 11 is formed by alternately laminating and polymerizing a prepreg impregnated with a synthetic resin applied and impregnated into a warp weft fiber woven fabric 9 formed according to a conventional method.

In the first embodiment, as described above, the mandrel 1
And the braider 2, the tubular fabric 4 formed by the braider 2 is cut open to form the diagonal yarn fiber fabric 5, and the length and width of the diagonal yarn fiber fabric 5 are determined by the length and thickness of the cylindrical fabric 4, Since it is possible to form the oblique yarn fiber fabric 5 having an arbitrary length and width, and since the cylindrical fabric 4 can be formed even if it is very long, even the extremely long oblique yarn fiber fabric 5 can be easily formed. Can be formed.

After the tubular fabric 4 is formed on the outer peripheral surface of the mandrel 1, the tubular fabric 4 is immediately cut out to form the oblique thread fiber fabric 5, and the oblique thread fiber fabric 5 is wound into a roll. In addition, a divided mandrel 1a divided into a plurality of parts in the front-rear direction is adopted as the mandrel 1, the front divided mandrel 1a is removed, and the removed divided mandrel 1a is sequentially placed behind the last divided mandrel 1a. Since the joining structure is adopted, the length of the mandrel 1 becomes practically infinite, so that a very long tubular woven fabric 4 can be formed even if the entire length of the mandrel 1 is inevitably short. Can be formed continuously even with a long-diagonal-thread fiber fabric 5. Further, the formed long oblique yarn fiber fabric 5 (or the prepreg 29 of the oblique yarn fiber fabric 5) has a high commercial value that a user can cut and use it to an arbitrary length.

Further, since the first resin layer is provided on the outer peripheral surface of the mandrel 1, and the tubular fabric 4 is formed on the first resin layer, the tubular fabric 4 is formed in the process of forming the tubular fabric 4. A prepreg in which the woven fabric 4 and the first resin layer are integrated with each other can be formed. Inevitably, the prepreg 29 obtained by applying and impregnating the diagonal fiber fabric 5 with a synthetic resin by cutting open the prepreg. Can be obtained.

Also, the first resin tape 20 in which the synthetic resin is applied to the release paper 24 is used to provide the first resin layer on the mandrel 1. Since the release paper 24 is configured to abut the mandrel 1, the first resin tape 20 is spirally wound around the mandrel 1 to easily and uniformly provide the first resin layer on the mandrel 1. And release paper
Due to the presence of 24, the resin does not directly adhere to the mandrel 1 and the prepreg can be peeled off from the mandrel 1 satisfactorily. Further, when the split mandrel 1a is used, the prepreg is separated after the prepreg is peeled off. While joining the prepreg 1a as it is to the rear of the rearmost divided mandrel 1a, the mandrel 1 is moved in the axial direction to form the tubular fabric 4.

In addition, after the second resin layer is provided on the tubular fabric 4 formed on the mandrel 1, the tubular fabric 4 and the second resin layer are peeled off from the mandrel 1. The tubular fabric 4 is sandwiched between a first resin layer provided on the mandrel 1 and a second resin layer provided on the tubular fabric 4, and the tubular fabric 4 is inevitably sandwiched.
Is obtained as a prepreg 29 provided with a resin layer on both the front side and the back side.
29 will be obtained.

Further, the method of providing the second resin layer on the tubular fabric 4 also uses a resin tape (second resin tape 22) in which a synthetic resin is applied to release paper. Is spirally wound around the tubular fabric 4 so that the second resin layer can be easily and uniformly provided on the mandrel 1, and a more uniform quality diagonal fiber fabric without resin unevenness. 5 prepregs will be obtained.

Further, the release paper 24 of the first resin tape 20 is left on the mandrel 1 and the slanted yarn fiber fabric 5
While leaving the release paper of the second resin tape 22 on the prepreg 29, the prepreg of the oblique yarn fiber fabric 5 is
Since it is peeled from the top and rolled up, the prepreg rolled up
A release paper is present on one side of 29, and even if it is wound up in a roll shape, the prepregs 29 that are adjacently polymerized will not adhere to each other. Further, if the method is to peel off the release paper of the second resin tape 22 from the prepreg and leave the release paper 24 of the first resin tape 20 on the prepreg 29, the release paper of the second resin tape 22 must be peeled off. For example, the prepreg 29 cannot be wound up, and the entire apparatus becomes long. However, in this embodiment, the release paper of the second resin tape 22 is left on the prepreg, and at the same time as the operation of peeling the prepreg 29 from the mandrel 1, The release paper 24 of one resin tape 20 can be peeled off, so that the entire device can be shortened.

After forming the tubular fabric 4 to which the synthetic resin is not applied, the tubular fabric 4 is cut out to form the slanted fiber fabric 5, and then the resin is applied to the slanted fiber fabric 5. In the method of producing a prepreg by impregnating the prepreg, a prepreg of the very long diagonal fiber fabric 5 can be formed in the same manner.

