JPH09132694A - Extruded article of polyacetal resin - Google Patents
Extruded article of polyacetal resinInfo
- Publication number
- JPH09132694A JPH09132694A JP7290766A JP29076695A JPH09132694A JP H09132694 A JPH09132694 A JP H09132694A JP 7290766 A JP7290766 A JP 7290766A JP 29076695 A JP29076695 A JP 29076695A JP H09132694 A JPH09132694 A JP H09132694A
- Authority
- JP
- Japan
- Prior art keywords
- polyacetal resin
- wear
- polyacetal
- friction
- resin
- 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
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、低摩擦係数、耐摩
耗、つまり摩擦、摩耗特性に優れたポリアセタール樹脂
の押出成形体に関する。そしてその成形物は、電気、電
子、機械部品、自動車部品などの広い分野で使用される
物である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyacetal resin extruded product having a low coefficient of friction and excellent wear resistance, that is, excellent friction and wear characteristics. The molded product is used in a wide range of fields such as electric, electronic, mechanical parts, and automobile parts.
【０００２】[0002]
【従来の技術】ポリアセタールは、その優れた機械強
度、耐疲労性、耐薬品性、電気特性等を有する為エンジ
ニアリング樹脂として機械部品や自動車部品、家電部品
などに幅広く使用されている。しかしながら、ポリアセ
タールの本来有する摩擦、摩耗特性のみでは潤滑部品材
としては必ずしも十分でなく、用途の制限を免れず、低
摩擦係数、耐摩耗特性への改良が必要とされている。2. Description of the Related Art Polyacetal is widely used as an engineering resin in mechanical parts, automobile parts, home electric appliance parts, etc. because of its excellent mechanical strength, fatigue resistance, chemical resistance, electric characteristics and the like. However, the inherent friction and wear characteristics of polyacetal are not always sufficient as a material for lubricating parts, and restrictions on applications are inevitable, and improvements to low friction coefficient and wear resistance characteristics are required.
【０００３】例えばポリアセタールにオレフィン系重合
体とビニル系重合体もしくはエーテル系重合体とのグラ
フト共重合体と、炭素数１２以上の脂肪酸、アルコー
ル、及び脂肪酸エステルを添加する方法（特開平２−１
３８３５７号公報）、多官能性イソシアネート化合物と
活性水素を持つ官能基を有するポリオレフィン及びポリ
エチレンを添加する方法（特開平４−１２６８５８号公
報）、ポリエチレンにエチレン性不飽和シラン化合物を
グラフト重合させたシラン変成ポリエチレンを添加する
方法（特開平５−２４７２３５号公報）などが提案され
ている。For example, a method in which a graft copolymer of an olefin polymer and a vinyl polymer or an ether polymer, a fatty acid having 12 or more carbon atoms, an alcohol, and a fatty acid ester are added to polyacetal (Japanese Patent Laid-Open No. 2-1).
38357), a method of adding a polyfunctional isocyanate compound and a polyolefin having a functional group having active hydrogen and polyethylene (JP-A-4-126858), silane obtained by graft-polymerizing an ethylenically unsaturated silane compound onto polyethylene. A method of adding modified polyethylene (JP-A-5-247235) has been proposed.
【０００４】又一方、ポリアセタールに多相インターポ
リマーを添加する方法としては、２相構造からなるアク
リル系多相インターポリマーをポリアセタールに添加す
る方法（特開昭５９−１３６３４３号公報）またポリア
セタールに多相インターポリマーとエステル化合物を添
加することで金属部品との潤滑性が改良される（特願平
４−１０１５０号公報）が提案されている。On the other hand, as a method of adding a multiphase interpolymer to polyacetal, a method of adding an acrylic multiphase interpolymer having a two-phase structure to polyacetal (Japanese Patent Laid-Open No. 59-136343) or polyacetal is often used. It has been proposed that the lubricity with metal parts is improved by adding a phase interpolymer and an ester compound (Japanese Patent Application No. 4-10150).
