WO2019111737A1 - 複合積層体及びその製造方法 - Google Patents
複合積層体及びその製造方法 Download PDFInfo
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- WO2019111737A1 WO2019111737A1 PCT/JP2018/043317 JP2018043317W WO2019111737A1 WO 2019111737 A1 WO2019111737 A1 WO 2019111737A1 JP 2018043317 W JP2018043317 W JP 2018043317W WO 2019111737 A1 WO2019111737 A1 WO 2019111737A1
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Definitions
- the present invention relates to a fiber reinforced composite laminate and a method for producing the composite laminate.
- Fiber reinforced resins are used in various fields such as golf clubs, tennis racquets, aircrafts, automobiles, etc. as materials to replace metal because they are light and strong.
- fiber-reinforced resins are attracting attention in the automotive field because weight reduction of automobiles is required in recent years to achieve low fuel consumption.
- a fiber-reinforced resin made of a thermosetting resin requires heat treatment (curing reaction) after molding, and therefore can not achieve high productivity and low cost, which are essential in the production of automobile parts. Therefore, a fiber reinforced thermoplastic resin (hereinafter also referred to as "FRTP”) using a thermoplastic resin which is easy to mold instead of a thermosetting resin is required.
- FRTP fiber reinforced thermoplastic resin
- a sheet obtained by impregnating a thermoplastic resin with a continuous fiber called a prepreg is laminated, and heating and pressing is performed by a press or the like, and stamping forming is generally performed to a desired shape. ing. Since the member obtained by this uses continuous fiber, it is possible to design to the outstanding mechanical property, and the dispersion
- Patent Document 1 it is possible to mold for a short period of time by cutting into a prepreg made of continuous fibers and a thermoplastic resin, showing excellent shaping during molding, and excellent when used as an FRTP member. It has been proposed that the mechanical properties can be expressed.
- Patent Document 2 proposes using a prepreg containing non-continuous fibers and thermoplastic fibers.
- Patent Document 1 and Patent Document 2 there is a problem that when forming the FRTP by laminating the prepregs, the laminated base material is fixed to the belt or the mold of the molding machine and the FRTP member can not be stably obtained. there were.
- a mold release agent As a method of preventing material sticking to the mold of the molding machine, transfer of the mold release agent to the surface of the FRTP member may deteriorate the surface property (poor appearance) .
- a release film is used to avoid this.
- the use of the release film inhibits the heat transfer from the mold being heated or cooled to the laminated substrate. If heat transfer from the mold to the laminated base material is hindered, melting and cooling solidification of the thermoplastic resin become insufficient, and mechanical properties such as strength and rigidity of the obtained FRTP member become low. If the temperature of the mold is excessively raised or lowered to solve this problem, the mold may repeatedly contract, expand, and be damaged. In that case, it is not possible to stably manufacture an FRTP member having a good surface appearance and an excellent quality.
- FRTP members for automobile exteriors are members that are strongly affected by the user's vision and feeling, and the commercial value of FRTP members with poor surface properties is significantly reduced, so that not only rigidity and formability, but also good It is desirable to require a surface appearance. Therefore, Patent Document 3 proposes that the thickness of the release film be 10 times or less that of the prepreg or that a plate subjected to release treatment be used.
- Patent Document 3 does not propose a method for stably manufacturing an FRTP member having a good surface appearance and an excellent quality without using a method such as a release film.
- An object of the present invention is to provide a composite laminate excellent in mold releasability in a production process and excellent in surface appearance (surface smoothness) and a method of producing the composite laminate.
- the present invention provides the following composite laminate and a method for producing the same.
- Item 1 An inorganic fiber comprising an A layer and a B layer, wherein the A layer is provided on one side or both sides of the B layer, and the A layer has an average fiber length of 1 ⁇ m to 300 ⁇ m ( A composite laminate comprising a1) and a thermoplastic resin (a2), wherein the B layer comprises reinforcing fibers (b1) having an average fiber length of 1 mm or more and a thermoplastic resin (b2).
- Item 2 The composite laminate according to item 1, wherein the average aspect ratio of the inorganic fiber (a1) is 3 to 200.
- Item 3 The composite laminate according to item 1 or 2, wherein the inorganic fiber (a1) is at least one selected from the group consisting of potassium titanate and wollastonite.
- Item 4 The item according to any one of Items 1 to 3, wherein the content of the inorganic fiber (a1) is 1% by mass to 40% by mass in 100% by mass of the total amount of the components contained in the A layer. Composite laminates.
- Item 5 The composite laminate according to any one of Items 1 to 4, wherein the reinforcing fiber (b1) is at least one selected from the group consisting of carbon fiber, glass fiber and aramid fiber.
- Item 6 The composite laminate according to any one of Items 1 to 5, wherein the average fiber diameter of the reinforcing fibers (b1) is 1 ⁇ m to 50 ⁇ m.
- Item 7 The item according to any one of Items 1 to 6, wherein the content of the reinforcing fiber (b1) is 10% by mass to 80% by mass in 100% by mass of the total amount of the components contained in the B layer.
- Composite laminates are 10% by mass to 80% by mass in 100% by mass of the total amount of the components contained in the B layer.
- thermoplastic resin (a2) is a polyolefin resin, polystyrene resin, polyester resin, aliphatic polyamide (PA) resin, semiaromatic polyamide (PA) resin, polyphenylene sulfide (PPS) resin, polyether aromatic Item 8.
- the thermoplastic resin (b2) is a polyolefin resin, polystyrene resin, polyester resin, aliphatic polyamide (PA) resin, semiaromatic polyamide (PA) resin, polyphenylene sulfide (PPS) resin, polyether aromatic 9.
- Item 10 The composite laminate according to any one of items 1 to 9, wherein the maximum height (Sz) of the surface of the layer A is 50 ⁇ m or less.
- Item 11 The composite laminate according to any one of Items 1 to 10, which is for automobile members.
- Item 12 A method for producing a composite laminate according to any one of items 1 to 11, comprising: a sheet containing reinforcing fibers (b1) having an average fiber length of 1 mm or more and a thermoplastic resin (b2) disposing a film (a3) containing an inorganic fiber (a1) having an average fiber length of 1 ⁇ m to 300 ⁇ m and a thermoplastic resin (a2) on one side or both sides of b3), and heating and pressing the laminate
- Item 13 The method for producing a composite laminate according to Item 12, wherein the thickness of the film (a3) is less than 500 ⁇ m.
- Item 14 The method for producing a composite laminate according to Item 12 or 13, wherein the thickness of the sheet (b3) is 0.3 mm to 15 mm.
- the manufacturing method of the composite laminated body excellent in the mold release property in a manufacturing process, and excellent in the surface external appearance (surface smoothness), and a composite laminated body can be provided.
- FIG. 1 is a schematic cross-sectional view showing a composite laminate according to a first embodiment of the present invention.
- FIG. 2 is a schematic cross-sectional view showing a composite laminate according to a second embodiment of the present invention.
- the composite laminate of the present invention comprises an A layer containing inorganic fibers (a1) having an average fiber length of 1 ⁇ m to 300 ⁇ m and a thermoplastic resin (a2), and reinforcing fibers (b1) having an average fiber length of 1 mm or more. It is a composite laminated body provided with B layer containing a thermoplastic resin (b2).
- FIG. 1 is a schematic cross-sectional view showing a composite laminate according to the first embodiment of the present invention.
- the composite laminate 1 includes an A layer 2 as a first layer and a B layer 3 as a second layer.
- the B layer 3 has a first main surface 3a and a second main surface 3b facing each other.
- An A layer 2 is provided on the first major surface 3 a of the B layer 3.
- the A layer 2 contains an inorganic fiber (a1) having an average fiber length of 1 ⁇ m to 300 ⁇ m and a thermoplastic resin (a2).
- the B layer 3 contains a reinforcing fiber (b1) having an average fiber length of 1 mm or more and a thermoplastic resin (b2).
- FIG. 2 is a schematic cross-sectional view showing a composite laminate according to a second embodiment of the present invention. As shown in FIG. 2, in the composite laminate 21, the A layer 2 is provided also on the second major surface 3 b of the B layer 3. The other points are the same as in the first embodiment.
