JP2007119669A - Polyamide resin composition - Google Patents
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本発明は軽量で、断熱性及び制振性に優れた成形品用ポリアミド樹脂組成物に関する。更に詳しくはエンジンルーム内部品という特殊な使用温度、湿度条件下において、制振性に優れ、かつ軽量で、断熱性に優れた成形品用ポリアミド樹脂組成物に関する。 The present invention relates to a polyamide resin composition for molded articles that is lightweight and excellent in heat insulating properties and vibration damping properties. More specifically, the present invention relates to a polyamide resin composition for molded articles having excellent vibration damping properties, light weight, and excellent heat insulation properties under special use temperature and humidity conditions as parts in an engine room.
ポリアミド６、ポリアミド６６に代表されるポリアミド樹脂は、エンジニアリングプラスチックとして優れた特性を有し、自動車、電気・電子など各種の工業分野において広く使用されている。 Polyamide resins typified by polyamide 6 and polyamide 66 have excellent characteristics as engineering plastics and are widely used in various industrial fields such as automobiles, electric / electronics and the like.
また、燃料規制や環境問題からの軽量化要請で金属代替材料としてポリアミド樹脂が広く使用されている一方、最近の環境問題の１つとして自動車などの騒音規制、特に起音体としてのエンジンに近接した部位で使用される部品に対しての制振性改良の要請が高まっている。 In addition, polyamide resin is widely used as a metal replacement material due to demands for weight reduction due to fuel regulations and environmental problems. On the other hand, as one of the recent environmental problems, noise regulation for automobiles, especially close to engines as sound generators. There is a growing demand for improved vibration damping for parts used in the parts.
しかしながら、ポリアミド６、ポリアミド６６の様なポリアミド樹脂では、騒音に最も影響する１〜２ｋＨｚ付近の騒音を低下させるのは難しい。 However, with a polyamide resin such as polyamide 6 or polyamide 66, it is difficult to reduce noise in the vicinity of 1 to 2 kHz that most affects noise.
そこで、制振性を改良する方法として、ポリアミド樹脂に、ガラス繊維やカオリン、マイカ、炭酸カルシウムなどの無機充填材を配合することにより、マトリクス相となるポリアミド樹脂と分散相となる無機充填材との界面における機械的摩擦に基づく減衰効果を利用することが提案されている（特許文献１参照）。 Therefore, as a method for improving the vibration damping property, by adding an inorganic filler such as glass fiber, kaolin, mica, calcium carbonate to the polyamide resin, a polyamide resin that becomes a matrix phase and an inorganic filler that becomes a dispersed phase It has been proposed to use a damping effect based on mechanical friction at the interface (see Patent Document 1).
また、制振性の温度依存性を小さくするために、熱可塑性エラストマーを添加したり、高温側における制振性の向上を目的として粘着性付与剤を配合する方法（特許文献２、特許文献３参照）やポリアミド樹脂自体のＴｇを高温側にシフトさせるべく異骨格の高分子を共重合あるいはポリマーブレンドで導入する方法（特許文献４、特許文献５参照）が提案されている。 Further, in order to reduce the temperature dependence of vibration damping properties, a method of adding a thermoplastic elastomer or blending a tackifier for the purpose of improving the vibration damping properties on the high temperature side (Patent Documents 2 and 3) And a method of introducing a polymer having a different skeleton by copolymerization or polymer blending in order to shift the Tg of the polyamide resin itself to the high temperature side (see Patent Documents 4 and 5).
しかしながら、無機充填材を配合する方法では、例えばガラス繊維を配合した場合には、弾性率が高くなることにより逆に制振性が大幅に低下してしまい、さらには熱伝導率が高くなるために、断熱性が悪くなるという問題がある。
また粘着性付与剤を配合する方法では、制振性を改良しようとすると粘着性付与剤を大量に配合する必要があり、そのために機械的特性が低下してしまったり、さらに、異骨格ポリマーを導入する方法でも制振性や遮音性の温度依存性は依然として大きいままであった。
However, in the method of blending the inorganic filler, for example, when glass fiber is blended, the vibration damping property is greatly reduced due to the increase in the elastic modulus, and the thermal conductivity is further increased. In addition, there is a problem that the heat insulation is deteriorated.
