WO2020246440A1 - Corps moulé en résine renforcée par des fibres - Google Patents

Corps moulé en résine renforcée par des fibres Download PDF

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Publication number
WO2020246440A1
WO2020246440A1 PCT/JP2020/021663 JP2020021663W WO2020246440A1 WO 2020246440 A1 WO2020246440 A1 WO 2020246440A1 JP 2020021663 W JP2020021663 W JP 2020021663W WO 2020246440 A1 WO2020246440 A1 WO 2020246440A1
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Prior art keywords
resin
fiber
integrated
fiber sheet
molded product
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PCT/JP2020/021663
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English (en)
Japanese (ja)
Inventor
田中忠玄
平石陽一
中村崇
中明裕太
駒井優貴
Original Assignee
倉敷紡績株式会社
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Priority to JP2021524839A priority Critical patent/JPWO2020246440A1/ja
Publication of WO2020246440A1 publication Critical patent/WO2020246440A1/fr

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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
    • B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
    • B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
    • B29B15/10—Coating or impregnating independently of the moulding or shaping step
    • B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
    • 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
    • B29C70/08—Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, and with or without non-reinforced layers
    • 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
    • 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
    • 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

Definitions

  • the present invention relates to a fiber-reinforced resin molded body composed of a laminated body in which resin-integrated fiber sheets of different resins are laminated.
  • Fiber reinforced composites made of fiber and matrix resin have excellent mechanical properties, such as building materials, laptop housings, IC trays, sports equipment such as shoes and sticks, windmills, automobiles, railroads, ships, aviation, and space. It is widely used in general industrial applications such as.
  • a fiber-reinforced composite material in which a reinforcing fiber base material sheet having good workability is impregnated with a resin is used in a wide range of applications as a material having both light weight, strength, rigidity and the like.
  • the continuous fiber sheet has extremely high tensile strength as compared with the discontinuous fiber sheet, and is regarded as useful for members requiring strength such as structural members and outer panels of aviation, space, ships, automobiles, and buildings.
  • a fiber-reinforced composite material can be manufactured by laminating and molding a plurality of intermediate materials (prepregs, semipregs) composed of a resin and a fiber sheet as a matrix resin.
  • the fiber-reinforced composite material can be made by laminating a plurality of sheets using carbon fibers arranged in one direction as a reinforcing fiber base material in one direction, an orthogonal direction, or a different direction with respect to the fiber axis direction, and in each direction.
  • physical properties are controlled.
  • Fiber reinforced composites are required to have various properties other than improving strength and moldability.
  • Patent Documents 1 to 4 there is a proposal of laminating a resin or a film on the surface of a fiber-reinforced composite material.
  • the present invention provides a fiber-reinforced resin molded product in which at least one surface layer is provided with functionality, the other layer has high strength, and the overall strength is practically sufficient. provide.
  • the fiber-reinforced resin molded body of the present invention is a fiber-reinforced resin molded body in which a plurality of resin-integrated fiber sheets composed of a continuous fiber sheet and a thermoplastic resin are laminated, and the fiber-reinforced resin molded body is 2 It is characterized in that more than one type of resin-integrated fiber sheet is laminated and integrated, including a surface layer and an inner layer, and the resin-integrated fiber sheet of at least one surface layer is different from the other resin-integrated fiber sheets. To do.
  • a plurality of resin-integrated fiber sheets composed of a continuous fiber sheet and a thermoplastic resin are laminated, and include a surface layer and an inner layer, and the resin-integrated fiber sheet of at least one surface layer and the other resin are integrated.
  • the synthetic fiber sheet at least one surface layer is imparted with functionality, the other layer has high strength, and it is possible to provide a fiber-reinforced resin molded body having practically sufficient strength as a whole. Further, it can be a fiber-reinforced resin molded product that is thin and has strength that can withstand practical use.
  • the matrix resin is a thermoplastic resin, the molding cycle is fast, the shapeability is good, and efficient integral molding is possible.
  • FIG. 1 is a schematic perspective view of a resin-integrated carbon fiber sheet according to an embodiment of the present invention.
  • FIG. 2 is a schematic cross-sectional view of the resin-integrated carbon fiber sheet in the width direction.
