WO2020071495A1 - 耐ボールベアリング摺動摩耗部材用液晶性樹脂組成物及びそれを用いた耐ボールベアリング摺動摩耗部材 - Google Patents
耐ボールベアリング摺動摩耗部材用液晶性樹脂組成物及びそれを用いた耐ボールベアリング摺動摩耗部材Info
- Publication number
- WO2020071495A1 WO2020071495A1 PCT/JP2019/039166 JP2019039166W WO2020071495A1 WO 2020071495 A1 WO2020071495 A1 WO 2020071495A1 JP 2019039166 W JP2019039166 W JP 2019039166W WO 2020071495 A1 WO2020071495 A1 WO 2020071495A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ball bearing
- mass
- liquid crystalline
- resin composition
- crystalline resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 0 OC(c1ccc(*c(cc2)ccc2C(O)=O)cc1)=O Chemical compound OC(c1ccc(*c(cc2)ccc2C(O)=O)cc1)=O 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L101/00—Compositions of unspecified macromolecular compounds
- C08L101/12—Compositions of unspecified macromolecular compounds characterised by physical features, e.g. anisotropy, viscosity or electrical conductivity
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/12—Polyester-amides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/62—Selection of substances
Definitions
- the present invention relates to a liquid crystal resin composition for ball bearing sliding and wear resistant members and a ball bearing sliding and wear resistant member using the same.
- Liquid crystalline resins represented by liquid crystalline polyester resins have excellent mechanical strength, heat resistance, chemical resistance, electrical properties, etc. in a well-balanced manner, and also have excellent dimensional stability, so they are widely used as high-performance engineering plastics. It's being used. Recently, liquid crystal resins have been used for precision equipment parts by taking advantage of these features.
- Patent Literature 1 aims to provide a molded article made of a liquid crystalline resin composition having excellent surface appearance and excellent slidability, and aims to provide a liquid crystalline resin and talc having a specific volume average particle diameter. Is disclosed in a specific ratio.
- Patent Document 2 describes a camera module component used in a form in which it is in dynamic contact with a ball bearing.
- the conventional liquid crystalline resin composition does not sufficiently reduce the ball bearing sliding wear.
- the present invention has been made in order to solve the above-mentioned problems, and its object is to provide a good balance of surface whitening suppression, low warpage, weld strength, and low dust generation, and ball bearing sliding wear. It is an object of the present invention to provide a liquid crystal resin composition for a ball-bearing sliding wear member used for producing a ball-bearing sliding-wear member having reduced resistance, and a ball bearing sliding-wear member using the same.
- the present inventors have conducted intensive studies to solve the above-mentioned problems. As a result, it contains a liquid crystalline resin, a granular filler having a specific median diameter and a plate-like filler, and the content of each of the granular filler, the plate-like filler, and the sum of these is within a predetermined range. It has been found that the above problem can be solved by using a liquid crystal resin composition, and the present invention has been completed. More specifically, the present invention provides the following.
- the content of the (B) particulate filler is 7.5 to 22.5% by mass
- the content of the (C) plate-like filler is 2.5 to 27.5% by mass
- a liquid crystal resin composition for a ball-bearing sliding wear member wherein the total content of the (B) granular filler and the (C) plate-like filler is 22.5 to 37.5% by mass.
- composition according to (1) wherein the (B) granular filler is silica, and the (C) plate-like filler is talc.
- composition according to (1) or (2) further comprising (D) an epoxy group-containing copolymer, wherein the content of the (D) epoxy group-containing copolymer is from 1 to 5 A composition which is% by weight.
- a ball bearing-resistant sliding wear member comprising the composition according to any one of (1) to (3).
- a ball bearing sliding wear member is manufactured using the liquid crystalline resin composition for a ball bearing sliding wear member of the present invention as a raw material, the balance between surface whitening suppression, low warpage, weld strength, and low dust generation can be achieved. It is possible to obtain a ball bearing sliding wear member that is excellent and excellent in ball bearing sliding wear resistance.
- FIG. 1 is a diagram for explaining a method of evaluating the amount of sliding wear.
- FIG. 2A is a diagram showing a camera module type molded product used for warpage deformation evaluation
- FIG. 2B is a diagram showing measurement points in the warpage deformation evaluation.
- the unit of the numerical value in the figure is mm.
- FIG. 3 is a diagram showing a molded product used in the evaluation of weld strength. The unit of the numerical value in the figure is mm.
- the liquid crystalline resin composition for a ball bearing sliding wear member of the present invention contains (A) a liquid crystalline resin, (B) a particulate filler, and (C) a plate-like filler.
- the liquid crystalline resin (A) used in the present invention refers to a melt-processable polymer having a property capable of forming an optically anisotropic molten phase.
- the properties of the anisotropic molten phase can be confirmed by a conventional polarization inspection method using an orthogonal polarizer. More specifically, the anisotropic molten phase can be confirmed by using a Leitz polarizing microscope and observing the molten sample placed on the Leitz hot stage at a magnification of 40 times under a nitrogen atmosphere.
- the liquid crystalline polymer applicable to the present invention is inspected between orthogonal polarizers, polarized light is normally transmitted even when it is in a molten stationary state, and exhibits optical anisotropy.
- the type of the liquid crystalline resin (A) is not particularly limited, and is preferably an aromatic polyester and / or an aromatic polyesteramide. Further, a polyester partially containing an aromatic polyester and / or an aromatic polyesteramide in the same molecular chain is also included in the range.
- the liquid crystalline resin is preferably at least about 2.0 dl / g, more preferably 2.0 to 10.0 dl / g, when dissolved in pentafluorophenol at a concentration of 0.1% by mass at 60 ° C. Those having a logarithmic viscosity (IV) are preferably used.
- the aromatic polyester or aromatic polyester amide (A) as the liquid crystalline resin applicable to the present invention is particularly preferably at least one selected from the group consisting of aromatic hydroxycarboxylic acids, aromatic hydroxyamines, and aromatic diamines.
- a polyester amide comprising: a repeating unit derived from at least one species; and (c) a repeating unit derived from one or more of aromatic dicarboxylic acids, alicyclic dicarboxylic acids, and derivatives thereof; (5) a repeating unit mainly derived from (a) one or more aromatic hydroxycarboxylic acids and derivatives thereof; and (b) one or two aromatic hydroxyamines, aromatic diamines and derivatives thereof.
- a polyester amide comprising a repeating unit derived from at least one kind or two or more kinds of aliphatic diols, aliphatic diols, and derivatives thereof. Further, a molecular weight modifier may be used in combination with the above constituents as necessary.
- a specific compound constituting the liquid crystal resin applicable to the present invention include aromatic hydroxycarboxylic acids such as p-hydroxybenzoic acid and 6-hydroxy-2-naphthoic acid; 2,6-dihydroxy Aromatic diols such as naphthalene, 1,4-dihydroxynaphthalene, 4,4'-dihydroxybiphenyl, hydroquinone, resorcinol, a compound represented by the following general formula (I), and a compound represented by the following general formula (II)
- Aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid, 4,4′-diphenyldicarboxylic acid, 2,6-naphthalenedicarboxylic acid, and compounds represented by the following general formula (III): p-aminophenol, p-aminophenol And aromatic amines such as phenylenediamine.