In addition, in the method of blending the tackifier, it is necessary to blend a large amount of the tackifier to improve the vibration damping property. Even with the introduced method, the temperature dependence of the vibration control and sound insulation still remained large.
本発明は、前記問題点を解決し、制振性に優れ、かつ軽量で、断熱性に優れ、インテークマニホールド、エンジンカバー、シリンダーヘッドカバー等の自動車エンジンルーム内で使用される部品用途に好適に使用できるポリアミド樹脂組成物を提供することを目的とする。 The present invention solves the above-described problems, is excellent in vibration damping properties, is lightweight, has excellent heat insulation, and is suitably used for parts used in an automobile engine room such as an intake manifold, an engine cover, and a cylinder head cover. An object of the present invention is to provide a polyamide resin composition that can be used.
本発明者らは、鋭意検討の結果、ポリアミド樹脂にガラスバルーンを配合することにより、制振性に優れ、かつ軽量で、断熱性に優れた成形品が得られることを見いだし、本発明に到達した。 As a result of intensive studies, the present inventors have found that a molded product having excellent vibration damping properties, light weight, and excellent heat insulation properties can be obtained by blending a glass balloon with a polyamide resin. did.
すなわち、本発明は、（Ａ）ポリアミド樹脂及び（Ｂ）ガラスバルーンを含むことを特徴とするポリアミド樹脂組成物に関するものである。
また、本発明は、（Ａ）ポリアミド樹脂、（Ｂ）ガラスバルーン、及び（Ｃ）ガラスバルーンを除く無機充填材を含むからなることを特徴とするポリアミド樹脂組成物に関するものである。
That is, this invention relates to the polyamide resin composition characterized by including (A) polyamide resin and (B) glass balloon.
The present invention also relates to a polyamide resin composition comprising (A) a polyamide resin, (B) a glass balloon, and (C) an inorganic filler excluding the glass balloon.
本発明のポリアミド樹脂組成物は、制振性に優れ、かつ軽量で、断熱性に優れており、インテークマニホールド、エンジンカバー、シリンダーヘッドカバー等の自動車エンジンルーム内で使用される部品用途に好適に使用できる。 The polyamide resin composition of the present invention has excellent vibration damping properties, is lightweight, has excellent heat insulation properties, and is suitably used for parts used in automobile engine rooms such as intake manifolds, engine covers, and cylinder head covers. it can.
本発明のポリアミド樹脂組成物は、（Ａ）ポリアミド樹脂、及び（Ｂ）ガラスバルーン、あるいはさらに（Ｃ）ガラスバルーンを除く無機充填材からなる。
本発明に用いられる（Ａ）ポリアミド樹脂は、ジアミンと二塩基酸とからなるか、またはラクタムもしくはアミノカルボン酸からなるか、またはこれらの２種以上の共重合体からなるものが挙げられる。
The polyamide resin composition of the present invention comprises (A) a polyamide resin and (B) a glass balloon, or (C) an inorganic filler excluding the glass balloon.
Examples of the (A) polyamide resin used in the present invention include a diamine and a dibasic acid, a lactam or an aminocarboxylic acid, or a copolymer of two or more of these.
ジアミンとしては、テトラメチレンジアミン、ヘキサメチレンジアミン、オクタメチレンジアミン、ノナメチレジアミン、ウンデカメチレンジアミン、ドデカメチレンジアミン等の脂肪族ジアミンや、メタキシリレンジアミン等の芳香族・環状構造を有するジアミンが挙げられる。
ジカルボン酸としては、アジピン酸、ヘプタンジカルボン酸、オクタンジカルボン酸、ノナンジカルボン酸、ウンデカンジカルボン酸、ドデカンジカルボン酸等の脂肪族ジアミンやテレフタル酸、イソフタル酸等の芳香族・環状構造を有するジカルボン酸が挙げられる。
Examples of diamines include aliphatic diamines such as tetramethylene diamine, hexamethylene diamine, octamethylene diamine, nonamethyle diamine, undecamethylene diamine, and dodecamethylene diamine, and diamines having aromatic and cyclic structures such as metaxylylene diamine. Can be mentioned.
