CN104822775B - Camera module use liquid crystalline resin composition and use its camera module - Google Patents
Camera module use liquid crystalline resin composition and use its camera module Download PDFInfo
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- CN104822775B CN104822775B CN201380062895.5A CN201380062895A CN104822775B CN 104822775 B CN104822775 B CN 104822775B CN 201380062895 A CN201380062895 A CN 201380062895A CN 104822775 B CN104822775 B CN 104822775B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/346—Clay
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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
- C08K7/04—Fibres or whiskers inorganic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C08L23/0869—Acids or derivatives thereof
- C08L23/0884—Epoxide containing esters
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- 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
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/38—Polymers
- C09K19/3804—Polymers with mesogenic groups in the main chain
- C09K19/3809—Polyesters; Polyester derivatives, e.g. polyamides
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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
- C08K2201/00—Specific properties of additives
- C08K2201/001—Conductive additives
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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
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/08—Copolymers of styrene
- C08L25/14—Copolymers of styrene with unsaturated esters
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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
Abstract
Camera module use liquid crystalline resin composition is provided, it, which is used to manufacturing surface, is not easy to fluff, is not easy powered camera module use part.A kind of resin combination, it is contained with specified quantitative：(A) liquid-crystalline resin；(B) non-conductive filler, it is at least one kind of in the non-conductive filler of (B1) threadiness and the non-conductive filler of (B2) Non-fibrous；(C) copolymer, it is at least one kind of in (C1) olefin copolymer and (C2) styrene based copolymer；And (D) conductive filler agent, it includes (D1) fibrous conductive filler agent and the conductive filler agent of (D2) Non-fibrous, (B1) composition, (B2) composition, (C1) composition, (C2) composition, (D1) composition and (D2) composition are made up of specific composition, and the specific insulation of resin combination is 1 × 104~1 × 1014Ω·cm。
Description
Technical field
The present invention relates to camera module use liquid crystalline resin composition and use its camera module.
Background technology
For the liquid-crystalline resin using liquid crystalline polyester resin as representative, it is strong that it well-balanced possesses excellent machinery
Degree, heat resistance, chemical proofing, electrical property etc., also with excellent dimensional stability, therefore it is widely used as high function work
Engineering plastics.Recently, liquid-crystalline resin is effectively used for precision instrument part using these features.
In the case of optical instrument in precision instrument, especially with lens etc, slight dirt (rubbish),
Dust etc. can also impact to instrument performance.For example, for part that camera module uses in optical instrument like that and
Speech, when small dirt, oil, dust are attached to lens, the optical characteristics of camera module significantly reduces.In order to prevent so
Optical characteristics reduction, generally will form camera module part (hereinafter sometimes referred to " camera module use part ".)
Ultrasonic wave cleaning is carried out before assembling, to remove in small dirt, oil, dust of surface attachment etc..
As described above, by the formed body that liquid crystalline resin composition is molded with because high molecular molecularly oriented is on surface
Part is especially big, thus formed body surface is easily peeled off, therefore, when carrying out ultrasonic wave cleaning to the formed body, sur-face peeling and
The fluffiness for being referred to as fluffing is produced, the fluffing part that the fluffing forms turns into the reason for small dirt occurs.
Therefore, when liquid crystalline resin composition being used as into the raw material of camera module use part, even if using to formed body
Special liquid crystalline resin composition as formed body wildness will not also be made by carrying out ultrasonic wave cleaning.As special liquid
Crystalline substance resin combination, disclose a kind of camera module use liquid crystal for including liquid-crystalline resin, specific talcum and carbon black
Property resin combination (with reference to patent document 1).
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2009-242453 publications
The content of the invention
Problems to be solved by the invention
But according to the research of the present inventor etc., the camera module use liquid-crystalline resin combination described in patent document 1
The fluffing suppression on the formed body surface of thing is simultaneously insufficient, seeks the photograph for being less susceptible to the formed body of fluffing for being manufactured body surface face
Camera model liquid crystalline resin composition.
However, in the camera module, it is wound in by utilizing lens holders produced by the coil of lens holders
Magnetic force and the effect that is configured between the permanent magnet around coil and the guide member in the base as lens holders is enterprising
Row is moved up and down to be directed at the focus of lens.Wherein, generally, lens holders are made up of the material comprising liquid-crystalline resin, phase
For this, guide member is by the resin in addition to liquid-crystalline resin, such as the material composition comprising nylon.Therefore generally,
Lens holders and guide member are made up of foreign material, and therefore, lens holders are easy when being moved up and down on guide member
Produce electrostatic, the reason for turning into the malfunction of lens holders.
The present invention completes to solve above-mentioned problem, its object is to, there is provided be not easy to fluff for manufacturing surface,
It is not easy the camera module use liquid crystalline resin composition of powered camera module use part.
The solution used to solve the problem
Further investigation has been repeated in order to solve above-mentioned problem in the present inventor etc..Its result is found：By using with
Special ratios contain liquid-crystalline resin, specific non-conductive filler, specific copolymer and specific conductive filler agent
Camera module use liquid crystalline resin composition, above-mentioned problem is can solve the problem that, so as to complete the present invention.More particularly,
The present invention provides following scheme.
