JP2005067107A - Resin-made composite part for automobile - Google Patents
Resin-made composite part for automobile Download PDFInfo
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- JP2005067107A JP2005067107A JP2003302285A JP2003302285A JP2005067107A JP 2005067107 A JP2005067107 A JP 2005067107A JP 2003302285 A JP2003302285 A JP 2003302285A JP 2003302285 A JP2003302285 A JP 2003302285A JP 2005067107 A JP2005067107 A JP 2005067107A
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- polyamide
- fuel
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- 239000002131 composite material Substances 0.000 title claims abstract description 13
- 229920006122 polyamide resin Polymers 0.000 claims abstract description 25
- 229920005672 polyolefin resin Polymers 0.000 claims abstract description 23
- 239000000454 talc Substances 0.000 claims abstract description 23
- 229910052623 talc Inorganic materials 0.000 claims abstract description 23
- 238000001746 injection moulding Methods 0.000 claims abstract description 16
- 239000012765 fibrous filler Substances 0.000 claims abstract description 12
- 239000011342 resin composition Substances 0.000 claims description 56
- 229920005989 resin Polymers 0.000 claims description 40
- 239000011347 resin Substances 0.000 claims description 40
- 239000000805 composite resin Substances 0.000 claims description 31
- 229920001903 high density polyethylene Polymers 0.000 claims description 17
- 239000004700 high-density polyethylene Substances 0.000 claims description 17
- 229920002647 polyamide Polymers 0.000 claims description 17
- 239000003365 glass fiber Substances 0.000 claims description 16
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 claims description 14
- 239000002828 fuel tank Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 10
- FDLQZKYLHJJBHD-UHFFFAOYSA-N [3-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=CC(CN)=C1 FDLQZKYLHJJBHD-UHFFFAOYSA-N 0.000 claims description 7
- 235000011037 adipic acid Nutrition 0.000 claims description 7
- 239000001361 adipic acid Substances 0.000 claims description 7
- ISKQADXMHQSTHK-UHFFFAOYSA-N [4-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=C(CN)C=C1 ISKQADXMHQSTHK-UHFFFAOYSA-N 0.000 claims description 6
- FIRQYUPQXNPTKO-UHFFFAOYSA-N ctk0i2755 Chemical compound N[SiH2]N FIRQYUPQXNPTKO-UHFFFAOYSA-N 0.000 claims description 2
- 239000000446 fuel Substances 0.000 abstract description 45
- 230000004888 barrier function Effects 0.000 abstract description 24
- 239000002737 fuel gas Substances 0.000 abstract description 20
- 229920006121 Polyxylylene adipamide Polymers 0.000 abstract description 7
- 239000000203 mixture Substances 0.000 abstract description 7
- 238000013329 compounding Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 19
- 239000000047 product Substances 0.000 description 16
- 238000000465 moulding Methods 0.000 description 14
- 229920002302 Nylon 6,6 Polymers 0.000 description 11
- 239000004952 Polyamide Substances 0.000 description 10
- 239000008188 pellet Substances 0.000 description 10
- 239000003795 chemical substances by application Substances 0.000 description 9
- 229920000299 Nylon 12 Polymers 0.000 description 8
- 239000000853 adhesive Substances 0.000 description 7
- 230000001070 adhesive effect Effects 0.000 description 7
- 238000005452 bending Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- -1 polymetaxylylene Polymers 0.000 description 7
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 229920005992 thermoplastic resin Polymers 0.000 description 6
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 description 5
- 239000003502 gasoline Substances 0.000 description 5
- 239000010445 mica Substances 0.000 description 5
- 229910052618 mica group Inorganic materials 0.000 description 5
- 229920013716 polyethylene resin Polymers 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- 229920002292 Nylon 6 Polymers 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000009864 tensile test Methods 0.000 description 3
- GVNWZKBFMFUVNX-UHFFFAOYSA-N Adipamide Chemical compound NC(=O)CCCCC(N)=O GVNWZKBFMFUVNX-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 229920000571 Nylon 11 Polymers 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 238000010227 cup method (microbiological evaluation) Methods 0.000 description 2
- 150000004985 diamines Chemical class 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 229920001955 polyphenylene ether Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000012744 reinforcing agent 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
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 239000004705 High-molecular-weight polyethylene Substances 0.000 description 1
- NHTMVDHEPJAVLT-UHFFFAOYSA-N Isooctane Chemical compound CC(C)CC(C)(C)C NHTMVDHEPJAVLT-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229920003189 Nylon 4,6 Polymers 0.000 description 1
- 229920000572 Nylon 6/12 Polymers 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 description 1
- GKXVJHDEWHKBFH-UHFFFAOYSA-N [2-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=CC=C1CN GKXVJHDEWHKBFH-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- OJMOMXZKOWKUTA-UHFFFAOYSA-N aluminum;borate Chemical compound [Al+3].[O-]B([O-])[O-] OJMOMXZKOWKUTA-UHFFFAOYSA-N 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 229920006026 co-polymeric resin Polymers 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000003484 crystal nucleating agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- JVSWJIKNEAIKJW-UHFFFAOYSA-N dimethyl-hexane Natural products CCCCCC(C)C JVSWJIKNEAIKJW-UHFFFAOYSA-N 0.000 description 1
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000004611 light stabiliser Substances 0.000 description 1
- 229920000092 linear low density polyethylene Polymers 0.000 description 1
- 239000004707 linear low-density polyethylene Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229920001179 medium density polyethylene Polymers 0.000 description 1
- 239000004701 medium-density polyethylene Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 229920006342 thermoplastic vulcanizate Polymers 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- KNXVOGGZOFOROK-UHFFFAOYSA-N trimagnesium;dioxido(oxo)silane;hydroxy-oxido-oxosilane Chemical compound [Mg+2].[Mg+2].[Mg+2].O[Si]([O-])=O.O[Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O KNXVOGGZOFOROK-UHFFFAOYSA-N 0.000 description 1
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 0.000 description 1
Abstract
Description
本発明は、自動車用樹脂製複合部品に関する。さらに詳しくは、燃料および／または燃料ガスが直接接触する部品（以下、燃料系部品と略称することがある。）に使用される自動車用樹脂製複合部品に関する。 The present invention relates to a resin composite part for automobiles. More specifically, the present invention relates to a resin composite part for automobiles used for a part (hereinafter sometimes abbreviated as a fuel system part) in direct contact with fuel and / or fuel gas.
