JP2000273300A - Polyamide resin composition and injection molded product therefrom - Google Patents
Polyamide resin composition and injection molded product therefromInfo
- Publication number
- JP2000273300A JP2000273300A JP11079373A JP7937399A JP2000273300A JP 2000273300 A JP2000273300 A JP 2000273300A JP 11079373 A JP11079373 A JP 11079373A JP 7937399 A JP7937399 A JP 7937399A JP 2000273300 A JP2000273300 A JP 2000273300A
- Authority
- JP
- Japan
- Prior art keywords
- polyamide
- weight
- resin composition
- polyamide resin
- glass fiber
- 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
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は優れた成形品外観を
持ち、高い強度及び剛性を有し、ガスアシスト射出成形
によって、成形品中、均一な中空部長さ及び中空厚みを
有する成形品を得ることができるポリアミド樹脂組成物
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a molded article having excellent appearance, high strength and rigidity, and having a uniform hollow portion length and hollow thickness in the molded article by gas-assisted injection molding. And a polyamide resin composition.
【０００２】[0002]
【従来の技術】ポリアミド樹脂は、機械的および熱的性
質並びに耐油性に優れているため、自動車や電気・電子
製品等の部品に広く用いられている。また、ポリアミド
にガラス繊維を配合した強化ポリアミド樹脂は、機械的
特性、耐熱性、耐薬品性等が大きく向上するために、従
来金属製であった部品を、軽量化および工程の合理化等
の観点から強化ポリアミド樹脂で代替することも可能と
なり、近年積極的にその採用が進められている。2. Description of the Related Art Polyamide resins are widely used for parts such as automobiles and electric / electronic products because of their excellent mechanical and thermal properties and oil resistance. In addition, the reinforced polyamide resin in which glass fiber is mixed with polyamide greatly improves mechanical properties, heat resistance, chemical resistance, etc. Can be replaced with a reinforced polyamide resin, and its use has been actively promoted in recent years.
【０００３】強化ポリアミド樹脂を用いて射出成形を行
い、金属代替用成形品を得ようとした場合、成形品のデ
ザインによっては、成形品にいわゆる、そりやひけを生
じ、成形品外観が著しく損ねられる場合があり、それら
の改善が求められていた。その改善方法の一つとして、
従来より、ガスアシスト射出成形法が提案され、広く実
用化されている。 この方法は、金型に設けられたキャ
ビティ内に溶融樹脂を射出している間に、あるいは溶融
樹脂の射出完了後に、キャビティ内の溶融樹脂中に加圧
流体を注入して成形品内部に中空部を形成させる方法で
ある。[0003] When an injection molding is performed using a reinforced polyamide resin to obtain a molded product for substituting a metal, depending on the design of the molded product, so-called warpage or sink occurs in the molded product, and the appearance of the molded product is significantly impaired. In some cases, such improvements were required. As one of the improvement methods,
2. Description of the Related Art Conventionally, a gas assist injection molding method has been proposed and widely used. According to this method, a pressurized fluid is injected into the molten resin in the cavity while the molten resin is being injected into the cavity provided in the mold or after the injection of the molten resin is completed. This is a method of forming a part.
【０００４】しかしながら、ガラス繊維強化ポリアミド
樹脂、特に高強度化のために高濃度にガラス繊維を含有
する強化ポリアミド樹脂を用い、ガスアシスト射出成形
を実施した場合、その成形品外表面の品質が低下した
り、中空部内表面にガラス繊維が露出したり、あるいは
凝集したガラス繊維塊により、中空部が不均一となった
りして、ガスアシスト射出成形法本来の目的である成形
品のそりやひけの解消や軽量化を達成できない場合が多
く、改善が求められている。However, when gas-assisted injection molding is performed using a glass fiber reinforced polyamide resin, particularly a reinforced polyamide resin containing glass fiber at a high concentration for increasing the strength, the quality of the outer surface of the molded product deteriorates. The glass fiber is exposed on the inner surface of the hollow part, or the hollow part becomes non-uniform due to the aggregated glass fiber lump, and warpage or sinking of the molded product, which is the original purpose of the gas assist injection molding method. In many cases, elimination and weight reduction cannot be achieved, and improvement is required.
【０００５】このため、より少ない量のガラス繊維と他
の粒状無機充填剤とを含有させた強化ポリアミド樹脂を
用いる方法や、ガラス繊維含有強化ポリアミド樹脂のペ
レットとガラス繊維をほとんど含まないポリアミド樹脂
ペレットとをガスアシスト射出成形時にブレンドして利
用する方法（特開平９−１１２６９号公報）等が提案さ
れている。 しかしながら優れた成形品外観を有し、且
つ金属代替をも可能にする高い強度及び剛性を有し、そ
の上成形品中、均一な中空部長さ及び中空厚みを有する
成形品を得ることは極めて難しかった。[0005] For this reason, a method using a reinforced polyamide resin containing a smaller amount of glass fiber and other particulate inorganic filler, a pellet of a glass fiber-containing reinforced polyamide resin and a polyamide resin pellet containing almost no glass fiber are used. (Japanese Patent Laid-Open No. 9-11269) and the like have been proposed. However, it is extremely difficult to obtain a molded article having an excellent appearance of a molded article, and having high strength and rigidity enabling metal replacement, and having a uniform hollow portion length and hollow thickness in the molded article. Was.
【０００６】[0006]
【発明が解決しようとする課題】本発明の課題は、優れ
た成形品外観を持ち、高い強度及び剛性を有し、ガスア
シスト射出成形によって、成形品中、均一な中空部長さ
及び中空厚みを有する成形品となすことができるポリア
ミド樹脂組成物を提供することである。SUMMARY OF THE INVENTION An object of the present invention is to provide a molded article having excellent appearance, high strength and rigidity, and a uniform hollow portion length and a uniform hollow thickness in the molded article by gas-assisted injection molding. An object of the present invention is to provide a polyamide resin composition which can be formed into a molded article having the same.
【０００７】[0007]
【課題を解決するための手段】本発明者等は上記課題を
解決するために鋭意検討した結果、ガラス繊維とガラス
繊維以外の無機充填剤を含み、且つ含まれるガラス繊維
の径を特定の範囲とした特定のポリアミド樹脂組成物を
用いた場合に、優れた成形品外観を持ち、且つ高い強度
及び剛性を有し、更にガスアシスト射出成形を実施した
際に均一な中空部長さ及び中空厚みを有する成形品が得
られることを初めて見い出し本発明に至った。Means for Solving the Problems The present inventors have conducted intensive studies in order to solve the above-mentioned problems, and as a result, it has been determined that the glass fiber contains a glass fiber and an inorganic filler other than the glass fiber, and the diameter of the glass fiber contained is within a specific range. When a specific polyamide resin composition is used, it has an excellent molded product appearance, has high strength and rigidity, and further has a uniform hollow portion length and hollow thickness when gas assisted injection molding is performed. It has been found for the first time that a molded article having the same can be obtained, and the present invention has been achieved.
