WO2007099825A1 - プリフォーム用の強化繊維基材など、およびその強化繊維基材の積層体の製造方法など - Google Patents
プリフォーム用の強化繊維基材など、およびその強化繊維基材の積層体の製造方法など Download PDFInfo
- Publication number
- WO2007099825A1 WO2007099825A1 PCT/JP2007/053157 JP2007053157W WO2007099825A1 WO 2007099825 A1 WO2007099825 A1 WO 2007099825A1 JP 2007053157 W JP2007053157 W JP 2007053157W WO 2007099825 A1 WO2007099825 A1 WO 2007099825A1
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- WIPO (PCT)
- Prior art keywords
- reinforcing fiber
- laminate
- fiber base
- preform
- base material
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B11/00—Making preforms
- B29B11/14—Making preforms characterised by structure or composition
- B29B11/16—Making preforms characterised by structure or composition comprising fillers or reinforcement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
- B29C43/3642—Bags, bleeder sheets or cauls for isostatic pressing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/06—Fibrous reinforcements only
- B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
- B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
- B29C70/20—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in a single direction, e.g. roofing or other parallel fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/06—Fibrous reinforcements only
- B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
- B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
- B29C70/20—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in a single direction, e.g. roofing or other parallel fibres
- B29C70/202—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in a single direction, e.g. roofing or other parallel fibres arranged in parallel planes or structures of fibres crossing at substantial angles, e.g. cross-moulding compound [XMC]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/06—Fibrous reinforcements only
- B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
- B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
- B29C70/22—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure
- B29C70/226—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure the structure comprising mainly parallel filaments interconnected by a small number of cross threads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
- B29C70/443—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding and impregnating by vacuum or injection
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
- D04H3/04—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments in rectilinear paths, e.g. crossing at right angles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
- B29C43/3642—Bags, bleeder sheets or cauls for isostatic pressing
- B29C2043/3644—Vacuum bags; Details thereof, e.g. fixing or clamping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
- B29C43/3642—Bags, bleeder sheets or cauls for isostatic pressing
- B29C2043/3652—Elastic moulds or mould parts, e.g. cores or inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
- B29K2105/0854—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns in the form of a non-woven mat
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
Definitions
- the present invention relates to a reinforcing fiber substrate used when a fiber-reinforced composite material is produced by a resin transfer molding method (hereinafter sometimes referred to as RTM molding method).
- the present invention also relates to a reinforcing fiber base laminate in which a plurality of the reinforcing fiber bases are laminated and partially bonded to be integrated.
- the present invention relates to a preform made of a body, and further to a fiber reinforced plastic obtained by injecting a matrix resin into the preform and curing it.
- FR fiber reinforced plastic
- Reinforced fiber base material suitable for manufacturing (which may be referred to as PJ)
- PJ Reinforced fiber base material suitable for manufacturing
- a laminate of the reinforcing fiber base material a preform that also has a laminated body strength of the reinforcing fiber base material
- the present invention relates to FRPs and their manufacturing methods.
- Structural members constituting transportation equipment such as airplanes are sufficiently satisfied with mechanical characteristics and are required to be thoroughly light weighted and cost-reduced.
- FRP is also being studied for primary structural members such as the tail, fuselage, etc.
- a pre-preder in which reinforcing fibers are impregnated with matrix resin is preliminarily laminated, and the pre-preda is laminated on a member-shaped molding die and heated and subjected to calorie pressure to mold FRP. .
- the pre-preda used here has a high reinforcing fiber volume content Vf as its characteristics. It is possible to obtain an FRP that can be controlled and has excellent mechanical properties, and thus has an advantage.
- the prepredder itself is an expensive material, refrigeration equipment is required for storage, and the productivity is low due to the use of an autoclave, there is a problem that the cost of the molded product becomes high. And it was something.
- the pre-predator or the laminated material laminated with the pre-predder is substantially required only for out-of-plane deformation, whereas the shape of the molded product is spherical or In the case of part or box shape, in-plane shear deformation is required in addition to out-of-plane deformation.
- in-plane shear deformation is virtually impossible because the reinforcing fibers are constrained by the matrix resin, and the pre-preda is applied to a complicated shape having a secondary curvature. The shape is extremely difficult.
- examples of molding methods that can improve FRP productivity and reduce molding costs include resin injection molding methods such as the resin transfer molding method (RTM molding method).
- RTM molding method the resin injection molding method
- the matrix resin is impregnated, and after the reinforcing fibers are placed in the mold, the matrix resin is injected, and the reinforcing fibers are impregnated with the matrix resin and the FRP is added. Mold.
- Matrix resin is cured by heating in an oven [0012]
- This resin transfer molding method has the advantage that the cost of the material can be reduced because a dry reinforcing fiber base is used, and that the molding cost can be reduced because no autoclave is used.
- a matrix resin is impregnated, and a preform that maintains the shape of the final product composed of a dry reinforcing fiber base material is prepared. After the preform is placed in a mold, a matrix resin is injected to mold FRP.
- the preform is formed by forming a reinforcing fiber base material based on a predetermined laminated structure using a shaping die or a shaping die having the shape of the final product, and the laminated material is shaped or molded. It can be obtained by shaping along the mold.
- a reinforcing fiber base material or a laminated material in which a reinforcing fiber base material is laminated requires only out-of-plane deformation. In the case of a part or box shape, in-plane shear deformation is also required.
- a multiaxial woven base material such as a woven base material in which yarns are arranged in biaxial directions is known.
- reinforcing fiber yarns cross to form a reinforcing fiber base, and the angle at which the reinforcing fibers cross is not restricted by an auxiliary yarn or the like. It is possible to change and in-plane shear deformation is possible.
- the reinforcing fiber yarns are arranged in multiaxial directions, for example, in the case of a biaxial fabric substrate, the number of reinforcing fiber yarns in each direction is essentially halved. As a result, there is a problem that the mechanical properties are low although the shapeability is excellent as compared with the unidirectional reinforcing fiber base material.
- the reinforcing fiber base material is changed to a shaping mold or a molding mold having a final shape.
- a method for maintaining the shape of the preform by laminating and shaping the reinforcing fiber bases by using the adhesive properties of the thermosetting resin and the thermoplastic resin is known. .
- the laminate of the reinforcing fiber base is compressed at a pressure sufficient to maintain the product shape even after the pressure is released, so that the laminate is deformed after the pressure is applied. It is extremely difficult. For this reason, it is necessary to prepare the preform by applying pressure after shaping the reinforcing fiber substrate into a product shape mold before applying pressure.
- trying to form a non-integrated multilayer laminate into a mold having a complicated shape has the disadvantage that the reinforcing fiber base material is scattered during shaping, which causes problems in handling. It was.
- Patent Document 2 In response to the problem of shaping the reinforcing fiber substrate into a complex shape, for example, a method of forming a preform having an arbitrary shape by applying reinforcing fibers to a large number of pins arranged in parallel has been proposed ( Patent Document 2). In this method, by adjusting the position of the pins on which the reinforcing fibers are hung, the reinforcing fibers are arranged in a predetermined laminated configuration, and the distance between the pins is adjusted to adjust the position of the pins of any width. Disclosure can be obtained.
- the FRP can be used by using a preform in which the reinforcing fiber base materials are bonded in the thickness direction.
- Patent Document 3 a method of forming a sheet.
- the thickness direction yarn is not arranged in the portion that needs to be deformed, but the thickness direction yarn is arranged in the portion that does not need to be deformed. Can be improved.
- this method uses a bi-directional fabric, and the bi-directional fabric weaves reinforcing fibers in two directions, so that the amount of reinforcing fibers in each direction is essentially halved.
- Patent Document 1 Japanese Patent Publication No. 9-508082
- Patent Document 2 Japanese Patent Application Laid-Open No. 2004-218133
- Patent Document 3 JP 2004-36055 A
- the object of the present invention is to provide a unidirectionally arranged reinforcing fiber base material excellent in formability, mechanical properties, knoWn and ring characteristics, and shaping of the reinforcing fiber base material, in view of the problems of the prior art It is intended to provide laminates and preforms and FRPs that are integrated by laminating a plurality of reinforcing fiber bases that maintain their properties, and to provide powerful preforms and FRPs with high productivity and low cost. It is intended to provide a manufacturing method for the strike.
- the unidirectionally reinforced fiber base material of the present invention has the following configuration (1).
- a unidirectionally arranged reinforcing fiber base material having a woven structure in which reinforcing fiber yarns are arranged in parallel in the direction and auxiliary yarns are arranged in at least the other direction, and the auxiliary fibers are arranged in the other direction.