(1) a kind of camera module use liquid crystalline resin composition, it contains：(A) liquid-crystalline resin；(B) it is non-conductive
Filler, it is selected from least one kind of in the non-conductive filler of (B1) threadiness and the non-conductive filler of (B2) Non-fibrous；
(C) copolymer, it is selected from least one kind of and (D) electric conductivity in (C1) olefin copolymer and (C2) styrene based copolymer
Filler, it includes (D1) fibrous conductive filler agent and the conductive filler agent of (D2) Non-fibrous, and the content of (A) composition is
55~91 mass %, the content of (B) composition are 5~20 mass %, the content of (C) composition is 2~10 mass %, (D1) composition
Content is 1~5 mass %, the content of (D2) composition is 1~15 mass %, and the non-conductive filler of foregoing (B1) threadiness is put down
Equal fibre diameter is less than 1.0 μm, and average fiber length is 5~50 μm, the non-conductive filler of foregoing (B2) Non-fibrous
Be selected from average grain diameter be less than 50 μm, at least one kind of, foregoing (C1) alkene in sheet filler and particulate fillers
Based copolymer is made up of alpha-olefin and α, the ethylene oxidic ester of beta-unsaturated acid, and foregoing (C2) styrene based copolymer is by styrene
Class and α, the ethylene oxidic ester of beta-unsaturated acid are formed, and the average fiber length of foregoing (D1) fibrous conductive filler agent is 50
More than μm, foregoing (D2) Non-fibrous conductive filler agent selected from average grain diameter be 20nm~50 μm, sheet filler with
And it is at least one kind of in particulate fillers, the specific insulation of resin combination is 1 × 104~1 × 1014Ω·cm。
(2) a kind of camera module use part, it is as the camera module use liquid crystalline resin composition shape described in (1)
Into.
(3) the camera module use part according to (2), it is lens holders.
(4) a kind of camera module, it possesses lens holders and guide member, and the guide member is protected as aforesaid lens
The base of gripping member, aforesaid lens keeper are formed as the camera module use liquid crystalline resin composition described in (1), foregoing guiding
Part is formed by the material in addition to foregoing camera module use liquid crystalline resin composition.
The effect of invention
If manufacture camera module use portion using the camera module use liquid crystalline resin composition of the present invention as raw material
Part, then it can obtain surface and be not easy to fluff, be not easy powered camera module use part.
Brief description of the drawings
Fig. 1 is the sectional view for schematically showing common camera module.
Embodiment
Hereinafter, illustrated for embodiments of the present invention.It should be noted that the present invention is not limited to following reality
Apply mode.
<Camera module use liquid crystalline resin composition>
The camera module use liquid crystalline resin composition of the present invention contains (A) liquid-crystalline resin, (B) non-conductive filling
Agent, (C) copolymer and (D) conductive filler agent.
[(A) liquid-crystalline resin]
(A) liquid-crystalline resin used in the present invention refers to the molten of the property that can form optical anisotropy melting behaviors
Melt processability polymer.The property of anisotropy melting behaviors can be come by using the usual polarisation inspection technique of cross-polarization piece
Confirm.More specifically, the confirmation of anisotropy melting behaviors can by using Leitz petrographic microscopes in a nitrogen atmosphere with
40 times of multiplying power is observed to implement the melting sample being placed in Leitz thermal station.Adaptable liquid crystal in the present invention
Property polymer when being checked between cross-polarization piece, that is, be at melting inactive state, polarised light also generally passes through, in optics
On show anisotropy.
As the species of (A) liquid-crystalline resin as described above, it is not particularly limited, preferably aromatic polyester or fragrance
Adoption esteramides.In addition, the polyester in same strand locally comprising aromatic polyester or aromatic polyester acid amides is also at it
In the range of.It is preferred that using when they are dissolved in Pentafluorophenol at 60 DEG C with 0.1 weight % concentration has preferably at least
About 2.0dl/g, further preferred 2.0~10.0dl/g log viscosities (I.V.) resin.
For the aromatic polyester or aromatic polyester acid amides as adaptable (A) liquid-crystalline resin in the present invention,
Particularly preferably have by the group being made up of aromatic hydroxy-carboxylic, aromatic hydroxyl amine, aromatic diamine extremely
Aromatic polyester, aromatic polyester acid amides of the repeat unit in few more than a kind compound institute source as constituent.
More particularly, can enumerate：
(1) mainly by the one kind or two or more polyester formed in aromatic hydroxy-carboxylic and its derivative；
(2) mainly by one kind or two or more and (b) aromatic series dicarboxyl in (a) aromatic hydroxy-carboxylic and its derivative
One kind or two or more and (c) aromatic diol, alicyclic diol, fat in acid, alicyclic dicarboxylic acid and their derivative
At least one kind of or two or more formation polyester in fat race glycol and their derivative；
(3) mainly by one kind or two or more and (b) aromatic hydroxyl in (a) aromatic hydroxy-carboxylic and its derivative
One kind or two or more and (c) aromatic dicarboxylic acid, alicyclic dicarboxylic acid in amine, aromatic diamine and their derivative with
And the polyesteramide of the one kind or two or more formation in their derivative；
(4) mainly by one kind or two or more and (b) aromatic hydroxyl in (a) aromatic hydroxy-carboxylic and its derivative
One kind or two or more and (c) aromatic dicarboxylic acid, alicyclic dicarboxylic acid in amine, aromatic diamine and their derivative with
And one kind or two or more and (d) aromatic diol in their derivative, alicyclic diol, aliphatic diol and they
At least one kind of or two or more polyesteramide formed in derivative etc..And then can also in above-mentioned constituent basis
Need that molecular weight regulator is applied in combination.
As the preference for forming the particular compound of adaptable (A) liquid-crystalline resin in the present invention, can include：
The aromatic hydroxy-carboxylics such as P-hydroxybenzoic acid, 6-Hydroxy-2-naphthoic acid；2,6- dihydroxy naphthlenes, 1,4- dihydroxy naphthlenes, 4,4 '-
Dihydroxybiphenyl, hydroquinones, resorcinol, the compound shown in following logical formula (I)s and the change shown in following logical formula (II)s
The aromatic diols such as compound；Terephthalic acid (TPA), M-phthalic acid, 4,4 '-diphenyldicarboxylic acid, 2,6 naphthalene dicarboxylic acid and under
State the aromatic dicarboxylic acids such as the compound shown in logical formula (III)；The aromatic amines such as para-aminophenol, p-phenylenediamine.
