JPS601254A - Polybutylene terephthalate resin composition - Google Patents
Polybutylene terephthalate resin compositionInfo
- Publication number
- JPS601254A JPS601254A JP58107904A JP10790483A JPS601254A JP S601254 A JPS601254 A JP S601254A JP 58107904 A JP58107904 A JP 58107904A JP 10790483 A JP10790483 A JP 10790483A JP S601254 A JPS601254 A JP S601254A
- Authority
- JP
- Japan
- Prior art keywords
- polybutylene terephthalate
- sliding
- weight
- blending
- wear characteristics
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Sliding-Contact Bearings (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、摩擦、摩耗特性等の優れた摺動部材用熱可塑
性樹脂組成物に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thermoplastic resin composition for sliding members that has excellent friction and wear characteristics.
ポリブチレンテレフタレート系樹脂（以下ＰＢＴ系樹脂
と称する）は、機械的性質、耐熱性が優れており、従来
より機械、電気部品などの射出成形材料、さらに最近で
はパイプ、チューブ及びワイヤーコーティング等の押出
成形材料などにも適用されている。Polybutylene terephthalate resin (hereinafter referred to as PBT resin) has excellent mechanical properties and heat resistance, and has traditionally been used as an injection molding material for machines and electrical parts, and more recently for extrusion of pipes, tubes, wire coatings, etc. It is also applied to molding materials, etc.
しかるにＰＢＴ系樹脂はポリマー単体では摩擦、摩耗特
性が不十分で、特に中空部分に金属−が挿入されたチュ
ーブで、金属線が摺動する摺動用チューブについては、
摺動抵抗が大きく摺動時にスティックスリップ現象（摺
動振動）を起こすなどの欠点を有し必ずしも適していな
い。However, PBT-based resin as a polymer alone has insufficient friction and wear characteristics, especially for sliding tubes with metal inserted into the hollow part, on which metal wires slide.
It is not necessarily suitable because it has drawbacks such as large sliding resistance and stick-slip phenomenon (sliding vibration) during sliding.
この改良方法として種々の滑剤をＰＢＴ系樹脂に添加し
たものを摺動用チューブとする方法が知られているが、
この方法でも摩擦、摩耗特性は若干の改良効果が認めら
れる程度であり、耐スティックスリップ性に対しては不
十分である。As a method for improving this, it is known to add various lubricants to PBT resin to make sliding tubes.
Even with this method, the friction and wear characteristics are only slightly improved, and the stick-slip resistance is insufficient.
そこで、本発明者らは鋭意検討した結果、ＰＢＴ系樹脂
に対し、特定の高分子量高密度ポリエチレン粉末を配合
することにより、上記欠点を解決できることを見出し、
本発明に到達した。Therefore, as a result of intensive study, the present inventors found that the above drawbacks could be solved by blending a specific high molecular weight high density polyethylene powder into the PBT resin.
We have arrived at the present invention.
すなわち、本発明者らは、ＰＢＴ系樹脂９７〜７０重量
部に対し、メルトインデックス１０以下好ましくは５以
下さらに好ましくは２．０以下の高分子量高密度ポリエ
チレン粉末を１〜４０重１部、好ましくは３〜３０重量
部の割合配合してなるＰＢＴ系樹脂組成物を提供するも
のである。That is, the present inventors added 1 part by weight, preferably 1 part by weight, of a high molecular weight high density polyethylene powder having a melt index of 10 or less, preferably 5 or less, more preferably 2.0 or less, to 97 to 70 parts by weight of PBT resin. provides a PBT-based resin composition containing 3 to 30 parts by weight.
以下詳細に本発明に係るＰＢＴ系樹脂組成物を説明する
。The PBT resin composition according to the present invention will be explained in detail below.
本発明に用いるＰＢＴ系樹脂とは、テレフタル酸または
その誘導体と１，４−ブタンジオールを縮重合してなる
熱可塑性ポリエステルであり、イソフタル酸、アジピン
酸、セバシン酸、ドデカンジカルボン酸などの他のジカ
ルボン酸や、エチレングリコール、ネオペンチルグリコ
ール、ヘキサメチレングリコール、デカメチレングリコ
ールおよびポリエチレングリコール、ポリテトラメチレ
ングリコールなどのポリアルキレングリコール類はか、
他のジオールなどを共重合成分として３０％未満含有す
ることができる。The PBT resin used in the present invention is a thermoplastic polyester formed by condensation polymerization of terephthalic acid or its derivatives and 1,4-butanediol, and is a thermoplastic polyester formed by condensation polymerization of terephthalic acid or its derivatives and 1,4-butanediol. Dicarboxylic acids, ethylene glycol, neopentyl glycol, hexamethylene glycol, decamethylene glycol, and polyalkylene glycols such as polyethylene glycol and polytetramethylene glycol,
It may contain less than 30% of other diols as copolymer components.