- the length L of the yarn over one reinforcing fiber yarn, the width H of the reinforcing fiber yarn, and the amount of in-plane shear strain ⁇ are represented by the following equations (1) and (II), and the least one surface also in the direction sequence reinforcing fiber base, adhesive resin having a glass transition temperature Tg of 0 ° C or below over 95 ° C is being deposited within the deposition amount 2GZm 2 more 40GZm 2 or less.
- the unidirectionally arranged reinforcing fiber base material characterized in that the attached form is a dot, a line or a discontinuous line.
- L H / cos 0
- the reinforcing fiber base laminate of the present invention that solves the above-mentioned problems has the following configuration (2).
- a planar reinforcing fiber base material laminate in which a plurality of unidirectionally aligned reinforcing fiber base materials described in (1) are laminated, and adheres to each unidirectionally aligned reinforcing fiber base material.
- the adhesive resin is partially bonded over the entire surface of the unidirectionally arranged reinforcing fiber substrate facing each other, and the maximum length of each bonded portion is not less than lmm and the width of the reinforcing fiber yarn is not more than H.
- Reinforced fiber substrate laminate characterized by being.
- the reinforcing fiber base laminate of the present invention that has strength, more specifically, preferably has the following configuration (3).
- the powerful preform of the present invention preferably has the following configuration (5).
- a reinforced fiber plastic molded article of the present invention that solves the above-mentioned problems has the following configuration (6).
- the method for producing a reinforced fiber base laminate of the present invention that solves the above-described problems has the following configuration (7).
- a method for producing a reinforced fiber substrate laminate comprising producing a laminate through at least the following steps (A) to (F).
- the reinforcing fiber base material cut in the cutting step (A) is used with a robot arm, and the angle deviation of the reinforcing fiber base material is within 1 ° and the same.
- Heating step (D) In the heating step (D), the adhesive resin is attached to the surfaces on both sides of the reinforcing fiber base, and the heating temperature of the reinforcing fiber base laminate is set to the glass of the adhesive resin.
- the interval between the pressure parts adjacent to the bonding jig is set to be not less than H and not more than 30 mm.
- the cross-sectional shape of the pressure portion of the bonding jig is circular, the circular diameter is not more than the width H of the reinforcing fiber yarn, and is closest
- the preform manufacturing method of the present invention that solves the above-described problems has the following configuration (17).
- a preform manufacturing method wherein a preform is manufactured through at least the following steps (a) to (d).
- a method for producing a reinforced fiber plastic according to the present invention that solves the above-described problems is as follows.
- the preform according to (4) or (5) is disposed in a molding die having a resin injection port and a vacuum suction port, and the matrix resin is vacuum-sucked in the molding die. After the matrix resin is discharged from the vacuum suction locusr, the matrix resin injection from the resin injection port is stopped, and the matrix resin discharge amount of the vacuum suction locker is adjusted.
- a method for producing a reinforced fiber plastic comprising molding the reinforcing fiber volume content Vf of the reinforced fiber plastic to 45% or more and 72% or less.
- the matrix injection of the matrix resin having both the injection port and the vacuum suction port can be performed by vacuum suction from the resin injection port.
- the reinforcing fiber base material and the reinforcing fiber base material laminate obtained by laminating a plurality of reinforcing fiber base materials of the present invention are excellent in formability. Therefore, a preform comprising the reinforcing fiber base material laminate is: To provide FRP with high mechanical properties, and to make such FRP highly productive. A method for manufacturing at low cost can be provided.
- FIG. 1 is a schematic plan view showing an example of a unidirectionally reinforced fiber base material according to the present invention. However, the adhesive resin is not shown.
- FIG. 2 is a schematic plan view showing an enlarged example of the unidirectionally reinforced fiber base material according to the present invention shown in FIG. 1.
- FIG. please show the adhesive grease.
- FIG. 3 is a schematic plan view showing a state when the unidirectionally reinforced fiber base material shown in FIG. 1 undergoes in-plane shear deformation. However, it should be noted that the adhesive grease is not shown.
- FIG. 4 is a schematic plan view showing how the reinforcing fiber yarns move when the unidirectionally reinforced fiber base material shown in FIG. 1 is subjected to in-plane shear deformation. However, the adhesive grease is not shown!
- FIG. 5 is a schematic plan view showing an example of an apparatus for producing a unidirectionally reinforced fiber base material laminate according to the present invention.
- FIG. 6 is a schematic diagram showing an example of a pressure bonding process in the method for producing a reinforced fiber material laminate according to the present invention.
- FIG. 7 is a schematic explanatory view for explaining the situation when the preform according to the present invention is manufactured by the vacuum pugging method.
- FIG. 8 is a schematic diagram showing an adhesion state between unidirectionally arranged reinforcing fiber substrates in the reinforcing fiber substrate laminate according to the present invention.
- the present invention is made up of the above-mentioned problems, that is, a unidirectionally aligned reinforcing fiber base material excellent in formability, mechanical characteristics, and handling characteristics, and is composed of reinforcing fiber yarns and auxiliary yarns bundled together.
- a unidirectionally aligned reinforcing fiber base material excellent in formability, mechanical characteristics, and handling characteristics and is composed of reinforcing fiber yarns and auxiliary yarns bundled together.
- the reinforcing fiber substrate of the present invention is a unidirectionally arranged reinforcing fiber substrate having a form in which reinforcing fiber yarns are arranged in the-direction as described above and having a woven structure in which auxiliary yarns are arranged in at least the other direction.
- the length L of the auxiliary yarns arranged in the other direction across one reinforcing fiber yarn (hereinafter sometimes simply referred to as the auxiliary yarn length L) is the width H of the reinforcing fiber yarn.
- In-plane shear strain ⁇ force L H / cos ⁇ , and 3 ° ⁇ ⁇ ⁇ 30 °, and at least one surface of the unidirectionally reinforced fiber substrate has glass
- An adhesive resin having a transition temperature Tg of 0 ° C or higher and 95 ° C or lower is attached.
- the reinforcing fiber base material of the present invention is a base material that can be subjected to in-plane shear deformation so that it can be well shaped into a shape having a secondary curvature such as a spherical surface or a box shape.
- FIG. 1 is a schematic plan view illustrating an embodiment of the unidirectionally reinforced fiber base material of the present invention.
- This example shows a unidirectionally arranged reinforcing fiber base material in which reinforcing fiber yarns 2 aligned in one direction are bundled by a warp auxiliary yarn 3 and a weft auxiliary yarn 4.
- the configuration of the unidirectionally reinforced fiber base material of the present invention is not limited to the configuration shown in Fig. 1.
- the auxiliary yarn 3 of the weft yarn is not used but the auxiliary yarn 4 of the weft yarn is used.
- a twisted unidirectional reinforcing fiber substrate may be used.
- the use of the warp auxiliary yarn 3 makes it possible to minimize the crimp of the weft auxiliary yarn 4, and the reinforcing fiber base material is more easily deformed out of plane. This is preferable because the conformability to the shape is good.
- the unidirectionally arranged reinforcing fiber base material 1 has a high straightness of the reinforcing fiber yarn 2, excellent composite properties can be obtained.
- the auxiliary wefts used in the present invention are nylon 6 fibers, nylon 66 fibers, nylon 11 fibers, nylon 12 fibers, polyester fibers, polyaramid fibers, polyphenylene sano-reflective fibers, polyetherimide fibers, polyether sulfone.
- a weft of an auxiliary yarn whose main component is at least one selected from fiber, polyketone fiber, polyetherketone fiber, polyetheretherketone fiber and glass fiber force is preferable.
- nylon 66 fibers are preferred because they have good adhesion to rosin and can provide finer yarns by drawing.
- the weft yarn of the auxiliary yarn of the unidirectionally arranged reinforcing fiber base material in the present invention is preferably a multifilament yarn.
- the fineness (diameter) of the filament single yarn can be reduced. If this is used in a substantially untwisted state, the weft yarn of the auxiliary yarn in the fabric will be in a form where the filament single yarns are arranged in parallel without overlapping each other in the thickness direction. The thickness is reduced and crimp fiber is formed by the crossing or crossing of the reinforcing fiber yarn and the weft yarn of the auxiliary yarn, and the straightness of the reinforcing fiber yarn is increased in the fiber reinforced plastic, resulting in high mechanical properties.
- the weft yarn of the auxiliary yarn is as thin as possible.
- the fineness of the weft yarn of the auxiliary yarn is preferably more than 6 dtex and less than 70 dtex. More preferably, it is more than 15 decitex and less than 50 decitex.
- the weft density of the auxiliary yarn is more than 0.3 Zcm and more preferably less than 6.0 Zcm, more preferably more than 2.0 Zcm and less than 4.0 Zcm. If the weaving density of the auxiliary yarn is small, it is not preferable because the weaving of the auxiliary yarn occurs in the middle of weaving or in the powder spraying process, and the weft of the auxiliary yarn is disturbed.