- the A layer may be provided only on one side of the B layer, and the A layer is provided on both sides of the B layer. It may be
- the A layer constituting the composite laminate of the present invention is a layer containing an inorganic fiber (a1) having an average fiber length of 1 ⁇ m to 300 ⁇ m and a thermoplastic resin (a2), and the A layer is one side of the B layer described later. Or exist on both sides.
- the thickness of layer A is preferably smaller than that of layer B, more preferably less than 500 ⁇ m, still more preferably 50 ⁇ m to 450 ⁇ m, particularly preferably 50 ⁇ m to 250 ⁇ m, and most preferably 50 ⁇ m to 100 ⁇ m. . If the thickness of layer A is too thick, the content of reinforcing fibers in the composite laminate may be reduced, which may lead to a reduction in strength. On the other hand, when the thickness of the A layer is smaller than the thickness of the B layer, it is possible to make the most of the mechanical properties of the B layer and to obtain a composite laminate having even more excellent mechanical properties.
- the thickness of the layer A when the layer A is present on both sides of the layer B refers to the total thickness of the layers A on both sides.
- the inorganic fibers (a1) used in the layer A are powders composed of fibrous particles, and the average fiber length is 1 ⁇ m to 300 ⁇ m, preferably 1 ⁇ m to 200 ⁇ m, and more preferably 3 ⁇ m to 100 ⁇ m. More preferably, it is 5 ⁇ m to 50 ⁇ m.
- the average aspect ratio of the inorganic fiber (a1) is preferably 3 to 200, more preferably 3 to 100, still more preferably 5 to 50, and particularly preferably 10 to 40.
- the inorganic fiber (a1) used in the present invention preferably has a Mohs hardness of 5 or less from the viewpoint of the sliding properties of the composite laminate, and for example, potassium titanate, wollastonite, aluminum borate, boric acid Examples thereof include magnesium, zonolite, zinc oxide, basic magnesium sulfate and the like. From the viewpoint of these mechanical properties, at least one selected from the group consisting of potassium titanate and wollastonite is preferable.
- the Mohs hardness is an index that indicates the hardness of a substance, and if the minerals are rubbed against each other to be damaged, the substance becomes smaller in hardness.
- potassium titanate As potassium titanate, conventionally known ones can be widely used, and potassium tetratitanate, potassium hexatitanate, potassium octatitanate and the like can be mentioned.
- the size of potassium titanate is not particularly limited as long as it is the range of the size of the above-mentioned inorganic fiber, but the average fiber diameter is preferably 0.01 ⁇ m to 1 ⁇ m, more preferably 0.05 ⁇ m to 0.8 ⁇ m, still more preferably 0.1 ⁇ m to 0.7 ⁇ m, average fiber length is preferably 1 ⁇ m to 50 ⁇ m, more preferably 3 ⁇ m to 30 ⁇ m, still more preferably 10 ⁇ m to 20 ⁇ m, average aspect ratio is preferably 10 or more, more preferably 10 to 100, more preferably Is 15-35.
- the present invention can also be used as a commercial product, for example, “TISMOD” (average fiber length 15 ⁇ m, average fiber diameter 0.5 ⁇ m) manufactured by Otsuka Chemical Co., Ltd., “TISMON” (average fiber length 15 ⁇ m, average fiber diameter 0.5 ⁇ m) Etc. can be used.
- TISMOD average fiber length 15 ⁇ m, average fiber diameter 0.5 ⁇ m
- TISMON average fiber length 15 ⁇ m, average fiber diameter 0.5 ⁇ m
- Wollastonite is an inorganic fiber composed of calcium metasilicate.
- the size of wollastonite is not particularly limited as long as it is the range of the size of the above-mentioned inorganic fiber, but the average fiber diameter is preferably 0.1 ⁇ m to 15 ⁇ m, more preferably 1 ⁇ m to 10 ⁇ m, still more preferably 2 ⁇ m to 7 ⁇ m
- the fiber length is preferably 3 ⁇ m to 180 ⁇ m, more preferably 10 ⁇ m to 100 ⁇ m, still more preferably 20 ⁇ m to 40 ⁇ m, and the average aspect ratio is preferably 3 or more, more preferably 3 to 30, still more preferably 5 to 15.
- commercially available products can also be used.
- “Vistal W” average fiber length 25 ⁇ m, average fiber diameter 3 ⁇ m
- Otsuka Chemical Co., Ltd. can be used.
- the average fiber length and average fiber diameter described above can be measured by observation with a scanning electron microscope, and the average aspect ratio (average fiber length / average fiber diameter) can be calculated from the average fiber length and average fiber diameter. For example, a plurality of inorganic fibers are photographed by a scanning electron microscope, 300 inorganic fibers are arbitrarily selected from the observation image, their fiber lengths and fiber diameters are measured, and all the fiber lengths are integrated to obtain the number The average fiber length can be obtained by dividing all of the fiber diameter by dividing by the number of fibers.
- the fibrous particle means the longest side of the rectangular parallelepiped (the circumscribed rectangular parallelepiped) having the smallest volume of the rectangular parallelepiped circumscribing the particle, the major axis L, the second longest side the minor axis B, and the shortest side the thickness.
- T B> T
- L / B and L / T both mean particles of 3 or more
- the major axis L corresponds to the fiber length
- the minor axis B corresponds to the fiber diameter.
- Non-fibrous particles mean particles with L / B smaller than 3, and among non-fibrous particles, particles with L / B smaller than 3 and particles with L / T 3 or more are called plate-like particles .
- the inorganic fiber is a treated layer comprising a surface treatment agent on the surface of the inorganic fiber used in the present invention in order to enhance the wettability with the thermoplastic resin and to further improve the physical properties such as mechanical strength of the obtained resin composition. May be formed.
- a silane coupling agent As a surface treatment agent, a silane coupling agent, a titanium coupling agent, etc. are mentioned. Among these, a silane coupling agent is preferable, and an amino type silane coupling agent, an epoxy type silane coupling agent, and an alkyl type silane coupling agent are more preferable.
- the surface treatment agents may be used alone or in combination of two or more.
- amino type silane coupling agent for example, N-2- (aminoethyl) -3-aminopropylmethyldimethoxysilane, N-2- (aminoethyl) -3-aminopropyltrimethoxysilane, 3-aminopropyltrile.
- Methoxysilane, 3-aminopropyltriethoxysilane, 3-ethoxysilyl-N- (1,3-dimethylbutylidene) propylamine, N-phenyl-3-aminopropyltrimethoxysilane, N- (vinylbenzyl) -2 -Aminoethyl-3-aminopropyltrimethoxysilane etc. can be mentioned.
- epoxy-based silane coupling agents include 3-glycidyloxypropyl (dimethoxy) methylsilane, 3-glycidyloxypropyltrimethoxysilane, diethoxy (3-glycidyloxypropyl) methylsilane, triethoxy (3-glycidyloxypropyl) silane, Examples include 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane and the like.
- alkyl silane coupling agent for example, methyltrimethoxysilane, dimethyldimethoxysilane, trimethylmethoxysilane, methyltriethoxysilane, ethyltrimethoxysilane, n-propyltrimethoxysilane, isobutyltrimethoxysilane, isobutyltriethoxysilane And n-hexyltrimethoxysilane, n-hexyltriethoxysilane, cyclohexylmethyldimethoxysilane, n-octyltriethoxysilane, n-decyltrimethoxysilane and the like.
- a method of forming a treatment layer comprising a surface treatment agent on the surface of an inorganic fiber known surface treatment methods can be used.
- a solvent that promotes hydrolysis eg, water, alcohol, or a mixed solvent thereof
- the surface treatment agent is dissolved in the solution to form a solution, and the solution is sprayed onto inorganic fibers by a wet method, or an integral blend method in which an inorganic fiber and a surface treatment agent are blended in a resin composition.
- the amount of the surface treatment agent when treating the surface treatment agent to the surface of the inorganic fiber used in the present invention is not particularly limited, but in the case of a wet method, for example, 0.