【０００５】押出成形品に関する物として（特開平５−
０９８０２８号公報）があるが、分子量の特定が無く、
又製品の摩擦摩耗特性についてはそれ程優れるものとは
言い難い。いずれの技術も、ある程度は改良されている
が、ポリアセタール部品材料としての摩擦、摩耗特性に
ついてはまだまだ不十分である。As an article relating to an extrusion molded article (Japanese Patent Laid-Open No.
No. 098028), but the molecular weight is not specified,
Moreover, it cannot be said that the friction and wear characteristics of the product are so excellent. Although both technologies have been improved to some extent, the friction and wear properties of polyacetal component materials are still insufficient.
【０００６】[0006]
【発明が解決しようとする課題】本発明は従来のポリア
セタールの持っている欠点を克服し、対自材及び対金属
において優れた摩擦、摩耗性を有し各潤滑部品材料とし
て適した潤滑性ポリアセタール樹脂の押出成形体を提供
するものである。DISCLOSURE OF THE INVENTION The present invention overcomes the drawbacks of conventional polyacetals and has excellent friction and wear resistance against self-materials and metals and is suitable as a material for each lubricating component. An extruded product of a resin is provided.
【０００７】[0007]
【課題を解決するための手段】すなわち本発明は、数平
均分子量が４万〜１５万のポリアセタール樹脂１００重
量部に対しジカルボン酸と脂肪族アルコールのジエステ
ル０．１〜２０重量部を添加したポリアセタール樹脂組
成物を押出成形することを特徴とするポリアセタール樹
脂の押出成形体である。That is, the present invention provides a polyacetal obtained by adding 0.1 to 20 parts by weight of a diester of a dicarboxylic acid and an aliphatic alcohol to 100 parts by weight of a polyacetal resin having a number average molecular weight of 40,000 to 150,000. It is an extruded product of a polyacetal resin, which is obtained by extruding a resin composition.
【０００８】以下本発明について詳細に説明する。本発
明でポリアセタール樹脂としては、ホルムアルデヒドの
単量体またはその３量体（トリオキサン）もしくは４量
体（テトラオキサン）等の環状オリゴマーを原料として
製造された実質的にオキシメチレン単位からなるポリア
セタール樹脂ホモポリマーおよび上記原料とエチレンオ
キサイド、プロピレンオキサイド、エピクロルヒドリ
ン、１，３−ジオキソラン、グリコールのホルマール、
ジグリコールのホルマール等の環状エーテルとから製造
された炭素数２〜８個のオキシアルキレン単位を０．１
〜２重量％含有するポリアセタール樹脂コポリマー、分
子鎖の分岐化された分岐ポリアセタールコポリマー、お
よびオキシメチレンの繰り返しユニットを５０重量％以
上含む異種成分ブロックとのブロックポリマーが挙げら
れる。また、本発明におけるポリアセタール樹脂は、必
要に応じ上記２種以上をブレンドして使用することがで
きるが、寸法安定性から好ましいポリアセタール樹脂は
ポリアセタール樹脂ホモポリマーおよびコポリマー単独
である。The present invention will be described in detail below. In the present invention, the polyacetal resin is a polyacetal resin homopolymer consisting essentially of oxymethylene units produced from a cyclic oligomer such as a formaldehyde monomer or its trimer (trioxane) or tetramer (tetraoxane). And the above raw materials and ethylene oxide, propylene oxide, epichlorohydrin, 1,3-dioxolane, formal of glycol,
An oxyalkylene unit having 2 to 8 carbon atoms produced from a cyclic ether such as formal of diglycol is used as 0.1
Examples include a polyacetal resin copolymer containing 2 to 2% by weight, a branched polyacetal copolymer having a branched molecular chain, and a block polymer with a different component block containing 50% by weight or more of a repeating unit of oxymethylene. Further, the polyacetal resin in the present invention can be used by blending two or more of the above, if necessary, but the preferable polyacetal resin from the viewpoint of dimensional stability is the polyacetal resin homopolymer and copolymer alone.