自動車用の燃料タンクの樹脂化と共に、燃料タンクに付属する継手、パイプ、蓋体などの各種自動車部品の樹脂化も検討されている。各種部品製造用樹脂材料としては、樹脂製燃料タンク本体との溶着性が良好であることから、タンク本体と同じ素材の高密度ポリエチレン樹脂が使用されている。しかし、高密度ポリエチレン樹脂は、特にガソリンなどの揮発性の燃料および／または燃料ガスのバリア性が劣り、燃料タンクに付属する継手、パイプ、蓋体などから、燃料および／または燃料ガスが透過する。 In addition to the plasticization of fuel tanks for automobiles, various plastic parts such as joints, pipes and lids attached to the fuel tank are also being considered. As a resin material for manufacturing various parts, a high-density polyethylene resin made of the same material as the tank body is used because of its good weldability with the resin fuel tank body. However, the high density polyethylene resin is inferior in the barrier property of volatile fuel and / or fuel gas such as gasoline in particular, and allows the fuel and / or fuel gas to permeate from a joint, pipe, lid, etc. attached to the fuel tank. .
このため、環境面と安全性の観点から、高密度ポリエチレン樹脂より優れた燃料および／または燃料ガスのバリア性を有する樹脂製部品が、希求されている。最近では高密度ポリエチレン樹脂以外の樹脂による樹脂化も検討され、フッ素系樹脂、ポリビニルアルコール系樹脂、ポリアミド系樹脂などの燃料および／または燃料ガスのバリア性に優れた樹脂が注目され、樹脂製燃料タンクなどの燃料と接触する部品（燃料系部品）製造用材料として検討や開発が行われている。 For this reason, from the viewpoints of environment and safety, there is a demand for resin parts having a fuel and / or fuel gas barrier property superior to high-density polyethylene resins. Recently, the use of resins other than high-density polyethylene resins has been studied, and resins with excellent fuel and / or fuel gas barrier properties such as fluororesins, polyvinyl alcohol resins, and polyamide resins have attracted attention. Studies and development are being carried out as materials for manufacturing parts (fuel system parts) that come into contact with fuel such as tanks.
例えば、燃料系部品製造用としてナイロン１２系樹脂の使用が試みられているが、ナイロン１２系樹脂は、多くのポリアミド系樹脂群の中では燃料および燃料ガスバリア性が劣るため、燃料系部品製造用の材料としては十分といえない。また、ナイロン１２系樹脂が燃料タンクの素材のポリエチレン系樹脂と十分に溶着できるように、ポリエチレン系樹脂との複合部材として使用することが検討されているが、ナイロン１２系樹脂は、ポリエチレン系樹脂との熱融着性が悪く、これらを組み合わせた複合部品は強度の点で不十分となる。 For example, the use of nylon 12-based resins has been attempted for the production of fuel-based parts, but nylon 12-based resins are poor in fuel and fuel gas barrier properties among many polyamide-based resin groups. It is not enough as a material. Further, it has been studied to use nylon 12 resin as a composite member with polyethylene resin so that the nylon 12 resin can be sufficiently welded with the polyethylene resin of the fuel tank material. Therefore, a composite part combining these is insufficient in terms of strength.
高密度ポリエチレン樹脂の代わりにグラスファイバ充填剤で補強されたポリアミドをパイプ継手部材に使用する提案されており（特許文献１参照）、ポリアミド樹脂として、ポリアミド６、ポリアミド６６、ポリアミド６４、ポリアミド１１、ポリアミド１２などが挙げられている。しかし、このようなポリアミド樹脂では、燃料および／または燃料ガスのバリア性が不十分であり、燃料および／または燃料ガスの透過・飛散が避けられない。 It has been proposed to use a polyamide reinforced with a glass fiber filler instead of a high-density polyethylene resin for a pipe joint member (see Patent Document 1). As a polyamide resin, polyamide 6, polyamide 66, polyamide 64, polyamide 11, Polyamide 12 and the like are mentioned. However, in such a polyamide resin, the barrier property of fuel and / or fuel gas is insufficient, and permeation and scattering of fuel and / or fuel gas are inevitable.
また、熱可塑性樹脂からなる部材と、フィラーを含むポリオレフィン系樹脂組成物からなる部品が接合された複合部品が提案されている（特許文献２参照）。この複合材を燃料系部品に使用する場合、接着性は改良されるが、熱可塑性樹脂の種類によっては燃料および／または燃料ガスのバリア性が不十分であり、要求を満たす樹脂製部品を得ることが困難である。 Further, there has been proposed a composite part in which a member made of a thermoplastic resin and a part made of a polyolefin resin composition containing a filler are joined (see Patent Document 2). When this composite material is used for fuel system parts, the adhesion is improved, but depending on the type of thermoplastic resin, the barrier property of fuel and / or fuel gas is insufficient, and a resin part that satisfies the requirements is obtained. Is difficult.
さらに、ポリメタキシリレンアジパミドなどのポリアミド重合体と、エポキシ基含有エチレン系共重合体を含むポリアミド系樹脂組成物からなる層と、変性ポリエチレン系樹脂含有の樹脂組成物からなる層との融着積層体が提案されている（特許文献３参照）。この積層体は、ガソリンのバリア性が高く、燃料タンク付属バルブなどの自動車部品に使用されるが、この積層体を用いて射出成形法によって複合部品とする場合、ポリメタキシリレンアジパミドはナイロン６やナイロン６６などに比べ結晶化速度が遅く、使用するポリアミド重合体によっては効率よく実用的な製品を得ることが困難である。
本発明は、かかる状況にあって、自動車部品に要求される強度、剛性、燃料および燃料ガスのバリア性に優れ、燃料および／または燃料ガスが直接接触する部品（燃料系部品）に好適に使用し得る樹脂製複合部品を提供するべく、鋭意検討した結果、本発明を完成したものである。 In such a situation, the present invention is excellent in strength, rigidity, fuel and fuel gas barrier properties required for automobile parts, and is preferably used for parts (fuel system parts) in direct contact with fuel and / or fuel gas. The present invention has been completed as a result of intensive studies to provide a resin composite part that can be made.
すなわち、本発明の目的は次のとおりである。
１．自動車部品に要求される強度、剛性に優れると共に、燃料および／または燃料ガスのバリア性に優れ、かつ、射出成形によって実用的な製品を効率よく製造できる自動車用樹脂製複合部品を提供すること。
２．燃料タンク本体に付属し、燃料および／または燃料ガスが直接接触する継手、パイプ、蓋体、バルブなどの燃料系部品に使用する自動車用樹脂製複合部材を提供すること。
３．上記樹脂製複合部品を組み合わされ、強度、剛性に優れると共に、自動車部品に要求される安全性などの信頼性が高い自動車用樹脂製複合部品を提供すること。
That is, the object of the present invention is as follows.
1. To provide a resin composite part for automobiles that is excellent in strength and rigidity required for automobile parts, has excellent fuel and / or fuel gas barrier properties, and can efficiently produce practical products by injection molding.
2. To provide a resin composite member for automobiles, which is attached to a fuel tank body and used for fuel system parts such as joints, pipes, lids, valves and the like which are in direct contact with fuel and / or fuel gas.
