WO2024004748A1 - 繊維強化樹脂成形材料および成形品 - Google Patents
繊維強化樹脂成形材料および成形品 Download PDFInfo
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- WO2024004748A1 WO2024004748A1 PCT/JP2023/022694 JP2023022694W WO2024004748A1 WO 2024004748 A1 WO2024004748 A1 WO 2024004748A1 JP 2023022694 W JP2023022694 W JP 2023022694W WO 2024004748 A1 WO2024004748 A1 WO 2024004748A1
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- fiber
- reinforcing fibers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
- D02G3/16—Yarns or threads made from mineral substances
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/36—Cored or coated yarns or threads
Definitions
- the present invention relates to a molding material containing reinforcing fibers and a thermoplastic resin, and a molded article containing reinforcing fibers and a thermoplastic resin.
- molding materials containing continuous reinforcing fibers and thermoplastic resin as a matrix such as thermoplastic prepreg, yarn, and glass mat (GMT).
- thermoplastic prepreg, yarn, and glass mat GMT
- These molding materials take advantage of the properties of thermoplastic resins and are easy to mold, do not require storage loads like thermosetting resins, and the resulting molded products have high toughness.
- molding materials processed into pellets can be applied to molding methods with excellent economic efficiency and productivity, such as injection molding and stamping molding, and are useful as industrial materials.
- Patent Document 1 discloses that mechanical properties and fluidity are improved by injection molding a molding material that combines a molding material made of reinforcing fibers and a thermoplastic resin and a fiber-reinforced thermoplastic resin molding material obtained by crushing an injection molded product. It is disclosed that a molded article with excellent properties can be obtained. Furthermore, Patent Documents 2 and 3 disclose that a molded product with excellent mechanical properties and appearance quality can be obtained by injection molding a thermoplastic resin and combining two types of reinforcing fibers, one with a long fiber length and the other with a short fiber length. This is disclosed.
- thermoplastic resin molding materials containing reinforcing fibers have had a problem of poor fluidity due to the long reinforcing fibers.
- the reinforcing fibers are short, they have excellent fluidity, but if the reinforcing fibers break during injection molding, there is a problem that the mechanical properties and dimensional accuracy of the molded product deteriorate, and it is difficult to achieve both. Ta. Therefore, in applications requiring small, thin, and complex molded products, it is necessary to contain long reinforcing fibers with excellent mechanical properties and to have excellent fluidity.
- an object of the present invention is to provide a fiber-reinforced resin molding material and a fiber-reinforced resin molded product that can achieve both excellent fluidity, mechanical properties, and dimensional accuracy.
- the present invention has the following configuration.
- the fiber-reinforced resin molding material contains 1 to 30 parts by weight of reinforcing fiber (A) and 70 to 99 parts by weight of thermoplastic resin (B) based on 100 parts by weight of (A) and (B) in total.
- the reinforcing fibers (A) include reinforcing fibers (A-1) and bundled reinforcing fibers (A-2),
- the reinforcing fibers (A-1) have a length of 3 to 15 mm and are aligned in the longitudinal direction of the molding material, and the length of the reinforcing fibers (A-1) is the same as the length of the molding material in the longitudinal direction.
- the bundled reinforcing fiber (A-2) is a fiber-reinforced resin molding material composed of 10 or more single yarns with a length of 0.5 to 2.9 mm.
- the fiber-reinforced resin molding material includes a fiber-reinforced resin molding material (X) and a fiber-reinforced resin molding material (Y),
- the fiber-reinforced resin molding material (X) contains reinforcing fibers (A-1) and thermoplastic resin (B-1),
- the reinforcing fibers (A-1) are aligned in the longitudinal direction of the fiber reinforced resin molding material (X),
- the fiber-reinforced resin molding material (Y) according to (1), wherein the fiber-reinforced resin molding material (Y) contains bundled reinforcing fibers (A-2) and a thermoplastic resin (B-2).
- the fiber-reinforced resin molding material has a core-sheath structure;
- the core structure of the core-sheath structure includes reinforcing fibers (A-1), and the reinforcing fibers (A-1) are aligned in the longitudinal direction of the molding material,
- the sheath structure of the core-sheath structure is a fiber reinforced resin composition (C) containing bundled reinforcing fibers (A-2) and a thermoplastic resin (B), The fiber reinforced resin molding material according to (1) or (2), wherein the sheath structure covers the core structure.
- the content of the reinforcing fibers (A-1) and bundled reinforcing fibers (A-2) is 50 to 99 parts by weight of the reinforcing fibers (A-1) relative to 100 parts by weight of the reinforcing fibers (A).
- the fiber reinforced resin molding material according to any one of (1) to (4) which contains 1 to 50 parts by weight of bundled reinforcing fibers (A-2).
- thermoplastic resin (B) contains at least one selected from polyamide resin, polycarbonate resin, polyphenylene sulfide resin, and polypropylene resin.
- the fiber-reinforced resin molded article contains 1 to 30 parts by weight of reinforcing fiber (A') and 70 to 99 parts by weight of thermoplastic resin (B), based on a total of 100 parts by weight of (A') and (B).
- the weight average fiber length Lw (A') of the reinforcing fiber (A') is 0.1 to 2.9 mmmm
- thermoplastic resin (B) contains at least one selected from polyamide resin, polycarbonate resin, polyphenylene sulfide resin, and polypropylene resin.
- the molding material of the present invention has excellent fluidity during molding processing and can easily produce molded products with excellent mechanical properties and dimensional accuracy, so it can be used for injection molding, transfer molding, blow molding, insert molding, etc. It can be applied to a wide range of molding methods such as plunger molding, press molding, and stamping molding.
- Molded products obtained by molding the molding material of the present invention include thrust washers, oil filters, seals, bearings, gears, cylinder head covers, bearing retainers, intake manifolds, automobile parts such as pedals, silicon wafer carriers, and IC chip trays. , semiconductor and liquid crystal manufacturing equipment parts such as electrolytic capacitor trays and insulating films, industrial machinery parts such as compressor parts such as pumps, valves, and seals, and aircraft cabin interior parts, medical equipment parts such as sterilization instruments, columns, and piping, and food/ Examples include beverage manufacturing equipment parts. Further, by using the molding material of the present invention, it is possible to relatively easily obtain a molded article with a thickness of 0.5 to 2 mm.
- Examples of materials that require such thin-walled molding include components for electrical and electronic equipment, such as keyboard supports that support keyboards inside personal computers.
- components for electrical and electronic equipment such as keyboard supports that support keyboards inside personal computers.
- conductive carbon fiber it is preferable to use conductive carbon fiber as the reinforcing fiber because electromagnetic shielding properties are imparted to the reinforcing fiber.
- FIG. 1 is a schematic diagram showing an example of the shape of an axial cross section of a molding material according to an embodiment of the present invention. It is a schematic diagram showing an example of the shape of the axial direction cross section of the molding material concerning another embodiment of the present invention. It is a schematic diagram showing an example of the shape of the cross section perpendicular to the axis of the molding material concerning yet another embodiment of the present invention. It is a schematic diagram showing an example of the shape of the cross section perpendicular to the axis of the molding material concerning yet another embodiment of the present invention. It is a schematic diagram showing an example of the shape of the cross section perpendicular to the axis of the molding material concerning yet another embodiment of the present invention. It is a schematic diagram showing an example of the shape of the cross section perpendicular to the axis of the molding material concerning yet another embodiment of the present invention.
- the molding material of the present invention contains reinforcing fibers (A) and thermoplastic resin (B).
- reinforcing fibers (A) the fiber length of the reinforcing fibers can be kept long and excellent mechanical properties can be exhibited.
- the reinforcing fiber (A) in the present invention will be explained.
- the type of reinforcing fiber (A) in the present invention is not particularly limited, and for example, carbon fiber, glass fiber, aramid fiber, alumina fiber, silicon carbide fiber, boron fiber, metal fiber, natural fiber, mineral fiber, etc. are used. These may be used alone or in combination of two or more.
- carbon fibers such as PAN (polyacrylonitrile), pitch, and rayon are preferably used from the viewpoint of obtaining molded products that are lightweight, have high strength, and have a high modulus of elasticity.
- reinforcing fibers with a tensile strength of 4000 MPa or more are preferred, and more preferably 5000 MPa or more.
- reinforcing fibers with a tensile modulus of 200 GPa or more are preferable, and more preferably 400 GPa or more.
- reinforcing fibers with an elastic modulus of 400 GPa or more which is difficult to maintain long fiber lengths, are preferable because they can more effectively exhibit the effects of the molding material of the present invention, which will be described later.
- glass fiber can be preferably used, and in particular, it is preferable to use carbon fiber and glass fiber in combination from the viewpoint of a balance between mechanical properties and economic efficiency.
- aramid fibers can be preferably used from the viewpoint of improving the shock absorption properties and formability of the resulting molded product, and in particular, it is preferable to use carbon fibers and aramid fibers in combination from the viewpoint of the balance between mechanical properties and shock absorption properties.
- reinforcing fibers coated with metals such as nickel, copper, and ytterbium, and pitch-based carbon fibers can also be used.
- a sizing agent is attached to the reinforcing fiber (A).
- a sizing agent is attached to the reinforcing fibers (A).
- a sizing agent such as epoxy resin, urethane resin, acrylic resin, and various thermoplastic resins can be used in combination.
- the amount of reinforcing fiber (A) is 1 to 30 parts by weight based on 100 parts by weight of the molding material. More preferably, it is 2 to 25 parts by weight, and even more preferably 5 to 20 parts by weight. If the reinforcing fiber (A) is less than 1 part by weight, the resulting molded product may have insufficient mechanical properties and dimensional accuracy, and if it exceeds 30 parts by weight, fluidity may decrease.
- the reinforcing fibers (A) in the present invention include reinforcing fibers (A-1) and bundled reinforcing fibers (A-2).
