WO2017038421A1 - Liquid crystalline resin composition for camera module and camera module using same - Google Patents
Liquid crystalline resin composition for camera module and camera module using same Download PDFInfo
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- WO2017038421A1 WO2017038421A1 PCT/JP2016/073623 JP2016073623W WO2017038421A1 WO 2017038421 A1 WO2017038421 A1 WO 2017038421A1 JP 2016073623 W JP2016073623 W JP 2016073623W WO 2017038421 A1 WO2017038421 A1 WO 2017038421A1
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- camera module
- liquid crystalline
- crystalline resin
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- resin composition
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- 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
- C08K7/02—Fibres or whiskers
-
- 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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/10—Silicon-containing compounds
-
- 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
- C08L101/02—Compositions of unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
- C08L101/06—Compositions of unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups containing oxygen atoms
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
Definitions
- the present invention relates to a liquid crystal resin composition for a camera module and a camera module using the same.
- Liquid crystalline resins typified by liquid crystalline polyester resins have excellent mechanical strength, heat resistance, chemical resistance, electrical properties, etc. in a well-balanced manner and have excellent dimensional stability. It's being used. Recently, liquid crystal resins have been used for precision equipment parts by taking advantage of these features.
- a small amount of dust, dust, etc. will affect the performance of the equipment.
- a part used in an optical device such as a camera module
- the optical characteristics of the camera module are significantly deteriorated.
- the parts that make up the camera module (hereinafter sometimes referred to as “camera module parts”) are ultrasonically cleaned before being assembled and attached to the surface. Small dust, oil, dust, etc. are removed.
- the molded body formed by molding the liquid crystalline resin composition is easy to peel off because the molecular orientation of the polymer is particularly large in the surface portion.
- the fluffing phenomenon of peeling and fluffing occurs, and the fluffed raised portion causes small dust.
- liquid crystalline resin composition when used as a raw material for camera module parts, a special liquid crystalline resin composition that does not raise the surface of the molded body even when the molded body is subjected to ultrasonic cleaning is used.
- a special liquid crystalline resin composition a liquid crystalline resin composition for a camera module containing a liquid crystalline resin, a specific talc, and carbon black is disclosed (see Patent Document 1).
- the liquid crystalline resin composition for a camera module described in Patent Document 1 has insufficient suppression of raising of the surface of the molded article, and the molded article is more difficult to raise the surface of the molded article.
- a liquid crystalline resin composition for a camera module for manufacturing the above is required.
- liquid crystalline resin composition for a camera module for producing a molded article having excellent heat resistance is required from the viewpoint of making it difficult to cause problems during processing and use of the camera module.
- liquid crystalline resin composition for camera modules is required to have high fluidity when melted from the viewpoint of moldability.
- the present invention has been made in order to solve the above-mentioned problems, and its purpose is to produce a camera module component that has a surface that is less likely to be raised, is prevented from warping, has high mechanical strength, and is excellent in heat resistance.
- Another object of the present invention is to provide a liquid crystalline resin composition for a camera module that is used in the above and has high fluidity when melted.
- the inventors of the present invention have made extensive studies to solve the above problems.
- the liquid crystal resin, the fibrous wollastonite, the epoxy group-containing copolymer, and the plate-like filler are used in a specific ratio to solve the above problems.
- the present inventors have found that this can be done and have completed the present invention. More specifically, the present invention provides the following.
- A Liquid crystalline resin
- B Fibrous wollastonite
- C an epoxy group-containing copolymer
- D a plate-like filler
- the component (A) content is 55 to 95.5% by mass
- the component (B) content is 2.5 to 25% by mass
- the component (C) content is 1.0 to 4.5% by mass
- a liquid crystalline resin composition for a camera module wherein the content of the component (D) is 10 to 35% by mass, and the total content of the component (B) and the component (D) is 20 to 37.5% by mass.
- the (C) epoxy group-containing copolymer is at least one selected from the group consisting of (C1) an epoxy group-containing olefin copolymer and (C2) an epoxy group-containing styrene copolymer.
- the composition according to (1) is at least one selected from the group consisting of (C1) an epoxy group-containing olefin copolymer and (C2) an epoxy group-containing styrene copolymer.
- a camera module part comprising the composition according to (1) or (2).
- the liquid crystalline resin composition for a camera module of the present invention has high fluidity at the time of melting.
- the surface is hardly raised and warpage deformation is suppressed.
- Camera module parts with high strength and excellent heat resistance can be obtained.
- the liquid crystalline resin composition for a camera module of the present invention contains (A) liquid crystalline resin, (B) fibrous wollastonite, (C) an epoxy group-containing copolymer, and (D) a plate-like filler. .
- the (A) liquid crystalline resin used in the present invention refers to a melt processable polymer having a property capable of forming an optically anisotropic molten phase.
- the property 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 a molten sample placed on a Leitz hot stage under a nitrogen atmosphere at a magnification of 40 times.
- the liquid crystalline polymer applicable to the present invention is inspected between crossed polarizers, the polarized light is normally transmitted even in the molten stationary state, and optically anisotropic.
- the type of (A) liquid crystalline resin as described above is not particularly limited, and is preferably an aromatic polyester and / or an aromatic polyester amide. Moreover, the polyester which partially contains aromatic polyester and / or aromatic polyester amide in the same molecular chain is also within 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) of 1 are preferably used.
- the aromatic polyester or aromatic polyester amide as the liquid crystalline resin (A) 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 polyesteramide comprising a repeating unit derived from at least one species and (c) a repeating unit derived from one or more of aromatic dicarboxylic acid, alicyclic dicarboxylic acid, and derivatives thereof; (4) a repeating unit mainly derived from (a) one or more of aromatic hydroxycarboxylic acids and derivatives thereof; and (b) one or two of aromatic hydroxyamines, aromatic diamines and derivatives thereof.
- a repeating unit derived from more than one species (c) a repeating unit derived from one or more of aromatic dicarboxylic acid, alicyclic dicarboxylic acid and derivatives thereof, and (d) aromatic diol, alicyclic And polyester amides composed of a repeating unit derived from at least one or more of an aliphatic diol, an aliphatic diol, and derivatives thereof. Furthermore, you may use a molecular weight regulator together with said structural component as needed.
- Aromatic hydroxycarboxylic acids such as p-hydroxybenzoic acid and 6-hydroxy-2-naphthoic acid, and 2,6-dihydroxy.