【０００９】数平均分子量が４００００以上になると一
般的に述べられている射出成形ではゲート部に起こるフ
ローマーク、充填圧力不足によるユジワ、流動性不足に
よる巣の発生、更には寸法不足を引き起こし易い。これ
らの現象は製品の破壊強度低下に結び付きエンジニアリ
ングプラスチックの用途における致命的欠陥になりかね
ない。本願発明は、押出成形にすることで、成形を可能
にしたものである。In injection molding, which is generally described as having a number average molecular weight of 40,000 or more, flow marks which occur at the gate portion, wrinkles due to insufficient filling pressure, cavities due to insufficient fluidity, and further insufficient dimensions are likely to occur. These phenomena lead to a reduction in the breaking strength of the product and may be a fatal defect in the application of engineering plastics. The present invention enables molding by extrusion molding.
【００１０】本発明のポリアセタール樹脂の数平均分子
量は、４万〜１５万であることが必要である。好ましく
は、５万〜１０万である。４万に満たない場合は、磨耗
が大きく好ましくない。１５万を超えると押出成形性が
悪くなる。ジカルボン酸と脂肪族アルコールのジエステ
ル０．１〜２０重量部であることが必要である。好まし
くは、０．５〜１０重量部である。The polyacetal resin of the present invention must have a number average molecular weight of 40,000 to 150,000. It is preferably 50,000 to 100,000. If it is less than 40,000, it is not preferable because the wear is large. If it exceeds 150,000, the extrusion moldability will deteriorate. It should be 0.1 to 20 parts by weight of diester of dicarboxylic acid and aliphatic alcohol. Preferably, it is 0.5 to 10 parts by weight.
【００１１】０．１重量部に満たない場合は、摩擦、磨
耗に十分な効果が得られず、２０重量部を超えると、押
出機への食い込み性が極端に低下し満足に加工ができな
くなり、また、成形体表面へのブリードが激しくなり、
周辺への汚染が起こる。本発明におけるジエステルとは
炭素原子が一列の鎖状につながっているか、枝分かれ構
造を持ち、飽和炭化水素でも不飽和炭化水素でもよい脂
肪族アルコール及びジカンボン酸からなるエステルであ
る。これらのうち、耐熱変色性の点から飽和炭化水素系
エステルが好ましく、更には、炭素数１２〜１６の脂肪
族アルコールからなるエステルが好ましく、また、高
温、高荷重の条件下に於ても低摩擦係数が得られること
から炭素数１４及び１５の脂肪酸のエステルが好まし
い。If the amount is less than 0.1 part by weight, sufficient effects on friction and wear cannot be obtained. If the amount is more than 20 parts by weight, the ability to bite into the extruder is extremely reduced and the processing cannot be performed satisfactorily. , Also, bleeding to the surface of the molded body becomes severe,
Contamination of the surrounding area occurs. The diester in the present invention is an ester composed of an aliphatic alcohol, which has a chain structure in which carbon atoms are connected in a row or has a branched structure, and may be a saturated hydrocarbon or an unsaturated hydrocarbon, and dicambonic acid. Of these, saturated hydrocarbon-based esters are preferable from the viewpoint of heat discoloration resistance, and further, esters composed of aliphatic alcohols having 12 to 16 carbon atoms are preferable, and also low ester groups under high temperature and high load conditions. Esters of fatty acids having 14 and 15 carbon atoms are preferable because they provide a friction coefficient.
【００１２】本発明におけるジエステルとしては、、例
えばシュウ酸、マロン酸、コハク酸、グルタル酸、アジ
ピン酸、ビメリン酸、スベリン酸、アゼライン酸、セバ
シン酸、ウンデカニン酸、ブラシリン酸、マレイン酸、
フマール酸、グルタコン酸、ラウリン酸等の酸と、例え
ばメチルアルコール、エチルアルコール、プロピルアル
コール、ｎ−ブチルアルコール、イソブチルアルコー
ル、ｔｅｒｔ−ブチルアルコール、ｎ−アミルアルコー
ル、２−ペンタノール、ｎ−ペプチルアルコール、ｎ−
オクチルアルコール、ｎ−ノニルアルコール、ラウリル
アルコール、ミリスチルアルコール、セチルアルコー
ル、ステアリルアルコール、ベヘニルアルコール等の飽
和、不飽和アルコール等からなるエステルが挙げられ
る。Examples of the diester in the present invention include oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, vimelic acid, suberic acid, azelaic acid, sebacic acid, undecanoic acid, brassic acid, maleic acid,
Acids such as fumaric acid, glutaconic acid, and lauric acid, and, for example, methyl alcohol, ethyl alcohol, propyl alcohol, n-butyl alcohol, isobutyl alcohol, tert-butyl alcohol, n-amyl alcohol, 2-pentanol, n-peptyl Alcohol, n-
Examples of the ester include saturated and unsaturated alcohols such as octyl alcohol, n-nonyl alcohol, lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, and behenyl alcohol.