- the solution of the surface treatment agent may be sprayed to 1 part by mass to 20 parts by mass.
- the surface treatment agent is preferably used in an amount of 1 to 50 parts by mass, more preferably 10 to 40 parts by mass, based on 100 parts by mass of the inorganic fiber. It may be blended into the composition.
- the content of the inorganic fiber (a1) is preferably 1% by mass to 40% by mass, and more preferably 3% by mass to 30% by mass in 100% by mass of the total amount of components contained in the layer A. More preferably, it is 5% by mass to 20% by mass.
- the inorganic fiber (a1) By setting the inorganic fiber (a1) to 1% by mass or more, the surface smoothness of the composite laminate can be further improved, and by setting it to 40% by mass or less, the film forming property of the film described later is further improved. .
- thermoplastic resin (a2) used for the layer A is not particularly limited as long as it is a thermoplastic resin that can be formed into a film, for example, polypropylene (PP) resin, polyethylene (PE) resin, cyclic polyolefin (COP) resin , Polyolefin resins such as cyclic olefin copolymer (COC) resin; polystyrene (PS) resin, syndiotactic polystyrene (SPS) resin, high impact polystyrene (HIPS) resin, acrylonitrile-butylene-styrene copolymer (ABS) resin Methyl methacrylate / styrene copolymer (MS), methyl methacrylate / styrene / butadiene copolymer (MBS), styrene / butadiene copolymer (SBR), styrene / iso
- PP polypropylene
- PE
- polyolefin resins polystyrene resins, polyester resins, aliphatic polyamide (PA) resins, semiaromatic polyamide (PA) resins, polyphenylene sulfide (PPS) resins, polyether aromatic ketone resins, polyetherimides
- PA polyamide
- PPS polyphenylene sulfide
- polyetherimides Preferably, it is at least one selected from the group consisting of PEI) resin and thermoplastic polyimide (TPI) resin.
- thermoplastic resins selected from the above thermoplastic resins, that is, a polymer alloy or the like can also be used.
- thermoplastic resin (a2) is preferably the same type as the thermoplastic resin (b2) described later, from the viewpoint of further enhancing the adhesion to the B layer.
- thermoplastic resin (b2) is an aliphatic polyamide (PA)
- thermoplastic resin (a2) is preferably an aliphatic polyamide (PA) resin or a semiaromatic polyamide (PA).
- thermoplastic resin (a2) is not particularly limited as long as it can be melt-kneaded, and, for example, any of powder, granules, and pellets can be used.
- the content of the thermoplastic resin (a2) is preferably 60% by mass to 99% by mass, and more preferably 70% by mass to 97% by mass in 100% by mass of the components contained in the layer A. And 80% by mass to 95% by mass.
- the layer A can contain other additives as long as the preferred physical properties are not impaired.
- Other additives include aramid fibers, polyphenylene benzoxazole (PBO) fibers, glass fibers, carbon fibers, alumina fibers, boron fibers, silicon fibers, calcium carbonate, mica, mica, sericite, illite, talc, kaolinite, Inorganic fillers other than the above-mentioned inorganic fibers (a1) such as montmorillonite, boehmite, smectite, vermiculite, titanium dioxide, silica, potassium titanate, lithium potassium titanate, boehmite, glass beads, alumina, etc .; polytetrafluoroethylene (PTFE) , Low density polyethylene, linear low density polyethylene, medium density polyethylene, high density polyethylene, polyolefin resin such as ultra high molecular weight polyethylene, graphite, solid such as molybdenum disulfide disulfide
- Lubricants heat stabilizers such as copper compounds; light stabilizers such as hindered phenol light stabilizers; nucleation agents; antistatic agents such as anionic antistatic agents, cationic antistatic agents, nonionic antistatic agents Anti-aging agents (antioxidants); weathering agents; light-resisting agents; metal deactivators; benzophenone-based UV absorbers, benzotriazole-based UV absorbers, triazine-based UV absorbers, UV absorbers such as silylylate-based UV absorbers Antibacterial / antifungal agent; Deodorant; Carbon-based conductive agent, metal-based conductive agent, metal oxide-based conductive agent, conductivity-imparting agent such as surfactant; Dispersing agent; Polyester-based plasticizer, Glycerin-based plasticizer Softeners (plasticizers) such as polyvalent carboxylic acid ester type plasticizers, phosphoric acid ester type plasticizers, polyalkylene glycol type plasticizers, epoxy type plasticizers; Faces such as carbon black and titanium
- the amount thereof is not particularly limited as long as the preferred physical properties of the present invention are not impaired, and preferably 5% by mass in 100% by mass of the components contained in the layer A
- the following content is more preferably 1% by mass or less.
- a film (a3) constituting layer A and a sheet (b3) constituting layer B are respectively prepared, and the film (a3) is formed on one side or both sides of sheet (b3) It is obtained by integrating the film (a3) and the sheet (b3) by stacking and arranging the obtained laminate and heating and pressing the obtained laminate with a molding machine.
- melt film-forming methods such as T die-casting method, a calendar method, a press method, are employable.
- a method of melt film formation by directly mixing the inorganic fiber (a1), the thermoplastic resin (a2) and, if necessary, other additives so as to achieve the above content; Inorganic fiber (a1), thermoplastic resin (a2) and, if necessary, other additives are melt-kneaded in advance so that the content is obtained, and pellets of the mixture are produced, and melt film-forming is performed using this. And the like.
- the film (a3) may be any of a stretched film and a non-stretched film, but a stretched film is preferable because it can prevent wrinkling and sagging due to shrinkage upon heating and melting to further improve the appearance of a molded product.
- the stretching ratio is preferably 2 to 15 times.
- the draw ratio is the area ratio obtained by multiplying the draw ratio in the transverse direction with the draw ratio in the longitudinal direction based on the film size from which the casting roll has come out during film formation.
- the thickness of the film (a3) constituting the layer A before producing the composite laminate of the present invention is preferably less than 500 ⁇ m, more preferably 50 ⁇ m to 450 ⁇ m, and 50 ⁇ m to 250 ⁇ m. More preferable. If the thickness of the film (a3) constituting the layer A is less than 500 ⁇ m, the surface smoothness of the surface of the composite laminate after stamping can be further improved without impairing the mechanical properties of the composite laminate. .
- the layer B constituting the composite laminate of the present invention is a layer containing reinforcing fibers (b1) having an average fiber length of 1 mm or more and a thermoplastic resin (b2), and is a core layer of the composite laminate.
- a composite laminate of excellent mechanical properties can be obtained.
- the thickness of the layer B can be arbitrarily selected according to the shape of the target member, and is preferably 0.3 mm to 15 mm, and more preferably 1 mm to 12 mm from the viewpoint of mechanical properties.
- the reinforcing fibers (b1) used in the B layer are not particularly limited as long as the average fiber length is 1 mm or more, and inorganic fibers, organic fibers, metal fibers, or a combination of two or more of them can be used.
- inorganic fibers include carbon fibers, graphite fibers, silicon carbide fibers, alumina fibers, tungsten carbide fibers, boron fibers, glass fibers and the like.
- the organic fibers include aramid fibers, polyparaphenylene benzoxazole (PBO) fibers, high density polyethylene fibers, other common polyamide fibers, polyesters and the like.
- metal fibers include fibers of stainless steel, iron and the like, and metal-coated carbon fibers may also be used. Among these, at least one selected from the group consisting of carbon fiber, glass fiber and aramid fiber is preferable. From the viewpoint of further improving mechanical properties such as strength of the final molded product, carbon fiber is more preferable. As a kind of carbon fiber, a pitch type carbon fiber, PAN type carbon fiber, etc. are mentioned, for example.
- the average fiber diameter of the reinforcing fibers (b1) is preferably 1 ⁇ m to 50 ⁇ m, and more preferably 5 ⁇ m to 20 ⁇ m.
- the reinforcing fiber may be a bundle of reinforcing fibers aggregated by a focusing agent or the like if it has the above-mentioned average fiber diameter.
