JP2010248391A - Manufacturing method of prepreg and prepreg - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a prepreg made by impregnating base fabric with a resin, and to provide its manufacturing method, in which a fiber direction of the original base fabric is retained by preventing fiber bending against a width direction at the time of impregnating. <P>SOLUTION: A prepreg 21 having a multiaxial woven fabric 11 as base fabric is obtained by impregnating the multiaxial woven fabric 11 with a resin, forming resin films 23 and 24, wherein a release paper 12 is sutured to both ends of the width direction of the multiaxial woven fabric 11. The release paper 12 is sutured to the multiaxial woven fabric 11, before the resins (resin films 23 and 24) are impregnated into the base multiaxial woven fabric 11. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a technology for a prepreg and a prepreg manufacturing method.

  Conventionally, a prepreg which is a fiber material obtained by impregnating a base fabric such as glass fiber or carbon fiber with a thermosetting or thermoplastic resin is known, and in various industrial fields as a material for molding a product. It is utilized. And as the manufacturing method of the prepreg which concerns, the technique is disclosed by the patent document 1 shown below, and is known.

  In the related art disclosed in Patent Document 1, a plurality of multiaxial base fabrics and thermoplastic (or thermosetting) resin films are laminated and stitched together with stitch yarns, which are heated and pressed ( A manufacturing method is shown in which a prepreg is obtained by rolling) and impregnating a multiaxial base fabric with resin.

  However, in the prior art disclosed in Patent Document 1, when impregnating the resin, the fibers of the multiaxial base fabric flow along the flow of the heated and softened resin, and the direction of the fibers shifts. There was a case of (curved eyes). When the fiber direction is deviated, the structure of the prepreg is different from the designed structure, so that there is a problem in that the design strength cannot be secured in the final product formed using the prepreg.

Moreover, as a prepreg which prevented the bending of the base material, the technique is disclosed by the patent document 2 shown below, for example.
In the related art shown in Patent Document 2, the prepreg used for the printed wiring board is impregnated with a resin varnish, and then dried using a dryer in a state where the prepreg is suspended. In order to prevent tearing from occurring at the end of the substrate and bending from occurring in the prepreg, the tensile strength at the end of the substrate is set higher than that at the other portions.

  Here, as a method of increasing the tensile strength of the end portion of the base material, after applying a thermosetting polyester resin to the end portion of the base material in advance, the entire base material is impregnated with a bisphenol-type thermosetting resin. By using the property that thermosetting polyester resin cures faster than bisphenol type thermosetting resin, the tensile strength at the end of the substrate is increased, or the reinforcing yarn is preliminarily attached to the end of the substrate. To increase the rigidity of the edge of the base material.

  However, by increasing the rigidity of the end portion of the base material, it was not possible to prevent fiber bending caused by heating and rolling during impregnation. For this reason, development of a technique capable of reliably preventing fiber bending caused by heating and rolling during impregnation has been desired.

JP 2006-291369 A JP 7-173306 A

  The present invention has been made in view of the present situation, and for a prepreg produced by impregnating a base fabric with a resin, by preventing fiber bending in the width direction that occurs during impregnation, the original base fabric It is an object of the present invention to provide a prepreg in which the fiber direction is maintained and a method for producing the prepreg.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, according to claim 1, a prepreg having a base fabric, the base fabric being impregnated with a resin, sheet members are stitched to both ends in the width direction of the base fabric, and the sheet The member is sewn to the base fabric before the resin is impregnated with the base fabric.

  In the present invention, a release paper is used for the sheet member.

  The method of manufacturing a prepreg having a base fabric, wherein the base fabric is impregnated with a resin, the resin impregnation step of impregnating the base fabric with the resin, and the base fabric And a sheet member stitching step for stitching the sheet member at both ends in the width direction, and the sheet member stitching step is performed before the resin impregnation step.

  According to a fourth aspect of the present invention, a release paper is used for the sheet member.