Examples of the dicarboxylic acid include aliphatic diamines such as adipic acid, heptane dicarboxylic acid, octane dicarboxylic acid, nonane dicarboxylic acid, undecane dicarboxylic acid, and dodecane dicarboxylic acid, and dicarboxylic acids having aromatic / cyclic structures such as terephthalic acid and isophthalic acid. Can be mentioned.
ラクタムとしては、炭素数６〜１２のラクタム類であり、ε−カプロラクタム、エナントラクタム、ウンデカンラクタム、ドデカンラクタム、α−ピロリドン、α−ピペリドン等が挙げられる。また、アミノカルボン酸としては炭素数６〜１２のアミノカルボン酸であり、６−アミノカプロン酸、７−アミノヘプタン酸、９−アミノノナン酸、１１−アミノウンデカン酸、１２−アミノドデカン酸が挙げられる。 The lactam is a lactam having 6 to 12 carbon atoms, and includes ε-caprolactam, enantolactam, undecane lactam, dodecane lactam, α-pyrrolidone, α-piperidone and the like. The aminocarboxylic acid is an aminocarboxylic acid having 6 to 12 carbon atoms, and examples thereof include 6-aminocaproic acid, 7-aminoheptanoic acid, 9-aminononanoic acid, 11-aminoundecanoic acid, and 12-aminododecanoic acid.
ポリアミド樹脂の具体例としては、ポリアミド６、ポリアミド６６、ポリアミド１１、ポリアミド１２、ポリアミド６１０、ポリアミド６１２、ポリアミド６／６６等が挙げられる。 Specific examples of the polyamide resin include polyamide 6, polyamide 66, polyamide 11, polyamide 12, polyamide 610, polyamide 612, polyamide 6/66, and the like.
本発明で使用される（Ｂ）ガラスバルーンとは、ガラス微小中空球のことであり、一般に市販されている物を用いることができる。（Ｂ）ガラスバルーンは、平均粒径５〜２００μｍ、好ましくは１０〜１００μｍ、見かけ比重０．２〜１．０ｇ／ｃｃ、好ましくは０．３〜０．８ｇ／ｃｃ、耐圧強度４００ｋｇ／ｃｍ2以上であることが望ましい。平均粒径が２００μｍを超えると成形品の表面平滑性が低下して外観が悪化し、見かけ比重が０．２ｇ／ｃｃ未満であると、耐圧強度が低下し、樹脂成分と混合し溶融する際に、押出成形機や射出成形機の圧力やせん断力、および結晶性樹脂の固化時の収縮圧力により中空体が破壊されてしまう欠点が生じ、１．０ｇ／ｃｃを超えると、成形品の比重が高くなり、軽量化の目的が達成出来ない。
また、本発明における（Ｂ）ガラスバルーンは、あらかじめカップリング剤で処理しておくことも可能である。処理方法としては、例えば、溶融したガラスを高速で延伸しながら途中に設けたカップリング剤、集束剤塗布装置にて浸漬させてカップリング剤や集束剤を付着させる。
The (B) glass balloon used in the present invention is a glass micro hollow sphere, and a commercially available product can be used. (B) The glass balloon has an average particle size of 5 to 200 μm, preferably 10 to 100 μm, an apparent specific gravity of 0.2 to 1.0 g / cc, preferably 0.3 to 0.8 g / cc, and a pressure strength of 400 kg / cm 2. The above is desirable. When the average particle diameter exceeds 200 μm, the surface smoothness of the molded product is deteriorated and the appearance is deteriorated. When the apparent specific gravity is less than 0.2 g / cc, the pressure strength is reduced and the resin component is mixed and melted. In addition, the hollow body is destroyed due to the pressure and shear force of the extrusion molding machine and the injection molding machine, and the shrinkage pressure when the crystalline resin is solidified, and if it exceeds 1.0 g / cc, the specific gravity of the molded product And the purpose of weight reduction cannot be achieved.
Moreover, the (B) glass balloon in this invention can also be processed with a coupling agent in advance. As a processing method, for example, the molten glass is immersed in a coupling agent or sizing agent coating apparatus provided in the middle while being stretched at a high speed to adhere the coupling agent or sizing agent.