- the length of the reinforcing fiber (A-1) is preferably 3 to 15 mm, more preferably 5 to 10 mm. It is preferable that the reinforcing fibers (A-1) have single fibers arranged in one direction.
- Preferred forms include unidirectional fiber bundles, bidirectional fiber bundles, and multidirectional fiber bundles, but unidirectional fiber bundles are more preferably used from the viewpoint of productivity in the process of manufacturing the molding material. can.
- the number of single fibers in one pellet is preferably 10,000 or more.
- the reinforcing fibers (A-1) are arranged in the longitudinal direction of the molding material, and the length of the reinforcing fibers (A-1) is equal to the length of the molding material. Preferably, they are substantially the same.
- being aligned in the longitudinal direction of the molding material refers to a state in which the long axis of the reinforcing fiber (A-1) and the long axis of the molding material are oriented in the same direction
- the angular deviation between the axes is preferably 20° or less, more preferably 10° or less, and still more preferably 5° or less.
- substantially the same length means, for example, in a pellet-shaped molding material, the reinforcing fibers (A-1) are cut midway inside the pellet, or the reinforcing fibers (A-1) are significantly shorter than the entire length of the pellet. is not substantially included. Note that the total length of the pellet is the length in the orientation direction of the reinforcing fibers (A-1) in the pellet. Since the reinforcing fibers (A-1) have substantially the same length as the molding material, the length of the reinforcing fibers in the molded article can be increased, and excellent mechanical properties and dimensional accuracy can be obtained.
- the length of the reinforcing fiber bundle (A-2) is preferably 0.5 to 2.9 mm, more preferably 0.6 to 2.7 mm, and even more preferably 0.7 to 2.5 mm. If the length of the bundled reinforcing fibers (A-2) is less than 0.5 mm, it is not preferable because the mechanical properties and dimensional accuracy of the molded product are poor. On the other hand, if the length of the bundled reinforcing fibers (A-2) is longer than 2.9 mm, it is not preferable because fluidity is poor. Further, the reinforcing fiber bundle (A-2) is composed of ten or more single reinforcing fibers.
- the number of single reinforcing fibers constituting the bundle of reinforcing fibers (A-2) is preferably 10 or more, more preferably 15 or more, and even more preferably 20 or more. If the number of single yarns in the bundled reinforcing fibers (A-2) is less than 10, fiber breakage occurs during injection molding, resulting in poor mechanical properties and dimensional accuracy of the molded product, which is not preferable.
- the upper limit of the number of single yarns is not particularly defined, but is preferably 100,000 or less, more preferably 80,000 or less. If the number of single yarns exceeds 100,000, the appearance quality of the surface of the molded product will be poor, which is not preferable.
- the form of the bundled reinforcing fibers (A-2) used during melt-kneading is not limited as long as it can be added to the melt-kneading device, and examples include pre-cut chopped strands, crushed fibers, continuous long fibers, etc.
- Chopped strands can be preferably used from the viewpoint of productivity.
- the chopped strand may be a recycled chopped strand obtained by pulverizing a fiber-reinforced resin molding and thermally decomposing the matrix resin.
- the recycled chopped strands can be obtained by a known manufacturing method.
- waste pieces obtained by crushing and classifying fiber-reinforced resin moldings are spread uniformly on a metal vat, placed in an electric muffle furnace, and the processing temperature is maintained at a predetermined temperature while introducing nitrogen gas into the furnace. Heat treatment is performed. Thereafter, recycled chopped strands can be obtained by performing heat treatment in the same manner while introducing air into the furnace while maintaining the treatment temperature at a predetermined temperature.
- the heat treatment temperature in an air atmosphere in the heat treatment step is preferably 300°C to 700°C.
- the resin component (D) described below completely disappears, leaving only reinforcing fibers, and the convergence of the reinforcing fiber bundle (bundled reinforcing fibers (A-2)) decreases. This is undesirable because fiber breakage increases and mechanical properties and dimensional accuracy deteriorate because the reinforcing fibers cannot remain as bundled reinforcing fibers.
- the heat treatment temperature is less than 300° C., the amount of resin component (D) will increase, resulting in a decrease in toughness as a matrix resin, which is not preferable, since the mechanical properties will be poor.
- the resin component (D) becomes 7 parts by weight or more.
- the resin component (D) does not change even after heat treatment for more than 2 hours.
- a crushed fiber-reinforced resin molded product can be used, but when crushed, it is preferable to crush it to a maximum length of 20 mm or less in consideration of subsequent processability.
- a crusher for such a fiber-reinforced resin molded product a shear type crusher, an impact type crusher, a cutting type crusher, and a compression type crusher can be used. There is no problem in using any crusher, and it is possible to combine them.
- a classifier for crushed products a vibrating sieve, a gyro sieve, and a centrifugal sieve can be used. It is preferable to use it in accordance with the crushing capacity of the crusher and the form of the crushed material.
- the types of reinforcing fibers (A-1) and bundled reinforcing fibers (A-2) used in the present invention are not particularly limited, but any filler having a fibrous shape can be used. . Specifically, glass fibers, PAN-based and pitch-based carbon fibers, stainless steel fibers, metal fibers such as aluminum fibers and brass fibers, organic fibers such as aromatic polyamide fibers, gypsum fibers, ceramic fibers, asbestos fibers, and zirconia fibers.
- alumina fibers silica fibers, titanium oxide fibers, silicon carbide fibers, rock wool, potassium titanate whiskers, silicon nitride whiskers, wollastenite, alumina silicate, and other fibrous and whisker-like fillers, metals (nickel, copper, cobalt, Examples include non-metallic fibers (glass fibers, aramid fibers, polyester fibers, carbon fibers, etc.) coated with silver, aluminum, iron, alloys thereof, etc.
- PAN-based and pitch-based carbon fibers are preferred, and a particularly preferred example is PAN-based carbon fiber.
- the content of the reinforcing fibers (A-1) and bundled reinforcing fibers (A-2) of the present invention is 50 to 99 parts by weight based on 100 parts by weight of the reinforcing fibers (A). , preferably contains 1 to 50 parts by weight of bundled reinforcing fibers (A-2). If the content of the reinforcing fiber (A-1) is less than 50 parts by weight, the mechanical properties and dimensional stability of the molded article will be poor, which is not preferable. Furthermore, if the content of reinforcing fiber (A-1) exceeds 99 parts by weight, fluidity during injection molding will be poor, which is not preferable.
- the content of the reinforcing fiber (A-1) is more preferably 60 to 95 parts by weight, and even more preferably 70 to 90 parts by weight. If the content of the bundled reinforcing fibers (A-2) is less than 1 part by weight, the mechanical properties and dimensional accuracy of the molded article will be poor, which is not preferable. If the content of the bundled reinforcing fibers (A-2) exceeds 50 parts by weight, the mechanical properties will deteriorate, which is not preferable.
- the molding material of the present invention contains 70 to 99 parts by weight of the thermoplastic resin (B) based on the total of 100 parts by weight of the reinforcing fibers (A) and the thermoplastic resin (B).
- the thermoplastic resin (B) preferably has a molding temperature (melting temperature) of 200 to 450°C, and includes polyolefin resins, polystyrene resins, polyamide resins, halogenated vinyl resins, polyacetal resins, saturated polyester resins, and polycarbonate resins.
- an electrical insulator Two or more types of these can also be used.
- thermoplastic resins (B) polyolefin resins, polyamide resins, polycarbonate resins, and polyarylene sulfide resins are more preferable because they are lightweight and have an excellent balance of mechanical properties and moldability.
- the polyolefin resin mentioned here includes both unmodified and modified polyolefin resins.
- the unmodified polypropylene resin is specifically a propylene homopolymer or a copolymer of propylene and at least one ⁇ -olefin, conjugated diene, non-conjugated diene, or the like.
- Examples of the ⁇ -olefin include ethylene, 1-butene, 3-methyl-1-butene, 4-methyl-1-pentene, 3-methyl-1-pentene, 4-methyl-1-hexene, 4,4 dimethyl
- Examples include ⁇ -olefins having 2 to 12 carbon atoms other than propylene such as -1-hexene, 1-nonene, 1-octene, 1-heptene, 1-hexene, 1-decene, 1-undecene, and 1-dodecene.
- Examples of the conjugated diene and non-conjugated diene include butadiene, ethylidene norbornene, dicyclopentadiene, and 1,5-hexadiene.
- the skeleton structure of the unmodified polypropylene resin is a propylene homopolymer, a random or block copolymer of propylene and the other monomers mentioned above, or a random or block copolymer of propylene and other thermoplastic monomers. etc. can be mentioned. Suitable examples include polypropylene, ethylene/propylene copolymer, propylene/1-butene copolymer, and ethylene/propylene/1-butene copolymer.
- a homopolymer of propylene is preferable from the viewpoint of further improving the rigidity of the molded article, and a random or block copolymer of propylene and the above-mentioned other monomer is preferable from the viewpoint of further improving the impact strength of the molded article.
- an acid-modified polypropylene resin is preferable, and a polypropylene resin having a carboxylic acid and/or a salt group thereof bonded to a polymer chain is more preferable.
- the above-mentioned acid-modified polypropylene resin can be obtained by various methods, for example, monomers having neutralized or non-neutralized carboxylic acid groups and/or saponified polypropylene resins can be obtained by various methods. , can be obtained by graft polymerizing a monomer having an unsaponified carboxylic acid ester.
- monomers having a neutralized or unneutralized carboxylic acid group or monomers having a saponified or unsaponified carboxylic acid ester group include, for example, Examples include ethylenically unsaturated carboxylic acids, their anhydrides, and esterified products thereof. Furthermore, compounds having unsaturated vinyl groups other than olefins are also included.