- X a group selected from alkylene (C 1 -C 4 ), alkylidene, —O—, —SO—, —SO 2 —, —S—, and —CO—
- the liquid crystalline resin (A) used in the present invention can be prepared from the monomer compound (or a mixture of monomers) by a known method using a direct polymerization method or a transesterification method, and is usually a melt polymerization method.
- a solution polymerization method, a slurry polymerization method, a solid phase polymerization method, or a combination of two or more of them, and a melt polymerization method or a combination of a melt polymerization method and a solid phase polymerization method is preferably used.
- the above-mentioned compounds having an ester-forming ability may be used as they are in the polymerization, or may be those obtained by modifying a precursor to a derivative having the ester-forming ability in a stage prior to the polymerization.
- various catalysts can be used. Representative examples include potassium acetate, magnesium acetate, stannous acetate, tetrabutyl titanate, lead acetate, sodium acetate, antimony trioxide, tris (2 (4, pentanedionato) cobalt (III) and the like, and organic compound catalysts such as N-methylimidazole and 4-dimethylaminopyridine.
- the amount of the catalyst used is generally about 0.001 to 1% by weight, particularly preferably about 0.01 to 0.2% by weight, based on the total weight of the monomers. If necessary, the molecular weight of the polymer produced by these polymerization methods can be increased by a solid-phase polymerization method in which heating is performed under reduced pressure or in an inert gas.
- the melt viscosity of (A) the liquid crystalline resin obtained by the above method is not particularly limited. Generally, those having a melt viscosity at a molding temperature of 3 Pa ⁇ s or more and 500 Pa ⁇ s or less at a shear rate of 1000 sec ⁇ 1 can be used. However, a material having a very high viscosity is not preferable because the fluidity is extremely deteriorated.
- the liquid crystal resin (A) may be a mixture of two or more liquid crystal resins.
- the content of the liquid crystal resin (A) is preferably 62.5 to 77.5% by mass or 61.5 to 72.5% by mass, more preferably 65 to 72.5% by mass. 75% by mass or 63.5 to 72.5% by mass. It is preferable that the content of the component (A) is within the above range in terms of fluidity, heat resistance, and the like.
- the component (B) is a granular filler, and the component (B) has a median diameter of 1.3 to 5.0 ⁇ m.
- the median diameter is preferably 1.5 to 5.0 ⁇ m, and more preferably 1.5 to 4.0 ⁇ m.
- the median diameter refers to a median value on a volume basis measured by a laser diffraction / scattering particle size distribution measuring method.
- Examples of the particulate filler of the component (B) include silicates such as silica, quartz powder, glass beads, glass powder, calcium silicate, aluminum silicate, kaolin, clay, diatomaceous earth, and wollastonite; Metal oxides such as titanium oxide, zinc oxide and alumina; metal carbonates such as calcium carbonate and magnesium carbonate; metal sulfates such as calcium sulfate and barium sulfate; silicon carbide; silicon nitride; As the component (B), one type may be used alone, or two or more types may be used in combination. In the present invention, it is more preferable to use silica as the component (B) from the viewpoints of suppression of surface whitening of the molded article, low dust generation of the molded article, and weld strength of the molded article.
- silicates such as silica, quartz powder, glass beads, glass powder, calcium silicate, aluminum silicate, kaolin, clay, diatomaceous earth, and wollastonite
- Metal oxides
- the content of the component (B) is 7.5 to 22.5% by mass in the liquid crystal composition of the present invention.
- the content of the component (B) is 7.5% by mass or more, it is easy to obtain a molded product with reduced ball bearing sliding wear, and when it is 22.5% by mass or less, the surface whitening of the molded product is suppressed. The effect tends to be high.
- the preferred content of the component (B) is 10 to 20% by mass.
- the liquid crystalline resin composition according to the present invention contains a plate-like filler.
- the platy filler can be used alone or in combination of two or more.
- the content of the (C) plate-like filler is 2.5 to 27.5% by mass.
- the content of the component (C) is 2.5% by mass or more, the molded product tends to have low warpage.
- the content of the component (C) is 27.5% by mass or less, the effect of suppressing surface whitening of the molded article and the low dust generation property of the molded article are likely to be increased.
- the content of the component (C) is preferably 5 to 25% by mass.
- Examples of the plate-like filler in the present invention include talc, mica, glass flake, various metal foils, and the like.
- Talc is preferred from the viewpoint of suppressing warpage of a molded article obtained from the liquid crystal resin composition without deteriorating the fluidity of the liquid crystal resin composition.
- the median diameter of the platy filler is not particularly limited, and a smaller one is desirable in consideration of the fluidity of the liquid crystalline resin composition.
- the thickness is preferably 1 to 100 ⁇ m, more preferably 5 to 50 ⁇ m.
- the total content of Fe 2 O 3 , Al 2 O 3, and CaO is 2.5% by mass or less based on the total solid content of the talc, and Fe 2 O 3 and Al
- the total content of 2 O 3 is more than 1.0% by mass and 2.0% by mass or less
- the content of CaO is less than 0.5% by mass. That is, talc that can be used in the present invention contains at least one of Fe 2 O 3 , Al 2 O 3, and CaO, in addition to SiO 2 and MgO, which are the main components, and each component has the above content range. May be contained.
- the total content of Fe 2 O 3 , Al 2 O 3, and CaO is 2.5% by mass or less, the moldability of the liquid crystal resin composition and the molding from the liquid crystal resin composition.
- the heat resistance of molded articles such as connectors is not easily deteriorated. Therefore, the total content of Fe 2 O 3 , Al 2 O 3 and CaO is preferably from 1.0% by mass to 2.0% by mass.
- talc having a total content of Fe 2 O 3 and Al 2 O 3 of more than 1.0% by mass is easily available.
- the total content of Fe 2 O 3 and Al 2 O 3 is 2.0% by mass or less, moldability of the liquid crystalline resin composition and molding from the liquid crystalline resin composition are performed.
- the heat resistance of molded articles such as connectors is not easily deteriorated. Therefore, the total content of Fe 2 O 3 and Al 2 O 3 is preferably more than 1.0% by mass and 1.7% by mass or less.
- the content of CaO is preferably from 0.01% by mass to 0.4% by mass.
- the talc median diameter in the present invention is preferably from 4.0 to 20.0 ⁇ m, and more preferably from 10 to 18 ⁇ m, from the viewpoint of preventing warpage of the molded article and maintaining the fluidity of the liquid crystalline resin composition. Is more preferred.
- the total content of the component (B) and the component (C) is 22.5 to 37.5% by mass, and preferably 25 to 35% by mass in the liquid crystalline resin composition of the present invention. .
- the total content is 22.5% by mass or more, the molded product tends to have low warpage.
- the total content is 37.5% by mass or less, the effect of suppressing surface whitening of the molded article and the low dust generation property of the molded article are likely to be increased.
- the liquid crystalline composition of the present invention may contain (D) an epoxy group-containing copolymer.
- the epoxy group-containing copolymer can be used alone or in combination of two or more.