- the average fiber length is preferably 1 mm to 100 mm, and more preferably 2 mm to 50 mm.
- the content of the reinforcing fiber (b1) is preferably 10% by mass to 80% by mass, and more preferably 20% by mass to 70% by mass in 100% by mass of the components contained in the B layer. More preferably, it is 30% by mass to 60% by mass.
- the reinforcing fibers (b1) By setting the reinforcing fibers (b1) to 10% by mass or more, a further reinforcing effect by the fibers is obtained, and by setting the reinforcing fibers to 80% by mass or less, the productivity of the sheet described later is further improved.
- thermoplastic resin (b2) used for the layer B is not particularly limited as long as it is a thermoplastic resin used as a binder resin of a prepreg, and, for example, polypropylene (PP) resin, polyethylene (PE) resin, cyclic polyolefin ( COP) resin, polyolefin resin such as cyclic olefin copolymer (COC) resin; polystyrene (PS) resin, syndiotactic polystyrene (SPS) resin, high impact polystyrene (HIPS) resin, acrylonitrile-butylene-styrene copolymer ( ABS) resin, methyl methacrylate / styrene copolymer (MS), methyl methacrylate / styrene / butadiene copolymer (MBS), styrene / butadiene copolymer (SBR), styrene / butadiene copolymer (
- polyolefin resins polystyrene resins, polyester resins, aliphatic polyamide (PA) resins, semiaromatic polyamide (PA) resins, polyether aromatic ketone resins, polyetherimide (PEI) resins and thermoplastic polyimides It is preferable that it is at least 1 sort (s) chosen from the group which consists of (TPI) resin.
- thermoplastic resins selected from the above thermoplastic resins, that is, a polymer alloy or the like can also be used.
- thermoplastic resin (b2) is not particularly limited as long as it can be melt-kneaded, and, for example, any of powder, granules, and pellets can be used.
- the content of the thermoplastic resin (b2) is preferably 20% by mass to 90% by mass, and more preferably 30% by mass to 80% by mass in 100% by mass of the total amount of the components contained in the layer B. And 40% by mass to 70% by mass.
- a film (a3) constituting the layer A and a sheet (b3) constituting the layer B are respectively prepared, and the film (a3) is laminated on one side or both sides of the sheet (b3)
- the obtained laminate is heated and pressed by a molding machine to obtain the film (a3) and the sheet (b3).
- the sheet (b3) constituting the layer B a plurality of prepregs in which the reinforcing fiber (b1) is impregnated with the thermoplastic resin (b2) is laminated so as to have the above content, and the obtained laminate is molded It is obtained by integrating by heating and pressurizing with a machine. Further, a prepreg obtained by impregnating the reinforcing fiber (b1) with the thermoplastic resin (b2) can also be used as it is. That is, a prepreg obtained by impregnating the reinforcing fiber (b1) with the thermoplastic resin (b2) may be used as it is as the sheet (b3).
- thermoplastic resin (b2) in the form of a sheet of film, non-woven fabric, mat, woven / knit etc are prepared, and between the two sheets, reinforcing fibers (b1) are made into a sheet
- a method can be mentioned which is obtained by sandwiching the arranged sheets or the sheet (nonwoven material) prepared by the paper making method by cutting the reinforcing fibers (b1), and performing heating and pressing. More specifically, the two sheets of thermoplastic resin are delivered, the two sheets are delivered from two rolls, and the sheet of reinforcing fibers supplied from the roll of sheets of reinforcing fiber is two thermoplastic sheets. After being sandwiched between sheets made of resin, heat and pressure are applied.
- thermoplastic resin constituting the sheet does not have to be one type, and a sheet made of another type of thermoplastic resin may be further laminated using the above-described apparatus.
- the heating temperature is preferably 100 ° C. to 400 ° C., although it depends on the type of the thermoplastic resin (b2).
- the pressure at the time of pressurization is preferably in the range of usually 0.1 MPa to 10 MPa. Within this range, the thermoplastic resin (b2) can be further impregnated between the reinforcing fibers (b1) contained in the prepreg, which is preferable.
- a prepreg comprising a reinforcing fiber (b1) and a thermoplastic resin (b2)
- a prepreg that can be used for the composite laminate of the present invention is a laser marker
- the reinforcing fiber (b1) is cut by cutting, but from the viewpoint of mechanical properties and fluidity, the length of the cut reinforcing fiber (b1) is preferably 5 mm to 100 mm, 10 mm to 50 mm Is more preferred.
- Two or more sheets of the prepreg obtained as described above may be laminated so that the direction of the reinforcing fibers (b1) is pseudo-isotropic, or alternately laminated, to prepare a laminated base.
- the laminated base material is preferably laminated so as to have 4 to 96 layers of prepreg.
- a more preferable range of the number of layers of the prepreg is 8 to 32 layers.
- the sheet (b3) may be produced by heating and pressing the laminated base obtained as described above to form an integrated laminated base.
- the composite laminate of the present invention can be produced simultaneously with the production of the sheet (b3) by arranging the film (a3) between the laminate base and the mold of the press. It is preferable to carry out a cooling step after the heating step. By the cooling, the thermoplastic resin is solidified, so that the handling of the sheet (b3) is further facilitated.
- heating at 100 ° C. to 400 ° C. is preferable, and heating at 150 ° C. to 350 ° C. is more preferable.
- preheating may be performed prior to the heating. For preheating, heating at a temperature of usually 150 ° C. to 400 ° C., preferably 200 ° C. to 380 ° C. is preferable.
- the pressure applied to the laminated base material in the above pressure application is preferably 0.1 MPa to 10 MPa, and more preferably 0.2 MPa to 2 MPa.
- the pressure is a value obtained by dividing the pressing force by the area of the laminated base material.
- the heating and pressurizing time is preferably 0.1 minutes to 30 minutes, and more preferably 0.5 minutes to 20 minutes.
- the cooling time to be provided after heating and pressurizing is preferably 0.5 minutes to 30 minutes.
- the thickness of the sheet (b3) integrated through the above molding can be arbitrarily selected according to the shape of the target member, and is preferably 0.3 mm to 15 mm from the viewpoint of moldability and mechanical properties, and 1 mm to 12 mm. It is more preferable that
- the composite laminate of the present invention is obtained by laminating the film (a3) on one side or both sides of the sheet (b3) so that the film (a3) is disposed between the sheet (b3) and the mold. It can manufacture by integrating a film (a3) and a sheet (b3) by heating and pressurizing a laminated body with a molding machine. In addition, two or more (preferably 2 to 5) films (a3) may be laminated on one side or both sides of the sheet (b3). It is preferable to carry out a cooling step after the heating step. By cooling, the thermoplastic resin is solidified, which facilitates handling of the composite laminate.
- heating is carried out at 100.degree. C. to 400.degree. It is preferable, and heating at 150 ° C. to 350 ° C. is more preferable. Further, prior to the heating, preheating may be performed. For preheating, heating at a temperature of usually 150 ° C. to 400 ° C., preferably 200 ° C. to 380 ° C. is preferable.
- the pressure applied to the laminate in the above pressure application is preferably 0.1 MPa to 10 MPa, and more preferably 0.2 MPa to 2 MPa.
- the pressure is a value obtained by dividing the pressing force by the area of the laminate.
- the heating and pressurizing time is preferably 0.1 minutes to 30 minutes, and more preferably 0.5 minutes to 20 minutes.
- the cooling time to be provided after heating and pressurizing is preferably 0.5 minutes to 30 minutes.
- the mold temperature (Th) of the molding machine in the heating is preferably Tm ⁇ Th ⁇ (Tm + 100) (° C.), (Tm + 10) It is more preferable to set it as ⁇ Th ⁇ (Tm + 80) (° C.).
- the difference (Th-Tc) between the mold temperature (Th) of the molding machine and the mold temperature (Tc) of the molding machine at the time of cooling the laminate is 10 ⁇ (Th ⁇ Tc) ⁇ 250 (° C.) Preferably, 30 ⁇ (Th ⁇ Tc) ⁇ 200 (° C.).