- Examples of ethylenically unsaturated carboxylic acids include (meth)acrylic acid, maleic acid, fumaric acid, tetrahydrophthalic acid, itaconic acid, citraconic acid, crotonic acid, and isocrotonic acid, and examples of the anhydride include nadic acid TM. (endocys-bicyclo[2,2,1]hept-5-ene-2,3-dicarboxylic acid), maleic anhydride, citraconic anhydride, and the like.
- Esterified products of ethylenically unsaturated carboxylic acids include methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, n-butyl (meth)acrylate, iso-butyl (meth)acrylate, tert-butyl ( meth)acrylate, n-amyl(meth)acrylate, isoamyl(meth)acrylate, n-hexyl(meth)acrylate, 2-ethylhexyl(meth)acrylate, octyl(meth)acrylate, decyl(meth)acrylate, dodecyl(meth)acrylate Acrylate, octadecyl (meth)acrylate, stearyl (meth)acrylate, tridecyl (meth)acrylate, lauroyl (meth)acrylate, cyclohexyl (meth)acrylate, benzyl (
- Examples of monomers having unsaturated vinyl groups other than olefins include isocyanate group-containing vinyls such as vinyl isocyanate and isopropenyl isocyanate, and aromatic monomers such as styrene, ⁇ -methylstyrene, vinyltoluene, and t-butylstyrene.
- Vinyls vinyls containing amide groups such as acrylamide, methacrylamide, N-methylolmethacrylamide, N-methylolacrylamide, diacetone acrylamide, maleic acid amide, vinyl esters such as vinyl acetate and vinyl propionate, styrene sulfonic acid, Unsaturated sulfonic acids such as sodium styrene sulfonate, 2-acrylamido-2-methylpropanesulfonic acid, and unsaturated phosphorus such as mono(2-methacryloyloxyethyl) acid phosphate and mono(2-acryloyloxyethyl) acid phosphate. Examples include acids.
- Two or more types of these can also be used. Moreover, among these, ethylenically unsaturated carboxylic acid anhydrides are preferred, and maleic anhydride is more preferred.
- unmodified polypropylene resin and modified polypropylene resin are preferably used together. It is preferable to use the polypropylene resin in a weight ratio of 95/5 to 75/25. More preferably 95/5 to 80/20, still more preferably 90/10 to 80/20.
- polyamide resin is a resin whose main raw materials are amino acids, lactams, or diamines and dicarboxylic acids. Typical examples of its main raw materials include amino acids such as 6-aminocaproic acid, 11-aminoundecanoic acid, 12-aminododecanoic acid, para-aminomethylbenzoic acid, lactams such as ⁇ -caprolactam and ⁇ -laurolactam, tetramethylenediamine, Hexamethylene diamine, 2-methylpentamethylene diamine, nonamethylene diamine, undecamethylene diamine, dodecamethylene diamine, 2,2,4-/2,4,4-trimethylhexamethylene diamine, 5-methyl nonamethylene diamine, etc.
- amino acids such as 6-aminocaproic acid, 11-aminoundecanoic acid, 12-aminododecanoic acid, para-aminomethylbenzoic acid
- lactams such as ⁇ -caprolactam and ⁇ -laurol
- Aliphatic diamines aromatic diamines such as metaxylylene diamine and paraxylylene diamine, 1,3-bis(aminomethyl)cyclohexane, 1,4-bis(aminomethyl)cyclohexane, 1-amino-3-aminomethyl- 3,5,5-trimethylcyclohexane, bis(4-aminocyclohexyl)methane, bis(3-methyl-4-aminocyclohexyl)methane, 2,2-bis(4-aminocyclohexyl)propane, bis(aminopropyl)piperazine , alicyclic diamines such as aminoethylpiperazine, aliphatic dicarboxylic acids such as adipic acid, suberic acid, azelaic acid, sebacic acid, dodecanedioic acid, terephthalic acid, isophthalic acid, 2-chloroterephthalic acid, 2-methylterephthalic acid ,
- polyamide resins having a melting point of 200° C. or higher are particularly useful because they have excellent heat resistance and strength.
- Specific examples include polycaproamide (nylon 6), polyhexamethylene adipamide (nylon 66), polycaproamide/polyhexamethylene adipamide copolymer (nylon 6/66), and polytetramethylene adipamide (nylon 6/66).
- nylon 46 polyhexamethylene sebamide (nylon 610), polyhexamethylene dodecamide (nylon 612), polydecamethylene decamide (nylon 1010), polydecamethylene dodecamide (nylon 1012), polydodecamethylene Dodecamide (nylon 1212), polyundecaneamide (nylon 11), polydodecanamide (nylon 12), polyhexamethylene terephthalamide/polycaproamide copolymer (nylon 6T/6), polyhexamethylene adipamide/polyhexamethylene Terephthalamide copolymer (nylon 66/6T), polyhexamethylene adipamide/polyhexamethylene isophthalamide copolymer (nylon 66/6I), polyhexamethylene adipamide/polyhexamethylene terephthalamide/polyhexamethylene isophthalamide copolymer ( Nylon 66/6T/6I), polyhexamethylene terephthalamide/polyhexamethylene terephthal
- the degree of polymerization of these polyamide resins there is no particular restriction on the degree of polymerization of these polyamide resins, and it is preferable that the relative viscosity of a solution of 0.25 g of polyamide resin dissolved in 25 ml of 98% concentrated sulfuric acid at 25° C. is in the range of 1.5 to 5.0. Polyamide resins with a molecular weight in the range of 2.0 to 3.5 are more preferred.
- polycarbonate resin is obtained by reacting dihydric phenol with a carbonate precursor. It may also be a copolymer obtained using two or more dihydric phenols or two or more carbonate precursors. Examples of reaction methods include interfacial polymerization, melt transesterification, solid phase transesterification of carbonate prepolymers, and ring-opening polymerization of cyclic carbonate compounds.
- Such polycarbonate resins are known per se, and for example, polycarbonate resins described in JP-A No. 2002-129027 can be used.
- dihydric phenols examples include 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane, bis(4-hydroxyphenyl)alkanes (such as bisphenol A), and 2,2-bis ⁇ ( Examples include 4-hydroxy-3-methyl)phenyl ⁇ propane, ⁇ , ⁇ '-bis(4-hydroxyphenyl)-m-diisopropylbenzene, 9,9-bis(4-hydroxy-3-methylphenyl)fluorene, etc. . Two or more types of these may be used. Among these, bisphenol A is preferred, and a polycarbonate resin with better impact resistance can be obtained. On the other hand, copolymers obtained using bisphenol A and other dihydric phenols are excellent in high heat resistance or low water absorption.
- carbonate precursor for example, carbonyl halide, carbonic diester, or haloformate is used, and specific examples include phosgene, diphenyl carbonate, or dihaloformate of dihydric phenol.
- a catalyst When producing a polycarbonate resin from the above dihydric phenol and carbonate precursor, a catalyst, a terminal stopper, an antioxidant that prevents oxidation of the dihydric phenol, and the like may be used as necessary.
- the polycarbonate resin in the present invention includes a branched polycarbonate resin copolymerized with a trifunctional or higher polyfunctional aromatic compound, and a branched polycarbonate resin copolymerized with an aromatic or aliphatic (including alicyclic) difunctional carboxylic acid. It includes polyester carbonate resins, copolymerized polycarbonate resins copolymerized with difunctional alcohols (including alicyclic groups), and polyester carbonate resins copolymerized with such difunctional carboxylic acids and difunctional alcohols. These polycarbonate resins are also known. Moreover, you may use 2 or more types of these polycarbonate resins.
- the molecular weight of the polycarbonate resin is not specified, it is preferably one with a viscosity average molecular weight of 10,000 to 50,000. If the viscosity average molecular weight is 10,000 or more, the strength of the molded product can be further improved. More preferably 15,000 or more, and even more preferably 18,000 or more. On the other hand, when the viscosity average molecular weight is 50,000 or less, moldability is improved. It is more preferably 40,000 or less, and even more preferably 30,000 or less. When using two or more types of polycarbonate resins, it is preferable that the viscosity average molecular weight of at least one type is within the above range.
- Such polycarbonate resins have high entropy elasticity, which is advantageous when used in conjunction with gas-assisted molding, etc., and also has properties derived from high entropy elasticity (improved melting properties such as anti-drip properties, drawdown properties, and improved jetting). Demonstrate the characteristics of
- examples of the polyarylene sulfide resin include polyphenylene sulfide (PPS) resin, polyphenylene sulfide sulfone resin, polyphenylene sulfide ketone resin, and random or block copolymers thereof. Two or more types of these may be used. Among them, polyphenylene sulfide resin is particularly preferably used.
- Polyarylene sulfide resins can be used, for example, as described in Japanese Patent Publication No. 45-3368, a method for obtaining a polymer with a relatively small molecular weight, and in Japanese Patent Publication No. 52-12240 and Japanese Patent Application Laid-Open No. 61-7332. It can be produced by any method, such as a method for obtaining a polymer with a relatively large molecular weight.
- the obtained polyarylene sulfide resin is crosslinked/polymerized by heating in air, heat treated in an inert gas atmosphere such as nitrogen or under reduced pressure, washed with an organic solvent, hot water, acid aqueous solution, etc., acid anhydride, Various treatments such as activation with functional group-containing compounds such as amines, isocyanates, and functional group-containing disulfide compounds may be performed.
- the melt viscosity of the polyarylene sulfide resin is preferably 80 Pa ⁇ s or less, more preferably 20 Pa ⁇ s or less under the conditions of 310° C. and a shear rate of 1000/sec. There is no particular restriction on the lower limit, but it is preferably 5 Pa ⁇ s or more. Two or more types of polyarylene sulfide resins having different melt viscosities may be used in combination.
- the melt viscosity can be measured using a capillograph (manufactured by Toyo Seiki Co., Ltd.) under conditions of a die length of 10 mm and a die hole diameter of 0.5 to 1.0 mm.