【００１３】これらのジエステルは単独でも２つ以上組
み合わせて添加してもよい。これらのエステルは潤滑剤
として非常に大きな効果を示す。本発明の押出成形の例
を丸棒材及び厚板材ついて加工した方法を示す。丸棒材
は、押出機によって溶融混練された樹脂を筒状の金型内
で固化させ、ロッド（丸棒）状に加工したものである。
この場合ロッドの直径、長さには何ら制限は無いが用途
面から直径は１〜３００φの物が好ましい。ポリアセタ
ール樹脂の場合押出機のシリンダー温度は、一般的に１
８０℃〜２３０℃に保たれる。更に好ましくは１９０℃
〜２１０℃である。押出機のスクリュー形状はフルフラ
イト型の緩圧縮、急圧縮、あるいはダルメージ型、更に
は２条ピッチの単軸スクリュー、又は２軸型押出機が用
いられる。These diesters may be added alone or in combination of two or more. These esters are very effective as lubricants. A method of processing a round bar material and a thick plate material will be described as an example of extrusion molding of the present invention. The round bar material is obtained by solidifying resin melt-kneaded by an extruder in a cylindrical mold and processing it into a rod (round bar) shape.
In this case, the diameter and length of the rod are not limited, but the diameter is preferably 1 to 300φ from the viewpoint of use. In the case of polyacetal resin, the cylinder temperature of the extruder is generally 1
It is kept at 80 ° C to 230 ° C. More preferably 190 ° C
２１０210 ° C. As the screw shape of the extruder, a full flight type of slow compression, rapid compression, or dullage type, and further, a double-pitch single screw or a twin screw type extruder is used.
【００１４】筒状の金型は内面をメッキ、あるいはフッ
素樹脂加工を施し、樹脂の滑りを良くした物が一般的に
用いられる。更に丸棒のポリアセタールの充填密度を向
上させる為に丸棒が金型から容易に出てこないように、
ブレーキ装置を用いる方法が取られる。上記のロッドを
必要に応じた形状に鋸引き、穴あけ、旋盤、リーマ、シ
ェバー、フライス等の切削加工することができる。A cylindrical mold is generally used in which the inner surface is plated or treated with a fluororesin to improve the sliding property of the resin. Furthermore, in order to improve the packing density of the polyacetal of the round bar, so that the round bar does not come out easily from the mold,
The method of using a braking device is taken. The above rod can be sawed, drilled, lathed, reamed, shevered, milled, etc. to have a desired shape.
【００１５】厚板材は、厚板材は金型の形状が板状の物
である他は上記の丸棒材と同様に得られる。つまり押出
機によって溶融された樹脂を板状の金型内で固化させ、
板状に加工した物である。この場合の巾、長さ、及び厚
さには何ら制限は無いが用途面から厚みは１〜５００ｍ
ｍｔの物が好ましい。これらの成形加工品はそのまま使
用しても、切削して使用しても構わない。The thick plate material can be obtained in the same manner as the above-mentioned round bar material except that the shape of the die is a plate. That is, the resin melted by the extruder is solidified in the plate-shaped mold,
It is a plate-shaped product. In this case, there is no limitation on the width, length, and thickness, but the thickness is 1 to 500 m from the application side.
mt is preferred. These molded products may be used as they are or may be cut and used.