  • FIG. 3 is a schematic process diagram showing a method for producing a resin-integrated carbon fiber sheet according to an embodiment of the present invention.
  • FIG. 4A is a schematic perspective view of two types of resin integrated fiber sheets used in one embodiment of the present invention, and FIG. 4B is a schematic explanatory view of laminating the resin integrated fiber sheets.
  • FIG. 5 is a stress-displacement measurement graph of Example 1 of the present invention.
  • FIG. 6 is a stress-displacement measurement graph of Comparative Example 1.
  • FIG. 7 is a stress-displacement measurement graph of Example 2 of the present invention.
  • FIG. 8 is a stress-displacement measurement graph of Comparative Example 2.
  • the present invention is a fiber-reinforced resin molded product in which a plurality of resin-integrated fiber sheets composed of a continuous fiber sheet and a thermoplastic resin are laminated.
  • this fiber-reinforced resin molded body two or more types of resin-integrated fiber sheets are laminated and integrated, and the resin-integrated fiber sheet of at least one surface layer is different from the other resin-integrated fiber sheets.
  • functionality such as adhesiveness can be imparted to at least one surface layer.
  • the resin-integrated fiber sheet of both surface layers is different from the resin-integrated fiber sheet of the inner layer.
  • the resin-integrated fiber sheets of both surface layers may be the same or different. As a result, functionality such as adhesiveness can be imparted to both surface layers, and the balance of strength can be improved.
  • the thickness of the fiber-reinforced resin molded product is preferably 0.1 to 5.0 mm, more preferably 0.25 to 3.0 mm. As a result, a thin and high-strength molded product can be obtained.
  • Reinforcing fibers are used as the fibers of the fiber-reinforced resin molded product.
  • Reinforcing fibers include carbon fibers, glass fibers, aramid fibers, and other thermoplastic fibers (polyethylene, polypropylene, etc.). However, carbon fiber is preferable because it is intended for thin materials.
  • the resins include polyamide-based resin, polycarbonate-based resin, polypropylene-based resin, polyester-based resin, polyethylene-based resin, acrylic-based resin, phenoxy resin, polystyrene-based resin, polyimide-based resin, polyetheretherketone (PEEK) -based resin, and It is preferably selected from polyetherketoneketone (PEKK) -based resins, and the resin of the resin-integrated fiber sheet of at least one surface layer and the resin of the other resin-integrated fiber sheet are preferably different.
  • PEKK polyetherketoneketone
  • the fiber-reinforced resin molded body As an example of the fiber-reinforced resin molded body, two resin-integrated fiber sheets (one on each of the front and back surfaces) made of polyamide (PA) 12 resin and carbon fiber on both surface layers, and phenoxy resin and carbon fiber on the inner layer. Twelve resin-integrated fiber sheets are arranged and laminated and integrated.
  • the PA12 resin has good adhesiveness to rubber and metal, so that it is convenient to integrate with rubber or metal, and rubber can be attached. It is well known in JP-A-2015-145129 and JP-A-2005-111902 that the adhesiveness between PA12 and rubber is good, and that the adhesiveness between PA12 and metal is good is published in JP-A-2004-346255. It is well known in Japanese Patent Application Laid-Open No.
  • unidirectional continuous fibers in which continuous fiber groups are opened and arranged in parallel in one direction and crosslinked fibers in a direction intersecting with the unidirectional continuous fibers are present, and the crosslinked fibers are made of a thermoplastic resin. It is preferably bonded and fixed to the continuous fiber sheet. As a result, the strength in the width direction is high, the cleavage property is low, and the handleability is good even if the thickness is thin.
  • the crosslinked fibers are preferably those generated from the continuous fiber group when the continuous fiber group is opened to form unidirectional continuous fibers arranged in parallel in one direction.
  • the crosslinked fibers generated from the continuous fiber group in a series of steps are interlaced or entangled with the continuous fiber sheet, and have low cleavability.
  • the continuous fiber sheet may be a woven fabric.
  • the crosslinked fibers are preferably 1 to 25% by mass, more preferably 3 to 20% by mass, and further preferably 5 to 15% by mass. ..
  • the crosslinked fibers are present in the above proportions, the strength of the continuous fiber sheet in the width direction is high, the fissure is low, and the handleability can be further improved.
  • the continuous fiber sheet is preferably a semi-preg in which resin powder is adhered to the surface and melted.
  • This semi-preg can be manufactured by a dry method, and the manufacturing efficiency is high.
  • the continuous fiber sheet may be a prepreg impregnated with a resin.
  • the fiber is preferably 30 to 70% by volume and the resin is 70 to 30% by volume, more preferably 35 to 65% by volume of the fiber and 65 to 35% by volume of the resin. is there.
  • the resin component of the resin-integrated fiber sheet can be directly used as the matrix resin component of the molded product. That is, it is possible to eliminate the need to add a new resin when manufacturing the molded product.