3. Provided is a resin composite part for automobiles which is combined with the resin composite parts and has high strength and rigidity and high reliability such as safety required for automobile parts.
上記課題を解決するため、本発明では、メタキシリレンジアミン５５〜１００モル％、およびパラキシリレンジアミン４５〜０モル％からなる混合シリレンジアミンと、アジピン酸とから得られたポリアミド樹脂を５０重量％以上含むポリアミド系樹脂１００重量部に対し、タルク０．１〜１０重量部および繊維状フィラー４０〜１５０重量部配合されてなる樹脂組成物（Ａ）からなる部品と、ポリオレフィン系樹脂（Ｂ）からなる部品とが一体化されてなることを特徴とする、自動車用樹脂製複合部品を提供する。 In order to solve the above-mentioned problems, in the present invention, 50 wt.% Of a polyamide resin obtained from a mixed silylenediamine consisting of 55 to 100 mol% of metaxylylenediamine and 45 to 0 mol% of paraxylylenediamine and adipic acid is used. % Of a polyamide resin containing 100% by weight or more, a component comprising a resin composition (A) in which 0.1 to 10 parts by weight of talc and 40 to 150 parts by weight of a fibrous filler are blended, and a polyolefin resin (B) The present invention provides a resin composite part for automobiles, characterized in that the parts are integrated with each other.
本発明は、次のような特別に有利な効果を奏し、その産業上の利用価値は極めて大である。
１．本発明に係る自動車用樹脂製複合部品は、強度、剛性に優れており、自動車用部品として有用である。
２．本発明に係る自動車用樹脂製複合部品は、自動車用燃料、特にガソリンなどの揮発性の燃料および／または燃料ガスのバリア性に優れている。
３．本発明に係る自動車用樹脂製複合部品は、射出成形法によって実用的な製品を効率よく得ることができる。
４．本発明に係る自動車用樹脂製複合部品としての燃料タンク付属バルブは、強度、剛性に優れると共に、燃料および／または燃料ガスのバリア性に優れている。
５．本発明に係る自動車用樹脂製複合部品は、良好な接着強度を発揮する。
６．本発明に係る自動車用樹脂製複合部品を自動車燃料タンク本体と組み合わせるときは、タンク本体と良好な溶着性を発揮し、安全で信頼性の高い自動車用樹脂製複合部品が得られる。
The present invention has the following particularly advantageous effects, and its industrial utility value is extremely great.
1. The resin composite part for automobiles according to the present invention is excellent in strength and rigidity and is useful as an automobile part.
2. The resin composite component for automobiles according to the present invention is excellent in barrier properties for automobile fuel, particularly volatile fuel such as gasoline and / or fuel gas.
3. The resin composite part for automobiles according to the present invention can efficiently obtain a practical product by an injection molding method.
4). The valve attached to a fuel tank as a resin composite part for automobiles according to the present invention is excellent in strength and rigidity and excellent in fuel and / or fuel gas barrier properties.
5). The resin composite part for automobiles according to the present invention exhibits good adhesive strength.
6). When the automobile resin composite part according to the present invention is combined with an automobile fuel tank main body, it exhibits good weldability with the tank main body, and a safe and highly reliable resin composite part for an automobile is obtained.
以下、本発明を詳細に説明する。本発明に係る自動車用樹脂製複合部品は、樹脂組成物（Ａ）からなる部品とポリオレフィン系樹脂（Ｂ）からなる部品とが一体化されてなるものである。本発明において樹脂組成物（Ａ）は、ポリアミド系樹脂(A1)と、タルク(A2)および繊維状フィラー(A3)とによって構成される。 Hereinafter, the present invention will be described in detail. The resin composite part for automobiles according to the present invention is formed by integrating a part made of a resin composition (A) and a part made of a polyolefin resin (B). In the present invention, the resin composition (A) is composed of a polyamide resin (A1), talc (A2), and fibrous filler (A3).
ポリアミド系樹脂(A1)は、メタキシリレンジアミン５５〜１００モル％、およびパラキシリレンジアミン４５〜０モル％からなるキシリレンジアミンと、アジピン酸とから得られるポリアミド重合体から構成される。メタキシリレンジアミンが５５モル％未満、すなわちパラキシリレンジアミンが４５モル％を超えると、得られるポリアミド系樹脂(A1)の融点が非常に高くなり、実用的な射出成形条件を超えるものとなり、また併用するポリオレフィン系樹脂との著しい融点差により不良を発生の原因となる恐れがある。上記ポリアミド系樹脂(A1)は、好ましくは末端基数より計算した数平均分子量が１００００〜４００００の範囲のものが好適である。数平均分子量が１００００未満では、部品に要求される強度が得られず、また４００００を超えると高粘度なり射出成形法による部品の製造が困難となり、いずれも好ましくない。 The polyamide-based resin (A1) is composed of a polyamide polymer obtained from xylylenediamine composed of 55 to 100 mol% of metaxylylenediamine and 45 to 0 mol% of paraxylylenediamine and adipic acid. When the metaxylylenediamine is less than 55 mol%, that is, when the paraxylylenediamine exceeds 45 mol%, the resulting polyamide-based resin (A1) has a very high melting point, which exceeds practical injection molding conditions. Moreover, there is a risk of causing defects due to a significant difference in melting point from the polyolefin resin used in combination. The polyamide resin (A1) preferably has a number average molecular weight calculated from the number of terminal groups in the range of 10,000 to 40,000. If the number average molecular weight is less than 10,000, the strength required for the part cannot be obtained, and if it exceeds 40,000, the viscosity becomes so high that it is difficult to produce the part by the injection molding method.
樹脂組成物（Ａ）は、ポリアミド系樹脂(A1)を５０重量％以上含むことが必要である。この樹脂組成物（Ａ）にはポリアミド系樹脂(A1)の外に、５０重量％以下の範囲内で、他の熱可塑性樹脂が配合されていてもよい。他の熱可塑性樹脂としては、特に制限はないが、例えば、上記ポリアミド系樹脂(A1)以外のポリアミド樹脂(A4)、ポリエステル樹脂、ポリプロピレン樹脂、ポリエチレン樹脂、ポリフェニレンエーテル樹脂、ポリフェニレンスルフィド樹脂などが挙げられる。他の熱可塑性樹脂は、単独でも２種以上の混合物であってもよい。上に挙げた他の熱可塑性樹脂の中でも好ましいのは、上記ポリアミド系樹脂(A1)以外のポリアミド樹脂(A4)、ポリプロピレン樹脂、ポリフェニレンエーテル樹脂などである。 The resin composition (A) needs to contain 50% by weight or more of the polyamide resin (A1). In the resin composition (A), in addition to the polyamide-based resin (A1), another thermoplastic resin may be blended within a range of 50% by weight or less. Other thermoplastic resins are not particularly limited, and examples include polyamide resins (A4) other than the polyamide-based resin (A1), polyester resins, polypropylene resins, polyethylene resins, polyphenylene ether resins, and polyphenylene sulfide resins. It is done. Other thermoplastic resins may be used alone or as a mixture of two or more. Among the other thermoplastic resins listed above, polyamide resin (A4) other than the polyamide resin (A1), polypropylene resin, polyphenylene ether resin and the like are preferable.
