JP2000273292A - Liquid crystalline polymer composition for optical pickup and optical pickup - Google Patents

Liquid crystalline polymer composition for optical pickup and optical pickup

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Publication number
JP2000273292A
JP2000273292A JP7596999A JP7596999A JP2000273292A JP 2000273292 A JP2000273292 A JP 2000273292A JP 7596999 A JP7596999 A JP 7596999A JP 7596999 A JP7596999 A JP 7596999A JP 2000273292 A JP2000273292 A JP 2000273292A
Authority
JP
Japan
Prior art keywords
liquid crystalline
crystalline polymer
polymer composition
filler
optical pickup
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP7596999A
Other languages
Japanese (ja)
Inventor
Takayuki Miyashita
貴之 宮下
Hiroyuki Kobayashi
博行 小林
Mineo Otake
峰生 大竹
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Polyplastics Co Ltd
Original Assignee
Polyplastics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Polyplastics Co Ltd filed Critical Polyplastics Co Ltd
Priority to JP7596999A priority Critical patent/JP2000273292A/en
Publication of JP2000273292A publication Critical patent/JP2000273292A/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To obtain a liquid crystalline polymer composition used for compact disks, laser disks, video disks, magneto-optical disks, etc., and excellent in environmental stability of laser focus by adding a granular filler to a liquid crystal polymer. SOLUTION: This polymer composition, preferably having <=200 pts.wt. total content of filler comprises (A) 100 pts.wt. liquid crystalline polymer (preferably polyesteramide), (B) 80-200 pts.wt. granular filler (preferably talc, titanium oxide, glass beads or silica) having 0.1-50 μm average particle diameter and preferably further (C) 5-100 pts.wt. fibrous filler (e.g. glass fiber or carbon fiber) having 5-20 μm average fiber diameter and >=15 average aspect ratio. p-Hydroxybenzoic acid, etc., is exemplified as a compound constituting the component A. A nucleating agent, pigment, an antioxidant, a stabilizer, etc., can be added to the composition.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、粒状充填材を含有
した液晶性ポリマーに関するものであり、更に詳しくは
このような液晶性ポリマー組成物から成形したコンパク
トディスク、レーザーディスク、ビデオディスク、光磁
気ディスク等に用いるレーザー焦点の環境安定性に優れ
た光ピックアップに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystalline polymer containing a particulate filler, and more particularly to a compact disk, a laser disk, a video disk, and a magneto-optical disk molded from such a liquid crystalline polymer composition. The present invention relates to an optical pickup having excellent environmental stability of a laser focus used for a disk or the like.

【0002】[0002]

【従来の技術及び発明が解決しようとする課題】従来、
光ピックアップに用いる熱可塑性樹脂には、レーザー焦
点の環境安定性(環境温度の変化によってもレーザー焦
点が安定していること)という特殊な性質が要求され、
一般にポリアリーレンサルファイド樹脂が使用されてい
る。しかしながら、ポリアリーレンサルファイド樹脂組
成物は、上記のレーザー焦点の環境安定性、寸法精度に
は優れているが、制振性に劣り、且つ成形時の金型腐
食、成形品のバリ等の問題があり、光ピックアップ用樹
脂組成物として充分満足のいくものではない。一方、異
方性溶融相を形成し得る液晶性ポリマーは、熱可塑性樹
脂の中でも寸法精度、制振性に優れ、成形時のバリが極
めて少ない材料として知られており、各種電気・電子機
器部品に用いられている。そこで、液晶性ポリマーを光
ピックアップ用樹脂として使用するが考えられるが、液
晶性ポリマーにはレーザー焦点の環境安定性が劣るとい
う欠点があり、光ピックアップへの適用が控えられてい
た。
2. Description of the Related Art
The thermoplastic resin used for the optical pickup is required to have a special property of environmental stability of the laser focus (the laser focus is stable even when the environmental temperature changes).
Generally, a polyarylene sulfide resin is used. However, the polyarylene sulfide resin composition is excellent in environmental stability and dimensional accuracy of the laser focus as described above, but is inferior in vibration damping properties, and has problems such as mold corrosion during molding and burrs of molded products. However, it is not sufficiently satisfactory as a resin composition for an optical pickup. On the other hand, liquid crystalline polymers that can form an anisotropic molten phase are known as materials that have excellent dimensional accuracy and vibration damping properties and have extremely few burrs during molding among thermoplastic resins. It is used for Therefore, it is conceivable to use a liquid crystalline polymer as a resin for an optical pickup. However, the liquid crystalline polymer has a drawback that environmental stability at a laser focus is inferior, and its application to an optical pickup has been refrained.