【００１６】[0016]
【発明の実施の形態】数平均分子量は、ＧＰＣ（ゲルパ
ーミエイションクロマトグラフィー）法で測定する。条
件は、（カラム：ＧＰＣ ＨＦＩＰ ８０Ｍ×２本、溶
媒：ヘキサフルオロイソプロパノール、温度：４０℃、
検出器：ＳＨＯＤＥＸ；Ｒ（レンジ）１）で、数平均分
子量はアクリル樹脂の分子量を基準に示す。BEST MODE FOR CARRYING OUT THE INVENTION The number average molecular weight is measured by GPC (gel permeation chromatography) method. The conditions are (column: GPC HFIP 80M × 2, solvent: hexafluoroisopropanol, temperature: 40 ° C.,
Detector: SHODEX; R (range) 1), and the number average molecular weight is shown based on the molecular weight of the acrylic resin.
【００１７】摩擦摩耗試験機は、点接触型往復動摩擦摩
耗特性を往復動摩擦摩耗試験機（東洋精密製ＡＦＴ−１
５ＭＳ型、荷重２ｋｇ、線速度３０／ｍｍ、往復距離２
０ｍｍ、環境温度２３℃、で往復回数３００００回）で
測定した。摩擦摩耗評価サンプルには、ピンとプレート
があり、ピンの形状は５φ、先端Ｒ＝２．５、プレート
の形状は７０ｍｍ×５０ｍｍ×３ｍｍの平板状である。The friction and wear tester uses a point contact type reciprocating friction and wear characteristic as a reciprocating friction and wear tester (AFT-1 manufactured by Toyo Seimitsu Co., Ltd.).
5MS type, load 2 kg, linear velocity 30 / mm, reciprocating distance 2
The measurement was performed at 0 mm and an environmental temperature of 23 ° C. at a reciprocating frequency of 30,000 times. The friction and wear evaluation sample has a pin and a plate, the pin shape is 5φ, the tip R = 2.5, and the plate shape is a flat plate shape of 70 mm × 50 mm × 3 mm.
【００１８】測定は温度２３℃、湿度５０％の雰囲気で
２４ｈｒ放置後行った。往復回数が３００００回後にお
ける成形プレートの最大摩耗深さを表面粗さ計（株式会
社東京精密サーフコム５７０−Ａ−３Ｄ）で測定した。
摩耗深さの値が小さいほど摩耗特性が優れる。また摩耗
特性については往復回数が３００００回後における小平
板の最大摩耗深さを表面粗さ計（株式会社東京精密サー
フコム５７０−Ａ−３Ｄ）で測定し、往復動摩耗量の値
とした。摩耗深さの値が小さいほど摩耗特性が優れる。
それぞれ測定値の次元は摩擦係数は絶対値のみであり、
摩耗量は深さ方向の長さをμｍで表す。The measurement was carried out after leaving for 24 hours in an atmosphere of a temperature of 23 ° C. and a humidity of 50%. The maximum wear depth of the molded plate after the number of reciprocations of 30,000 was measured with a surface roughness meter (Tokyo Seimitsu Surfcom 570-A-3D).
The smaller the wear depth value, the better the wear characteristics. Regarding the wear characteristics, the maximum wear depth of the small flat plate after the number of reciprocations of 30,000 was measured with a surface roughness meter (Tokyo Seimitsu Surfcom 570-A-3D), and the value was used as the amount of reciprocating motion wear. The smaller the wear depth value, the better the wear characteristics.
The dimension of each measured value is only the absolute value of the friction coefficient,
The amount of wear represents the length in the depth direction in μm.
【００１９】[0019]
【実施例１〜４及び比較例１〜４】数平均分子量４０，
０００、７５，０００、１００，０００及び１５０，０
００のポリアセタール樹脂にアジピン酸とラウリルアル
コールからなるジエステルを、ポリアセタール樹脂に対
し、１．７５重量部添加したものについて押出成形によ
って５５φの丸棒を作り、切削加工によって厚み３ｍ
ｍ、長さ７０ｍｍ×５０ｍｍの小平板を得た。これらの
小平板を用い評価した。Examples 1-4 and Comparative Examples 1-4 Number average molecular weight 40,
000, 75,000, 100,000 and 150,000
A 00-polyacetal resin with a diester of adipic acid and lauryl alcohol added to the polyacetal resin in an amount of 1.75 parts by weight was used to make a 55φ round bar by extrusion molding, and a thickness of 3 m was obtained by cutting.
