JPH0477554A - Glass fiber reinforced polyamide resin composition - Google Patents
Glass fiber reinforced polyamide resin compositionInfo
- Publication number
- JPH0477554A JPH0477554A JP19085590A JP19085590A JPH0477554A JP H0477554 A JPH0477554 A JP H0477554A JP 19085590 A JP19085590 A JP 19085590A JP 19085590 A JP19085590 A JP 19085590A JP H0477554 A JPH0477554 A JP H0477554A
- Authority
- JP
- Japan
- Prior art keywords
- polyamide resin
- glass fiber
- resin composition
- viscosity
- reinforced polyamide
- 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
- 239000003365 glass fiber Substances 0.000 title claims abstract description 43
- 229920006122 polyamide resin Polymers 0.000 title claims abstract description 39
- 239000011342 resin composition Substances 0.000 title abstract description 30
- 229920005989 resin Polymers 0.000 claims abstract description 25
- 239000011347 resin Substances 0.000 claims abstract description 25
- 238000000465 moulding Methods 0.000 claims abstract description 18
- 229920002302 Nylon 6,6 Polymers 0.000 abstract description 9
- 239000000155 melt Substances 0.000 abstract description 7
- 238000002156 mixing Methods 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 abstract description 4
- 229920002292 Nylon 6 Polymers 0.000 abstract description 2
- 239000004952 Polyamide Substances 0.000 description 10
- 229920002647 polyamide Polymers 0.000 description 10
- 239000011521 glass Substances 0.000 description 9
- 238000001746 injection moulding Methods 0.000 description 9
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 239000011159 matrix material Substances 0.000 description 6
- 239000004760 aramid Substances 0.000 description 3
- 229920003235 aromatic polyamide Polymers 0.000 description 3
- 239000011152 fibreglass Substances 0.000 description 3
- 239000008188 pellet Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 229920000393 Nylon 6/6T Polymers 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000012760 heat stabilizer Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000006068 polycondensation reaction Methods 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 239000012763 reinforcing filler Substances 0.000 description 2
- 239000004604 Blowing Agent Substances 0.000 description 1
- KXDHJXZQYSOELW-UHFFFAOYSA-N Carbamic acid Chemical compound NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 150000004985 diamines Chemical class 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 150000003951 lactams Chemical class 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 239000002667 nucleating agent Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000007151 ring opening polymerisation reaction Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、流動性および成形性が良好であって且つ高剛
性および高強度を維持しながらも表面が滑らかな成形品
を与えることができるガラス繊維強化ポリアミド樹脂組
成物に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention can provide a molded product with good fluidity and moldability, and a smooth surface while maintaining high rigidity and high strength. The present invention relates to a glass fiber reinforced polyamide resin composition.
［従来の技術］
従来、高剛性および高強度か要求されるような家具用部
品、例えば椅子の脚、テーブルの脚等、ワイパー ミラ
ー用ステイ等の自動車部品、構造材等の用途に繊維強化
ポリアミド樹脂か使われている。かかる繊維強化ポリア
ミド樹脂においては、ポリアミド樹脂を強化する目的で
、繊維状の強化材例えばガラス繊維をポリアミド樹脂中
に混合することか行なわれている。[Prior Art] Fiber-reinforced polyamide has been used in furniture parts that require high rigidity and strength, such as chair legs and table legs, automobile parts such as wiper mirror stays, and structural materials. Resin is used. In such fiber-reinforced polyamide resins, a fibrous reinforcing material such as glass fiber is mixed into the polyamide resin for the purpose of reinforcing the polyamide resin.
このようなガラス繊維強化ポリアミド樹脂組成物から得
られる成形品の機械的特性例えば剛性および強度を向上
させるためには、ポリアミド樹脂の量に対するガラス繊
維の混合割合を高くする必要がある。しかしながら、従
来のガラス繊維強化ポリアミド樹脂組成物は、ガラス繊
維の割合を高くすると、成形時特に射出成形時の樹脂組
成物の流れが悪くなり大型部品あるいはリブ構造を有す
る部品の成形等が困難になるという問題があった。In order to improve the mechanical properties, such as rigidity and strength, of a molded article obtained from such a glass fiber reinforced polyamide resin composition, it is necessary to increase the mixing ratio of glass fiber to the amount of polyamide resin. However, in conventional glass fiber-reinforced polyamide resin compositions, when the proportion of glass fiber is increased, the flow of the resin composition during molding, especially during injection molding, becomes poor, making it difficult to mold large parts or parts with rib structures. There was a problem.