【0003】[0003]

【課題を解決するための手段】本発明者等は上記問題点
に鑑み、液晶性ポリマーへのレーザー焦点の環境安定性
の付与について鋭意探索、検討を行ったところ、液晶ポ
リマーに対し特定の粒状充填材を特定量含有させること
により、機械的性質を大きく低下させることなくレーザ
ー焦点の環境安定性を向上させ得ることを見出し、本発
明を完成するに至った。即ち本発明は、液晶性ポリマー
(A)100重量部に、平均粒径0.1〜50μmの粒
状充填材(B)を80〜200重量部含有してなる、光
ピックアップ用液晶性ポリマー組成物を提供するもので
ある。
Means for Solving the Problems In view of the above problems, the present inventors have conducted intensive searches and studies on imparting environmental stability of a laser focus to a liquid crystalline polymer. It has been found that by including a specific amount of the filler, the environmental stability of the laser focus can be improved without significantly lowering the mechanical properties, and the present invention has been completed. That is, the present invention provides a liquid crystal polymer composition for an optical pickup, which comprises 80 to 200 parts by weight of a particulate filler (B) having an average particle size of 0.1 to 50 μm per 100 parts by weight of a liquid crystal polymer (A). Is provided.

【0004】[0004]

【発明の実施の形態】以下、本発明を詳細に説明する。
本発明で使用する液晶性ポリマー(A)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。前記
のような液晶性ポリマー(A)としては特に限定されな
いが、芳香族ポリエステル又は芳香族ポリエステルアミ
ドであることが好ましく、芳香族ポリエステル又は芳香
族ポリエステルアミドを同一分子鎖中に部分的に含むポ
リエステルもその範囲にある。これらは60℃でペンタ
フルオロフェノールに濃度0.1重量%で溶解したとき
に、好ましくは少なくとも約2.0dl/g、さらに好
ましくは2.0〜10.0dl/gの対数粘度(I.
V.)を有するものが使用される。本発明に適用できる
液晶性ポリマー(A)としての芳香族ポリエステル又は
芳香族ポリエステルアミドとして特に好ましくは、芳香
族ヒドロキシカルボン酸、芳香族ヒドロキシアミン、芳
香族ジアミンの群から選ばれた少なくとも1種以上の化
合物を構成成分として有する芳香族ポリエステル、芳香
族ポリエステルアミドである。より具体的には、 (1)主として芳香族ヒドロキシカルボン酸およびその
誘導体の1種又は2種以上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およ
びその誘導体の1種又は2種以上と、(b)芳香族ジカ
ルボン酸、脂環族ジカルボン酸およびその誘導体の1種
又は2種以上と、(c)芳香族ジオール、脂環族ジオー
ル、脂肪族ジオールおよびその誘導体の少なくとも1種
又は2種以上、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およ
びその誘導体の1種又は2種以上と、(b)芳香族ヒド
ロキシアミン、芳香族ジアミンおよびその誘導体の1種
又は2種以上と、(c)芳香族ジカルボン酸、脂環族ジ
カルボン酸およびその誘導体の1種又は2種以上、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およ
びその誘導体の1種又は2種以上と、(b)芳香族ヒド
ロキシアミン、芳香族ジアミンおよびその誘導体の1種
又は2種以上と、(c)芳香族ジカルボン酸、脂環族ジ
カルボン酸およびその誘導体の1種又は2種以上と、
(d)芳香族ジオール、脂環族ジオール、脂肪族ジオー
ルおよびその誘導体の少なくととと1種又は2種以上、
とからなるポリエステルアミドなどが挙げられる。さら
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。
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
The liquid crystalline polymer (A) used in the present invention refers to a melt-processable polymer having a property capable of forming an optically anisotropic molten phase. The properties of the anisotropic molten phase can be confirmed by a conventional polarization inspection method using an orthogonal polarizer. More specifically, the anisotropic molten phase can be confirmed by using a Leitz polarizing microscope and observing the molten sample placed on the Leitz hot stage at a magnification of 40 times under a nitrogen atmosphere. When the liquid crystalline polymer applicable to the present invention is inspected between orthogonal polarizers, polarized light is normally transmitted even when it is in a molten stationary state, and exhibits optical anisotropy. The liquid crystal polymer (A) as described above is not particularly limited, but is preferably an aromatic polyester or an aromatic polyesteramide, and a polyester partially containing an aromatic polyester or an aromatic polyesteramide in the same molecular chain. Are also in that range. These are preferably at least about 2.0 dl / g, more preferably 2.0 to 10.0 dl / g logarithmic viscosity (I.P.) when dissolved in pentafluorophenol at 60 ° C. at a concentration of 0.1% by weight.
V. ) Is used. The aromatic polyester or aromatic polyesteramide as the liquid crystalline polymer (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. Aromatic polyesters and aromatic polyester amides having the above-mentioned compound as a component. More specifically, (1) a polyester mainly consisting of one or more aromatic hydroxycarboxylic acids and derivatives thereof; (2) one or two types of mainly (a) aromatic hydroxycarboxylic acids and derivatives thereof And (b) one or more of aromatic dicarboxylic acids, alicyclic dicarboxylic acids and derivatives thereof, and (c) at least one of aromatic diols, alicyclic diols, aliphatic diols and derivatives thereof Or (3) mainly one or more of (a) aromatic hydroxycarboxylic acids and derivatives thereof and (b) one of aromatic hydroxyamines, aromatic diamines and derivatives thereof. Polyester comprising a species or two or more species and (c) one or more species of aromatic dicarboxylic acid, alicyclic dicarboxylic acid and derivatives thereof (4) mainly (a) one or more aromatic hydroxycarboxylic acids and derivatives thereof, and (b) one or more aromatic hydroxyamines, aromatic diamines and derivatives thereof, c) one or more aromatic dicarboxylic acids, alicyclic dicarboxylic acids and derivatives thereof,
(D) at least one or more aromatic diols, alicyclic diols, aliphatic diols and derivatives thereof,
And polyester amides consisting of Further, a molecular weight modifier may be used in combination with the above-mentioned components as needed.