A small flat plate having a length of 70 mm and a length of 70 mm was obtained. Evaluation was performed using these small flat plates.
【００２０】押出条件は、３０ｍｍの単軸スクリュウを
用いたＬ／Ｄ＝２５のフルフライト形押出機で、シリン
ダー温度を１８０〜２３０℃の範囲に設定し、内径５５
ｍｍの水ジャケット型の金型を用いて、樹脂圧力＝３０
ｋｇ／ｃｍ2 に保ち、一時間に６００ｍｍの加工速度で
行った。ジエステルをポリアセタールに添加する操作
は、ポリアセタールの着色やガラスファイバー等の充填
材を混ぜる時と同様、単軸又は２軸の押出機で行った。The extrusion conditions are a full flight type extruder with L / D = 25 using a single screw of 30 mm, the cylinder temperature is set in the range of 180 to 230 ° C., and the inner diameter is 55.
mm water jacket mold, resin pressure = 30
It was maintained at kg / cm 2, and the processing speed was 600 mm per hour. The operation of adding the diester to the polyacetal was performed with a single-screw or twin-screw extruder, as in the case of coloring the polyacetal and mixing the filler such as glass fiber.
【００２１】表１に示すように数平均分子量４万〜１５
万のものについては摩擦特性が著しく優れ、又丸棒の加
工状態も何ら問題無い事が判る。表２には数平均分子量
３．５万のものと１７．５万のポリアセタール樹脂を用
いて実施例１〜４と同じ条件で丸棒を加工し、摩擦特性
を評価した。摩耗量が非常に多く、また、丸棒の加工が
できなかった。又、射出成形法のものについても評価し
たが、摩耗量が非常に多く、また、加工ができない結果
であった。As shown in Table 1, the number average molecular weight is 40,000 to 15
It can be seen that, in the case of 100,000, the friction characteristics are remarkably excellent, and there is no problem in the processing state of the round bar. In Table 2, a round bar was processed under the same conditions as in Examples 1 to 4 using polyacetal resins having a number average molecular weight of 35,000 and 175,000, and the friction characteristics were evaluated. The amount of wear was very large, and the round bar could not be processed. In addition, the injection molding method was also evaluated, but it was found that the amount of wear was very large and that it could not be processed.
【００２２】[0022]
【表１】 [Table 1]
【００２３】[0023]
【表２】 [Table 2]
【００２４】[0024]
【比較例５〜８】実施例１〜４と同様にして、ジエステ
ルの添加量と特性の相関性を評価した。結果を表３に示
す。ジエステルの添加量が０．１重量部未満では摩擦特
性が著しく悪くなり、又２０重量部を超えると押出加工
時にサージングが発生し均一な成形品が得られなかっ
た。結果は、表３に示す。摩擦摩耗特性は摩擦係数は小
さくて優れるものの、摩耗量がかなり多くなり実用的で
無いと判断する。Comparative Examples 5 to 8 In the same manner as in Examples 1 to 4, the correlation between the added amount of diester and the characteristics was evaluated. Table 3 shows the results. If the amount of the diester added is less than 0.1 parts by weight, the frictional properties will be significantly deteriorated, and if it exceeds 20 parts by weight, surging will occur during extrusion and a uniform molded product cannot be obtained. The results are shown in Table 3. Regarding friction and wear characteristics, the friction coefficient is small and excellent, but the amount of wear is considerably large and it is judged to be impractical.
【００２５】[0025]
【表３】 [Table 3]
【００２６】[0026]
【実施例５〜８】分子量については実施例１〜４と同様
にして、ジエステルの種類を変え、摩擦摩耗特性と押出
加工性について評価した。結果を表４に示す。ジエステ
ルの種類を変えても非常に良好であった。Examples 5 to 8 Regarding the molecular weight, the kind of diester was changed and the frictional wear characteristics and extrusion processability were evaluated in the same manner as in Examples 1 to 4. Table 4 shows the results. It was very good even if the kind of diester was changed.