【０００８】すなわち、本発明の第一の発明は、ポリア
ミド（Ａ）を３０〜７０重量％、平均繊維径が１５〜３
０μｍであるガラス繊維（Ｂ）を１０〜６０重量％、及
びガラス繊維を除く無機充填剤（Ｃ）を１０〜６０重量
％含むことを特徴とするポリアミド樹脂組成物である。
第二の発明は、(a1)半芳香族ポリアミド５０〜１００重
量％と(a2)脂肪族ポリアミド０〜５０重量％とからな
り、結晶化温度が２１０℃以下であるポリアミド（Ａ）
を３０〜７０重量％、平均繊維径が１５〜３０μｍであ
るガラス繊維（Ｂ）を１０〜６０重量％、及びガラス繊
維を除く無機充填剤（Ｃ）を１０〜６０重量％含むこと
を特徴とするポリアミド樹脂組成物である。That is, in the first invention of the present invention, the polyamide (A) contains 30 to 70% by weight and has an average fiber diameter of 15 to 3%.
A polyamide resin composition comprising 10 to 60% by weight of a glass fiber (B) having a thickness of 0 μm and 10 to 60% by weight of an inorganic filler (C) excluding glass fiber.
The second invention is a polyamide (A) comprising (a1) 50 to 100% by weight of a semi-aromatic polyamide and (a2) 0 to 50% by weight of an aliphatic polyamide and having a crystallization temperature of 210 ° C. or lower.
30 to 70% by weight, 10 to 60% by weight of glass fiber (B) having an average fiber diameter of 15 to 30 μm, and 10 to 60% by weight of inorganic filler (C) excluding glass fiber. It is a polyamide resin composition.
【０００９】第三の発明は、(a1)アジピン酸およびヘキ
サメチレンジアミンから得られるヘキサメチレンアジパ
ミド単位７０〜９５重量％、およびイソフタル酸および
ヘキサメチレンジアミンから得られるヘキサメチレンイ
ソフタラミド単位５〜３０重量％から構成される半芳香
族ポリアミド５０〜１００重量％および(a2)脂肪族ポリ
アミド０〜１５重量％からなり、結晶化温度が２１０℃
以下であるポリアミド（Ａ）を３０〜７０重量％、平均
繊維径が１５〜３０μｍであるガラス繊維（Ｂ）を１０
〜６０重量％、及びガラス繊維を除く無機充填剤（Ｃ）
を１０〜６０重量％含むことを特徴とするポリアミド樹
脂組成物である。The third invention relates to (a1) 70-95% by weight of hexamethylene adipamide units obtained from adipic acid and hexamethylene diamine, and 5% of hexamethylene isophthalamide units obtained from isophthalic acid and hexamethylene diamine. 50-100% by weight of a semi-aromatic polyamide composed of -30% by weight and 0-15% by weight of (a2) an aliphatic polyamide, and the crystallization temperature is 210 ° C.
The following polyamide (A) is 30 to 70% by weight, and glass fiber (B) having an average fiber diameter of 15 to 30 μm is 10
~ 60% by weight, and inorganic filler excluding glass fiber (C)
Is a polyamide resin composition containing 10 to 60% by weight.
【００１０】第四の発明は、上記本発明の第一又は第
二、あるいは第三の発明に記載のポリアミド樹脂組成物
から得られて中空部を有することを特徴とする射出成形
品である。以下に本発明を詳細に説明する。本発明に用
いられるポリアミド（Ａ）は特に限定されないが、用い
て好ましいポリアミドとして、例えば、ポリアミド６、
ポリアミド６６、ポリアミド６１０、ポリアミド６１
２、ポリアミド１１、ポリアミド１２、ポリアミド４
６、ポリアミドＭＸＤ６、テレフタル酸とヘキサメチレ
ンジアミンを重合してなるポリアミド（以下ポリアミド
６Ｔ）、ヘキサメチレンジアミンとイソフタル酸を重合
してなるポリアミド（以下ポリアミド６Ｉ）などのホモ
ポリマーの単独または、これらのブレンド物等が挙げら
れる。また、上記ポリアミドを成分とした共重合体単独
または、該共重合体同士のブレンド、共重合体とホモポ
リマーのブレンド物等が挙げられる。A fourth aspect of the present invention is an injection-molded article obtained from the polyamide resin composition according to the first, second, or third aspect of the present invention and having a hollow portion. Hereinafter, the present invention will be described in detail. The polyamide (A) used in the present invention is not particularly limited, but preferred polyamides to be used include, for example, polyamide 6,
Polyamide 66, polyamide 610, polyamide 61
2, polyamide 11, polyamide 12, polyamide 4
6, a homopolymer such as polyamide MXD6, a polyamide obtained by polymerizing terephthalic acid and hexamethylenediamine (hereinafter referred to as polyamide 6T), and a polyamide obtained by polymerizing hexamethylenediamine and isophthalic acid (hereinafter referred to as polyamide 6I), or a homopolymer thereof; Blends and the like can be mentioned. In addition, a copolymer containing the above polyamide as a component alone, a blend of the copolymers, a blend of a copolymer and a homopolymer, and the like can be given.
【００１１】本発明におけるより好ましいポリアミド
（Ａ）は、(a1)そのモノマー構造単位に芳香環を含む半
芳香族ポリアミド８５〜１００重量％、および(a2)脂肪
族ポリアミド０〜１５重量％からなるポリアミドであ
る。本発明の(a1)そのモノマー構造単位に芳香環を含む
半芳香族ポリアミドについてさらに詳しく以下に説明す
る。The more preferred polyamide (A) in the present invention comprises (a1) 85 to 100% by weight of a semiaromatic polyamide containing an aromatic ring in its monomer structural unit, and (a2) 0 to 15% by weight of an aliphatic polyamide. It is a polyamide. The semi-aromatic polyamide (a1) of the present invention containing an aromatic ring in its monomer structural unit will be described in more detail below.
【００１２】そのモノマー構造単位に芳香環を含む半芳
香族ポリアミドとしては、結晶性ポリアミド又は非晶性
ポリアミドのいずれも本発明に用いることができる。
特に好ましいのは、結晶化温度が２１０℃以下である半
芳香族ポリアミドであり、このポリアミドは、ガラス繊
維及び無機充填材の配合量が多い場合においても、外観
の良好な成形品を得ることができ、その上熱時剛性の点
でも優れている。As the semi-aromatic polyamide containing an aromatic ring in its monomer structural unit, either a crystalline polyamide or an amorphous polyamide can be used in the present invention.
Particularly preferred is a semi-aromatic polyamide having a crystallization temperature of 210 ° C. or lower, and this polyamide can provide a molded article having a good appearance even when the content of the glass fiber and the inorganic filler is large. It is also excellent in terms of rigidity when heated.