ポリアミド樹脂(A4)としては、ポリアミド６、ポリアミド６６、ポリアミド４６、ポリアミド６／６６、ポリアミド１０、ポリアミド６１２、ポリアミド１１、ポリアミド１２、メタキシリレンジアミン、パラキシリレンジアミン、アジピン酸およびテレフタル酸からなるポリアミドＭＰ６Ｔ、ヘキサメチレンジアミン、アジピン酸およびテレフタル酸からなるポリアミド６６Ｔ、ヘキサメチレンジアミン、イソフタル酸およびテレフタル酸からなるポリアミド６ＩＴなどが挙げられる。 Polyamide resin (A4) includes polyamide 6, polyamide 66, polyamide 46, polyamide 6/66, polyamide 10, polyamide 612, polyamide 11, polyamide 12, metaxylylenediamine, paraxylylenediamine, adipic acid and terephthalic acid. Polyamide MP6T, polyamide 66T composed of hexamethylenediamine, adipic acid and terephthalic acid, and polyamide 6IT composed of hexamethylenediamine, isophthalic acid and terephthalic acid.
樹脂組成物（Ａ）は、上記ポリアミド系樹脂(A1)を５０重量％以上含むポリアミド系樹脂１００重量部に対し、タルク(A2)０．１〜１０重量部および繊維状フィラー(A3)４０〜１５０重量部配合されてなる。タルク(A2)が０．１重量部未満では、樹脂組成物（Ａ）を原料として射出成形法によって部品を製造する際に、実用的な部品を効率よく製造することが困難であり、１０重量部を超えると、得られた部品の接着強度が低下し、いずれも好ましくない。タルク(A2)の好ましい配合量は、０．５〜８重量部である。 The resin composition (A) is composed of 0.1 to 10 parts by weight of talc (A2) and 40 to 40 parts of fibrous filler (A3) with respect to 100 parts by weight of the polyamide resin containing 50% by weight or more of the polyamide resin (A1). 150 parts by weight is blended. When the talc (A2) is less than 0.1 parts by weight, it is difficult to efficiently produce a practical part when the part is produced by the injection molding method using the resin composition (A) as a raw material. When it exceeds the part, the adhesive strength of the obtained part is lowered, and both are not preferable. A preferred amount of talc (A2) is 0.5 to 8 parts by weight.
繊維状フィラー(A3)が４０重量部未満では、自動車用部品に要求される強度、剛性を発揮することができず、１５０重量部を超えると、樹脂組成物（Ａ）の溶融粘度が非常に高くなり射出成形法によって部品を製造することが困難となり、いずれも好ましくない。樹脂組成物（Ａ）には、さらにマイカを配合することができる。マイカの配合量は、上記ポリアミド系樹脂(A1)１００重量部に対し、好ましくは１〜５０重量部であり、より好ましくは５〜４０重量部である。樹脂組成物（Ａ）にマイカを配合することにより、部品（成形品）のソリが改良される。 If the fibrous filler (A3) is less than 40 parts by weight, the strength and rigidity required for automotive parts cannot be exhibited, and if it exceeds 150 parts by weight, the melt viscosity of the resin composition (A) is very high. It becomes high and it becomes difficult to manufacture parts by the injection molding method. Mica can be further blended in the resin composition (A). The amount of mica is preferably 1 to 50 parts by weight, more preferably 5 to 40 parts by weight with respect to 100 parts by weight of the polyamide-based resin (A1). By blending mica into the resin composition (A), the warpage of the part (molded product) is improved.
ここで、実用的な部品とは、部品を金型キャビティから離型する際にエジェクターピンで押出すが、部品をエジェクターピンによって押出した際に変形が認められないもの、変形が認められてもそれが小さいものをいう。また、効率よく製造することができるとは、指標として、ＡＳＴＭ Ｄ−６３８に準拠した試験片を射出成形法によって製造する際、良品が得られる成形サイクルが６０秒以下であることをいう。さらに、自動車用部品に要求される強度、剛性とは、ＡＳＴＭ Ｄ−７９０に準拠して測定した曲げ試験における絶乾時の曲げ強度が、１８０ＭＰａ以上、曲げ弾性率が１０ＧＰａ以上であることをいう。 Here, a practical part is a part that is extruded with an ejector pin when the part is released from the mold cavity, but a part that is not deformed when the part is pushed with the ejector pin. That is a small thing. Moreover, being able to manufacture efficiently means that, as an index, when a test piece based on ASTM D-638 is manufactured by an injection molding method, a molding cycle for obtaining a good product is 60 seconds or less. Furthermore, the strength and rigidity required for automobile parts means that the bending strength at the time of absolutely dryness in a bending test measured in accordance with ASTM D-790 is 180 MPa or more and the bending elastic modulus is 10 GPa or more. .
本発明においてタルク(A2)とは、化学組成がＭｇ３(Ｓｉ４Ｏ１０)(ＯＨ)２で示される鉱物の一種で、白色ないし黄白色ないし淡黄白色の粉末のものをいう。タルク(A2)は結晶核剤として機能し、他のフィラーに比べ、その機能が大であり、ポリアミド系樹脂(A1)
の成形性をより向上させる。タルクの種類については特に制限はなく、従来から知られているものが使用される。
In the present invention, talc (A2) is a kind of mineral having a chemical composition represented by Mg 3 (Si 4 O 10 ) (OH) 2 , and is a white, yellowish white, or pale yellowish white powder. Talc (A2) functions as a crystal nucleating agent, and its function is large compared to other fillers. Polyamide resin (A1)
Further improve the moldability. There is no restriction | limiting in particular about the kind of talc, The conventionally known thing is used.
本発明において繊維状フィラー(A3)は強化剤として機能し、樹脂組成物（Ａ）の部品、この部品と接合させて得られる樹脂製複合部品の強度、剛性などを向上させる。繊維状フィラー(A3)としては、ワラストナイト、チタン酸カリウムウイスカー、ガラス繊維、炭素繊維などが挙げられ、中でも、ガラス繊維、炭素繊維などが好ましい。 In the present invention, the fibrous filler (A3) functions as a reinforcing agent, and improves the strength, rigidity and the like of the resin composition (A) component and the resin composite component obtained by bonding with the component. Examples of the fibrous filler (A3) include wollastonite, potassium titanate whisker, glass fiber, carbon fiber, etc. Among them, glass fiber, carbon fiber and the like are preferable.