- Aromatic diols such as naphthalene, 1,4-dihydroxynaphthalene, 4,4′-dihydroxybiphenyl, hydroquinone, resorcin, compounds represented by the following general formula (I), and compounds 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- Aromatic amines such as phenylenediamine are listed.
- X is a group selected from alkylene (C 1 -C 4 ), alkylidene, —O—, —SO—, —SO 2 —, —S—, and —CO—)
- the (A) liquid crystalline resin used in the present invention can be prepared from the above monomer compound (or a mixture of monomers) by a known method using a direct polymerization method or a transesterification method, and usually a melt polymerization method. Or a slurry polymerization method.
- the above compounds having ester-forming ability may be used for polymerization in the form as they are, or may be modified from a precursor to a derivative having ester-forming ability in the previous stage of polymerization.
- various catalysts can be used. Typical examples include dialkyl tin oxide, diaryl tin oxide, titanium dioxide, alkoxy titanium silicates, titanium alcoholates, and alkali of carboxylic acid.
- the amount of the catalyst used is generally about 0.001 to 1% by weight, particularly about 0.01 to 0.2% by weight, based on the total weight of monomers. If the polymer produced by these polymerization methods is further necessary, the molecular weight can be increased by solid-phase polymerization by heating in a reduced pressure or an inert gas.
- the melt viscosity of the (A) liquid crystalline resin obtained by the above method is not particularly limited. In general, those having a melt viscosity at a molding temperature of 10 MPa or more and 600 MPa or less at a shear rate of 1000 sec ⁇ 1 can be used. However, those having a very high viscosity are not preferable because the fluidity is extremely deteriorated.
- the (A) liquid crystalline resin may be a mixture of two or more liquid crystalline resins.
- the content of (A) liquid crystalline resin is 55 to 95.5% by mass. If the content of the component (A) is 55% by mass or more, it is preferable because of fluidity and suppression of raising of the surface of the molded body, and if the content of the component (A) is 95.5% by mass or less, the reason is heat resistance. Is preferable. Further, the preferable content of the component (A) is 60 to 80% by mass, and the more preferable content of the component (A) is 62 to 70% by mass.
- (B) Fibrous wollastonite means wollastonite having an aspect ratio, that is, an average fiber length / average fiber diameter value of 8 or more.
- the aspect ratio is preferably 10 to 25 and more preferably 15 to 20 from the viewpoint of the effect of suppressing the raising of the surface of the molded body.
- wollastonite having an aspect ratio of less than 8 is referred to as granular wollastonite.
- the fibrous wollastonite is not particularly limited, and for example, a known fibrous wollastonite can be used.
- a fibrous wollastonite may be used individually by 1 type, and may be used in combination of 2 or more types from which an aspect ratio, an average fiber length, an average fiber diameter, etc. differ.
- the average fiber diameter of the fibrous wollastonite is preferably 3.0 to 50 ⁇ m, and more preferably 4.5 to 40 ⁇ m.
- the average fiber diameter is 3.0 ⁇ m or more, the mechanical strength and the deflection temperature under load necessary for the camera module are easily secured.
- the average fiber diameter is 50 ⁇ m or less, the effect of suppressing napping on the surface of the molded body tends to be high.
- the average fiber diameter a value obtained by capturing a stereoscopic microscope image from a CCD camera into a PC and measuring the image by an image processing method is employed.
- the average fiber length of the fibrous wollastonite is preferably 30 to 800 ⁇ m, and more preferably 50 to 600 ⁇ m.
- the average fiber length is 30 ⁇ m or more, the mechanical strength and the deflection temperature under load necessary for the camera module are easily secured.
- the average fiber length is 800 ⁇ m or less, the effect of suppressing napping on the surface of the molded body tends to increase.
- the average fiber length a value obtained by taking a stereoscopic microscope image from a CCD camera into a PC and measuring by an image processing method using an image measuring machine is adopted.
- the content of the component (B) is 2.5 to 25% by mass in the liquid crystal composition for a camera module of the present invention.
- the content of the component (B) is 2.5% by mass or more, the mechanical strength and the deflection temperature under load necessary for the camera module are easily secured.
- the content of the component (B) is 25% by mass or less, the fluidity at the time of melting the composition is easily improved, the effect of suppressing the raising of the surface of the molded body is likely to be high, and the effect of suppressing warpage deformation of the molded body is high. Prone.
- a more preferable content is 5 to 20% by mass.
- the epoxy group-containing copolymer can be used alone or in combination of two or more.
- the (C) epoxy group-containing copolymer is not particularly limited. For example, at least selected from the group consisting of (C1) an epoxy group-containing olefin copolymer and (C2) an epoxy group-containing styrene copolymer.
- One type is mentioned.
- Mixing the component (C) with the liquid crystalline resin composition for a camera module contributes to suppressing raising of the surface of the molded product when the molded product obtained by molding the composition is subjected to ultrasonic cleaning. The reason for suppressing the raising is not clarified, but it is considered that by adding a certain amount, the surface state of the molded body is changed, and the change contributes to suppressing the raising.
- Examples of the (C1) 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. It is done.
- the ⁇ -olefin is not particularly limited and includes, for example, ethylene, propylene, butene, etc. Among them, ethylene is preferably used.
- the glycidyl ester of ⁇ , ⁇ -unsaturated acid is represented by the following general formula (IV).
- the glycidyl ester of ⁇ , ⁇ -unsaturated acid is, for example, glycidyl acrylate, glycidyl methacrylate, glycidyl ethacrylate, glycidyl itaconate, etc., and glycidyl methacrylate is particularly preferable.
- the content of the repeating unit derived from ⁇ -olefin is 87 to 98% by mass, and the content of the repeating unit derived from the glycidyl ester of ⁇ , ⁇ -unsaturated acid The amount is preferably 13 to 2% by mass.
- the (C1) epoxy group-containing olefin-based copolymer used in the present invention is composed of acrylonitrile, acrylic acid ester, methacrylic acid ester, ⁇ -methylstyrene, anhydrous maleic as a third component in addition to the above two components within the range not impairing the present invention.
- a repeating unit derived from one or more olefinic unsaturated esters such as an acid may be contained in an amount of 0 to 48 parts by mass with respect to 100 parts by mass of the two components.
