JPH05192978A - Molding method for liquid crystal composite body - Google Patents
Molding method for liquid crystal composite bodyInfo
- Publication number
- JPH05192978A JPH05192978A JP4007623A JP762392A JPH05192978A JP H05192978 A JPH05192978 A JP H05192978A JP 4007623 A JP4007623 A JP 4007623A JP 762392 A JP762392 A JP 762392A JP H05192978 A JPH05192978 A JP H05192978A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- liquid crystal
- crystal resin
- matrix
- composite body
- 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.)
- Granted
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 45
- 238000000465 moulding Methods 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000002131 composite material Substances 0.000 title description 4
- 239000011347 resin Substances 0.000 claims abstract description 52
- 229920005989 resin Polymers 0.000 claims abstract description 52
- 239000011159 matrix material Substances 0.000 claims abstract description 18
- 239000000805 composite resin Substances 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 6
- 239000011342 resin composition Substances 0.000 claims abstract description 4
- 230000007704 transition Effects 0.000 claims abstract description 4
- 238000001125 extrusion Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 abstract description 6
- 239000000835 fiber Substances 0.000 abstract description 3
- 230000009471 action Effects 0.000 abstract description 2
- 238000010008 shearing Methods 0.000 abstract description 2
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000004417 polycarbonate Substances 0.000 description 5
- 229920000515 polycarbonate Polymers 0.000 description 5
- -1 polypropylene Polymers 0.000 description 5
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 4
- 239000011151 fibre-reinforced plastic Substances 0.000 description 4
- 229920001707 polybutylene terephthalate Polymers 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012778 molding material Substances 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920001955 polyphenylene ether Polymers 0.000 description 2
- 229920006380 polyphenylene oxide Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 239000004727 Noryl Substances 0.000 description 1
- 229920001207 Noryl Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229920006026 co-polymeric resin Polymers 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000012438 extruded product Nutrition 0.000 description 1
- 239000003733 fiber-reinforced composite Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920006149 polyester-amide block copolymer Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Classifications
-
- B29C47/92—
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は液晶樹脂複合体、特に液
晶樹脂の繊維化による補強効果の高い液晶樹脂複合体の
成形方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal resin composite, and more particularly to a method for molding a liquid crystal resin composite having a high reinforcing effect by fiberizing the liquid crystal resin.
【０００２】[0002]
【従来の技術】近年、繊維強化プラスチック（ＦＲＰ）
複合体の加工性を改善すべく、これに代わり、熱可塑性
樹脂からなるマトリックス樹脂に液晶樹脂を配合し、成
形時に液晶樹脂を繊維化して補強する複合体が提案され
るに至っている（特開昭６２−１１６６６６号、特開平
１−１５８０７４号）。本発明者らはこの種液晶樹脂複
合体の物性を使用して上記ＦＲＰに代替することができ
る再生可能な成型品を成形したが、従来のＦＲＰ成形品
に比して繊維強化程度が低く、所望の構造強度を備える
に至っていない。2. Description of the Related Art In recent years, fiber reinforced plastic (FRP)
In order to improve the processability of the composite, instead of this, a composite has been proposed in which a liquid crystal resin is blended with a matrix resin made of a thermoplastic resin, and the liquid crystal resin is fibrillated and reinforced during molding (Japanese Patent Application Laid-Open No. 2000-242242). 62-116666, JP-A-1-158807). The present inventors used the physical properties of this type of liquid crystal resin composite to mold a reproducible molded product that can substitute for the above FRP, but the degree of fiber reinforcement is lower than that of a conventional FRP molded product, It has not reached the desired structural strength.
【０００３】[0003]
【発明が解決しようとする課題】このような樹脂組成物
の物性改善のためにガラス繊維、無機充填剤を添加する
ことが提案されている（特開平１−３２０１２８号）
が、かかる解決方法は成型品の再生能を害する結果を招
来し、望ましくない。そこで、本発明は成型品の再生能
を害することなく、成型品の構造強度を向上させるには
液晶樹脂複合体としての例えばペレット材などにおける
液晶樹脂自体の繊維化状態を改善する必要があることに
鑑み、補強効果の高い液晶樹脂複合体の成形方法を提供
することを目的とする。In order to improve the physical properties of such a resin composition, it has been proposed to add glass fiber and an inorganic filler (JP-A-1-320128).
However, such a solution is undesired because it results in impairing the reproducibility of the molded product. Therefore, according to the present invention, in order to improve the structural strength of the molded product without impairing the recyclability of the molded product, it is necessary to improve the fibrous state of the liquid crystal resin itself in a liquid crystal resin composite such as a pellet material. In view of the above, an object of the present invention is to provide a method for molding a liquid crystal resin composite having a high reinforcing effect.