【００１３】本発明における前記ポリアミドの結晶化温
度は、日本工業規格Ｋ７１２１に準じ、ＤＳＣを用い
て、融点＋２０℃の温度で５分間保持した後、２０℃／
分の降温速度で測定した結晶化ピークトップ温度をい
う。結晶性半芳香族ポリアミドの具体的な例としては、
テレフタル酸とヘキサメチレンジアミンとから得られる
ヘキサメチレンテレフタラミド単位（以下６Ｔ成分と記
す）、イソフタル酸およびヘキサメチレンジアミンから
得られるヘキサメチレンイソフタラミド単位（以下６Ｉ
成分と記す）、アジピン酸とメタキシリレンジアミンと
から得られるメタキシリレンアジパミド単位（以下ＭＸ
Ｄ６成分と記す）、から選ばれた少なくとも１つを含む
半芳香族ポリアミド、および前記６Ｔ成分、６Ｉ成分、
およびＭＸＤ６成分から選ばれた少なくとも１つと、ア
ジピン酸およびヘキサメチレンジアミンから得られるヘ
キサメチレンアジパミド単位（以下６６成分と記す）と
の共重合体であり、各単位の単独重合体および／または
共重合体とのブレンド等が挙げられる。また、非晶性半
芳香族ポリアミドの例としては、テレフタル酸とトリメ
チルヘキサメチレンジアミンとから得られるポリアミ
ド、ビス（４−アミノ−メチルヘキシル）メタン、ヘキ
サメチレンジアミン、テレフタル酸、イソフタル酸、カ
プロラクタムから得られるポリアミド、ビス（４−アミ
ノ−３−メチルシクロヘキシル）メタン、ビス（４−ア
ミノ−メチル−５−エチルシクロヘキシル）メタン、ヘ
キサメチレンジアミン、テレフタル酸、イソフタル酸、
カプロラクタムから得られる非晶性ポリアミド等が挙げ
られる。In the present invention, the crystallization temperature of the polyamide is maintained at a temperature of melting point + 20 ° C. for 5 minutes by using DSC according to Japanese Industrial Standard K7121, and then 20 ° C. /
It refers to the crystallization peak top temperature measured at a rate of temperature decrease in minutes. Specific examples of the crystalline semi-aromatic polyamide,
A hexamethylene terephthalamide unit (hereinafter referred to as 6T component) obtained from terephthalic acid and hexamethylene diamine, and a hexamethylene isophthalamide unit (hereinafter referred to as 6I) obtained from isophthalic acid and hexamethylene diamine.
Components), meta-xylylene adipamide units (hereinafter MX) obtained from adipic acid and meta-xylylenediamine
D6 component), a semi-aromatic polyamide containing at least one selected from the group consisting of:
And a copolymer of at least one selected from the MXD6 components and hexamethylene adipamide units (hereinafter referred to as 66 components) obtained from adipic acid and hexamethylenediamine, and a homopolymer of each unit and / or Blends with copolymers and the like can be mentioned. Examples of the amorphous semi-aromatic polyamide include polyamide obtained from terephthalic acid and trimethylhexamethylenediamine, bis (4-amino-methylhexyl) methane, hexamethylenediamine, terephthalic acid, isophthalic acid, and caprolactam. The resulting polyamide, bis (4-amino-3-methylcyclohexyl) methane, bis (4-amino-methyl-5-ethylcyclohexyl) methane, hexamethylenediamine, terephthalic acid, isophthalic acid,
And amorphous polyamides obtained from caprolactam.
【００１４】本発明において特に好ましい半芳香族ポリ
アミド(a1)は、６６成分が７０〜９５重量％、および６
Ｉ成分が５〜３０重量％であるポリアミド６６／６Ｉ共
重合体、及び６６成分が７２〜９３重量％、６Ｉ成分が
７〜２８重量％の範囲である共重合体である。６Ｉ成分
が５重量％より少ないと、優れた成形品外観を有する成
形品が得られず、またガスアシスト射出成形時に均一な
中空部を有する成形品が得られない。６Ｉ成分が３０重
量％より多いと、ガスアシスト射出成形した場合等、金
型内で十分に冷却時間を取らなければ、優れた表面外観
を有する成形品が得らず、また成形品が金型から離型し
難くなり、生産性が悪くなる懸念がある。The semiaromatic polyamide (a1) particularly preferred in the present invention comprises 70 to 95% by weight of 66 components, and 6
A polyamide 66 / 6I copolymer in which the I component is 5 to 30% by weight, and a copolymer in which the 66 component is in a range of 72 to 93% by weight and the 6I component is in a range of 7 to 28% by weight. If the 6I component is less than 5% by weight, a molded article having an excellent appearance of a molded article cannot be obtained, and a molded article having a uniform hollow portion at the time of gas-assisted injection molding cannot be obtained. If the 6I component is more than 30% by weight, a molded article having an excellent surface appearance cannot be obtained unless sufficient cooling time is taken in the mold, such as in the case of gas-assisted injection molding, and the molded article is not molded. From the mold, and there is a concern that the productivity may deteriorate.
【００１５】次に脂肪族ポリアミド(a2)について説明す
る。これらの例としてはポリアミド６、ポリアミド６
６、ポリアミド６１０、ポリアミド６１２、ポリアミド
６６／６共重合体、またはこれらのブレンド物等が挙げ
られる。本発明において好ましいのは、ポリアミド６、
ポリアミド６１０、ポリアミド６１２、ポリアミド６６
／６共重合体、またはこれらのブレンド物であり、結晶
化温度が２１０℃以下である脂肪族ポリアミドがガラス
繊維及び無機充填材の配合量が多い場合においても、外
観の良好な成形品を得ることができるので特に好まし
い。Next, the aliphatic polyamide (a2) will be described. Examples of these are polyamide 6, polyamide 6
6, polyamide 610, polyamide 612, polyamide 66/6 copolymer, or a blend thereof. Preferred in the present invention are polyamide 6,
Polyamide 610, polyamide 612, polyamide 66
/ 6 copolymer or a blend thereof, and the aliphatic polyamide having a crystallization temperature of 210 ° C. or lower can obtain a molded article having a good appearance even when the blending amount of the glass fiber and the inorganic filler is large. It is particularly preferable because it can be used.
【００１６】本発明において使用するポリアミド（Ａ）
中には前記脂肪族ポリアミド(a2)を０〜１５重量％含有
させることができる。１５重量％を超える場合には、機
械的物性が低下し好ましくない。本発明に用いるポリア
ミドの製造は、例えばアジピン酸、イソフタル酸とヘキ
サメチレンジアミンの塩から溶融重合法、固相重合法、
塊状重合法、溶液重合法、またはこれらを組み合わせた
方法等によって差し支えなく、種々の重縮合を利用して
よい。 また、例えば、アジピン酸クロライド、イソフ
タル酸クロライドとヘキサメチレンジアミンから溶液重
合、界面重合等の方法によってもよい。これらの中で、
溶融重合もしくは溶融重合と固相重合の組み合わせによ
る方法が、本発明においては経済上の観点からもより好
ましく用いられる。The polyamide (A) used in the present invention
The aliphatic polyamide (a2) may be contained therein in an amount of 0 to 15% by weight. If it exceeds 15% by weight, the mechanical properties are undesirably reduced. Production of polyamide used in the present invention, for example, adipic acid, a melt polymerization method from a salt of isophthalic acid and hexamethylenediamine, a solid-phase polymerization method,
Various types of polycondensation may be used without any problem, such as a bulk polymerization method, a solution polymerization method, or a method combining these. Further, for example, a method such as solution polymerization or interfacial polymerization from adipic acid chloride, isophthalic acid chloride and hexamethylenediamine may be used. Among these,
In the present invention, a method based on melt polymerization or a combination of melt polymerization and solid phase polymerization is more preferably used from an economic viewpoint.