  • the mass of the resin-integrated fiber sheet is preferably 10 to 3000 g / m 2 , more preferably 20 to 2000 g / m 2 , and even more preferably 30 to 1000 g / m 2 .
  • the resin adhered state of the resin-integrated fiber sheet of the present invention is that the resin is melt-solidified and adhered near the surface of the opened fiber sheet, and the resin is not impregnated inside the fiber sheet. It is preferably partially impregnated. In the above state, it is preferable to heat and pressurize a plurality of resin-integrated fiber sheets in a laminated state to form a fiber-reinforced resin molded product.
  • the width of the spread fiber sheet (hereinafter, also referred to as “spread fiber sheet”) is preferably 0.1 to 5.0 mm per 1000 constituent fibers. Specifically, the width of the spread fiber sheet is about 0.1 to 1.5 mm per 1000 constituent fibers in the case of a large tow such as 50K or 60K, and the constituent fibers in the case of a regular tow such as 12K or 15K. It is about 0.5 to 5.0 mm per 1000 pieces. As the number of constituent fibers of the tow per fiber increases, the twist of the fibers increases and it becomes difficult to open the fibers, so that the width of the opening sheet also becomes narrower.
  • the unopened fiber tow sold by the carbon fiber manufacturer can be expanded to form an easy-to-use spread fiber sheet, which can be supplied to various molded products.
  • the carbon fiber bundle (toe) of the feed yarn is preferably 5,000 to 50,000 / bundle, and 10 to 280 carbon fiber bundles (tow) are preferably supplied.
  • a plurality of carbon fiber bundles (tow) are supplied and opened in this way to form a single sheet, the space between the carbon fiber bundle (toe) and the carbon fiber bundle (toe) is easily cleaved, but in various directions.
  • the crosslinked fibers having properties are adhered and fixed to the sheet with a resin, cleavage between the toes can be prevented.
  • the average length of the crosslinked fibers is preferably 1 mm or more, more preferably 5 mm or more.
  • the carbon fiber sheet has high strength in the width direction and is excellent in handleability.
  • the method for producing a resin-integrated fiber sheet of the present invention includes the following steps.
  • a carbon fiber sheet will be described as a fiber sheet.
  • crosslinked fibers When the carbon fiber filament group is opened by passing through a roll or an opening bar, by applying tension to the carbon fiber filament group, crosslinked fibers can be generated from the carbon fiber filament group at the time of opening.
  • the tension of the carbon fiber filament group can be, for example, in the range of 2.5 to 30 N per 15,000 fibers.
  • air defibration it is preferable to generate crosslinked fibers by a roll or a defibration bar after this.
  • the crosslinked fibers are generated from the carbon fiber filament group, the crosslinked fibers are in a state of being interlaced with the carbon fibers constituting the carbon fiber sheet.
  • crossing includes entanglement.
  • some or all of the crosslinked fibers are present in the carbon fiber sheet and are sterically interlaced with the carbon fibers arranged in one direction.
  • B Powder resin is applied to the opened carbon fiber sheet.
  • C The powder resin is heated and melted in a pressure-free (no pressure) state, cooled, and the resin is partially present on at least a part of the surface of the carbon fiber sheet. At this time, the crosslinked fibers are adhered and fixed to the carbon fiber sheet with the resin on the surface.
  • FIG. 1 is a schematic perspective view of the resin-integrated carbon fiber sheet 1 according to the embodiment of the present invention
  • FIG. 2 is a schematic cross-sectional view of the resin-integrated carbon fiber sheet 1 in the width direction.
  • Crosslinked fibers 3 are arranged in various directions on the surface of the opened carbon fiber sheet 2.
  • the resin 4 is melt-solidified and adhered to the vicinity of the surface of the carbon fiber sheet 2, and the resin 4 is not or partially impregnated inside the carbon fiber sheet 2.
  • the resin 4 adheres and fixes the crosslinked fiber 3 to the surface of the carbon fiber sheet 2.
  • crosslinked fibers 3a and 3b are present on the surface of the carbon fiber sheet 2.
  • the crosslinked fibers 3a are all on the surface of the carbon fiber sheet 2.
  • a part of the crosslinked fiber 3b is on the surface of the carbon fiber sheet 2, and a part of the crosslinked fiber 3b is in a state of entering the inside and interlacing with the carbon fiber.
  • the resin 4 adheres and fixes the crosslinked fiber 3 to the surface of the carbon fiber sheet 2. Further, there is a portion to which the resin 4 is attached and a portion 5 to which the resin is not attached.
  • the portion 5 to which the resin does not adhere is a passage through which the air inside the fiber sheet escapes when the resin-integrated carbon fiber sheet 1 is heated and pressed in a laminated state to form a fiber-reinforced resin molded product. Therefore, the resin on the surface is easily impregnated in the entire fiber sheet by pressurization. As a result, the resin 4 becomes a matrix resin of the fiber-reinforced resin molded product.