  As effects of the present invention, the following effects can be obtained.

  In claim 1, the fiber is not bent in the width direction of the prepreg, and can be a prepreg in which the fiber direction of the original base fabric is maintained, and the final product manufactured based on the prepreg About design strength can be secured.

  According to the second aspect of the present invention, the prepreg can be handled in a conventional manner by using the release paper conventionally used for the prepreg.

  According to the third aspect of the present invention, it is possible to manufacture a prepreg in which the fiber direction of the original base fabric is maintained without being bent by regulating the fiber displacement with respect to the width direction of the prepreg during impregnation. Thereby, the design strength of the final product manufactured based on the prepreg can be ensured.

  According to the fourth aspect of the present invention, the prepreg can be handled in the conventional manner by using the release paper conventionally used for the prepreg.

The schematic diagram which shows the structure of the base fabric applied to the manufacturing method of the prepreg which concerns on one Example of this invention. Schematic diagram showing the condition of fiber bending, (a) Schematic diagram showing a multiaxial fabric before impregnation, (b) Schematic diagram showing a conventional prepreg after impregnation, (c) One embodiment of the present invention after impregnation The schematic diagram which shows the prepreg which concerns on an example. The schematic diagram which shows the manufacturing process of the prepreg which concerns on one Example of this invention, (a) The side surface schematic diagram which shows the base material fabric manufacturing process-sheet | seat member stitching process by a 1st manufacturing apparatus, (b) Resin by a 2nd manufacturing apparatus The side surface schematic diagram which shows an impregnation process-a packaging process. The perspective view which shows the manufacturing process (The base fabric manufacturing process-Sheet | seat member sewing process by a 1st manufacturing apparatus) of the prepreg which concerns on one Example of this invention. The flowchart which shows the manufacturing process of the prepreg which concerns on one Example of this invention.

Next, embodiments of the invention will be described.
First, a multiaxial woven fabric, which is a base woven fabric applied to a method for producing a prepreg according to an embodiment of the present invention, will be described with reference to FIG. FIG. 1 is a schematic view showing a configuration of a base fabric applied to a method for producing a prepreg according to an embodiment of the present invention.

  As shown in FIG. 1, a multiaxial fabric 11 that is an example of a base fabric applied to a method for manufacturing a prepreg according to an embodiment of the present invention includes a plurality of base materials 9 and 10 having different fiber directions (angles). It is a woven fabric formed by laminating. In the multi-axis woven fabric 11, the base materials 9 and 10 are integrally formed by stitching with a stitch thread (not shown), but the binding force of the stitch thread is weak, and unlike the plain woven fabric, the mutual bases 9 and 10 are mutually connected. Since the fibers are not knitted, the fibers constituting the base materials 9 and 10 are easily bent.

  When the coordinate system is defined as shown in FIG. 1, the X-axis direction indicates the length direction of each of the base materials 9 and 10 impregnated with the resin, and the Y-axis direction is a direction orthogonal to the base material 9 and each base material 9. -The width direction of 10 (and the dry base material 13 and the prepreg 21 mentioned later etc.) is shown. The Z axis direction is a direction orthogonal to the X axis and the Y axis. In this example, the fiber direction (angle) parallel to the X-axis direction is defined as 0 °, and the fiber direction (angle) parallel to the Y-axis is defined as 90 °. In addition, the coordinate system prescribed | regulated by a present Example is defined for convenience of explanation, and it does not limit the conveyance direction of each base material etc. in the manufacturing method of the prepreg concerning one example of the present invention to this. .

