JPH11245927A - Hollow molded article - Google Patents
Hollow molded articleInfo
- Publication number
- JPH11245927A JPH11245927A JP7351898A JP7351898A JPH11245927A JP H11245927 A JPH11245927 A JP H11245927A JP 7351898 A JP7351898 A JP 7351898A JP 7351898 A JP7351898 A JP 7351898A JP H11245927 A JPH11245927 A JP H11245927A
- Authority
- JP
- Japan
- Prior art keywords
- nylon
- polyamide resin
- molded article
- hollow molded
- blow molding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004677 Nylon Substances 0.000 claims abstract description 33
- 229920001778 nylon Polymers 0.000 claims abstract description 33
- 229920000098 polyolefin Polymers 0.000 claims abstract description 22
- 229920006122 polyamide resin Polymers 0.000 claims abstract description 19
- 238000010102 injection blow moulding Methods 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 239000011342 resin composition Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 abstract description 8
- 238000002156 mixing Methods 0.000 abstract description 7
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 abstract description 6
- 238000000465 moulding Methods 0.000 abstract description 6
- 150000003839 salts Chemical class 0.000 abstract description 5
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 abstract description 4
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 abstract description 4
- 235000011037 adipic acid Nutrition 0.000 abstract description 2
- 239000001361 adipic acid Substances 0.000 abstract description 2
- 150000008064 anhydrides Chemical class 0.000 abstract description 2
- 238000010559 graft polymerization reaction Methods 0.000 abstract description 2
- 150000007934 α,β-unsaturated carboxylic acids Chemical class 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract 3
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 abstract 1
- 229920002647 polyamide Polymers 0.000 description 8
- 239000011347 resin Substances 0.000 description 8
- 229920005989 resin Polymers 0.000 description 8
- 239000004952 Polyamide Substances 0.000 description 7
- 230000004888 barrier function Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 229920001577 copolymer Polymers 0.000 description 6
- 238000001746 injection moulding Methods 0.000 description 5
- 239000008188 pellet Substances 0.000 description 4
- 238000000071 blow moulding Methods 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229920002292 Nylon 6 Polymers 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000007334 copolymerization reaction Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 229920000571 Nylon 11 Polymers 0.000 description 1
- 229920000299 Nylon 12 Polymers 0.000 description 1
- 229920003189 Nylon 4,6 Polymers 0.000 description 1
- 229920000305 Nylon 6,10 Polymers 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 229920000572 Nylon 6/12 Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000002989 correction material Substances 0.000 description 1
- 239000003484 crystal nucleating agent Substances 0.000 description 1
- 150000004985 diamines Chemical class 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229920000554 ionomer Polymers 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000012643 polycondensation polymerization Methods 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
Landscapes
- Containers Having Bodies Formed In One Piece (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、中空成形品に関す
るものであり、詳しくは、特定のポリアミド樹脂組成物
からインジェクションブロー成形法により得られるガス
バリア性、耐薬品性、柔軟性に優れた中空成形品に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow molded article, and more particularly, to a hollow molded article obtained from a specific polyamide resin composition by an injection blow molding method and having excellent gas barrier properties, chemical resistance and flexibility. It is about goods.
【０００２】[0002]
【従来の技術】ポリアミド樹脂は、その優れた特性によ
り射出成形、押出成形、ブロー成形など広く応用され、
その成形品は様々な用途に使用されている。その中で、
ブロー成形法により得られた中空成形品は、機械強度、
ガスバリア性、耐薬品性、耐熱性などに優れているた
め、自動車用途のタンク、パイプ類、食品容器、修正液
容器等の文具類の本体部分などに応用されている。2. Description of the Related Art Polyamide resins are widely used in injection molding, extrusion molding, blow molding, etc. due to their excellent properties.
The molded articles are used for various applications. inside that,
The hollow molded product obtained by the blow molding method has mechanical strength,
Because of its excellent gas barrier properties, chemical resistance, heat resistance, etc., it has been applied to the main parts of stationery such as tanks for automobiles, pipes, food containers, correction fluid containers, and the like.