- the warp yarn of the auxiliary yarn used in the present invention is preferably a glass fiber yarn that does not shrink due to heating at the time of curing of the resin adhering to the reinforcing fiber substrate of the adhesive resin.
- the fineness that does not need to be increased is preferably more than 100 dtex and less than 470 dtex.
- the reinforcing fiber yarns 2 constituting the unidirectionally arranged reinforcing fiber base material of the present invention include high strength such as carbon fiber, glass fiber, aramid fiber and PBO (polyparaphenylene-benzobisoxazole) fiber, High elastic modulus fibers are preferably used. Among these fibers, carbon fibers are more preferable because they have higher strength and higher elastic modulus than these fibers, and thus FRP having excellent mechanical properties can be obtained. A carbon fiber having a tensile strength of 4500 MPa or more and a tensile modulus of 250 GPa or more is more preferable because a better composite property can be obtained.
- FIG. 2 is a schematic plan view in which a space between adjacent reinforcing fiber yarns 2 of the unidirectional reinforcing fiber base 1 shown in FIG. 1 is enlarged.
- a gap S is provided between the adjacent reinforcing fiber yarns 2 by the length L of the weft auxiliary yarn 4.
- the width of the reinforcing fiber yarn 2 is H.
- the reinforcing fiber yarn 2 can move in parallel to the reinforcing fiber yarn 2 by the gap S, and the movable distance is controlled by the length L of the auxiliary yarn 4 of the weft yarn over the reinforcing fiber yarn 2. It is done.
- the length L of the auxiliary yarn 4 of the weft yarn strictly depends on the cross-sectional shape of the reinforcing fiber yarn 2.
- the length L of the auxiliary yarn 4 of the weft yarn is a length measured in a state where the reinforcing fiber yarns 2 are integrated only by the auxiliary yarn 4 of the weft yarn.
- the unidirectionally reinforced fiber base material of the present invention has an adhesion amount of 2 g / m 2 or more and 40 g / m 2 or less on at least one surface of the adhesive resin having a glass transition temperature Tg of 0 ° C to 95 ° C.
- the reinforcing fiber yarns 2 are integrated with each other by the adhesive resin in addition to the auxiliary yarn 4 of the weft yarn.
- the weft yarn 4 does not sag and the gap S between the adjacent reinforcing fiber yarns 2 is maximized, so that they are mutually in the width direction of the reinforcing fiber yarns.
- a measuring microscope that can measure with an accuracy of 0. Olmm in the pulled state, measure the weft thread auxiliary thread length L at 50 power points and use the average value as the weft thread auxiliary thread L length. .
- the adjacent reinforcing fiber yarns 2 of the unidirectional reinforcing fiber base material are in a state where the adhering by the adhesive grease is removed. Thus, it can be measured in the same manner as described above.
- the width H of the reinforcing fiber yarn 2 was also measured by measuring the width H of the reinforcing fiber yarn at 50 power points using a measuring microscope capable of measuring with an accuracy of 0. Olmm. The value was defined as the width H of the reinforcing fiber yarn.
- FIG. 3 shows that the reinforcing fiber yarn 2 is moved by the gap S in the direction parallel to the fiber direction. The state is shown.
- FIG. 4 is a schematic plan view showing how the reinforcing fiber yarn 2 moves.
- FIG. 4 (a) a gap S adjusted by the length L of the auxiliary yarn 4 of the weft yarn is provided between the adjacent reinforcing fiber yarns 2. 2 shows that it can move in parallel to the adjacent reinforced fiber yarn.
- FIG. 4B shows that the gap S between the adjacent reinforcing fiber yarns 2 becomes narrower as the reinforcing fiber yarns 2 move.
- FIG. 4 (c) shows that the reinforcing fiber yarn 2 can be moved until it comes into contact with the adjacent reinforcing fiber yarn!
- the unidirectionally aligned reinforcing fiber substrate 1 has the in-plane shear deformation because the reinforcing fiber yarns 2 constituting the unidirectionally aligned reinforcing fiber substrate 1 can move relative to each other.
- It is a base material that can be used.
- the auxiliary yarn 3 for warp is arranged between the reinforcing fiber yarns 2 so that the reinforcing fiber yarns 2 move and the interval between the adjacent reinforcing fiber yarns 2 is increased. Even if it is narrow, it is preferable because a resin injection path can be secured between the reinforcing fiber yarns 2 that are not in close contact with each other.
- the in-plane shear strain of the unidirectionally reinforced fiber base material of the present invention is the angle shown in (c) of FIG.
- the in-plane shear strain amount is an amount representing the distance that the reinforcing fiber yarn 2 has moved in parallel within the gap S. Specifically, in the adjacent reinforcing fiber yarn 2 in the state before moving (Fig. 4 (a)), A and A ', which are substantially the same locations, are moved after moving. In the state (Fig. 4 (c)), when A and B, the angle between the straight line connecting A and A 'and the straight line connecting A and B is the in-plane shear strain amount ⁇ .
- the in-plane shear strain amount ⁇ may be measured in the unidirectional reinforcing fiber base material before adhesion of the adhesive resin.
- the weft yarns 4 are not slackened, and the reinforcing fiber yarns are mutually connected so that the gap S between the adjacent reinforcing fiber yarns 2 is maximized.
- the line connecting the longitudinal ends A and B of the reinforcing fiber yarn and the line connecting the longitudinal ends A and A 'of the reinforcing fiber yarn before moving the reinforcing fiber yarn was measured, and the average value was defined as the in-plane shear strain ⁇ .
- the tilt angle of the weft yarn is also possible to measure the tilt angle of the weft yarn as the in-plane shear strain amount ⁇ . .
- the adhesive resin glass transition temperature Tg of 0 ° C or below over 95 ° C is attached by adhesion amount 2GZm 2 more 40GZm 2 or less It is characterized in that the attached form is a dot, line or discontinuous line.
- the adhesion of the adhesive resin to the cover allows the reinforcing fiber base material to be laminated based on a predetermined lamination structure, and then reinforced when forming a preform with a predetermined shape.
- peeling between the reinforcing fiber substrate layers can be suppressed, and the handleability of the preform can be greatly improved.
- adheresion means that the adhesive resin is applied prior to the lamination of the fiber-arranged reinforced fiber base material having no adhesive resin.
- "" Means that the unidirectionally arranged reinforcing fiber bases to which the above-mentioned adhesive resin is applied are laminated, and then the reinforcing fiber base layers of the laminate are integrated via an adhesive resin. If the Tg of the adhesive resin is less than 0 ° C., the adhesive resin is sticky at room temperature, which makes it difficult to handle a unidirectionally reinforced fiber base material.
- the glass transition temperature Tg of the adhesive resin exceeds 95 ° C, there is no stickiness at room temperature, but it is necessary to increase the heating temperature for bonding the reinforcing fiber substrates to each other. It will be difficult to do.
- the glass transition temperature Tg mentioned here refers to a value measured by a differential scanning calorimetry (DSC).
- the material for the primary structural material of the aircraft is preferably the residual compressive strength after impact so that it is not easily affected by the impact of the flying object or the damage of the tool during the repair. (Compression After Impact, hereinafter referred to as CAI) is required to be high.
- the adhesive resin adheres to the surface of the reinforcing fiber base, it is contained between the layers of the reinforcing fiber base constituting the FRP even after the FRP is formed. Interlayers are easier to form than when not used. Since this interlayer contains the adhesive resin in addition to the matrix resin, it is possible to selectively make the interlayer highly tough when a high-toughness thermoplastic resin is used for the adhesive resin. It is. CAI can be improved by absorbing the energy by deforming or breaking the interlayer when the shock is applied to FR p due to the strong toughness between the layers. For this reason, it is possible to improve not only the adhesiveness but also the shock-absorbing property by optimizing the adhesive resin adhered to the surface of the reinforcing fiber substrate.
- the adhesion amount of the adhesive resin is less than 2 gZm 2 , the adhesion amount is too small and sufficient adhesiveness is not exhibited. On the other hand, if the amount of adhesion is greater than 0 g / m 2 , the amount of adhesion will be too large, increasing the weight of FRP and impairing weight reduction.
- thermosetting resin As the adhesive resin that adheres to the surface of the reinforcing fiber substrate, a thermosetting resin, a thermoplastic resin, or a mixture thereof can be used. When only adhesiveness as a preform is required, it is possible to use thermosetting resin or thermoplastic resin alone as a coverable adhesive resin, such as CAI. When impact resistance is required! When using a mixture of a thermoplastic resin with excellent toughness and a thermosetting resin that is easily reduced in viscosity and easily bonded to a reinforcing fiber substrate, It has adhesiveness to the reinforcing fiber substrate while having appropriate toughness.
- thermosetting resin examples include epoxy resin, unsaturated polyester resin, vinyl ester resin, and phenol resin.