In the second embodiment, an axial thread supply section 6 for supplying an axial thread R disposed in the axial direction of the mandrel 1 is provided behind the braider 2, and the axial thread R is provided on the mandrel 1.
Are provided, a plurality of oblique yarns S are supplied and woven from the oblique yarn supply section 3 of the braider 2 onto the axial yarn R, and the axial yarn R and the tubular fabric 4 are superposed. The fabric 7 is formed, and the plurality of diagonal yarns S are disposed diagonally and the axial yarn R is disposed in the elongate direction by cutting the polymerized tubular textile 7 in the axial direction of the mandrel 1. To manufacture the obtained oblique yarn fiber woven fabric 8 with an axial yarn.

In the second embodiment, as in the first embodiment, after the first resin layer is provided on the mandrel 1 with the first resin tape 20, the polymerized tubular fabric 7 is placed on the first resin layer. Then, a second resin layer is provided on the polymerized tubular fabric 7 with a second resin tape 22. Thereafter, the polymerized tubular fabric 7 is cut open in the axial direction by a cutting tool 30 such as a cutter to form an axial thread. The slanted-fiber woven fabric 8 is formed and then wound into a roll.

According to the second embodiment, similarly to the first embodiment, the length and width of the oblique yarn fiber woven fabric 8 with the axial yarn are determined by the length and thickness of the superposed tubular woven fabric 7, and The length and width of the diagonal yarn fiber woven fabric 8 with axial threads can be formed, and the polymerized tubular woven fabric 7 can be formed even if it is very long. 5
However, it can be easily formed.

Further, the presence of the axial yarn R increases the strength of the oblique yarn fiber woven fabric 8 with the axial yarn in the longitudinal direction.

After the axial thread R is provided on the mandrel 1, the axial thread R is held down by the tubular fabric 4, and the axial thread R is fixed well. In addition, an axial thread supply unit is provided in front of the braider 2,
After the tubular fabric 4 is formed on the mandrel 1 and the axial yarn R is disposed on the tubular fabric 4, the second resin tape 22
As a result, the axial yarn R is fixed.

As described above, according to the first embodiment and the second embodiment, the practicality and productivity can easily obtain a long oblique thread fiber woven fabric or the like used for an extremely long FRP product. Technology.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a polymer fiber 10 obtained by alternately polymerizing a diagonal yarn fiber fabric 5 and a warp weft yarn fiber fabric 9;

FIG. 2 is an explanatory plan view showing a method for manufacturing a conventional oblique yarn fiber fabric 5;

FIG. 3 is a prepreg 29 of the diagonal yarn fiber fabric 5 of the first embodiment.
FIG. 3 is an explanatory view of an apparatus for manufacturing a device.

FIG. 4 is an explanatory perspective view of the braider 2 of the first embodiment.

FIG. 5 is an explanatory perspective view showing a process of manufacturing a prepreg 29 of the oblique yarn fiber fabric 5 from a prepreg of the tubular fabric 4 of the first embodiment.

FIG. 6 is an explanatory perspective view of a braider 2 according to a second embodiment.

FIG. 7 is an explanatory view of an oblique yarn fiber fabric 8 with an axial yarn obtained according to a second embodiment.

[Explanation of symbols]

 S Oblique Thread R Axial Thread 1 Mandrel 2 Brader 3 Oblique Thread Supply Unit 4 Cylindrical Fabric 5 Oblique Thread Fiber Fabric 6 Axial Thread Supply Unit 7 Polymerized Cylindrical Fabric 8 Oblique Thread Fiber Fabric with Axial Thread 9 Warp weft fiber fabric 10 Polymerized fiber fabric

Continued on the front page F term (reference) 4F072 AB10 AB27 AD23 AD37 AG03 4F205 AD16 AG03 HA14 HA33 HA35 HA45 HB01 HC06 HL15 HM04 4L031 AB01 AB32 DA00 4L046 AA03 AA24 AB03 AB05 AD01 BA00 BB00

Claims (10)