- the epoxy group-containing olefin copolymer which is the component (C1) of the present invention can be easily prepared by a normal radical polymerization method using a monomer and a radical polymerization catalyst corresponding to each component. More specifically, the presence of a suitable solvent or chain transfer agent is usually obtained by mixing ⁇ -olefin and glycidyl ester of ⁇ , ⁇ -unsaturated acid in the presence of a radical generator at 500 to 4000 atm and 100 to 300 ° C. It can be produced by a method of copolymerization under or in the absence.
- It can also be produced by a method in which an ⁇ -olefin, a glycidyl ester of ⁇ , ⁇ -unsaturated acid and a radical generator are mixed and melt graft copolymerized in an extruder.
- Examples of the epoxy group-containing styrenic copolymer (C2) include copolymers composed of repeating units derived from styrenes and repeating units derived from glycidyl esters of ⁇ , ⁇ -unsaturated acids. It is done. Since the glycidyl ester of ⁇ , ⁇ -unsaturated acid is the same as that described for the component (C1), description thereof is omitted.
- styrenes examples include styrene, ⁇ -methylstyrene, brominated styrene, divinylbenzene and the like, and styrene is preferably used.
- the (C2) epoxy group-containing styrene copolymer used in the present invention is a multi-component copolymer containing a repeating unit derived from one or more other vinyl monomers as a third component in addition to the above two components. There may be. Suitable as the third component is a repeating unit derived from one or more olefinic unsaturated esters such as acrylonitrile, acrylic acid ester, methacrylic acid ester, and maleic anhydride. An epoxy group-containing styrene copolymer containing 40% by mass or less of these repeating units in the copolymer is preferred as the component (C2).
- the content of repeating units derived from glycidyl ester of ⁇ , ⁇ -unsaturated acid in the epoxy group-containing styrene copolymer is 2 to 20% by mass, and the content of repeating units derived from styrenes Is preferably 80 to 98% by mass.
- the epoxy group-containing styrenic copolymer can be prepared by a normal radical polymerization method using a monomer corresponding to each component and a radical polymerization catalyst. More specifically, styrenes and glycidyl esters of ⁇ , ⁇ -unsaturated acids are usually present in the presence of a radical generator at 500 to 4000 atm and 100 to 300 ° C. in the presence of a suitable solvent or chain transfer agent. Or it can manufacture by the method of copolymerizing in absence.
- It can also be produced by a method in which styrenes, an ⁇ , ⁇ -unsaturated glycidyl ester and a radical generator are mixed and subjected to melt graft copolymerization in an extruder.
- the (C) epoxy group-containing copolymer is preferably (C1) an epoxy group-containing olefin copolymer from the viewpoint of heat resistance.
- the ratio between these components can be appropriately selected according to the required characteristics.
- the content of the epoxy group-containing copolymer is 1.0 to 4.5% by mass in the resin composition for a camera module of the present invention.
- the content of the component (C) is 1.0% by mass or more from the viewpoint of suppressing raising of the surface of the molded body, and 4.5% by mass or less is good without impairing fluidity. Necessary for the reason of obtaining a molded body.
- a more preferable content is 2.0 to 4.0% by mass.
- the plate-like filler preferably has an average particle size of 20 to 50 ⁇ m.
- the average particle diameter is 20 ⁇ m or more, the mechanical strength and the deflection temperature under load necessary for the camera module are easily secured, and the warpage deformation suppressing effect of the molded body is likely to increase.
- the average particle size is preferably 23 to 30 ⁇ m. In this specification, the value measured by the laser diffraction / scattering particle size distribution measurement method is adopted as the average particle size.
- the plate-like filler is not particularly limited, and examples thereof include mica, talc, glass flake, graphite, various metal foils (for example, aluminum foil, iron foil, copper foil) and the like.
- the component (D) two or more kinds may be used.
- mica and talc are preferably used as the component (D), and mica is more preferably used.
- the content of the component (D) is 10 to 35% by mass in the liquid crystal composition for a camera module of the present invention.
- the content of the component (D) is 10% by mass or more, the mechanical strength and the deflection temperature under load necessary for the camera module are easily secured, and the warpage deformation suppressing effect of the molded body is likely to increase.
- the content of the component (D) is 35% by mass or less, the effect of suppressing the raising of the surface of the molded body tends to be high.
- the above content is preferably 15 to 30% by mass.
- the total content of the component (B) and the component (D) is 20 to 37.5% by mass, preferably 25 to 35% by mass in the liquid crystal composition for a camera module of the present invention. .
- the total content is 20% by mass or more, the mechanical strength and the deflection temperature under load necessary for the camera module are easily secured.
- the total content is 37.5% by mass or less, the fluidity at the time of melting of the composition is easily improved, the effect of suppressing the raising of the surface of the molded body is easily increased, and the impact resistance of the molded body is increased. Cheap.
- the carbon black (E) used as an optional component in the present invention is not particularly limited as long as it is generally available for use in resin coloring. Normally, (E) carbon black contains a lump formed by agglomeration of primary particles, but the resin composition of the present invention is molded unless a large amount of lump having a size of 50 ⁇ m or more is contained. Many bumps (fine bumpy projections (fine irregularities) in which carbon black is aggregated) hardly occur on the surface of the molded body. When the content of particles having a lump particle diameter of 50 ⁇ m or more is 20 ppm or less, the effect of suppressing napping on the surface of the molded product tends to be high. A preferable content rate is 5 ppm or less.
- the blending amount of carbon black is preferably in the range of 0.5 to 5% by mass in the liquid crystalline resin composition for camera modules.
- the blending amount of the carbon black is 0.5% by mass or more, the jetness of the obtained resin composition is not easily lowered, and the light shielding property is less likely to be anxious.
- the blending amount of the carbon black is 5% by mass or less, it is difficult to be uneconomical, and it is difficult to generate bumps.
- the liquid crystalline resin composition for a camera module of the present invention includes other polymers, other fillers, known substances generally added to synthetic resins, that is, antioxidants, as long as the effects of the present invention are not impaired.
- Stabilizers such as UV absorbers, antistatic agents, flame retardants, colorants such as dyes and pigments, lubricants, mold release agents, crystallization accelerators, crystal nucleating agents, etc. may be added as appropriate according to the required performance. it can.
- fillers refer to fillers other than (B) fibrous wollastonite, (D) plate-like filler, and (E) carbon black, such as wollastonite having an aspect ratio of less than 8.
- the preparation of the resin composition for a camera module of the present invention is not particularly limited. For example, by blending the above components (A), (B), (C), and (D), and melt-kneading these using a single screw or twin screw extruder, a liquid crystalline resin for a camera module Preparation of the composition takes place.