上記ポリアミド系樹脂(A1)に、タルク(A2)および繊維状フィラー(A3)を配合して樹脂組成物（Ａ）とするには、任意の方法が採用され、例えば、単軸または二軸押出機を使用し、(i)押出機のホッパーにポリアミド系樹脂(A1)を投入し、タルク(A2)
および繊維状フィラー(A3)を押出機シリンダーの途中から投入して溶融混練してペレット化する方法、(ii)予めポリアミド系樹脂(A1)にタルク(A2) および繊維状フィラー(A3)を混合した後、得られた混合物を押出機のホッパーに投入して溶融混練する方法、などが挙げられる。
Arbitrary methods can be adopted to blend the polyamide resin (A1) with the talc (A2) and the fibrous filler (A3) to obtain the resin composition (A). (I) Put the polyamide resin (A1) into the hopper of the extruder and talc (A2)
And a method in which the fibrous filler (A3) is introduced from the middle of the extruder cylinder and melt-kneaded to form pellets. Then, the obtained mixture is put into a hopper of an extruder and melt kneaded.
上記樹脂組成物（Ａ）には、他に、樹脂組成物（Ａ）の機能を阻害しない範囲で、必要に応じ、難燃剤、帯電防止剤、可塑剤、熱安定剤、紫外線安定剤、酸化防止剤、着色剤、強化剤、離型剤、さらにカオリン、炭酸カルシウム、水酸化アルミニウム、ホウ酸アルミニウム、カラスビーズ、ガラスフレークなどを配合することもできる。 In addition to the resin composition (A), a flame retardant, an antistatic agent, a plasticizer, a heat stabilizer, an ultraviolet light stabilizer, an oxidation agent, as long as the function of the resin composition (A) is not impaired. An inhibitor, a colorant, a reinforcing agent, a release agent, and further kaolin, calcium carbonate, aluminum hydroxide, aluminum borate, crow beads, glass flakes, and the like can be blended.
本発明においてポリオレフィン系樹脂（Ｂ）とは、樹脂組成物（Ａ）と接着性を有するポリオレフィン系樹脂をいう。具体的には、ポリエチレン系樹脂、ポリプロピレン系樹脂、エチレン−プロピレン系共重合樹脂、これらの少なくとも１つの重合体をハードセグメントとし、ＥＰＤＭ、ＥＰＲ、ＥＯＲ、ＳＢＥＳ、ＳＢＳ等をソフトセグメントとする樹脂など挙げられる。より具体的には、高密度ポリエチレン、低密度ポリエチレン、中密度ポリエチレン、高分子量ポリエチレン、超高分子量ポリエチレン、線状低密度ポリエチレン、ポリプロピレン、ポリオレフィン系熱可塑性エラストマー、ポリオレフィン系熱可塑性加硫物などを酸変性した、酸変性ポリオレフィン樹脂や、エポキシ変性したエポキシ変性ポリオレフィン樹脂などが挙げられる。 In the present invention, the polyolefin resin (B) refers to a polyolefin resin having adhesiveness with the resin composition (A). Specifically, a polyethylene resin, a polypropylene resin, an ethylene-propylene copolymer resin, a resin in which at least one of these polymers is a hard segment, and a soft segment is EPDM, EPR, EOR, SBES, SBS, etc. Can be mentioned. More specifically, high density polyethylene, low density polyethylene, medium density polyethylene, high molecular weight polyethylene, ultra high molecular weight polyethylene, linear low density polyethylene, polypropylene, polyolefin-based thermoplastic elastomer, polyolefin-based thermoplastic vulcanizate, etc. Examples include acid-modified, acid-modified polyolefin resins, and epoxy-modified epoxy-modified polyolefin resins.
本発明に係る自動車用樹脂製複合部品は、樹脂組成物（Ａ）からなる部品と、ポリオレフィン系樹脂（Ｂ）からなる部品とが一体化されてなる部品をいう。両部品は、オーバーモールド成形法によって一体化するのが好ましい。本発明においてオーバーモールド成形法とは、(i)樹脂組成物（Ａ）またはポリオレフィン系樹脂（Ｂ）を原料として部材を射出成形法によって製造した後、直ちに得られた部品の内側面または外側面に、ポリオレフィン系樹脂（Ｂ）または樹脂組成物（Ａ）を射出成形法によって製造して一体化する「二色成形法」、(ii)樹脂組成物（Ａ）またはポリオレフィン系樹脂（Ｂ）を原料として部品を予め製造し、得られた部品を射出成形金型キャビティに装着し、この部品の内側面または外側面に、ポリオレフィン系樹脂（Ｂ）または樹脂組成物（Ａ）で追加成形して一体化する「アウトサートまたはインサート成形法」、(iii)樹脂組成物（Ａ）の部品とポリオレフィン系樹脂（Ｂ）の部品とをそれぞれ別々に成形し、二つの部品を熱板溶着法などで一体化する方法、などが挙げられる。形状自由度、生産性、コスト面から、(i)二色成形法、(ii)アウトサートまたはインサート成形法が好ましい。 The resin composite part for automobiles according to the present invention refers to a part in which a part made of a resin composition (A) and a part made of a polyolefin resin (B) are integrated. Both parts are preferably integrated by an overmolding method. In the present invention, the overmold molding method means (i) an inner surface or an outer surface of a part obtained immediately after a member is produced by an injection molding method using a resin composition (A) or a polyolefin resin (B) as a raw material. And (ii) a resin composition (A) or a polyolefin resin (B) in which the polyolefin resin (B) or the resin composition (A) is produced by an injection molding method and integrated. A part is manufactured in advance as a raw material, and the obtained part is mounted in an injection mold cavity, and additional molding is performed on the inner side surface or the outer side surface of the part with a polyolefin resin (B) or a resin composition (A). “Outsert or insert molding method” to be integrated, (iii) The resin composition (A) part and the polyolefin resin (B) part are separately molded, and the two parts are hot-plate welding methods, etc. How to integrate, and the like. From the viewpoint of shape flexibility, productivity, and cost, (i) two-color molding method and (ii) outsert or insert molding method are preferable.
樹脂組成物（Ａ）からなる部品と、ポリオレフィン系樹脂（Ｂ）からなる部品との複合部品の界面の接着強度（ＡＳＴＭ Ｄ６３８に準拠して測定した値）は、１０ＭＰａ以上のものが好適である。界面の接着強度の観点から特に好ましい高密度ポリエチレン樹脂は、無水マレイン酸変性高密度ポリエチレン樹脂などの吸液量の酸変性高密度ポリエチレン樹脂である。酸変性高密度ポリエチレン樹脂であると、得られた樹脂複合部品は、燃料タンク本体を構成する高密度ポリエチレン樹脂との優れた溶着性を発揮し、安全で信頼性の高い自動車用樹脂製複合部品が得られる。 The adhesive strength (measured in accordance with ASTM D638) of the composite part between the part composed of the resin composition (A) and the part composed of the polyolefin resin (B) is preferably 10 MPa or more. . A particularly preferable high-density polyethylene resin from the viewpoint of the adhesive strength at the interface is an acid-modified high-density polyethylene resin having a liquid absorption amount such as a maleic anhydride-modified high-density polyethylene resin. If it is acid-modified high-density polyethylene resin, the resulting resin composite part exhibits excellent weldability with the high-density polyethylene resin that constitutes the fuel tank body, and is a safe and reliable resin composite part for automobiles Is obtained.