  • FIG. 3 is a schematic process diagram showing a method for producing a resin-integrated carbon fiber sheet according to an embodiment of the present invention.
  • the carbon fiber filament group (toe) 8 is pulled out from a large number of supply bobbins 7 and passed between the opening rolls 21a-21j to open the fibers (roll opening step 23). Instead of roll opening, air opening may be used.
  • the spread fiber roll may be fixed or rotated, or may vibrate in the width direction.
  • the opened tow is nipated between the nip rolls 9a and 9b, passed between a plurality of bridge rolls 12a-12b installed between the nip rolls 9a and 9b, and the tension of the toe is applied per 15,000, for example (1).
  • Cross-linked fibers are generated by applying in the range of 2.5 to 30 N (corresponding to the carbon fiber filament group supplied from each supply bobbin) (cross-linked fiber generation step 24).
  • the bridge roll may rotate or oscillate in the width direction.
  • the bridge roll has a satin finish, an uneven surface, a mirror surface, and a plurality of rolls, and the carbon fiber filament group is bent, fixed, rotated, vibrated, or a combination thereof to generate crosslinked fibers.
  • 13a-13g is a guide roll. After that, the dry powder resin 15 is sprinkled on the surface of the spread sheet from the powder supply hopper 14, supplied into the heating device 16 in a pressure-free state and heated to melt the dry powder resin 15, and between the guide rolls 13f-13g. Cooling.
  • the dry powder resin 18 is sprinkled on the back surface of the spread fiber sheet from the powder supply hopper 17, and the dry powder resin 18 is supplied into the heating device 19 in a pressure-free state and heated to melt the dry powder resin 18, cool it, and wind up the roll 20.
  • the dry powder resins 15 and 18 are, for example, phenoxy resins (glass transition point 180 ° C.), the temperatures in the heating devices 16 and 19 are, for example, + 20 to 60 ° C. of the melting point or glass transition point of the resin, and the residence time is, for example, 4 each. Let it be seconds.
  • the carbon fiber spread sheet has high strength in the width direction, and the constituent carbon fibers do not fall apart and can be handled as a sheet.
  • Powder resin can be applied by powder coating method, electrostatic coating method, spraying method, fluid immersion method, etc.
  • a powder coating method in which the powder resin is dropped on the surface of the carbon fiber sheet is preferable.
  • a dry powder-like powder resin is sprinkled on the opened carbon fiber sheet.
  • FIG. 4A is a schematic perspective view of two types of resin integrated fiber sheets used in one embodiment of the present invention
  • FIG. 4B is a schematic explanatory view of laminating the resin integrated fiber sheets.
  • the resin integrated fiber sheet 30 is composed of carbon fibers 32 and resin 33 arranged in one direction, and is arranged on both surface layers.
  • the resin-integrated fiber sheet 31 is composed of carbon fibers 32 and resin 34 arranged in one direction, and is arranged in the inner layer.
  • the crosslinked fibers shown in FIGS. 1 and 2 are present in the resin-integrated fiber sheets 30 and 31, but are omitted in the drawing. As shown in FIG.
  • a plurality of resin-integrated fiber sheets 31 are used as inner layers, resin-integrated fiber sheets 30 are arranged on both surfaces thereof, and the whole is pressurized and heated to be laminated and integrated to form a fiber-reinforced resin molded product.
  • the pressing force for laminating and integrating is preferably 0.2 to 10 MPa, the temperature is preferably + 20 to 60 ° C. of the melting point or flow start temperature of the resin, and the time is preferably 2 to 15 minutes.
  • a preferred example of the present invention can be summarized as follows.
  • the fiber-reinforced resin molded product has a laminated structure of two or more layers.
  • the directionality of the fibers does not matter, but a unidirectional sheet is preferable in consideration of thinness. It is preferable to laminate a sheet with added functionality on at least one surface layer side. Considering warpage after molding, a layer having the same front and back surfaces is preferable. That is, the fiber-reinforced resin molded body is a front surface layer (1 to 2 layers) / inner layer (N layer) / back surface layer (1 to 2 layers), and the number N of inner layers is preferably 1 to 100, and the total number of layers is 3 to 102 is preferable.
  • a molding method a general compression molding method such as press molding or vacuum forming is used. As a result, it is integrally molded. It is meaningless to have the surface layer and the inner layer as separate processes.
  • Others It is preferable to impart functionality to at least one surface layer.
  • the functionality includes adhesiveness, printability, weather resistance, water resistance, chemical resistance, paintability, processability, functionality, thermal conductivity, flame retardancy, surface smoothness and the like. It is also possible to change the fiber volume fraction (Vf) of the resin-integrated fiber sheet to be laminated.
  • Vf fiber volume fraction
  • imparting adhesiveness to the surface layer of the fiber-reinforced resin molded product is useful for integrating with at least one selected from metal, resin and rubber.