(X：Selected from alkylidene (C1~C4), alkylidene radical ,-O- ,-SO- ,-SO2-, the group in-S- and-CO-)
(Y：Selected from-(CH2)n- (n=1~4) and-O (CH2)nGroup in O- (n=1~4).)
Preparing for (A) liquid-crystalline resin used in the present invention can be by (or the mixing of monomer of above-mentioned monomeric compound
Thing) carried out according to known methods using direct polymerization method, ester-interchange method, can generally it use melt phase polycondensation, slurry gather
It is legal etc..Above-claimed cpd class with ester Forming ability can be used to polymerize in the form of script, alternatively, it is also possible to poly-
The previous stage of conjunction is the derivative with the ester Forming ability by precursor modification.When they polymerize, various urge can be used
Agent, as representational catalyst, dialkyltin, diaryl tin oxide, titanium dioxide, alkoxytitanium silicon can be included
Barbiturates, Titanium alkoxides class, the alkali metal salt of carboxylic acid and alkaline-earth metal salt, BF3Etc lewis acid etc..The use of catalyst
In general amount is preferably from about 0.001~1 mass %, particularly preferably about 0.01~0.2 matter relative to the gross weight of monomer
Measure %.The polymer manufactured by these polymerizations can be further as desired by under reduced pressure or in non-active gas
The solid phase of heating realizes the increase of molecular weight.
The melt viscosity of (A) liquid-crystalline resin to being obtained by method as described above is not particularly limited.It is general next
Say, it is more than 10MPa and below 600MPa under the cutting speed of 1000 seconds -1 that can use the melt viscosity under forming temperature
Resin.But the too high resin of viscosity of its own is due to mobility extreme degradation, thus it is not preferred.It should be noted that
Above-mentioned (A) liquid-crystalline resin can also be the mixture of liquid-crystalline resin of more than two kinds.
In the camera module use liquid crystalline resin composition of the present invention, the content of (A) liquid-crystalline resin is 55~91 matter
Measure %.(A) when the content of composition is more than 55 mass %, from mobility, suppresses formed body wildness this reason and be
Preferably, when the content of (A) composition is below 91 mass %, from heat resistance, this reason is preferable.In addition, (A) into
The content divided is preferably 60~80 mass %.
[(B) non-conductive filler]
For (B) non-conductive filler, it is selected from the non-conductive filler of (B1) threadiness and (B2) Non-fibrous
It is at least one kind of in non-conductive filler, the avarage fiber diameter of the non-conductive filler of (B1) threadiness for 1.0 μm with
Under and average fiber length be 5~50 μm, the non-conductive filler of (B2) Non-fibrous be selected from average grain diameter be 50 μm
It is at least one kind of in following, sheet filler and particulate fillers.
(B1) avarage fiber diameter of the non-conductive filler of threadiness is less than 1.0 μm, and avarage fiber diameter is preferably
0.3~0.6 μm.When above-mentioned avarage fiber diameter is less than 1.0 μm, the effect for suppressing formed body wildness easily uprises.Need
It is noted that in this manual, as avarage fiber diameter, read using by stereomicroscope image from CCD camera
To personal computer (PC) and the value for determining to obtain by image processing method using determining image instrument.
In addition, the average fiber length of the non-conductive filler of (B1) threadiness is 5~50 μm, average fiber length is preferred
For 7~30 μm.Above-mentioned average fiber length be more than 5 μm when, it is easy to ensure that as the mechanical strength required for camera module,
Temperature of deflection under load, when being less than 50 μm, the effect for suppressing formed body wildness easily uprises.It should be noted that at this
In specification, as average fiber length, read using by stereomicroscope image from CCD camera to personal computer (PC)
And the value for determining to obtain by image processing method using determining image instrument.
As long as meeting the fibrous non-conductive filler of above shape, then any fiber can be used, as (B1)
The non-conductive filler of threadiness, such as can enumerate：Glass fibre, asbestos fibre, silicon dioxide fibre, silica/oxygen
Change the inorganic fibrous materials such as aluminum fiber, Zirconium oxide fibre, boron nitride fiber, silicon nitride fiber, boron fibre, potassium titanate fibre.
As (B1) composition, the non-conductive filler of threadiness of more than two kinds can be used.In the present invention, as (B1) composition, preferably
Use potassium titanate fibre.
(B2) the non-conductive filler of Non-fibrous selected from average grain diameter be less than 50 μm, sheet filler and
It is at least one kind of in particulate fillers.When above-mentioned average grain diameter is less than 50 μm, the effect for suppressing formed body wildness easily becomes
It is high.Above-mentioned average grain diameter is preferably 10~20 μm.It should be noted that in this specification, as average grain diameter, spread out using laser
Penetrate/the value that is determined of the formula determination of particle size distribution of scattering.
As long as meeting the non-conductive filler of Non-fibrous of above shape, then any filler can be used, as
Sheet filler, it can enumerate：Talcum, mica, glass flake etc..In addition, as particulate fillers, can enumerate：Dioxy
The silicate such as SiClx, quartz powder, bead, glass dust, calcium silicates, alumina silicate, kaolin, clay, diatomite, wollastonite；
The metal oxides such as iron oxide, titanium oxide, zinc oxide, aluminum oxide；The metal carbonates such as calcium carbonate, magnesium carbonate；Calcium sulfate, sulfuric acid
The metal sulfates such as barium；Carborundum；Silicon nitride；Boron nitride etc..As (B2) composition, two or more can be used.In the present invention,
As (B2) composition, preferably using the talcum of sheet filler, mica；The silica of particulate fillers, is more preferably used
Talcum, the mica of sheet filler.