本発明に係る自動車用樹脂製複合部品は、樹脂組成物（Ａ）が上記の特殊なポリアミド重合体(A1)にタルク(A2) および繊維状フィラー(A3)を配合した樹脂組成物であるので、ＪＩＳ Ｚ０２０８に準じてカップ法で測定したガソリンバリア性が２．０ｇ・mm／ｍ２・ｄａｙ以下、さらには１．０ｇ・mm／ｍ２・ｄａｙ以下の優れた燃料および／または燃料ガスバリア性を発揮し、ポリオレフィン系樹脂（Ｂ）の部品と一体化して樹脂製複合部品とした場合でも、優れた燃料および／または燃料ガスのバリア性を発揮する。 In the resin composite part for automobiles according to the present invention, the resin composition (A) is a resin composition in which talc (A2) and fibrous filler (A3) are blended with the special polyamide polymer (A1). Excellent fuel and / or fuel gas barrier properties with a gasoline barrier property measured by the cup method in accordance with JIS Z0208 of 2.0 g · mm / m 2 · day or less, and further 1.0 g · mm / m 2 · day or less Even if it is integrated with a polyolefin resin (B) component to form a resin composite component, it exhibits excellent fuel and / or fuel gas barrier properties.
本発明に係る樹脂製複合部品、特に燃料系部品は上記のとおり、接着強度が優れかつ燃料および／または燃料ガスのバリア性に優れているので、高密度ポリエチレン樹脂から構成される燃料タンク本体と溶着され、信頼性の高い自動車用樹脂製複合成形品を得ることができる。なお、本発明において燃料系部品とは、自動車のガソリンタンクに連接されるホースコネクター、カットオフバルブ、燃料ポンプケーシング、インレットバルブなどをいう。また、本発明において自動車用樹脂製複合成形品とは、燃料タンクのような高密度ポリエチレン樹脂製の成形品本体と上記の燃料系部品とが溶着された成形品をいう。 As described above, the resin composite part according to the present invention, in particular the fuel system part, has excellent adhesive strength and excellent fuel and / or fuel gas barrier properties. A highly reliable resin composite molded product for automobiles that is welded can be obtained. In the present invention, the fuel system parts include a hose connector, a cut-off valve, a fuel pump casing, an inlet valve, and the like connected to a gasoline tank of an automobile. In the present invention, the resin composite molded article for automobiles refers to a molded article in which a molded article main body made of high-density polyethylene resin such as a fuel tank and the above fuel system parts are welded.
以下に、本発明を実施例によってより具体的に説明するが、本発明はその要旨を超えない限り、以下の記載例に限定されるものではない。なお、以下に記載の例において、原料樹脂組成物の調整、部品の製造・評価試験は、次の方法で行ったものである。 Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to the following description examples unless it exceeds the gist. In the examples described below, the adjustment of the raw material resin composition and the production / evaluation test of the parts were performed by the following methods.
［実施例１〜実施例３、比較例１〜比較例７］
（１）原料樹脂組成物の調整：
以下に記載の樹脂組成物（ａ１）〜（ａ８）を、表-１に記載の割合で秤量し、ブレンダーで混合し、得られた混合物を単軸押出機（ナカタニ社製、型式：ＶＣ−６５）を使用し、シリンダー温度を２８０℃として、溶融・混練して８種類の樹脂組成物ペレットを調整した。
[Example 1 to Example 3, Comparative Example 1 to Comparative Example 7]
(1) Preparation of raw material resin composition:
The resin compositions (a1) to (a8) described below are weighed in the proportions shown in Table 1, mixed with a blender, and the resulting mixture is a single screw extruder (manufactured by Nakatani, model: VC- 65), the cylinder temperature was set to 280 ° C., and melted and kneaded to prepare 8 types of resin composition pellets.
(1-1)樹脂組成物（ａ１）：メタキシリレンジアミン１００モル％のジアミンとアジピン酸とから得られたポリアミド樹脂（三菱ガス化学社製、商品名：Ｎ−ＭＸＤ６、数平均分子量１５０００）{(A1)に相当する}９０重量部と、ポリアミド６６（東レ社製、商品名：ＣＭ３００１−Ｎ）{上記(A4)に相当する}１０重量部とからなるポリアミド系樹脂１００重量部に対し、タルク（林化成社製、ミクロンホワイト５０００Ａ）{(A2)に相当する}４重量部、離型剤（ヘキストジャパン社製、ホスタモントＮａＶとヘキストワックスＥパウダーとを、重量比で１：１の混合物）０．２重量部、ガラス繊維（旭ファイバーグラス社製、ＣＳ０３ＪＡＦＴ２Ｈ）{(A3)に相当する}１００重量部を秤量・混合、溶融・混練してペレット化したものである。 (1-1) Resin composition (a1): Polyamide resin obtained from 100 mol% of diamine and adipic acid (product name: N-MXD6, number average molecular weight 15000) obtained from 100 mol% of metaxylylenediamine {100 parts by weight of polyamide resin consisting of 90 parts by weight corresponding to (A1) and 10 parts by weight of polyamide 66 (trade name: CM3001-N, manufactured by Toray Industries, Inc.} {corresponding to (A4) above} 4 parts by weight of talc (Hayashi Kasei Co., Ltd., micron white 5000A) {corresponding to (A2)}, mold release agent (manufactured by Hoechst Japan, Hostamont NaV and Hoechst wax E powder at a weight ratio of 1: 1 Mixture) 0.2 parts by weight and 100 parts by weight of glass fiber (Asahi Fiber Glass Co., Ltd., CS03JAFT2H) {corresponding to (A3)} are weighed, mixed, melted and kneaded to form pellets.
(1-2)樹脂組成物（ａ２）：樹脂組成物（ａ1）において、ガラス繊維の量を４３重量部に代えた以外は、同種のＮ−ＭＸＤ６、ポリアミド６６、タルク、ガラス繊維および離型剤を、それぞれ同様に秤量・混合、溶融・混練してペレット化したものである。 (1-2) Resin composition (a2): The same kind of N-MXD6, polyamide 66, talc, glass fiber and mold release except that the amount of glass fiber in resin composition (a1) was changed to 43 parts by weight In the same manner, each agent is weighed, mixed, melted and kneaded into pellets.