【０００４】[0004]
【課題を解決するための手段】本発明は液晶樹脂の補強
効果を高めるためには液晶樹脂複合体において、マトリ
ックス樹脂内での液晶樹脂の繊維化とその延伸化の相互
作用を利用する必要があることに着目してなされたもの
で、少なくとも熱可塑性樹脂からなるマトリックス樹脂
と液晶樹脂とからなる組成物を使用して繊維化された液
晶樹脂により強化された液晶樹脂複合体の製造するにあ
たり、上記樹脂組成物をマトリックス樹脂の溶融温度以
上液晶樹脂の液晶転移温度以上の温度で樹脂に作用する
見かけの剪断速度３×１０2〜１０5sec-1で押し出し、
延伸比１１〜１２０で延伸する液晶樹脂複合体の成形方
法にある。According to the present invention, in order to enhance the reinforcing effect of the liquid crystal resin, it is necessary to utilize the interaction between the fiberization of the liquid crystal resin and its stretching in the matrix resin in the liquid crystal resin composite. What was made in view of that, in producing a liquid crystal resin composite reinforced by a liquid crystal resin fibrillated using a composition comprising at least a matrix resin made of a thermoplastic resin and a liquid crystal resin, The resin composition is extruded at an apparent shear rate of 3 × 10 2 to 10 5 sec -1 , which acts on the resin at a temperature not lower than the melting temperature of the matrix resin and not lower than the liquid crystal transition temperature of the liquid crystal resin,
It is a method for molding a liquid crystal resin composite which is stretched at a stretching ratio of 11 to 120.
【０００５】本発明で使用される熱可塑性樹脂として
は、ポリプロピレン、ポリエチレン、ポリスチレン、Ａ
ＢＳ、ポリアミド（ナイロン）、ポリカーボネート、ポ
リブチレンテレフタレート、ポリエチレンテレフタレー
ト、変性ＰＰＥ（ポリフェニレンエーテル）、ポリフェ
ニレンサルファイド、ポリエ・テルサルフォン等一般に
熱可塑性樹脂として分類されるもの、及びこれらの変性
品、ブレンド品（ポリマーアロイ）を使用することがで
きる。As the thermoplastic resin used in the present invention, polypropylene, polyethylene, polystyrene, A
Those generally classified as thermoplastic resins such as BS, polyamide (nylon), polycarbonate, polybutylene terephthalate, polyethylene terephthalate, modified PPE (polyphenylene ether), polyphenylene sulfide, and poly tersulphone, and their modified products and blended products ( Polymer alloys) can be used.
【０００６】他方、液晶樹脂としては上記マトリックス
樹脂より融点が高いもの、好ましくは２０℃以上高いも
のであれば、特に限定されるものでないが、熱可塑性液
晶ポリエステル、熱可塑性液晶ポリエステルアミドが好
ましく、具体的には商品名ベクトラ、エコノール、ザイ
ダー等の液晶樹脂が市販されている。On the other hand, the liquid crystal resin is not particularly limited as long as it has a melting point higher than that of the above matrix resin, preferably 20 ° C. or higher, but thermoplastic liquid crystal polyester and thermoplastic liquid crystal polyesteramide are preferable, Specifically, liquid crystal resins such as trade names Vectra, Econol, and Zider are commercially available.
【０００７】マトリックス樹脂に対する液晶樹脂の配合
は組成物全体としてその相反転以下の繊維化可能領域と
なるように調整配合する必要があり(図１参照）、例え
ば、マトリックス樹脂がポリアミド樹脂である場合は４
０〜８０重量％、ＡＢＳ（アクリルーブタジエンースチ
レン共重合体）樹脂の場合は３０〜７５重量％、ポリカ
ーボネート（ＰＣ）／ＡＢＳ樹脂の場合は３〜７０重量
％、ＰＣ／ＰＢＴ樹脂の場合は２〜６０重量％、ポリフ
ェニレンオキシド（ＰＰ０）／ナイロン（ＰＡ６）の場
合は３〜６５重量％、変性ＰＰＯ樹脂の場合は３〜６０
重量％、ポリプロピレンの場合は２〜７０重量％、ポリ
カーボネートの場合は３〜７０重量％、ＰＢＴ樹脂の場
合は１０〜７０重量％の範囲が適当である。It is necessary to mix and mix the liquid crystal resin with the matrix resin so that the composition as a whole has a fiber-forming region below its phase inversion (see FIG. 1). For example, when the matrix resin is a polyamide resin. Is 4
0 to 80% by weight, ABS (acrylic-butadiene-styrene copolymer) resin 30 to 75% by weight, polycarbonate (PC) / ABS resin 3 to 70% by weight, PC / PBT resin 2 to 60% by weight, 3 to 65% by weight in the case of polyphenylene oxide (PP0) / nylon (PA6), 3 to 60 in the case of modified PPO resin
%, In the case of polypropylene, 2 to 70% by weight, in the case of polycarbonate, 3 to 70% by weight, and in the case of PBT resin, 10 to 70% by weight.