  And as shown in FIG. 1, the multiaxial fabric 11 which consists of the base material 9 which this fiber direction is 0 degree, and the base material 10 whose fiber direction is 90 degrees is the multiaxial fabric 11 of 0 degree and 90 degrees, Shall be called. In the present embodiment, the multiaxial fabric 11 is illustrated as the base fabric to be impregnated. However, the base fabric to which the prepreg manufacturing method according to an embodiment of the present invention is applied is It is not limited to a shaft fabric, but is applicable not only to a multi-axis fabric but also to a substrate fabric in which fibers are aligned in one direction (for example, only the substrate 9 (hereinafter referred to as UD)). Is possible. Further, in this embodiment, the multiaxial woven fabric 11 of 0 ° / 90 ° is illustrated as the base fabric to be impregnated, but the prepreg manufacturing method according to one embodiment of the present invention is applied. The fiber direction of the multiaxial fabric 11 is not limited to 0 ° / 90 °.

  Next, the fiber bend produced during the impregnation will be described with reference to FIG. FIG. 2 is a schematic view showing the condition of fiber bending, (a) a schematic view showing a multiaxial fabric before impregnation, (b) a schematic view showing a conventional prepreg after impregnation, (c) the present invention after impregnation. It is a schematic diagram which shows the prepreg which concerns on one Example.

  As shown in FIG. 2A, when the resin is impregnated into the 0 ° / 90 ° multiaxial fabric 11, the fibers of the base materials 9 and 10 constituting the multiaxial fabric 11 are not impregnated. The fiber directions (angles) are assumed to be maintained even after the impregnation at the time of design.

  However, when the multiaxial woven fabric 11 is impregnated with a resin film (not shown) superimposed (heated and rolled), the resin having reduced viscosity enters the fiber while flowing from the center toward the outside. Therefore, at this time, the fiber is pressed by the flow of the resin. For this reason, as shown in FIG.2 (b), in the conventional prepreg 51, the bending of a fiber will arise.

In reality, since the fibers (base fabric) are continuously continuous in the X-axis (length) direction, bending in the X-axis direction is not a problem, but the fibers are interrupted at the ends. Therefore, the bending of the fiber with respect to the Y-axis (width) direction, which is not regulated, becomes a particular problem.
In this example, a method for producing a prepreg capable of preventing fiber bending with respect to the width direction (Y-axis direction) of the base fabric and thus maintaining the fiber direction of the original base fabric and The prepreg manufactured by the manufacturing method is shown.

  Next, a manufacturing apparatus used for manufacturing a prepreg according to an embodiment of the present invention will be described with reference to FIGS. FIG. 3 is a schematic diagram showing a manufacturing process of a prepreg according to an embodiment of the present invention, (a) a schematic side view showing a base fabric manufacturing process to a sheet member stitching process by a first manufacturing apparatus, and (b) a second manufacturing process. FIG. 4 is a perspective view showing a manufacturing process of a prepreg according to an embodiment of the present invention (a base fabric manufacturing process to a sheet member stitching process) according to an embodiment of the present invention. It is.

  As shown in FIGS. 3A and 3B, the prepreg manufacturing apparatus used in the prepreg manufacturing method according to one embodiment of the present invention includes a first manufacturing apparatus 1 and a second manufacturing apparatus 2. .

  As shown in FIG. 3 (a), the first manufacturing apparatus 1 includes a first base material generating unit 3, a second base material generating unit 4, base material stitching sewing machines 5, 5 and 5, a sheet member mandrel 6, and a sheet. It is comprised by the sewing machine 7 * 7 for member sewing, the dry base material winding mandrel 8, and the rotating rollers 14.14 ... etc., and it concerns on one Example of this invention mentioned later by the 1st manufacturing apparatus 1 which concerns. The base fabric manufacturing process and the sheet member stitching process in the prepreg manufacturing method are performed.

  The first manufacturing apparatus 1 will be described in further detail. As shown in FIG. 4, the first base material generating unit 3 is composed of warp bobbins 3a, 3a,. And in the 1st base material production | generation part 3, warp yarn 3c * 3c. * Along the Z-axis direction (or it can also be set to X-axis direction) shown in FIG. Is supplied to the alignment unit 3b. Then, the warp yarns 3c, 3c... Are aligned in the 0 ° direction and aligned by the aligning portion 3b to generate the base material 9. In addition, in FIG. 3A, in order to make an understanding of an invention easy, the 1st base material production | generation part 3 is simplified and described.