- the (D) epoxy group-containing copolymer is not particularly limited. For example, at least one selected from the group consisting of (D1) an epoxy group-containing olefin-based copolymer and (D2) an epoxy group-containing styrene-based copolymer. One type is mentioned.
- the epoxy group-containing copolymer contributes to reducing the ball bearing sliding wear of the molded product obtained from the liquid crystalline resin composition of the present invention.
- Examples of the epoxy group-containing olefin copolymer include a copolymer composed of a repeating unit derived from an ⁇ -olefin and a repeating unit derived from a glycidyl ester of an ⁇ , ⁇ -unsaturated acid.
- the ⁇ -olefin is not particularly limited, and includes, for example, ethylene, propylene, and butene. Among them, ethylene is preferably used.
- the glycidyl ester of an ⁇ , ⁇ -unsaturated acid is represented by the following general formula (IV).
- the glycidyl ester of an ⁇ , ⁇ -unsaturated acid is, for example, glycidyl acrylate, glycidyl methacrylate, glycidyl ethacrylate, glycidyl itaconate, and particularly preferably glycidyl methacrylate.
- the content of the repeating unit derived from ⁇ -olefin is 87 to 98% by mass, and the content of the repeating unit derived from glycidyl ester of ⁇ , ⁇ -unsaturated acid is contained.
- the amount is preferably from 13 to 2% by weight.
- the epoxy group-containing olefin copolymer (D1) used in the present invention may be acrylonitrile, acrylic acid ester, methacrylic acid ester, ⁇ -methylstyrene, maleic anhydride as a third component in addition to the above two components within a range not to impair the present invention.
- a repeating unit derived from one or more olefinically unsaturated esters such as an acid may be contained in an amount of 0 to 48 parts by mass based on 100 parts by mass of the above two components.
- the epoxy group-containing olefin copolymer as the component (D1) of the present invention can be easily prepared by a usual radical polymerization method using a monomer and a radical polymerization catalyst corresponding to each component. More specifically, usually, an ⁇ -olefin and a glycidyl ester of an ⁇ , ⁇ -unsaturated acid are reacted at 500 to 4000 atm and 100 to 300 ° C. in the presence of a radical generator in the presence of an appropriate solvent or chain transfer agent. It can be produced by a method of copolymerizing under or in the absence. Further, it can also be produced by a method in which an ⁇ -olefin, a glycidyl ester of an ⁇ , ⁇ -unsaturated acid and a radical generator are mixed and melt-grafted in an extruder.
- Examples of the epoxy group-containing styrene-based copolymer (D2) include a copolymer composed of a repeating unit derived from styrenes and a repeating unit derived from a glycidyl ester of an ⁇ , ⁇ -unsaturated acid.
- a copolymer composed of a repeating unit derived from styrenes and a repeating unit derived from a glycidyl ester of an ⁇ , ⁇ -unsaturated acid can be The glycidyl ester of an ⁇ , ⁇ -unsaturated acid is the same as that described for the component (D1), and thus the description is omitted.
- Styrenes include styrene, ⁇ -methylstyrene, brominated styrene, divinylbenzene and the like, and styrene is preferably used.
- the (D2) epoxy group-containing styrenic copolymer used in the present invention is a multicomponent copolymer containing, as a third component, a repeating unit derived from one or more other vinyl monomers in addition to the above two components. There may be. Preferred as the third component are repeating units derived from one or more olefinic unsaturated esters such as acrylonitrile, acrylates, methacrylates, and maleic anhydride. An epoxy group-containing styrenic copolymer containing these repeating units in an amount of 40% by mass or less in the copolymer is preferable as the component (D2).
- the content of the repeating unit derived from the glycidyl ester of ⁇ , ⁇ -unsaturated acid is 2 to 20% by mass
- the content of the repeating unit derived from styrenes is Is preferably from 80 to 98% by mass.
- the epoxy group-containing styrenic copolymer can be prepared by a usual radical polymerization method using a monomer corresponding to each component and a radical polymerization catalyst. More specifically, styrenes and a glycidyl ester of an ⁇ , ⁇ -unsaturated acid are usually combined with a glycidyl ester of an ⁇ , ⁇ -unsaturated acid at 500 to 4000 atm and 100 to 300 ° C. in the presence of a suitable solvent or chain transfer agent. Alternatively, it can be produced by a method of copolymerizing in the absence.
- the epoxy group-containing olefin copolymer (D1) is preferable in terms of heat resistance.
- the proportion of these components can be appropriately selected according to the required characteristics.
- the content of the epoxy group-containing copolymer in the liquid crystal resin composition of the present invention may be, for example, 0 to 5% by mass, and preferably 1 to 5% by mass.
- the content of the component (D) is within the above range, it is easy to obtain a molded article having reduced ball bearing sliding wear without impairing the fluidity of the liquid crystalline resin composition. More preferably, the content is 1.5 to 2.5% by mass.
- the (E) carbon black used as an optional component in the present invention is not particularly limited as long as it is a commonly available one used for coloring a resin.
- (E) carbon black contains a lump formed by agglomeration of primary particles, but the resin composition of the present invention is molded unless a lump of a size of 50 ⁇ m or more is remarkably contained.
- Many bumps fine bumps-like projections (fine unevenness) in which carbon black is aggregated) are unlikely to be generated on the surface of the formed article.
- the preferred content is 5 ppm or less.
- the compounding amount of carbon black in the liquid crystal resin composition may be, for example, 0 to 5% by mass, and is preferably in the range of 0.5 to 5% by mass.
- the blending amount of carbon black is 0.5% by mass or more, the jet-blackness of the obtained resin composition is hardly reduced, and the light-shielding property is less likely to be uneasy.
- the blending amount of carbon black is 5% by mass or less, it is difficult to be uneconomical, and hardly occurs.
- the release agent (F) used as an optional component in the present invention is not particularly limited as long as it is generally available, and examples thereof include fatty acid esters, fatty acid metal salts, fatty acid amides, Examples thereof include a molecular weight polyolefin, and a fatty acid ester of pentaerythritol (for example, pentaerythritol tetrastearate) is preferable.
- the compounding amount of the release agent in the liquid crystalline resin composition may be, for example, 0 to 3% by mass, and preferably 0.1 to 3% by mass.
- the compounding amount of the release agent is 0.1% by mass or more, the releasability at the time of molding is improved, and a molded body with reduced ball bearing sliding wear is easily obtained.
- the amount of the release agent is 3% by mass or less, the amount of mold deposit (that is, a substance attached to a mold during molding; hereinafter, also referred to as “MD”) tends to be reduced.
- the liquid crystalline resin composition of the present invention includes other polymers, other fillers, and generally known substances generally added to synthetic resins, that is, antioxidants and ultraviolet absorbers, as long as the effects of the present invention are not impaired.
- Other components such as a stabilizer such as an agent, an antistatic agent, a flame retardant, a coloring agent such as a dye or a pigment, a lubricant, a crystallization accelerator, and a crystal nucleating agent can be appropriately added according to required performance.
- Other components may be used alone or in combination of two or more.