  • Example 1 Carbon fiber unopened fiber tow The carbon fiber unopened fiber tow was manufactured by Mitsubishi Chemical Corporation, product number: PYROFILE TR 50S15L, shape: regular tow filament 15K (15,000 fibers,), and a single fiber diameter of 7 ⁇ m was used. An epoxy compound is attached to the carbon fiber of the unopened carbon fiber tow as a sizing agent.
  • Means for opening the unopened fiber tow The fibers were opened using the opening means shown in FIG. In the fiber opening step, the tension of the carbon fiber filament group (toe) was set to 15 N per 15,000 fibers.
  • Mass 132.4g / m 2 (resin: 52.4g / m 2, the fibers: 80g / m 2) was.
  • (3-2) Semi-preg 2 PA12 resin (manufactured by Daicel Evonik, melting point 176 ° C.) was used as the dry powder resin.
  • the average particle size of the dry powder resin was 80 ⁇ m.
  • An average of 24.0 g of this resin was applied to 1 m 2 of carbon fibers on one side and 48.0 g on both sides.
  • the temperature in the heating devices 16 and 19 was 200 ° C., and the residence time was 4 seconds each.
  • the mass was 128.0 g / m 2 (resin: 48 g / m 2 , fiber: 80 g / m 2 ).
  • Example 1 The same experiment as in Example 1 was carried out except that the semi-preg 2 of Example 1 was used for all layers as the resin-integrated fiber sheet (semi-preg).
  • Example 1 A sample was cut out from the molded products of Example 1 and Comparative Example 1 to a length of 80 mm (designated direction) and a width of 15 mm, and allowed to stand at a temperature of 23 ° C. and a relative humidity of 50% for 48 hours or more. Six samples were taken for each of 1 product of Example and 1 product of Comparative Example. The sizes of the obtained samples are summarized in Table 1.
  • FIG. 5 is a stress-displacement measurement graph of Example 1 of the present invention
  • FIG. 6 is a stress-displacement measurement graph of Comparative Example 1.
  • the numerical values in FIGS. 5 to 6 indicate the measurement order.
  • Example 2 since the matrix resin of both surface layers of Example 1 is PA12 resin, it is imparted with the functionality of having high adhesive strength to rubber and metal, and is practically sufficient as a whole. It had strength.
  • Example 2 Carbon fiber unopened fiber tow
  • the carbon fiber unopened fiber tow was manufactured by Mitsubishi Chemical Corporation, product number: PYROFILE TR 50S15L, shape: regular tow filament 15K (15,000 fibers,), and a single fiber diameter of 7 ⁇ m was used.
  • An epoxy compound is attached to the carbon fibers of the unopened carbon fiber tow as a sizing agent.
  • Means for opening the unopened fiber tow The fibers were opened using the opening means shown in FIG. In the fiber opening step, the tension of the carbon fiber filament group (toe) was set to 15 N per 15,000 fibers. In this way, an spread sheet having a carbon fiber filament composition of 50 K, a spread width of 500 mm, and a thickness of 0.08 mm was obtained.
  • the crosslinked fiber was 3.3% by mass.
  • the basis weight was 80 g / m 2 .
  • (3-1) Semi-preg 3 A polycarbonate resin (manufactured by Teijin Limited, melting point 240 ° C. or less) was used as the dry powder resin.
  • the average particle size of the dry powder resin was 180 ⁇ m or less.
  • An average of 26.4 g of this resin was applied to 1 m 2 of carbon fibers on one side and 53 g on both sides.
  • the temperatures in the heating devices 16 and 19 were 260 ° C., and the residence time was 4 seconds each.
  • the mass was 133 g / m 2 (resin: 53 g / m 2 , fiber: 80 g / m 2 ).
  • One semi-preg 4 is installed on the front and back surfaces, 10 semi-pregs 3 are arranged in the inner layer, the base fiber direction is one direction, the base size is 250 mm in length and 250 mm in width, and the press Molding was performed at 300 ° C. and 3 MPa for 5 minutes.
  • Example 2 The same experiment as in Example 2 was carried out except that the semi-preg 3 of Example 2 was used for all layers as the resin-integrated fiber sheet (semi-preg).
  • Example 2 A sample was cut out from the molded products of Example 2 and Comparative Example 2 to a length of 80 mm (designated direction) and a width of 15 mm, and allowed to stand at a temperature of 23 ° C. and a relative humidity of 50% for 48 hours or more. Six samples were taken for each of the two Examples and the two Comparative Examples. The sizes of the obtained samples are summarized in Table 3.
  • FIG. 7 is a stress-displacement measurement graph of Example 2 of the present invention
  • FIG. 8 is a stress-displacement measurement graph of Comparative Example 2.
  • the numerical values in FIGS. 7 to 8 indicate the measurement order.
  • Example 2 since the matrix resin of both surface layers of Example 2 is a phenoxy resin, it is possible to impart a function having excellent moisture resistance, and further, the flexural modulus and bending from Example 2 and Comparative Example 2 The strength was the same, and it had a practically sufficient strength.
  • the fiber-reinforced resin molded product of the present invention is widely applied to building materials, laptop housings, IC trays, sporting goods such as shoes and sticks, and general industrial applications such as windmills, automobiles, railways, ships, aerospace, and the like. it can.