(1-3)樹脂組成物（ａ３）：樹脂組成物（ａ1）において、ポリアミド樹脂を、メタキシリレンジアミン７０モル％、パラキシリレンジアミン３０モル％の混合ジアミンとアジピン酸とから得られたポリアミド系樹脂（三菱ガス化学社製、商品名：Ｎ−ＭＰ６、数平均分子量１５０００）１００重量部に代え、ポリアミド６６を配合しなかった以外は、タルク、ガラス繊維および離型剤を、それぞれ同様に秤量・混合、溶融・混練してペレット化したもの。 (1-3) Resin composition (a3): In the resin composition (a1), a polyamide resin was obtained from a mixed diamine of 70% by mole of metaxylylenediamine and 30% by mole of paraxylylenediamine and adipic acid. Talc, glass fiber and release agent are the same except that polyamide 66 is not blended in place of 100 parts by weight of polyamide resin (Mitsubishi Gas Chemical Co., Ltd., trade name: N-MP6, number average molecular weight 15000). Weighed, mixed, melted and kneaded into pellets.
(1-4)樹脂組成物（ａ４）：樹脂組成物（ａ1）において、ガラス繊維の量を３０重量部に代えた以外は、同種のＮ−ＭＸＤ６、ポリアミド６６、タルク、ガラス繊維および離型剤を、それぞれ同様に秤量・混合、溶融・混練してペレット化したものである。 (1-4) Resin composition (a4): N-MXD6, polyamide 66, talc, glass fiber and mold release of the same kind except that the amount of glass fiber in resin composition (a1) was changed to 30 parts by weight In the same manner, each agent is weighed, mixed, melted and kneaded into pellets.
(1-5)樹脂組成物（ａ５）：樹脂組成物（ａ1）において、ガラス繊維の量を１８０重量部に代えた以外は、同種のＮ−ＭＸＤ６、ポリアミド６６、タルク、ガラス繊維および離型剤を、それぞれ同様に秤量・混合し、シリンダー温度を２９０℃として、溶融・混練してペレット化したものである。 (1-5) Resin composition (a5): N-MXD6, polyamide 66, talc, glass fiber and mold release of the same kind except that the amount of glass fiber in resin composition (a1) was changed to 180 parts by weight The agents were weighed and mixed in the same manner, and the temperature of the cylinder was 290 ° C., which was melted and kneaded into pellets.
(1-6)樹脂組成物（ａ６）：樹脂組成物（ａ1）において、タルクを配合しなかった以外は、Ｎ−ＭＸＤ６、ポリアミド６６、ガラス繊維および離型剤を、それぞれ同様に秤量・混合、溶融・混練してペレット化したものである。 (1-6) Resin composition (a6): N-MXD6, polyamide 66, glass fiber and release agent were similarly weighed and mixed in the resin composition (a1) except that talc was not blended. These are pelletized by melting and kneading.
(1-7)樹脂組成物（ａ７）：樹脂組成物（ａ1）において、タルクに代えてマイカ（山口雲母社製、商品名：Ｂ８２）を配合した以外は、Ｎ−ＭＸＤ６、ポリアミド６６、ガラス繊維および離型剤を、それぞれ同様に秤量・混合し、シリンダー温度を２９０℃として、溶融・混練してペレット化したものである。 (1-7) Resin composition (a7): N-MXD6, polyamide 66, glass except that mica (trade name: B82, manufactured by Yamaguchi Mica Co., Ltd.) was used instead of talc in the resin composition (a1). The fiber and the release agent were weighed and mixed in the same manner, and the cylinder temperature was set to 290 ° C., and the mixture was melted and kneaded into pellets.
(1-8)樹脂組成物（ａ８）：樹脂組成物（ａ３）において、ポリアミド樹脂をナイロン１２に代えた以外は、タルク、ガラス繊維および離型剤を、それぞれ同様に秤量・混合してペレット化したもの。 (1-8) Resin composition (a8): In the resin composition (a3), except that the polyamide resin is replaced with nylon 12, talc, glass fiber and release agent are respectively weighed and mixed in the same manner to form pellets. The one that became.
(1-9)ポリオレフィン系樹脂：酸変性高密度ポリエチレン｛三菱化学社製、商品名：Ｈ５１１、比重０．９４、融点１３３℃、ＭＦＲ０．３ｇ／１０分（１９０℃）｝｛（Ｂ）成分に相当する｝のペレットである。 (1-9) Polyolefin resin: acid-modified high-density polyethylene {Made by Mitsubishi Chemical Co., Ltd., trade name: H511, specific gravity 0.94, melting point 133 ° C., MFR 0.3 g / 10 min (190 ° C.)} {(B) component Corresponds to a pellet.
（２）部品の製造・評価試験
(2-1)成形性：酸変性高密度ポリエチレン｛（Ｂ）成分｝によって、射出成形機（ファナック社製、型式：ロボショットα―１００ｉＡ）を使用し、シリンダー温度２８０℃、金型温度８０℃とし、まずＡＳＴＭ Ｄ−６３８に準じた引張り試験用ダンベルの長軸方向に半分成形した。次に、この試験片を引張り試験金型のキャビティに装着し、引張り試験用ダンベルの長軸方向の残り半分を成形し、試験片を金型エジェクターピンによって押出す際の変形の度合を目視観察して評価した。試験片の残り半分の成形は、シリンダー温度２８０℃、金型温度１００℃、成形サイクルを４５秒とした。なお、樹脂組成物（ａ６）、（ａ７）については成形サイクルを４５秒として成形したほか、１００秒としても成形を行った。成形性の判定基準は、試験片に変形がなく実用的に使用できるものを○、変形が大きく実用的に使用が困難であるものを×とした。評価結果を、表-２に記載した。なお、試験片が成形できないもの、変形が大きく実用的に使用が困難であるものについては、以下の燃料バリア性、接着強度、および曲げ試験を行わなかった。
(2) Parts manufacturing and evaluation tests
(2-1) Moldability: Acid-modified high-density polyethylene {component (B)}, using an injection molding machine (manufactured by FANUC, model: ROBOSHOT α-100iA), cylinder temperature 280 ° C., mold temperature 80 First, half was formed in the major axis direction of a tensile test dumbbell according to ASTM D-638. Next, this test piece is installed in the cavity of the tensile test mold, the remaining half of the longitudinal axis of the dumbbell for tensile test is molded, and the degree of deformation when the test piece is extruded with the mold ejector pin is visually observed. And evaluated. The remaining half of the test piece was molded with a cylinder temperature of 280 ° C., a mold temperature of 100 ° C., and a molding cycle of 45 seconds. The resin compositions (a6) and (a7) were molded with a molding cycle of 45 seconds, and also with a molding cycle of 100 seconds. The criteria for the moldability were “good” when the test piece had no deformation and could be used practically, and “poor” when the deformation was large and practically difficult to use. The evaluation results are shown in Table-2. In addition, the following fuel barrier property, adhesive strength, and a bending test were not performed about the thing which cannot shape | mold a test piece, and a thing with a deformation | transformation that is difficult to use practically.