- fillers include fillers other than (B) granular fillers, (C) plate-like fillers, and (E) carbon black, and include, for example, fibrous fillers such as whiskers.
- fibrous fillers such as whiskers.
- the liquid crystalline resin composition of the present invention does not contain a fibrous filler from the viewpoint of the weld strength of the molded article and the like.
- the method for preparing the liquid crystalline resin composition for a ball bearing-resistant sliding wear member of the present invention is not particularly limited.
- the above components (A) to (C), and optionally, at least one of the above components (D) to (F) and other components are blended, and these are mixed using a single-screw or twin-screw extruder.
- a liquid crystal resin composition for a ball bearing resistant sliding wear member is prepared.
- the liquid crystalline resin composition of the present invention obtained as described above has a melt viscosity of preferably 90 Pa ⁇ sec or less and 80 Pa ⁇ sec or less from the viewpoint of fluidity during melting and moldability. More preferably, there is.
- the melt viscosity a value obtained by a measurement method in accordance with ISO 11443 under the conditions of a cylinder temperature 10 to 20 ° C. higher than the melting point of the liquid crystalline resin and a shear rate of 1000 sec ⁇ 1 is adopted.
- a ball bearing-resistant sliding wear member is manufactured using the liquid crystalline resin composition of the present invention.
- ADVANTAGE OF THE INVENTION The ball bearing sliding wear member of this invention is excellent in balance of surface whitening suppression, low warpage, weld strength, and low dust generation, and ball bearing sliding wear is reduced.
- the ball bearing-resistant sliding wear member of the present invention can be used for parts that come into dynamic contact with the ball bearing during use. Specifically, for example, it is used in a form that comes into contact with the ball bearing dynamically. Used for camera module parts such as a lens holder.
- HBA 4-hydroxybenzoic acid
- HNA 2-hydroxy-6-naphthoic acid
- TA terephthalic acid
- BP 4,4'-dihydroxybiphenyl
- APAP 4-acetoxyaminophenol
- APAP 126 g (5 mol%)
- Metal catalyst potassium acetate catalyst
- 110mg Acylating agent acetic anhydride
- Silica 1 Admafine SO-C4 (manufactured by Admatechs Co., Ltd., silica, median diameter 1.0 ⁇ m)
- Silica 2 Admafine SO-C5 (manufactured by Admatechs Co., Ltd., silica, median diameter 1.5 ⁇ m)
- Silica 3 Admafine SO-C6 (manufactured by Admatechs Co., Ltd., silica, median diameter 2.0 ⁇ m)
- Silica 4 Denka fused silica FB-5SDC (manufactured by Denki Kagaku Kogyo Co., Ltd., silica, median diameter 4.0 ⁇ m)
- Alumina Admafine AO-502 (manufactured by Admatechs Co., Ltd., alumina, median diameter 0.7 ⁇ m)
- Glass beads EGB731 (Potters Barotini Co., Ltd., alumina, median diameter 0.7 ⁇ m)
- Glass beads
- the bending strength of each of the measurement test pieces 13a and 13b was measured under the following measurement conditions, and the value obtained by dividing the bending strength of the measurement test piece 13b on the opposite side of the gate by the bending strength of the measurement test piece 13a on the gate side was used as the weld strength.
- the weld strength was evaluated according to the following criteria. The results are shown in Tables 1 to 4. ((Good): The weld strength retention was 55% or more. ⁇ (Somewhat good): The weld strength retention was 45% or more and less than 55%. X (bad): the weld strength retention was less than 45%.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Sliding-Contact Bearings (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
本発明の耐ボールベアリング摺動摩耗部材用液晶性樹脂組成物は、(A)液晶性樹脂、(B)粒状充填剤、及び、(C)板状充填剤を含有する。
本発明で使用する(A)液晶性樹脂とは、光学異方性溶融相を形成し得る性質を有する溶融加工性ポリマーを指す。異方性溶融相の性質は、直交偏光子を利用した慣用の偏光検査法により確認することが出来る。より具体的には、異方性溶融相の確認は、Leitz偏光顕微鏡を使用し、Leitzホットステージに載せた溶融試料を窒素雰囲気下で40倍の倍率で観察することにより実施できる。本発明に適用できる液晶性ポリマーは直交偏光子の間で検査したときに、たとえ溶融静止状態であっても偏光は通常透過し、光学的に異方性を示す。