【0005】本発明に適用できる前記液晶性ポリマー
(A)を構成する具体的化合物の好ましい例としては、
p−ヒドロキシ安息香酸、6−ヒドロキシ−2−ナフト
エ酸等の芳香族ヒドロキシカルボン酸、2,6−ジヒド
ロキシナフタレン、1,4−ジヒドロキシナフタレン、
4,4’−ジヒドロキシビフェニル、ハイドロキノン、
レゾルシン、下記一般式(I)および下記一般式(II)
で表される化合物等の芳香族ジオール;テレフタル酸、
イソフタル酸、4,4’−ジフェニルジカルボン酸、
2,6−ナフタレンジカルボン酸および下記一般式(II
I)で表される化合物等の芳香族ジカルボン酸;p−アミ
ノフェノール、p−フェニレンジアミン等の芳香族アミ
ン類が挙げられる。
Preferred examples of specific compounds constituting the liquid crystalline polymer (A) applicable to the present invention include:
aromatic hydroxycarboxylic acids such as p-hydroxybenzoic acid and 6-hydroxy-2-naphthoic acid, 2,6-dihydroxynaphthalene, 1,4-dihydroxynaphthalene,
4,4′-dihydroxybiphenyl, hydroquinone,
Resorcinol, the following general formula (I) and the following general formula (II)
Aromatic diols such as compounds represented by the following; terephthalic acid,
Isophthalic acid, 4,4′-diphenyldicarboxylic acid,
2,6-naphthalenedicarboxylic acid and the following general formula (II
Aromatic dicarboxylic acids such as the compounds represented by I); and aromatic amines such as p-aminophenol and p-phenylenediamine.

【0006】[0006]

【化1】 Embedded image

【0007】本発明が適用される特に好ましい液晶性ポ
リマー(A)としては、p−ヒドロキシ安息香酸、6−
ヒドロキシ−2−ナフトエ酸、テレフタル酸およびp−
アミノフェノールを主構成単位成分とする芳香族ポリエ
ステルアミドである。
Particularly preferred liquid crystalline polymers (A) to which the present invention is applied include p-hydroxybenzoic acid and 6-hydroxybenzoic acid.
Hydroxy-2-naphthoic acid, terephthalic acid and p-
Aromatic polyesteramide containing aminophenol as a main constituent unit.