(B) content (total amount of the content of above-mentioned (B1) composition and the content of above-mentioned (B2) composition) of composition is the present invention's
It is 5~20 mass % in camera module use liquid crystalline composition.(B) when the content of composition is more than 5 mass %, it is easy to ensure that
As the mechanical strength needed for camera module, temperature of deflection under load, when being below 20 mass %, suppress formed body wildness
Effect easily uprise.Above-mentioned content is more preferably 10~20 mass %.
[(C) copolymer]
(C) copolymer is at least one kind of in (C1) olefin copolymer and (C2) styrene based copolymer.Make (C)
Composition helps to suppress in the formed body for being molded with said composition with camera module use liquid crystalline resin composition is mixed in
During progress ultrasonic wave cleaning, formed body surface fluffing.
The reason for suppression fluffing is still not clear, but can consider：By being compounded with certain constant basis, formed body surface shape can be made
State changes, and the change helps to suppress to fluff.
As (C1) olefin copolymer, such as it can enumerate by the repeat unit from alpha-olefin and be derived from α, β-insatiable hunger
The copolymer formed with the repeat unit of the ethylene oxidic ester of acid.
Alpha-olefin is not particularly limited, such as ethene, propylene, butylene etc. can be included, wherein, preferably using ethene.
The ethylene oxidic ester of alpha, beta-unsaturated acid is the compound shown in following logical formula (IV)s.The ethylene oxidic ester example of alpha, beta-unsaturated acid
If any glycidyl acrylate, GMA, glycidyl ethacrylate, itaconic acid glycidol
Ester etc., particularly preferably GMA.
Preferably, in (C1) olefin copolymer, the content of the repeat unit from alpha-olefin is 87~98 mass %,
The content of the repeat unit of ethylene oxidic ester from alpha, beta-unsaturated acid is 13~2 mass %.
On (C1) olefin copolymer used in the present invention, do not damaging in the scope of the present invention, except above-mentioned two
Beyond kind of composition, 0~48 mass parts can also be contained relative to 100 mass parts above two compositions and ternary are derived from as the
1 kind or 2 in the olefin-based beta-unsaturated esters such as acrylonitrile, acrylate, methacrylate, α-methylstyrene, maleic anhydride
The repeat unit of the kind above.
(C1) composition of the present invention is that olefin copolymer can use monomer corresponding to each composition, radical polymerization to be catalyzed
Agent is easily prepared by common radical polymerization.More specifically, generally by making alpha-olefin and α, β-unsaturation
The ethylene oxidic ester of acid in the presence of free-radical generating agent, 500~4000 atmospheric pressure, at 100~300 DEG C, appropriate
Solvent, the existence or non-existence of the chain-transferring agent lower method being copolymerized manufactures.In addition it is also possible to by by alpha-olefin and
The method that the ethylene oxidic ester and free-radical generating agent of alpha, beta-unsaturated acid mix and carry out fusion-grafting copolymerization in an extruder
To manufacture.
As (C2) styrene based copolymer, such as it can enumerate by the repeat unit from phenylethylene and be derived from α, β-
The copolymer that the repeat unit of the ethylene oxidic ester of unsaturated acids is formed.On α, the ethylene oxidic ester of beta-unsaturated acid, due to
It is identical with illustrating in (C1) composition, therefore omit the description.
As phenylethylene, styrene, α-methylstyrene, bromostyrene, divinylbenzene etc. can be included, preferably
Use styrene.
(C2) styrene based copolymer used in the present invention can also be work containing above two composition and in addition
For the multiple copolymer of the ternary one kind or two or more repeat unit from other vinyl monomers.It is suitable to be used as the
It is ternary to be, from a kind in the olefin-based beta-unsaturated esters such as acrylonitrile, acrylate, methacrylate, maleic anhydride or
Repeat unit of more than two kinds.The polystyrene containing below 40 mass % these repeat units is total in styrene based copolymer
Polymers is preferable as (C2) composition.
(C2) in styrene based copolymer, it is preferred that from α, the repeat unit of the ethylene oxidic ester of beta-unsaturated acid
Content be 2~20 mass %, the content of the repeat unit from phenylethylene is 80~98 weight %.
(C2) styrene based copolymer can be passed through common using monomer, catalysts for radical polymerization corresponding to each composition
It is prepared by radical polymerization.More specifically, generally by making phenylethylene and α, the ethylene oxidic ester of beta-unsaturated acid exists
In the presence of free-radical generating agent, 500~4000 atmospheric pressure, at 100~300 DEG C, in appropriate solvent, chain-transferring agent
Manufactured presence or absence of the lower method being copolymerized.In addition it is also possible to by by phenylethylene and α, beta-unsaturated acid
Ethylene oxidic ester and free-radical generating agent mixing and the method for progress fusion-grafting copolymerization manufactures in an extruder.
It should be noted that as (C) copolymer, (C1) olefin copolymer is preferred from the viewpoint of heat resistance
, the ratio of (C1) composition and (C2) composition can be selected suitably according to required characteristic.
(C) content (total amount of (C1) composition and (C2) composition) of copolymer is in the camera module use resin group of the present invention
It is 2~10 mass % in compound.(C) content of composition is more than 2 mass % from the viewpoint of formed body wildness is suppressed
It is necessary, never damages mobility, obtain good formed body this reason and set out, is that below 10 mass % are necessary.
Above-mentioned content is more preferably 2~7 mass %.
[agent of (D) conductive filler]
(D) conductive filler agent includes：(D1) average fiber length is more than 50 μm of fibrous conductive filler agent；With
(D2) it is at least one kind of non-fiber in 20nm~50 μm, sheet filler and particulate fillers selected from average grain diameter
Shape conductive filler agent.