  Moreover, the 2nd base material production | generation part 4 is comprised by the weft bobbins 4a * 4a ..., the alignment part 4b, etc. FIG. Then, the second base material generation unit 4 supplies the wefts 4c, 4c,... To the alignment unit 4b from the weft bobbins 4a, 4a,. And the weft threads 4c, 4c... Are aligned in the 90 ° direction and aligned by the aligning portion 4b to generate the base material 10. In FIG. 3 (a), in order to facilitate understanding of the invention, the second base material generating part 4 is simplified and described, and the weft threads 4c, 4c,. It is changed and described.

  The base material sewing machines 5, 5, 5 are respectively connected to the base materials 9, 4 supplied from the base material generation units 3, 4 by stitch yarns 5 a, 5 a, 5 a as shown in FIGS. 10 is a device for suturing 10. Then, the base material sewing machines 5, 5, 5 sew the base materials 9, 10 with the stitch yarns 5 a, 5 a, 5 a and integrate them to produce the multiaxial fabric 11.

  The sheet member mandrel 6 is a shaft core portion on which a roll-prepared sheet member is mounted, and is perpendicular to the base materials 9 and 10 and the sheet member conveyance direction (X-axis and Z-axis directions). It is arranged. In this embodiment, the release paper 12 that has been conventionally used for manufacturing a prepreg is employed as the sheet member. In addition, the sheet member is not limited to the release paper 12, and may be appropriately selected as long as the sheet member has a rigidity that does not expand or contract even if heated or rolled during the resin impregnation step. It is possible to select and use.

  The sheet member sewing machines 7 and 7 are devices for stitching the release paper 12 as the sheet member to the multiaxial fabric 11 with stitch yarns 7a and 7a as shown in FIGS. There is a base material (hereinafter referred to as dry base material 13) that can be supplied to the resin impregnation step in the subsequent step by sewing the release paper 12 to the multiaxial fabric 11 with the sheet member sewing machines 7 and 7. Generate.

  The dry substrate winding mandrel 8 is an axial core portion that is rotationally driven by a motor or the like (not shown), and is perpendicular to the conveyance direction (X-axis and Z-axis directions) of the substrates 9 and 10 and the release paper 12. And a part that plays a role of transporting and driving the base materials 9 and 10 and the release paper 12. The generated dry base material 13 is wound around the dry base material winding mandrel 8.

  In the first manufacturing apparatus 1, rotating rollers 14, 14... Are arranged at various locations, and each substrate 9, 10, multi-axis is supported by the rotating rollers 14, 14. The fabric 11, release paper 12, dry base material 13, etc. are transported.

  The second manufacturing apparatus 2 includes a dry substrate mandrel 15, resin film mandrels 16 and 17, an impregnation apparatus 18, a packaging film mandrel 19, a prepreg winding mandrel 20, a packaging apparatus 26, and the like. The second manufacturing apparatus 2 performs a resin impregnation step and a packaging step in a method for manufacturing a prepreg according to an embodiment of the present invention described later.

  The dry substrate mandrel 15 is an axial core portion on which the dry substrate 13 prepared in a roll shape is mounted, and is disposed perpendicular to the transport direction (X-axis direction) of the dry substrate 13. . In this embodiment, the case where the prepreg manufacturing apparatus is divided into the first manufacturing apparatus 1 and the second manufacturing apparatus 2 is illustrated, but the apparatuses 1 and 2 may be configured as one continuous apparatus. Is possible. In this case, since the generated dry base material 13 can be transferred to the resin impregnation process as it is without winding up the dry base material 13, the dry base material winding mandrel 8 and the dry base material mandrel 15 described above are It can be omitted.