【００２７】[0027]
【表４】 [Table 4]
【００２８】[0028]
【実施例９〜１２】実施例１〜４に用いたベースポリマ
ーを使用し、３０φ押出機によって溶融混練された樹脂
を板状の金型内で固化させ、厚板状に加工した。厚みが
５０ｍｍｔ、幅１ｍの形状品を加工し、その切削品を用
いて摩擦摩耗試験を行った。押出の条件は２１０℃のシ
リンダー温度、押出機のスクリュー形状はフルフライト
単軸、Ｌ／Ｄ＝２５を用いスクリュー回転数３０ｒｐｍ
で加工した。Examples 9 to 12 Using the base polymers used in Examples 1 to 4, the resin melt-kneaded by a 30φ extruder was solidified in a plate-shaped mold and processed into a plate. A shaped product having a thickness of 50 mmt and a width of 1 m was processed, and a friction wear test was performed using the cut product. Extrusion conditions are cylinder temperature of 210 ° C., extruder screw shape is full flight single axis, L / D = 25, and screw rotation speed is 30 rpm.
Processed with.
【００２９】結果を表５に示す。厚板の加工性及び摩擦
摩耗特性がきわめて優れている。The results are shown in Table 5. The workability and friction and wear characteristics of thick plates are extremely excellent.
【００３０】[0030]
【表５】 [Table 5]
【００３１】[0031]
【比較例９、１０】５０ｍｍｔの厚板成形を数平均分子
量３５００、１７５０００のもので作成した。結果を表
６に示す。１７５０００ものは、流動性が悪く、食い込
まないので厚板は得られなかった。又数平均分子量３５
０００のものは、摩耗量が多く決して満足のいくもので
は無かった。[Comparative Examples 9 and 10] A 50 mm thick plate was formed with a number average molecular weight of 3500 and 175000. Table 6 shows the results. No. 175,000 could not be obtained as a thick plate because it had poor fluidity and did not bite. Number average molecular weight 35
No. 000 had a large amount of wear and was never satisfactory.
【００３２】[0032]
【表６】 [Table 6]
【００３３】[0033]
【発明の効果】本発明は従来のポリアセタールの持って
いる欠点を克服し、対自材及び対金属において優れた摩
擦、摩耗性を有し各潤滑部品材料として適した潤滑性ポ
リアセタール樹脂の押出成形体か得られた。INDUSTRIAL APPLICABILITY The present invention overcomes the drawbacks of conventional polyacetals, and has excellent friction and wear resistance against its own materials and metals, and is extruded from a lubricating polyacetal resin suitable as a material for each lubricating component. I got a body.
Claims (1)
タール樹脂１００重量部に対しジカルボン酸と脂肪族ア
ルコールのジエステル０．１〜２０重量部を添加したポ
リアセタール樹脂組成物を押出成形することを特徴とす
るポリアセタール樹脂の押出成形体。1. A polyacetal resin composition comprising 100 parts by weight of a polyacetal resin having a number average molecular weight of 40,000 to 150,000 and 0.1 to 20 parts by weight of a diester of a dicarboxylic acid and an aliphatic alcohol is extruded. An extruded product of the characteristic polyacetal resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29076695A JP3547870B2 (en) | 1995-11-09 | 1995-11-09 | Extruded polyacetal resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29076695A JP3547870B2 (en) | 1995-11-09 | 1995-11-09 | Extruded polyacetal resin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09132694A true JPH09132694A (en) | 1997-05-20 |
| JP3547870B2 JP3547870B2 (en) | 2004-07-28 |
Family
ID=17760261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29076695A Expired - Lifetime JP3547870B2 (en) | 1995-11-09 | 1995-11-09 | Extruded polyacetal resin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3547870B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999043751A1 (en) * | 1998-02-24 | 1999-09-02 | Asahi Kasei Kogyo Kabushiki Kaisya | Polyoxymethylene resin composition |
-
1995
- 1995-11-09 JP JP29076695A patent/JP3547870B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999043751A1 (en) * | 1998-02-24 | 1999-09-02 | Asahi Kasei Kogyo Kabushiki Kaisya | Polyoxymethylene resin composition |
| US6391956B1 (en) | 1998-02-24 | 2002-05-21 | Asahi Kasei Kabushiki Kaisha | Polyoxymethylene resin composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3547870B2 (en) | 2004-07-28 |
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