【００１７】本発明に用いるポリアミドの分子量は、硫
酸溶液粘度ηｒ（ポリマー１ｇに対して９５．５％硫酸
を１００ｍｌ使用し、２５℃で測定する）で１．５〜
３．５であることが好ましく、より好ましくは１．８〜
３．０、更に好ましくは、２．０〜２．８である。ηｒ
が１．５より低いと樹脂組成物が脆くなり、更に、成形
時にシリンダーのノズル先端からのドローリングが激し
くなり成形できなくなる恐れがある。またηｒが３．５
より高いと樹脂の溶融粘度が高くなり過ぎて成形時に金
型のデザインによっては、部分的に無機充填剤の浮き上
がりが見られるようになり、表面光沢性が低下し易くな
る。The polyamide used in the present invention has a molecular weight of 1.5 to 1.5 in terms of sulfuric acid solution viscosity ηr (measured at 25 ° C. using 100 ml of 95.5% sulfuric acid per 1 g of polymer).
It is preferably 3.5, more preferably 1.8 to
3.0, and more preferably 2.0 to 2.8. ηr
If the ratio is less than 1.5, the resin composition becomes brittle, and furthermore, the drawing from the nozzle tip of the cylinder becomes severe during molding, and molding may not be possible. Ηr is 3.5
If it is higher, the melt viscosity of the resin becomes too high, and depending on the design of the mold at the time of molding, floating of the inorganic filler may be partially observed, and the surface glossiness tends to decrease.
【００１８】本発明に使用できる（Ｂ）ガラス繊維は、
平均繊維径が１５〜３０μｍであり、より好ましくは２
０〜２５μｍである。 平均繊維径が１５μｍ未満の場
合には、優れた外観を有し、ガスアシスト射出成形品中
に均一な中空部長さや中空部厚みを有する成形品が得ら
れず、強度や剛性が不足するため金属代替材に適する成
形品を得ることも困難である。また、３０μｍを超える
場合には、所望する充分な補強効果が得られない。The glass fiber (B) that can be used in the present invention is:
The average fiber diameter is 15 to 30 μm, more preferably 2 to 30 μm.
0 to 25 μm. When the average fiber diameter is less than 15 μm, it has an excellent appearance, a molded article having a uniform hollow portion length and hollow portion thickness cannot be obtained in a gas-assisted injection molded product, and the strength and rigidity are insufficient. It is also difficult to obtain molded articles suitable for substitute materials. On the other hand, if it exceeds 30 μm, the desired sufficient reinforcing effect cannot be obtained.
【００１９】通常、ガラス繊維はチョップドストランド
の形で用いられ、その平均長さは０．５ｍｍ以上である
ことが好ましく、より好ましくは１〜２０mm、更に好ま
しくは２〜１０mmである。また、その表面に公知のシラ
ン系カップリング剤を付着させたものを用いても良い。
例えばγ−アミノプロピルトリメトキシシラン、γ−ア
ミノプロピルトリエトキシシラン、Ｎ−β（アミノエチ
ル）−γ−アミノプロピルトリメトキシシラン、ビニル
トリエトキシシラン、γ−グリシドキシプロピルトリメ
トキシシランなどを利用できる。Usually, glass fibers are used in the form of chopped strands, and the average length thereof is preferably 0.5 mm or more, more preferably 1 to 20 mm, and further preferably 2 to 10 mm. Further, a material having a known silane coupling agent adhered to the surface thereof may be used.
For example, γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, N-β (aminoethyl) -γ-aminopropyltrimethoxysilane, vinyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, etc. are used. it can.
【００２０】本発明に用いられる（Ｃ）ガラス繊維を除
く無機充填剤は、炭素繊維、マイカ、タルク、カオリ
ン、ウオラストナイト、炭酸カルシウム、チタン酸カリ
ウム、アパタイト及び膨潤性フッ素雲母のうちから選ば
れる少なくとも１種の無機充填剤であり、中でもカオリ
ン、マイカ、及びウオラストナイトが好ましい。 これ
らの無機充填剤は、その表面に公知のシラン系カップリ
ング剤を付着させたものを用いても良い。例えばγ−ア
ミノプロピルトリメトキシシラン、γ−アミノプロピル
トリエトキシシラン、Ｎ−β（アミノエチル）−γ−ア
ミノプロピルトリメトキシシラン、ビニルトリエトキシ
シラン、γ−グリシドキシプロピルトリメトキシシラン
などを利用できる。The inorganic filler other than the glass fiber (C) used in the present invention is selected from carbon fiber, mica, talc, kaolin, wollastonite, calcium carbonate, potassium titanate, apatite and swellable fluoromica. At least one inorganic filler, among which kaolin, mica and wollastonite are preferred. These inorganic fillers may have a surface to which a known silane coupling agent is adhered. For example, γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, N-β (aminoethyl) -γ-aminopropyltrimethoxysilane, vinyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, etc. are used. it can.
【００２１】本発明における（Ａ）、（Ｂ）及び（Ｃ）
各成分の配合割合は、（Ａ）が３０〜７０重量％、好ま
しくは４０〜６５重量％、（Ｂ）が１０〜６０重量％、
好ましくは１５〜５０重量％、（Ｃ）が１０〜６０重量
％、好ましくは、１０〜４０重量％である。ポリアミド
（Ａ）が３０重量％未満の場合には、成形に際して樹脂
の流動性が悪くなり、薄肉部への樹脂の充填が困難とな
る。更に表面光沢性の良い成形品を得ることが困難であ
る。また７０重量％を超える場合には金属代替可能な構
造材料としての強度及び剛性が不足するため好ましくな
い。（Ｂ）が１０重量％未満の場合には金属代替可能な
構造材料としての強度及び剛性が不足する。また、６０
重量％を超える場合には、ガスアシスト射出成形を実施
しても、均一な中空部分が得られない場合がある。 ま
た（Ｃ）が１０重量％未満の場合には、ガスアシスト射
出成形を実施しても、均一な中空部分が得られない場合
がある。また６０重量％を超える場合には、金属代替可
能な構造材料としての強度及び剛性が不足する。(A), (B) and (C) in the present invention
(A) is 30 to 70% by weight, preferably 40 to 65% by weight, (B) is 10 to 60% by weight,
It is preferably 15 to 50% by weight, (C) is 10 to 60% by weight, preferably 10 to 40% by weight. When the amount of the polyamide (A) is less than 30% by weight, the fluidity of the resin during molding becomes poor, and it becomes difficult to fill the thin portion with the resin. Further, it is difficult to obtain a molded product having good surface gloss. On the other hand, if it exceeds 70% by weight, the strength and rigidity as a structural material that can be replaced by metal are insufficient, which is not preferable. If (B) is less than 10% by weight, the strength and rigidity as a structural material that can be replaced by metal are insufficient. Also, 60
If the amount is more than 1% by weight, a uniform hollow portion may not be obtained even when gas-assisted injection molding is performed. When (C) is less than 10% by weight, a uniform hollow portion may not be obtained even when gas-assisted injection molding is performed. On the other hand, if it exceeds 60% by weight, the strength and rigidity as a structural material that can be replaced with metal are insufficient.
【００２２】本発明のポリアミド樹脂組成物の製造方法
としては、上記の（Ａ）、（Ｂ）、及び（Ｃ）成分およ
び必要に応じて用いられる各種の添加剤を混合し、混練
する方法でよい。より具体的には、（Ａ）、（Ｂ）、
および（Ｃ）を一括して混練する方法、（Ａ）と
（Ｂ）とを溶融混練後、（Ｃ）を混練する方法等が挙げ
られ、また、全部を溶融混練せずに、いわゆるペレット
ブレンドする方法としては、（Ａ）の一部と（Ｂ）と
を溶融混練したペレットと、（Ａ）の残りと（Ｃ）とを
溶融混練したペレットとを、ペレットブレンドして射出
成形に供する方法等を例示できる。The method for producing the polyamide resin composition of the present invention is a method of mixing and kneading the above-mentioned components (A), (B) and (C) and various additives used as required. Good. More specifically, (A), (B),
And (C) are kneaded all at once, (A) and (B) are melt-kneaded, and then (C) is kneaded. As a method of performing the injection molding, a pellet obtained by melt-kneading a part of (A) and (B) and a pellet obtained by melt-kneading the rest of (A) and (C) are pellet-blended and subjected to injection molding. Etc. can be exemplified.