  The resin film mandrels 16 and 17 are shaft core portions on which resin films 23 and 24 having thermosetting properties and thermoplastic properties prepared in a roll shape are mounted, and the transport direction of the resin films 23 and 24 (X With respect to the axis and the Z-axis direction). Each resin forming the resin films 23 and 24 is a resin impregnated in the dry base material 13.

  The impregnation device 18 is a device for impregnating the dry base material 13 supplied to the impregnation device 18 in a state where the resin films 23 and 24 are overlapped, and includes heating devices 18a and 18a and a rolling roller. 18b and 18b are provided.

  Then, after the resin films 23 and 24 are heated to a predetermined temperature by the heating devices 18a and 18a to soften the resin films 23 and 24, the softened resin is dried by rolling with the rolling rollers 18b and 18b. It pushes into the back of the fiber of the base material 13, and the impregnation of resin to the dry base material 13 is performed by this.

  Then, the impregnating device 18 impregnates the dry base material 13 with the resin films 23 and 24 to generate the prepreg 21.

  The packaging film mandrel 19 is a shaft core portion on which a packaging film 25 prepared in a roll shape is mounted, and is disposed perpendicular to the conveyance direction (X-axis direction) of the prepreg 21. And the packaged prepreg 22 made into the aspect which prevents the deterioration of the prepreg 21 is produced | generated by packaging the produced | generated prepreg 21 with the packaging film 25 unwound from the mandrel 19 for packaging films.

  The prepreg winding mandrel 20 is a shaft core portion around which the generated packaged prepreg 22 is wound, and is disposed perpendicular to the conveying direction (X-axis direction) of the prepreg 21. The prepreg take-up mandrel 20 is a part that is driven to rotate by a motor (not shown) and carries and drives the dry base material 13, the resin films 23 and 24, the packaging film 25, the packaged prepreg 22, and the like.

  The packaging device 26 is a device that forms a bag-shaped package with the release paper 12 applied to the prepreg 21 and the packaging film 25 supplied from the packaging film mandrel 19. The packaging device 26 packages the prepreg 21. Thus, the packaged prepreg 22 is generated.

  Next, the manufacturing method of the prepreg which concerns on one Example of this invention is demonstrated using FIGS. FIG. 5 is a flow chart showing a prepreg manufacturing process according to an embodiment of the present invention. In addition, although the case where a prepreg is manufactured using a multiaxial woven fabric of 0 ° / 90 ° is illustrated here, the base fabric that can be applied to the prepreg manufacturing method according to an embodiment of the present invention. However, the present invention is not limited to this, and a base fabric (UD) in which a multiaxial fabric composed of a combination of other angles or a fiber (UD) in which fibers are aligned in one direction can be used.

(Base fabric manufacturing process)
As shown in FIGS. 3A and 5, in the method for manufacturing a prepreg according to one embodiment of the present invention, first, a base fabric manufacturing process is performed (STEP-1).
The base materials 9 and 10 generated by the base material generation units 3 and 4 are supplied to the base material sewing machines 5, 5, and 5 while changing the conveying direction while being assisted by the rotating rollers 14 and 14. .

  The base materials 9 and 10 conveyed to the tables 5b, 5b, and 5b of the base material sewing machines 5, 5, and 5 are stitched by the stitch yarns 5a, 5a, and 5a, and an integral multiaxial fabric 11 is generated. . When UD is used as the prepreg base material, the base fabric manufacturing process can be omitted, and the unrolled base material (UD) can be directly supplied to the sheet member stitching process described later. It is.

(Sheet member stitching process)
Next, the multiaxial fabric 11 generated in the base fabric manufacturing process is supplied to the sheet member stitching process (STEP-2).
Conventionally, the release paper 12 is applied using the adhesiveness of the prepreg 21 in the final packaging process of the prepreg 21. In the method for producing a prepreg according to an embodiment of the present invention, at the stage before the resin impregnation step is performed, at both ends in the width direction (Y-axis direction) of the base fabric (multiaxial fabric 11 in this embodiment). The release paper 12 is applied by stitching, and this point is different from the conventional manufacturing method.