- the shape of the component (B) in the liquid crystalline resin composition for a camera module of the present invention is different from the shape of the component (B) before blending.
- the shape of the above component (B) is the shape before blending. If the shape before blending is as described above, a camera module component that is less prone to raising the surface can be obtained.
- the shape of the component (D) in the liquid crystalline resin composition for a camera module of the present invention is different from the shape of the component (D) before blending.
- the shape of the above component (D) is the shape before blending. If the shape before blending is as described above, a camera module component in which warpage deformation is suppressed can be obtained.
- the liquid crystalline resin composition for a camera module of the present invention obtained as described above preferably has a melt viscosity of less than 50 Pa ⁇ sec.
- One of the characteristics of the liquid crystalline resin composition for a camera module of the present invention is that the fluidity at the time of melting is high and the moldability is excellent.
- the melt viscosity is a value obtained by a measurement method based on ISO 11443 under 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 .
- the liquid crystalline resin composition for a camera module of the present invention preferably has a deflection temperature under load of 240 ° C. or higher.
- the point which is excellent in heat resistance is also one of the characteristics of the liquid crystalline resin composition for camera modules of this invention.
- For the deflection temperature under load a value measured by a method based on ISO 75-1 or 2 is adopted.
- a camera module component is manufactured using the liquid crystalline resin composition for a camera module. If the resin composition of this invention is used as a raw material, it will become difficult to raise the surface of the components for camera modules. Since the camera module component is ultrasonically cleaned, it is required that the surface is not easily raised even if the ultrasonic cleaning is performed. If the resin composition of the present invention is used, even if the ultrasonic cleaning of camera module parts is performed under stronger conditions, there will be no or almost no dropouts causing dust and the like. Accordingly, after the camera module parts are incorporated into the finished product, the dust generated by raising the surface of the camera module parts hardly affects the quality of the finished product.
- the camera module 1 includes a substrate 10, an optical element 11, a lead wire 12, a lens holder 13, a barrel 14, a lens 15, an IR filter 16, and a guide 17.
- the optical element 11 is disposed on the substrate 10, and the optical element 11 and the substrate 10 are electrically connected by a lead wiring 12.
- the guide 17 is disposed on the substrate 10
- the lens holder 13 is disposed on the guide 17, and the guide 17 and the lens holder 13 cover the optical element 11.
- the lens holder 13 has an opening at the top, and a spiral groove is formed on the wall surface of the opening.
- the barrel 14 has a cylindrical shape, and the lens 15 is held inside the cylindrical shape so as to be substantially horizontal.
- a spiral convex portion is formed on the side wall of one end of the cylinder, and this spiral convex portion and the spiral groove portion formed on the opening wall surface of the lens holder 13 are screwed together,
- the barrel 14 is connected to the lens holder 13.
- An IR filter 16 is disposed at one end of the barrel 14 so as to close one end of the cylindrical barrel 14. As shown in FIG. 1, the IR filter 16 and the lens 15 are arranged substantially in parallel.
- the lens holder 13 includes a magnetic force generated by a coil (not shown) wound around the lens holder 13 and a permanent magnet (not shown) arranged around the coil.
- the distance between the lens 15 and the optical element 11 changes by moving up and down on the guide 17 by the action of.
- the focus of the camera can be adjusted by adjusting this distance.
- the lens holder 13 and / or the barrel 14 which are parts for the camera module can be manufactured using the liquid crystalline resin composition for a camera module of the present invention as a raw material.
- a general liquid crystalline resin composition is not suitable as a raw material for producing these parts.
- a molded body formed by molding a general liquid crystalline resin composition is likely to raise the surface of the molded body because the molecular orientation of the polymer is particularly large at the surface portion, and this raising causes generation of small dust. If this small dust adheres to the lens 15 or the like, the performance of the camera module is degraded.
- the camera module parts such as the lens holder 13 and the barrel 14 are ultrasonically cleaned before being assembled into the camera module 1 for the purpose of removing dust and small dust on the surface.
- the surface of a molded product formed by molding a general liquid crystalline resin composition is easily raised, the surface becomes fluffy when ultrasonically cleaned. Since such a problem arises, the molded object formed by shape
- the focus adjustment is performed on the guide 17 by the action of the magnetic force generated by the coil (not shown) wound around the lens holder 13 and the permanent magnet (not shown) arranged around the coil. It is done by moving up and down.
- the surface of the molded body formed by molding a general liquid crystalline resin composition is likely to be raised as described above, the surface may be peeled off to produce a peeled material. There is a high possibility that the peeled material becomes small dust and adheres to the lens 15 or the like, thereby reducing the performance of the camera module.
- the liquid crystalline resin composition for a camera module of the present invention is formed into a molded body, Since the surface state of the molded body has been improved so that even if the molded body is ultrasonically cleaned, the problem of raising the hair hardly occurs, it can be preferably used as a raw material for the lens holder 13 and / or the barrel 14.
- examples of the material for the guide 17 include materials other than the liquid crystalline resin composition for a camera module of the present invention. Etc.
- the stirring torque reached a predetermined value, nitrogen was introduced and the pressure was changed from the reduced pressure state to the normal pressure state, the polymer was discharged from the lower part of the polymerization vessel, and the strands were pelletized to obtain pellets.
- the obtained pellets were heat-treated at 300 ° C. for 2 hours under a nitrogen stream to obtain the target polymer.
- the obtained polymer had a melting point of 334 ° C. and a melt viscosity of 14.0 Pa ⁇ s.
- the melt viscosity of the polymer was measured in the same manner as the melt viscosity measurement method described later.
- melt viscosity of the liquid crystalline resin compositions for camera modules of Examples and Comparative Examples was measured using the pellets. Specifically, the apparent melt viscosity under conditions of a cylinder temperature of 350 ° C. and a shear rate of 1000 sec ⁇ 1 was measured with a capillary rheometer (Capillograph 1D manufactured by Toyo Seiki: piston diameter 10 mm) in accordance with ISO 11443. For the measurement, an orifice having an inner diameter of 1 mm and a length of 20 mm was used. The results are shown in Tables 1 and 2.