すなわち、ポリアミド樹脂中に混合するガラス繊維の濃
度を高くすると、樹脂組成物の流れが悪くなり射出成形
時に高射出圧力か必要となるばかりか、薄肉部分か未充
填になりやすく特に大型部品やリブ構造の部品の射出成
形性が著しく損なわれていた。In other words, when the concentration of glass fibers mixed into polyamide resin is increased, the flow of the resin composition becomes poor and high injection pressure is required during injection molding. The injection moldability of the structural parts was significantly impaired.
このほかポリアミド樹脂中へのガラス繊維の混合濃度を
高めた場合には、ガラス繊維か成形品の表面に浮き出て
しまい成形品の表面外観を損ねるという問題もあった。In addition, when the concentration of glass fibers mixed into the polyamide resin is increased, there is also the problem that the glass fibers stand out on the surface of the molded product, impairing the surface appearance of the molded product.
［発明が解決しようとする課題］
そこで本発明の目的は、高剛性および高強度の成形品が
得られ、しかも複雑で細かい部分を有する成形品または
大きな部品をも通常の射出成形装置によって成形するこ
とかでき、且つなめらかな表面外観の成形品を与えるこ
とができる、ガラス繊維強化ポリアミド樹脂組成物を提
供することである。[Problems to be Solved by the Invention] Therefore, an object of the present invention is to obtain a molded product with high rigidity and high strength, and also to mold a molded product with complex and detailed parts or a large part using a normal injection molding machine. It is an object of the present invention to provide a glass fiber-reinforced polyamide resin composition which can be easily molded and which can give a molded article with a smooth surface appearance.
［課題を解決するための手段］
上記の目的は、ポリアミド樹脂３０〜５０重量部とガラ
ス繊維７０〜５０重量部とを包含し、成形時の溶融樹脂
粘度か１０００ ｓｅｃ’−’の剪断速度のもとて４
０〜１５０パスカル秒の範囲であることを特徴とするガ
ラス繊維強化ポリアミド樹脂組成物によって達成された
。[Means for Solving the Problems] The above object includes 30 to 50 parts by weight of polyamide resin and 70 to 50 parts by weight of glass fiber, and the molten resin viscosity at the time of molding has a shear rate of 1000 sec'-'. Mote 4
This was achieved by means of a glass fiber reinforced polyamide resin composition characterized by a temperature range of 0 to 150 Pascal seconds.
本発明において、ガラス繊維強化ポリアミド樹脂組成物
の成形時の溶融樹脂粘度とは、該ガラス繊維強化ポリア
ミド樹脂組成物を成形して得た成形品の溶融粘度であっ
て、絶乾時、２８０℃、剪断速度１０００５ｅｃ−’の
条件で測定したときの粘度をいう。かかる粘度はたとえ
ばＫＡＹＮＥＳＳキャピラリー粘度計を用いて測定する
ことができる。In the present invention, the molten resin viscosity during molding of a glass fiber-reinforced polyamide resin composition refers to the melt viscosity of a molded product obtained by molding the glass fiber-reinforced polyamide resin composition, at 280°C when absolutely dry. , the viscosity when measured under the conditions of a shear rate of 10005 ec-'. Such viscosity can be measured using, for example, a KAYNESS capillary viscometer.