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  • Mechanical Engineering (AREA)
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Abstract

La présente invention concerne une pluralité de feuilles de fibres intégrées à une résine (30, 31) comprenant chacune une feuille de fibres continues et une résine thermoplastique qui sont empilées les unes sur les autres, au moins deux types des feuilles de fibres intégrées à une résine étant empilés et intégrés, comprenant une couche de surface et une couche interne, et une feuille de fibres intégrées à une résine (30) dans au moins une couche de surface et une autre feuille de fibres intégrées à une résine (31) diffèrent l'une de l'autre. Des fibres continues unidirectionnelles dans lesquelles des groupes de fibres continues sont ouverts et sont agencés en parallèle dans une direction, et des fibres de réticulation dans une direction entrelacées avec les fibres continues unidirectionnelles existent dans chaque feuille de fibres continues, et les fibres de réticulation sont de préférence fixées de manière adhésive aux feuilles de fibres continues au moyen d'une résine thermoplastique. De cette manière, une fonctionnalité est conférée à au moins une couche de surface, et les autres couches ont une résistance élevée, ce qui permet d'obtenir un corps moulé en résine renforcée par des fibres qui présente également globalement une résistance adéquate pour une utilisation pratique.
PCT/JP2020/021663 2019-06-07 2020-06-01 Corps moulé en résine renforcée par des fibres WO2020246440A1 (fr)