- ⁇ Load deflection temperature> The pellets of Examples and Comparative Examples were molded under the following molding conditions using a molding machine (“SE100DU” manufactured by Sumitomo Heavy Industries, Ltd.) to obtain test specimens (4 mm ⁇ 10 mm ⁇ 80 mm). . Using this test piece, the deflection temperature under load was measured by a method in conformity with ISO 75-1,2. Note that 1.8 MPa was used as the bending stress. The results are shown in Tables 1 and 2. ⁇ Molding condition ⁇ Cylinder temperature: 350 ° C Mold temperature: 80 °C Back pressure: 2.0MPa Injection speed: 33mm / sec
- the molded body produced using the pellets of the examples had high mechanical strength such as bending strength and impact resistance. Therefore, by molding the pellets of the embodiment, the mechanical strength is high. Specifically, for example, a camera that is less likely to break due to an impact at the time of a collision with a non-contact reader or an impact of a drive. Module parts can be manufactured.
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Abstract
Description
(B)繊維状ウォラストナイト、
(C)エポキシ基含有共重合体、及び
(D)板状充填剤
を含有し、
(A)成分の含有量が55~95.5質量%、(B)成分の含有量が2.5~25質量%、(C)成分の含有量が1.0~4.5質量%、(D)成分の含有量が10~35質量%、(B)成分と(D)成分との合計の含有量が20~37.5質量%であるカメラモジュール用液晶性樹脂組成物。 (1) (A) Liquid crystalline resin,
(B) Fibrous wollastonite,
(C) an epoxy group-containing copolymer, and (D) a plate-like filler,
The component (A) content is 55 to 95.5% by mass, the component (B) content is 2.5 to 25% by mass, the component (C) content is 1.0 to 4.5% by mass, A liquid crystalline resin composition for a camera module, wherein the content of the component (D) is 10 to 35% by mass, and the total content of the component (B) and the component (D) is 20 to 37.5% by mass.
本発明のカメラモジュール用液晶性樹脂組成物は、(A)液晶性樹脂、(B)繊維状ウォラストナイト、(C)エポキシ基含有共重合体、及び(D)板状充填剤を含有する。 <Liquid crystal resin composition for camera module>
The liquid crystalline resin composition for a camera module of the present invention contains (A) liquid crystalline resin, (B) fibrous wollastonite, (C) an epoxy group-containing copolymer, and (D) a plate-like filler. .
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。 [(A) Liquid crystalline resin]
The (A) liquid crystalline resin used in the present invention refers to a melt processable polymer having a property capable of forming an optically anisotropic molten phase. The property 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 a molten sample placed on a Leitz hot stage under a nitrogen atmosphere at a magnification of 40 times. When the liquid crystalline polymer applicable to the present invention is inspected between crossed polarizers, the polarized light is normally transmitted even in the molten stationary state, and optically anisotropic.
(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、(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;
(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;
(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、(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。 More specifically,
(1) A polyester mainly composed of repeating units derived from one or more aromatic hydroxycarboxylic acids and derivatives thereof;
(2) Mainly (a) a repeating unit derived from one or more of aromatic hydroxycarboxylic acids and derivatives thereof, and (b) one of aromatic dicarboxylic acids, alicyclic dicarboxylic acids, and derivatives thereof Or a polyester comprising a repeating unit derived from two or more and (c) a repeating unit derived from at least one or more of aromatic diol, alicyclic diol, aliphatic diol, and derivatives thereof;
(3) a repeating unit mainly derived from (a) one or more of an aromatic hydroxycarboxylic acid and a derivative thereof; and (b) one or two of an aromatic hydroxyamine, an aromatic diamine, and a derivative thereof. A polyesteramide comprising a repeating unit derived from at least one species and (c) a repeating unit derived from one or more of aromatic dicarboxylic acid, alicyclic dicarboxylic acid, and derivatives thereof;
(4) a repeating unit mainly derived from (a) one or more of aromatic hydroxycarboxylic acids and derivatives thereof; and (b) one or two of aromatic hydroxyamines, aromatic diamines and derivatives thereof. A repeating unit derived from more than one species, (c) a repeating unit derived from one or more of aromatic dicarboxylic acid, alicyclic dicarboxylic acid and derivatives thereof, and (d) aromatic diol, alicyclic And polyester amides composed of a repeating unit derived from at least one or more of an aliphatic diol, an aliphatic diol, and derivatives thereof. Furthermore, you may use a molecular weight regulator together with said structural component as needed.
本明細書において、(B)繊維状ウォラストナイトとは、アスペクト比、即ち、平均繊維長/平均繊維径の値が8以上であるウォラストナイトをいう。上記アスペクト比は、成形体表面の起毛抑制効果等の観点から、好ましくは10~25であり、より好ましくは15~20である。なお、本明細書において、アスペクト比が8未満であるウォラストナイトを粒状ウォラストナイトという。 [(B) Fibrous wollastonite]
In the present specification, (B) fibrous wollastonite means wollastonite having an aspect ratio, that is, an average fiber length / average fiber diameter value of 8 or more. The aspect ratio is preferably 10 to 25 and more preferably 15 to 20 from the viewpoint of the effect of suppressing the raising of the surface of the molded body. In the present specification, wollastonite having an aspect ratio of less than 8 is referred to as granular wollastonite.
(C)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。(C)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、(C1)エポキシ基含有オレフィン系共重合体及び(C2)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。(C)成分をカメラモジュール用液晶性樹脂組成物に配合させることが、当該組成物を成形してなる成形体を超音波洗浄したときの、成形体表面の起毛を抑えることに寄与する。
起毛を抑える理由については明確になっているわけではないが、ある一定量配合させることにより、成形体表面状態を変化させ、その変化が起毛を抑えることに寄与していると考えられる。 [(C) Epoxy group-containing copolymer]
(C) The epoxy group-containing copolymer can be used alone or in combination of two or more. The (C) epoxy group-containing copolymer is not particularly limited. For example, at least selected from the group consisting of (C1) an epoxy group-containing olefin copolymer and (C2) an epoxy group-containing styrene copolymer. One type is mentioned. Mixing the component (C) with the liquid crystalline resin composition for a camera module contributes to suppressing raising of the surface of the molded product when the molded product obtained by molding the composition is subjected to ultrasonic cleaning.
The reason for suppressing the raising is not clarified, but it is considered that by adding a certain amount, the surface state of the molded body is changed, and the change contributes to suppressing the raising.