これらのＰＢＴ系樹脂は、０．５％のオルトクロロフェ
ノール溶液を２５℃で測定した相対粘度が０．５〜２．
５、特に０．８〜２．０の範囲のものが好ましく使用さ
れる。これらのＰｌＳＴ系樹脂に対して、滑剤、Ｍ耗改
良剤、粉末状ないし繊維状の充填剤または強化剤、可塑
剤、難燃剤、核剤、酸化防止剤、紫外線吸収剤、熱安定
剤、顔料、染イ４、その他種々の添加剤を含有させるこ
とができる。These PBT resins have a relative viscosity of 0.5 to 2.5% when measured at 25°C in a 0.5% orthochlorophenol solution.
5, particularly those in the range of 0.8 to 2.0 are preferably used. For these PlST-based resins, lubricants, wear improvers, powdered or fibrous fillers or reinforcing agents, plasticizers, flame retardants, nucleating agents, antioxidants, ultraviolet absorbers, heat stabilizers, and pigments are added. , dye 4, and various other additives.
なお、ペースポリマーとして、このＰＢＴ系樹脂の代り
にポリエチレンテレフタレート系樹脂をベースとし、本
発明で用いる高分子量、高密度ポリエチレン粉末を配合
する方法は、摩擦摩耗特性の改良効果は不十分で、持に
摺動用チューブについては摺動抵抗が大きく、摺動時に
スティックスリップ現象（摺動振動）を起こすなどの欠
点を有し必ずしも適していない。Note that the method of blending high-molecular-weight, high-density polyethylene powder used in the present invention with a polyethylene terephthalate-based resin as a base instead of this PBT-based resin as a pace polymer does not have sufficient effect of improving friction and wear characteristics, and has a poor durability. However, sliding tubes have drawbacks such as large sliding resistance and stick-slip phenomenon (sliding vibration) during sliding, and are not necessarily suitable.
本発明で用いる高分子量、高密度ポリエチレン粉末は、
Ａ Ｓ Ｔ Ｍ試験法Ｄ ｌ ２３８ （Ｃｏｎｄｉｔ
ｉｏｎＥ）によるメルトインデックスがｌ Ｏｆ ／
ｌ Ｏｍｉｎ のものが良く、メルトインデックスが１
０ ｆ／ｌ Ｏｍ＊より大きくなると、摩擦摩耗特性の
改良が少なく、かつ配合したポリエチレンが流動縞にな
り、表層剥離現象を起こす場合もあり好ましくない。The high molecular weight, high density polyethylene powder used in the present invention is
ASTM test method D l 238 (Condit
ionE) melt index is l Of /
l Omin is best, and the melt index is 1.
If it is larger than 0 f/l Om*, the friction and wear characteristics will not be improved much, and the blended polyethylene may form fluid streaks, which may cause surface layer peeling phenomenon, which is not preferable.
なお、この添加する高密度ポリエチレン粉末はあまり粒
子が粗大であると、成形品表面外観が悪く、かつ摩擦摩
耗特性の改良効果も少なく、通常平均粒径で２００μ〃
１以下、特に好ましくは１５０μ２１１以下のものが用
いられる。Note that if the particles of the high-density polyethylene powder added are too coarse, the surface appearance of the molded product will be poor and the effect of improving friction and wear characteristics will be small, and the average particle size is usually 200μ.
1 or less, particularly preferably 150μ211 or less.
高分子量高密度ポリエチレン粉末の配合量はＰＢＴ系樹
脂１００重量部に１〜４０重量部、好ましくは３〜３０
重量部範囲とする。１重量部より少ないと、摩擦摩耗特
性の改良効果がほとんどなく、４０重量部より多いとＰ
ＢＴ系樹脂本来の機械的特性が低下し、成形品としての
実用性に欠ける。The blending amount of high molecular weight high density polyethylene powder is 1 to 40 parts by weight, preferably 3 to 30 parts by weight, per 100 parts by weight of PBT resin.