ガラス繊維強化ポリアミド樹脂組成物の成形時の溶融樹
脂粘度か１０００５ｅｃ−’の剪断速度のもとて４０パ
スカル秒以下の場合は、樹脂組成物が低粘度であるため
に成形時にパリが発生したり成形機のノズル部分からの
樹脂組成物の垂れ（いわゆる鼻タレ現象）が発生するな
ど成形性に問題か生じ好ましくない。一方、成形時の溶
融樹脂粘度か１５０パスカル秒以上になると、本発明の
組成物のように５０重量９６以上のガラス繊維が充填さ
れている樹脂組成物においては、ガラス繊維が成形品表
面に浮き出ることによる外観不良等の現象があられれる
ほか、射出成形時に薄肉部分において樹脂組成物が未充
填となりやすいため高い射出圧力が必要となるなどの点
で好ましくない。If the molten resin viscosity at the time of molding the glass fiber reinforced polyamide resin composition or the shear rate of 10,005 ec-' is less than 40 Pascal seconds, the resin composition has a low viscosity and may cause flaking during molding. This is undesirable because it causes problems in moldability, such as dripping of the resin composition from the nozzle of the molding machine (so-called nose dripping phenomenon). On the other hand, when the viscosity of the molten resin during molding reaches 150 Pascal seconds or more, the glass fibers stand out on the surface of the molded product in a resin composition filled with glass fibers weighing 50 and 96 or more, such as the composition of the present invention. This is undesirable in that, in addition to causing phenomena such as poor appearance due to this, a high injection pressure is required because the resin composition tends to be unfilled in thin-walled portions during injection molding.
本発明のガラス繊維強化ポリアミド樹脂組成物の成形法
としては、特に射出成形が好ましい。本発明の樹脂組成
物は、特に、射出成形時の温度（通常融点より１５℃な
いし４０℃高い温度）における溶融樹脂の粘度が１００
０５ｅｃ−’の剪断速度のもとて４０〜１５０パスカル
秒以下になるように調製することが好ましい。Injection molding is particularly preferred as a molding method for the glass fiber reinforced polyamide resin composition of the present invention. In particular, the resin composition of the present invention has a viscosity of molten resin of 100° C. at the temperature during injection molding (usually 15° C. to 40° C. higher than the melting point).
It is preferable to adjust the shear rate to 40 to 150 Pascal seconds or less based on the shear rate of 0.05 ec-'.
本発明のガラス繊維強化ポリアミド樹脂組成物は、マト
リックスであるポリアミド樹脂に通常の強化フィラーで
あるガラス繊維を（ポリアミド樹脂とガラス繊維との合
計重量を１００重量部として）最大７０重量部まで充填
したものである。In the glass fiber reinforced polyamide resin composition of the present invention, a polyamide resin as a matrix is filled with glass fiber as a normal reinforcing filler up to a maximum of 70 parts by weight (assuming the total weight of the polyamide resin and glass fibers is 100 parts by weight). It is something.
本発明においてマトリックスとして使用されるポリアミ
ド樹脂は低粘度のものであることが好ましい。具体的に
は、絶乾時、射出成形樹脂温度（通常融点より１５℃な
いし４０℃高い温度）で１０００５ｅｃ−’における溶
融粘度が８０パスカル秒以下であるような低粘度のもの
が好ましい。このような低粘度のポリアミド樹脂は、重
合時の分子量調節たとえば重合時の水分コントロールに
より低分子量のポリアミドとすることによって、あるい
は高分子量ポリアミドと低分子量ポリアミドとを混合す
ることによって得ることかできる。この場合の混合はペ
レット形状における混合でも混線時の溶融状態における
混合であってもよい。The polyamide resin used as the matrix in the present invention is preferably of low viscosity. Specifically, a low viscosity material having a melt viscosity of 80 Pascal seconds or less at 10005 ec-' at an injection molding resin temperature (normally 15° C. to 40° C. higher than the melting point) when completely dry is preferable. Such a low-viscosity polyamide resin can be obtained by adjusting the molecular weight during polymerization, for example, controlling the moisture content during polymerization, to obtain a low-molecular-weight polyamide, or by mixing a high-molecular-weight polyamide and a low-molecular-weight polyamide. The mixing in this case may be in the form of pellets or in the molten state at the time of crosstalk.