【0008】本発明の目的であるレーザー焦点の環境安
定性を達成するためには、液晶性ポリマー(A)100
重量部に、平均粒径0.1〜50μmの粒状充填材
(B)を80〜200重量部含有させる必要がある。本
発明において粒状充填材(B)としては、繊維状、板
状、短冊状の如き特定の方向への広がりを持たない粒状
体を意味し、平均アスペクト比が1〜2であるようなも
のを指す。その平均粒径は、0.1〜50μmである。
粒状充填材としては、具体的には、カオリン、クレー、
バーミキュライト、タルク、珪酸カルシウム、珪酸アル
ミニウム、長石粉、酸性白土、ロウ石クレー、セリサイ
ト、シリマナイト、ベントナイト、ガラス粉、ガラスビ
ーズ、スレート粉、シラン等の珪酸塩、炭酸カルシウ
ム、胡粉、炭酸バリウム、炭酸マグネシウム、ドロマイ
ト等の炭酸塩、バライト粉、沈降性硫酸カルシウム、焼
石膏、硫酸バリウム等の硫酸塩、水和アルミナ等の水酸
化物、アルミナ、酸化アンチモン、マグネシア、酸化チ
タン、亜鉛華、シリカ、珪砂、石英、ホワイトカーボ
ン、珪藻土等の酸化物、二硫化モリブデン等の硫化物、
金属粉粒体等の材質からなるものである。その中でも価
格と性能の面から、ガラスビーズ、タルクおよび酸化チ
タンが好ましい。レーザー焦点の環境安定性を達成する
には粒状充填材の含有量が多いほど良いが、含有量過多
は押出性および成形性を悪化させ、更には機械的強度を
低下させる。また、含有量が少なすぎてもレーザー焦点
の環境安定性が発現されない。そのため粒状充填材の含
有量は、液晶性ポリマー(A)100重量部に対して、
80〜200重量部、好ましくは100〜150重量部
である。
[0008] In order to achieve the environmental stability of the laser focus, which is the object of the present invention, the liquid crystalline polymer (A) 100
It is necessary that 80 to 200 parts by weight of the particulate filler (B) having an average particle size of 0.1 to 50 μm is contained in parts by weight. In the present invention, the granular filler (B) means a granular material having no spread in a specific direction, such as a fibrous, plate-like, or strip-like material, and has an average aspect ratio of 1 to 2. Point. Its average particle size is between 0.1 and 50 μm.
As the granular filler, specifically, kaolin, clay,
Vermiculite, talc, calcium silicate, aluminum silicate, feldspar powder, acid clay, lauric clay, sericite, sillimanite, bentonite, glass powder, glass beads, slate powder, silicates such as silane, calcium carbonate, chalk, barium carbonate, Carbonates such as magnesium carbonate and dolomite, barite powder, precipitated calcium sulfate, plaster of Paris, sulfates such as barium sulfate, hydroxides such as hydrated alumina, alumina, antimony oxide, magnesia, titanium oxide, zinc oxide, silica Oxides such as silica sand, quartz, white carbon, diatomaceous earth, sulfides such as molybdenum disulfide,
It is made of a material such as a metal powder. Among them, glass beads, talc, and titanium oxide are preferable in terms of price and performance. The higher the content of the particulate filler, the better to achieve the environmental stability of the laser focus, but the excessive content degrades the extrudability and moldability, and further lowers the mechanical strength. Also, if the content is too small, the environmental stability of the laser focus is not exhibited. Therefore, the content of the particulate filler is based on 100 parts by weight of the liquid crystalline polymer (A).
It is 80 to 200 parts by weight, preferably 100 to 150 parts by weight.