(D)板状充填剤は、平均粒子径が20~50μmであることが好ましい。上記平均粒子径が20μm以上であると、カメラモジュールとして必要な機械強度及び荷重たわみ温度が確保されやすく、成形体のそり変形抑制効果が高くなりやすい。上記平均粒子径が50μm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。好ましい上記平均粒子径は23~30μmである。なお、本明細書において、平均粒子径としては、レーザ回折/散乱式粒度分布測定法で測定した値を採用する。 [(D) Plate-like filler]
(D) The plate-like filler preferably has an average particle size of 20 to 50 μm. When the average particle diameter is 20 μm or more, the mechanical strength and the deflection temperature under load necessary for the camera module are easily secured, and the warpage deformation suppressing effect of the molded body is likely to increase. When the average particle size is 50 μm or less, the effect of suppressing napping on the surface of the molded body tends to increase. The average particle diameter is preferably 23 to 30 μm. In this specification, the value measured by the laser diffraction / scattering particle size distribution measurement method is adopted as the average particle size.
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。 [(E) Carbon black]
The carbon black (E) used as an optional component in the present invention is not particularly limited as long as it is generally available for use in resin coloring. Normally, (E) carbon black contains a lump formed by agglomeration of primary particles, but the resin composition of the present invention is molded unless a large amount of lump having a size of 50 μm or more is contained. Many bumps (fine bumpy projections (fine irregularities) in which carbon black is aggregated) hardly occur on the surface of the molded body. When the content of particles having a lump particle diameter of 50 μm or more is 20 ppm or less, the effect of suppressing napping on the surface of the molded product tends to be high. A preferable content rate is 5 ppm or less.
本発明のカメラモジュール用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、離型剤、結晶化促進剤、結晶核剤等も要求性能に応じ適宜添加することができる。 [Other ingredients]
The liquid crystalline resin composition for a camera module of the present invention includes other polymers, other fillers, known substances generally added to synthetic resins, that is, antioxidants, as long as the effects of the present invention are not impaired. Stabilizers such as UV absorbers, antistatic agents, flame retardants, colorants such as dyes and pigments, lubricants, mold release agents, crystallization accelerators, crystal nucleating agents, etc. may be added as appropriate according to the required performance. it can.
本発明のカメラモジュール用樹脂組成物の調製は特に限定されない。例えば、上記(A)、(B)、(C)、及び(D)成分を配合して、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、カメラモジュール用液晶性樹脂組成物の調製が行われる。 [Preparation of liquid crystalline resin composition for camera module]
The preparation of the resin composition for a camera module of the present invention is not particularly limited. For example, by blending the above components (A), (B), (C), and (D), and melt-kneading these using a single screw or twin screw extruder, a liquid crystalline resin for a camera module Preparation of the composition takes place.
本発明のカメラモジュール用液晶性樹脂組成物中の(B)成分の形状と、配合される前の(B)成分の形状とは異なる。上述の(B)成分の形状は配合される前の形状である。配合される前の形状が上述の通りであれば、表面が起毛しにくいカメラモジュール用部品が得られる。 [Liquid crystalline resin composition for camera modules]
The shape of the component (B) in the liquid crystalline resin composition for a camera module of the present invention is different from the shape of the component (B) before blending. The shape of the above component (B) is the shape before blending. If the shape before blending is as described above, a camera module component that is less prone to raising the surface can be obtained.
上記カメラモジュール用液晶性樹脂組成物を用いて、カメラモジュール用部品を製造する。本発明の樹脂組成物を原料として用いれば、カメラモジュール用部品の表面が起毛しにくくなる。カメラモジュール用部品は、超音波洗浄されるため、超音波洗浄されても表面が起毛しにくいことが求められる。本発明の樹脂組成物を用いれば、カメラモジュール用部品の超音波洗浄をより強い条件で行っても、ゴミ等の原因となる脱落物が生じないか、ほとんど生じない。したがって、カメラモジュール用部品が完成品に組み込まれた後に、このカメラモジュール用部品の表面が起毛することにより生じるゴミで、完成品の品質に影響を与えることはほとんど無い。 <Camera module parts and camera module>
A camera module component is manufactured using the liquid crystalline resin composition for a camera module. If the resin composition of this invention is used as a raw material, it will become difficult to raise the surface of the components for camera modules. Since the camera module component is ultrasonically cleaned, it is required that the surface is not easily raised even if the ultrasonic cleaning is performed. If the resin composition of the present invention is used, even if the ultrasonic cleaning of camera module parts is performed under stronger conditions, there will be no or almost no dropouts causing dust and the like. Accordingly, after the camera module parts are incorporated into the finished product, the dust generated by raising the surface of the camera module parts hardly affects the quality of the finished product.
・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334℃、溶融粘度は14.0Pa・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;188.4g(60モル%)
(II)2-ヒドロキシ-6-ナフトエ酸;21.4g(5モル%)
(III)テレフタル酸;66.8g(17.7モル%)
(IV)4,4’-ジヒドロキシビフェニル;52.2g(12.3モル%)
(V)4-アセトキシアミノフェノール;17.2g(5モル%)
金属触媒(酢酸カリウム触媒);15mg
アシル化剤(無水酢酸);226.2g <Liquid crystal resin>
-Liquid crystalline polyesteramide resin The following raw materials were charged in a polymerization vessel, and then the temperature of the reaction system was raised to 140 ° C and reacted at 140 ° C for 1 hour. Thereafter, the temperature is further raised to 340 ° C. over 4.5 hours, and then the pressure is reduced to 10 Torr (ie, 1330 Pa) over 15 minutes while acetic acid, excess acetic anhydride, and other low-boiling components are distilled off. Melt polymerization was performed. After the stirring torque reached a predetermined value, nitrogen was introduced and the pressure was changed from the reduced pressure state to the normal pressure state, the polymer was discharged from the lower part of the polymerization vessel, and the strands were pelletized to obtain pellets. The obtained pellets were heat-treated at 300 ° C. for 2 hours under a nitrogen stream to obtain the target polymer. The obtained polymer had a melting point of 334 ° C. and a melt viscosity of 14.0 Pa · s. The melt viscosity of the polymer was measured in the same manner as the melt viscosity measurement method described later.