本発明でいうポリアミドとは、主鎖にアミド結合を有す
る重合体で、ジアミンと二塩基酸との重縮合、ラクタム
の開環重合、アミノカルボン酸の重縮合によって得られ
る線状合成高分子であり、例えば、ナイロン６、ナイロ
ン６６、ナイロン６８．６１０．６１２等またはそれら
の共重合すイロンか挙げられ、芳香族ポリアミドをも含
むものである。The polyamide used in the present invention is a polymer having an amide bond in the main chain, and is a linear synthetic polymer obtained by polycondensation of diamine and dibasic acid, ring-opening polymerization of lactam, and polycondensation of aminocarboxylic acid. Examples include nylon 6, nylon 66, nylon 68.610.612, and copolymerized ylons thereof, and also include aromatic polyamides.
本発明のポリアミド樹脂組成物中のガラス繊維の量は、
ポリアミド樹脂とガラス繊維との合計重量を１００重量
部として５０〜７０重量部とする。The amount of glass fiber in the polyamide resin composition of the present invention is
The total weight of the polyamide resin and glass fiber is 100 parts by weight, and the amount is 50 to 70 parts by weight.
ガラス繊維の配合量か７０重量部以上となると樹脂組成
物の流動性および加工性（成形性）か低下すると同時に
、均一な混合分散状態が得難くなり、また成形品の表面
状態が悪くなるので好ましくない。If the amount of glass fiber blended exceeds 70 parts by weight, the fluidity and processability (moldability) of the resin composition will decrease, and at the same time, it will be difficult to obtain a uniform mixed and dispersed state, and the surface condition of the molded product will deteriorate. Undesirable.
本発明においてガラス繊維としては、通常強化フィラー
として使用されるガラス繊維を用いることかできる。す
なわち、長繊維、短繊維ガラスの任意の形状のものが使
用できる。これらのガラス繊維長は、押出機でコンパウ
ンドする場合、スクリューのブザ１′ンを考慮するかま
たはダウンストリーム方式等を採用することによって最
適な繊維長にコントロールすることができる。好ましく
はチョツプドストランドタイプの短繊維のガラスを使用
する。In the present invention, glass fibers that are commonly used as reinforcing fillers can be used as the glass fibers. That is, long fiber glass or short fiber glass of any shape can be used. When compounding with an extruder, the length of these glass fibers can be controlled to an optimum fiber length by taking into consideration the buzzer of the screw or by adopting a downstream method. Preferably, chopped strand type short fiber glass is used.
本発明のガラス繊維強化ポリアミド樹脂組成物は、上記
のポリアミド樹脂およびガラス繊維の他に１またはそれ
以上の通常の添加物、例えば、酸化、熱および紫外線劣
化に対する安定剤および楚止剤、潤滑剤および離型剤、
染料および顔料を含む着色剤、核形成剤、発泡剤、可塑
剤、無機充填剤、難燃剤および帯電防止剤などを目的に
応じて適宜添加することかできる。The glass fiber-reinforced polyamide resin composition of the present invention may contain, in addition to the polyamide resin and glass fibers described above, one or more conventional additives, such as stabilizers against oxidative, thermal and ultraviolet degradation, and anti-dampling agents, lubricants. and mold release agent,
Coloring agents including dyes and pigments, nucleating agents, blowing agents, plasticizers, inorganic fillers, flame retardants, antistatic agents, and the like may be added as appropriate depending on the purpose.
本発明のガラス繊維強化ポリアミド樹脂組成物は、ポリ
アミド樹脂の溶融粘度か低いためポリアミド樹脂に混合
されたガラスｗｔＮの表面を濡らすことにより加工性お
よび成形性が改善され、従来のように充填されたガラス
繊維が成形品の表面に浮き出ることもない。Since the glass fiber reinforced polyamide resin composition of the present invention has a low melt viscosity, the processability and moldability of the glass fiber reinforced polyamide resin composition of the present invention are improved by wetting the surface of the glass wtN mixed with the polyamide resin, and the glass fiber reinforced polyamide resin composition can be filled in the same manner as conventional methods. Glass fibers do not stand out on the surface of the molded product.
［実施例］ 以下に本発明を実施例により具体的に説明する。[Example] The present invention will be specifically explained below using examples.