- Thermoplastic resins include poly (vinyl acetate), polycarbonate, polyacetal, poly (phenoxide), poly (vinyl acetate).
- ⁇ ⁇ ⁇ -lenssulfide, polyarylate, polyester, polyamide, polyamideimide, polyimide, polyetherimide, polysulfone, polyethersulfone, polyetheretherketone, polyaramid, polybenzimidazole, polyethylene, polypropylene, cellulose acetate, etc. can do.
- the adhesion form of the adhesive resin to be adhered to the reinforcing fiber base is a dot, a line, or a discontinuous line.
- a continuous fiber cloth such as a nonwoven fabric or a woven fabric is bonded to the surface of the reinforcing fiber base and then heat-sealed.
- the unidirectionally aligned reinforcing fiber base material of the present invention is shaped by forming the unidirectionally aligned reinforcing fiber base material by allowing the reinforcing fiber yarns to move by providing a gap between the reinforcing fiber yarns. It improves the performance. For this reason, as described above, even if a dotted, linear, or discontinuous linear adhesive resin is adhered to the entire surface of the reinforcing fiber base, the shape that requires in-plane shear deformation on the reinforcing fiber base In the case of sizing, the binding between the reinforcing fiber yarns due to the adhesive resin can be easily removed, and the reinforcing fiber yarns can move between the predetermined gaps. It is preferable because the shaping performance can be expressed. Therefore, the maximum adhesion amount of the adhesive resin is preferably 40 g / m 2 or less. From the same viewpoint, it is more preferably 30 gZm 2 or less.
- the present invention is preferably used as a planar reinforcing fiber substrate laminate obtained by laminating a plurality of the unidirectionally arranged fiber reinforced substrates based on a predetermined lamination configuration.
- the reinforcing fiber base laminate of the present invention is a material used for producing a preform.
- the reinforcing fiber base material of the present invention There is no problem in using the laminated body by wrapping the laminated body around a paper tube or the like in order to improve the handleability as a material.
- the planar laminated body may be wound around a paper tube or the like, but may return to a flat shape when unwound (unwinding the state wound around the paper tube or the like).
- a reinforcing fiber base laminate is wound around a paper tube and then unwound, a slight amount of curling remains, and it is assumed that it will not be a strict flat surface.
- the substrate laminate has a primary curved surface shape and is more than a paper tube with a radius of curvature at 50% or more, it shall be regarded as a flat surface.
- the unidirectionally reinforced fiber base material of the present invention is used by forming a preform by forming and shaping a plurality of sheets based on a predetermined laminated structure that is not used alone.
- the laminated body is shaped using a shaping mold.
- the workability of the surface is also preferable, but the conventional unidirectionally reinforced fiber base material has poor shaping performance, so it is possible to form a planar laminate using a shaping mold having a complicated shape.
- the preforms were molded by placing them one by one along the shaping mold based on a predetermined lamination structure. Since the reinforcing fiber base material of the present invention has excellent shaping performance as described above, it is possible to form a laminated body in which a plurality of layers are laminated using a shaping mold even in a complicated shape. Become. Thus, the use of the reinforcing fiber base laminate of the present invention is preferable because workability during preform molding can be greatly improved and working time can be shortened.
- a planar reinforcing fiber substrate laminate is a normal unidirectionally arranged reinforcing fiber that is not a preform obtained by shaping a reinforcing fiber substrate into a desired shape and laminating it.
- a planar reinforcing fiber obtained by laminating a base material is a base material laminate, which is a precursor of a preform.
- the adhesive resin adhering to the strong reinforcing fiber base laminate is partially bonded over the entire surface of the reinforcing fiber base on the opposite side (opposite side), and each adhesive part has The maximum length is not less than lmm and the width of reinforcing fiber yarn is not more than H. is there.
- the reinforcing fiber base laminate of the present invention a part of the adhesive resin adhering to the entire surface of the unidirectionally arranged reinforcing fiber base material in the form of dots, lines, or discontinuous lines is facing.
- the reinforcing fiber is formed by being integrated, that is, bonded to the base material, and has a maximum length force S 1 mm of the bonded portion and a width H of the reinforcing fiber yarn or less.
- FIG. Fig. 8 (a) shows a reinforced fiber made by laminating 4 ply of the reinforcing fiber base material of the present invention in which the adhesive resin 33 is adhered in the form of dots, lines, or discontinuous lines over the entire surface of the unidirectionally arranged reinforcing fiber base material 32.
- a state in which the base material laminate 19 is disposed between the upper and lower bonding jigs 22 and 23 having a plurality of independent pressure parts 24 is shown.
- the adhesive resin 33 adheres to the unidirectionally reinforced reinforcing fiber base material 32 located at the upper portion and V.
- the unidirectionally aligned reinforcing fiber base material 32 is bonded, and therefore, when the unidirectionally aligned reinforcing fiber base material 32 is lifted, It can be confirmed that the adhesive resin 33 adheres to the entire back surface.
- the bonding jig upper 22 and the bonding jig lower 23 and the reinforcing fiber substrate laminate 19 before bonding the bonding jig upper 22 and the bonding jig are bonded.
- the reinforcing fiber base laminate 19 is pressed and integrated. More preferably, the heating temperature is at least + 5 ° C of the glass transition temperature of the adhesive resin used.
- the adhesive resin is attached to the fiber substrate 32 in the form of dots, lines, or discontinuous lines, all the adhesive resin adheres to the fiber array substrate 32 Of the adhesive resin Adhesion to the reinforcing fiber base material is only partially performed over the entire surface, which means that only the adhesive resin 34 is adhered to the unidirectionally arranged reinforcing fiber base material 35.
- the reinforcing fiber base laminate of the present invention is preferably partially bonded over the entire surface of the reinforcing fiber base as described above.
- the reinforcing fiber yarns cannot move during shaping, which is not preferable because the shaping performance of the reinforcing fiber substrate of the present invention cannot be expressed sufficiently.
- the adhesive resin adhered to the surface of the reinforcing fiber substrate of the present invention is partially bonded, and the maximum length of each bonded portion is 1 mm or more and the reinforcing fiber yarns are It is preferable that the width H or less. If the maximum length is less than lmm, the length of the bonded part is too short and the bonding is not sufficient.
- the bonded portion when the length of the bonded portion is larger than the width H of the reinforcing fiber yarn, the bonded portion often spans between the reinforcing fiber yarns. In the bonded portion, the reinforcing fiber yarn is formed during shaping. This is not preferable because it is hindered from moving, and sufficient shaping performance cannot be exhibited.
- the interval between the bonded portions is preferably not less than the width H of the reinforcing fiber yarn and not more than 100 mm. If the distance between the bonded portions is less than the width H of the reinforcing fiber yarn, even if the maximum length of the bonded portion is H or less, the bonded portion often extends between the reinforcing fiber yarns, and the reinforcing fiber base There is a concern that the shaping performance of the material, that is, the shaping performance of the reinforcing fiber substrate laminate, may not be fully expressed. On the other hand, if the interval between the bonded portions is larger than 100 mm, the bonding interval is too wide, so that the effect of partial bonding is not sufficiently exhibited.
- the reinforced fiber substrate laminate of the present invention preferably has a laminated structure constituting the FRP, but if the number of laminated layers constituting the FRP is very large, the reinforcing fiber
- the base material laminate may be a laminated structure constituting a part of the laminated structure constituting the FRP. For example, if the stacked configuration of FRP is [(45Z0Z— 45Z90)] (X
- the reinforcing fiber base laminate of the present invention is excellent in formability and handleability.
- a preform is a plane.
- it means an intermediate that is shaped like a shape of the final product or a shape close to it using a shaping mold or similar mold.
- the preform of the present invention is obtained by shaping a reinforced fiber substrate laminate that also serves as a unidirectionally aligned reinforced fiber substrate of the present invention, and has a reinforcing fiber volume content Vpf of 45% or more. It is preferable to be within the range of% or less.
- the reinforcing fiber volume content Vpf is less than 45%, the preform becomes bulky, which is not preferable because the reinforcing fiber volume content of the FRP as a molded product is lowered. Also, when trying to reduce the bulk of the preform and compressing it before injecting the matrix resin, especially where the curvature is present, a part where the thread snakes partially occurs, resulting in a molded product. This is not preferable because the physical properties of FRP are reduced. On the other hand, when the reinforcing fiber volume content Vpf is larger than 62%, it is difficult to impregnate the matrix resin, and defects such as voids are likely to occur when not impregnated.
- the reinforcing fiber volume content of the preform is such that the reinforcing fiber base laminate is shaped using a shaping mold and then heated to a temperature higher than the glass transition temperature of the adhesive resin. It can be improved by applying pressure for a certain period of time. In this case, the reinforcing fiber volume content can be improved as the heating temperature and the heating with higher pressure and the pressurizing time are longer. By appropriately controlling the heating temperature, pressure, and heating / pressing time, the reinforcing fiber volume content of the preform can be controlled.