（Ｂ）ガラスバルーンの配合量は、ポリアミド樹脂組成物全体に対して５〜４０重量％が好ましく、更に好ましくは１０〜３０重量％である。配合量が５重量％未満では軽量化の目的が達成出来ず、また４０重量％を超えると成形性が著しく低下する。 (B) As for the compounding quantity of a glass balloon, 5 to 40 weight% is preferable with respect to the whole polyamide resin composition, More preferably, it is 10 to 30 weight%. If the blending amount is less than 5% by weight, the object of weight reduction cannot be achieved, and if it exceeds 40% by weight, the moldability is remarkably lowered.
本発明に使用する（Ｃ）ガラスバルーンを除く無機充填材（以下、単に無機充填材という）とは、一般的な無機充填材を使用できるが、上記無機充填材としては、硫酸カルシウム、珪酸カルシウム、クレー、珪藻土、タルク、アルミナ、珪砂、ガラス粉、酸化鉄、金属粉、グラファイト、炭化珪素、窒化珪素、シリカ、窒化ホウ素、窒化アルミニウム、カーボンブラック、雲母、ガラス板、セリサイト、パイロフィライト、アルミフレーク、黒鉛、シラスバルーン、金属バルーン、軽石、ガラス繊維、炭素繊維、ウイスカー、金属繊維、グラファイト繊維、シリコンカーバイト繊維、アスベスト、ウオラストナイト、水酸化アルミニウム、水酸化マグネシウム、水酸化ジルコニウム、塩基性炭酸マグネシウム、ドロマイト、ハイドロタルサイト、水酸化カルシウム、水酸化バリウム、酸化スズの水和物、硼砂等の無機金属化合物の水和物、硼酸亜鉛、メタ硼酸亜鉛、メタ硼酸バリウム、炭酸亜鉛、炭酸マグネシウム−カルシウム、炭酸カルシウム、炭酸バリウム、酸化マグネシウム、酸化モリブデン、酸化ジルコニウム、酸化スズ等が挙げられる。
これら無機充填材のなかでも本発明においてとりわけ好ましく用いられるのはガラス繊維である。
ガラス繊維としては、平均繊維径が３〜２０μｍ、好ましくは６〜１３μｍ、平均繊維長が１０〜１０００μｍ、好ましくは５０〜５００μｍである。
(C) The inorganic filler (hereinafter simply referred to as “inorganic filler”) excluding the glass balloon used in the present invention can be a general inorganic filler. Examples of the inorganic filler include calcium sulfate and calcium silicate. , Clay, diatomaceous earth, talc, alumina, silica sand, glass powder, iron oxide, metal powder, graphite, silicon carbide, silicon nitride, silica, boron nitride, aluminum nitride, carbon black, mica, glass plate, sericite, pyrophyllite , Aluminum flake, graphite, shirasu balloon, metal balloon, pumice, glass fiber, carbon fiber, whisker, metal fiber, graphite fiber, silicon carbide fiber, asbestos, wollastonite, aluminum hydroxide, magnesium hydroxide, zirconium hydroxide , Basic magnesium carbonate, dolomite, hydrotalcite , Hydrates of calcium hydroxide, barium hydroxide, tin oxide, hydrates of inorganic metal compounds such as borax, zinc borate, zinc metaborate, barium metaborate, zinc carbonate, magnesium carbonate-calcium, calcium carbonate, carbonic acid Examples include barium, magnesium oxide, molybdenum oxide, zirconium oxide, and tin oxide.
Among these inorganic fillers, glass fiber is particularly preferably used in the present invention.
The glass fiber has an average fiber diameter of 3 to 20 μm, preferably 6 to 13 μm, and an average fiber length of 10 to 1000 μm, preferably 50 to 500 μm.
該無機充填材の配合量は、ポリアミド樹脂組成物全体に対して５〜３０重量％が好ましい。配合量が３０重量％を超えると成形性、寸法安定性、耐衝撃性が低下する。 As for the compounding quantity of this inorganic filler, 5 to 30 weight% is preferable with respect to the whole polyamide resin composition. If the blending amount exceeds 30% by weight, the moldability, dimensional stability, and impact resistance deteriorate.