ナイロン６６あるいはナイロン６６／６共重合体（重量
比８５／１５）からなるマトリックスに、市販のガラス
短繊維（直径１０ミクロン、長さ３ｍｍチョツプドスト
ランドタイプ）をプリブレンドして添加し、２Ｐ−スタ
ーリング−軸押出機を用いて混合して、ガラス繊維強化
ポリアミド樹脂組成物の試料１〜１８を作成した。サイ
ドフィーダーと、適切にデザインされたスクリュウを有
する二軸押出機を用いても同様の試料を得ることができ
る。比較的小さい押出機のバレル温度は供給端て約１０
０℃から押出機前端での約２６０〜２７０℃に上昇し、
溶融樹脂温度が２９０〜３１０℃になるように設定され
る。試料１ｏには熱安定剤か添加されている。Commercially available short glass fibers (chopped strand type with a diameter of 10 microns and a length of 3 mm) were preblended and added to a matrix consisting of nylon 66 or nylon 66/6 copolymer (weight ratio 85/15) to produce 2P. - Samples 1 to 18 of glass fiber reinforced polyamide resin compositions were prepared by mixing using a Stirling-screw extruder. Similar samples can be obtained using a twin screw extruder with a side feeder and a suitably designed screw. The barrel temperature of the relatively small extruder is approximately 10°C at the feed end.
rising from 0°C to about 260-270°C at the front end of the extruder,
The temperature of the molten resin is set at 290 to 310°C. A heat stabilizer was added to sample 1o.
そして、これらの試料を射出成形して成形品を製造した
。用いる試料はあらかじめ成形に先立って８０℃で一晩
真空乾燥する。試験片（３，２ｍｍ厚みを有し、ＡＳＴ
ＭＤ６３８にもとづいた引張り試験片、１３ｍｍ×１３
０ｍｍＸ３．２ｍｍ曲げ試験片）は６ｏｚ、の射出成形
機で成形する。保持時間は通常５〜６分であり、バレル
温度は２７０〜２８０℃とし、ノズル温度は２８０〜２
９０℃とする。型温度は約９０”Ｃとし、速い成形サイ
クル１０／２０又は２０／２０の成形サイクル（ラム前
進の秒／保持の秒）で実施する。These samples were then injection molded to produce molded products. The sample to be used is vacuum-dried overnight at 80° C. prior to molding. Test piece (3.2 mm thick, AST
Tensile test piece based on MD638, 13mm x 13
A 0 mm x 3.2 mm bending test piece) is molded using a 6 oz injection molding machine. The holding time is usually 5-6 minutes, the barrel temperature is 270-280℃, and the nozzle temperature is 280-280℃.
The temperature shall be 90°C. The mold temperature is approximately 90"C and a fast molding cycle of 10/20 or 20/20 (seconds of ram advance/seconds of hold) is carried out.
こうして得た試料および成形品について、溶融樹脂粘度
、各種の物性値および表面性を測定した。The molten resin viscosity, various physical property values, and surface properties of the samples and molded articles thus obtained were measured.
樹脂粘度は、ＫＡＹＮＥＳＳキャピラリー粘度計を用い
て、成形品の絶乾時（０，１〜０，１５％の水分を含む
） ２８０℃、剪断速度１０００ｓｅｃ −’における
溶融粘度を測定した。The resin viscosity was determined by measuring the melt viscosity of the molded article when it was completely dry (containing 0.1 to 0.15% water) at 280° C. and a shear rate of 1000 sec −' using a KAYNESS capillary viscometer.
ここで試料１〜１８の作成に使用したナイロン６６ある
いはナイロン６６／６共重合体は、異なる分子量を有す
るため異なる粘度を有する。例えば、試料１．４，７．
および１２においては、１２０〜１５０パスカル秒の溶
融粘度を有するナイロン６６あるいはナイロン６６／６
コポリマーをポリマーマトリックスとして用いた。これ
ら粘度の異なるポリアミド樹脂を使用し、かつ、混線条
件を調節することによって、ガラス繊維強化ポリアミド
樹脂組成物試料の成形時の溶融樹脂粘度を調節した。The nylon 66 or nylon 66/6 copolymers used to create Samples 1 to 18 have different viscosities because they have different molecular weights. For example, samples 1.4, 7.
and 12, nylon 66 or nylon 66/6 having a melt viscosity of 120 to 150 pascal seconds.