- the preform of the present invention is characterized in that the reinforcing fiber base material layer is bonded over substantially the entire surface.
- a preform is formed by arranging the reinforcing fiber base laminate in a shaping mold, and then covering the entire laminate with a paguinda film, and vacuuming between the pugging film and the laminate to form the entire laminate. By applying atmospheric pressure, the stack is made in close contact with the shaping mold.
- a preform can be produced by applying pressure to the laminate using a shaping mold and a press.
- the preform Since it can be adjusted to the final product or a shape close to it, once the shape is adjusted, the shape must be maintained until Matrix resin is injected and formed into FRP.
- the reinforcing fiber base layer is bonded substantially over the entire surface. This is preferable because the shape of the preform can be easily maintained.
- the reinforcing fiber base material layer is bonded over the entire surface before the preform (an intermediate product having the shape of the final product or a shape close thereto) as defined in the present invention is formed, the reinforcing fiber Since the movement between yarns is restricted, sufficient shaping performance cannot be achieved and a good preform cannot be obtained! /.
- the strong planar reinforcing fiber substrate laminate is shaped into the shape of the preform (the shape of the final product or an intermediate having a shape close thereto) as referred to in the present invention.
- the adhesive resin does not adhere to the entire surface of the reinforcing fiber base, and the maximum length of lmm or more of the reinforcing fiber yarn It is characterized in that it is partially bonded with a width of H or less, and after forming into a preform shape, the reinforcing fiber substrate layer is bonded over the entire surface to maintain the preform shape.
- the method for producing a reinforced fiber base laminate of the present invention is characterized in that it is produced through at least the following steps (A) to (F).
- the ⁇ predetermined shape of the unidirectionally reinforced fiber base material '' in (A) means a shape in which the unidirectionally reinforced fiber base material has a fiber orientation at a stacking angle of each layer, and has a constant width and a continuous length. is there.
- the "predetermined laminated structure" in (B) is a common laminated structure for each member to which the reinforcing fiber base laminate is applied. This is because the reinforcing fiber base laminate can be used for more members by manufacturing the reinforcing fiber base laminate having a common laminated configuration.
- FIG. 5 shows an embodiment of the manufacturing apparatus of the present invention, and the manufacturing method will be described.
- a commercially available automatic cutting machine 5 can be used for the cutting of the unidirectionally reinforced fiber base material in the cutting step (A).
- the cut unidirectionally arranged reinforcing fiber base material 6 is preferably transported and arranged at a predetermined position on the conveyor 8 using the robot arm 7.
- a hand device 9 capable of holding the unidirectionally reinforced fiber base material 6 is attached to the tip of the robot arm 7.
- the hand device 9 is not particularly limited as long as it has a function capable of carrying and arranging without damaging the quality of the unidirectionally reinforced fiber base material 6.
- a hand device using a vacuum suction device or a blower device is preferable because there is no concern of degrading the quality of the reinforcing fiber base material that does not hook the reinforcing fiber base material with pins or the like.
- a reinforcing fiber substrate having a lamination angle of 45 ° having a continuous length is prepared by arranging a reinforcing fiber substrate having a lamination angle of 45 ° in a space adjacent to the unidirectionally arranged reinforcing fiber substrate 6.
- a reinforcing fiber substrate having a lamination angle of 0 ° is arranged on the reinforcing fiber substrate having a lamination angle of 45 ° based on the lamination configuration.
- the 0 ° reinforcing fiber substrate is preferably arranged and laminated directly from the raw material roll 10 without cutting.
- the conveyor is operated in the same way, and the 45 ° / 0 ° reinforcing fiber base material is laminated, and then the 45 ° one direction cut by the automatic cutter 11
- the array reinforcing fiber substrate 12 is conveyed and laminated.
- a 90 ° unidirectionally reinforced fiber base material 14 cut by an automatic cutter 13 a 45 ° unidirectional reinforced fiber base material 16 cut by an automatic cutter 15, and a roll 17 at 0 °.
- the reinforcing fiber base material is cut, transported, and laminated based on the laminated structure.
- each reinforcing fiber substrate can be conveyed to a predetermined position on the conveyor.
- reinforcing fiber bases may be cut by a single automatic cutter, the reinforcing fiber bases of each lamination angle are cut using a plurality of automatic cutters as shown in Fig. 5. This is preferable because the time required for the cutting process can be shortened.
- the reinforced fiber base material based on a predetermined laminated configuration is automatically cut with an automatic cutter, conveyed with a robot arm, laminated, and moved with a conveyor repeatedly, automatically and continuously with high accuracy. Since a reinforcing fiber base material can be laminated on the substrate, it is preferable. As such accuracy, it is preferable that the deviation of the fiber orientation angle of the unidirectionally reinforced fiber base material is within ⁇ 1 °, and the gap between adjacent reinforcing fiber bases in the same laminate is not less than Omm and not more than 3 mm.
- the reinforcing fiber orientation angle of the reinforcing fiber substrate deviates by more than 1 ° with respect to the stacking angle specified by the predetermined stacking configuration, the mechanical properties may not be exhibited as desired, which is not preferable.
- the laminate configuration it is necessary to arrange the reinforcing fiber bases adjacent to each other in the same stack. In this case, the gap between the reinforcing fiber bases is smaller than 0 mm. In other words, it is not preferable to overlap, because the number of stacked layers increases and the thickness increases.
- the gap is larger than 3 mm, there is no reinforcing fiber only in that part, so that the mechanical properties are deteriorated, or there is a part where the composition ratio of the resin is significantly larger than the part where the reinforcing fiber is normally present. Inconvenience such as formation may occur, which is not preferable.
- the laminate obtained in the lamination process (B) is transported to the heating process (D).
- the reinforced fiber base material laminate 19 having a predetermined laminated configuration arranged on the conveyor 8 is conveyed into the oven 20 by intermittently operating the conveyor 8 in the traveling direction. Is done. Since the laminated bodies laminated in a predetermined laminated structure are not yet integrated, it is difficult to carry a laminated body having a continuous length without shifting the lamination angle. After laminating the materials, it is preferable to convey the material continuously and evenly. By adopting a forceful means, it is possible to transfer to a heating process and a pressure bonding process that can shift the stacking angle.
- the end portion or the like may be temporarily sewn with a sewing machine or the like.
- Temporarily fixing is one of the preferable modes.
- the reinforcing fiber base material laminate of the present invention is removed by bonding a predetermined portion over the entire surface of the laminate in the subsequent pressure bonding process and then cutting off and removing the temporarily stitched end. You can get a body.
- the laminate obtained in the lamination step (B) is heated at a predetermined temperature described later.
- a hot-air oven is preferable because it can heat the reinforcing fiber base without contact.
- the range to be bonded is selectively heated using an oven 20 as shown in FIG.
- an oven 20 to selectively heat the area to be bonded, the heating conditions not only improve heating efficiency but also reduce the size of the heating equipment and attach it to the conveyor. However, it is preferable because it has advantages such as easy.
- the heating is uniformly performed in the entire pressure bonding portion after the laminate.
- the temperature is not uniform in the thickness direction, and it is not preferable because the heating of the adhesive resin that adheres to the surface of the reinforcing fiber substrate does not become uniform and the adhesiveness in the thickness direction varies.
- uniform means within ⁇ 5 ° C. More preferably, it is within ⁇ 3 ° C.
- the measurement method is not particularly limited, but a thermocouple is placed between the surface layer and the lamination layer of the laminate at a typical heating location of the laminate, heat treatment is performed, and the overheating state of the laminate is monitored. Can be measured.
- the predetermined temperature at the time of heating is that the adhesive resin adheres only to the surface on one side of the reinforcing fiber base! / ,!
- the glass transition temperature of the adhesive resin is preferably higher than Tg.
- the heating temperature is higher than the glass transition temperature of the adhesive resin, the adhesive resin is softened. Therefore, in the pressure bonding step (E), bonding can be performed more reliably at a lower pressure, which is preferable.
- the glass transition temperature is Tg + (5 to 20) ° C.
- the adhesive resin is attached only to the surface of one side of the reinforcing fiber base, the adhesive resin is a reinforcing fiber constituting the reinforcing fiber base in the laminated body of the reinforcing fiber base. It will adhere to the surface of the yarn. Heating below the glass transition temperature Tg makes it difficult to bond well in the pressure bonding process (E) after the adhesive resin has insufficient adhesion to the reinforced fiber yarn. It is preferable to heat it to a temperature higher than the glass transition temperature Tg of the adhesive resin in the case where V adheres only to the surface on one side of the fiber base material.
- the heating temperature of the reinforcing fiber substrate laminate may be equal to or lower than the glass transition temperature Tg of the adhesive resin.