【0009】また、機械特性を向上させるために、更に
平均繊維径5〜20μmかつ平均アスペクト比15以上
の繊維状充填材(C)を5〜100重量部含有させるこ
ともできる。繊維状充填材(C)は、異方性を大きくす
るため、添加量は10〜50重量部が好ましい。100
重量部を越えると、レーザー焦点の環境安定性が低下
し、好ましくない。繊維状充填材(C)としては、ガラ
ス繊維、炭素繊維等が使用可能である。炭素繊維として
は、ポリアクリロニトリルを原料とするPAN系、ピッ
チを原料とするピッチ系繊維が用いられる。その中で
は、価格と性能の面からガラス繊維が好ましい。更に
(C)成分を添加する場合、レーザー焦点の環境安定性
を低下させないために、充填材の総含有量は200重量
部以下、好ましくは150重量部以下にする必要があ
る。
Further, in order to improve the mechanical properties, a fibrous filler (C) having an average fiber diameter of 5 to 20 μm and an average aspect ratio of 15 or more can be further contained in 5 to 100 parts by weight. The fibrous filler (C) is preferably added in an amount of 10 to 50 parts by weight in order to increase the anisotropy. 100
If the amount is more than the weight part, the environmental stability of the laser focus decreases, which is not preferable. As the fibrous filler (C), glass fiber, carbon fiber and the like can be used. As the carbon fiber, a PAN-based fiber using polyacrylonitrile as a raw material and a pitch-based fiber using pitch as a raw material are used. Among them, glass fiber is preferable in terms of price and performance. When the component (C) is further added, the total content of the filler must be 200 parts by weight or less, preferably 150 parts by weight or less in order not to lower the environmental stability of the laser focus.

【0010】本発明において使用する繊維状充填材、粒
状充填材はそのままでも使用できるが、一般的に用いら
れる公知の表面処理剤、収束剤を併用することができ
る。
The fibrous filler and granular filler used in the present invention can be used as they are, but commonly used known surface treating agents and sizing agents can be used in combination.

【0011】なお、液晶性ポリマー組成物に対し、核
剤、カーボンブラック等の顔料、酸化防止剤、安定剤、
可塑剤、滑剤、離型剤および難燃剤等の添加剤を添加し
て、所望の特性を付与した組成物も本発明で言う液晶性
ポリマー組成物の範囲に含まれる。
A nucleating agent, a pigment such as carbon black, an antioxidant, a stabilizer,
A composition to which additives such as a plasticizer, a lubricant, a release agent and a flame retardant are added to impart desired properties is also included in the range of the liquid crystal polymer composition according to the present invention.

【0012】本発明の液晶性ポリマー組成物は、1種若
しくは2種以上の充填材を用いることにより各々の欠点
を補い合うことにより機械的性質を損なうことなく、レ
ーザー焦点の環境安定性に優れた材料を得るものであ
り、更には成形体中の各充填材が均一に分散し、粒状充
填材の間に繊維充填材が存在するような分散状態で、よ
り高性能が発揮される。
The liquid crystalline polymer composition of the present invention makes use of one or more fillers to compensate for each of the drawbacks, thereby excelling in the environmental stability of the laser focus without impairing the mechanical properties. The material is obtained, and further, the fillers in the molded body are uniformly dispersed, and a higher performance is exhibited in a dispersed state in which the fiber filler is present between the granular fillers.

【0013】このような液晶性ポリマー組成物を製造す
るには、両者を前記組成割合で含有し、混練すればよ
い。通常、押出機で混練し、ペレット状に押し出し、射
出成形等に用いるが、この様な押出機による混練に限定
されるものではない。
In order to produce such a liquid crystalline polymer composition, both components may be contained in the above composition ratio and kneaded. Usually, the mixture is kneaded by an extruder, extruded into pellets, and used for injection molding, but is not limited to kneading by such an extruder.

【0014】[0014]