A copolymer was used as the polymer matrix. The viscosity of the molten resin during molding of the glass fiber-reinforced polyamide resin composition sample was adjusted by using these polyamide resins with different viscosities and adjusting the cross-wire conditions.
第１表に、試料１〜１８に使用したポリアミドの種類、
ガラス繊維の重量％（ポリアミドとガラス繊維の合計重
量を基準とした重量％）、その成形性および溶融樹脂粘
度、およびこれら試料から得られた射出成形品の各種物
性値や表面性を示す。Table 1 shows the types of polyamides used in samples 1 to 18,
The weight percent of glass fiber (weight percent based on the total weight of polyamide and glass fiber), its moldability and molten resin viscosity, and various physical property values and surface properties of injection molded products obtained from these samples are shown.
ここで試料の成形性は、射出成形時の金型内での樹脂の
流動性の程度を良好なものから順に、容易、普通、およ
び困難の３段階で評価した。試料１１は成形上の許容限
界なものであり、限界（ＭＡＲＧ ＩＮＡＬ）と表わし
た。成形品の表面性は、表面付近に浮き出たガラス繊維
に起因する表面の滑らかさの程度を肉眼で観察し、荒い
および細かいの２段階で評価した。成形品の強度および
剛性等の機械的特性については、ＡＳＴＭ Ｄ６３８
、Ｄ７９０、Ｄ２５６等にもとづき、アイゾツト値、引
っ張り強度、伸び率（ＥＬＯＮＧＡＴＩＯＮ） 、およ
び曲げ弾性率により評価することができる。The moldability of the samples was evaluated by evaluating the degree of fluidity of the resin within the mold during injection molding in three stages: easy, normal, and difficult, in descending order of the degree of fluidity of the resin within the mold. Sample 11 was at the allowable limit for molding and was expressed as limit (MARG INAL). The surface quality of the molded product was evaluated by visually observing the degree of surface smoothness caused by glass fibers protruding near the surface, and grading it into two grades: rough and fine. For mechanical properties such as strength and rigidity of molded products, ASTM D638
, D790, D256, etc., and can be evaluated by Izot value, tensile strength, elongation, and flexural modulus.
試料１〜６はガラス繊維を５０重量％添加した試料であ
る。第１表から明らかなように、成形時の溶融樹脂粘度
が４０〜１５０パスカル秒の範囲にある本発明の試料は
いずれも成形性が良く、成形品の表面性も良好であった
。Samples 1 to 6 are samples to which 50% by weight of glass fiber was added. As is clear from Table 1, all the samples of the present invention in which the molten resin viscosity during molding was in the range of 40 to 150 Pascal seconds had good moldability and the surface properties of the molded products were also good.
試料７〜１４は、ガラス繊維を６０重量９０添加したも
のである。第１表にみられるように、溶融樹脂粘度か１
５０パスカル秒以上である比較例の試料７および１２に
比べ、溶融樹脂粘度か４０〜１５０パスカル秒の範囲に
ある本発明の試料は、熱安定剤を添加した試料１０も含
めて、その成形品の良好な機械的特性を維持しつつ成形
性および表面性に優れていた。比較例の試料１１は、溶
融樹脂粘度か３４パスカル秒と低いため、良好な成形品
表面外観を与えたものの、成形時にはいわゆる鼻タレ現
象がみられた。なお試料７〜１１については、ペレット
の溶融粘度と成形用金型内の溶融樹脂の粘度との相異を
示すため、試料から作成したベレットついて測定した溶
融樹脂粘度も付記した。Samples 7 to 14 have glass fibers added at 60% by weight and 90% by weight. As shown in Table 1, the viscosity of the molten resin is 1
Compared to Comparative Samples 7 and 12, which have a viscosity of 50 Pascal seconds or more, the samples of the present invention whose molten resin viscosity is in the range of 40 to 150 Pascal seconds, including Sample 10 to which a heat stabilizer was added, have a high It had excellent moldability and surface properties while maintaining good mechanical properties. Sample 11 of the comparative example had a low molten resin viscosity of 34 Pascal seconds, so although it gave a good surface appearance of the molded product, a so-called nose sagging phenomenon was observed during molding. Regarding Samples 7 to 11, in order to show the difference between the melt viscosity of the pellets and the viscosity of the molten resin in the mold, the viscosity of the molten resin measured for pellets made from the samples is also added.