- the heating temperature of the reinforcing fiber base laminate is the glass transition temperature of the adhesive resin ( Tg-30) ° C or higher and glass transition temperature Tg or lower.
- FIG. 6 shows an example of the pressure bonding process of the present invention.
- FIG. 6 shows a cross section of the pressure bonding jig 21, the reinforcing fiber base laminate 19 and the conveyor 8 installed in the oven 20 shown in FIG.
- the reinforcing fiber substrate laminate 19 on the conveyor 8 is transported to the pressure bonding jig 21 installed in the oven by operating the conveyor 8.
- the pressure bonding jig 21 includes a bonding jig upper part 22 and a bonding jig lower part 23, and the pressure bonding jig upper part 22 has a plurality of independent pressing parts 24 having a convex shape over the entire surface. preferable.
- the heating conditions in the heating step (D) and the pressure conditions of the pressure bonding jig 21 are controlled, whereby each of the reinforcing fiber base material laminates can be formed.
- Directional alignment Adhesive resin adhering to the reinforcing fiber substrate can be partially glued to the facing unidirectionally aligned reinforcing fiber substrate.
- each independent pressure part 24 is such that the maximum length of the cross-section is 1 mm or more and the width H or less of the reinforcing fiber yarn, so that the maximum length of each bonded portion of the reinforcing fiber base laminate is Can be less than lmm and less than width H of reinforcing fiber yarn.
- the cross-sectional shape of the pressurizing unit 24 various shapes such as a circular shape, a square shape, a rectangular shape and the like which are not particularly specified can be used.
- the distance between the pressure parts 24 is set to be not less than the width H of the reinforcing fiber yarn and not more than 30 mm. If the interval between the pressurizing parts 24 is less than H, too many bonded portions of the reinforcing fiber base laminate are formed, which is not preferable. On the other hand, if the interval between the pressure parts 24 is larger than 30 mm, there are too few bonded portions, which is not preferable.
- the pressure bonding jig 21 is preferably made of metal and has a heat generating function.
- the heat generation method is not particularly limited, but examples thereof include an electric heater or a hot water or hot oil line in the pressure bonding jig 21. It is preferable to make the pressure bonding jig 21 made of metal, because the heating efficiency by the heat generation method or the oven 20 can be improved. Further, it is preferable that the pressurizing unit 24 be removable from the standpoints of adjusting maintenance and changing the pressurizing conditions. [0141] Further, the cross-sectional shape of the pressure part 24 in the pressure bonding jig 22 is circular, the diameter is equal to or less than the width H of the reinforcing fiber yarn, and the distance between the adjacent pressure parts is H. It is preferable that it is 30 mm or less.
- the cross-sectional shape of the pressure part is a square or a triangle, it is not preferable because there is a concern that the reinforcing fiber yarn may be damaged at the apex edge of the cross-sectional shape of the pressure part in the pressure bonding process.
- the pressing portion of the bonding jig has a heating function.
- a pipe for the heat medium flow path is installed in the bonding jig, and the heat treatment heated by the mold temperature controller is passed through the pipe for the heat medium flow path, thereby fixing the adhesive. For example, heating the pressurizing part of the tool.
- the heating time can be shortened compared with the case of heating with hot air such as an oven, and More preferable, because the temperature control of heating is easy.
- the adhesive resin bonding the reinforcing fiber substrates heated in the heating step (D) and the pressure bonding step (E) is cooled.
- a cooling space 26 for cooling the reinforcing fiber substrate laminate at room temperature is provided between the oven 20 and the take-up roll 25, so that the bonding is completed by cooling at room temperature.
- it is a step of winding with a roll 25 for winding.
- the winding tool 25 is not particularly limited as long as it can wind up the reinforcing fiber base laminate, and can be used with a paper tube having an appropriate diameter. The diameter is 50 to 150 cm. It is preferable.
- steps (A) to (F) are preferably carried out continuously using a conveyor because a reinforcing fiber substrate laminate having a continuous length can be produced.
- the reinforcing fiber substrate laminate obtained as described above can be wound around a roll 25 as necessary.
- the end of the reinforcing fiber base laminate can be sewn with a sewing machine, etc. It is possible to prevent the reinforcing fiber base laminate from being scattered.
- the reinforcing fiber base laminate can exhibit a predetermined shaping performance by removing the sewn end as necessary. As a matter of course, it is possible to store it in the state of a flat reinforcing fiber substrate laminate and use it in the next process without winding.
- the preform production method of the present invention is to produce a preform through at least the following steps (a) to (d).
- a reinforcing fiber substrate laminate obtained by laminating a plurality of reinforcing fiber substrates made of unidirectionally arranged reinforcing fiber substrates is cut into a predetermined shape. After that, place it on the shaping mold.
- a plurality of the reinforcing fiber substrate laminates can be arranged and laminated. It is also possible to arrange and laminate a reinforcing fiber substrate laminate and a reinforcing fiber substrate alone.
- a surface pressure is applied to the reinforcing fiber base laminate to give the shaping mold Shape it.
- the method of applying the surface pressure is not particularly limited, but the reinforcing fiber substrate laminate and the shaping mold are sealed with a sheet made of a plastic film or various rubbers, and the sealed interior is vacuum-sucked to obtain the surface pressure. It is preferable to use a vacuum pugging method in which a film or the sheet is brought into close contact with the reinforcing fiber base laminate and the reinforcing fiber base laminate is shaped into a shaping mold by atmospheric pressure.
- the reinforcing fiber base laminate 28 is placed on the shaping mold 27.
- the surface of the shaping mold 27 is subjected to mold release treatment as necessary.
- the shaping mold is covered with a plastic film or a sheet 29 made of various rubber covers, and the reinforcing fiber base laminate 28 is covered, and the end portion and the shaping mold are sealed with a sealant 30 or the like.
- the space 31 formed by the film or sheet and the shaping mold is depressurized by vacuum suction using a vacuum pump or the like, and the atmospheric pressure is applied to the reinforcing fiber substrate laminate through the sheet 29 and shaped. To do.
- the method of forming the reinforcing fiber base laminate 28 by applying atmospheric pressure to the reinforcing fiber base laminate 28 using the plastic film or the sheet 29 having various rubber forces as described above is performed by using the reinforcing fiber base laminate 28. Since uniform pressure can be applied, disorder of reinforcing fiber yarns and variation in preform thickness can be suppressed during press forming, which is preferable.
- the pressurizing and heating bonding step (c) surface pressure is applied to the reinforcing fiber substrate laminate that has been formed into a preform shape in the pressurizing and shaping step (b) and heated.
- the adhesive fiber base material between the laminated layers of the reinforcing fiber base material laminate is adhered to the entire surface using an adhesive resin that adheres to the surface of the reinforcing fiber base material.
- the shape of the reinforcing fiber base laminate can be utilized to make a preform shape, and then the reinforcing fiber base can be bonded. It is possible to produce a preform that can be shaped into a shape and has excellent shape retention.
- the whole of the reinforcing fiber base laminate is oven-treated as it is.
- a method of heating and pressurizing the entire reinforced fiber base material laminate by heating in, for example, is mentioned.
- the preform can be formed by heating in an oven or the like as it is.
- the heating temperature is preferably equal to or higher than the glass transition temperature of the adhesive resin that adheres to the surface of the reinforcing fiber substrate.
- the adhesive resin is softened, so that it is possible to bond more reliably at a lower pressure, which is preferable.
- the glass transition temperature is Tg + (5 to 20) ° C. More preferably, the temperature is higher than the heating temperature in the heating step of the reinforcing fiber base laminate.
- the preform is cooled in the cooling step (d).
- the cooling temperature is preferably equal to or lower than the glass transition temperature of the adhesive resin adhering to the surface of the reinforcing fiber substrate.
- the adhesive resin when heated to a temperature higher than the glass transition temperature of the adhesive resin, the adhesive resin softens. If there is a gap between the layers, or if the adhesive resin is shaped so that it touches the shaping mold, the adhesive resin is likely to be in close contact with the shaping mold. Since there is a concern that it is difficult to remove from the shaping mold, it is not preferable.
- a method for cooling it is possible to use a method such as exposing the preform to room temperature after the pressurizing and heating adhesion step (c), or cooling the shaped mold through cold water.
- matrix resin is injected into a preform having a reinforcing fiber volume content Vpf of 45% or more and 62% or less of the present invention.
- the injection of the matrix resin is stopped and the discharge amount of the matrix resin from the vacuum suction port is adjusted so that the FRP reinforcing fiber volume content Vf is 45% or more. % Or less.
- the FRP needs a thickness in order to exhibit the predetermined mechanical properties with low strength and elastic modulus, resulting in a light weight. Since there is a concern that the effect of acupuncture will be small, it is preferable.