  In the sheet member sewing step, the multiaxial fabric 11 is supplied to the sheet member sewing machines 7 and 7. Further, the release paper 12 mounted on the sheet member mandrel 6 is unwound while changing the conveying direction while being assisted by the rotating rollers 14, 14, and together with the multiaxial fabric 11, the sheet member sewing machine 7. 7 is supplied.

  The multi-axis fabric 11 and the release paper 12 conveyed to the tables 7b and 7b of the sheet member sewing machine 7 and 7 are sewn with stitch yarns 7a and 7a at both ends in the width direction (Y-axis direction). The In this way, the multiaxial fabric 11 and the release paper 12 are integrated, and the dry base material 13 is generated. Then, the generated dry base material 13 is wound around the dry base material winding mandrel 8.

(Resin impregnation process)
Next, as shown in FIGS. 3B and 5, the dry base material 13 generated in the sheet member stitching process is supplied to the resin impregnation process (STEP-3).
In the resin impregnation step, the dry base material 13 that has been wound up and prepared in a roll shape is mounted on a dry base material mandrel 15, and this is unwound and supplied to the impregnation device 18. In addition, the impregnating device 18 is supplied with the resin films 23 and 24 unwound from the resin film mandrels 16 and 17 together with the dry base material 13.

  Then, the dry base 13 and the resin films 23 and 24 supplied to the impregnation device 18 are heated to a predetermined temperature by the heating devices 18a and 18a, and thereby the resin films 23 and 24 are softened. In this state, the dry base material 13 and the resin films 23 and 24 are further rolled by the rolling rollers 18b and 18b, and the softened resin films 23 and 24 are pushed into the fibers of the dry base material 13 to form the resin film. The dry base material 13 is impregnated with the resin that constitutes 23 and 24, and the prepreg 21 is generated.

  At this time, the softened resin films 23 and 24 flow inside the fibers, but both ends of the dry base material 13 are stitched to the release paper 12 by the stitch yarns 7a and 7a, so that the fibers in the Y-axis direction are The flow is restricted, and the original fiber directions (0 ° and 90 ° fiber directions) of the base materials 9 and 10 are maintained. Further, such an effect can be obtained in the same manner even when a multiaxial fabric whose fiber direction is other than 0 ° / 90 ° or UD is used as the base fabric regardless of the specification of the base fabric.

(Packaging process)
Next, the prepreg 21 produced | generated at the resin impregnation process is supplied to a packaging process (STEP-4).
In the packaging process, the prepreg 21 is supplied to the packaging device 26. Further, the packaging film 25 mounted on the packaging film mandrel 19 is unwound while changing the transport direction while being assisted by the rotating rollers 14 and 14, and is supplied together with the prepreg 21 to the packaging device 26.

  Then, the prepreg 21 supplied to the packaging device 26 is packaged in a state where the prepreg 21 is sealed by the packaging film 25 on the upper surface side and the release paper 12 on the lower surface side, and the packaged prepreg 22 is generated. The generated packaged prepreg 22 is wound into a roll by the prepreg winding mandrel 20.

  In this embodiment, since the release paper 12 that has been conventionally applied to the prepreg is adopted as the sheet member, the step of attaching the release paper 12 to the prepreg 21 in the packaging process. And the apparatus for it can be abbreviate | omitted.

Next, a prepreg according to an embodiment of the present invention will be described with reference to FIG.
The prepreg 21 manufactured by the prepreg manufacturing method according to the above-described embodiment of the present invention has an aspect as shown in FIG. In the prepreg 21, since both ends in the width direction (Y-axis direction) are stitched to the release paper 12 (not shown) by stitch yarns 7 a and 7 a, the fiber bends in the width direction (Y-axis direction). It is possible to regulate.