【００２３】その際、配合、混合、混練方法には特に制
限はなく、通常用いられる混合機、例えばヘンシェルミ
キサー、タンブラー、リボンブレンダー等で混合すれば
よい。混練機としては、通常、単軸または２軸の押出機
が用いられる。本発明による成形品は、押出機により、
通常まず、上記本発明の樹脂組成物からなるペレットを
製造し、このペレットをガスアシスト射出成形により任
意の形状に成形して所望の樹脂製品とすることによって
得られる。At this time, the method of blending, mixing, and kneading is not particularly limited, and mixing may be performed using a commonly used mixer, such as a Henschel mixer, a tumbler, or a ribbon blender. As a kneader, a single-screw or twin-screw extruder is usually used. The molded article according to the present invention is produced by an extruder.
Usually, first, a pellet comprising the resin composition of the present invention is produced, and the pellet is formed into an arbitrary shape by gas-assisted injection molding to obtain a desired resin product.
【００２４】本発明におけるガスアシスト射出成形条件
は、例えば特公昭５７−１４９６８号公報記載の公知の
方法によって差し支えない。本発明では、樹脂温度が２
５０℃から３１０℃の範囲、金型温度が４０℃〜１３０
℃の範囲で成形することが好ましい。加圧流体の注入箇
所の位置は特に制限がなく、樹脂注入部に加圧流体注入
部を配置してもよいし、樹脂注入部から離して加圧流体
注入部を配置しても良い。加圧流体としては、常温、常
圧下でガス状であり、成形時に溶融樹脂と反応しないも
のが好ましい。具体的な例としては、窒素ガス、空気、
炭酸ガス、ヘリウム等が挙げられる。The gas-assisted injection molding conditions in the present invention may be, for example, a known method described in Japanese Patent Publication No. 57-14968. In the present invention, the resin temperature is 2
50 ° C to 310 ° C, mold temperature 40 ° C to 130 ° C
It is preferable to mold in the range of ° C. There is no particular limitation on the position of the injection point of the pressurized fluid, and the pressurized fluid injection section may be arranged at the resin injection section, or the pressurized fluid injection section may be arranged separately from the resin injection section. The pressurized fluid is preferably a gas that is gaseous at normal temperature and normal pressure and does not react with the molten resin during molding. Specific examples include nitrogen gas, air,
Carbon dioxide, helium and the like can be mentioned.
【００２５】本発明のポリアミド樹脂組成物には、必要
に応じ本発明の目的を損なわない範囲に於いて通常のポ
リアミド樹脂に添加される酸化防止剤、紫外線吸収剤、
熱安定剤、光劣化防止剤、可塑剤、滑剤、離型剤、核
剤、難燃剤等を添加することもできるし、他の熱可塑性
樹脂をブレンドしても良い。本発明による組成物は、例
えば、アウタードアハンドル、ホイールキャップ、ルー
フレール、ドアミラーベース、ルームミラーアーム、サ
ンルーフデフレクター、ラジエターファン、ベアリング
リテーナー等の自動車部品用成形品、および机および椅
子の脚、座受け、肘掛け等の各種オフィス部品、更に
は、車椅子部品、ドアハンドル、手摺り、浴室等の握り
棒、窓用ノブ、グレーティング材等工業用成形品および
雑貨用成形品に好適に用い得る。これら製品のうち、成
形品内部に中空部を有する射出成形品に特に好ましく用
いられる。The polyamide resin composition of the present invention may contain, if necessary, an antioxidant, an ultraviolet absorber, and the like which are added to a usual polyamide resin within a range not to impair the object of the present invention.
A heat stabilizer, a photo-deterioration inhibitor, a plasticizer, a lubricant, a release agent, a nucleating agent, a flame retardant, and the like may be added, or another thermoplastic resin may be blended. The composition according to the present invention can be used, for example, for moldings for automobile parts such as outer door handles, wheel caps, roof rails, door mirror bases, rearview mirror arms, sunroof deflectors, radiator fans, bearing retainers, and legs and seats of desks and chairs. It can be suitably used for various office parts such as armrests, armchairs, etc., as well as industrial molded articles such as wheelchair parts, door handles, handrails, grip bars in bathrooms, etc., window knobs, grating materials, and miscellaneous goods. Among these products, they are particularly preferably used for injection molded products having a hollow portion inside the molded product.
【００２６】[0026]
【発明の実施の形態】以下、実施例により本発明を更に
詳細に説明するが、本発明はこれら実施例により何等限
定されるものではない。尚、評価方法は下記の通りであ
る。 [ガスアシスト射出成形性]成形機として旭エンジニアリ
ング（株）製中空射出成形用ガス注入設備を設置した住
友重工（株）製ＳＧ２２０を用いた。加圧流体は窒素ガ
スを用い、ノズル注入方式を採用した。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail by way of examples, but the present invention is not limited to these examples. In addition, the evaluation method is as follows. [Gas Assist Injection Moldability] As a molding machine, SG220 manufactured by Sumitomo Heavy Industries, Ltd. equipped with gas injection equipment for hollow injection molding manufactured by Asahi Engineering Co., Ltd. was used. The pressurized fluid used a nitrogen gas and adopted a nozzle injection method.
【００２７】射出成形条件をシリンダー温度を２８０
℃、金型温度を８０℃、射出圧力１４０ｋｇ／ｃｍ２、
ガス圧力２００ｋｇ／ｃｍ2、遅延時間（溶融樹脂の射
出後加圧ガスを注入するまでの時間）１秒、ガス注入時
間３秒、保持時間３０秒とした。評価用成形品の概略を
図１に示した。図１に示す成形品は、骨状のガスチャン
ネルを有する細長平板（長さ500mm、幅200mm、厚さ３m
m）である。The injection molding conditions were set to a cylinder temperature of 280.
° C, mold temperature 80 ° C, injection pressure 140kg / cm2,
The gas pressure was 200 kg / cm 2, the delay time (time from injection of the molten resin to injection of the pressurized gas) was 1 second, the gas injection time was 3 seconds, and the holding time was 30 seconds. The outline of the molded article for evaluation is shown in FIG. The molded product shown in FIG. 1 is an elongated flat plate having a bone-like gas channel (length 500 mm, width 200 mm, thickness 3 m).
m).
【００２８】得られた成形品の中空性に関する評価とし
ては、図１に示す各ガスチャンネルを軸線に沿って鋸で
切断し、切断して得られる各ガスチャンネルの中空部長
さの平均値及びばらつき（本発明では、各測定値の最大
値と最小値の差をばらつきとした）、各中空部の肉厚の
平均値及びばらつき、各中空部内表面粗度のＲａをそれ
ぞれ求めて、評価した。As to the evaluation of the hollowness of the obtained molded article, each gas channel shown in FIG. 1 was cut along a shaft with a saw, and the average value and variation of the length of the hollow portion of each gas channel obtained by cutting were cut. (In the present invention, the difference between the maximum value and the minimum value of each measured value was regarded as a variation), the average value and the variation of the thickness of each hollow portion, and the Ra of the inner surface roughness of each hollow portion were obtained and evaluated.