また、本発明のポリアミド樹脂組成物には、本発明の効果を損なわない範囲で他の成分、例えば、可塑剤、耐衝撃材、耐熱材、発泡剤、耐候剤、結晶核剤、結晶化促進剤、離型剤、滑剤、帯電防止剤、難燃剤、難燃助剤、顔料、染料等の機能性付与剤等を適宜配合することができる。 In addition, the polyamide resin composition of the present invention has other components such as a plasticizer, an impact-resistant material, a heat-resistant material, a foaming agent, a weathering agent, a crystal nucleating agent, and a crystallization promoting agent as long as the effects of the present invention are not impaired. A functional agent such as an agent, a release agent, a lubricant, an antistatic agent, a flame retardant, a flame retardant aid, a pigment, and a dye can be appropriately blended.
本発明のポリアミド樹脂組成物の製造方法は特に制限されるものではなく、例えば次の方法を適用することができる。
（Ａ）ポリアミド樹脂と（Ｂ）ガラスバルーン、あるいはさらに（Ｃ）ガラスバルーンを除く無機充填材の混合には、単軸、２軸の押出機、バンバリーミキサー、ニーダー、及びミキシングロールなど通常公知の溶融混練機が用いられる。例えば、２軸押出機を使用して、全ての原材料を配合後、溶融混練する方法、一部の原材料を配合後、溶融混練し、更に残りの原材料を配合し溶融混練する方法、あるいは一部の原材料を配合後、溶融混練中にサイドフィーダーを用いて残りの原材料を混合する方法など、いずれの方法を用いてもよい。特に（Ｃ）ガラスバルーンを除く無機充填材を混合する場合、（Ｂ）ガラスバルーンが混練中に割れないようにするために、（Ａ）ポリアミド樹脂の一部と（Ｂ）ガラスバルーンを混練し、別に（Ａ）ポリアミド樹脂の残部と（Ｃ）ガラスバルーンを除く無機充填材を混練し、次いで両者を溶融混練することが好ましい。
The manufacturing method in particular of the polyamide resin composition of this invention is not restrict | limited, For example, the following method is applicable.
For mixing (A) polyamide resin and (B) glass balloon, or (C) inorganic filler excluding glass balloon, generally known ones such as a single screw, twin screw extruder, Banbury mixer, kneader, and mixing roll are known. A melt kneader is used. For example, using a twin screw extruder, all raw materials are blended and then melt kneaded, some raw materials are blended, melt kneaded, and the remaining raw materials are blended and melt kneaded, or part After mixing these raw materials, any method may be used, such as a method of mixing the remaining raw materials using a side feeder during melt-kneading. Particularly when (C) an inorganic filler other than a glass balloon is mixed, in order to prevent the (B) glass balloon from cracking during kneading, (A) a part of the polyamide resin and (B) the glass balloon are kneaded. Separately, it is preferable that (A) the remainder of the polyamide resin and (C) the inorganic filler excluding the glass balloon are kneaded and then both are melt-kneaded.
本発明のポリアミド樹脂組成物から成形品を製造する方法については特に制限はなく、通常使用される熱可塑性樹脂の成形機、例えば、押出成形機、ブロー成形機、圧縮成形機、射出成形機等を用いて、各種形状に製造可能である。 The method for producing a molded product from the polyamide resin composition of the present invention is not particularly limited, and is usually a thermoplastic resin molding machine such as an extrusion molding machine, a blow molding machine, a compression molding machine, an injection molding machine, and the like. Can be used to produce various shapes.
本発明のポリアミド樹脂組成物は制振性、軽量化の要求される部品、例えば、自動車用部品、電気部品、家庭用品等に用いることができる。具体的には自動車のエンジン周りで使用される部品があり、特にインテークマニホールド、エンジンカバー、シリンダーヘッドカバー等に好適に用いられる。 The polyamide resin composition of the present invention can be used for parts that require vibration damping and light weight, such as automobile parts, electrical parts, and household products. Specifically, there are parts used around the engine of an automobile, and it is particularly preferably used for an intake manifold, an engine cover, a cylinder head cover, and the like.