- polyarylene sulfide resins examples include “Torelina” (registered trademark) manufactured by Toray Industries, Inc., “DIC.PPS” (registered trademark) manufactured by DIC Corporation, and “Durafide” (registered trademark) manufactured by Polyplastics Corporation. It is also possible to use polyphenylene sulfide resin, which is commercially available as a polyphenylene sulfide resin.
- the molding material of the present invention includes, for example, a fiber-reinforced thermoplastic resin molding material (X) and a fiber-reinforced thermoplastic resin molding material (Y).
- the fiber-reinforced thermoplastic resin molding material (X) is composed of the reinforcing fiber (A-1) and the thermoplastic resin (B-1), and the reinforcing fiber (A-1) is a fiber-reinforced thermoplastic resin molding material. It is preferable that they are aligned in the longitudinal direction of the material (X).
- the thermoplastic resin (B-1) may be of the same type as the thermoplastic resin (B).
- the length of the fiber-reinforced thermoplastic resin molding material (X) is preferably 3 to 15 mm, more preferably 5 to 10 mm, from the viewpoint of handleability.
- the reinforcing fiber (A-1) contained in the fiber-reinforced thermoplastic resin molding material (X) may be a composite to which a compound different from the thermoplastic resin (B) is attached.
- the above-mentioned composite refers to a composite in which each single fiber of the reinforcing fiber (A-1) is filled with resin, that is, the reinforcing fiber (A-1) is like an island in a sea of compounds. It is a complex in a dispersed state.
- the reinforcing fiber (A-1) is completely impregnated with the compound, a certain amount of voids may exist in the composite consisting of the reinforcing fiber (A-1) and the compound.
- the void ratio in such a composite is preferably in the range of 0 to 40%. More preferably, it is 0 to 20% or less. When the void ratio is within this range, the effect of promoting impregnation and fiber dispersion is excellent.
- the void content is measured on a portion of the composite using the ASTM D2734 (1997) test method.
- the form of the coating is not particularly limited, but for example, a form in which a part or all of the periphery of the strand-shaped composite is covered with the thermoplastic resin (B) can be mentioned.
- thermoplastic resin (B) it is preferable that 50% or more of the periphery of the strand-like composite is covered, more preferably 80% or more of the periphery of the strand-like composite is covered, and most preferably , the entire periphery of the strand-like composite is coated with the thermoplastic resin (B).
- thermoplastic resin (B) As long as the composite and thermoplastic resin (B) are adhered, there are no particular restrictions on the state of the boundary between the composite and thermoplastic resin (B), but near the boundary between the composite and thermoplastic resin (B) Thermoplastic resin (B) partially enters the composite and is in a state where it is compatible with the compound in the composite, or a state where it is impregnated into the reinforcing fiber (A-1). It is preferable that In such a state, the coated thermoplastic resin (B) will be difficult to peel off from the composite, a molding material with good handling properties can be obtained, and the feed during molding will be stable and uniform plasticization can be achieved. It is possible to develop excellent fluidity.
- FIGS. 3 to 5 schematically represent the shape of the cross section in the orthogonal direction of the molding material of the present invention. This is what I did.
- the cross-sectional shape of the molding material is not limited to that shown in the figure, but as shown in FIG. 1, which is preferably an axial cross-section, the reinforcing fiber (A-1) 1 serves as the core material and the thermoplastic (B) A configuration in which the two layers are sandwiched and arranged is preferable.
- the reinforcing fiber (A-1) 1 has a core structure
- the thermoplastic resin (B) 2 has a sheath structure.
- the molding material preferably has a core-sheath structure in which the thermoplastic resin (B) covers the reinforcing fibers (A-1).
- it may be a multicore sheath structure in which a plurality of reinforcing fibers (A-1) are arranged so as to be covered with the thermoplastic resin (B), and in this case, the number of reinforcing fibers (A) is two or more, 6 or less is preferable.
- thermoplastic resin (B) From the viewpoint of handling of the molding material, it is important that the composite and the thermoplastic resin (B) do not separate until molding, and that the thermoplastic resin (B) maintains a form covering the composite. be. Because the compound has a low molecular weight, it is often a relatively brittle solid that is easily crushed. For this reason, the thermoplastic resin (B) must be placed in a manner that protects the composite to prevent the compound from being crushed and scattered due to impact or abrasion during transportation of the material until molding, handling, etc. is desirable.
- the fiber-reinforced thermoplastic resin molding material (Y) is composed of bundled reinforcing fibers (A-2) and thermoplastic resin (B-2).
- the fiber-reinforced thermoplastic resin molding material (Y) may be pelletized by melt-kneading (for example, a form containing bundled reinforcing fibers (A-2) 3 as shown in FIGS. 7 and 8).
- the thermoplastic resin (B-1) may be of the same type as the thermoplastic resin (B).
- the fiber-reinforced thermoplastic resin molding materials (X) and (Y) may be dry blended to form a molding material mixture.
- the content of reinforcing fiber (A) in the molded product can be easily adjusted.
- dry blending unlike melt kneading, refers to stirring and mixing multiple materials at a temperature that does not melt the resin components to create a substantially uniform state, and is mainly used in injection molding, extrusion molding, etc. , is preferably used when a pellet-shaped molding material is used.
- the molding material of the present invention preferably has a core-sheath structure containing reinforcing fibers (A-1), bundled reinforcing fibers (A-2), and thermoplastic resin (B).
- the core structure of the core-sheath structure includes reinforcing fibers (A-1), and the reinforcing fibers (A-1) are aligned in the longitudinal direction of the molding material
- the sheath structure of the core-sheath structure includes reinforcing fibers (A-1).
- the reinforcing fibers (A-1) are preferably coated with the fiber-reinforced thermoplastic resin composition (C) (for example, FIG. 8).
- the compound (E) is filled between each single fiber of the reinforcing fiber (A-1), thereby improving the dispersibility of the reinforcing fiber when molding the molding material. can be done.
- the above compound (E) preferably has a lower melt viscosity than the thermoplastic resin (B). Since the melt viscosity of the compound (E) is lower than that of the thermoplastic resin (B), the fluidity of the compound (E) is high when molding the molding material, and the thermoplastic resin (B) of the reinforcing fiber (A-1) is ) can further improve the dispersion effect. Further, the compound (E) preferably has a high affinity with the thermoplastic resin (B). By selecting an impregnating resin that has a high affinity with the thermoplastic resin (B), it is efficiently compatible with the thermoplastic resin (B) during the production and molding of molding materials, further improving the dispersibility of reinforcing fibers. can be done.
- the above compound (E) is preferably a resin selected from the group consisting of epoxy resins, phenol resins, terpene resins, and cyclic polyphenylene sulfides.
- the number average molecular weight of compound (E) is preferably 200 to 5,000. When the number average molecular weight is 200 or more, the bending strength and tensile strength of the molded article can be further improved.
- the number average molecular weight is more preferably 1000 or more. In addition, if the number average molecular weight is 5,000 or less, the viscosity of the compound is moderately low, so it is excellent in impregnation into the reinforcing fiber (A), and the dispersibility of the reinforcing fiber in the molded product is further improved. Can be done.
- the number average molecular weight is more preferably 3,000 or less. Note that the number average molecular weight of such a compound can be measured using gel permeation chromatography (GPC).
- the amount of compound (E) is preferably 0.1 to 20 parts by weight, more preferably 3 to 10 parts by weight, relative to 100 parts by weight of the molding material. Within this range, a molding material with excellent moldability and handling properties can be obtained.
- resin component (D) In the reinforcing fiber bundle (A-2) of the present invention, it is preferable that the resin component (D) is attached to the surface of the fiber bundle.
- the resin component (D) is contained in an amount of 7 parts by weight or more based on 100 parts by weight of the bundled reinforcing fibers (A-2). If the amount of the resin component (D) is less than 7 parts by weight, the convergence of the bundled reinforcing fibers (A-2) decreases, which causes increased fiber breakage during injection molding, resulting in a decrease in mechanical properties, which is not preferable. More preferably 8 parts by weight or more, and even more preferably 9 parts by weight. The upper limit is not limited, but is preferably 20 parts by weight or less, more preferably 17 parts by weight or less, and even more preferably 15 parts by weight or less.
- the resin component (D) is preferably a thermosetting resin.
- a thermosetting resin as the resin component (D), the resin component (D) melts and improves convergence when melting and kneading with the thermoplastic resin (B) or (B-2), which is the matrix resin. This is preferable because it can suppress the decrease.
- the fiber-reinforced resin molded product of the present invention is a molded product containing reinforcing fiber (A') and a thermoplastic resin (B).
- the molded article contains 1 to 30 parts by weight of fiber (A') and 70 to 99 parts by weight of thermoplastic resin (B).
- the weight average fiber length Lw(A') of the reinforcing fibers (A') contained in the molded article is 0.1 to 2.9 mm. More preferably, it is 0.3 to 2.5 mm. More preferably, it is 0.5 to 2.0 mm.
- the weight average fiber length of the reinforcing fibers (A') is set to 0.1 mm or more, the mechanical properties of the molded product can be sufficiently exhibited.
- the weight average fiber length of the reinforcing fibers to 2.9 mm or less, fluidity during molding can be improved and poor appearance of the molded product can be suppressed.
- the above weight average fiber length can be measured by the following method. Using an optical microscope equipped with a hot stage, appropriate test pieces were cut out from the molded product and placed between glass plates on a hot stage set appropriately at 150 to 350°C to match the melting temperature of the thermoplastic resin (B) used. The mixture is heated to form a film and uniformly dispersed, and the thermoplastic resin (B) is observed under an optical microscope (50 to 200 times magnification) in a molten state. The fiber length of 1000 randomly selected reinforcing fibers (A') is measured, and the weight average fiber length Lw (A') is calculated from the above formula.