- the layer B generates sinks of the thermoplastic resin (b2) due to the size of the reinforcing fiber (b1), it forms the layer A containing the inorganic fiber (a1) on the surface It is thought that the surface smoothness is improved by micro-reinforcing between the reinforcing fibers (b1) and the inorganic fibers (a1) to fill the gaps.
- the presence of the inorganic fiber (a1) in the layer A improves the nucleating agent effect of the thermoplastic resin (a2) by the inorganic fiber (a1), and the adhesion between the inorganic fiber (a1) and the mold is low. It is considered that the releasability is improved by the improvement of the thermal rigidity. Further, it is considered that the adhesion between the inorganic fiber (a1) of the layer A and the reinforcing fiber (b1) of the layer B (tethering effect) improves the adhesion to the layer B of the layer A.
- the composite laminate of the present invention has an effect that burrs are less likely to be generated in a cut cross section after cutting by containing the inorganic fiber (a1) in the A layer. Furthermore, by containing the inorganic fiber (a1), particularly potassium titanate fiber, in the composite laminate, the coating adhesion to the composite laminate is improved by the presence of hydroxyl groups and the like on the surface of the inorganic fiber (a1).
- the composite laminate of the present invention can be formed into a composite laminate of an arbitrary shape by press molding such as stamping molding, the composite laminate of the present invention can be used in various parts of automobiles, electric / electronic devices, home appliances, aircraft, etc.
- the member can be mentioned as a preferable application.
- the composite laminate of the present invention is excellent in surface appearance (surface smoothness) and, for example, since the maximum height (Sz) of the surface of layer A is 50 ⁇ m or less, it can be suitably used for automobile members. In particular, it can be suitably used for automobile exteriors.
- the maximum height (Sz) can be measured in accordance with ISO 25178.
- Thermoplastic resin Polyamide 6 resin (trade name: Amilan CM 1017, manufactured by Toray Industries, Inc.) Polyamide MXD10 resin (trade name: LEXTER 8500, manufactured by Mitsubishi Gas Chemical Co., Ltd.) Thermoplastic polyimide resin (trade name: Saprim TO-65, manufactured by Mitsubishi Gas Chemical Co., Ltd.)
- Glass fiber (trade name: ECS 03T-289P / W, manufactured by Nippon Electric Glass Co., Ltd., average fiber length: 3 mm, average fiber diameter: 13 ⁇ m)
- Plate-like talc (trade name: TALC GH7, manufactured by Hayashi Kasei, average major axis: 5.8 ⁇ m, thickness: 0.1 ⁇ m)
- Examples 1 to 5 and Comparative Examples 1 to 5 It melt-kneaded using the twin-screw extruder in the compounding ratio shown in Table 1, and manufactured the pellet.
- the cylinder temperatures of the twin-screw extruder were 230 ° C. in Examples 1 and 2 and Comparative Examples 1 to 3 and 240 ° C. in Example 3 and 4 and Comparative Examples 4 and 5 and Example 5 and Comparative Example 5 was at 350 ° C.
- Comparative Example 1 to Comparative Example 3 at a cylinder temperature of 230 ° C.
- Example 3 Example 4 and Comparative Example 4 at a cylinder temperature of 240 ° C.
- Example 5 and Comparative Example 5 at a cylinder temperature of 350 ° C.
- the molten resin extruded from a T-die (width 150 mm, thickness 0.2 mm) was uniaxially stretched through a film take-up device so that the film had an intended thickness, to obtain a film (a3).
- the thickness of the film (a3) was 100 ⁇ m in Examples 1 to 5 and Comparative Examples 2 to 5 and 250 ⁇ m in Comparative Example 1.
- the thickness of the layer A of the obtained composite laminate was 65 ⁇ m, and the thickness of the layer B was 0.375 mm.
- the maximum height (Sz) of the surface of the obtained composite laminate was measured according to ISO 25178 using a laser microscope (trade name: VK-X250, manufactured by KEYENCE CORPORATION). . The results are shown in Table 2.
- a polyamide 6 resin was used as the film (a3) and carbon fibers (average fiber length 30 mm, average fiber diameter 7 ⁇ m)
- Two imide films (trade name: UPILEX 75S, Ube) so that the impregnated carbon fiber sheet (sheet thickness 10 mm, carbon fiber content 50 mass%) and the film (a3) / carbon fiber sheet
- the product is sandwiched by Kosan Co., Ltd., and pressed at a top plate temperature of 210 ° C., a preheating time of 1 minute, a pressure of 1 MPa, and a pressure application time of 1 minute with a press (made by Toyo Seiki Co., Ltd., trade name: Mini Test Press MP-WCH).
- the composite laminate was manufactured by pressing and peeling off the imide film after pressing.
- the thickness of the layer A of the obtained composite laminate was 58 ⁇ m, and the thickness of the layer B was 0.314 mm.
- the maximum height (Sz) of the surface of the obtained composite laminate was measured according to ISO 25178 using a laser microscope (trade name: VK-X250, manufactured by KEYENCE CORPORATION). . The results are shown in Table 2.
- the thickness of the layer A of the obtained composite laminate was 43 ⁇ m, and the thickness of the layer B was 0.542 mm.
- the maximum height (Sz) of the surface of the obtained composite laminate was measured according to ISO 25178 using a laser microscope (trade name: VK-X250, manufactured by KEYENCE CORPORATION). . The results are shown in Table 2.
- a top plate temperature of 220 ° C., a preheating time of 1 minute, a pressure of 2 MPa, and a pressing time of 1 minute were pressed using a press (manufactured by Toyo Seiki Co., Ltd., trade name: Mini Test Press MP-WCH).
- a press manufactured by Toyo Seiki Co., Ltd., trade name: Mini Test Press MP-WCH.
- the imide film was pulled up to 90 ° above the metal plate to peel the imide film from the metal plate.
- the composite laminate completely peeled off from the metal plate together with the imide film is " ⁇ "
- that in which part of the composite laminate remained on the metal plate is " ⁇ ”
- the composite laminate from the metal plate What peeled only the imide film without peeling was made into "x”.
- Table 2 The results are shown in Table 2.
- Example 5 On each of the films (a3) of Example 5 and Comparative Example 5 obtained above on a metal plate (steel material SS400), a film (a3), carbon fibers (average fiber length 30 mm, average fiber diameter 7 ⁇ m) A carbon fiber sheet impregnated with polyamide 6 resin (sheet thickness 10 mm, carbon fiber content 50 mass%), an imide film (trade name: UPILEX 75S, Ube Industries, Ltd.) are laminated in this order, and a press (made by Toyo Seiki Co., Ltd.) Product name: Mini Test Press MP-WCH) Pressed under conditions of top temperature 325 ° C., preheating time 1 minute, pressure 1 MPa, pressing time 1 minute.
- a press made by Toyo Seiki Co., Ltd.
- Example 1 The composite laminate was fixed, and the grip portion of the film (a3) was pulled by 20 mm / min upward of the surface of the composite laminate by 90 ° with an autograph.
- a film (a3) which did not peel off from the interface with the carbon fiber sheet was regarded as "o", and a film peeled off from the interface with the carbon fiber sheet was regarded as "x”.
- the results in Example 1 and Comparative Example 1 are shown in Table 3.
- the above composite laminate used for evaluation of the maximum height (Sz) manufactured using each of the films (a3) of Example 3 and Example 4 and Comparative Example 4 was 90 mm long ⁇ horizontally by the abrasive water jet apparatus. It cut in the shape of 50 mm (flat plate). The cutting conditions were a nozzle diameter of 0.76 mm, a water pressure of 400 MPa, a speed of 200 mm / min, a water amount of about 2.5 L / min, and an amount of abrasive used: garnet (stone) # 80 of 400 g / min.
- JIS test pieces (bending test pieces) were produced by the abrasive water jet apparatus in the above composite laminates used for evaluation of the maximum height (Sz) manufactured using each of the films (a3) of Example 3 and Comparative Example 4 It cut to the shape of.