In addition, the average fiber length of (D1) fibrous conductive filler agent is more than 50 μm.From performance antistatic behaviour
Viewpoint is set out, and above-mentioned average fiber length is 50 μm above is necessary.It should be noted that above-mentioned average fiber length is upper
Limit is not particularly limited, and in practicality, such as can enumerate 10mm.
As long as meeting the fibrous conductive filler agent of above shape, then any fiber can be used, it is fine as (D1)
Shape conductive filler agent is tieed up, such as can be enumerated：Carbon fiber；The conducting fibres such as metallic fiber；To glass fibre, whisker, nothing
The metals such as the coating such as machine series fiber, ore series fiber nickel, copper, assign the fiber of electric conductivity.
As carbon fiber, can enumerate：PAN based carbon fibers using polyacrylonitrile as raw material；Using pitch as raw material
Pitch-based carbon fiber.
As metallic fiber, can enumerate by mild steel, stainless steel, steel with its alloy, copper, brass, aluminium and its alloy, titanium,
The fiber of the formation such as lead.For these metallic fibers, if being necessary using its electric conductivity, in order to further assign conduction
Property, it can also use and be coated with the fiber that other metals form.
As above-mentioned whisker, can enumerate：Silicon nitride crystal whisker, three silicon nitride crystal whiskers, basic magnesium sulfate whisker, barium titanate are brilliant
Palpus, silicon carbide whisker, boron whisker etc..As above-mentioned inorganic series fiber, can enumerate：By rock wool, zirconium oxide, alumina silicate, metatitanic acid
The fiber of the formation such as potassium, barium titanate, titanium oxide, carborundum, aluminum oxide, silica, blast-furnace cinder.It is fine as above-mentioned ore system
Dimension, can enumerate the fiber formed by asbestos etc..
As (D1) composition, fibrous conductive filler agent of more than two kinds can be used.In the present invention, as (D1) into
Point, preferably using PAN based carbon fibers, pitch-based carbon fiber.
In the camera module use resin combination of the present invention, the content of (D1) composition is 1~5 mass %.From performance
From the viewpoint of antistatic behaviour, the content of (D1) composition is 1 mass % above is necessary, is adjusted from by electric conductivity in semiconductive
The aspect in region and the aspect deteriorated from the reduction of suppression mobility, fluffing property, the content of (D1) composition is below 5 mass %
It is necessary.Above-mentioned content is more preferably 2~4 mass %.
(D2) agent of Non-fibrous conductive filler selected from average grain diameter be 20nm~50 μm, sheet filler and
It is at least one kind of in particulate fillers.From the viewpoint of mobility reduction is suppressed, above-mentioned average grain diameter is 20nm above is necessity
's.From the viewpoint of the flatness for suppressing surface deteriorates, it is necessary that above-mentioned average grain diameter, which is less than 50 μm,.
As long as meeting the Non-fibrous conductive filler agent of above shape, then any filler can be used, as piece
Shape filler, it can enumerate：Graphite, flake metal powder (such as aluminium, iron, copper) etc.., can be with addition, as particulate fillers
Enumerate：Carbon black, granular metal powder (such as aluminium, iron, copper), granular conductive ceramics (such as zinc oxide, tin oxide, oxidation
Indium tin) etc..As (D2) composition, two or more can be used.In the present invention, as (D2) composition, preferably using graphite, carbon black.
(D2) when composition is graphite, average grain diameter is preferably 5~50 μm, thickness is preferably 0.5~10 μm.
(D2) when composition is carbon black, average grain diameter is preferably 20~100nm.
In the camera module use resin combination of the present invention, the content of (D2) composition is 1~15 mass %.Led from suppression
From the viewpoint of the stable antistatic behaviour of electrical deviation, performance, the content of (D2) composition is 1 mass % above is necessary,
From the viewpoint of mobility reduction is suppressed, the content of (D2) composition is that below 15 mass % are necessary.Above-mentioned content is more excellent
Elect 2~10 mass % as.
[other compositions]
In the camera module use liquid crystalline resin composition of the present invention, in the range of effect of the present invention is not damaged, root
Other polymer can also be properly added according to required performance, generally make an addition to known material, i.e. antioxidant, the purple of synthetic resin
The colouring agents such as the stabilizers such as ultraviolet absorbers, the antistatic additive in addition to (D) composition, fire retardant, dyestuff, pigment, lubricant,
Releasing agent and crystallization accelerator, crystallization nucleating agent etc..
[preparation of camera module use liquid crystalline resin composition]
The preparation of the camera module use resin combination of the present invention is not particularly limited.It is for example, above-mentioned by being compounded
(A), (B) and (C) composition, and melting mixing processing is carried out to them using single screw rod or double screw extruder, so as to be shone
The preparation of camera model liquid crystalline resin composition.
[camera module use liquid crystalline resin composition]
The present invention camera module use liquid crystalline resin composition in (B) composition shape and compounding before (B) into
The shape divided is different.The shape of above-mentioned (B) composition is the shape before compounding.Before compounding be shaped as it is above-mentioned shown in it is such when, energy
Enough obtain the camera module use part that surface is not easy to fluff.
Equally, before the shape of (D) composition in camera module use liquid crystalline resin composition of the invention and compounding
(D) shape of composition is different.The shape of above-mentioned (D) composition is the shape before compounding.Being shaped as before compounding is above-mentioned shown such
When, it can obtain and be not easy powered camera module use part.
It is above-mentioned operate like that obtained from camera module use liquid crystalline resin composition of the invention melt viscosity it is excellent
Elect below the 50Pa seconds as.The camera module use liquid-crystalline resin that mobility is high, the excellent this point of mouldability is also the present invention
One of feature of composition.Wherein, melt viscosity is used in barrel zone temperature as condition that 350 DEG C, shear rate are 1000 seconds -1
The lower value obtained using the assay method based on ISO 11443.