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JP2019-107406 2019-06-07
JP2019107406 2019-06-07

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Cited By (1)

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EP4059684A4 (fr) * 2019-11-13 2023-12-06 Kurashiki Boseki Kabushiki Kaisha Feuille de fibres intégrée à une résine pour une formation sous vide, et corps formé et procédé de production de corps formé utilisant cette dernière

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JPH01154736A (ja) * 1987-12-11 1989-06-16 Kuraray Co Ltd 強度の改良されたスタンピング成形材料
JPH071625A (ja) * 1993-06-16 1995-01-06 Asics Corp ハイブリッドｆｒｐ積層体
JP2016011367A (ja) * 2014-06-30 2016-01-21 三菱レイヨン株式会社 積層基材
JP2016196142A (ja) * 2015-04-06 2016-11-24 三菱レイヨン株式会社 成形体およびその製造方法
WO2017122740A1 (fr) * 2016-01-13 2017-07-20 旭硝子株式会社 Préimprégné, son procédé de production et article moulé renforcé par des fibres

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Publication number Priority date Publication date Assignee Title
JPH01154736A (ja) * 1987-12-11 1989-06-16 Kuraray Co Ltd 強度の改良されたスタンピング成形材料
JPH071625A (ja) * 1993-06-16 1995-01-06 Asics Corp ハイブリッドｆｒｐ積層体
JP2016011367A (ja) * 2014-06-30 2016-01-21 三菱レイヨン株式会社 積層基材
JP2016196142A (ja) * 2015-04-06 2016-11-24 三菱レイヨン株式会社 成形体およびその製造方法
WO2017122740A1 (fr) * 2016-01-13 2017-07-20 旭硝子株式会社 Préimprégné, son procédé de production et article moulé renforcé par des fibres

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4059684A4 (fr) * 2019-11-13 2023-12-06 Kurashiki Boseki Kabushiki Kaisha Feuille de fibres intégrée à une résine pour une formation sous vide, et corps formé et procédé de production de corps formé utilisant cette dernière

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