試料１５〜１８は、ガラス繊維を６５重量％添加したガ
ラス強化ポリアミド樹脂組成物である。Samples 15 to 18 are glass-reinforced polyamide resin compositions containing 65% by weight of glass fiber.
試料１５〜１８はいずれも溶融樹脂粘度か本発明の範囲
にあり、これらの試料は成形時の流動性が良好であって
且つ機械的物性に優れ表面の滑らかな成形品を与えた。Samples 15 to 18 all had molten resin viscosities within the range of the present invention, and these samples had good fluidity during molding and gave molded products with excellent mechanical properties and smooth surfaces.
試料１７は、ガラス繊維を６５重量％含む通常のナイロ
ン６６をポリマーマトリックスとしたもので、射出成形
が容易ではなく、機械的特性を記していない。Sample 17 has a polymer matrix of regular nylon 66 containing 65% glass fibers, is not easy to injection mold, and has no mechanical properties listed.
次に、芳香族ポリアミドをマトリックスとして用い上記
と同様の方法でガラス繊維を配合してガラス繊維強化ポ
リアミド樹脂組成物試料を調製し、これを射出成形して
成形品を製造した。この場合芳香族ポリアミドの分子量
を調節することにより樹脂組成物の溶融樹脂粘度を調節
した。その結果、本発明の溶融樹脂粘度の範囲の組成物
は、成形性が良好であるばかりでなく、低分子量のポリ
アミドを使用しても高分子量のポリアミドを使用したも
のとほぼ同等の機械的な特性を有し且つ表面が滑らかな
成形品を与えた。Next, a glass fiber-reinforced polyamide resin composition sample was prepared by blending glass fibers in the same manner as above using aromatic polyamide as a matrix, and this was injection molded to produce a molded article. In this case, the molten resin viscosity of the resin composition was adjusted by adjusting the molecular weight of the aromatic polyamide. As a result, the composition of the present invention having a melt resin viscosity in the range not only has good moldability, but also has mechanical properties that are almost the same even when using low molecular weight polyamide as when using high molecular weight polyamide. A molded product with characteristics and a smooth surface was obtained.
〔発明の効果コ
以上のように本発明のガラス繊維強化ポリアミド組成物
は、成形性か良好であってしかも剛性等の機械的特性お
よび表面性に優れた成形品を与えることかできる。[Effects of the Invention] As described above, the glass fiber-reinforced polyamide composition of the present invention can provide molded articles with good moldability and excellent mechanical properties such as rigidity and surface properties.