【０００３】ブロー成形用途には、ポリアミド樹脂の中
でも成形性や物性あるいは価格などにバランスがとれた
６ナイロン樹脂が一般的に使用されている。しかし、６
ナイロン樹脂製中空成形品は、優れた特性を持つ反面、
柔軟性にかけるという欠点を有している。即ち、柔軟性
が要求される用途、例えば文具類などの容器で、指など
で加圧する事により内容物を押し出して使用する様な用
途には硬すぎて適さない。６ナイロン成形品の曲げ弾性
率は２．０ＧＰａ以上であるが、経験的に、成形品の曲
げ弾性率が１．８ＧＰａを越える樹脂はこの様な用途に
は硬すぎて適さない。[0003] Among the polyamide resins, 6 nylon resins which are well-balanced in moldability, physical properties, price and the like are generally used for blow molding. However, 6
Nylon resin hollow molded products have excellent characteristics,
It has the drawback of flexibility. That is, it is too hard to be used in applications requiring flexibility, for example, in a container for stationery or the like, in which the contents are extruded and used by pressing with a finger or the like. The flexural modulus of nylon 6 molded product is 2.0 GPa or more, but empirically, a resin whose flexural modulus of molded product exceeds 1.8 GPa is too hard and unsuitable for such use.
【０００４】前述の点から、柔軟性が要求される用途に
は、６ナイロンの代わりにタフナイロンと呼ばれる、６
ナイロンあるいは６６ナイロンに変性ポリオレフィンを
配合して柔軟化したナイロン樹脂が使用されている。[0004] In view of the above, in applications where flexibility is required, 6 tough nylon instead of 6 nylon is used.
Nylon or 66 nylon is used, and a modified polyolefin is blended with a softened nylon resin.
【０００５】しかしながら、このタフナイロンは、最初
に射出成形により成形品の雛型であるプリフォームを成
形し、それに空気を吹き込む事により中空成形品を得る
インジェクションブロー成形法に用いた場合、成形が困
難である。これは、従来のタフナイロン樹脂の様に結晶
化速度が速い樹脂では、プリフォームを成形した時点で
樹脂の結晶化が進行するため、次のブロー段階でプリフ
ォームを膨らます事が困難だからである。[0005] However, when this tough nylon is used in an injection blow molding method in which a preform, which is a model of a molded product, is first molded by injection molding, and air is blown into the preform to obtain a hollow molded product. Have difficulty. This is because, in the case of a resin having a high crystallization rate such as a conventional tough nylon resin, the crystallization of the resin proceeds when the preform is molded, so that it is difficult to inflate the preform in the next blow step. .
【０００６】上記問題を解決する方法として、従来のタ
フナイロン（６ナイロン＋ポリオレフィン）に６−６６
共重合ナイロンを配合した樹脂組成物をインジェクショ
ンブロー成形する事により中空成形品を得る方法が提案
されている（特開平０８−１６４６９４号公報）が、こ
の方法では、賦形性の向上が不十分であり、安定成形性
に問題がある。なぜなら、プリフォームの結晶化度を低
下させるには６−６６共重合ナイロンの量を増加させる
事が有効であるが、６−６６共重合ナイロンの量を増加
させると相対的にタフナイロンの量が減少してしまうた
め、必要な柔軟性が失われるからである。As a method for solving the above problem, a conventional tough nylon (6-nylon + polyolefin) is replaced with 6-66.
A method of obtaining a hollow molded article by injection blow molding a resin composition containing copolymerized nylon has been proposed (Japanese Patent Application Laid-Open No. 08-164694). However, this method does not sufficiently improve the shapeability. And there is a problem in stable moldability. The reason is that it is effective to increase the amount of 6-66 copolymer nylon to reduce the crystallinity of the preform, but if the amount of 6-66 copolymer nylon is increased, the amount of tough nylon is relatively increased. This is because the required flexibility is lost.