- a test piece cut out from the molded product is placed in a solvent in which the thermoplastic resin (B) is dissolved, and an appropriate heat treatment is applied to prepare a solution in which the reinforcing fibers (A') are uniformly dispersed. Thereafter, the solution is filtered and the reinforcing fibers (A') dispersed on the filter paper are observed using an optical microscope (50 to 200 times magnification). The fiber length of 1000 randomly selected reinforcing fibers (A') is measured, and the weight average fiber length (LwA') is calculated from the above formula.
- examples of the filter paper used at this time include quantitative filter paper (model number: No. 5C) manufactured by Advantech.
- the type of reinforcing fiber (A') is not particularly limited, and the reinforcing fibers mentioned in the description of the reinforcing fiber (A) of the molding material can be exemplified. Moreover, the preferable types and combinations of reinforcing fibers are also the same, and the preferable reasons are also the same.
- the reinforcing fiber (A') is preferably 1 to 30 parts by weight based on 100 parts by weight of (A) and (B). More preferably, it is 5 to 25 parts by weight. If the amount of reinforcing fiber is less than 1 part by weight, the resulting molded product may have insufficient mechanical properties, and if it exceeds 30 parts by weight, the appearance of the molded product may be poor.
- the reinforcing fibers (A') preferably include bundled reinforcing fibers (A-2') composed of 10 or more single yarns having a length of 0.5 to 2.9 mm.
- the effect of including the reinforcing fiber bundle (A-2') is the same as the reason stated in the explanation of the reinforcing fiber bundle (A-2) of the molding material.
- the mechanical properties of the molded product can be sufficiently expressed.
- the weight average fiber length of the bundled reinforcing fibers (A-2') is 2.9 mm or less, fluidity during molding can be improved and poor appearance of the molded product can be suppressed. More preferably, it is 0.3 to 2.5 mm. More preferably, it is 0.5 to 2.0 mm.
- the proportion of reinforcing fibers having a fiber length of 0.3 to 1.0 mm is preferably 40% or more.
- the fiber length ratio of the reinforcing fibers (A') can be calculated from the distribution of 400 reinforcing fibers (A') taken out from the molded product.
- the molded article of the present invention preferably contains 1 to 50 parts by weight of bundled reinforcing fibers (A-2') based on 100 parts by weight of reinforcing fibers (A'). If the content of the bundled reinforcing fibers (A-2') is less than 1 part by weight, the mechanical properties and dimensional accuracy of the molded article will be poor, which is not preferable. If the content of the bundled reinforcing fibers (A-2') exceeds 50 parts by weight, the mechanical properties will be poor, which is not preferable.
- the molded product of the present invention is a fiber-reinforced thermoplastic resin molded product with excellent mechanical properties and dimensional accuracy.
- the molded product made of the molding material of the present invention can be used for electric/electronic equipment, home appliances, automobile parts, etc. It is extremely useful as parts for sports applications. Suitable for electrical/electronic equipment parts such as TVs, video players, DVD players, cameras, audio cases, connectors, speakers, microphones, headphones, small motors, computer-related parts, etc. .
- Home appliances include VTR parts, television parts, irons, hair dryers, rice cooker parts, microwave oven parts, audio parts, audio and visual equipment parts such as audio, laser discs (registered trademark), compact discs, and DVDs, lighting parts, Examples include refrigerator parts, air conditioner parts, typewriter parts, and word processor parts.
- optical equipment and precision machinery related parts include office computer related parts, telephone related parts, facsimile related parts, copying machine related parts, binoculars, cameras, watches, and the like.
- Automotive parts and vehicle-related parts include door pads, pillars, console boxes, various motor housings, roof rails, fenders, garnishes, bumpers, door panels, roof panels, hood panels, trunk lids, door mirror stays, spoilers, hood louvers, and wheels.
- composition of the present invention is also suitable as sporting goods, including golf-related goods such as golf clubs, shafts, grips, and golf balls, tennis rackets, tennis balls, badminton rackets and their guts, and racket sports such as badminton shuttles.
- golf-related goods such as golf clubs, shafts, grips, and golf balls
- tennis rackets tennis balls
- badminton rackets and their guts and racket sports such as badminton shuttles.
- Related products masks for American football, baseball, softball, etc., sports body protection products such as helmets, breast plates, elbow pads, knee pads, shoe-related products such as sole materials for sports shoes, fishing rods, reels, lures, etc.
- summer sports-related items such as surfing, winter sports-related items such as skis and snowboards, and other indoor and outdoor sports-related items.
- Fluidity evaluation (spiral flow length) The flow length was measured when the molding material was molded in an injection molding machine using a mold with a width of 10 mm and a 2 mmt under the temperature conditions shown in Examples, an injection speed of 100 mm/sec, and an injection pressure of 80 MPa. The flow length is the average value of 20 shots. The average value was used for evaluation of each Example and Comparative Example. Judgment was made based on the following criteria, and A and B were determined to be acceptable. A: 100mm or more B: 50mm or more C: Less than 50mm
- a copolymer mainly composed of polyacrylonitrile is spun, fired, and surface oxidized, resulting in a total of 24,000 single fibers.
- Continuous carbon fibers having a diameter of 7 ⁇ m, a mass per unit length of 1.6 g/m, a specific gravity of 1.8 g/cm 3 , and a surface oxygen concentration ratio [O/C] of 0.2 were obtained.
- the strand tensile strength of this continuous carbon fiber was 4,880 MPa, and the strand tensile modulus was 225 GPa.
- a sizing agent mother liquor was prepared by dissolving glycerol polyglycidyl ether as a polyfunctional compound in water to a concentration of 2% by weight, and the sizing agent was applied to the carbon fibers by a dipping method, followed by drying at 230°C. Ta.
- the amount of sizing agent adhered to the carbon fiber thus obtained was 1.0% by weight.
- Reference example 2 Preparation of bundled reinforcing fibers (A-2)-(1) 200 g of crushed and classified waste CFRP (CFRP: carbon fiber reinforced plastic) pieces were spread uniformly on a metal bat, and a The sample was placed in an electric muffle furnace, and while nitrogen gas was introduced into the furnace, the treatment temperature was maintained at a predetermined temperature (400° C.) and heat treatment was performed for a treatment time of 1 hour. Thereafter, the recycled carbon fiber chopped yarn was similarly heat-treated for 1 hour while introducing air into the furnace while maintaining the treatment degree at a predetermined temperature (300° C.) for a treatment time of 1 hour. When the obtained resin component (D) was measured, it was found that 10 parts by weight of the thermosetting resin was attached.
- CFRP carbon fiber reinforced plastic
- Reference example 3 Preparation of bundled reinforcing fibers (A-2)-(2) Spread 200 g of crushed and classified waste CFRP pieces uniformly on a metal vat, put it in an electric muffle furnace with an internal volume of 59 liters, and heat it in the furnace. Heat treatment was carried out for a treatment time of 2 hours while maintaining the treatment temperature at a predetermined temperature (500° C.) while introducing nitrogen gas into the chamber. Thereafter, the recycled carbon fiber chopped yarn was similarly heat-treated for 2 hours while introducing air into the furnace and maintaining the treatment temperature at a predetermined temperature (300° C.). When the obtained resin component (D) was measured, it was found that 5 parts by weight of the thermosetting resin was attached.
- Thermoplastic resin (B)> (B-1) Polycarbonate resin (“Panlite” (registered trademark) L-1225L, manufactured by Teijin Kasei Ltd.) was used. (B-2) The polyphenylene sulfide resin produced in Reference Example 4 was used. (B-3) Pellet blend of polypropylene resin (“Prime Polypro” (registered trademark) J137 manufactured by Prime Polymer Co., Ltd.) and maleic acid-modified polypropylene resin (“Admer” (registered trademark) QE840 manufactured by Mitsui Chemicals, Ltd.) at a weight ratio of 85/15. I used the one I made. (B-4) Polyamide 610 resin (nylon 610 resin "Amilan” (registered trademark) CM2001) was used.
- the extruder cylinder temperature was set at 230° C.
- the polycarbonate resin (B-1) shown above was supplied from the main hopper and melt-kneaded at a screw rotation speed of 200 rpm.
- the amount of compound (E-1) heated and melted at 250° C. was adjusted to be 6 parts by mass based on a total of 100 parts by mass of (A) and (B).
- (F-1) is discharged to impregnate a fiber bundle made of carbon fibers (A-1), and then the compound (E
- a fiber bundle of carbon fibers (A-1) to which carbon fibers (A-1) were applied was supplied and continuously arranged so that the polycarbonate resin (B-1) covered the periphery of the carbon fibers (A-1).
- the fiber bundle internal cross section at this time at least a portion of the carbon fiber (A-1) was in contact with the polycarbonate resin (B-1). After cooling the obtained strand, it was cut into pellets with a length of 7 mm using a cutter to obtain a fiber-reinforced thermoplastic resin molding material (X).
- the take-up speed was adjusted so that the amount of carbon fiber (A-1) was 30 parts by mass relative to the total of 100 parts by mass of (A-1) and (B-1).
- the length of the carbon fibers (A-1) of the obtained fiber-reinforced thermoplastic resin molding material (X) and the pellet length are substantially the same, and the carbon fiber bundles are parallel to the axial direction of the molding material. were paralleled.
- the bundled reinforcing fibers (A-2)-(1) are fed into the molten resin from the side feeder.
- the screw rotation speed was set at 200 rpm.
- the strand discharged from the die was cooled in water, cut into 3.0 mm lengths using a strand cutter, and pelletized to obtain fiber-reinforced thermoplastic resin molding material (Y-1) pellets.
- the bundled reinforcing fibers (A-2)-(1) were added so that the bundled reinforcing fibers (A-2)-(1) were 30 parts by mass to the total of 100 parts by mass of (A-2) and (B-1).