以下、本発明を実施例及び比較例により更に詳細に説明するが、本発明はこれら実施例に限定されるものではない。
なお、実施例および比較例において使用した樹脂及び成形品の物性測定方法を以下に示す。
（１）引張強さおよび引張破壊ひずみ：ＩＳＯ５２７−１，２に従い、常温下、厚み４ｍｍの試験片を用いて引張速度５ｍｍ／ｍｉｎで試験を行った。（ｎ＝５）
（２）引張弾性率：ＩＳＯ５２７−１，２に従い、常温下、厚み４ｍｍの試験片を用いて引張速度１ｍｍ／ｍｉｎで試験を行った。（ｎ＝５）
（３）シャルピー衝撃強さ：ＩＳＯ１７９−１に従い、常温下、Ａノッチ入り厚み４ｍｍの試験片を用いてエッジワイズ衝撃試験を行った。（ｎ＝１０）
（４）比重：ＩＳＯ３１６７多目的試験片をＩＳＯ２９４−１およびＩＳＯ１８７４−２に従い、溶融樹脂温度２９０℃、金型温度８０℃、金型内平均射出速度２５０ｍｍ／ｓｅｃ、保圧６０ＭＰａ×２０ｓｅｃで成形後、試験片ストレート部を切削し、ガスピクノメータにて比重測定を行った。
（５）熱伝導率：ＩＳＯ３１６７多目的試験片をＩＳＯ２９４−１およびＩＳＯ１８７４−２に従い、溶融樹脂温度２９０℃、金型温度８０℃、金型内平均射出速度２５０ｍｍ／ｓｅｃ、保圧６０ＭＰａ×２０ｓｅｃで成形後、試験片の２０ｍｍ幅部を用いて、熱伝導率測定装置（アグネ製ＡＲＣ−ＴＣ−１０００型）にて熱線法による熱伝導率測定を行った。
（６）減衰比：幅１２．７ｍｍ×長さ１２７ｍｍ×厚み３．２ｍｍの試験片を溶融樹脂温度２９０℃、金型温度８０℃、保圧６０ＭＰａ×１５ｓｅｃで成形後、中央加振法により、加振機（ブリュエル・ケアー社製 ＴＹＰＥ４０８９）、インピーダンスヘッド（ブリュエル・ケアー社製 ＴＹＰＥ８００１）、ＦＦＴアナライザー（小野測器製 ＣＦ−５２２０）を用いて、２３℃中での二次共振点（１ｋＨｚ〜２ｋＨｚ付近）での減衰比を制振性として測定した。
EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention further in detail, this invention is not limited to these Examples.
In addition, the physical property measuring method of resin used in an Example and a comparative example and a molded article is shown below.
(1) Tensile strength and tensile fracture strain: In accordance with ISO527-1, 2, a test piece having a thickness of 4 mm was used at room temperature and a tensile rate of 5 mm / min. (N = 5)
(2) Tensile elastic modulus: According to ISO527-1, 2, a test piece having a thickness of 4 mm was used at room temperature and a tensile rate of 1 mm / min. (N = 5)
(3) Charpy impact strength: According to ISO179-1, an edgewise impact test was performed at room temperature using a test piece with A-notch thickness of 4 mm. (N = 10)
(4) Specific gravity: After molding ISO 3167 multipurpose test piece according to ISO 294-1 and ISO 1874-2 at a molten resin temperature of 290 ° C., a mold temperature of 80 ° C., an average injection speed of 250 mm / sec in the mold, and a holding pressure of 60 MPa × 20 sec. The straight part of the test piece was cut and the specific gravity was measured with a gas pycnometer.
(5) Thermal conductivity: ISO 3167 multi-purpose test piece was molded in accordance with ISO 294-1 and ISO 1874-2 at a molten resin temperature of 290 ° C., a mold temperature of 80 ° C., an average injection speed in the mold of 250 mm / sec, and a holding pressure of 60 MPa × 20 sec. Then, the heat conductivity measurement by a heat ray method was performed with the heat conductivity measuring apparatus (ARC-TC-1000 type | mold made from Agne) using the 20 mm width part of the test piece.
(6) Attenuation ratio: After molding a test piece having a width of 12.7 mm, a length of 127 mm, and a thickness of 3.2 mm at a molten resin temperature of 290 ° C., a mold temperature of 80 ° C., and a holding pressure of 60 MPa × 15 sec, by a central vibration method, Using a vibrator (TYPE 4089 manufactured by Brüel & Kjær), an impedance head (TYPE 8001 manufactured by Brüel & Kjær), and an FFT analyzer (CF-5220 manufactured by Ono Sokki Co., Ltd.), the secondary resonance point (23 kHz to 23 ° C.) The damping ratio in the vicinity of 2 kHz was measured as the damping property.