【０００７】[0007]
【発明が解決しようとする課題】従って、本発明の目的
とするところは、上記従来技術の問題点を解決し、特定
のポリアミド組成物から成り、柔軟性、ガスバリア性な
どに優れるばかりでなく、インジェクションブロー成形
法にて安定的にかつ生産性良く成形可能な中空成形品を
提供する事にある。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems of the prior art, comprising not only a special polyamide composition, but also excellent flexibility and gas barrier properties. An object of the present invention is to provide a hollow molded article that can be formed stably and with high productivity by the injection blow molding method.
【０００８】[0008]
【課題を解決するための手段】上記目的は、少なくとも
７０重量％以上の６−６６共重合ナイロンを含むポリア
ミド樹脂混合物５０〜９０重量％と変性ポリオレフィン
１０〜５０重量％からなるポリアミド樹脂組成物をイン
ジェクションブロー成形法により成形した中空成形品に
より達成される。The object of the present invention is to provide a polyamide resin composition comprising 50 to 90% by weight of a polyamide resin mixture containing at least 70% by weight or more of 6-66 copolymer nylon and 10 to 50% by weight of a modified polyolefin. This is achieved by a hollow molded article formed by an injection blow molding method.
【０００９】[0009]
【発明の実施の形態】以下、本発明を詳細に説明する。
本発明に使用する６−６６共重合ナイロンとは、６ナイ
ロンの原料であるε−カプロラクタム及び６６ナイロン
の原料であるアジピン酸とヘキサメチレンジアミンの塩
（ＡＨ塩）を原料として、縮重合により合成される共重
合ナイロンを指す。その共重合モル比は特に制限されな
いが、結晶化度低減効果を高めるため、共重合体におけ
る６ナイロン骨格のモル比を２〜９８％とすることが好
ましい。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.
The 6-66 copolymer nylon used in the present invention is synthesized by condensation polymerization using ε-caprolactam, which is a raw material of 6 nylon, and a salt of adipic acid and hexamethylenediamine (AH salt), which are raw materials of 66 nylon, as raw materials. Refers to the copolymerized nylon. The copolymerization molar ratio is not particularly limited, but the molar ratio of the 6 nylon skeleton in the copolymer is preferably set to 2 to 98% in order to enhance the effect of reducing the crystallinity.
【００１０】本発明におけるポリアミド樹脂混合物と
は、６−６６共重合ナイロンとその他のポリアミド類
（例えばナイロン６，ナイロン１１，ナイロン１２など
のポリラクタム類、ナイロン６６，ナイロン４６，ナイ
ロン６１０，ナイロン６１２などのジアミンとジカルボ
ン酸との縮重合によって得られるポリアミド類、及びこ
れらのポリアミド類の２種類以上をブレンドしたポリア
ミド類など）との混合物を指す。The polyamide resin mixture in the present invention includes 6-66 copolymerized nylon and other polyamides (for example, polylactams such as nylon 6, nylon 11, nylon 12, nylon 66, nylon 46, nylon 610, nylon 612, etc.). And polyamides obtained by polycondensation of a diamine and a dicarboxylic acid, and polyamides obtained by blending two or more of these polyamides.
【００１１】上記ポリアミド樹脂混合物において、６−
６６共重合ナイロンの割合が７０重量％未満の場合は、
結晶化度低減効果が小さいため、目的とするインジェク
ションブロー成形時の賦型性向上につながらないため好
ましくない。In the above polyamide resin mixture, 6-
When the proportion of 66 copolymerized nylon is less than 70% by weight,
Since the effect of reducing the crystallinity is small, it is not preferable because it does not lead to the improvement of the moldability during the intended injection blow molding.
【００１２】本発明において、変性ポリオレフィンを配
合する目的は、本発明のポリアミド組成物の柔軟性を向
上させる事であり、具体的にはそのポリアミド組成物か
らなる成形品の曲げ弾性率を１．８ＧＰａ以下にする事
が好ましい。In the present invention, the purpose of blending the modified polyolefin is to improve the flexibility of the polyamide composition of the present invention. Specifically, the flexural modulus of a molded article made of the polyamide composition is set to 1. It is preferable to make it 8 GPa or less.