- the cutting conditions were a nozzle diameter of 0.76 mm, a water pressure of 400 MPa, a speed of 200 mm / min, a water amount of about 2.5 L / min, and an amount of abrasive used: garnet (stone) # 80 of 400 g / min.
- the obtained bending test pieces were subjected to a three-point bending test with a distance between supporting points of 60 mm using Autograph AG-5000 (manufactured by Shimadzu Corporation) according to JIS K7171 to determine bending strength, bending elastic modulus and bending deflection. It was measured. The results are shown in Table 5. From the results of Table 5, the composite laminate of the present invention was excellent as a structural body by improving the mechanical properties by the attachment of the sheet containing the inorganic fiber to the surface of the carbon fiber sheet.
- the resulting flat plate was coated with a two-component acrylic urethane paint (Fujikura Kasei Co., Ltd., trade name: Recrack # 110) to a film thickness of 18 ⁇ m on the surface of the surface degreased with a solvent, and the coated surface Furthermore, clear coating was applied so that the film thickness would be 13 ⁇ m. After coating, a cut test was performed by a cutter, and the groove width of the cut portion is shown in Table 5.
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Abstract
Description
本発明の複合積層体を構成するA層は、平均繊維長が1μm~300μmである無機繊維(a1)と熱可塑性樹脂(a2)とを含む層であり、A層が後述するB層の片面又は両面に存在する。A層が、本複合積層体の表層、裏層、又は表裏層に存在することで、成形時の離型性および複合積層体表面の表面平滑性が優れる。
A層に使用する無機繊維(a1)は、繊維状粒子から構成される粉末であり、平均繊維長が1μm~300μmであり、好ましくは1μm~200μmであり、より好ましくは3μm~100μmであり、さらに好ましくは5μm~50μmである。
A層に使用する熱可塑性樹脂(a2)としては、フィルム化できる熱可塑性樹脂であれば特に限定はなないが、例えば、ポリプロピレン(PP)樹脂、ポリエチレン(PE)樹脂、環状ポリオレフィン(COP)樹脂、環状オレフィン・コポリマー(COC)樹脂等のポリオレフィン樹脂;ポリスチレン(PS)樹脂、シンジオタクチックポリスチレン(SPS)樹脂、耐衝撃性ポリスチレン(HIPS)樹脂、アクリロニトリル-ブチレン-スチレン共重合体(ABS)樹脂、メタクリル酸メチル/スチレン共重合体(MS)、メタクリル酸メチル/スチレン/ブタジエン共重合体(MBS)、スチレン/ブタジエン共重合体(SBR)、スチレン/イソプレン共重合体(SIR)、スチレン/イソプレン/ブタジエン共重合体(SIBR)、スチレン/ブタジエン/スチレン共重合体(SBS)、スチレン/イソプレン/スチレン共重合体(SIS)、スチレン/エチレン/ブチレン/スチレン共重合体(SEBS)、スチレン/エチレン/プロピレン/スチレン共重合体(SEPS)等のポリスチレン系樹脂;ポリ乳酸(PLA)樹脂、ポリエチレンテレフタレート(PET)樹脂、ポリブチレンテレフタレート(PBT)樹脂、ポリシクロヘキセレンジメチレンテレフタレート(PCT)樹脂等のポリエステル系樹脂;ポリアセタール(POM)樹脂;ポリカーボネート(PC)樹脂;ポリアミド6樹脂、ポリアミド66樹脂、ポリアミド11樹脂、ポリアミド12樹脂、ポリアミド46樹脂、ポリアミド6C樹脂、ポリアミド9C樹脂、ポリアミド6樹脂とポリアミド66樹脂の共重合体(ポリアミド6/66樹脂)、ポリアミド6樹脂とポリアミド12樹脂の共重合体(ポリアミド6/12樹脂)等の脂肪族ポリアミド(PA)樹脂;ポリアミドMXD6樹脂、ポリアミドMXD10樹脂、ポリアミド6T樹脂、ポリアミド9T樹脂、ポリアミド10T樹脂等の芳香環を有する構造単位と有さない構造単位からなる半芳香族ポリアミド(PA)樹脂;ポリフェニレンサルファイド(PPS)樹脂;ポリエーテルサルフォン(PES)樹脂;液晶ポリエステル(LCP)樹脂;ポリエーテルケトン(PEK)樹脂、ポリエーテルエーテルケトン(PEEK)樹脂、ポリエーテルケトンケトン(PEKK)樹脂、ポリエーテルエーテルケトンケトン(PEEKK)等のポリエーテル芳香族ケトン樹脂;ポリエーテルイミド(PEI)樹脂;ポリアミドイミド(PAI)樹脂;熱可塑性ポリイミド(TPI)樹脂;ポリフッ化ビニリデン(PVDF)、ポリフッ化ビニル(PVF)、エチレン/テトラフルオロエチレン共重合体(ETFE)等のフッ素系樹脂;等を例示することができる。これらのなかでもポリオレフィン樹脂、ポリスチレン系樹脂、ポリエステル系樹脂、脂肪族ポリアミド(PA)樹脂、半芳香族ポリアミド(PA)樹脂、ポリフェニレンサルファイド(PPS)樹脂、ポリエーテル芳香族ケトン樹脂、ポリエーテルイミド(PEI)樹脂および熱可塑性ポリイミド(TPI)樹脂よりなる群から選ばれる少なくとも1種であることが好ましい。
A層は、その好ましい物性を損なわない範囲において、その他添加剤を含有することができる。その他添加剤としては、アラミド繊維、ポリフェニレンベンズオキサゾール(PBO)繊維、ガラス繊維、炭素繊維、アルミナ繊維、ボロン繊維、炭化ケイ素繊維、炭酸カルシム、雲母、マイカ、セリサイト、イライト、タルク、カオリナイト、モンモリナイト、ベーマイト、スメクタイト、バーミキュライト、二酸化チタン、シリカ、チタン酸カリウム、チタン酸リチウムカリウム、ベーマイト、ガラスビーズ、アルミナ等の上述の無機繊維(a1)以外の無機充填材;ポリテトラフルオロエチレン(PTFE)、低密度ポリエチレン、直鎖状低密度ポリエチレン、中密度ポリエチレン、高密度ポリエチレン、超高分子量ポリエチレン等のポリオレフィン樹脂、グラファイト、二硫化モリブテン、二硫化タングステン、窒化ホウ素等の固体潤滑剤;銅化合物等の熱安定剤;ヒンダードフェノール系光安定剤等の光安定剤;核形成剤;アニオン性帯電防止剤、カチオン性帯電防止剤、非イオン系帯電防止剤等の帯電防止剤;老化防止剤(酸化防止剤);耐候剤;耐光剤;金属不活性剤;ベンゾフェノン系紫外線吸収剤、ベンゾトリアゾール系紫外線吸収剤、トリアジン系紫外線吸収剤、サイリシレート系紫外線吸収剤等の紫外線吸収剤;防菌・防黴剤;防臭剤;炭素系導電剤、金属系導電剤、金属酸化物系導電剤、界面活性剤等の導電性付与剤;分散剤;ポリエステル系可塑剤、グリセリン系可塑剤、多価カルボン酸エステル系可塑剤、リン酸エステル系可塑剤、ポリアルキレングリコール系可塑剤、エポキシ系可塑剤等の軟化剤(可塑剤);カーボンブラック、酸化チタン等の顔料、染料等の着色剤;ホスファゼン系化合物、リン酸エステル、縮合リン酸エステル、無機リン系難燃剤、ハロゲン系難燃剤、シリコーン系難燃剤、金属酸化物系難燃剤、金属水酸化物系難燃剤、有機金属塩系難燃剤、窒素系難燃剤、ホウ素化合物系難燃剤等の難燃剤;ドリッピング防止剤;制振剤;中和剤;ブロッキング防止剤;流動性改良剤;脂肪酸、脂肪酸金属塩等の離型剤;滑剤;耐衝撃性改良剤;等が挙げられ、これらの1種又は2種以上を含有することができる。