Weight part range. If it is less than 1 part by weight, there is almost no effect of improving friction and wear characteristics, and if it is more than 40 parts by weight, P
The inherent mechanical properties of the BT-based resin deteriorate, making it impractical as a molded product.
この高分子量高密度ポリエチレン粉末のＰＢＴ系樹脂へ
の配合方法としては、押出機などにより混練して再ペレ
タイズする方法が好ましいが、配合ポリエチレン粉末の
偏在が防止できる場合、たとえばベースＰＢＴ樹脂を粉
末状とする場合などにおいては、単純ブレンドであって
も使用できる。The preferred method for blending this high molecular weight high density polyethylene powder into the PBT resin is to knead it using an extruder or the like and then re-pelletize it. However, if uneven distribution of the blended polyethylene powder can be prevented, for example, the base PBT resin can be In some cases, even a simple blend can be used.
かくしてなる本発明の熱可塑性樹脂組成物を摺動部材、
特に金属と摺動するチューブや軸受等の機械要素に加工
すると摩擦摩耗特性が侵れ摺動抵抗が大巾に減少する。The thermoplastic resin composition of the present invention thus obtained can be used as a sliding member,
In particular, when processed into machine elements such as tubes and bearings that slide on metal, the frictional wear characteristics are affected and the sliding resistance is greatly reduced.
特に金属線が中空部分に滑動、摺動するいわゆるリモー
トコントロールケーブル用のチューブに加工すると摺動
時のスティックスリップ現象も発生せず、摺動用途に非
常に有効である。In particular, when a metal wire is processed into a tube for a so-called remote control cable that slides in a hollow portion, no stick-slip phenomenon occurs during sliding, making it very effective for sliding applications.
以下実施例を挙げて本発明をさらに説明する。The present invention will be further explained below with reference to Examples.
実施例 Ｉ〜４
相対粘度１．７のポリブチレン考しフタレートに、メル
トインデックス０．０５ｇ／ｌｏ属直ｉ（ＡＳＴＭ、Ｄ
Ｉ２３８法）の高分子量高密度ポリエチレン粉末（三井
石油化学工業（株）製、ハイゼックス８２００Ｂ−Ｐ）
を、５，１０，２０．３０重里％ブレンドし、通常、単
軸押出機を用い加熱温度２５０℃で押出混練し、ポリエ
チレン粉末配合ＰＢＴ樹脂チップを作成した。これによ
り得られた初詣組成物を、射出成形機により３順厚の平
滑表面角板に成形し、該成形品の対金属すべり摩擦摩耗
特性を測定した。Examples I-4 Polybutylene phthalate with a relative viscosity of 1.7 was added with a melt index of 0.05 g/lo (ASTM, D
I238 method) high molecular weight high density polyethylene powder (manufactured by Mitsui Petrochemical Industries, Ltd., HIZEX 8200B-P)
were blended in an amount of 5, 10, and 20.30%, and extrusion kneaded using a single-screw extruder at a heating temperature of 250° C. to prepare PBT resin chips containing polyethylene powder. The thus obtained New Year's visit composition was molded into a smooth surface rectangular plate having a thickness of 3 mm using an injection molding machine, and the sliding friction and wear characteristics of the molded product against metal were measured.
摩擦摩耗特性の測定は、銘木式回転摩耗試験機を用い、
摺動相手材二表面アルミナ研摩３４５Ｃ製円筒、接触荷
重： ｌ Ｏｋｇ／ｃｄ 、摺動速度：２０ ｔｎ／ｓ
ｉｎ、摺動時間＝１時間の条件で実施した。摩擦係数は
、試料ホルダーに加わる回転トルクより算出し、測定開
始時より終了時までに記録された動摩擦係数値μｄ又、
μｄｍａｘ、μｄ ｕｒｎなどにより評価した。Friction and wear characteristics were measured using a precious wood rotary wear tester.
Sliding partner material: Alumina-polished 345C cylinder on two surfaces, contact load: l Okg/cd, sliding speed: 20 tn/s
The test was carried out under the following conditions: in, sliding time = 1 hour. The friction coefficient is calculated from the rotational torque applied to the sample holder, and is the dynamic friction coefficient value μd recorded from the start to the end of the measurement.
Evaluation was made using μdmax, μdurn, etc.
摩耗特性は、摺動開始前と試験終了時との試料重量減少
量測定により評価した。Wear characteristics were evaluated by measuring the amount of weight loss of the sample before the start of sliding and at the end of the test.