The temperature of deflection under load of the camera module use liquid crystalline resin composition of the present invention is preferably more than 200 DEG C.It is resistance to
Hot excellent this point is also one of feature of camera module use liquid crystalline resin composition of the present invention.Need what is illustrated
Being that temperature of deflection under load uses utilizes the value based on ISO 75-1,2 method measure.
The specific insulation of the camera module use liquid crystalline resin composition of the present invention is 1 × 104~1 × 1014Ω·
cm.That is, by the adjustment of the electric conductivity of above-mentioned specific insulation in semiconductor regions, thus excellent antistatic behaviour is showed.It is above-mentioned
Specific insulation is less than 1 × 104During Ω cm, that electric conductivity becomes too high, produces short circuit be present.Foregoing volume resistance
Rate is more than 1 × 1014During Ω cm, that electric conductivity becomes too low, do not show antistatic behaviour be present.
<Camera module use part and camera module>
Camera module use part is manufactured using above-mentioned camera module use liquid crystalline resin composition.If use the present invention
Resin combination as raw material, then camera module use part becomes to be not easy powered.Therefore, by the resin combination of the present invention
The camera module use part of formation is difficult to malfunction caused by causing electrostatic.
In addition, if use the resin combination of the present invention becomes not as raw material, the surface of camera module use part
Easily fluffing.Camera module use part is cleaned with ultrasonic wave, therefore it is required that even if ultrasonic wave cleaning is not easy to make wildness.
If using the resin combination of the present invention, even if the ultrasonic wave that camera module use part is carried out with stronger condition cleans,
Also it will not produce or not produce cast the reason for turning into dirt etc. substantially.Therefore, camera module use part is assembled
After finished goods, substantially finished goods will not be influenceed because of dirt caused by the wildness of the camera module use part
Quality.
For the camera module use part for being molded with the camera module use liquid crystalline resin composition of the present invention
Illustrate.Fig. 1 schematically shows the sectional view of common camera module.As shown in Figure 1, camera module 1 has
Standby substrate 10, optical element 11, lead 12, lens holders 13, lens barrel 14, lens 15, IR optical filters 16 and guide member 17.
Optical element 11 is configured on the substrate 10, is electrically connected between optical element 11 and substrate 10 by lead 12
Connect.
Guide member 17 is configured on the substrate 10, and lens holders 13 are configured on guide member 17, guide member 17 and thoroughly
Mirror keeper 13 covers optical element 11.Lens holders 13 are at top formed with opening, and the opening wall is formed with helical form
Ditch portion.
Lens barrel 14 is cylindrical shape, and lens 15 are maintained at cylindric inside in a generally horizontal fashion.In addition, in cylinder
Formed with spiral helicine convex portion in one side wall, the spiral shell of opening wall of the spiral helicine convex portion with being formed at lens holders 13
Rotation shape ditch portion is screwed, so as to which lens barrel 14 is connected into lens holders 13.In addition, IR optical filters 16 are configured in lens barrel 14
One end, for close cylindrical shape lens barrel 14 one end.As shown in Figure 1, IR optical filters 16 and lens 15 are almost parallel
Ground arranges.
In camera module 1 as shown in Figure 1, lens holders 13 utilize the coil for being wound in lens holders 13
Effect between magnetic force caused by (not shown) and the permanent magnet (not shown) being configured at around coil and on guide member 17
Move up and down, so as to which the distance between lens 15 and optical element 11 change.By adjusting the distance, can carry out
The focusing of camera.
, can be with the camera module use liquid crystalline resin composition of the present invention in camera module 1 as described above
The lens holders 13 as camera module use part are manufactured as raw material.Common liquid crystalline resin composition is not suitable for
As the raw material for manufacturing these parts.Lens holders 13 are manufactured using common liquid crystalline resin composition as raw material
When, the problem of following can be produced.
The easy with negative electricity of formed body that common liquid crystalline resin composition is molded with and with by easy positively charged
Electrostatic is produced between the resin formed body that for example material containing nylon is molded with, in the camera module as malfunction
The reason for.In addition, by the formed body that common liquid crystalline resin composition is molded with because high molecular molecularly oriented is in table
Facial dtex is not big, therefore formed body surface is easily fluffed, and the fluffing can turn into the reason for producing small dirt.The small dirt attachment
When the grade of lens 15, the performance of camera module reduces.
The grade camera module use part of lens holders 13 for remove the dust on surface, small dirt purpose and assembling
Ultrasonic wave cleaning is carried out before camera module 1.But the formed body for being molded with common liquid crystalline resin composition
Surface easily fluff, therefore, carry out ultrasonic wave cleaning when surface can fluff.Due to the problem of such can be produced, therefore, generally
The formed body that can not be molded with to liquid crystalline resin composition carries out ultrasonic wave cleaning.
Above-mentioned focusing is by making lens holders 13 be produced using the coil (not shown) for being wound in lens holders 13
Effect between raw magnetic force and the permanent magnet (not shown) being configured at around coil and moved up and down on guide member 17
Come carry out.Now, first, the lens holders 13 that are formed in the formed body by liquid crystalline resin composition is molded with, with
Electrostatic is produced between the guide member 17 formed by the formed body for being molded with the material containing nylon etc., lens holders 13 hold
Easily cause malfunction.Then, second, as described above, the formed body that common liquid crystalline resin composition is molded with
Surface is easily fluffed, therefore there is a possibility that surface occurs Bao From and is peeling thing.The overburden turns into small dirt and attached
In the grade of lens 15 so that the possibility height that the performance of camera module reduces.