(1)主として芳香族ヒドロキシカルボン酸及びその誘導体の1種又は2種以上に由来する繰り返し単位からなるポリエステル;
(2)主として(a)芳香族ヒドロキシカルボン酸及びその誘導体の1種又は2種以上に由来する繰り返し単位と、(b)芳香族ジカルボン酸、脂環族ジカルボン酸、及びそれらの誘導体の1種又は2種以上に由来する繰り返し単位とからなるポリエステル;
(3)主として(a)芳香族ヒドロキシカルボン酸及びその誘導体の1種又は2種以上に由来する繰り返し単位と、(b)芳香族ジカルボン酸、脂環族ジカルボン酸、及びそれらの誘導体の1種又は2種以上に由来する繰り返し単位と、(c)芳香族ジオール、脂環族ジオール、脂肪族ジオール、及びそれらの誘導体の少なくとも1種又は2種以上に由来する繰り返し単位、とからなるポリエステル;
(4)主として(a)芳香族ヒドロキシカルボン酸及びその誘導体の1種又は2種以上に由来する繰り返し単位と、(b)芳香族ヒドロキシアミン、芳香族ジアミン、及びそれらの誘導体の1種又は2種以上に由来する繰り返し単位と、(c)芳香族ジカルボン酸、脂環族ジカルボン酸、及びそれらの誘導体の1種又は2種以上に由来する繰り返し単位、とからなるポリエステルアミド;
(5)主として(a)芳香族ヒドロキシカルボン酸及びその誘導体の1種又は2種以上に由来する繰り返し単位と、(b)芳香族ヒドロキシアミン、芳香族ジアミン、及びそれらの誘導体の1種又は2種以上に由来する繰り返し単位と、(c)芳香族ジカルボン酸、脂環族ジカルボン酸、及びそれらの誘導体の1種又は2種以上に由来する繰り返し単位と、(d)芳香族ジオール、脂環族ジオール、脂肪族ジオール、及びそれらの誘導体の少なくとも1種又は2種以上に由来する繰り返し単位、とからなるポリエステルアミド等が挙げられる。更に上記の構成成分に必要に応じ分子量調整剤を併用してもよい。
(B)成分は粒状充填剤であり、(B)成分のメディアン径が1.3~5.0μmである。上記メディアン径が1.3μm以上であると、成形体のウェルド強度が高くなりやすい。上記メディアン径が5.0μm以下であると、成形体の表面白化抑制効果が高くなりやすい。上記メディアン径は、好ましくは1.5~5.0μmであり、より好ましくは1.5~4.0μmである。なお、本明細書において、メディアン径とは、レーザ回折/散乱式粒度分布測定法で測定した体積基準の中央値をいう。
本発明に係る液晶性樹脂組成物には、板状充填剤が含まれる。板状充填剤は、1種単独で又は2種以上組み合わせて使用することができる。
本発明において使用できるタルクとしては、当該タルクの全固形分量に対して、Fe2O3、Al2O3及びCaOの合計含有量が2.5質量%以下であり、Fe2O3及びAl2O3の合計含有量が1.0質量%超2.0質量%以下であり、かつCaOの含有量が0.5質量%未満であるものが好ましい。即ち、本発明において使用できるタルクは、その主成分たるSiO2及びMgOの他、Fe2O3、Al2O3及びCaOのうちの少なくとも1種を含有し、各成分が上記の含有量範囲で含有するものであってもよい。
本発明の液晶性組成物は、(D)エポキシ基含有共重合体を含有してもよい。(D)エポキシ基含有共重合体は、1種単独で又は2種以上組み合わせて使用することができる。(D)エポキシ基含有共重合体としては、特に限定されず、例えば、(D1)エポキシ基含有オレフィン系共重合体及び(D2)エポキシ基含有スチレン系共重合体からなる群より選択される少なくとも1種が挙げられる。(D)エポキシ基含有共重合体は、本発明の液晶性樹脂組成物から得られる成形体のボールベアリング摺動摩耗性を低減させることに寄与する。
本発明に任意成分として用いる(E)カーボンブラックは、樹脂着色に用いられる一般的に入手可能なものであれば、特に限定されるものではない。通常、(E)カーボンブラックには一次粒子が凝集して出来上がる塊状物が含まれているが、50μm以上の大きさの塊状物が著しく多く含まれていない限り、本発明の樹脂組成物を成形してなる成形体の表面に多くのブツ(カーボンブラックが凝集した細かいブツブツ状突起物(細かい凹凸))は発生しにくい。上記塊状物粒子径が50μm以上の粒子の含有率が20ppm以下であると、成形体表面の起毛抑制効果が高くなりやすい。好ましい含有率は5ppm以下である。
[(F)離型剤]
本発明に任意成分として用いる(F)離型剤としては、一般的に入手可能なものであれば、特に限定されるものではなく、例えば、脂肪酸エステル類、脂肪酸金属塩類、脂肪酸アミド類、低分子量ポリオレフィン等が挙げられ、ペンタエリスリトールの脂肪酸エステル(例えば、ペンタエリスリトールテトラステアレート)が好ましい。
本発明の液晶性樹脂組成物には、本発明の効果を害さない範囲で、その他の重合体、その他の充填剤、一般に合成樹脂に添加される公知の物質、即ち、酸化防止剤や紫外線吸収剤等の安定剤、帯電防止剤、難燃剤、染料や顔料等の着色剤、潤滑剤、結晶化促進剤、結晶核剤等のその他の成分も要求性能に応じ適宜添加することができる。その他の成分は1種単独で用いても2種以上を組み合わせて用いてもよい。
本発明の耐ボールベアリング摺動摩耗部材用液晶性樹脂組成物の調製方法は特に限定されない。例えば、上記(A)~(C)成分、並びに、任意に、上記(D)~(F)成分及びその他の成分の少なくとも1種を配合して、これらを1軸又は2軸押出機を用いて溶融混練処理することで、耐ボールベアリング摺動摩耗部材用液晶性樹脂組成物の調製が行われる。
本発明の液晶性樹脂組成物を用いて、耐ボールベアリング摺動摩耗部材を製造する。本発明の耐ボールベアリング摺動摩耗部材は、表面白化抑制、低そり性、ウェルド強度、及び低発塵性にバランスよく優れ、かつ、ボールベアリング摺動摩耗性が低減されている。本発明の耐ボールベアリング摺動摩耗部材は、使用時にボールベアリングと動的に接触するような部品に用いることができ、具体的には、例えば、ボールベアリングと動的に接するような形態で用いられる、レンズホルダー等のカメラモジュール用部品等に用いることができる。
・液晶性ポリエステルアミド樹脂
重合容器に下記の原料を仕込んだ後、反応系の温度を140℃に上げ、140℃で1時間反応させた。その後、更に340℃まで4.5時間かけて昇温し、そこから15分かけて10Torr(即ち1330Pa)まで減圧にして、酢酸、過剰の無水酢酸、及びその他の低沸分を留出させながら溶融重合を行った。撹拌トルクが所定の値に達した後、窒素を導入して減圧状態から常圧を経て加圧状態にして、重合容器の下部からポリマーを排出し、ストランドをペレタイズしてペレットを得た。得られたペレットについて、窒素気流下、300℃で2時間の熱処理を行って、目的のポリマーを得た。得られたポリマーの融点は336℃、350℃における溶融粘度は19.0Pa・sであった。なお、上記ポリマーの溶融粘度は、後述する溶融粘度の測定方法と同様にして測定した。
(I)4-ヒドロキシ安息香酸(HBA);1380g(60モル%)
(II)2-ヒドロキシ-6-ナフトエ酸(HNA);157g(5モル%)
(III)テレフタル酸(TA);484g(17.5モル%)
(IV)4,4’-ジヒドロキシビフェニル(BP);388g(12.5モル%)
(V)4-アセトキシアミノフェノール(APAP);126g(5モル%)
金属触媒(酢酸カリウム触媒);110mg
アシル化剤(無水酢酸);1659g
・シリカ1:アドマファインSO-C4((株)アドマテックス製、シリカ、メディアン径1.0μm)
・シリカ2:アドマファインSO-C5((株)アドマテックス製、シリカ、メディアン径1.5μm)
・シリカ3:アドマファインSO-C6((株)アドマテックス製、シリカ、メディアン径2.0μm)
・シリカ4:デンカ溶融シリカFB-5SDC(電気化学工業(株)製、シリカ、メディアン径4.0μm)
・アルミナ:アドマファインAO-502((株)アドマテックス製、アルミナ、メディアン径0.7μm)
・ガラスビーズ:EGB731(ポッターズ・バロティーニ(株)製、ガラスビーズ、メディアン径20.0μm)
・タルク:クラウンタルクPP(松村産業(株)製、タルク、メディアン径14.6μm)
・チタン酸カリウム:ティスモN-102(大塚化学(株)製、チタン酸カリウム繊維、平均繊維径0.3~0.6μm、平均繊維長10~20μm)
・ウォラストナイト:NYGLOS 8(NYCO Materials社製、ケイ酸カルシウムウィスカー(ウォラストナイト)、数平均繊維長136μm、平均繊維径8μm)
・エポキシ基含有オレフィン系共重合体:ボンドファースト2C(住友化学(株)製、エチレン-グリシジルメタクリレート共重合体、グリシジルメタクリレートの含有量6質量%)
・カーボンブラック:VULCAN XC305(キャボットジャパン(株)製、平均粒子径20nm、粒子径50μm以上の粒子の割合が20ppm以下)