(I) 4-hydroxybenzoic acid; 188.4 g (60 mol%)
(II) 2-hydroxy-6-naphthoic acid; 21.4 g (5 mol%)
(III) terephthalic acid; 66.8 g (17.7 mol%)
(IV) 4,4′-dihydroxybiphenyl; 52.2 g (12.3 mol%)
(V) 4-acetoxyaminophenol; 17.2 g (5 mol%)
Metal catalyst (potassium acetate catalyst); 15 mg
Acylating agent (acetic anhydride); 226.2 g
・繊維状ウォラストナイト:NYGLOS 8(NYCO Materials社製、アスペクト比17、平均繊維長136μm、平均繊維径8μm)
・粒状ウォラストナイト:NYAD 325(NYCO Materials社製、アスペクト比5、平均繊維長50μm、平均繊維径5μm)
・ガラス繊維:PF70E-001(日東紡(株)製、ミルドファイバー、平均繊維径10μm、平均繊維長70μm)
・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%)
・エポキシ基不含有共重合体:タフテックM1913(旭化成(株)製、無水マレイン酸変性水添スチレン-エチレン-ブタジエン-スチレンブロック共重合体)
・板状充填剤1:AB-25S((株)山口雲母工業製、マイカ、平均粒子径24μm)
・板状充填剤2:クラウンタルクPP(松村産業(株)製、タルク、平均粒子径12.8μm、平均アスペクト比6)
・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) <Material other than liquid crystalline resin>
-Fibrous wollastonite: NYGLOS 8 (manufactured by NYCO Materials,
Granular wollastonite: NYAD 325 (manufactured by NYCO Materials, aspect ratio 5, average fiber length 50 μm, average fiber diameter 5 μm)
Glass fiber: PF70E-001 (manufactured by Nittobo Co., Ltd., milled fiber, average fiber diameter 10 μm, average fiber length 70 μm)
Epoxy group-containing olefin copolymer: Bond First 2C (manufactured by Sumitomo Chemical Co., Ltd., ethylene-glycidyl methacrylate copolymer, glycidyl methacrylate content 6 mass%)
-Epoxy group-free copolymer: Tuftec M1913 (manufactured by Asahi Kasei Corporation, maleic anhydride-modified hydrogenated styrene-ethylene-butadiene-styrene block copolymer)
・ Plate-shaped filler 1: AB-25S (manufactured by Yamaguchi Mica Kogyo Co., Ltd., mica, average particle size 24 μm)
Plate filler 2: Crown talc PP (manufactured by Matsumura Sangyo Co., Ltd., talc, average particle size 12.8 μm, average aspect ratio 6)
Carbon black: VULCAN XC305 (manufactured by Cabot Japan Co., Ltd., average particle size 20 nm, ratio of particles having a particle size of 50 μm or more is 20 ppm or less)
上記成分を、表1又は表2に示す割合で二軸押出機((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、カメラモジュール用液晶性樹脂組成物ペレットを得た。 <Manufacture of liquid crystalline resin composition for camera module>
The above components are melt kneaded at a cylinder temperature of 350 ° C. using a twin-screw extruder (TEX30α type, manufactured by Nippon Steel Works) at the ratio shown in Table 1 or Table 2, and a liquid crystalline resin composition for a camera module. Pellets were obtained.
実施例及び比較例のカメラモジュール用液晶性樹脂組成物の溶融粘度を、上記ペレットを用いて測定した。具体的には、キャピラリー式レオメーター(東洋精機製キャピログラフ1D:ピストン径10mm)により、シリンダー温度350℃、せん断速度1000sec-1の条件での見かけの溶融粘度をISO 11443に準拠して測定した。測定には、内径1mm、長さ20mmのオリフィスを用いた。結果を表1及び表2に示す。 <Melt viscosity>
The melt viscosity of the liquid crystalline resin compositions for camera modules of Examples and Comparative Examples was measured using the pellets. Specifically, the apparent melt viscosity under conditions of a cylinder temperature of 350 ° C. and a shear rate of 1000 sec −1 was measured with a capillary rheometer (Capillograph 1D manufactured by Toyo Seiki: piston diameter 10 mm) in accordance with ISO 11443. For the measurement, an orifice having an inner diameter of 1 mm and a length of 20 mm was used. The results are shown in Tables 1 and 2.
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(4mm×10mm×80mm)を得た。この試験片を用いて、ISO 75-1,2に準拠した方法で荷重たわみ温度を測定した。なお、曲げ応力としては、1.8MPaを用いた。結果を表1及び表2に示す。
〔成形条件〕
シリンダー温度: 350℃
金型温度: 80℃
背圧: 2.0MPa
射出速度: 33mm/sec <Load deflection temperature>
The pellets of Examples and Comparative Examples were molded under the following molding conditions using a molding machine (“SE100DU” manufactured by Sumitomo Heavy Industries, Ltd.) to obtain test specimens (4 mm × 10 mm × 80 mm). . Using this test piece, the deflection temperature under load was measured by a method in conformity with ISO 75-1,2. Note that 1.8 MPa was used as the bending stress. The results are shown in Tables 1 and 2.
〔Molding condition〕
Cylinder temperature: 350 ° C
Mold temperature: 80 ℃
Back pressure: 2.0MPa
Injection speed: 33mm / 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、130mm×13mm×0.8mmの曲げ試験片を作製した。この試験片を用いて、ASTM D790に準拠し、曲げ強度、曲げ弾性率、及び破断歪を測定した。結果を表1及び表2に示す。
〔成形条件〕
シリンダー温度: 350℃
金型温度: 90℃
射出速度: 33mm/sec
保圧: 50MPa <Bending test>
The pellets of Examples and Comparative Examples were molded under the following molding conditions using a molding machine (“SE100DU” manufactured by Sumitomo Heavy Industries, Ltd.) to produce a bending test piece of 130 mm × 13 mm × 0.8 mm. . Using this test piece, bending strength, bending elastic modulus, and breaking strain were measured in accordance with ASTM D790. The results are shown in Tables 1 and 2.
〔Molding condition〕
Cylinder temperature: 350 ° C
Mold temperature: 90 ℃
Injection speed: 33mm / sec
Holding pressure: 50 MPa
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、以下の成形条件で測定用試験片(4mm×10mm×80mm)に成形した。この試験片を用いて、ISO 179-1に準拠した方法でシャルピー衝撃強度を測定した。結果を表1及び表2に示す。
〔成形条件〕
シリンダー温度: 350℃
金型温度: 80℃
背圧: 2.0MPa
射出速度: 33mm/sec <Charpy impact test>
The pellets of Examples and Comparative Examples were molded into test specimens (4 mm × 10 mm × 80 mm) under the following molding conditions using a molding machine (“SE100DU” manufactured by Sumitomo Heavy Industries, Ltd.). Using this test piece, Charpy impact strength was measured by a method based on ISO 179-1. The results are shown in Tables 1 and 2.