As described above, generally, easily produced when liquid crystalline resin composition is used as into the raw material of lens holders 13 bad
Situation, but by the present invention camera module use liquid crystalline resin composition formed body is made when, be not easy it is powered, and can will
The problem of surface state of formed body improves to even if also will not substantially produce fluffing to formed body progress ultrasonic wave cleaning
Degree, thus, it may be preferable to ground be used as lens holders 13 raw material.
When the camera module use liquid crystalline resin composition of the present invention is used for into lens holders 13, as guide member 17
Material, the material in addition to the camera module use liquid crystalline resin composition of the present invention can be enumerated, specifically, can be with
Enumerate nylon etc..
Embodiment
Hereinafter, embodiment is enumerated the present invention is described in more detail, but the present invention is not limited to these embodiments.
<Material>
Liquid-crystalline resin (liquid crystalline polyester amide resin)：VECTRA (registration mark) E950i (Polyplastics
Co., Ltd. is manufactured)
Olefin copolymer：Sumitomo Chemical Co., Ltd. manufacture BONDFAST 2C (ethene-methyl-prop
Olefin(e) acid glycidyl ester copolymer (containing 6 mass % GMAs))
Fibrous conductive filler agent：Toho Tenax Co., Ltd. manufactures HTC432 (PAN based carbon fibers, average fibre
Tie up 10 μm of diameter, average fiber length 6mm)
Non-fibrous conductive filler agent 1：Japanese graphite Industrial Co., Ltd manufacture CP (graphite, 10 μm of average grain diameter,
Sheet)
Non-fibrous conductive filler agent 2：Cabot Japan K.K manufacture VULCAN XC305 (carbon black, average grain diameter
20nm, graininess)
The non-conductive filler of threadiness：Otsuka Chemical Co., Ltd. manufacture Tisomo N-102 (metatitanic acids
Potassium fiber, 0.3~0.6 μm of avarage fiber diameter, 10~20 μm of average fiber length)
The non-conductive filler of Non-fibrous：Ishihara Sangyo Kaisha, Ltd. manufacture Crown talc PP (talcum, are averaged
12.8 μm of particle diameter, average aspect ratio 6, sheet)
<The manufacture of camera module use liquid crystalline resin composition>
Mentioned component is pressed using double screw extruder (The Japan Steel Works, LTD. manufacture TEX30 α types)
Melting mixing is carried out under 350 DEG C of barrel zone temperature according to the ratio shown in table 1, obtains camera module use liquid-crystalline resin group
Polymer beads.
<Melt viscosity>
The melting that the camera module use liquid crystalline resin composition of embodiment and comparative example is determined using above-mentioned particle is glued
Degree.Specifically, capillary type rheometer (Toyo Seiki Seisaku-sho, Ltd. manufacture Capilograph 1D are utilized：
Piston footpath is 10mm), according to ISO 11443 come to determine barrel zone temperature be 350 DEG C, shear rate is 1000 seconds-1Under conditions of
Apparent melt viscosity.The aperture (orifice) that internal diameter is 1mm, length is 20mm has been used in measure.Show the result in table 1.
<Bend test>
130mm × 13mm × 0.8mm bend test piece is made by above-mentioned particle, using the test film, according to ASTM
D790, determine bending strength and the modulus of elasticity in static bending.Show the result in table 1.
<Temperature of deflection under load>
Using forming machine (Sumitomo Heavy Industries, Ltd manufactures " SE100DU "), according to following shaping
Embodiment and the grain forming of comparative example are obtained measure test film (4mm × 10mm × 80mm) by condition.Thereafter, base is utilized
In ISO 75-1,2 method measuring load deflection temperature.It should be noted that as bending stress, 1.8MPa has been used.Will
As a result it is shown in table 1.
[condition of molding]
Barrel zone temperature:350℃
Metal type temperature:80℃
Back pressure:2.0MPa
Injection speed:The 33mm/ seconds
<Specific insulation>
UseTreadmill test piece, according to ASTM D257 determine specific insulation.Result is shown
In table 1.
<The evaluation of the fluffing state (effect for suppressing wildness) on formed body surface>
Using forming machine (Sumitomo Heavy Industries, Ltd manufactures " SE30DUZ "), according to following shaping
Embodiment and the grain forming of comparative example are obtained 12.5mm × 120mm × 0.8mm formed body by condition.The formed body is cut
Half is broken into as test film to use.
[condition of molding]
Barrel zone temperature：350℃
Metal type temperature：90℃
Injection speed：The 80mm/ seconds
[evaluation]
The formed body for cutting into half is placed in supersonic wave cleaning machine (output 300W, frequency 45kHz) in the water of room temperature
In 3 minutes.Thereafter, the formed body being placed in before and after supersonic wave cleaning machine is compared, with image determiner (Nireco Corporation
Manufacture LUZEXFS) evaluate the area (rise gross area) of the fluffing part on formed body surface.It should be noted that evaluation area
For 750mm2(12.5mm × 60mm), using above-mentioned gross area relative to above-mentioned evaluation area ratio (%) as a result.
Show the result in table 1.
Rise gross area it is fewer, then be evaluated as suppress fluffing effect it is higher.
Table 1
Can clearly it be confirmed as the result described in table 1：The volume of the formed body manufactured using the particle of embodiment
Resistivity is in 1 × 104~1 × 1014In the range of Ω cm.In addition, it can confirm：It is clear that even if above-mentioned formed body carries out ultrasonic wave
Wash, its surface is not also fluffed.By these results it may be said that：With by the common liquid crystalline resin composition particle such as comparative example
The formed body being molded with is compared, and the excellent antistatic property for the formed body that the grain forming of embodiment is formed, surface state shows
Write different.