【００１３】変性ポリオレフィンの種類としては、既に
公知のものを使用し得る。変性ポリオレフィンの具体例
としては、ポリオレフィンにα，β不飽和カルボン酸ま
たはその無水物をグラフト重合させたもの、あるいは共
重合により主鎖にカルボン酸またはそのエステル化物、
あるいはその金属塩などを導入したポリオレフィンなど
が挙げられる。また、ポリアミド成分との相溶性を阻害
しない程度に未変性のポリオレフィンを併用する事が出
来る。As the type of the modified polyolefin, those already known can be used. Specific examples of the modified polyolefin include a polyolefin obtained by graft polymerization of an α, β unsaturated carboxylic acid or an anhydride thereof, or a carboxylic acid or an esterified product thereof in a main chain by copolymerization;
Alternatively, a polyolefin into which a metal salt or the like is introduced may be used. Further, an unmodified polyolefin can be used in combination to such an extent that the compatibility with the polyamide component is not impaired.
【００１４】ポリアミド樹脂混合物と変性ポリオレフィ
ンの配合比は、ポリアミド樹脂混合物５０〜９０重量
％、変性ポリオレフィン１０〜５０重量％である。ポリ
オレフィンの含有量が１０重量％未満の場合、目的とす
る柔軟性が得られず好ましくない。また、変性ポリオレ
フィンの含有量が５０重量％を越えると、ポリアミド樹
脂の長所であるガスバリア性が著しく低下するため好ま
しくない。The mixing ratio of the polyamide resin mixture and the modified polyolefin is 50 to 90% by weight of the polyamide resin mixture and 10 to 50% by weight of the modified polyolefin. If the content of the polyolefin is less than 10% by weight, the desired flexibility cannot be obtained, which is not preferable. On the other hand, when the content of the modified polyolefin exceeds 50% by weight, the gas barrier property, which is an advantage of the polyamide resin, is unpreferably reduced.
【００１５】ポリアミド樹脂混合物と変性ポリオレフィ
ンの配合方法は特に制限されず、公知の手法を取り得る
が、両者の混合分散性を考慮すると、単軸あるいは二軸
以上の押出機などで両者を均一に溶融混合する方法が好
ましい。The method of blending the polyamide resin mixture and the modified polyolefin is not particularly limited, and any known method can be employed. However, considering the mixing and dispersibility of both, the two are uniformly mixed with a single-screw or twin-screw extruder or the like. A method of melt-mixing is preferred.
【００１６】本発明のポリアミド樹脂組成物には、一般
に用いられる添加剤、例えば酸化防止剤、熱安定剤、紫
外線吸収剤、難燃剤、結晶核剤、離型剤、滑剤、染料及
び顔料、さらには他種ポリマーなどを添加する事が出来
る。The polyamide resin composition of the present invention contains generally used additives such as an antioxidant, a heat stabilizer, an ultraviolet absorber, a flame retardant, a crystal nucleating agent, a release agent, a lubricant, a dye and a pigment. Can be added with other polymers.
【００１７】本発明で言うインジェクションブロー成形
法とは、最初に射出成形により成形品の雛型であるプリ
フォームを成形し、それに空気を吹き込む事により中空
成形品を得る方法を言う。The injection blow molding method referred to in the present invention refers to a method in which a preform, which is a model of a molded article, is first molded by injection molding, and air is blown into the preform to obtain a hollow molded article.
【００１８】[0018]
【発明の効果】本発明の中空成形品は、柔軟性、ガスバ
リア性などに優れるばかりでなく、インジェクションブ
ロー成形法にて安定的に生産性に優れた成形が可能であ
るため、自動車用途、食品容器、文具類の本体部分など
に広く応用出来る。特に文具類などの容器で、指などで
加圧する事により内容物を押し出して使用する様な用途
に最適である。EFFECT OF THE INVENTION The hollow molded article of the present invention is excellent not only in flexibility and gas barrier properties, but also can be molded stably with excellent productivity by the injection blow molding method. It can be widely applied to containers, stationery bodies, etc. It is especially suitable for applications such as stationery containers where the contents are extruded and used by pressing with a finger or the like.