スティックスリップ性の評価は、該チップを通常単軸押
出機／真空チューブサイジング装置法により加熱温度２
５０℃条件で押出成形したチューブを使用して行なった
。測定方法は、当チューブを４ｍ長に切断し、チューブ
内に３．８胃屑φのスチールワイヤーを通し、グリース
（■日本砿油ｉｉ！Ｉ！Ａ−２０）を充填した後、半径
２００朋Ｒで７２０°巻（２重巻）し、ワイヤーの一端
に２ ｋｑの荷重をかけ、他端ワイヤーから３０ｍ／ｓ
ｅ ｃの速度で引張ｊｄ動する方法とした。この摺Ｉ
！動作時におけるスティックスリップ現象の発生有無を
もって優劣塵を評価した。Stick-slip properties are evaluated by heating the chips at a temperature of 2.
The test was carried out using a tube extruded at 50°C. The measurement method is to cut this tube into a length of 4 m, pass a steel wire with a diameter of 3.8 mm into the tube, fill it with grease (■Japanese Koyu II! I! A-20), and then cut the tube into a length of 200 mm. The wire is wound 720° (double winding), a load of 2 kq is applied to one end of the wire, and the winding speed is 30 m/s from the other end of the wire.
The method was to perform tensile motion at a speed of e c. This print I
! The quality of dust was evaluated based on the presence or absence of stick-slip phenomenon during operation.
実施例 ５．６
相対粘度１．５のポリブチレンテレフタレート・デカノ
ジカルボキシレート（ＰＢＴ／Ｄ、Ｔ／Ｄモル比：９０
／’１０）またはポリエーテルエステル樹脂（東洋プロ
ダクツ（株）ハイトレル７２４６）９０重量％に対し、
実施例１で使用した高分子量高密度ポリエチレン粉末を
ｌＯ重量％配合し実施例１と同方法で成形、評価した。Example 5.6 Polybutylene terephthalate decanodicarboxylate with relative viscosity 1.5 (PBT/D, T/D molar ratio: 90
/'10) or polyether ester resin (Toyo Products Co., Ltd. Hytrel 7246) 90% by weight,
The high-molecular-weight high-density polyethylene powder used in Example 1 was blended with 10% by weight, and molded and evaluated in the same manner as in Example 1.
その結果は表１に示すとおりで、本発明の熱可塑性樹脂
組成物は、良好な摩擦摩耗特性を得ることができる。The results are shown in Table 1, and the thermoplastic resin composition of the present invention can obtain good friction and wear characteristics.
実施例 ７〜９
相対粘度１．７のポリブチレンテレフタレート９０重量
％にメルトインデックス０．３．０．０８または＜０．
０１ （ＡＳＴＭ−ＤＩ２３８法）の高分子量高密度ポ
リエチレン粉末（三井石油化学工業＠）製ハイゼツクス
、５０００−Ｐ、７０００−Ｐまたはミリオン２４．０
ＩＶｉ）をｌＯ重量％配合した熱可塑性樹脂組成物を、
実施例１と同様の方法で試作評価した。Examples 7-9 90% by weight polybutylene terephthalate with a relative viscosity of 1.7 and a melt index of 0.3, 0.08 or <0.
01 (ASTM-DI238 method) high molecular weight high-density polyethylene powder (Mitsui Petrochemical Industries @) Hi-Zex, 5000-P, 7000-P or Million 24.0
A thermoplastic resin composition containing 10% by weight of IVi),
A prototype was evaluated in the same manner as in Example 1.
その結果表１に示す通り本発明の熱可塑性樹脂組成物は
良好な摩擦摩耗特性を得ることができｔこ。As a result, as shown in Table 1, the thermoplastic resin composition of the present invention was able to obtain good friction and wear characteristics.
比較例 １〜６
相対粘度１．７のポリブチレンテレフタレートに、滑剤
としてステアリン酸カルシウム、合成ワックス（ヘキス
トジャ！＜ン社製へキストワ゛ソクスＯＰ）まｊこはシ
リコーンオイル（トーレシ１２）、四フッ化エチレン樹
脂粉末（ダイキン工業（株）製ルブロンＬ−５）を５重
量％添加配合した樹脂組成物および相対粘度１．７のポ
リブチレンテレフタレート単体を、実施例１と同様の方
法で成形、評価した。Comparative Examples 1 to 6 Polybutylene terephthalate with a relative viscosity of 1.7, calcium stearate as a lubricant, synthetic wax (Hext Waxox OP, manufactured by Hoechst Jain Co., Ltd.), silicone oil (Toreshi 12), and tetrafluoroethylene resin A resin composition containing 5% by weight of a powder (Luburon L-5 manufactured by Daikin Industries, Ltd.) and polybutylene terephthalate alone having a relative viscosity of 1.7 were molded and evaluated in the same manner as in Example 1.