・離型剤:ペンタエリスリトールテトラステアレート(エメリーオレオケミカルズジャパン(株)製)
上記成分を、表1~4に示す割合(単位:質量%)で二軸押出機((株)日本製鋼所製TEX30α型)を用いて、シリンダー温度350℃にて溶融混練し、耐ボールベアリング摺動摩耗部材用液晶性樹脂組成物ペレットを得た。
実施例及び比較例のペレットを、成形機(住友重機械工業(株)製 「SE30DUZ」)を用いて、以下の成形条件で成形し、測定用試験片(12.5mm×120mm×0.8mm)を得た。測定用試験片を3分間、室温の水中(80ml)で超音波洗浄機(出力300W、周波数45kHz)にかけた。その後、測定用試験片の表面を目視で観察した。測定用試験片の表面白化を下記の基準で評価した。結果を表1~4に示す。
○(良好):試験片の全面で白化が認められない。
○-(やや良好):ゲート付近及び/又はエジェクタピン痕付近にわずかな白化が認められる。
×(不良):試験片の平滑部に明らかな白化が認められる。
〔成形条件〕
シリンダー温度: 350℃
金型温度: 80℃
射出速度: 100mm/sec
実施例及び比較例のペレットを、成形機(住友重機械工業(株)製 「SE100DU」)を用いて、以下の成形条件で成形し、測定用試験片(80mm×80mm×1mm)を得た。軽荷重往復動試験機を用いて、図1に示す通り、測定用試験片1上で、グリース2を介して、アーム3先端のボール4(直径5mm、SUS製)に荷重をかけ、下記の往復摺動条件で往復摺動試験を行った後、測定用試験片1に残ったボールベアリング摺動痕の幅を、実体顕微鏡を用いて計測し、ボールベアリング摺動摩耗性を下記の基準で評価した。結果を表1~4に示す。
○(良好):ボールベアリング摺動痕の幅が540μm以下であった。
×(不良):ボールベアリング摺動痕の幅が540μm超であった。
〔成形条件〕
シリンダー温度: 350℃
金型温度: 80℃
射出速度: 33mm/sec
〔往復摺動条件〕
すべり速度:5cm/sec
ストローク:20mm
荷重:29.6N(3kg重)
往復回数:1000回
グリース:東レ・ダウコーニング(株)製、モリコートEM-30L
実施例及び比較例のペレットを、成形機(住友重機械工業(株)製 「SE30DUZ」)を用いて、以下の成形条件で成形し、図2(a)に示すような、10.0mm×10.0mm×1.0mmのカメラモジュール型成形品を得た。得られたカメラモジュール型成形品を水平な机の上に静置し、カメラモジュール型成形品の高さをミツトヨ製クイックビジョン404PROCNC画像測定機により測定した。その際、図2(b)において黒丸で示す複数の位置で高さを測定し、最小二乗平面からの最大高さと最小高さとの差をそり変形とした。そり性を下記の基準で評価した。結果を表1~4に示す。
○(良好):そり変形が0.020mm以下であった。
△(やや良好):そり変形が0.020mm超0.025mm以下であった。
×(不良):そり変形が0.025mm超であった。
〔成形条件〕
シリンダー温度: 350℃
金型温度: 80℃
射出速度: 100mm/sec
保圧: 50MPa
実施例及び比較例のペレットを下記成形条件で射出成形して、図3に示す通り、フィルムゲート11及び穴12を有する穴あき試験片10(穴あき平板30mm×30mm×0.3mm、穴径7mm)を得た。得られた穴あき試験片10から、穴12を挟んで、ゲート側4.5mm幅の部分と、反ゲート側4.5mm幅の部分とを切り出し、それぞれ測定用試験片13a及び13bとした。測定用試験片13a及び13b各々の曲げ強度を下記測定条件で測定し、反ゲート側の測定用試験片13bの曲げ強度をゲート側の測定用試験片13aの曲げ強度で除した値を、ウェルド強度保持率として、ウェルド強度を下記の基準で評価した。結果を表1~4に示す。
○(良好):ウェルド強度保持率が55%以上であった。
△(やや良好):ウェルド強度保持率が45%以上55%未満であった。
×(不良):ウェルド強度保持率が45%未満であった。
[成形条件]
成形機;住友重機械工業SE30DUZ
シリンダー温度;350℃-350℃-350℃-340℃-330℃
金型温度;90℃
射出速度;200mm/sec
保圧力;50MPa
保圧時間;2sec
冷却時間;8sec
スクリュー回転数;150rpm
スクリュー背圧;1MPa
[測定条件]
測定機;オリエンテック社テンシロン万能試験機製RTM-100
ロードセル;100kg
スパン:4.8mm
曲げ速度:2mm/min
実施例及び比較例のペレットを、成形機(住友重機械工業(株)製 「SE30DUZ」)を用いて、以下の成形条件で成形し、12.5mm×120mm×0.8mmの成形体を得た。この成形体を試験片として使用した。
〔成形条件〕
シリンダー温度: 350℃
金型温度: 80℃
射出速度: 100mm/sec
〔評価〕
上記試験片を3分間、室温の水中(80ml)で超音波洗浄機(出力300W、周波数45kHz)にかけた。その後、パーティクルカウンター(RION(株)製 液中微粒子計数器KL-11A(PARTICLECOUNTER))にて、上記水中に存在する2μm以上の粒子数を測定し、ダスト発生数として評価した。結果を表1~4に示す。
2 グリース
3 アーム
4 ボール
10 穴あき試験片
11 フィルムゲート11
12 穴
13a、13b 測定用試験片
Claims (4)
- (A)液晶性樹脂、
(B)粒状充填剤、及び
(C)板状充填剤
を含有し、
前記(B)粒状充填剤のメディアン径は、1.3~5.0μmであり、
前記(B)粒状充填剤の含有量は、7.5~22.5質量%であり、
前記(C)板状充填剤の含有量は、2.5~27.5質量%であり、
前記(B)粒状充填剤と前記(C)板状充填剤との合計の含有量は、22.5~37.5質量%である耐ボールベアリング摺動摩耗部材用液晶性樹脂組成物。 - 前記(B)粒状充填剤は、シリカであり、
前記(C)板状充填剤は、タルクである請求項1に記載の組成物。 - 更に(D)エポキシ基含有共重合体を含有する請求項1又は2に記載の組成物であって、
前記(D)エポキシ基含有共重合体の含有量は、1~5質量%である組成物。 - 請求項1から3のいずれかに記載の組成物からなる耐ボールベアリング摺動摩耗部材。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201980064176.4A CN112789328B (zh) | 2018-10-05 | 2019-10-03 | 耐球轴承滑动磨损构件用液晶性树脂组合物和使用其的耐球轴承滑动磨损构件 |
| JP2020515057A JP6823760B2 (ja) | 2018-10-05 | 2019-10-03 | 耐ボールベアリング摺動摩耗部材用液晶性樹脂組成物及びそれを用いた耐ボールベアリング摺動摩耗部材 |
| KR1020217007627A KR102323582B1 (ko) | 2018-10-05 | 2019-10-03 | 내 볼베어링 접동 마모 부재용 액정성 수지 조성물 및 이를 이용한 내 볼베어링 접동 마모 부재 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018190300 | 2018-10-05 | ||
| JP2018-190300 | 2018-10-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2020071495A1 true WO2020071495A1 (ja) | 2020-04-09 |
Family
ID=70055415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2019/039166 Ceased WO2020071495A1 (ja) | 2018-10-05 | 2019-10-03 | 耐ボールベアリング摺動摩耗部材用液晶性樹脂組成物及びそれを用いた耐ボールベアリング摺動摩耗部材 |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP6823760B2 (ja) |
| KR (1) | KR102323582B1 (ja) |
| CN (1) | CN112789328B (ja) |
| TW (1) | TWI788593B (ja) |
| WO (1) | WO2020071495A1 (ja) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021065416A1 (ja) * | 2019-10-03 | 2021-04-08 | ポリプラスチックス株式会社 | 耐ボールベアリング摺動摩耗部材用液晶性樹脂組成物及びそれを用いた耐ボールベアリング摺動摩耗部材 |
