JP2007119702A5

JP2007119702A5 -

Info

Publication number: JP2007119702A5
Application number: JP2005339117A
Authority: JP
Filing date: 2005-11-24
Publication date: 2009-01-15
Anticipated expiration: 2025-11-24

Description

すなわち、本発明は、
（１）ポリアミド樹脂（ａ）３０〜６０重量％、リサイクルポリエチレンテレフタレート（ｂ）１０〜３０重量％、およびガラス繊維（ｃ）２０〜６０重量％から構成される樹脂組成物であって、該樹脂組成物中に電子顕微鏡で観察される樹脂相分離構造において、ポリアミド樹脂（ａ）が連続相、ポリエステル樹脂（ｂ）が分散相を形成する樹脂相分離構造を有することを特徴とする車体機構部品用ポリアミド樹脂組成物、
（２）ポリアミド樹脂（ａ）がナイロン６６であることを特徴とする（１）に記載の車体機構部品用ポリアミド樹脂組成物、
（３）リサイクルポリエチレンテレフタレート（ｂ）が５０ｎｍ〜１０μｍの分散粒径で分散する樹脂相分離構造を有することを特徴とする（１）または（２）に記載の車体機構部品用ポリアミド樹脂組成物、
（４）（１）〜（３）のいずれかに記載の車体機構部品用ポリアミド樹脂組成物からなる車体機構部品、
（５）シフトレバーベース、サンバイザーシャフトまたはコントロールレバーである（４）に記載の車体機構部品、
（６）ポリアミド樹脂（ａ）３０〜６０重量％、フレーク状に粉砕したリサイクルポリエチレンテレフタレート（ｂ）１０〜３０重量％、およびガラス繊維（ｃ）２０〜６０重量％を溶融混練することを特徴とする（１）〜（３）のいずれかに記載の車体機構部品用ポリアミド樹脂組成物の製造方法、
を提供するものである。 That is, the present invention
(1) A resin composition comprising 30 to 60% by weight of polyamide resin (a), 10 to 30% by weight of recycled polyethylene terephthalate (b), and 20 to 60% by weight of glass fiber (c), the resin A vehicle body mechanism component having a resin phase separation structure in which a polyamide resin (a) forms a continuous phase and a polyester resin (b) forms a dispersed phase in a resin phase separation structure observed with an electron microscope in the composition Polyamide resin composition,
(2) The polyamide resin composition for vehicle body mechanism parts according to (1) , wherein the polyamide resin (a) is nylon 66;
(3) The polyamide resin composition for vehicle body parts according to (1) or (2) , wherein the recycled polyethylene terephthalate (b) has a resin phase separation structure in which the dispersed polyethylene terephthalate (b) is dispersed with a dispersed particle diameter of 50 nm to 10 μm.
(4) A vehicle body mechanism component comprising the polyamide resin composition for vehicle body mechanism component according to any one of (1) to (3) ,
(5) The vehicle body mechanism component according to (4) , which is a shift lever base, a sun visor shaft, or a control lever.
(6) It is characterized by melt-kneading 30-60% by weight of polyamide resin (a), 10-30% by weight of recycled polyethylene terephthalate (b) pulverized into flakes, and 20-60% by weight of glass fiber (c). A method for producing a polyamide resin composition for vehicle body mechanism parts according to any one of (1) to (3),
Is to provide.

さらに本発明で用いられるポリエステル樹脂（ｂ）として、環境保護や廃棄物量削減の観点から、リサイクルポリエチレンテレフタレートを用いる。本発明におけるリサイクルポリエチレンテレフタレートとは、繊維、フィルム、プラスチック等のポリエステル製品を製造するさまざまな行程で発生する屑や、ＰＥＴボトルなどの使用済み成形体から回収されて得られるポリエチレンテレフタレートなどをいうものである。この中でも本発明においては外来異物等の混入が少なくかつ粘度のバラツキが少ないという観点において、繊維、フィルム、プラスチック等の製造工程で発生する屑を使用することが好ましく、特にフィルム製品を製造する際に発生するポリエチレンテレフタレート屑がより好ましい。また、エクストルーダーなどで均一に溶融させる観点からフレーク状に細かくして用いることが好ましい。またリサイクルポリエチレンテレフタレートには本発明の目的、効果を損なわない範囲であれば、ダル化剤などの粒子や酸化防止剤などの安定剤、光安定剤、紫外線吸収剤、帯電防止剤、充填材、架橋剤などの添加剤が含まれていてもよい。 Further the polyester resin (b) used in the present invention, from the viewpoint of environmental protection and waste reduction, have use recycled polyethylene terephthalate. The recycled polyethylene terephthalate in the present invention refers to wastes generated in various processes for producing polyester products such as fibers, films, plastics, polyethylene terephthalate obtained by collecting from used molded articles such as PET bottles, etc. It is. Among these, in the present invention, it is preferable to use waste generated in the manufacturing process of fibers, films, plastics, etc. from the viewpoint that there is little mixing of foreign substances and viscosity variation, especially when manufacturing film products. More preferably, polyethylene terephthalate waste generated in Moreover, it is preferable to use it finely in flakes from a viewpoint of uniformly melting with an extruder or the like. In addition, recycled polyethylene terephthalate is within the range that does not impair the purpose and effect of the present invention, particles such as dulling agents and stabilizers such as antioxidants, light stabilizers, ultraviolet absorbers, antistatic agents, fillers, Additives such as a crosslinking agent may be included.