【実施例】以下、実施例により本発明を具体的に説明す
るが、本発明はこれらに限定されるものではない。な
お、評価方法などは以下の通りである。 (レーザー光軸の変動量)光ピックアップを成形し、そ
の成形品にレーザー光を発振し、測定反射面上でレーザ
ーを反射させる。その反射したレーザーをスクリーン上
に投影し、基準原点からの距離を測定し、測定反射面の
傾きのずれを求めた。 (制振性)厚さ1.6mm、幅10mm、長さ200m
mの成形品を用いて、JIS G0602「制振鋼板の
振動減衰特性試験方法」に準じ測定し、周波数100〜
1500Hzでの損失係数により評価を行った。損失係
数の逆数は、振動時の振動回数に比例するため、損失係
数の逆数が小さいほど振動が早くおさまり(制振性に優
れる)、損失係数が大きいほど制振性に優れることにな
る。 (低バリ性)厚さ3mm、直径80mmの円盤(中央ピ
ンゲート)の円周上に厚さ20μmのバリが発生する金
型を用いて、充填最低圧力で成形し、その時のバリ長さ
を2.5次元寸法測定器にて測定した。 (平均アスペクト比)ペレットを加熱して樹脂を熱分解
除去し、その残留物を拡大鏡を用いて観察して評価し
た。任意に選んだ繊維状充填材50本の長さを測定し
た。
EXAMPLES The present invention will now be described specifically with reference to examples, but the present invention is not limited to these examples. The evaluation method and the like are as follows. (Amount of fluctuation of laser optical axis) An optical pickup is molded, a laser beam is oscillated on the molded product, and the laser is reflected on the measurement reflection surface. The reflected laser was projected on a screen, the distance from the reference origin was measured, and the deviation of the inclination of the measured reflection surface was determined. (Vibration control) thickness 1.6mm, width 10mm, length 200m
Using a molded product of m, measurement was performed in accordance with JIS G0602 “Test method for vibration damping characteristics of damping steel sheet”, and a frequency of 100 to
The evaluation was performed based on the loss coefficient at 1500 Hz. Since the reciprocal of the loss coefficient is proportional to the number of vibrations at the time of vibration, the smaller the reciprocal of the loss coefficient, the faster the vibration subsides (the better the vibration damping property), and the larger the loss coefficient, the better the vibration damping property. (Low burrs) Using a mold in which burrs having a thickness of 20 μm are generated on the circumference of a disk (central pin gate) having a thickness of 3 mm and a diameter of 80 mm, molding is performed at the minimum filling pressure, and the burr length at that time is 2 Measured with a five-dimensional size measuring instrument. (Average aspect ratio) The pellets were heated to thermally decompose and remove the resin, and the residue was observed and evaluated using a magnifying glass. The length of fifty randomly selected fibrous fillers was measured.

【0015】実施例1〜3および比較例1〜3 液晶性ポリエステル(LCP;ポリプラスチックス
(株)製、ベクトラE950i)あるいはポリフェニレ
ンサルファイド樹脂(PPS)100重量部に対し、各
種充填材(シリカ、ガラスビーズ、炭酸カルシウム及び
ガラス繊維(チョップドストランド、長さ7mm))を
表1に示す割合でドライブレンドした後、二軸押出機に
て溶融混練し、ペレット化した。このペレットから射出
成形機により上記試験片を作製し、評価したところ、表
1に示す結果を得た。
Examples 1 to 3 and Comparative Examples 1 to 3 100 parts by weight of a liquid crystalline polyester (LCP; Vectra E950i, manufactured by Polyplastics Co., Ltd.) or 100 parts by weight of a polyphenylene sulfide resin (PPS) were mixed with various fillers (silica, Glass beads, calcium carbonate, and glass fibers (chopped strands, length 7 mm) were dry-blended at the ratios shown in Table 1 and then melt-kneaded with a twin-screw extruder to form pellets. The test piece was prepared from the pellet by an injection molding machine and evaluated, and the results shown in Table 1 were obtained.

【0016】[0016]

【表1】 [Table 1]

フロントページの続き (72)発明者 大竹 峰生 静岡県富士市宮島973番地 ポリプラスチ ックス株式会社内 Fターム(参考) 4J002 CF001 CF041 CF051 CF061 CF071 CF081 CF181 CL081 DA027 DA066 DE076 DE096 DE106 DE126 DE136 DE146 DE216 DE236 DG026 DG046 DG056 DJ006 DJ016 DJ036 DJ046 DL006 DL007 FA047 FA086 FD016 FD017 GP00Continuing from the front page (72) Inventor Mineo Otake 973 Miyajima, Fuji-shi, Shizuoka Prefecture F-term within Polyplastics Co., Ltd. DG056 DJ006 DJ016 DJ036 DJ046 DL006 DL007 FA047 FA086 FD016 FD017 GP00

Claims (7)