| JPWO2022004553A1 (ja) * | 2020-06-30 | 2022-01-06 | ||
| WO2022070695A1 (ja) * | 2020-09-29 | 2022-04-07 | ポリプラスチックス株式会社 | 耐ボールベアリング摺動摩耗部材用液晶性樹脂組成物及びそれを用いた耐ボールベアリング摺動摩耗部材 |
| JP2022068704A (ja) * | 2020-10-22 | 2022-05-10 | 上野製薬株式会社 | 液晶ポリマー組成物 |
| US11722759B2 (en) | 2019-03-20 | 2023-08-08 | Ticona Llc | Actuator assembly for a camera module |
| US12032272B2 (en) | 2019-03-20 | 2024-07-09 | Ticona Llc | Polymer composition for use in a camera module |
| US12209163B2 (en) | 2021-05-06 | 2025-01-28 | Ticona Llc | Polymer composition for use in a camera module |
| WO2025070216A1 (ja) * | 2023-09-29 | 2025-04-03 | ポリプラスチックス株式会社 | 液晶性樹脂組成物及びそれを用いたカメラモジュール |
| WO2025074968A1 (ja) * | 2023-10-04 | 2025-04-10 | ポリプラスチックス株式会社 | 液晶性樹脂組成物及びそれを用いたカメラモジュール |
| US12282005B2 (en) | 2021-12-13 | 2025-04-22 | Tiocona LLC | Technique for testing the ball dent properties of a sample |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117098796A (zh) | 2021-02-04 | 2023-11-21 | 提克纳有限责任公司 | 用于电路保护装置的聚合物组合物 |
| KR102874880B1 (ko) | 2022-12-29 | 2025-10-22 | 삼성전기주식회사 | 액정성 수지 조성물 및 이를 이용하여 제조된 볼베어링 접동 부품 |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05230343A (ja) * | 1992-02-24 | 1993-09-07 | Nippon Petrochem Co Ltd | 潤滑性媒体含浸成形体 |
| JP2010037474A (ja) * | 2008-08-07 | 2010-02-18 | Polyplastics Co | 全芳香族ポリエステル及びポリエステル樹脂組成物 |
| JP2012031391A (ja) * | 2010-06-28 | 2012-02-16 | Toray Ind Inc | 液晶性樹脂組成物およびその製造方法 |
| JP2012206296A (ja) * | 2011-03-29 | 2012-10-25 | Sumitomo Chemical Co Ltd | 液晶ポリエステル組成物の製造方法 |
| JP2014116421A (ja) * | 2012-12-07 | 2014-06-26 | Kaneka Corp | 絶縁ケース |
| WO2015016370A1 (ja) * | 2013-07-31 | 2015-02-05 | 住友化学株式会社 | 液晶ポリエステル組成物 |
| JP2017066412A (ja) * | 2011-02-28 | 2017-04-06 | 住友化学株式会社 | 液晶ポリエステル組成物 |
| JP2017082158A (ja) * | 2015-10-30 | 2017-05-18 | 東レ株式会社 | 液晶性ポリエステル樹脂組成物およびそれからなる成形品 |
| WO2017110424A1 (ja) * | 2015-12-24 | 2017-06-29 | ポリプラスチックス株式会社 | カメラモジュール用液晶性樹脂組成物、その製造方法、及び上記組成物を用いたカメラモジュール |
| JP2018106005A (ja) * | 2016-12-26 | 2018-07-05 | ポリプラスチックス株式会社 | カメラモジュール用液晶性樹脂組成物及びそれを用いたカメラモジュール |
| JP2019006973A (ja) * | 2017-06-28 | 2019-01-17 | 東レ株式会社 | 液晶性ポリエステル樹脂組成物、成形品および成形品の製造方法 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0587958A (ja) | 1991-09-30 | 1993-04-09 | Casio Comput Co Ltd | 多機能電子時計 |
| US9618770B2 (en) | 2014-04-11 | 2017-04-11 | Samsung Electro-Mechanics Co., Ltd. | Camera module with function of auto-focus and image stabilize |
-
2019
- 2019-10-03 WO PCT/JP2019/039166 patent/WO2020071495A1/ja not_active Ceased
- 2019-10-03 CN CN201980064176.4A patent/CN112789328B/zh active Active
- 2019-10-03 JP JP2020515057A patent/JP6823760B2/ja active Active
- 2019-10-03 KR KR1020217007627A patent/KR102323582B1/ko active Active
- 2019-10-04 TW TW108136015A patent/TWI788593B/zh active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05230343A (ja) * | 1992-02-24 | 1993-09-07 | Nippon Petrochem Co Ltd | 潤滑性媒体含浸成形体 |
| JP2010037474A (ja) * | 2008-08-07 | 2010-02-18 | Polyplastics Co | 全芳香族ポリエステル及びポリエステル樹脂組成物 |
| JP2012031391A (ja) * | 2010-06-28 | 2012-02-16 | Toray Ind Inc | 液晶性樹脂組成物およびその製造方法 |
| JP2017066412A (ja) * | 2011-02-28 | 2017-04-06 | 住友化学株式会社 | 液晶ポリエステル組成物 |
| JP2012206296A (ja) * | 2011-03-29 | 2012-10-25 | Sumitomo Chemical Co Ltd | 液晶ポリエステル組成物の製造方法 |
| JP2014116421A (ja) * | 2012-12-07 | 2014-06-26 | Kaneka Corp | 絶縁ケース |
| WO2015016370A1 (ja) * | 2013-07-31 | 2015-02-05 | 住友化学株式会社 | 液晶ポリエステル組成物 |
| JP2017082158A (ja) * | 2015-10-30 | 2017-05-18 | 東レ株式会社 | 液晶性ポリエステル樹脂組成物およびそれからなる成形品 |
| WO2017110424A1 (ja) * | 2015-12-24 | 2017-06-29 | ポリプラスチックス株式会社 | カメラモジュール用液晶性樹脂組成物、その製造方法、及び上記組成物を用いたカメラモジュール |
| JP2018106005A (ja) * | 2016-12-26 | 2018-07-05 | ポリプラスチックス株式会社 | カメラモジュール用液晶性樹脂組成物及びそれを用いたカメラモジュール |
| JP2019006973A (ja) * | 2017-06-28 | 2019-01-17 | 東レ株式会社 | 液晶性ポリエステル樹脂組成物、成形品および成形品の製造方法 |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12032272B2 (en) | 2019-03-20 | 2024-07-09 | Ticona Llc | Polymer composition for use in a camera module |