【０００８】上記繊維化可能領域の組成物をマトリック
ス樹脂の溶融温度以上、かつ液晶樹脂の液晶転移温度以
上の温度で成形する必要があり、その際の押し出し時の
樹脂に作用する見かけの剪断速度は３×１０2〜１０5se
c-1、好ましくは３×１０2〜１０4sec-1、より好ましく
は３×１０2〜５×１０3sec-1とする必要がある。この
範囲の剪断速度で押し出しを受けた成形用素材は、以下
の延伸作用により引張強度の向上を受け易い繊維化状態
が得られる。なお、押し出し形態はストランドまたはフ
ィルム形態のいずれでもよい。It is necessary to mold the composition in the fibratable region at a temperature not lower than the melting temperature of the matrix resin and not lower than the liquid crystal transition temperature of the liquid crystal resin, and the apparent shear rate acting on the resin at the time of extrusion at that time. Is 3 × 10 2 to 10 5 se
It should be c −1 , preferably 3 × 10 2 to 10 4 sec −1 , more preferably 3 × 10 2 to 5 × 10 3 sec −1 . The molding material extruded at a shearing rate in this range can be obtained in a fibrous state in which the tensile strength is easily improved by the following stretching action. The extruded form may be either strand or film form.
【０００９】押し出されたストランドなどは一旦冷却
し、または冷却しないで連続して延伸処理に付される。
その延伸比（押出品の断面積／延伸後の断面積）は１1
以上１２０以下が好ましい。１１未満では引張強度向上
が望めず、１２０を越えて延伸しても引張強度の向上に
寄与しないからである。延伸されたストランドまたはフ
ィルムは所定の寸法に切断され、成形用素材として使用
されるか、またはそのまま最終的成形品として用いるこ
ともできる。The extruded strand or the like is once cooled or is continuously drawn without cooling.
The stretch ratio (cross-sectional area of extruded product / cross-sectional area after stretching) is 11
It is preferably 120 or more and 120 or less. If it is less than 11, the tensile strength cannot be improved, and if it is stretched beyond 120, it does not contribute to the improvement of the tensile strength. The drawn strand or film is cut into a predetermined size and used as a material for molding, or can be used as it is as a final molded product.
【００１０】[0010]
【作用効果】本発明によれば、樹脂に作用する見かけの
剪断速度３×１０2〜１０5sec-1で押し出されたマトリ
ックス樹脂内の液晶樹脂は特に１１〜１２０の延伸比に
おける延伸による引張強度(HPa)増加が著しいのに対し
(図２(a))、剪断速度が過小な場合（１０2sec-1以下）
は図２(b)および(c)に示すように、延伸による引張強度
の増加効果は飽和する。したがって、本発明によれば、
液晶樹脂を補強材として用いる再生可能な繊維化強化複
合体において補強効果の高い複合成形用素材を提供する
ことができる。According to the present invention, the liquid crystal resin in the matrix resin extruded at the apparent shear rate of 3 × 10 2 to 10 5 sec -1 acting on the resin is stretched by stretching at a stretching ratio of 11 to 120. While the strength (HPa) increases remarkably
(Fig. 2 (a)) When the shear rate is too low (10 2 sec -1 or less)
As shown in FIGS. 2 (b) and 2 (c), the effect of increasing the tensile strength by stretching is saturated. Therefore, according to the present invention,
It is possible to provide a composite molding material having a high reinforcing effect in a recyclable fiber-reinforced composite that uses a liquid crystal resin as a reinforcing material.
【００１１】[0011]
【実施例】以下、本発明を具体例に基づいて説明する。 （実施例１）マトリックス樹脂としてＰＣ／ＡＢＳ（商
品名テクニエースＴ１０５、住友ノーガタック社製造）
８０重量％、液晶樹脂として芳香族ポリエステル（商品
名ベクトラＡ９５０、ポリプラスチックス社製造）ペレ
ット２０重量％を混合し、２軸押出機（型式ＳＴ−３０
−Ｓ２−３６Ｌ、プラスチック工学研究所社製造）を用
いてスクリュー径３０mm、樹脂温度２９０℃、スクリュ
ー回転数１００rpmに設定し、剪断速度１，７００sec-1
でストランドを押し出し、これを延伸機（自社製）で延
伸した。上記成形方法において延伸比を１０〜１３０の
範囲で変化させ、引張強さを測定し、図２に示す結果を
得た。また、上記成形方法において、押し出し時の樹脂
にかかる見かけの剪断速度１０2sec-1以下では延伸比を
変化させても引張強さはほとんど変化しなかった。EXAMPLES The present invention will be described below based on specific examples. (Example 1) PC / ABS as a matrix resin (trade name: Techniace T105, manufactured by Sumitomo Nogatak Co., Ltd.)