【００２９】中空部長さは、 各ガスチャンネルの中空
部先端の成形品中心軸線からの到達距離をノギスで測定
した。中空部の肉厚は、各ガスチャンネルの中空部の先
端と成形品中心部との間の中央部分のチャンネル凸部側
の肉厚をマイクロメーターで測定した。また、中空部内
表面粗度は、各ガスチャンネルの中空部の先端と成形品
中心部との間の中央部分のチャンネル平面壁側の中空部
内表面をミツトヨ製Ｓｕｒｆｔｅｓｔ−２０１型の表面
粗度計で測定した。The length of the hollow portion was obtained by measuring the distance from the center axis of the molded product at the tip of the hollow portion of each gas channel with a vernier caliper. The thickness of the hollow portion was determined by measuring the thickness of the central portion between the tip of the hollow portion of each gas channel and the center of the molded product on the side of the channel protrusion using a micrometer. The inner surface roughness of the hollow portion is measured by a surface roughness meter of Mitutoyo's Surftest-201 type, which measures the inner surface of the hollow portion on the channel plane wall side at the center between the tip of the hollow portion of each gas channel and the center of the molded product. It was measured.
【００３０】[機械的物性]東芝機械（株）製ＩＳ−５０
ＥＰ射出成形機を用いて、スクリュー回転数２００ｒｐ
ｍ、樹脂温度２９０℃の成形条件にて、厚さ３ｍｍのＡ
ＳＴＭタイプ１を成形し、この成形片を物性測定用試料
とし、それぞれＡＳＴＭ Ｄ６３８及びＤ７９０に従っ
て引張破断強さ、及び曲げ弾性率を測定した。[Mechanical properties] IS-50 manufactured by Toshiba Machine Co., Ltd.
Screw rotation speed 200rpm using EP injection molding machine
m, 3 mm thick A under molding conditions of resin temperature 290 ° C
An STM type 1 was molded, and the molded piece was used as a sample for measuring physical properties. Tensile breaking strength and flexural modulus were measured according to ASTM D638 and D790, respectively.
【００３１】[表面光沢性]評価用成形板として、東芝機
械（株）社製ＩＳ１５０Ｅ射出成形機を用いて、シリン
ダー温度２９０℃、金型温度１２０℃で、充填時間が約
１．５秒になるように射出圧力、及び射出速度を適宜調
整し、１００×９０×３ｍｍの射出成形板を得た。この
平板について、光沢計（ＨＯＲＩＢＡ製ＩＧ３２０）を
用いてＪＩＳ−Ｋ７１５０に準じて６０度グロスを測定
した。[Surface Gloss] Using an IS150E injection molding machine manufactured by Toshiba Machine Co., Ltd. as a molding plate for evaluation, the filling time was about 1.5 seconds at a cylinder temperature of 290 ° C. and a mold temperature of 120 ° C. The injection pressure and injection speed were appropriately adjusted to obtain an injection molded plate of 100 × 90 × 3 mm. The flat plate was measured for gloss at 60 degrees using a gloss meter (IG320 manufactured by HORIBA) according to JIS-K7150.
【００３２】本発明の実施例に用いた原料を以下に示
す。 （Ａ）ポリアミド ａ１：後記する重合例１で得られたポリアミド６６／６
Ｉ共重合体 結晶化温度 １８６℃ ａ２：ポリアミド６６ 旭化成工業（株）製；商品名
レオナ１３００ 結晶化温度 ２２５℃ ａ３：ポリアミド６ 宇部興産（株）製；商品名 Ｓ
Ｆ１０１３Ａ 結晶化温度 １６２℃ ａ４：ポリアミドＭＸＤ６ 三菱エンジニアリング樹脂
（株）製；商品名 レニー６００２ 結晶化温度
２０５℃ （Ｂ）ガラス繊維 ｂ１：ガラス繊維 旭ファイバーグラス（株）社製 商品名 ＣＳ０３ＪＡ４１６ 平均繊維径 １０μｍ ｂ２：ガラス繊維 旭ファイバーグラス（株）社製 商品名 ＣＳ０３ＦＴ６９２ 平均繊維径 ２３μｍ （Ｃ）他の無機充填剤 ｃ１：ワラストナイト 林化成（株）社製 商品名 ＶＭ−８Ｎ ｃ２：焼成カオリン エンゲルハルト社製 商品名 トランスリンク４４５ [重合例１]アジピン酸とヘキサメチレンジアミンの等モ
ル塩２．００ｋｇと、イソフタル酸とヘキサメチレンジ
アミンの等モル塩０．５０ｋｇ及びアジピン酸０．１０
ｋｇ、及び純水２．５ｋｇを５Ｌのオートクレーブの中
に仕込みよく攪拌した。充分Ｎ2 置換した後、攪拌しな
がら温度を室温から２２０℃まで約１時間かけて昇温し
た。この際、オートクレーブ内の水蒸気による圧力で内
圧は１８ｋｇ／ｃｍ２−Ｇになるが、１８ｋｇ／ｃｍ２
−Ｇ以上の圧力にならないように水を反応系外に除去し
ながらさらに加熱を続けた。さらに２時間後内温が２６
０℃に到達したので加熱を止め、オートクレーブの排出
バルブを閉止し、約８時間かけて室温まで冷却した。冷
却後オートクレーブを開け、約２ｋｇのポリマーを取り
出し粉砕した。得られた粉砕ポリマーを、１０Ｌのエバ
ポレーターに入れＮ２気流下、２００℃で１０時間固相
重合した。固相重合によって得られたポリアミドは、芳
香環成分を８．８モル％含有し、末端カルボキシル基濃
度が１０２．１であり、末端アミノ基濃度は４４．１で
あった。The raw materials used in the examples of the present invention are shown below. (A) Polyamide a1: Polyamide 66/6 obtained in Polymerization Example 1 described below
I copolymer crystallization temperature 186 ° C a2: Polyamide 66 manufactured by Asahi Kasei Corporation;
Leona 1300 Crystallization temperature 225 ° C a3: Polyamide 6 manufactured by Ube Industries, Ltd .; trade name S
F1013A Crystallization temperature 162 ° C a4: Polyamide MXD6 manufactured by Mitsubishi Engineering-Plastics Corporation; trade name Reny 6002 Crystallization temperature
205 ° C (B) glass fiber b1: glass fiber manufactured by Asahi Fiber Glass Co., Ltd. trade name CS03JA416 average fiber diameter 10 μm b2: glass fiber manufactured by Asahi Fiber Glass Co., Ltd. trade name CS03FT692 average fiber diameter 23 μm (C) other Inorganic filler c1: Wollastonite, trade name VM-8N c2, manufactured by Hayashi Kasei Co., Ltd. c2: fired kaolin, trade name, manufactured by Engelhardt Co., Ltd. Translink 445 [Polymerization Example 1] equimolar salt of adipic acid and hexamethylenediamine 2. 00 kg, equimolar salt of isophthalic acid and hexamethylenediamine 0.50 kg and adipic acid 0.10
kg and 2.5 kg of pure water were charged into a 5 L autoclave and stirred well. After sufficiently purging with N2, the temperature was raised from room temperature to 220 DEG C. over about 1 hour with stirring. At this time, the internal pressure becomes 18 kg / cm2-G due to the pressure of the steam in the autoclave.