In addition, it can confirm：The heat resistance and excellent impact resistance of the formed body manufactured using the particle of embodiment.
Description of reference numerals
1 camera module
10 substrates
11 optical elements
12 leads
13 lens holders
14 lens barrels (barrel)
15 lens
16 IR optical filters
17 guide members (guide)
Claims (4)
1. a kind of camera module use liquid crystalline resin composition, it contains：
(A) liquid-crystalline resin；
(B) non-conductive filler, it is selected from (B1) non-conductive filler of threadiness and (B2) Non-fibrous is non-conductive fills out
Fill at least one kind of in agent；
(C) copolymer, it is selected from least one kind of in (C1) olefin copolymer and (C2) styrene based copolymer；And
(D) conductive filler agent, it includes (D1) fibrous conductive filler agent and the conductive filler agent of (D2) Non-fibrous,
(A) content of composition is 55~91 mass %, the content of (B) composition is 5~20 mass %, the content of (C) composition be 2~
10 mass %, the content of (D1) composition are 1~5 mass %, the content of (D2) composition is 1~15 mass %,
The avarage fiber diameter of the non-conductive filler of (B1) threadiness is less than 1.0 μm, and average fiber length for 5~
50 μm,
The non-conductive filler of (B2) Non-fibrous selected from average grain diameter be less than 50 μm, sheet filler and
It is at least one kind of in particulate fillers,
(C1) olefin copolymer is made up of alpha-olefin and α, the ethylene oxidic ester of beta-unsaturated acid,
(C2) styrene based copolymer is made up of phenylethylene and α, the ethylene oxidic ester of beta-unsaturated acid,
(D1) fibrous conductive filler agent is the carbon fiber that average fiber length is more than 50 μm,
(D2) the Non-fibrous conductive filler agent selected from average grain diameter be 20nm~50 μm, sheet filler and
It is at least one kind of in particulate fillers,
The specific insulation of the camera module use liquid crystalline resin composition is 1 × 104~1 × 1014Ω·cm。
2. a kind of camera module use part, it is as the camera module use liquid crystalline resin composition shape described in claim 1
Into.
3. camera module use part according to claim 2, it is lens holders.
4. a kind of camera module, it possesses lens holders and guide member, and the guide member is as the lens holders
Bearing,
The lens holders are formed as the camera module use liquid crystalline resin composition described in claim 1,
The guide member is formed by the material in addition to the camera module use liquid crystalline resin composition.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-264608 | 2012-12-03 | ||
| JP2012264608 | 2012-12-03 | ||
| JP2013085830 | 2013-04-16 | ||
| JP2013-085830 | 2013-04-16 | ||
| PCT/JP2013/081324 WO2014087842A1 (en) | 2012-12-03 | 2013-11-20 | Liquid crystal resin composition for camera module and camera module using same |
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| CN104822775A CN104822775A (en) | 2015-08-05 |
| CN104822775B true CN104822775B (en) | 2017-12-05 |
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| Country | Link |
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| JP (1) | JP5826411B2 (en) |
| KR (1) | KR101625009B1 (en) |
| CN (1) | CN104822775B (en) |
| TW (1) | TWI544018B (en) |
| WO (1) | WO2014087842A1 (en) |
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| US10407605B2 (en) | 2015-07-31 | 2019-09-10 | Ticona Llc | Thermally conductive polymer composition |
| US9862809B2 (en) | 2015-07-31 | 2018-01-09 | Ticona Llc | Camera module |
| TWI708806B (en) * | 2015-08-17 | 2020-11-01 | 美商堤康那責任有限公司 | Liquid crystalline polymer composition for camera modules |
| KR102081231B1 (en) * | 2015-09-01 | 2020-02-25 | 포리프라스틱 가부시키가이샤 | Liquid Crystal Resin Composition for Camera Module and Camera Module Using the Same |
| CN108350278B (en) * | 2015-12-24 | 2019-07-26 | 宝理塑料株式会社 | Camera module use liquid crystalline resin composition, its manufacturing method and use have the camera module of the composition |
| WO2018021389A1 (en) | 2016-07-27 | 2018-02-01 | 住友化学株式会社 | Prepreg, prepreg laminate and method for producing prepreg |
| US10633535B2 (en) | 2017-02-06 | 2020-04-28 | Ticona Llc | Polyester polymer compositions |
| JP6989759B2 (en) * | 2017-07-06 | 2022-01-12 | ミツミ電機株式会社 | Lens drive device, camera module, and camera mount device |
| CN111417681B (en) | 2017-12-05 | 2023-08-22 | 提克纳有限责任公司 | Aromatic polymer composition for camera module |
| CN110079058A (en) | 2018-01-26 | 2019-08-02 | 上野制药株式会社 | Liquid crystal polyester resin compositions |
| EP3749710A1 (en) | 2018-02-08 | 2020-12-16 | Celanese Sales Germany GmbH | Polymer composite containing recycled carbon fibers |
| CN111741841B (en) | 2018-02-20 | 2023-05-30 | 提克纳有限责任公司 | Thermally conductive polymer composition |
| WO2020190569A1 (en) | 2019-03-20 | 2020-09-24 | 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 |
| KR102461065B1 (en) | 2020-12-29 | 2022-11-01 | 세양폴리머주식회사 | Liquid crystal polyester resin composition and electronic component material containing the same |
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| WO2014087842A1 (en) | 2014-06-12 |
| JP5826411B2 (en) | 2015-12-02 |
| JPWO2014087842A1 (en) | 2017-01-05 |
| TWI544018B (en) | 2016-08-01 |
| CN104822775A (en) | 2015-08-05 |
| KR20150093692A (en) | 2015-08-18 |
| KR101625009B1 (en) | 2016-05-30 |
| TW201434903A (en) | 2014-09-16 |
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