- thermoplastic resin molding materials (X) and (Y-1) thus obtained were dry blended in the proportions shown in Table 1 to form a mixture that would become an intermediate raw material, and an injection molding machine (Japan Steel Works, Ltd.) J110AD), injection time: 2 seconds, back pressure: 5 MPa, holding pressure: 40 MPa, holding pressure time: 10 seconds, cylinder temperature: 260°C, mold temperature: 80°C.
- the composition ratios of (A-1), (A-2) (B) and compound (E) in Table 1 were adjusted by the dry blend ratio.
- the cylinder temperature refers to the temperature of the part of the injection molding machine that heats and melts the molding material
- the mold temperature refers to the temperature of the mold into which resin is injected to form a predetermined shape.
- Examples 2 to 5, 11 and 12, Comparative Examples 1 to 4 A molding material and a molded article piece were obtained in the same manner as in Example 1 above, except that the ratios of each component were set as shown in Tables 1 and 2.
- Example 6 A molding material and a test piece were obtained in the same manner as in Example 1, except that the twin-screw extruder screw rotation speed when producing the fiber-reinforced thermoplastic resin molding material (Y) was set to 500 rpm. The evaluation results are summarized in Table 1.
- Example 7 A molded article was produced in the same manner as in Example 1, except that the composition ratio or the resin type and compound type used were changed as shown in Table 1, and the cylinder temperature was set at 320 ° C. and the mold temperature was set at 130 ° C. , conducted an evaluation. The evaluation results are summarized in Table 1.
- Example 8 A molded product was produced in the same manner as in Example 1, except that the composition ratio or the resin type and compound type used were changed as shown in Table 1, and the cylinder temperature was set at 220 ° C. and the mold temperature was set at 60 ° C. , conducted an evaluation. The evaluation results are summarized in Table 1.
- Example 9 A molded product was produced in the same manner as in Example 1, except that the composition ratio or the resin type and compound type used were changed as shown in Table 1, and the cylinder temperature was set at 270 ° C. and the mold temperature was set at 60 ° C. , conducted an evaluation. The evaluation results are summarized in Table 1.
- the extruder cylinder temperature was set at 230°C
- the bundled reinforcing fibers (A-2)-(1) shown above and the polycarbonate resin (B-1) were fed together from the main hopper, and the extruder cylinder temperature was set at 230°C.
- the mixture was melt-kneaded at a rotational speed of 200 rpm to obtain a fiber-reinforced resin composition (C-1).
- (E-1) is discharged to impregnate the fiber bundle made of carbon fibers (A-1), and then the molten fiber reinforced resin composition (C-1) is discharged into a die opening (diameter 3 mm).
- a fiber bundle of carbon fibers (A-1) to which the compound (E-1) has been added is supplied so that the fiber reinforced resin composition (C-1) covers the periphery of the carbon fibers (A-1). arranged consecutively. At this time, in the internal cross section of the fiber bundle, at least a portion of the carbon fiber (A-1) was in contact with the fiber reinforced resin composition (C-1).
- Examples 1 to 6, 11, and 12 had excellent mechanical properties, dimensional accuracy, and fluidity.
- Examples 7 to 9 showed excellent mechanical properties, dimensional accuracy, and fluidity even when the resin type and compound type were changed.
- Example 10 also showed excellent mechanical properties, dimensional accuracy, and fluidity even when it was made into composite long fiber pellets.
- Comparative Example 1 did not contain the bundled reinforcing fibers (A-2), so the fluidity was poor.
- Comparative Example 2 the impact strength of the molded product was poor because the reinforcing fiber bundle (A-1) was not included.
- Comparative Example 3 because the amount of resin component (D) attached to the bundled reinforcing fiber bundle (A-2) was small, it did not form into a bundle in the molded product, resulting in inferior mechanical properties and dimensional accuracy of the molded product. Furthermore, since the resin was dispersed as single fibers, there was a lot of fiber contact during injection molding, which inhibited resin flow, resulting in poor fluidity.
- Comparative Example 4 because ordinary chopped yarn was used, it did not bundle in the molded product, resulting in poor mechanical properties and dimensional accuracy of the molded product.Furthermore, since it was dispersed as a single yarn, it was difficult to form a bundle during injection molding. The fiber contact increased, inhibiting resin flow, resulting in poor fluidity.
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Abstract
Description
(1)強化繊維(A)と熱可塑性樹脂(B)を含む繊維強化樹脂成形材料であって、
該繊維強化樹脂成形材料が、(A)および(B)の合計100重量部に対して、強化繊維(A)を1~30重量部含み、かつ熱可塑性樹脂(B)を70~99重量部含み、
前記強化繊維(A)は、強化繊維(A-1)と束状強化繊維(A-2)を含み、
前記強化繊維(A-1)は長さ3~15mmであり、かつ成形材料の長手方向に揃っており、強化繊維(A-1)の長さは成形材料の長手方向の長さと同じであり、
前記束状強化繊維(A-2)は、長さ0.5~2.9mmの10本以上の単糸から構成されている、繊維強化樹脂成形材料。
(2)前記繊維強化樹脂成形材料は、繊維強化樹脂成形材料(X)と繊維強化樹脂成形材料(Y)を含み、