The heating was further continued while removing water out of the reaction system so that the pressure did not become -G or more. After 2 more hours, the internal temperature is 26
When the temperature reached 0 ° C., the heating was stopped, the discharge valve of the autoclave was closed, and the mixture was cooled to room temperature over about 8 hours. After cooling, the autoclave was opened and about 2 kg of the polymer was taken out and pulverized. The obtained pulverized polymer was put in a 10 L evaporator and subjected to solid-state polymerization at 200 ° C. for 10 hours under a stream of N 2. The polyamide obtained by solid-state polymerization contained 8.8 mol% of an aromatic ring component, had a terminal carboxyl group concentration of 102.1, and a terminal amino group concentration of 44.1.
【００３３】[0033]
【実施例１】ポリアミドとしてａ１を全組成物中５０重
量％になるように、ワラストナイトｃ１を全組成中１５
重量％になるように混合して、東芝機械（株）製ＴＥＭ
３５φ２軸押出機（設定温度２８０℃、スクリュー回転
数３００rpm）にフィードホッパーより供給し、更にサ
イドフィード口よりガラス繊維としてｂ２を全組成物中
３５重量％になるように供給し、紡口より押し出された
溶融混練物をストランド状で冷却し、ペレタイズしてポ
リアミド樹脂組成物ペレットを得た。得られた組成物を
前述のガスアシスト射出成形性評価方法にて評価した。
その組成及び評価結果を表１に示す。Example 1 Wollastonite c1 was used as a polyamide in an amount of 50% by weight in the total composition.
% By weight and mixed with TEM manufactured by Toshiba Machine Co., Ltd.
It is supplied from a feed hopper to a 35φ twin screw extruder (set temperature: 280 ° C., screw rotation speed: 300 rpm). Further, b2 is supplied as glass fiber from a side feed port so as to be 35% by weight of the whole composition, and extruded from a spinneret. The obtained melt-kneaded product was cooled in a strand shape and pelletized to obtain a polyamide resin composition pellet. The obtained composition was evaluated by the gas-assisted injection moldability evaluation method described above.
Table 1 shows the composition and evaluation results.
【００３４】[0034]
【実施例２〜３】ポリアミドの種類をそれぞれ、実施例
２ではａ２に、実施例３ではａ３に変更する以外は実施
例１と同様に実施し、ポリアミド樹脂組成物を得た。得
られた組成物を用いて実施例１と同様に評価した。その
結果を表１に示す。Examples 2-3 A polyamide resin composition was obtained in the same manner as in Example 1 except that the kind of polyamide was changed to a2 in Example 2 and a3 in Example 3. Evaluation was performed in the same manner as in Example 1 using the obtained composition. Table 1 shows the results.
【００３５】[0035]
【比較例１】実施例２において、ガラス繊維の種類をｂ
１に変更する以外は実施例１と同様に実施し、ポリアミ
ド樹脂組成物を得た。得られた組成物を用いて実施例１
と同様に評価した。その結果を表１に示す。Comparative Example 1 In Example 2, the type of glass fiber was changed to b.
Except changing into 1, it carried out similarly to Example 1, and obtained the polyamide resin composition. Example 1 using the obtained composition
Was evaluated in the same way as Table 1 shows the results.
【００３６】[0036]
【比較例２】ポリアミドとしてａ１を全組成物中、５０
重量％になるように東芝機械（株）製ＴＥＭ３５φ２軸
押出機（設定温度２８０℃、スクリュー回転数３００rp
m）にフィードホッパーより供給し、更にサイドフィー
ド口よりガラス繊維としてｂ１を全組成中５０重量％に
なるように供給し、紡口より押し出された溶融混練物を
ストランド状で冷却し、ペレタイズしてポリアミド樹脂
組成物を得た。得られた組成物を用いて実施例１と同様
に評価した。その結果を表１に示す。Comparative Example 2 A1 was used as a polyamide in the total composition.
TEM35φ twin screw extruder manufactured by Toshiba Machine Co., Ltd. (set temperature: 280 ° C., screw rotation speed: 300 rp)
m) from a feed hopper, and further, b1 was supplied as glass fiber from a side feed port so as to be 50% by weight in the total composition, and the melt-kneaded product extruded from a spinneret was cooled in a strand form and pelletized. Thus, a polyamide resin composition was obtained. Evaluation was performed in the same manner as in Example 1 using the obtained composition. Table 1 shows the results.
【００３７】[0037]
【比較例３】予めポリアミドａ２を６０重量％とワラス
トナイトを４０重量％とを実施例１で使用した押出機に
て溶融混練し、ポリアミド樹脂組成物ペレットを得た。
このペレットと比較例２で得られたポリアミド樹脂組成
物ペレットとを重量比で１：４の割合でプラスチック製
の袋内で混合したものを成形機のホッパーに投入し、実
施例１と同様にガスアシスト成形性を評価した。 得ら
れた成形品はガスチャンネル部に中空を形成したもの
の、中空長さは各ガスチャンネルで不均一であり、中空
部の肉厚も同様であった。これは２種類の熱可塑性樹脂
ペレットの混練が不均一なため、得られた成形品中に不
均一に分散し、中空形成が不安定になっていると考えら
れる。Comparative Example 3 Polyamide a2 pellets were obtained by melt kneading 60% by weight of polyamide a2 and 40% by weight of wollastonite in an extruder used in Example 1.
A mixture of the pellets and the polyamide resin composition pellets obtained in Comparative Example 2 in a plastic bag at a weight ratio of 1: 4 was charged into a hopper of a molding machine, and the same as in Example 1. The gas assist moldability was evaluated. Although the obtained molded article had a hollow formed in the gas channel portion, the hollow length was uneven in each gas channel, and the thickness of the hollow portion was also the same. It is considered that this is because the kneading of the two types of thermoplastic resin pellets is uneven, so that the thermoplastic resin pellets are unevenly dispersed in the obtained molded product, and the hollow formation is unstable.
【００３８】[0038]
【実施例４〜８】組成物の組成を表２示すように変更す
る以外は実施例１と同様に実施し、ポリアミド樹脂組成
物を得た。得られた組成物を用いて実施例１と同様に評
価した。その結果を表１に示す。各実施例が示すよう
に、本発明のポリアミド樹脂組成物を用いてガスアシス
ト射出成形を行い、得られる成形品は、比較例にて得ら
れる成形品に比べ各チャンネル部の中空長さが均一で、
且つ充分長いことが判る。 更に中空部肉厚のばらつき
も極めて少なく、中空部内面の平滑性にも優れているこ
とが判る。Examples 4 to 8 The same procedure as in Example 1 was carried out except that the composition of the composition was changed as shown in Table 2, to obtain a polyamide resin composition. Evaluation was performed in the same manner as in Example 1 using the obtained composition. Table 1 shows the results. As shown in each example, gas-assisted injection molding was performed using the polyamide resin composition of the present invention, and the obtained molded product had a uniform hollow length in each channel portion as compared with the molded product obtained in the comparative example. so,
And it turns out that it is long enough. Further, it can be seen that the variation in the thickness of the hollow portion is extremely small, and the smoothness of the inner surface of the hollow portion is excellent.