80% by weight and 20% by weight of aromatic polyester (trade name Vectra A950, manufactured by Polyplastics Co., Ltd.) pellets as a liquid crystal resin were mixed, and a twin-screw extruder (model ST-30) was used.
-S2-36L, manufactured by Plastic Engineering Laboratory Co., Ltd.), the screw diameter is 30 mm, the resin temperature is 290 ° C., and the screw rotation speed is 100 rpm, and the shear rate is 1,700 sec −1.
The strand was extruded with and stretched with a stretching machine (made in-house). In the above molding method, the stretching ratio was changed in the range of 10 to 130, the tensile strength was measured, and the results shown in FIG. 2 were obtained. Further, in the above-mentioned molding method, at an apparent shear rate of 10 2 sec -1 or less applied to the resin at the time of extrusion, the tensile strength hardly changed even when the stretch ratio was changed.
【００１２】（実施例２）マトリックス樹脂としてマト
リックス樹脂変性ＰＰＯ（商品名ノリルＳＥ９０、日本
ジーイープラスチックス社製造）を使用する以外は実施
例１と同様に行い、実施例１と同様の結果を得た。(Example 2) The same results as in Example 1 were obtained except that the matrix resin-modified PPO (trade name: Noryl SE90, manufactured by GE Plastics Co., Ltd.) was used as the matrix resin. It was
【図１】 液晶樹脂複合体のマトリックス樹脂に対する
液晶樹脂の含有量が及ぼす複合体の状態変化を示す説明
図である。FIG. 1 is an explanatory diagram showing a change in a state of a liquid crystal resin composite, which is affected by a content of the liquid crystal resin with respect to a matrix resin.
【図２】 液晶樹脂複合体における押し出し時に樹脂に
作用する見かけの剪断速度と延伸比の相互作用が引張強
度に及ぼす影響を示すグラフである。FIG. 2 is a graph showing the influence of the interaction between the apparent shear rate acting on the resin during extrusion and the stretch ratio in the liquid crystal resin composite on the tensile strength.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 金子 満晴 広島県安芸郡府中町新地３番１号 マツダ 株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsuharu Kaneko 3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima Mazda Motor Corporation
Claims (1)
ックス樹脂と液晶樹脂とからなる組成物を使用して繊維
化された液晶樹脂により強化された液晶樹脂複合体を製
造するにあたり、 上記樹脂組成物をマトリックス樹脂の溶融温度以上、か
つ液晶樹脂の液晶転移温度以上の温度で樹脂に作用する
見かけの剪断速度３×１０2〜１０5sec-1で押し出し、
延伸比１１〜１２０で延伸することを特徴とする液晶樹
脂複合体の成形方法。1. When producing a liquid crystal resin composite reinforced with a fiberized liquid crystal resin using a composition comprising at least a thermoplastic resin matrix resin and a liquid crystal resin, the resin composition is used as a matrix. Extrusion at an apparent shear rate of 3 × 10 2 to 10 5 sec −1 that acts on the resin at a temperature above the melting temperature of the resin and above the liquid crystal transition temperature of the liquid crystal resin,
A method for molding a liquid crystal resin composite, which comprises stretching at a stretching ratio of 11 to 120.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00762392A JP3212659B2 (en) | 1992-01-20 | 1992-01-20 | Liquid crystal resin composite molding method |
| DE4301423A DE4301423C2 (en) | 1992-01-20 | 1993-01-20 | Process for forming a liquid crystal resin composite and molding a product therefrom |
| KR1019930000844A KR960014548B1 (en) | 1992-01-20 | 1993-01-20 | Molding method of liquid crystal resin composite and apparatus therefor |
| US08/004,901 US5626703A (en) | 1992-01-20 | 1993-01-21 | Method for preparing a liquid crystal resin composite material and molding a product from the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00762392A JP3212659B2 (en) | 1992-01-20 | 1992-01-20 | Liquid crystal resin composite molding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05192978A true JPH05192978A (en) | 1993-08-03 |
| JP3212659B2 JP3212659B2 (en) | 2001-09-25 |
Family
ID=11670950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP00762392A Expired - Lifetime JP3212659B2 (en) | 1992-01-20 | 1992-01-20 | Liquid crystal resin composite molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3212659B2 (en) |
-
1992
- 1992-01-20 JP JP00762392A patent/JP3212659B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP3212659B2 (en) | 2001-09-25 |
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