[Claims] 1. A method for producing a fiber woven fabric for FRP, comprising inserting a mandrel movable in an axial direction into a braider having a diagonal thread supply unit, wherein the diagonal thread supply unit includes an outer peripheral surface of the mandrel. The slanted yarn S is supplied at a predetermined angle ± θ with respect to the axis of the mandrel, and a plurality of slanted yarns S are supplied from the slanted yarn supply unit to supply the slanted yarn S on the outer peripheral surface of the mandrel. And fabricating a long oblique thread fiber woven fabric in which the plurality of oblique threads S are disposed by cutting the tubular fabric in the axial direction of the mandrel. Of producing a fiber woven fabric for FRP. 2. The method for producing a fiber woven fabric for FRP according to claim 1, wherein a known round striker is used as the known braider. 3. A method for producing a fiber woven fabric for FRP, comprising inserting a mandrel movable in the axial direction into a braider having a diagonal thread supply unit, wherein the diagonal thread supply unit includes an outer peripheral surface of the mandrel. The oblique thread S is supplied at a predetermined angle ± θ with respect to the axis of the mandrel, and an axial thread R arranged in the direction of the axis of the mandrel is supplied to one side of the braider. An axial yarn supply unit is provided, and a plurality of axial yarns R are supplied from the axial yarn supply unit onto the outer peripheral surface of the mandrel, and a plurality of diagonal yarns S are supplied from the diagonal yarn supply unit. By weaving a tubular woven fabric on the outer peripheral surface of the mandrel, a polymerized tubular woven fabric in which the axial yarn R and the tubular woven fabric are polymerized is woven. The plurality of diagonal yarns S are disposed in the axial direction. Method for producing a fiber fabric for FRP, characterized in that R is the production of axial yarns with diagonal yarns fiber fabric long disposed in the longitudinal direction. 4. The method for producing a fiber woven fabric for FRP according to claim 3, wherein a known round striker is used as the known braider. 5. A method of manufacturing a prepreg for an FRP, comprising inserting a mandrel movable in an axial direction into a braider having an oblique thread supply section, wherein the oblique thread supply section is provided on an outer peripheral surface of the mandrel. The mandrel is configured to supply the slant yarn S at a predetermined angle ± θ with respect to the axis of the mandrel, and an uncured or semi-cured first synthetic resin layer is provided on the outer peripheral surface of the mandrel. A plurality of diagonal yarns S are supplied from the diagonal yarn supply unit on one synthetic resin layer to woven a tubular woven fabric on the outer peripheral surface of the mandrel, and then, uncured on the outer peripheral surface of the tubular woven fabric. A second synthetic resin layer in a state or a semi-cured state is provided, and then the first synthetic resin layer and the second synthetic resin layer are semi-cured to form a prepreg of a tubular fabric. The prepreg is cut open in the axial direction of the mandrel, F, characterized in that the direction yarns S to produce a prepreg diagonal yarns fiber fabric long arranged
A method for producing a prepreg for RP. 6. A method of manufacturing a prepreg for an FRP, comprising inserting a mandrel movable in an axial direction into a braider having an oblique thread supply section, wherein the oblique thread supply section is provided on an outer peripheral surface of the mandrel. A shaft for supplying an oblique thread S at a predetermined angle ± θ with respect to the axis of the mandrel, and supplying an axial thread R disposed in the direction of the axis of the mandrel to one side of the braider. A directional yarn supply unit is provided, and an uncured or semi-cured first synthetic resin layer is provided on the outer peripheral surface of the mandrel, and a plurality of axial yarns are provided on the first synthetic resin layer from the axial yarn supply unit. R is supplied onto the outer peripheral surface of the mandrel, and a plurality of diagonal yarns S are supplied from the diagonal yarn supply section to weave a tubular woven fabric on the outer peripheral surface of the mandrel. Weaving a polymerized tubular fabric obtained by polymerizing the tubular fabric, An uncured or semi-cured second synthetic resin layer is provided on the outer peripheral surface of the polymerized tubular fabric, and then the first synthetic resin layer and the second synthetic resin layer are semi-cured to form a polymerized cylinder. The prepreg of the tubular woven fabric is formed. Subsequently, the prepreg of the polymerized tubular woven fabric is cut open in the axial direction of the mandrel, and the plurality of diagonal threads S are disposed and the axial threads R are disposed in the longitudinal direction. A method for producing a prepreg for FRP, characterized by producing a prepreg of a long skewed fiber woven fabric provided with an axial thread. 7. The FR according to claim 1, 2 or 3.
An oblique yarn fiber woven fabric obtained by the method for producing a fiber woven fabric for P and a warp weft yarn woven fabric formed by weaving a warp yarn and a weft yarn by a known weaving machine are polymerized. A method for producing a prepreg for FRP, comprising applying and impregnating a prepreg. 8. The FR according to any one of claims 1 and 2,
A prepreg is formed by applying and impregnating a synthetic resin to the oblique yarn fiber woven fabric obtained by the method of manufacturing a fiber woven fabric for P, and a warp yarn formed by weaving a warp yarn and a weft yarn by a known weaving machine. Applying and impregnating a synthetic resin to the weft fiber fabric to form a prepreg, and polymerizing a prepreg obtained from the oblique yarn fiber fabric and a prepreg obtained from the warp weft fiber fabric to form a polymerized prepreg. A method for producing a prepreg for FRP, which is a feature. 9. The FR according to claim 3, wherein
The oblique yarn fiber woven fabric with an axial yarn obtained by the method for producing a fiber woven fabric for P and the warp weft fiber woven fabric formed by weaving the warp yarn and the weft yarn by a known weaving machine are polymerized. A method for producing a prepreg for FRP, wherein a prepreg is formed by applying and impregnating a synthetic resin to a fiber fabric. 10. The F according to claim 3, wherein
A prepreg is formed by applying and impregnating a synthetic resin to an oblique yarn fiber woven fabric with an axial yarn obtained by a method of manufacturing a fiber woven fabric for RP, and weaving a warp yarn and a weft yarn by a known weaving machine. A prepreg is formed by applying and impregnating the formed warp weft fiber woven fabric with a synthetic resin, and polymerizing the prepreg obtained from the oblique yarn fiber woven fabric with the axial yarn and the prepreg obtained from the warp weft fiber woven fabric. A method for producing a prepreg for FRP, comprising forming a polymerized prepreg by heating.