本発明の複合積層体は後述する通り、A層を構成するフィルム(a3)と、B層を構成するシート(b3)を各々作製し、フィルム(a3)をシート(b3)の片面又は両面に積層配置して、得られた積層物を成形機により加熱及び加圧することでフィルム(a3)及びシート(b3)を一体化することにより得られる。
本発明の複合積層体を構成するB層は、平均繊維長が1mm以上である強化繊維(b1)と熱可塑性樹脂(b2)とを含む層であり、複合積層体のコア層である。強化繊維(b1)の平均繊維長を1mm以上とすることで、優れた力学物性の複合積層体を得ることができる。
B層に使用する強化繊維(b1)は、平均繊維長が1mm以上であれば特に限定されず、無機繊維、有機繊維、金属繊維、またはこれらの2種以上を組み合わせて使用できる。無機繊維としては、炭素繊維、黒鉛繊維、炭化珪素繊維、アルミナ繊維、タングステンカーバイド繊維、ボロン繊維、ガラス繊維などが挙げられる。有機繊維としては、アラミド繊維、ポリパラフェニレンベンズオキサゾール(PBO)繊維、高密度ポリエチレン繊維、その他一般のポリアミド繊維、ポリエステルなどが挙げられる。金属繊維としては、ステンレス、鉄等の繊維が挙げられ、また金属を被覆した炭素繊維でもよい。これらのなかでも炭素繊維、ガラス繊維およびアラミド繊維よりなる群から選ばれる少なくとも1種であることが好ましい。最終成形物の強度等の力学特性をより一層向上させる観点から、炭素繊維が更に好ましい。炭素繊維の種類としては、例えば、ピッチ系炭素繊維、PAN系炭素繊維等が挙げられる。
B層に使用する熱可塑性樹脂(b2)としては、プリプレグのバインダー樹脂として使用される熱可塑性樹脂であれば特に限定はなく、例えば、ポリプロピレン(PP)樹脂、ポリエチレン(PE)樹脂、環状ポリオレフィン(COP)樹脂、環状オレフィン・コポリマー(COC)樹脂等のポリオレフィン樹脂;ポリスチレン(PS)樹脂、シンジオタクチックポリスチレン(SPS)樹脂、耐衝撃性ポリスチレン(HIPS)樹脂、アクリロニトリル-ブチレン-スチレン共重合体(ABS)樹脂、メタクリル酸メチル/スチレン共重合体(MS)、メタクリル酸メチル/スチレン/ブタジエン共重合体(MBS)、スチレン/ブタジエン共重合体(SBR)、スチレン/イソプレン共重合体(SIR)、スチレン/イソプレン/ブタジエン共重合体(SIBR)、スチレン/ブタジエン/スチレン共重合体(SBS)、スチレン/イソプレン/スチレン共重合体(SIS)、スチレン/エチレン/ブチレン/スチレン共重合体(SEBS)、スチレン/エチレン/プロピレン/スチレン共重合体(SEPS)等のポリスチレン系樹脂;ポリ乳酸(PLA)樹脂、ポリエチレンテレフタレート(PET)樹脂、ポリブチレンテレフタレート(PBT)樹脂、ポリシクロヘキセレンジメチレンテレフタレート(PCT)樹脂等のポリエステル系樹脂;ポリアセタール(POM)樹脂;ポリカーボネート(PC)樹脂;ポリアミド6樹脂、ポリアミド66樹脂、ポリアミド11樹脂、ポリアミド12樹脂、ポリアミド46樹脂、ポリアミド6C樹脂、ポリアミド9C樹脂、ポリアミド6樹脂とポリアミド66樹脂の共重合体(ポリアミド6/66樹脂)、ポリアミド6樹脂とポリアミド12樹脂の共重合体(ポリアミド6/12樹脂)等の脂肪族ポリアミド(PA)樹脂;ポリアミドMXD6樹脂、ポリアミドMXD10樹脂、ポリアミド6T樹脂、ポリアミド9T樹脂、ポリアミド10T樹脂等の芳香環を有する構造単位と有さない構造単位からなる半芳香族ポリアミド(PA)樹脂;ポリフェニレンサルファイド(PPS)樹脂;ポリエーテルサルフォン(PES)樹脂;液晶ポリエステル(LCP)樹脂;ポリエーテルケトン(PEK)樹脂、ポリエーテルエーテルケトン(PEEK)樹脂、ポリエーテルケトンケトン(PEKK)樹脂、ポリエーテルエーテルケトンケトン(PEEKK)等のポリエーテル芳香族ケトン樹脂;ポリエーテルイミド(PEI)樹脂;ポリアミドイミド(PAI)樹脂;熱可塑性ポリイミド(TPI)樹脂;ポリフッ化ビニリデン(PVDF)、ポリフッ化ビニル(PVF)、エチレン/テトラフルオロエチレン共重合体(ETFE)等のフッ素系樹脂;等を例示することができる。これらのなかでもポリオレフィン樹脂、ポリスチレン系樹脂、ポリエステル系樹脂、脂肪族ポリアミド(PA)樹脂、半芳香族ポリアミド(PA)樹脂、ポリエーテル芳香族ケトン樹脂、ポリエーテルイミド(PEI)樹脂および熱可塑性ポリイミド(TPI)樹脂よりなる群から選ばれる少なくとも1種であることが好ましい。
本発明の複合積層体は、A層を構成するフィルム(a3)と、B層を構成するシート(b3)を各々作製し、フィルム(a3)をシート(b3)の片面又は両面に積層配置して、得られた積層物を成形機により加熱及び加圧することでフィルム(a3)及びシート(b3)を一体化することにより得られる。
本発明の複合積層体は、フィルム(a3)がシート(b3)と金型の間に配置されるように、フィルム(a3)をシート(b3)の片面又は両面に積層配置して、得られた積層物を成形機により加熱及び加圧することでフィルム(a3)及びシート(b3)を一体化することにより製造することができる。また、2枚以上(好ましくは2枚~5枚)のフィルム(a3)を、シート(b3)の片面又は両面に積層配置してもよい。加熱工程の後に、冷却工程を実施することが好ましい。冷却を行なうことにより、熱可塑性樹脂が固化するので複合積層体の取り扱いが容易となる。
ポリアミド6樹脂(商品名:アミランCM1017、東レ社製)
ポリアミドMXD10樹脂(商品名:LEXTER8500、三菱瓦斯化学社製)
熱可塑性ポリイミド樹脂(商品名:サープリムTO-65、三菱瓦斯化学社製)
チタン酸カリウム(商品名:TISMO D101、大塚化学社製、平均繊維長:15μm、平均繊維径:0.5μm、平均アスペクト比:30)
ワラストナイト(商品名:バイスタルW、大塚化学社製、平均繊維長:25μm、平均繊維径:3μm、平均アスペクト比:8)
ガラス繊維(商品名:ECS 03T-289P/W、日本電気硝子社製、平均繊維長:3mm、平均繊維径:13μm)
板状タルク(商品名:TALC GH7、林化成社製、平均長径:5.8μm、厚み:0.1μm)
表1に示す配合割合で、二軸押出機を用いて溶融混練し、ペレットを製造した。なお、二軸押出機のシリンダ温度は、実施例1~実施例2および比較例1~比較例3が230℃、実施例3、実施例4および比較例4が240℃、実施例5および比較例5が350℃であった。
上記で得られた実施例1、実施例2および比較例1~比較例3のフィルム(a3)の其々について、フィルム(a3)と、炭素繊維(平均繊維長30mm、平均繊維径7μm)にポリアミド6樹脂を含浸した炭素繊維シート(シートの厚み10mm、炭素繊維含有量50質量%)とを、フィルム(a3)/炭素繊維シートの構成になるように、2枚のイミドフィルム(商品名:UPILEX 75S、宇部興産社製)に挟み込み、プレス機(東洋精機社製、商品名:Mini Test Press MP-WCH)にて天板温度220℃、予熱時間1分、圧力2MPa、加圧時間1分の条件にてプレスし、プレス後にイミドフィルムを剥離することで複合積層体を製造した。得られた複合積層体のA層の厚みは65μm、B層の厚みは0.375mmであった。得られた複合積層体の表面(A層側)を、ISO 25178に準拠し、レーザー顕微鏡(キーエンス社製、商品名:VK-X250)を用いて、表面の最大高さ(Sz)を測定した。結果を表2に示した。