(2-2)燃料バリア性：樹脂組成物より試験片を製造することができた各試験片につき、ＪＩＳ Ｚ０２０８に準拠しカップ法によって測定した。この試験に使用する燃料としては、(1)トルエンとイソオクタンとを容積比１対１で混合した混合溶液（以下、これを「燃料(1)」と略称する）、(2)上の(1)の混合溶液９０容量％と、エタノール１０容量％の混合溶液（以下、これを「燃料(2)」と略称する）の二種類を使用し、試験温度は、６０℃とした。８種類の樹脂組成物より得られる部品について燃料バリア性を測定することにより、ポリオレフィン系樹脂組成物から得られる部品と一体化した複合部品としての燃料バリア性を判断することができる。測定結果を、表−２に記載した。単位はｇ・mm／ｍ２・ｄａｙであり、この値が大きいほど燃料バリア性が劣ることを意味する。 (2-2) Fuel barrier property: Each test piece for which a test piece could be produced from the resin composition was measured by the cup method according to JIS Z0208. As the fuel used in this test, (1) a mixed solution in which toluene and isooctane are mixed at a volume ratio of 1: 1 (hereinafter referred to as “fuel (1)”), (1) above (1) ) And a mixed solution of ethanol 10% by volume (hereinafter referred to as “fuel (2)”), and the test temperature was 60 ° C. By measuring the fuel barrier properties of the parts obtained from the eight types of resin compositions, the fuel barrier properties as a composite part integrated with the parts obtained from the polyolefin-based resin composition can be determined. The measurement results are shown in Table-2. The unit is g · mm / m 2 · day, and the larger the value, the worse the fuel barrier property.
(2-3)接着強度：成形性評価の際に、ＡＳＴＭ Ｄ−６３８に準拠して作成した試験片のダンベル中心部の接合界面での引張破断強度を測定し、結果を表−２に記載した。単位はＭＰaであり、この値が大きいほど接合部の強度が強いことを意味する。 (2-3) Adhesive strength: Upon evaluation of formability, the tensile fracture strength at the joint interface at the center of the dumbbell of a test piece prepared according to ASTM D-638 was measured, and the results are shown in Table-2. did. The unit is MPa, and the larger this value is, the stronger the joint is.
(2-4)曲げ試験：ＡＳＴＭ Ｄ−７９０に準拠して作成した試験片につき、曲げ強度（ＭＰａ）と曲げ弾性率（ＧＰａ）とを測定し、結果を表−２に記載した。 (2-4) Bending test: Bending strength (MPa) and bending elastic modulus (GPa) were measured for a test piece prepared according to ASTM D-790, and the results are shown in Table-2.
表-１および表-２より、次のことが明らかである。
（１）本発明の実施例の製品は、成形サイクル４５秒で製造した試験片のいずれもが、金型からエジェクターピンによって離型する際に変形がなく、射出成形法により実用的な製品を効率よく得ることができる。
（２）また、本発明の実施例の製品は、燃料バリア性に極めて優れており、強度、剛性にも優れている。
（３）これに対して、ガラス繊維の配合量が請求項１で規定するよりも少ない比較例１の製品は、強度、剛性に劣る。ガラス繊維の配合量が請求項１で規定するよりも多い比較例２では、溶融粘度が高くなりすぎて、試験片を製造することができない。
From Table-1 and Table-2, the following is clear.
(1) The product of the embodiment of the present invention is a practical product that is not deformed when any of the test pieces manufactured with a molding cycle of 45 seconds is released from the mold by the ejector pin. It can be obtained efficiently.
(2) Moreover, the product of the Example of this invention is very excellent in fuel barrier property, and is excellent also in intensity | strength and rigidity.
(3) On the other hand, the product of Comparative Example 1 in which the blending amount of the glass fiber is smaller than specified in claim 1 is inferior in strength and rigidity. In Comparative Example 2 in which the blending amount of the glass fiber is larger than that specified in claim 1, the melt viscosity becomes too high to produce a test piece.
（４）樹脂組成物（Ａ）にタルクが存在しないと、成形サイクル４５秒では十分な結晶化ができないので、金型からエジェクターピンによって離型する際の変形が大きく、実用的な製品を得るためには成形サイクルを延長しなければならず、射出成形法により実用的な製品を効率よく製造することが困難である（比較例３、比較例４参照）。
（５）樹脂組成物（Ａ）にタルクの代りにマイカを使用すると、成形サイクル４５秒では十分な結晶化ができないので、金型からエジェクターピンによって離型する際の変形が大きく、実用的な製品を得るためには成形サイクルを延長しなければならず、射出成形法により実用的な製品を効率よく製造することが困難である（比較例５、比較例６参照）。
（６）樹脂組成物（Ａ）の基体樹脂としてポリアミド１２を使用した比較例７の製品は、燃料バリア性に劣る。
(4) If talc is not present in the resin composition (A), sufficient crystallization cannot be achieved in a molding cycle of 45 seconds. Therefore, the molding cycle must be extended, and it is difficult to efficiently produce a practical product by the injection molding method (see Comparative Examples 3 and 4).
(5) If mica is used in place of talc in the resin composition (A), sufficient crystallization cannot be achieved in a molding cycle of 45 seconds. In order to obtain a product, the molding cycle must be extended, and it is difficult to efficiently produce a practical product by an injection molding method (see Comparative Examples 5 and 6).
(6) The product of Comparative Example 7 using polyamide 12 as the base resin of the resin composition (A) is inferior in fuel barrier properties.
本発明に係る自動車用樹脂製複合部品は、自動車用部品の燃料系部品に要求される強度、剛性に優れ、また燃料および／または燃料ガスのバリア性に優れ、射出成形法によって実用的な製品を効率よく製造することができる。特に、自動車用燃料タンクに付属する継手（コネクター）、インレットパイプ、キャップ、燃料ポンプケーシング、カットオフバルブなどの各種燃料系部品の素材、特に強度、剛性の要求される燃料タンク付属バルブの素材として好ましく使用できる。 The resin composite parts for automobiles according to the present invention are excellent in strength and rigidity required for fuel system parts of automobile parts, excellent in fuel and / or fuel gas barrier properties, and practical by injection molding. Can be manufactured efficiently. In particular, as a material for various fuel system parts such as joints (connectors), inlet pipes, caps, fuel pump casings, cut-off valves, etc. attached to fuel tanks for automobiles, especially for fuel tank valves that require strength and rigidity. It can be preferably used.
Claims (7)
自動車用樹脂製複合部品。 The resin composite part for automobiles according to claim 3, wherein a part made of the resin composition (A) and a part made of the polyolefin resin (B) are welded.
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