【００３９】[0039]
【表１】 [Table 1]
【００４０】[0040]
【表２】 [Table 2]
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明における評価用成形品の概略図である。FIG. 1 is a schematic view of a molded article for evaluation in the present invention.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ２９Ｌ 22:00 Ｆターム(参考） 4F206 AA29 AB16 AB25 AG07 AM34 AM35 JA05 JF01 JF02 JN27 4J002 CL031 DA017 DE187 DE237 DH007 DJ007 DJ037 DJ047 DJ057 DL006 FA046 FA047 FB107 FB137 FB147 GN00 GQ01 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification code FI Theme coat ゛ (Reference) B29L 22:00 F term (Reference) 4F206 AA29 AB16 AB25 AG07 AM34 AM35 JA05 JF01 JF02 JN27 4J002 CL031 DA017 DE187 DE237 DH007 DJ007 DJ037 DJ047 DJ057 DL006 FA046 FA047 FB107 FB137 FB147 GN00 GQ01
Claims (4)
樹脂組成物であって、（Ａ）を３０〜７０重量％、
（Ｂ）を１０〜６０重量％、及び（Ｃ）を１０〜６０重
量％含むことを特徴とするポリアミド樹脂組成物。 （Ａ）ポリアミド （Ｂ）平均繊維径が１５〜３０μｍであるガラス繊維 （Ｃ）ガラス繊維を除く無機充填剤1. A polyamide resin composition comprising the following (A) to (C), wherein (A) is 30 to 70% by weight:
A polyamide resin composition comprising 10 to 60% by weight of (B) and 10 to 60% by weight of (C). (A) Polyamide (B) Glass fiber having an average fiber diameter of 15 to 30 μm (C) Inorganic filler excluding glass fiber
ミド５０〜１００重量％と(a2)脂肪族ポリアミド０〜５
０重量％とからなり、結晶化温度が２１０℃以下である
ことを特徴とする請求項１記載のポリアミド樹脂組成
物。2. The polyamide (A) comprises (a1) 50 to 100% by weight of a semi-aromatic polyamide and (a2) an aliphatic polyamide 0 to 5%.
The polyamide resin composition according to claim 1, comprising 0% by weight and having a crystallization temperature of 210 ° C or lower.
およびヘキサメチレンジアミンから得られるヘキサメチ
レンアジパミド単位７０〜９５重量％、およびイソフタ
ル酸およびヘキサメチレンジアミンから得られるヘキサ
メチレンイソフタラミド単位５〜３０重量％から構成さ
れる半芳香族ポリアミドであることを特徴とする請求項
２記載のポリアミド樹脂組成物。3. A semi-aromatic polyamide (a1) comprising 70 to 95% by weight of hexamethylene adipamide units obtained from adipic acid and hexamethylene diamine, and hexamethylene isophthalamide obtained from isophthalic acid and hexamethylene diamine. 3. The polyamide resin composition according to claim 2, which is a semi-aromatic polyamide composed of 5 to 30% by weight of units.
脂組成物から得られて中空部を有することを特徴とする
射出成形品。4. An injection-molded article obtained from the polyamide resin composition according to claim 1, having a hollow portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07937399A JP4236063B2 (en) | 1999-03-24 | 1999-03-24 | Polyamide resin composition and injection molded article |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07937399A JP4236063B2 (en) | 1999-03-24 | 1999-03-24 | Polyamide resin composition and injection molded article |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000273300A true JP2000273300A (en) | 2000-10-03 |
| JP4236063B2 JP4236063B2 (en) | 2009-03-11 |
Family
ID=13688081
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07937399A Expired - Lifetime JP4236063B2 (en) | 1999-03-24 | 1999-03-24 | Polyamide resin composition and injection molded article |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4236063B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002105312A (en) * | 2000-10-04 | 2002-04-10 | Asahi Kasei Corp | Reinforced semiaromatic polyamide resin composition and molded product |
| JP2004176059A (en) * | 2002-11-12 | 2004-06-24 | Asahi Kasei Chemicals Corp | Metallic polyamide resin composition for chair part |
| JP2008019440A (en) * | 2006-07-11 | 2008-01-31 | Ems-Chemie Ag | Polyamide composition for molding and use thereof |
| KR100951519B1 (en) * | 2004-06-16 | 2010-04-07 | 이엠에스-케미 에이지 | Polymer mixture of aliphatic polyamides and partially aromatic polyamides, moulded articles thereof and use thereof |
| JP2010150533A (en) * | 2008-11-25 | 2010-07-08 | Asahi Kasei Chemicals Corp | Polyamide resin composition and molded article thereof |
| JP2010248402A (en) * | 2009-04-17 | 2010-11-04 | Asahi Kasei Chemicals Corp | Polyamide resin composition and molding formed of the same |
| CN102341450A (en) * | 2009-03-04 | 2012-02-01 | 帝斯曼知识产权资产管理有限公司 | Process for preparing injection molded parts with decreased glass fiber read out |
| JP2014113802A (en) * | 2012-12-12 | 2014-06-26 | Toyobo Co Ltd | Polyamide resin composition for water assist injection molding |
-
1999
- 1999-03-24 JP JP07937399A patent/JP4236063B2/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002105312A (en) * | 2000-10-04 | 2002-04-10 | Asahi Kasei Corp | Reinforced semiaromatic polyamide resin composition and molded product |
| JP2004176059A (en) * | 2002-11-12 | 2004-06-24 | Asahi Kasei Chemicals Corp | Metallic polyamide resin composition for chair part |
| JP4480984B2 (en) * | 2002-11-12 | 2010-06-16 | 旭化成ケミカルズ株式会社 | Chair parts made of metallic polyamide resin |
| KR100951519B1 (en) * | 2004-06-16 | 2010-04-07 | 이엠에스-케미 에이지 | Polymer mixture of aliphatic polyamides and partially aromatic polyamides, moulded articles thereof and use thereof |
| JP2008019440A (en) * | 2006-07-11 | 2008-01-31 | Ems-Chemie Ag | Polyamide composition for molding and use thereof |
| JP2010150533A (en) * | 2008-11-25 | 2010-07-08 | Asahi Kasei Chemicals Corp | Polyamide resin composition and molded article thereof |
| CN102341450A (en) * | 2009-03-04 | 2012-02-01 | 帝斯曼知识产权资产管理有限公司 | Process for preparing injection molded parts with decreased glass fiber read out |
| JP2012519096A (en) * | 2009-03-04 | 2012-08-23 | ディーエスエム アイピー アセッツ ビー．ブイ． | Method for producing injection molded articles with reduced glass fiber readout |
| EP2403905B1 (en) | 2009-03-04 | 2016-02-03 | DSM IP Assets B.V. | Process for preparing injection molded parts with decreased glass fiber read out and injection molded part |
| CN106239818A (en) * | 2009-03-04 | 2016-12-21 | 帝斯曼知识产权资产管理有限公司 | For the method preparing the injection molded that the glass fibre with minimizing manifests |
| JP2010248402A (en) * | 2009-04-17 | 2010-11-04 | Asahi Kasei Chemicals Corp | Polyamide resin composition and molding formed of the same |
| JP2014113802A (en) * | 2012-12-12 | 2014-06-26 | Toyobo Co Ltd | Polyamide resin composition for water assist injection molding |
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