【特許請求の範囲】[Claims] 【請求項1】 液晶性ポリマー(A)100重量部に、
平均粒径0.1〜50μmの粒状充填材(B)を80〜
200重量部含有してなる、光ピックアップ用液晶性ポ
リマー組成物。
1. A liquid crystalline polymer (A) 100 parts by weight,
The amount of the particulate filler (B) having an average particle size of 0.1 to 50 μm is 80 to
A liquid crystalline polymer composition for an optical pickup, comprising 200 parts by weight.
【請求項2】 更に平均繊維径5〜20μmかつ平均ア
スペクト比15以上の繊維状充填材(C)を液晶性ポリ
マー(A)100重量部に対し5〜100重量部含有し
てなる、充填材の総含有量が200重量部以下であるこ
とを特徴とする請求項1記載の液晶性ポリマー組成物。
2. A filler comprising 5 to 100 parts by weight of a fibrous filler (C) having an average fiber diameter of 5 to 20 μm and an average aspect ratio of 15 or more based on 100 parts by weight of the liquid crystalline polymer (A). 2. The liquid crystalline polymer composition according to claim 1, wherein the total content of is less than 200 parts by weight.
【請求項3】 粒状充填材(B)がタルク、酸化チタン
から選ばれる1種又は2種以上であることを特徴とする
請求項1又は2記載の液晶性ポリマー組成物。
3. The liquid crystalline polymer composition according to claim 1, wherein the granular filler (B) is at least one selected from talc and titanium oxide.
【請求項4】 粒状充填材(B)がガラスビーズである
ことを特徴とする請求項1又は2記載の液晶性ポリマー
組成物。
4. The liquid crystalline polymer composition according to claim 1, wherein the particulate filler (B) is glass beads.
【請求項5】 粒状充填材(B)がシリカであることを
特徴とする請求項1又は2記載の液晶性ポリマー組成
物。
5. The liquid crystalline polymer composition according to claim 1, wherein the particulate filler (B) is silica.
【請求項6】 液晶性ポリマー(A)がポリエステルア
ミドであることを特徴とする請求項1〜5の何れか1項
に記載の液晶性ポリマー組成物。
6. The liquid crystal polymer composition according to claim 1, wherein the liquid crystal polymer (A) is a polyesteramide.
【請求項7】 請求項1〜6の何れか1項記載の液晶性
ポリマー組成物から製造された光ピックアップ。
7. An optical pickup manufactured from the liquid crystalline polymer composition according to claim 1.
JP7596999A 1999-03-19 1999-03-19 Liquid crystalline polymer composition for optical pickup and optical pickup Pending JP2000273292A (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
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JP2000273292A true JP2000273292A (en) 2000-10-03

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Cited By (9)

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Publication number Priority date Publication date Assignee Title
KR100679471B1 (en) * 1999-12-16 2007-02-07 스미또모 가가꾸 가부시키가이샤 Liquid crystal polyester resin composition and molded product thereof
WO2010067561A1 (en) * 2008-12-11 2010-06-17 ポリプラスチックス株式会社 Liquid crystalline resin composition
JP2011116842A (en) * 2009-12-02 2011-06-16 Nippon Kagaku Yakin Co Ltd Thermally conductive resin composition and molded article prepared by using the same
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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100679471B1 (en) * 1999-12-16 2007-02-07 스미또모 가가꾸 가부시키가이샤 Liquid crystal polyester resin composition and molded product thereof
WO2010067561A1 (en) * 2008-12-11 2010-06-17 ポリプラスチックス株式会社 Liquid crystalline resin composition
JPWO2010067561A1 (en) * 2008-12-11 2012-05-17 ポリプラスチックス株式会社 Liquid crystalline resin composition
JP5727229B2 (en) * 2008-12-11 2015-06-03 ポリプラスチックス株式会社 Liquid crystalline resin composition
JP2011116842A (en) * 2009-12-02 2011-06-16 Nippon Kagaku Yakin Co Ltd Thermally conductive resin composition and molded article prepared by using the same
US10941275B2 (en) 2013-03-13 2021-03-09 Ticona Llc Compact camera module
US11725095B2 (en) 2013-03-13 2023-08-15 Ticona Llc Compact camera module
US10829634B2 (en) 2017-12-05 2020-11-10 Ticona Llc Aromatic polymer composition for use in a camera module
US11725106B2 (en) 2017-12-05 2023-08-15 Ticona Llc Aromatic polymer composition for use in a camera module
US11702539B2 (en) 2020-02-26 2023-07-18 Ticona Llc Polymer composition for an electronic device
US11715579B2 (en) 2020-02-26 2023-08-01 Ticona Llc Electronic device
US11729908B2 (en) 2020-02-26 2023-08-15 Ticona Llc Circuit structure
US11728065B2 (en) 2020-07-28 2023-08-15 Ticona Llc Molded interconnect device

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