【００１９】[0019]
【実施例】以下の実施例によって本発明を具体的に説明
するが、本発明はこれらの実施例に限定されるものでは
ない。尚、実施例及び比較例に記載されているポリアミ
ド樹脂の相対粘度は、ＪＩＳ Ｋ６８１０に従い、９８
％硫酸中、２５℃で測定した。The present invention will be described in detail with reference to the following examples, but the present invention is not limited to these examples. The relative viscosity of the polyamide resin described in Examples and Comparative Examples was 98 in accordance with JIS K6810.
% Sulfuric acid at 25 ° C.
【００２０】実施例１〜８及び比較例１〜６ まず、常法によりε−カプロラクタムとＡＨ塩よりモル
比８５：１５、相対粘度ηｒ＝２．５の６−６６共重合
ナイロン［Ａ］を合成した。次いで、得られた６−６６
共重合ナイロン［Ａ］と相対粘度ηｒ＝２．７の６ナイ
ロン［Ｂ］（カネボウ合繊社製 ＭＣ１１２Ｌ）、変性
ポリオレフィン［Ｃ］（酸変性ポリオレフィン，三井石
油化学社製 タフマーＭＰ０６１０）、変性ポリオレフ
ィン［Ｄ］（アイオノマー樹脂，三井デュポン社製 ハ
イミラン１８５５）を表１記載の配合比に従って、２軸
押出機（スクリュー径 ３０ｍｍ）にてシリンダー温度
２５０℃で溶融混合し、ペレットを得た。さらに、得ら
れたペレットを９０℃で１２時間減圧乾燥した。Examples 1 to 8 and Comparative Examples 1 to 6 First, 6-66 copolymer nylon [A] having a molar ratio of 85:15 and a relative viscosity ηr = 2.5 was prepared from ε-caprolactam and an AH salt by a conventional method. Synthesized. Then, the obtained 6-66
Copolymerized nylon [A] and 6 nylon [B] with relative viscosity ηr = 2.7 (MC112L manufactured by Kanebo Gosen), modified polyolefin [C] (acid-modified polyolefin, Tuffmer MP0610 manufactured by Mitsui Petrochemical Co., Ltd.), modified polyolefin [ D] (ionomer resin, Himilan 1855, manufactured by Du Pont-Mitsui Co., Ltd.) was melt-mixed at a cylinder temperature of 250 ° C. using a twin-screw extruder (screw diameter: 30 mm) according to the compounding ratio shown in Table 1. Further, the obtained pellet was dried at 90 ° C. under reduced pressure for 12 hours.
【００２１】[0021]
【表１】 [Table 1]
【００２２】実施例１〜８及び比較例１〜６の各ペレッ
トから射出成形により試験片を作成し、ＡＳＴＭ Ｄ７
９０に従って曲げ弾性率を測定した。その結果を表２に
示す。Test pieces were prepared from each of the pellets of Examples 1 to 8 and Comparative Examples 1 to 6 by injection molding, and subjected to ASTM D7.
The flexural modulus was measured according to 90. Table 2 shows the results.
【００２３】次いで、実施例１〜８の各ペレットをイン
ジェクションブロー成形機（青木固研究所製 ＳＢIII-
１００ＬＬ−２０）にて、シリンダー温度２３０℃、金
型温度１８℃の条件で成形し、５００ccの中空成形品を
得た。比較例１〜６の各ペレットは上記成形条件では成
形が困難であったため、金型温度を１８℃〜１００℃ま
で変化させて成形したが、良好な成形品は得られなかっ
た。実施例１〜８及び比較例１〜６の成形結果について
表２にまとめた。Next, each of the pellets of Examples 1 to 8 was injected into an injection blow molding machine (SBIII-
At 100 LL-20), molding was performed under the conditions of a cylinder temperature of 230 ° C. and a mold temperature of 18 ° C. to obtain a 500 cc hollow molded article. Each of the pellets of Comparative Examples 1 to 6 was difficult to mold under the above molding conditions, and was molded by changing the mold temperature from 18 ° C to 100 ° C, but no good molded product was obtained. Table 2 summarizes the molding results of Examples 1 to 8 and Comparative Examples 1 to 6.