繊維強化樹脂成形材料(X)は強化繊維(A-1)と熱可塑性樹脂(B-1)を含み、
強化繊維(A-1)は繊維強化樹脂成形材料(X)の長手方向に揃っており、
繊維強化樹脂成形材料(Y)は束状強化繊維(A-2)と熱可塑性樹脂(B-2)を含む、(1)に記載の繊維強化樹脂成形材料。
(3)前記繊維強化樹脂成形材料が芯鞘構造を有してなり、
前記芯鞘構造の芯構造は強化繊維(A-1)を含み、かつ、強化繊維(A-1)が成形材料の長手方向に揃っており、
前記芯鞘構造の鞘構造は束状強化繊維(A-2)および熱可塑性樹脂(B)を含む繊維強化樹脂組成物(C)であり、
前記鞘構造は前記芯構造を被覆している、(1)または(2)に記載の繊維強化樹脂成形材料。
(4)前記強化繊維(A-1)および束状強化繊維(A-2)がいずれも炭素繊維である、(1)~(3)のいずれかに記載の繊維強化樹脂成形材料。
(5)前記強化繊維(A-1)および束状強化繊維(A-2)の含有量が、強化繊維(A)100重量部に対して、強化繊維(A-1)50~99重量部、束状強化繊維(A-2)1~50重量部である、(1)~(4)のいずれかに記載の繊維強化樹脂成形材料。
(6)前記束状強化繊維(A-2)の繊維束表面に樹脂成分(D)が付着している、(1)~(5)のいずれかに記載の繊維強化樹脂成形材料。
(7)前記樹脂成分(D)が、熱硬化性樹脂であり、束状強化繊維(A-2)100重量部に対して7重量部以上含まれる、(6)に記載の繊維強化樹脂成形材料。
(8)前記熱可塑性樹脂(B)がポリアミド樹脂、ポリカーボネート樹脂、ポリフェニレンスルフィド樹脂およびポリプロピレン樹脂から選ばれる少なくとも1種を含む、(1)~(7)のいずれかに記載の繊維強化樹脂成形材料。
(9)強化繊維(A’)と熱可塑性樹脂(B)を含む繊維強化樹脂成形品であって、
該繊維強化樹脂成形品が、(A’)および(B)の合計100重量部に対して、強化繊維(A’)を1~30重量部含み、かつ熱可塑性樹脂(B)を70~99重量部含み、
強化繊維(A’)の重量平均繊維長Lw(A’)が0.1~2.9mmmmであり、
強化繊維(A’)が長さ0.5~2.9mmの10本以上の単糸から構成される束状強化繊維(A-2’)を含む、繊維強化樹脂成形品。
(10)前記強化繊維(A’)における、0.3~1.0mmの繊維長を有する強化繊維の割合が40%以上である、(9)に記載の繊維強化樹脂成形品。
(11)前記束状強化繊維(A-2’)が、強化繊維(A’)100重量部に対して、1~50重量部含まれる、(9)または(10)に記載の繊維強化樹脂成形品。
(12)前記強化繊維(A’)が炭素繊維である、(9)~(11)のいずれかに記載の繊維強化樹脂成形品。
(13)前記束状強化繊維(A-2’)の繊維束表面に樹脂成分(D)が付着している、(9)~(12)のいずれかに記載の繊維強化樹脂成形品。
(14)前記樹脂成分(D)が、熱硬化性樹脂であり、束状強化繊維(A-2’)100重量部に対して7重量部以上含まれる、(13)に記載の繊維強化樹脂成形品。
(15)前記熱可塑性樹脂(B)がポリアミド樹脂、ポリカーボネート樹脂、ポリフェニレンスルフィド樹脂およびポリプロピレン樹脂から選ばれる少なくとも1種を含む、(9)~(14)のいずれかに記載の繊維強化樹脂成形品。
本発明の成形材料は強化繊維(A)と熱可塑性樹脂(B)を含む。強化繊維(A)を含むことによって、強化繊維の繊維長を長く保つことができ、優れた力学特性を発現することができる。
本発明における強化繊維(A)について説明する。
本発明における強化繊維(A)の種類については、特に制限されず、例えば、炭素繊維、ガラス繊維、アラミド繊維、アルミナ繊維、炭化珪素繊維、ボロン繊維、金属繊維、天然繊維、鉱物繊維などが使用でき、これらは1種または2種以上を併用してもよい。中でも、軽量かつ高強度、高弾性率の成形品を得る観点から、PAN(ポリアクリルニトリル)系、ピッチ系、レーヨン系などの炭素繊維が好ましく用いられる。特に、高強度の観点からは、引張強度が4000MPa以上の強化繊維が好ましく、より好ましくは、5000MPa以上である。高弾性率の観点からは、引張弾性率が200GPa以上の強化繊維が好ましく、より好ましくは、400GPa以上である。特に、繊維長を長く保つことが難しい弾性率が400GPa以上の強化繊維は、後述する本発明の成形材料の効果をより発現できるため好ましい。
本発明の成形材料は、熱可塑性樹脂(B)を強化繊維(A)および熱可塑性樹脂(B)の合計100重量部に対して、70~99重量部含有する。
ηsp/c=[η]+0.45×[η]2c(但し[η]は極限粘度)
[η]=1.23×10-4M0.83
c=0.7
本発明の束状強化繊維(A-2)は、繊維束表面に樹脂成分(D)が付着していることが好ましい。
本発明の繊維強化樹脂成形品は、強化繊維(A’)と熱可塑性樹脂(B)を含む成形品であって、前記(A’)および(B)の合計100重量部に対して、強化繊維(A’)を1~30重量部、熱可塑性樹脂(B)を70~99重量部含む成形品である。
成形品に含まれる強化繊維(A’)の重量平均繊維長Lw(A’)は0.1~2.9mmである。より好ましくは、0.3~2.5mmである。さらに好ましくは0.5~2.0mmである。強化繊維(A’)の重量平均繊維長を0.1mm以上とすることで、成形品の力学特性を十分に発現することができる。一方、強化繊維の重量平均繊維長を2.9mm以下とすることで、成形時の流動性を向上させることができ、成形品の外観不良を抑制できる。
重量平均繊維長=Σ(Mi2×Ni)/Σ(Mi×Ni)
Mi:繊維長(mm)
Ni:繊維長Miの強化繊維の個数
成形品から切り出した試験片を各実施例、比較例で用いた熱可塑性樹脂(B)が溶解する溶剤中に投入し、適宜加熱処理を加え、強化繊維(A)が均一に分散した溶液を得た。その後、アドバンテック社製の定量濾紙(No.5C)を用いて、溶液を濾過して濾紙上に分散した強化繊維(A)を光学顕微鏡(50~200倍)にて観察した。無作為に選んだ1000本の強化繊維(A)の繊維長を計測して、下記式から重量平均繊維長(Lw)を算出した。
平均繊維長=Σ(Mi2×Ni)/Σ(Mi×Ni)
Mi:繊維長(mm)
Ni:繊維長Miの繊維の個数
各実施例および比較例により得られたISO型ダンベル試験片の平行部を切り出し、株式会社東京試験機製C1-4-01型試験機を用い、ISO179に準拠してVノッチ付きシャルピー衝撃試験を実施し、衝撃強度(kJ/cm2)を算出した。
成形材料を射出成形し得られたISO型ダンベル試験片について、ISO178(1993)に従い曲げ特性を測定した。3点曲げ試験冶具(圧子半径5mm)を用いて支点距離を64mmに設定し、試験速度2mm/分の試験条件にて曲げ弾性率を測定した。試験機として、“インストロン(登録商標)”万能試験機5566型(インストロン社製)を用いた。
各実施例および比較例により得られた、80mm×80mm×1mm厚の試験片について、該試験片側面からみた時の該試験片中央部の高さ(t1)と側面から見た端部の高さ(t2)の差(t2-t1)を評価した。試験片1枚につき測定は3回行い、その平均値を各実施例および比較例の評価に使用した。以下の基準で判定を行い、A、Bを合格とした。
A:(t2-t1)=3mm未満
B:(t2-t1)=5mm未満
C:(t2-t1)=5mm以上
成形材料を射出成形機にて、幅10mm、2mmtの金型を用い、実施例に示す温度条件、射出速度100mm/sec、射出圧力80MPaで成形した際の流動長を測定した。流動長は20ショットの平均の値とする。その平均値を各実施例および比較例の評価に使用した。以下の基準で判定を行い、A、Bを合格とした。
A:100mm以上
B:50mm以上
C:50mm未満
強化繊維(A-1)(炭素繊維(A-1))の作製
ポリアクリロニトリルを主成分とする共重合体から紡糸、焼成処理、表面酸化処理を行い、総単糸数24,000本、単繊維径7μm、単位長さ当たりの質量1.6g/m、比重1.8g/cm3、表面酸素濃度比[O/C]0.2の連続炭素繊維を得た。この連続炭素繊維のストランド引張強度は4,880MPa、ストランド引張弾性率は225GPaであった。続いて、多官能性化合物としてグリセロールポリグリシジルエーテルを2重量%になるように水に溶解させたサイジング剤母液を調製し、浸漬法により炭素繊維にサイジング剤を付与し、230℃で乾燥を行った。こうして得られた炭素繊維のサイジング剤付着量は1.0重量%であった。
束状強化繊維(A-2)-(1)の作製
破砕および分級を施した廃CFRP(CFRP:炭素繊維強化プラスチック)片200gを、金属バット上に均一に広げ、内容積5 9リットルの、電気マッフル炉に入れて、炉内に窒素ガスを導入しながら、処理温度を所定温度(400℃)に保って、処理時間1時間で熱処理を行った。その後同様に、炉内に空気を導入しながら、処理度を所定温度(300℃)に保って、処理時間1時間で熱処理を行うことで、リサイクル炭素繊維チョップド糸を得た。得られた樹脂成分(D)を測定したところ熱硬化性樹脂が10重量部付着していた。
束状強化繊維(A-2)-(2)の作製
破砕および分級を施した廃CFRP片200gを、金属バット上に均一に広げ、内容積5 9リットルの、電気マッフル炉に入れて、炉内に窒素ガスを導入しながら、処理温度を所定温度(500℃)に保って、処理時間2時間で熱処理を行った。その後同様に、炉内に空気を導入しながら、処理温度を所定温度(300℃)に保って、処理時間2時間で熱処理を行うことで、リサイクル炭素繊維チョップド糸を得た。得られた樹脂成分(D)を測定したところ熱硬化性樹脂が5重量部付着していた。
ポリフェニレンスルフィド(B-2)の作製
撹拌機付きの20リットルオートクレーブに、47質量%の水硫化ナトリウム水溶液2383g(20.0モル)、水酸化ナトリウム(純度96質量%)848g(20.4モル)、N-メチル-2-ピロリドン(NMP)3271g(33モル)、酢酸ナトリウム541g(6.6モル)、及びイオン交換水3000gを仕込み、常圧で窒素を通じながら225℃まで約3時間かけて徐々に加熱し、水4200gおよびNMP80gを留出したのち、反応容器を150℃に冷却した。仕込み水流化ナトリウム1モル当たりの硫化水素の飛散量は0.018モルであった。次に、p-ジクロロベンゼン(p-DCB)2940g(20モル)、NMP2620g(26.2モル)を加え、反応容器を窒素ガス下に密封し、400rpmで撹拌しながら、227℃まで0.8℃/分の速度で昇温し、その後270℃まで0.6℃/分の速度で昇温し270℃で170分保持した。その後180℃まで0.4℃/分の速度で冷却し、その後室温近傍まで急冷した。内容物を取り出し、10リットルのNMPで希釈後、溶剤と固形物をふるい(80mesh)で濾別し、得られた粒子を20リットルの温水で数回洗浄、濾別し、ポリフェニレンスルフィド(B-1)を得た。これを、80℃で熱風乾燥し、120℃で減圧乾燥した。
(炭素繊維(A-2)-(3))
炭素繊維“トレカ”カットファイバーTV14-006(東レ株式会社製)を使用した。
(B-1)
ポリカーボネート樹脂(帝人化成(株)製、「“パンライト”(登録商標)L-1225L」)を用いた。
(B-2)
参考例4で作製したポリフェニレンスルフィド樹脂を用いた。
(B-3)
ポリプロピレン樹脂(プライムポリマー(株)製“プライムポリプロ”(登録商標)J137)とマレイン酸変性ポリプロピレン樹脂(三井化学(株)製“アドマー”(登録商標)QE840)を重量比85/15でペレットブレンドしたものを用いた。
(B-4)
ポリアミド610樹脂(ナイロン610樹脂「“アミラン”(登録商標)CM2001」)を用いた。
(E-1)
エポキシ樹脂(三菱ケミカル(株)社製、“jER”828)を用いた。
(E-2)
テルペン系樹脂(ヤスハラケミカル(株)社製、“クリアロンM105”)を用いた
(E-3)
テルペンフェノール樹脂(ヤスハラケミカル(株)社製、“YSポリスターN125”)を用いた。