〔Molding condition〕
Cylinder temperature: 350 ° C
Mold temperature: 80 ℃
Back pressure: 2.0MPa
Injection speed: 33mm / 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 「SE-100DU」)を用いて、以下の成形条件で成形し、80mm×80mm×1mmの平板状試験片を5枚作製した。1枚目の平板状試験片を水平面に静置し、(株)ミツトヨ製のCNC画像測定機(型式:QVBHU404-PRO1F)を用いて、上記平板状試験片上の9箇所において、上記水平面からの高さを測定し、得られた測定値から平均の高さを算出した。高さを測定した位置は、平板状試験片の主平面上に、この主平面の各辺からの距離が3mmとなるように、一辺が74mmの正方形を置いたときに、この正方形の各頂点、この正方形の各辺の中点、及びこの正方形の2本の対角線の交点に該当する位置である。上記水平面からの高さが上記平均の高さと同一であり、上記水平面と平行な面を基準面とした。上記9箇所で測定された高さの中から、基準面からの最大高さと最小高さとを選択し、両者の差を算出した。同様にして、他の4枚の平板状試験片についても上記の差を算出し、得られた5個の値を平均して、平面度の値とした。結果を表1及び表2に示す。
〔成形条件〕
シリンダー温度: 350℃
金型温度: 80℃
射出速度: 33mm/sec
保圧: 60MPa <Flatness>
The pellets of Examples and Comparative Examples were molded under the following molding conditions using a molding machine (“SE-100DU” manufactured by Sumitomo Heavy Industries, Ltd.), and 5 flat plate test pieces of 80 mm × 80 mm × 1 mm were formed. A sheet was produced. The first flat plate-shaped test piece was allowed to stand on a horizontal plane, and the CNC image measuring machine (model: QVBHU404-PRO1F) manufactured by Mitutoyo Co., Ltd. was used at nine locations on the flat plate-shaped test piece from the horizontal plane. The height was measured, and the average height was calculated from the obtained measurement values. The position where the height was measured is that each vertex of this square is placed on a principal plane of a flat specimen when a square with a side of 74 mm is placed so that the distance from each side of the principal plane is 3 mm. , A position corresponding to the midpoint of each side of the square and the intersection of two diagonal lines of the square. The height from the horizontal plane was the same as the average height, and a plane parallel to the horizontal plane was used as a reference plane. The maximum height and the minimum height from the reference plane were selected from the heights measured at the nine locations, and the difference between the two was calculated. Similarly, the above difference was calculated for the other four flat test pieces, and the obtained five values were averaged to obtain the flatness value. The results are shown in Tables 1 and 2.
〔Molding condition〕
Cylinder temperature: 350 ° C
Mold temperature: 80 ℃
Injection speed: 33mm / sec
Holding pressure: 60 MPa
実施例及び比較例のペレットを、成形機(住友重機械工業社製 「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: 90℃
射出速度: 80mm/sec
〔評価〕
上記試験片を3分間、室温の水中で超音波洗浄機(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及び表2に示す。 <Number of dust generation>
The pellets of Examples and Comparative Examples were molded under the following molding conditions using a molding machine (“SE30DUZ” manufactured by Sumitomo Heavy Industries, Ltd.) to obtain a molded body of 12.5 mm × 120 mm × 0.8 mm. This molded body was used as a test piece.
〔Molding condition〕
Cylinder temperature: 350 ° C
Mold temperature: 90 ℃
Injection speed: 80mm / sec
[Evaluation]
The test piece was subjected to an ultrasonic cleaner (output 300 W, frequency 45 kHz) in water at room temperature for 3 minutes. Thereafter, the number of particles of 2 μm or more present in the water was measured with a particle counter (RION Co., Ltd., fine particle counter KL-11A (PARTICLECOUNTER)) and evaluated as the number of dust generation. The results are shown in Tables 1 and 2.
10 基板
11 光学素子
12 リード配線
13 レンズホルダー
14 バレル
15 レンズ
16 IRフィルター
17 ガイド DESCRIPTION OF SYMBOLS 1 Camera module 10 Board |
Claims (4)
- (A)液晶性樹脂、
(B)繊維状ウォラストナイト、
(C)エポキシ基含有共重合体、及び
(D)板状充填剤
を含有し、
(A)成分の含有量が55~95.5質量%、(B)成分の含有量が2.5~25質量%、(C)成分の含有量が1.0~4.5質量%、(D)成分の含有量が10~35質量%、(B)成分と(D)成分との合計の含有量が20~37.5質量%であるカメラモジュール用液晶性樹脂組成物。 (A) liquid crystalline resin,
(B) Fibrous wollastonite,
(C) an epoxy group-containing copolymer, and (D) a plate-like filler,
The component (A) content is 55 to 95.5% by mass, the component (B) content is 2.5 to 25% by mass, the component (C) content is 1.0 to 4.5% by mass, A liquid crystalline resin composition for a camera module, wherein the content of the component (D) is 10 to 35% by mass, and the total content of the component (B) and the component (D) is 20 to 37.5% by mass. - 前記(C)エポキシ基含有共重合体は、(C1)エポキシ基含有オレフィン系共重合体及び(C2)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種である請求項1に記載の組成物。 2. The (C) epoxy group-containing copolymer is at least one selected from the group consisting of (C1) an epoxy group-containing olefin copolymer and (C2) an epoxy group-containing styrene copolymer. A composition according to 1.
- 請求項1又は2に記載の組成物からなるカメラモジュール用部品。 A camera module part comprising the composition according to claim 1 or 2.
- 請求項3に記載の部品を備えるカメラモジュール。 A camera module comprising the component according to claim 3.
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CN201680050644.9A CN107924039B (en) | 2015-09-01 | 2016-08-10 | Liquid crystalline resin composition for camera module and camera module using same |
KR1020187008057A KR102081231B1 (en) | 2015-09-01 | 2016-08-10 | Liquid Crystal Resin Composition for Camera Module and Camera Module Using the Same |
JP2017537705A JP6581659B2 (en) | 2015-09-01 | 2016-08-10 | Liquid crystalline resin composition for camera module and camera module using the same |
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JP (1) | JP6581659B2 (en) |
KR (1) | KR102081231B1 (en) |
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KR20180044343A (en) | 2018-05-02 |
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TWI689550B (en) | 2020-04-01 |
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JPWO2017038421A1 (en) | 2018-07-12 |
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