| US11722759B2 (en) | 2019-03-20 | 2023-08-08 | Ticona Llc | Actuator assembly for a camera module |
| WO2021065416A1 (ja) * | 2019-10-03 | 2021-04-08 | ポリプラスチックス株式会社 | 耐ボールベアリング摺動摩耗部材用液晶性樹脂組成物及びそれを用いた耐ボールベアリング摺動摩耗部材 |
| KR102545958B1 (ko) | 2020-06-30 | 2023-06-22 | 포리프라스틱 가부시키가이샤 | 내 볼베어링 접동 마모 부재용 액정성 수지 조성물 및 이를 이용한 내 볼베어링 접동 마모 부재 |
| JPWO2022004553A1 (ja) * | 2020-06-30 | 2022-01-06 | ||
| WO2022004553A1 (ja) * | 2020-06-30 | 2022-01-06 | ポリプラスチックス株式会社 | 耐ボールベアリング摺動摩耗部材用液晶性樹脂組成物及びそれを用いた耐ボールベアリング摺動摩耗部材 |
| CN115702206B (zh) * | 2020-06-30 | 2023-12-12 | 宝理塑料株式会社 | 耐球轴承滑动磨损构件用液晶性树脂组合物和使用其的耐球轴承滑动磨损构件 |
| JP7200435B2 (ja) | 2020-06-30 | 2023-01-06 | ポリプラスチックス株式会社 | 耐ボールベアリング摺動摩耗部材用液晶性樹脂組成物及びそれを用いた耐ボールベアリング摺動摩耗部材 |
| KR20230008223A (ko) * | 2020-06-30 | 2023-01-13 | 포리프라스틱 가부시키가이샤 | 내 볼베어링 접동 마모 부재용 액정성 수지 조성물 및 이를 이용한 내 볼베어링 접동 마모 부재 |
| CN115702206A (zh) * | 2020-06-30 | 2023-02-14 | 宝理塑料株式会社 | 耐球轴承滑动磨损构件用液晶性树脂组合物和使用其的耐球轴承滑动磨损构件 |
| JP7101323B1 (ja) * | 2020-09-29 | 2022-07-14 | ポリプラスチックス株式会社 | 耐ボールベアリング摺動摩耗部材用液晶性樹脂組成物及びそれを用いた耐ボールベアリング摺動摩耗部材 |
| KR102532937B1 (ko) | 2020-09-29 | 2023-05-16 | 포리프라스틱 가부시키가이샤 | 내 볼베어링 접동 마모 부재용 액정성 수지 조성물 및 이를 이용한 내 볼베어링 접동 마모 부재 |
| CN116490572A (zh) * | 2020-09-29 | 2023-07-25 | 宝理塑料株式会社 | 耐球轴承滑动磨损构件用液晶性树脂组合物和使用其的耐球轴承滑动磨损构件 |
| KR20230042388A (ko) * | 2020-09-29 | 2023-03-28 | 포리프라스틱 가부시키가이샤 | 내 볼베어링 접동 마모 부재용 액정성 수지 조성물 및 이를 이용한 내 볼베어링 접동 마모 부재 |
| CN116490572B (zh) * | 2020-09-29 | 2023-11-10 | 宝理塑料株式会社 | 耐球轴承滑动磨损构件用液晶性树脂组合物和使用其的耐球轴承滑动磨损构件 |
| WO2022070695A1 (ja) * | 2020-09-29 | 2022-04-07 | ポリプラスチックス株式会社 | 耐ボールベアリング摺動摩耗部材用液晶性樹脂組成物及びそれを用いた耐ボールベアリング摺動摩耗部材 |
| JP2022068704A (ja) * | 2020-10-22 | 2022-05-10 | 上野製薬株式会社 | 液晶ポリマー組成物 |
| JP7498641B2 (ja) | 2020-10-22 | 2024-06-12 | 上野製薬株式会社 | 液晶ポリマー組成物 |
| US12209163B2 (en) | 2021-05-06 | 2025-01-28 | Ticona Llc | Polymer composition for use in a camera module |
| US12282005B2 (en) | 2021-12-13 | 2025-04-22 | Tiocona LLC | Technique for testing the ball dent properties of a sample |
| WO2025070216A1 (ja) * | 2023-09-29 | 2025-04-03 | ポリプラスチックス株式会社 | 液晶性樹脂組成物及びそれを用いたカメラモジュール |
| WO2025074968A1 (ja) * | 2023-10-04 | 2025-04-10 | ポリプラスチックス株式会社 | 液晶性樹脂組成物及びそれを用いたカメラモジュール |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112789328A (zh) | 2021-05-11 |
| TW202028300A (zh) | 2020-08-01 |
| CN112789328B (zh) | 2022-02-01 |
| TWI788593B (zh) | 2023-01-01 |
| JPWO2020071495A1 (ja) | 2021-02-15 |
| KR20210035309A (ko) | 2021-03-31 |
| KR102323582B1 (ko) | 2021-11-08 |
| JP6823760B2 (ja) | 2021-02-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2020071495A1 (ja) | 耐ボールベアリング摺動摩耗部材用液晶性樹脂組成物及びそれを用いた耐ボールベアリング摺動摩耗部材 | |
| JP5680788B2 (ja) | カメラモジュール用液晶性樹脂組成物 | |
| JP5826411B2 (ja) | カメラモジュール用液晶性樹脂組成物及びそれを用いたカメラモジュール | |
| CN108350278B (zh) | 照相机模块用液晶性树脂组合物、其制造方法及使用有该组合物的照相机模块 | |
| JP6762228B2 (ja) | カメラモジュール用液晶性樹脂組成物及びそれを用いたカメラモジュール | |
| JP6164945B2 (ja) | カメラモジュール用液晶性樹脂組成物 | |
| CN114502657B (zh) | 耐球轴承滑动磨损构件用液晶性树脂组合物和使用其的耐球轴承滑动磨损构件 | |
| CN115702206B (zh) | 耐球轴承滑动磨损构件用液晶性树脂组合物和使用其的耐球轴承滑动磨损构件 | |
| TWI762713B (zh) | 耐滑動磨耗構件用液晶性樹脂組合物及使用該組合物的耐滑動磨耗構件 | |
| JP7199853B2 (ja) | 耐摺動摩耗部材用液晶性樹脂組成物及びそれを用いた耐摺動摩耗部材 | |
| JPWO2017038421A1 (ja) | カメラモジュール用液晶性樹脂組成物及びそれを用いたカメラモジュール | |
| TW201925343A (zh) | 耐滑動磨耗構件用液晶性樹脂組合物及使用該組合物的耐滑動磨耗構件 | |
| JP7101323B1 (ja) | 耐ボールベアリング摺動摩耗部材用液晶性樹脂組成物及びそれを用いた耐ボールベアリング摺動摩耗部材 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ENP | Entry into the national phase |
Ref document number: 2020515057 Country of ref document: JP Kind code of ref document: A |
|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 19868343 Country of ref document: EP Kind code of ref document: A1 |
|
| ENP | Entry into the national phase |
Ref document number: 20217007627 Country of ref document: KR Kind code of ref document: A |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 19868343 Country of ref document: EP Kind code of ref document: A1 |