- the reinforcing fiber volume content Vf is higher than 72%, it is not preferable because defects such as voids are liable to occur because the amount of the matrix resin is too small.
- the number of laminated layers of reinforcing fiber bases constituting the FRP is 20 or more, and the number of laminated layers is
- a preform with a high reinforcing fiber volume content Vf is used to mold an FRP with a relatively high reinforcing fiber volume content Vf, the preform reinforcing fiber density increases, so that the matrix fiber is impregnated. Tend to decrease. Even in this case, it is preferable to reduce the viscosity by heating the matrix resin, and to inject and impregnate it.
- the suction loca connected to the injection port is also vacuum-suctioned, and both the suction port and the conventional vacuum suction port are subjected to the vacuum.
- Tricks fat is sucked and discharged, and the volume of matrix fiber is discharged to adjust the FRP reinforcing fiber volume content Vf to 45% or more and 72% or less.
- the matrix resin When discharging the matrix resin to the suction port and Z or the conventional vacuum suction roller connected to the injection port, the matrix resin can be discharged in a shorter time by pressurizing the preform from the outside. I like it.
- the reinforcing fiber volume content Vf of the FRP is preferably adjusted to the reinforcing fiber volume content Vpf of the preform to Vpf + 20% or less.
- the volume content of reinforcing fiber in FRP is determined by the time and temperature at which the matrix resin is sucked from the suction port and Z or vacuum suction port after the matrix resin is injected into the preform, as well as external pressure applied to the preform. It is possible to control the discharge amount of matrix resin.
- the "reinforcing fiber volume content Vpf of the preform" in the present invention is a value defined and measured by the following, and the preform is a state before the injection of the matrix resin. Say.
- the reinforcing fiber volume content Vpf of the preform can be expressed by the following equation from the thickness (t) of the preform when a pressure equivalent to atmospheric pressure 0. IMPa is applied to the preform. it can.
- the pressure is changed to 0. IMPa by the thickness measuring method described in the carbon fiber fabric test method described in JIS R 7602 and measured. Can be obtained.
- the matrix resin is injected and impregnated in a state where atmospheric pressure is applied to the preform, so that the preform is strengthened when pressure of 0. IMPa equivalent to atmospheric pressure is applied. It is preferable to control the fiber volume content. If the preform has a complicated shape and cannot be measured according to JIS R 7602! / ⁇ , a sample may be cut out from the preform and measured. In this case, it is necessary to cut out the sample with care so that the thickness of the preform does not change.
- the "FRP reinforcing fiber volume content Vf" in the present invention is a value defined and measured by the following, and a state after injecting and curing a matrix resin to the preform The thing in. That is, the measurement of the reinforcing fiber volume content Vf of FRP can be expressed from the thickness (t) of FRP using the following formula in the same manner as described above.
- t is the thickness (mm) of the FRP, but the other parameters are the same as the parameter values for obtaining the reinforcing fiber volume content Vpf of the preform.
- a specific method for measuring the thickness of FRP is not particularly limited as long as it is a method that can correctly measure the thickness of FRP.
- the method conforms to JIS B 7502. It is preferable to measure with a specified micrometer or one having an accuracy equivalent to or better than that. If the FRP has a complicated shape and measurement is not possible, cut out a sample (a sample with a certain shape and size for measurement) from the FRP force, Good.
- the reinforcing fiber substrate used in the present invention has an adhesive resin attached to the surface, and the adhesive resin adheres the reinforcing fiber substrates to each other to form a reinforcing fiber substrate laminate and a preform. In addition to functions that improve handling properties such as shape retention, it also exhibits functions that improve impact resistance such as CAI. When the impact-resistant resin is expected to improve impact resistance, it is preferable that a layer containing adhesive resin is formed between the reinforcing fiber layers after molding FRP.
- the FRP reinforcing fiber volume content Vf can be improved by increasing the amount of matrix resin discharged during the production of FRP.
- the matrix resin and Z or preform are heated and injected. The heating temperature adheres to the surface of the reinforcing fiber base! When the temperature exceeds the glass transition temperature, the adhesive resin softens and falls off the surface of the reinforcing fiber base, and is placed in a matrix resin that forms the interlayer of the reinforcing fiber base. There is a case.
- the FRP reinforcing fiber volume content Vf is 45% or more and 72% or less. It is also preferable.
- a suction loci connected to the injection port is also preferable because it can reduce the matrix resin discharge time by sucking and discharging the matrix resin.
- the sample size was 300 ⁇ 300 mm, a preform was prepared as described in each example, and the reinforcing fiber volume content Vpf of the preform was determined as follows.
- the basis weight F (g / m 2 ) was measured as follows.
- the density p (g / cm 3 ) of the reinforcing fiber is the density of the reinforcing fiber yarn used in the base material and is measured in accordance with the A method of JIS R 7603.
- Preform thickness t is determined by placing the preform in a shaping mold, sealing it with a nog film, vacuuming the sealed space, and applying a pressure of 4 to the preform. Then, using a height gauge and a micrometer, the thickness and 5 thickness points at the center and 4 corners of the preform were measured to 0. Olmm.
- the thickness of the center of the preform is measured by measuring the height of the center of the preform from above the nogg film in a state where atmospheric pressure is applied to the preform. Measured by subtracting height and bag film thickness.
- the thickness of the four corners of the preform was measured in advance by measuring the combined thickness of the shaping mold, preform, and nogg film with a micrometer in a state where atmospheric pressure was applied to the preform. The thickness of the mold and the thickness of the bag film Measured by subtracting.
- FRP was prepared as described in the Examples, and the reinforcing fiber volume content of FRP was as follows:
- Vf was obtained.
- the basis weight F and the density p of the reinforcing fiber are the same as above.
- the thickness t (mm) of the FRP was determined by removing the FRP from the mold and then using the micrometer around the epoxy resin inlet and around the vacuum suction port and between the inlet and the vacuum suction port. The thickness of the three central power stations was measured to the unit of 0. Olmm.
- Reinforcing fiber volume content Vf of FRP is the base material weight F (g / m 2 ), the number of laminated base materials p (sheets), the density of reinforcing fibers p (g / cm 3 ) measured by the above method.
- a carbon fiber yarn of 2 decitex is used as a warp yarn and a 25.6 decitex coupling agent is applied to the glass fiber yarn, and 17 decitex nylon 66 filament yarn is twisted 250 times Zm
- the weft density of the weft auxiliary yarn is 3 Zcm
- the weft length L of one carbon fiber yarn is 5.6 mm
- the carbon fiber basis weight is 190 gZm 2 in a one-way non-crimp carbon fiber fabric. It produced and used as a unidirectional array reinforcement fiber base material.
- the amount of in-plane shear strain ⁇ shown in Fig. 4 of the carbon fiber woven fabric was measured as follows. First, this carbon fiber woven fabric was cut into a 100 ⁇ 100 mm square (each side was cut parallel and perpendicular to the carbon fiber yarn), and placed on the base of the optical microscope. The carbon fiber woven fabric was observed at a magnification of 25 times, and the shape of the carbon fiber woven fabric was adjusted so that the weft auxiliary yarn was not perpendicular to the carbon fiber yarn and had no slack. Next, one carbon fiber yarn was fixed, and the carbon fiber yarn adjacent to the carbon fiber yarn was slid upward to cause in-plane shear deformation.
- the carbon fiber yarn When the carbon fiber yarn is slid, it is arranged in a direction perpendicular to the arrangement direction of these two carbon fiber yarns, and the weft yarn is inclined with respect to the arrangement of the carbon fiber yarns, The gap between the fiber yarns narrowed, and finally the carbon fiber yarns came into contact with each other. This state was photographed, and the angle ⁇ (in-plane shear strain amount) formed by the direction in which the inclined weft yarns and the carbon fiber yarns were arranged and perpendicular was measured, and ⁇ was 15 °.
- This fabric substrate is cut into a fabric substrate having a width of lm and a length of lm having a fiber direction angle of 45 °, 0 °, 45 °, 90 °, and 45 ° direction.
- Laminates were prepared by sequentially laminating in the 0 °, 45 °, 90 °, 90 °, –45 °, 0 °, and 45 ° directions. This laminate was placed on a flat plate made of aluminum alloy and heated in an oven having an ambient temperature of 80 ° C.
- the pitch cross section of one of the pressing is at lmm 2 is arranged an adhesion jig made of aluminum alloy 10mm on the stacked body on the adhesive jig further, one A load was applied so that the pressure applied to the pressurizing part of the wire was 0. IMPa, and the part corresponding to the pressurizing part of the bonding jig was pressed to adhere to the surface of the fabric substrate.
- the woven fabric base materials in the pressurizing part were bonded to each other in the thickness direction by slagging.
- a laminate of carbon fiber woven fabric base material was obtained.