Claims (1)
０重量部とを包含し、 成形時の溶融樹脂粘度が１０００ｓｅｃ＾−＾１の剪断
速度のもとで４０〜１５０パスカル秒の範囲であること
を特徴とするガラス繊維強化ポリアミド樹脂組成物。[Claims] 30 to 50 parts by weight of polyamide resin and 70 to 5 parts by weight of glass fiber
0 parts by weight, and the molten resin viscosity during molding is in the range of 40 to 150 Pascal seconds at a shear rate of 1000 seconds^-^1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19085590A JP3588106B2 (en) | 1990-07-20 | 1990-07-20 | Glass fiber reinforced polyamide resin composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19085590A JP3588106B2 (en) | 1990-07-20 | 1990-07-20 | Glass fiber reinforced polyamide resin composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0477554A true JPH0477554A (en) | 1992-03-11 |
| JP3588106B2 JP3588106B2 (en) | 2004-11-10 |
Family
ID=16264897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19085590A Expired - Lifetime JP3588106B2 (en) | 1990-07-20 | 1990-07-20 | Glass fiber reinforced polyamide resin composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3588106B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5714250A (en) * | 1994-12-28 | 1998-02-03 | Fuji Photo Film Co., Ltd. | Direct drawing type lithographic printing plate precursor |
| JPH11349696A (en) * | 1998-06-03 | 1999-12-21 | Unitika Ltd | Molded body from nylon resin composition |
| JP2002316762A (en) * | 2001-04-20 | 2002-10-31 | Canon Inc | Sheet loading aligning device and image forming device |
| WO2007097184A1 (en) * | 2006-02-27 | 2007-08-30 | Asahi Kasei Chemicals Corporation | Glass-fiber-reinforced thermoplastic resin composition and molded article |
| US7380786B2 (en) | 2000-11-30 | 2008-06-03 | Ricoh Company, Ltd. | Sheet-like medium alignment apparatus |
| US7475874B2 (en) | 2003-03-17 | 2009-01-13 | Fuji Xerox Co., Ltd | Sheet processing apparatus and sheet bundle alignment method |
| US11299603B2 (en) | 2016-10-19 | 2022-04-12 | Asahi Kasei Kabushiki Kaisha | Polyamide resin composition |
-
1990
- 1990-07-20 JP JP19085590A patent/JP3588106B2/en not_active Expired - Lifetime
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5714250A (en) * | 1994-12-28 | 1998-02-03 | Fuji Photo Film Co., Ltd. | Direct drawing type lithographic printing plate precursor |
| JPH11349696A (en) * | 1998-06-03 | 1999-12-21 | Unitika Ltd | Molded body from nylon resin composition |
| US7380786B2 (en) | 2000-11-30 | 2008-06-03 | Ricoh Company, Ltd. | Sheet-like medium alignment apparatus |
| US7441771B2 (en) | 2000-11-30 | 2008-10-28 | Ricoh Company, Ltd. | Sheet-like medium alignment apparatus |
| US7451980B2 (en) | 2000-11-30 | 2008-11-18 | Ricoh Company, Ltd. | Sheet-like medium alignment apparatus |
| JP2002316762A (en) * | 2001-04-20 | 2002-10-31 | Canon Inc | Sheet loading aligning device and image forming device |
| US7644919B2 (en) | 2003-03-17 | 2010-01-12 | Fuji Xerox Co., Ltd. | Sheet processing apparatus and sheet bundle alignment method |
| US7475874B2 (en) | 2003-03-17 | 2009-01-13 | Fuji Xerox Co., Ltd | Sheet processing apparatus and sheet bundle alignment method |
| US7726639B2 (en) | 2003-03-17 | 2010-06-01 | Fuji Xerox Co., Ltd. | Sheet processing apparatus and sheet bundle alignment method |
| WO2007097184A1 (en) * | 2006-02-27 | 2007-08-30 | Asahi Kasei Chemicals Corporation | Glass-fiber-reinforced thermoplastic resin composition and molded article |
| JP2009221479A (en) * | 2006-02-27 | 2009-10-01 | Asahi Kasei Chemicals Corp | Glass fiber-reinforced thermoplastic resin composition |
| JPWO2007097184A1 (en) * | 2006-02-27 | 2009-07-09 | 旭化成ケミカルズ株式会社 | Glass fiber reinforced thermoplastic resin composition and molded article |
| JP2010132914A (en) * | 2006-02-27 | 2010-06-17 | Asahi Kasei Chemicals Corp | Glass fiber-reinforced thermoplastic resin composition and molded article thereof |
| US8993670B2 (en) | 2006-02-27 | 2015-03-31 | Asahi Kasei Chemicals Corporation | Glass-fiber reinforced thermoplastic resin composition and molded article thereof |
| US11299603B2 (en) | 2016-10-19 | 2022-04-12 | Asahi Kasei Kabushiki Kaisha | Polyamide resin composition |
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| Publication number | Publication date |
|---|---|
| JP3588106B2 (en) | 2004-11-10 |
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