・ポリアミド樹脂
ＰＡ６：ポリアミド６（宇部興産（株）製 １０１５Ｂ）
・ガラスバルーン
ＧＢ：（住友スリーエム株式会社製 グラスバブルスＳ６０ＨＳ）
・ガラス繊維
ＧＦ：繊維径１０．５μｍ（日本電気硝子株式会社製 ＥＣＳ０３Ｔ２４９Ｈ）
-Polyamide resin PA6: Polyamide 6 (manufactured by Ube Industries, Ltd. 1015B)
・ Glass balloon GB: (Glass Bubbles S60HS manufactured by Sumitomo 3M Limited)
Glass fiber GF: Fiber diameter 10.5 μm (ECS03T249H manufactured by Nippon Electric Glass Co., Ltd.)
実施例１〜３
表１に記載したポリアミド樹脂、ガラスバルーンあるいはさらにガラス繊維をＴＥＸ４４ＨＣＴ二軸混練機で溶融混練し、目的とするポリアミド樹脂組成物ペレットを作成した。
次に得られたペレットを溶融樹脂温度２９０℃、金型温度８０℃、金型内平均射出速度２５０ｍｍ／ｓｅｃ、保圧６０ＭＰａ×２０ｓｅｃで射出成形し、各種試験片を製造し、各種物性、比重、熱伝導率および制振性を評価した。得られた結果を表１に示す。
Examples 1-3
The polyamide resin, glass balloon or glass fiber described in Table 1 was melt-kneaded with a TEX44HCT biaxial kneader to prepare the desired polyamide resin composition pellets.
Next, the obtained pellets were injection molded at a molten resin temperature of 290 ° C., a mold temperature of 80 ° C., an in-mold average injection speed of 250 mm / sec, and a holding pressure of 60 MPa × 20 sec to produce various test pieces, and various physical properties and specific gravity. The thermal conductivity and damping properties were evaluated. The obtained results are shown in Table 1.
比較例１
比較例に記載のＰＡ６ペレットを溶融樹脂温度２９０℃、金型温度８０℃、金型内平均射出速度２５０ｍｍ／ｓｅｃ、保圧６０ＭＰａ×２０ｓｅｃで射出成形し、各種試験片を製造し、各種物性、比重、熱伝導率および制振性を評価した。得られた結果を表１に示す。
Comparative Example 1
The PA6 pellets described in the comparative example were injection molded at a molten resin temperature of 290 ° C., a mold temperature of 80 ° C., an average in-mold injection speed of 250 mm / sec, and a holding pressure of 60 MPa × 20 sec to produce various test pieces, Specific gravity, thermal conductivity and damping properties were evaluated. The obtained results are shown in Table 1.
比較例２
表１に記載したポリアミド樹脂およびガラス繊維をＴＥＸ４４ＨＣＴ二軸混練機で溶融混練し、目的とするポリアミド樹脂組成物ペレットを作成した。
次に得られたペレットを溶融樹脂温度２９０℃、金型温度８０℃、金型内平均射出速度２５０ｍｍ／ｓｅｃ、保圧６０ＭＰａ×２０ｓｅｃで射出成形し、各種試験片を製造し、各種物性、比重、熱伝導率および制振性を評価した。得られた結果を表１に示す。
Comparative Example 2
The polyamide resin and glass fiber described in Table 1 were melt-kneaded with a TEX44HCT twin-screw kneader to prepare a target polyamide resin composition pellet.
Next, the obtained pellets were injection molded at a molten resin temperature of 290 ° C., a mold temperature of 80 ° C., an in-mold average injection speed of 250 mm / sec, and a holding pressure of 60 MPa × 20 sec to produce various test pieces, and various physical properties and specific gravity. The thermal conductivity and damping properties were evaluated. The obtained results are shown in Table 1.
Claims (11)
The molded article according to claim 9, wherein the automotive part is an intake manifold.
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| JP2005316012A JP2007119669A (en) | 2005-10-31 | 2005-10-31 | Polyamide resin composition |
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