- the laminated body obtained in Example 1 was placed in an iron shaping mold having a shape of a part of a sphere having a length of a string having a secondary curvature of 350 mm and a curvature of 800 mm, and a silicon rubber having a thickness of 1.5 mm.
- the end of the silicon rubber is adhered to the shaping mold using a sealant, and the space formed by the shaping mold and the silicon rubber is vacuum sucked with a vacuum pump to form the laminate. Pressurized to form.
- the obtained preform was bonded between the carbon fiber woven fabric base material, and the shaped shape was well maintained.
- a preform was produced in the same manner as in Example 2 except that an iron shaping die having a shape of a part of a sphere having a length of 350 mm and a curvature of 400 mm was used as the shaping die. did.
- the preform reinforcing fiber volume content Vpf was measured in the same manner as in Example 2. As a result, the preform reinforcing fiber volume content Vpf was 52%.
- Example 2 The preform produced in Example 2 was placed in a mold, and epoxy resin was injected to perform RTM molding.
- the epoxy resin is injected until the entire epoxy resin is impregnated with the epoxy resin. After the epoxy resin is discharged from the vacuum suction roller, the injection port is closed and the epoxy resin is injected. Canceled. A vacuum suction line was connected to the inlet, vacuum suction was performed together with the conventional vacuum suction port, and extra epoxy resin was discharged by injecting extra.
- the vacuum suction port prepared by newly connecting the conventional vacuum suction port and injection port to the vacuum suction line was measured by measuring the thickness of the preform impregnated with epoxy resin. This was performed until the reinforcing fiber volume content Vf after molding reached a thickness corresponding to 55%. The thickness of the preform impregnated with epoxy resin was measured around the injection port and the vacuum suction port, and at the center between the injection port and the vacuum suction port.
- the epoxy resin impregnated into the preform was primarily cured at a temperature of 130 ° C for 2 hours, and then secondarily cured at a temperature of 180 ° C for 2 hours. RTM molding was performed.
- Example 4 RTM molding was performed in the same manner as in Example 4 to obtain a carbon fiber reinforced plastic.
- the reinforcing fiber volume content Vf of the FRP was measured, and as a result, the reinforcing fiber volume content Vf of the FRP was uniform at 55% at the misaligned portions.
- the surface appearance there was no noticeable wrinkles or meandering of fibers, and the surface quality was good.
- cut the carbon fiber reinforced plastic As a result, no meandering voids and voids were observed in the fiber, and the fiber was sufficiently usable as a structural material.
- Example 2 Use only the same carbon fiber reinforced yarn and weft yarn as in Example 1 without using the warp auxiliary yarn, the weft density is 3 Zcm, and the weft length over one carbon fiber yarn is 5.
- Example 2 As in Example 1, as a result of measuring the in-plane shear strain amount of this carbon fiber fabric, it was a fabric configuration with no gaps between the carbon fiber yarns. When the carbon fiber yarns cannot move and are forced to deform, the adjacent carbon fiber yarns are crushed, resulting in wrinkling.
- thermoplastic resin as in Example 1 was adhered to the upper surface of the fabric in the same manner to produce a fabric substrate.
- the thickness of the reinforcing fiber plastic was measured in the same manner as in Example 4, and the reinforcing fiber volume content Vf of the FRP was determined. As a result, the portions other than the heel portion were the reinforcing fiber volume content V f of the FRP. Was 55%. On the other hand, in the cocoon part, a part or void having a remarkably large composition ratio of slag was found in the cocoon compared to the part where the reinforcing fiber was normally present. It was impossible to determine the fiber volume content
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
- Laminated Bodies (AREA)
- Reinforced Plastic Materials (AREA)
- Woven Fabrics (AREA)
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
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JP2007511011A JP5309561B2 (ja) | 2006-02-28 | 2007-02-21 | プリフォーム用の強化繊維基材積層体の製造方法、プリフォームの製造方法および強化繊維プラスチックの製造方法 |
CN200780006892.4A CN101389457B (zh) | 2006-02-28 | 2007-02-21 | 预成型体用强化纤维基材等、以及该强化纤维基材的层合体的制造方法等 |
US12/280,903 US8236410B2 (en) | 2006-02-28 | 2007-02-21 | Reinforcing fiber base material for preforms, process for the production of laminates thereof, and so on |
BRPI0708377-7A BRPI0708377A2 (pt) | 2006-02-28 | 2007-02-21 | material de base de fibra de reforço para pré-formas, processo para a produção de laminados a partir do mesmo, e assim por diante |
CA2635855A CA2635855C (en) | 2006-02-28 | 2007-02-21 | Reinforcing fiber base material for preforms, process for the production of laminates thereof, and so on |
EP07714657.9A EP1990169B1 (en) | 2006-02-28 | 2007-02-21 | Process for the production of laminates of reinforcing fiber base material |
ES07714657T ES2705448T3 (es) | 2006-02-28 | 2007-02-21 | Proceso para la producción de laminados de material base de fibra de refuerzo |
Applications Claiming Priority (2)
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JP2006052460 | 2006-02-28 | ||
JP2006-052460 | 2006-02-28 |
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WO2007099825A1 true WO2007099825A1 (ja) | 2007-09-07 |
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PCT/JP2007/053157 WO2007099825A1 (ja) | 2006-02-28 | 2007-02-21 | プリフォーム用の強化繊維基材など、およびその強化繊維基材の積層体の製造方法など |
Country Status (9)
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US (1) | US8236410B2 (ja) |
EP (1) | EP1990169B1 (ja) |
JP (1) | JP5309561B2 (ja) |
CN (1) | CN101389457B (ja) |
BR (1) | BRPI0708377A2 (ja) |
CA (1) | CA2635855C (ja) |
ES (1) | ES2705448T3 (ja) |
RU (1) | RU2419540C2 (ja) |
WO (1) | WO2007099825A1 (ja) |
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US20140186575A1 (en) * | 2009-02-02 | 2014-07-03 | Toray Industries, Inc. | Process and apparatus for producing reinforcing-fiber strip substrate having circular-arc part, and layered structure, preform, and fiber-reinforced resin composite material each comprising or produced using the substrate |
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KR102496240B1 (ko) | 2015-03-19 | 2023-02-06 | 도레이 카부시키가이샤 | 시트상 강화 섬유 기재, 프리폼 및 섬유 강화 수지 성형품 |
KR20170129715A (ko) * | 2015-03-19 | 2017-11-27 | 도레이 카부시키가이샤 | 시트상 강화 섬유 기재, 프리폼 및 섬유 강화 수지 성형품 |
JPWO2016147646A1 (ja) * | 2015-03-19 | 2017-12-28 | 東レ株式会社 | シート状強化繊維基材、プリフォームおよび繊維強化樹脂成形品 |
JP2018516790A (ja) * | 2015-06-12 | 2018-06-28 | セントレ テクニーク デ インダストリーズ メカニークスCentre Technique Des Industries Mecaniques | 熱可塑性複合プリフォーム(preform)の製造ユニットおよび製造方法 |
JP2017014367A (ja) * | 2015-06-30 | 2017-01-19 | 三菱航空機株式会社 | 複合材料の製造に用いられる繊維織物および当該繊維織物を用いた複合材料製造方法 |
JPWO2017159567A1 (ja) * | 2016-03-16 | 2019-01-17 | 東レ株式会社 | 繊維強化プラスチックの製造方法および繊維強化プラスチック |
WO2017159567A1 (ja) * | 2016-03-16 | 2017-09-21 | 東レ株式会社 | 繊維強化プラスチックの製造方法および繊維強化プラスチック |
US11768193B2 (en) | 2019-12-20 | 2023-09-26 | The Research Foundation For The State University Of New York | System and method for characterizing the equibiaxial compressive strength of 2D woven composites |
JP7395219B1 (ja) * | 2023-05-23 | 2023-12-11 | 株式会社The MOT Company | 繊維強化樹脂中空又は複合成形体 |
Also Published As
Publication number | Publication date |
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ES2705448T3 (es) | 2019-03-25 |
RU2008138598A (ru) | 2010-04-10 |
CA2635855A1 (en) | 2007-09-07 |
CA2635855C (en) | 2014-05-20 |
EP1990169A1 (en) | 2008-11-12 |
US20090068428A1 (en) | 2009-03-12 |
JPWO2007099825A1 (ja) | 2009-07-16 |
EP1990169B1 (en) | 2018-07-04 |
EP1990169A4 (en) | 2013-01-23 |
JP5309561B2 (ja) | 2013-10-09 |
CN101389457A (zh) | 2009-03-18 |
RU2419540C2 (ru) | 2011-05-27 |
BRPI0708377A2 (pt) | 2011-06-07 |
US8236410B2 (en) | 2012-08-07 |
CN101389457B (zh) | 2014-07-02 |
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