比較例１
ポリアミド樹脂（ａ）としてナイロン６６（９８重量％濃硫酸中、２５℃、０．０１ｇ／ｍｌ濃度で測定した相対溶液粘度２．７、融点２５５℃）を５６重量％と、ポリエステル樹脂（ｂ）としてポリエチレンテレフタレート（固有粘度０．６６、カルボキシル末端基量３８ｅｑ／ｔ）を１４重量％と、ガラス繊維（ｃ）（日本電気硝子（株）、Ｔ−２８９）を３０重量％用いてシリンダ温度２８０℃に設定したＴＥＸ−３０型２軸押出機（日本製鋼所）に投入し、溶融混練して熱可塑性樹脂組成物を得た。得られた樹脂組成物はペレタイズした後、８０℃で１０時間真空乾燥し、シリンダ温度２８０℃、金型温度８０℃で射出成形を行い、ＡＳＴＭ試験片を得た。特性の評価を表１に示した。本実施例の樹脂組成物を用いた成形品は強度が高く、吸水性の低いものであった。 Comparative Example 1
As the polyamide resin (a), nylon 66 (relative solution viscosity 2.7, melting point 255 ° C. measured at 25 ° C. and 0.01 g / ml concentration in 98% by weight concentrated sulfuric acid) is 56% by weight, polyester resin (b) As a cylinder temperature 280 using polyethylene terephthalate (inherent viscosity 0.66, carboxyl end group amount 38 eq / t) 14% by weight and glass fiber (c) (Nippon Electric Glass Co., Ltd., T-289) 30% by weight. It was put into a TEX-30 type twin-screw extruder (Nippon Steel Works) set at ° C. and melt-kneaded to obtain a thermoplastic resin composition. The obtained resin composition was pelletized, then vacuum dried at 80 ° C. for 10 hours, and injection molded at a cylinder temperature of 280 ° C. and a mold temperature of 80 ° C. to obtain an ASTM test piece. The evaluation of characteristics is shown in Table 1. A molded article using the resin composition of this example had high strength and low water absorption.

比較例２，３
各原料を表１の配合割合で用いる以外は、比較例１と同様にしてポリアミド樹脂組成物を得、特性の評価を行った。結果を表１に示した。 Comparative Examples 2 and 3
A polyamide resin composition was obtained in the same manner as in Comparative Example 1 except that each raw material was used in the blending ratio shown in Table 1, and the characteristics were evaluated. The results are shown in Table 1.

実施例１
ポリアミド樹脂（ａ）として比較例１で用いたナイロン６６を４２重量％と、ポリエステル樹脂（ｂ）として、廃棄物として粉砕処理されたリサイクルポリエチレンテレフタレート樹脂を１８重量％と、ガラス繊維（ｃ）を４０重量％用いる以外は比較例１と同様にして、ポリアミド樹脂組成物を得、特性の評価を行った。結果を表１に示した。 Example 1
42% by weight of nylon 66 used in Comparative Example 1 as the polyamide resin (a), 18% by weight of recycled polyethylene terephthalate resin pulverized as waste as the polyester resin (b), and glass fiber (c) A polyamide resin composition was obtained in the same manner as in Comparative Example 1 except that 40% by weight was used, and the characteristics were evaluated. The results are shown in Table 1.

比較例４
ポリアミド樹脂（ａ）として比較例１で用いたナイロン６６を７０重量％とガラス繊維（ｃ）を３０重量％用いて比較例１と同様にポリアミド樹脂組成物を得、特性を評価した。結果を表１に示した。得られた成形品は吸水による寸法変化が大きくなるものであった。 Comparative Example 4
Similarly to Comparative Example 1 Polyamide Resin (a) 70% by weight of nylon 66 used in Comparative Example 1 as a glass fiber (c) with 30 wt% to obtain a polyamide resin composition, the characteristics were evaluated. The results are shown in Table 1. The obtained molded product had a large dimensional change due to water absorption.

比較例５〜６
各原料を表１の配合割合で用いる以外は、比較例１と同様にしてポリアミド樹脂組成物を得、特性の評価を行った。結果を表１に示した。 Comparative Examples 5-6
A polyamide resin composition was obtained in the same manner as in Comparative Example 1 except that each raw material was used in the blending ratio shown in Table 1, and the characteristics were evaluated. The results are shown in Table 1.

Claims

A resin composition comprising 30 to 60% by weight of polyamide resin (a), 10 to 30% by weight of recycled polyethylene terephthalate (b), and 20 to 60% by weight of glass fiber (c), wherein the resin composition A resin phase separation structure observed with an electron microscope, wherein the polyamide resin (a) has a resin phase separation structure in which the polyamide resin (a) forms a continuous phase and the polyester resin (b) forms a dispersed phase. Composition.

The polyamide resin composition for vehicle body mechanism parts according to claim 1 , wherein the polyamide resin (a) is nylon 66.

The polyamide resin composition for vehicle body mechanism parts according to claim 1 or 2, wherein the recycled polyethylene terephthalate (b) has a resin phase separation structure in which the dispersed polyethylene terephthalate (b) is dispersed with a dispersed particle diameter of 50 nm to 10 µm.

A vehicle body mechanism component comprising the polyamide resin composition for vehicle body mechanism component according to any one of claims 1 to 3 .

The vehicle body mechanism component according to claim 4 , which is a shift lever base, a sun visor shaft, or a control lever.

The polyamide resin (a) 30 to 60% by weight, the recycled polyethylene terephthalate (b) pulverized into flakes 10 to 30% by weight, and the glass fiber (c) 20 to 60% by weight are melt-kneaded. The manufacturing method of the polyamide resin composition for vehicle body mechanism components in any one of 1-3.