その結果表１に示す通りこれらの樹脂組成物では摩擦摩
耗特性の十分なものは得られな力）つた。As shown in Table 1, these resin compositions did not provide sufficient friction and wear properties.
比較例７
相対粘度１．２のポリエチレンテレフタレート９０重量
％に、メルトインデックス０．０５ （ＡＳＴｌｖ■−
ＤＩ２３８法）の高分子量高密度ポリエチレン粉末（三
井石油化学工業（株）製ハイセツクス８２００Ｂ−Ｐ）
を１０重量％ブレンドし、通常単軸押出機を用い、加熱
温度２８０℃で押出混練し、ポリエチレン粉末配合ポリ
エチレンテレフクレート樹脂チップを作製した。これに
より得られたチップを射出成形機により加熱温度２８０
℃で３朋厚の平滑表面角板を成形した。該成形品を実施
例１と同様の評価を行なった。Comparative Example 7 90% by weight of polyethylene terephthalate with relative viscosity of 1.2 was added with melt index of 0.05 (ASTlv■-
DI238 method) high molecular weight high density polyethylene powder (Hisex 8200B-P manufactured by Mitsui Petrochemical Industries, Ltd.)
were blended in an amount of 10% by weight, and extruded and kneaded using a conventional single-screw extruder at a heating temperature of 280° C. to produce polyethylene powder-blended polyethylene terephcrate resin chips. The chips thus obtained are heated to a temperature of 280°C using an injection molding machine.
A smooth surface square plate with a thickness of 3 mm was molded at ℃. The molded product was evaluated in the same manner as in Example 1.
その結果表１に示す通ＩＪＪ擦摩耗特性の十分なものは
得られなかった。As a result, sufficient IJJ abrasion characteristics shown in Table 1 could not be obtained.
Claims (1)
ｆ１ｌに対し、メルトインデックスＩＯ以下の高分子量
高密度ポリエチレン粉末を１〜４０重量部の割合配合し
てなるポリブチレンチレフクレー１・系樹脂組成物。Polybutylene terephthalate type tMA fat 97-70 F
A polybutylene lentil reflex clay 1-based resin composition comprising 1 to 40 parts by weight of high-molecular-weight high-density polyethylene powder having a melt index of IO or less based on f1l.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58107904A JPS601254A (en) | 1983-06-17 | 1983-06-17 | Polybutylene terephthalate resin composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58107904A JPS601254A (en) | 1983-06-17 | 1983-06-17 | Polybutylene terephthalate resin composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS601254A true JPS601254A (en) | 1985-01-07 |
| JPH0577916B2 JPH0577916B2 (en) | 1993-10-27 |
Family
ID=14471010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58107904A Granted JPS601254A (en) | 1983-06-17 | 1983-06-17 | Polybutylene terephthalate resin composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS601254A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63230762A (en) * | 1987-03-19 | 1988-09-27 | Mitsuboshi Belting Ltd | Polyester resin composition |
| JPS63297455A (en) * | 1987-05-29 | 1988-12-05 | Mitsuboshi Belting Ltd | Polyester resin composition |
| JPH04118107U (en) * | 1991-03-29 | 1992-10-22 | 東燃株式会社 | strainer |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53108142A (en) * | 1977-03-03 | 1978-09-20 | Toray Ind Inc | Wear-resistant material |
-
1983
- 1983-06-17 JP JP58107904A patent/JPS601254A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53108142A (en) * | 1977-03-03 | 1978-09-20 | Toray Ind Inc | Wear-resistant material |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63230762A (en) * | 1987-03-19 | 1988-09-27 | Mitsuboshi Belting Ltd | Polyester resin composition |
| JPS63297455A (en) * | 1987-05-29 | 1988-12-05 | Mitsuboshi Belting Ltd | Polyester resin composition |
| JPH04118107U (en) * | 1991-03-29 | 1992-10-22 | 東燃株式会社 | strainer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0577916B2 (en) | 1993-10-27 |
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