【００２４】尚、プリフォーム成形性とブロー成形性に
ついての総合評価を、下記基準に従って行った結果も、
合わせて表２に示した。The results of comprehensive evaluation of preform moldability and blow moldability according to the following criteria were also obtained.
The results are shown in Table 2.
【００２５】 ○；成形性良好 △；成形が不安定で成形品に問題有り。 ×；成形不可○: good moldability △: molding is unstable and there is a problem with the molded product. ×; molding not possible
【００２６】[0026]
【表２】 [Table 2]
【００２７】表２に見られる様に、比較例１〜６は射出
成形によるプリフォームの成形性は良好であるが、得ら
れたプリフォームの結晶化が進行しているため、ブロー
段階でうまく膨らまず、良好な成形品が得られない。As shown in Table 2, in Comparative Examples 1 to 6, the moldability of the preform by injection molding was good, but since the crystallization of the obtained preform was progressing, the preform was successfully formed in the blow stage. It does not expand and a good molded product cannot be obtained.
【００２８】一方、実施例１〜８については、プリフォ
ームの成形性、ブロー段階の賦型性ともに問題無く、良
好な成形品が得られた。また、得られた成形品は全て曲
げ弾性率が１．８ＧＰａ以下で柔軟性も良好であった。On the other hand, in Examples 1 to 8, good molded products were obtained without any problems in both the moldability of the preform and the moldability in the blow stage. In addition, all of the obtained molded products had a flexural modulus of 1.8 GPa or less and had good flexibility.
【００２９】以上の様に、本発明の中空成形品は、柔軟
性やガスバリア性などの物性に優れるばかりでなく、イ
ンジェクションブロー成形法によって、安定的に生産性
に優れた成形が可能であり、様々な用途に応用可能な極
めて有用な成形品である。As described above, the hollow molded article of the present invention not only has excellent physical properties such as flexibility and gas barrier properties, but also can be molded stably with excellent productivity by the injection blow molding method. It is a very useful molded product that can be applied to various uses.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 大西 克己 山口県防府市鐘紡町５−２−２ ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Katsumi Onishi 5-2-2 Kanebocho, Hofu City, Yamaguchi Prefecture
Claims (1)
重合ナイロンを含むポリアミド樹脂混合物５０〜９０重
量％と変性ポリオレフィン１０〜５０重量％からなるポ
リアミド樹脂組成物を、インジェクションブロー成形法
により成形した中空成形品。1. A polyamide resin composition comprising 50 to 90% by weight of a polyamide resin mixture containing at least 70% by weight or more of 6-66 copolymerized nylon and 10 to 50% by weight of a modified polyolefin was molded by injection blow molding. Hollow molded products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7351898A JPH11245927A (en) | 1998-03-05 | 1998-03-05 | Hollow molded article |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7351898A JPH11245927A (en) | 1998-03-05 | 1998-03-05 | Hollow molded article |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11245927A true JPH11245927A (en) | 1999-09-14 |
Family
ID=13520555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7351898A Pending JPH11245927A (en) | 1998-03-05 | 1998-03-05 | Hollow molded article |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11245927A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021085472A1 (en) | 2019-10-30 | 2021-05-06 | 宇部興産株式会社 | Polyamide resin composition |
-
1998
- 1998-03-05 JP JP7351898A patent/JPH11245927A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021085472A1 (en) | 2019-10-30 | 2021-05-06 | 宇部興産株式会社 | Polyamide resin composition |
| KR20220094192A (en) | 2019-10-30 | 2022-07-05 | 우베 가부시키가이샤 | polyamide resin composition |
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