(株)日本製鋼所製TEX-30α型2軸押出機(スクリュー直径30mm、L/D=32)の先端に電線樹脂被覆法用のコーティングダイを設置した 長繊維強化樹脂ペレット製造装置を使用し、押出機シリンダー温度を230℃に設定し、上記に示したポリカーボネート樹脂(B-1)をメインホッパーから供給し、スクリュー回転数200rpmで溶融混練した。250℃にて加熱溶融させた化合物(E-1)を、(A)、(B)の合計100質量部に対し、6質量部となるように吐出量を調整した。その後、(F-1)を吐出し、炭素繊維(A-1)からなる繊維束に含浸付与した後、溶融したポリカーボネート樹脂(B-1)を吐出するダイス口(直径3mm)に化合物(E-1)が付与された炭素繊維(A-1)の繊維束を供給して、炭素繊維(A-1)の周囲をポリカーボネート樹脂(B-1)が被覆するように連続的に配置した 。この時の繊維束内部断面は、炭素繊維(A-1)の少なくとも一部が、ポリカーボネート樹脂(B-1)に接していた。得られたストランドを冷却後、カッターでペレット長7mmに切断し、繊維強化熱可塑性樹脂成形材料(X)とした。この時、(A-1)、(B-1)の合計100質量部に対し、炭素繊維(A-1)が30質量部となるように、引取速度を調整した。得られた繊維強化熱可塑性樹脂成形材料(X)の炭素繊維(A-1)の長さと、ペレット長さは実質的に同じであり、かつ炭素繊維束が成形材料の軸心方向に平行に並列されていた。
表1、表2記載の各成分の比率とした以外は、上記実施例1と同様にして成形材料および成形品片を得た。
繊維強化熱可塑性樹脂成形材料(Y)を作製する際の2軸押出機スクリュー回転数を500rpmに設定した以外は、上記実施例1と同様にして成形材料および試験片を得た。評価結果はまとめて表1に記した。
組成比または用いる樹脂種、化合物種を表1に記載のように変更し、シリンダー温度を320℃、金型温度を130℃に設定した以外は、実施例1と同様にして成形品を作製し、評価を行った。評価結果はまとめて表1に記した。
組成比または用いる樹脂種、化合物種を表1に記載のように変更し、シリンダー温度を220℃、金型温度を60℃に設定した以外は、実施例1と同様にして成形品を作製し、評価を行った。評価結果はまとめて表1に記した。
組成比または用いる樹脂種、化合物種を表1に記載のように変更し、シリンダー温度を270℃、金型温度を60℃に設定した以外は、実施例1と同様にして成形品を作製し、評価を行った。評価結果はまとめて表1に記した。
(株)日本製鋼所製TEX-30α型2軸押出機(スクリュー直径30mm、L/D=32)の先端に設置された電線樹脂被覆法用 のコーティングダイを設置した 長繊維強化樹脂ペレット製造装置を使用し、押出機シリンダー温度を230℃に設定し、上記に示した束状強化繊維(A-2)-(1)とポリカーボネート樹脂(B-1)をあわせてメインホッパーから供給し、スクリュー回転数200rpmで溶融混練し繊維強化樹脂組成物(C-1)とした。250℃にて加熱溶融させた化合物(E-1)を、(A)、(B)の合計100質量部に対し、6質量部となるように吐出量を調整した。その後、(E-1)を吐出し、炭素繊維(A-1)からなる繊維束に含浸付与した後、溶融した繊維強化樹脂組成物(C-1)を吐出するダイス口(直径3mm)に化合物(E-1)が付与された炭素繊維(A-1)の繊維束を供給して、炭素繊維(A-1)の周囲を繊維強化樹脂組成物(C-1)が被覆するように連続的に配置した 。この時の繊維束内部断面は、炭素繊維(A-1)の少なくとも一部が、繊維強化樹脂組成物(C-1)に接していた。得られたストランドを冷却後、カッターでペレット長7mmに切断し、複合型長繊維ペレットとした。この時、(A-1)、(B-1)の合計100質量部に対し、炭素繊維(A-1)が20質量部、(A-2)が10重量部となるように、束状強化繊維(A-2)-(1)の投入量および引取速度を調整した。得られた複合型長繊維ペレットの炭素繊維(A-1)の長さと、ペレット長さは実質的に同じであり、かつ炭素繊維束が成形材料の軸心方向に平行に並列されていた。それ以外は、実施例1と同様にして成形品を作製し、評価を行った。評価結果はまとめて表1に記した。
2 熱可塑性樹脂(B)
3 束状強化繊維(A-2)
Claims (15)
- 強化繊維(A)と熱可塑性樹脂(B)を含む繊維強化樹脂成形材料であって、
該繊維強化樹脂成形材料が、(A)および(B)の合計100重量部に対して、強化繊維(A)を1~30重量部含み、かつ熱可塑性樹脂(B)を70~99重量部含み、
前記強化繊維(A)は、強化繊維(A-1)と束状強化繊維(A-2)を含み、
前記強化繊維(A-1)は長さ3~15mmであり、かつ成形材料の長手方向に揃っており、強化繊維(A-1)の長さは成形材料の長手方向の長さと同じであり、
前記束状強化繊維(A-2)は、長さ0.5~2.9mmの10本以上の単糸から構成されている、繊維強化樹脂成形材料。 - 前記繊維強化樹脂成形材料は、繊維強化樹脂成形材料(X)と繊維強化樹脂成形材料(Y)を含み、
繊維強化樹脂成形材料(X)は強化繊維(A-1)と熱可塑性樹脂(B-1)を含み、
強化繊維(A-1)は繊維強化樹脂成形材料(X)の長手方向に揃っており、
繊維強化樹脂成形材料(Y)は束状強化繊維(A-2)と熱可塑性樹脂(B-2)を含む、請求項1に記載の繊維強化樹脂成形材料。 - 前記繊維強化樹脂成形材料が芯鞘構造を有してなり、
前記芯鞘構造の芯構造は強化繊維(A-1)を含み、かつ、強化繊維(A-1)が成形材料の長手方向に揃っており、
前記芯鞘構造の鞘構造は束状強化繊維(A-2)および熱可塑性樹脂(B)を含む繊維強化樹脂組成物(C)であり、
前記鞘構造は前記芯構造を被覆している、請求項1に記載の繊維強化樹脂成形材料。 - 前記強化繊維(A-1)および束状強化繊維(A-2)がいずれも炭素繊維である、請求項1に記載の繊維強化樹脂成形材料。
- 前記強化繊維(A-1)および束状強化繊維(A-2)の含有量が、強化繊維(A)100重量部に対して、強化繊維(A-1)50~99重量部、束状強化繊維(A-2)1~50重量部である、請求項2に記載の繊維強化樹脂成形材料。
- 前記束状強化繊維(A-2)の繊維束表面に樹脂成分(D)が付着している、請求項1~5のいずれかに記載の繊維強化樹脂成形材料。
- 前記樹脂成分(D)が、熱硬化性樹脂であり、束状強化繊維(A-2)100重量部に対して7重量部以上含まれる、請求項6に記載の繊維強化樹脂成形材料。
- 前記熱可塑性樹脂(B)がポリアミド樹脂、ポリカーボネート樹脂、ポリフェニレンスルフィド樹脂およびポリプロピレン樹脂から選ばれる少なくとも1種を含む、請求項1に記載の繊維強化樹脂成形材料。
- 強化繊維(A’)と熱可塑性樹脂(B)を含む繊維強化樹脂成形品であって、
該繊維強化樹脂成形品が、(A’)および(B)の合計100重量部に対して、強化繊維(A’)を1~30重量部含み、かつ熱可塑性樹脂(B)を70~99重量部含み、
強化繊維(A’)の重量平均繊維長Lw(A’)が0.1~2.9mmmmであり、
強化繊維(A’)が長さ0.5~2.9mmの10本以上の単糸から構成される束状強化繊維(A-2’)を含む、繊維強化樹脂成形品。 - 前記強化繊維(A’)における、0.3~1.0mmの繊維長を有する強化繊維の割合が40%以上である、請求項9に記載の繊維強化樹脂成形品。
- 前記束状強化繊維(A-2’)が、強化繊維(A’)100重量部に対して、1~50重量部含まれる、請求項10に記載の繊維強化樹脂成形品。
- 前記強化繊維(A’)が炭素繊維である、請求項9に記載の繊維強化樹脂成形品。
- 前記束状強化繊維(A-2’)の繊維束表面に樹脂成分(D)が付着している、請求項9~12のいずれかに記載の繊維強化樹脂成形品。
- 前記樹脂成分(D)が、熱硬化性樹脂であり、束状強化繊維(A-2’)100重量部に対して7重量部以上含まれる、請求項13に記載の繊維強化樹脂成形品。
- 前記熱可塑性樹脂(B)がポリアミド樹脂、ポリカーボネート樹脂、ポリフェニレンスルフィド樹脂およびポリプロピレン樹脂から選ばれる少なくとも1種を含む、請求項9~12のいずれかに記載の繊維強化樹脂成形品。
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| US18/863,354 US20250346740A1 (en) | 2022-06-30 | 2023-06-20 | Fiber-reinforced resin molding material and molded article |
| JP2023538133A JP7401029B1 (ja) | 2022-06-30 | 2023-06-20 | 繊維強化樹脂成形材料および成形品 |
| EP23831194.8A EP4549495A1 (en) | 2022-06-30 | 2023-06-20 | Fiber-reinforced resin molding material and molded article |
| CN202380029399.3A CN118922480A (zh) | 2022-06-30 | 2023-06-20 | 纤维增强树脂成型材料和成型品 |
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| JPH04175108A (ja) | 1990-11-09 | 1992-06-23 | Toray Ind Inc | 強化繊維複合ペレット混合物 |
| JPH05212240A (ja) | 1992-02-03 | 1993-08-24 | Mitsubishi Heavy Ind Ltd | 排ガスの処理方法 |
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| WO2019235299A1 (ja) * | 2018-06-07 | 2019-12-12 | 東レ株式会社 | 一体化成形体及びその製造方法 |
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- 2023-06-30 TW TW112124482A patent/TW202409159A/zh unknown
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS617332A (ja) | 1984-06-20 | 1986-01-14 | Kureha Chem Ind Co Ltd | 高分子量ポリアリ−レンスルフイドの製造法 |
| JPH0453368A (ja) | 1990-06-20 | 1992-02-20 | Sharp Corp | ビデオカメラの制御装置 |
| JPH04175108A (ja) | 1990-11-09 | 1992-06-23 | Toray Ind Inc | 強化繊維複合ペレット混合物 |
| JPH05212240A (ja) | 1992-02-03 | 1993-08-24 | Mitsubishi Heavy Ind Ltd | 排ガスの処理方法 |
| JP2002129027A (ja) | 2000-10-25 | 2002-05-09 | Teijin Chem Ltd | 熱可塑性樹脂組成物 |
| JP2006181776A (ja) | 2004-12-27 | 2006-07-13 | Toray Ind Inc | 成形用繊維強化難燃樹脂混合物および成形品 |
| JP2012116917A (ja) | 2010-11-30 | 2012-06-21 | Toray Ind Inc | 繊維強化樹脂ペレット |
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| WO2019235299A1 (ja) * | 2018-06-07 | 2019-12-12 | 東レ株式会社 | 一体化成形体及びその製造方法 |
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