上記で得られた実施例5および比較例5のフィルム(a3)の其々について、フィルム(a3)と、炭素繊維(平均繊維長30mm、平均繊維径7μm)にポリアミド6樹脂を含浸した炭素繊維シート(シートの厚み10mm、炭素繊維含有量50質量%)とを、フィルム(a3)/炭素繊維シートの構成になるように、2枚のイミドフィルム(商品名:UPILEX 75S、宇部興産社製)に挟み込み、プレス機(東洋精機社製、商品名:Mini Test Press MP-WCH)にて天板温度325℃、予熱時間1分、圧力1MPa、加圧時間1分の条件にてプレスし、プレス後にイミドフィルムを剥離することで複合積層体を製造した。得られた複合積層体のA層の厚みは43μm、B層の厚みは0.542mmであった。得られた複合積層体の表面(A層側)を、ISO 25178に準拠し、レーザー顕微鏡(キーエンス社製、商品名:VK-X250)を用いて、表面の最大高さ(Sz)を測定した。結果を表2に示した。
金属板(鋼材 SS400)上に、上記で得られた実施例1、実施例2および比較例1~比較例3のフィルム(a3)の其々について、フィルム(a3)、炭素繊維(平均繊維長30mm、平均繊維径7μm)にポリアミド6樹脂を含浸した炭素繊維シート(シートの厚み10mm、炭素繊維含有量50質量%)、イミドフィルム(商品名:UPILEX 75S、宇部興産社製)の順に積層し、プレス機(東洋精機社製、商品名:Mini Test Press MP-WCH)にて天板温度220℃、予熱時間1分、圧力2MPa、加圧時間1分の条件にてプレスした。プレス後、イミドフィルムを金属板の90°上方へ引き上げてイミドフィルムを金属板から剥離した。イミドフィルム剥離時に、イミドフィルムとともに金属板から複合積層体が完全に剥離したものを「○」、複合積層体の一部が金属板に残存したものを「△」、複合積層体が金属板から剥離せずにイミドフィルムのみが剥離したものを「×」とした。結果を表2に示した。
上記で得られた実施例1および比較例1のフィルム(a3)の其々について、フィルム(a3)と、炭素繊維(平均繊維長30mm、平均繊維径7μm)にポリアミド6樹脂を含浸した炭素繊維シート(シートの厚み10mm、炭素繊維含有量50質量%)とを、フィルム(a3)/炭素繊維シートの構成になるように、2枚のイミドフィルム(商品名:UPILEX 75S、宇部興産社製)に挟み込み、プレス機(東洋精機社製、商品名:Mini Test Press MP-WCH)にて天板温度220℃、予熱時間1分、圧力2MPa、加圧時間1分の条件にてプレスし、プレス後にイミドフィルムを剥離することで複合積層体を製造した。なお、複合積層体の一端に、上記フィルム(a3)の掴みしろ部を設けた。
実施例3、実施例4および比較例4のフィルム(a3)の其々を用いて製造した、最大高さ(Sz)の評価に用いた上記複合積層体をアブレシブウォータージェット装置により縦90mm×横50mm(平板)の形状に切削した。切削条件は、ノズル径φ0.76mm、水圧400MPa、速度200mm/min、水量約2.5L/min、研磨剤使用量:garnet(石榴石)#80を400g/minとした。
実施例3および比較例4のフィルム(a3)の其々を用いて製造した、最大高さ(Sz)の評価に用いた上記複合積層体においてアブレシブウォータージェット装置によりJIS試験片(曲げ試験片)の形状に切削した。切削条件は、ノズル径φ0.76mm、水圧400MPa、速度200mm/min、水量約2.5L/min、研磨剤使用量:garnet(石榴石)#80を400g/minとした。
表5の結果より、本発明の複合積層体は炭素繊維シート表面に無機繊維を含むシートの貼り付けにより機械的物性が向上し、構造体として優れていた。
実施例3および比較例4のフィルム(a3)の其々を用いて製造した、最大高さ(Sz)の評価に用いた上記複合積層体においてアブレシブウォータージェット装置により縦90mm×横50mm(平板)の形状に切削した。切削条件は、ノズル径φ0.76mm、水圧400MPa、速度200mm/min、水量約2.5L/min、研磨剤使用量:garnet(石榴石)#80を400g/minとした。
2…A層
3…B層
3a…第1の主面
3b…第2の主面
Claims (14)
- A層とB層とを備え、前記B層の片面又は両面に前記A層が設けられている複合積層体であり、前記A層が、平均繊維長が1μm~300μmである無機繊維(a1)と熱可塑性樹脂(a2)とを含み、前記B層が、平均繊維長が1mm以上である強化繊維(b1)と熱可塑性樹脂(b2)とを含む、複合積層体。
- 前記無機繊維(a1)の平均アスペクト比が、3~200である、請求項1に記載の複合積層体。
- 前記無機繊維(a1)が、チタン酸カリウムおよびワラストナイトよりなる群から選ばれる少なくとも1種である、請求項1または請求項2に記載の複合積層体。
- 前記無機繊維(a1)の含有量が、前記A層に含まれる成分の全量100質量%中において1質量%~40質量%である、請求項1~請求項3のいずれか一項に記載の複合積層体。
- 前記強化繊維(b1)が、炭素繊維、ガラス繊維およびアラミド繊維よりなる群から選ばれる少なくとも1種である、請求項1~請求項4のいずれか一項に記載の複合積層体。
- 前記強化繊維(b1)の平均繊維径が、1μm~50μmである、請求項1~請求項5のいずれか一項に記載の複合積層体。
- 前記強化繊維(b1)の含有量が、前記B層に含まれる成分の全量100質量%中において10質量%~80質量%である、請求項1~請求項6のいずれか一項に記載の複合積層体。
- 前記熱可塑性樹脂(a2)が、ポリオレフィン樹脂、ポリスチレン系樹脂、ポリエステル系樹脂、脂肪族ポリアミド(PA)樹脂、半芳香族ポリアミド(PA)樹脂、ポリフェニレンサルファイド(PPS)樹脂、ポリエーテル芳香族ケトン樹脂、ポリエーテルイミド(PEI)樹脂および熱可塑性ポリイミド(TPI)樹脂よりなる群から選ばれる少なくとも1種である、請求項1~請求項7のいずれか一項に記載の複合積層体。
- 前記熱可塑性樹脂(b2)が、ポリオレフィン樹、ポリスチレン系樹脂、ポリエステル系樹脂、脂肪族ポリアミド(PA)樹脂、半芳香族ポリアミド(PA)樹脂、ポリフェニレンサルファイド(PPS)樹脂、ポリエーテル芳香族ケトン樹脂、ポリエーテルイミド(PEI)樹脂および熱可塑性ポリイミド(TPI)樹脂よりなる群から選ばれる少なくとも1種である、請求項1~請求項8のいずれか一項に記載の複合積層体。
- 前記A層における表面の最大高さ(Sz)が50μm以下である、請求項1~請求項9のいずれか一項に記載の複合積層体。
- 自動車部材用である、請求項1~請求項10のいずれか一項に記載の複合積層体。
- 請求項1~請求項11のいずれか1項に記載の複合積層体の製造方法であって、平均繊維長が1mm以上である強化繊維(b1)と熱可塑性樹脂(b2)とを含むシート(b3)の片面または両面に、平均繊維長が1μm~300μmである無機繊維(a1)と熱可塑性樹脂(a2)とを含むフィルム(a3)を積層配置し、前記積層物を加熱及び加圧することでシート(b3)及びフィルム(a3)を一体化する、複合積層体の製造方法。
- 前記フィルム(a3)の厚みが500μm未満である、請求項12に記載の複合積層体の製造方法。
- 前記シート(b3)の厚みが0.3mm~15mmである、請求項12または請求項13に記載の複合積層体の製造方法。
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