Thereby, the prepreg 21 according to one embodiment of the present invention prevents the fiber from being bent in the width direction (Y-axis direction) in the resin impregnation step, and the fiber direction (0 ° · The prepreg 21 is held with a 90 ° fiber direction).
For this reason, if such a prepreg 21 is used, it is possible to ensure design strength and to manufacture a final product with a good aesthetic sense in which fiber patterns are aligned. Further, such an effect can be obtained in the same manner even when a multiaxial fabric having a fiber direction other than 0 ° / 90 ° or UD is used as the base fabric, regardless of the specifications of the base fabric used.

  In the present embodiment, since the release paper 12 that has been conventionally applied to the prepreg is employed as the sheet member, the method of using the prepreg 21 is not different from the conventional one. Moreover, since the part to which the release paper 12 is sewn is set to the surplus part (the part which is not the final product) at both ends of the prepreg 21, the release paper 12 is sewn to the multiaxial fabric 11 which is a base fabric. Even with this configuration, the quality of the final product manufactured by the prepreg 21 is not adversely affected.

That is, the manufacturing method of the prepreg 21 according to an embodiment of the present invention is a manufacturing method of the prepreg 21 having the multiaxial fabric 11 and impregnating the multiaxial fabric 11 with resin (resin films 23 and 24). And a resin impregnation step of impregnating the multiaxial fabric 11 with a resin made of resin films 23 and 24, and a sheet member stitching step of stitching the release paper 12 as a sheet member to both ends of the multiaxial fabric 11 in the width direction. And the sheet | seat member sewing process is set as the structure performed before a resin impregnation process.
With such a configuration, it is possible to regulate the fiber displacement during the resin impregnation step, no bending occurs in the width direction (Y-axis direction), and the fiber directions of the original base materials 9 and 10 are maintained. The prepreg 21 to be manufactured can be manufactured. Thereby, the intensity | strength of the final product manufactured based on the prepreg 21 is securable.

A prepreg 21 according to an embodiment of the present invention is a prepreg 21 having a multiaxial fabric 11 as a base fabric and impregnated with a resin that forms resin films 23 and 24 on the multiaxial fabric 11. The release paper 12 is stitched to both ends of the multiaxial fabric 11 in the width direction (Y-axis direction), and the release paper 12 is impregnated with the resin (resin films 23 and 24) before the multiaxial fabric 11 is impregnated. The multi-axis fabric 11 is sewn.
With such a configuration, it is possible to obtain a prepreg 21 in which the fiber direction of each of the original base materials 9 and 10 is held without causing bending in the width direction (Y-axis direction), and based on the prepreg 21 The strength of the manufactured final product can be ensured.

Furthermore, in the prepreg 21 and the manufacturing method thereof according to the first embodiment of the present invention, the release paper 12 is used as the sheet member.
Thus, the prepreg 21 can be handled in a conventional manner by using the release paper 12 conventionally used for manufacturing the prepreg 21 as a sheet member used to prevent fiber bending.

9 Base material 10 Base material 11 Multi-axis fabric 12 Release paper (sheet member)
13 Dry base material 21 Prepreg 23 Resin film 24 Resin film

Claims (4)

Having a base fabric,
A prepreg in which the base fabric is impregnated with a resin,
Sheet members are stitched to both ends in the width direction of the base fabric, and
The sheet member is
Before the resin is impregnated into the base fabric,
Stitched to the base fabric,
A prepreg characterized by that. In the sheet member,
Release paper is used,
The prepreg according to claim 1. Having a base fabric,
A method for producing a prepreg in which the base fabric is impregnated with a resin,
A resin impregnation step of impregnating the base fabric with the resin;
A sheet member stitching step for stitching a sheet member to both ends in the width direction of the base fabric, and
The sheet member suturing step includes
Performed before the resin impregnation step,
A method for producing a prepreg characterized by the above. In the sheet member,
Release paper is used,
The manufacturing method of the prepreg of Claim 3 characterized by the above-mentioned.

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