JPH0324196A - Composite resin sliding member - Google Patents

Composite resin sliding member

Info

Publication number
JPH0324196A
JPH0324196A JP1157548A JP15754889A JPH0324196A JP H0324196 A JPH0324196 A JP H0324196A JP 1157548 A JP1157548 A JP 1157548A JP 15754889 A JP15754889 A JP 15754889A JP H0324196 A JPH0324196 A JP H0324196A
Authority
JP
Japan
Prior art keywords
resin
tetrafluoroethylene
sliding member
group
volume
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1157548A
Other languages
Japanese (ja)
Inventor
Tadashi Tanaka
正 田中
Hidehiko Tamura
田村 英彦
Teruo Abe
阿部 照雄
Nobumitsu Mabuchi
馬渕 延光
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daido Metal Co Ltd
Original Assignee
Daido Metal Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Daido Metal Co Ltd filed Critical Daido Metal Co Ltd
Priority to JP1157548A priority Critical patent/JPH0324196A/en
Publication of JPH0324196A publication Critical patent/JPH0324196A/en
Pending legal-status Critical Current

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Landscapes

  • Sliding-Contact Bearings (AREA)
  • Laminated Bodies (AREA)
  • Lubricants (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

PURPOSE:To improve the friction resistance, abrasion resistance and strength by providing a thermoplastic resin layer (containing a filler) on the outer periphery of a specific sliding member composition. CONSTITUTION:A composition for a sliding member is obtained by mixing a tetrafluoroethylene resin with a total of 0.3-70vol.% (hereinafter referred to as %) made up of 0.1-50% at least one resin selected from the group consisting of tetrafluoroethylene(TFE)/perfluoroalkyl vinyl ether copolymer resin, TFE/hexafluoropropylene copolymer resins, and fluoroethylene propylene ether resins, 0.1-50% at least one resin selected from the group consisting of oxybenzoyl polyesters, polyphenylene sulfides and thermosetting resins, and, if desired, 0.1-50% at least one member selected from the group consisting of metal lubricants, (complex) metal oxides, metal sulfides, meal fluorides, carbonaceous solid lubricants, fibrous materials and ceramics. This composition is molded into a desired shape and the outer periphery of the molding is coated with a thermoplastic resin (containing a filler).

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、自動車、電気機械、OA8!器、産業機械、
工作機械、一般産業機械等の摺動部材に好適な低摩擦性
、耐摩耗性、および強度にすぐれた複合樹脂摺動部材に
関する。
DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention is applicable to automobiles, electric machines, OA8! equipment, industrial machinery,
The present invention relates to a composite resin sliding member that has excellent low friction, wear resistance, and strength and is suitable for sliding members of machine tools, general industrial machinery, etc.

(従来の技術) 従来の技術としては、本出願の出願人の出願に係る発明
(特開昭61 − 266451号公報)(以下、従来
技術1という)がある。
(Prior Art) As a conventional technology, there is an invention (Japanese Unexamined Patent Publication No. 1983-266451) filed by the applicant of the present application (hereinafter referred to as "Prior Art 1").

従来技術1は摺動部材組成物に関するものであり、この
摺動部材組成物は、本願特許請求の範囲第1項(イ)ま
たは(ロ)の組成物(以下、DFA(登録商標)という
)に相当する。このDFAを単体樹脂摺動部材として使
用する場合、摩擦摩耗特性には優れているが、強度に劣
るなどの問題点があった。
Prior art 1 relates to a sliding member composition, and this sliding member composition is a composition according to claim 1 (a) or (b) of the present application (hereinafter referred to as DFA (registered trademark)). corresponds to When this DFA is used as a single resin sliding member, it has excellent friction and wear characteristics, but has problems such as poor strength.

(問題を解決するための手段) この発明は、前記従来の技術の問題点を解決した低摩擦
性、耐摩耗性及び強度をあわせもつ複合樹脂摺動部材を
提供することを目的とする。この目的を達成させるため
に、本願は次の(1)及び(2)の構造としている。す
なわち (1)下記(イ)または(口)の摺動部材用組成物を内
周層とし、熱可塑性樹脂または充填材含有熱可塑性樹脂
を外周層とした構成の複合樹脂摺動部材。
(Means for Solving the Problems) An object of the present invention is to provide a composite resin sliding member having low friction, wear resistance, and strength, which solves the problems of the conventional techniques. In order to achieve this objective, this application has the following structures (1) and (2). That is, (1) a composite resin sliding member having a structure in which the composition for a sliding member according to (a) or (x) below is used as an inner peripheral layer, and a thermoplastic resin or a filler-containing thermoplastic resin is used as an outer peripheral layer.

(イ)テトラフルオロエチレンーパーフ口オロアルキル
ビニルエーテル共重合樹脂、テトラフルオロエチレンー
へキサフルオロプロピレン共重合樹脂及びフルオロエチ
レンプロピレンエーテル樹脂よりなるA群から選ばれた
少なくとも1種の樹脂の0.1〜50容量%、オキシベ
ンゾイルポリエステル、ボリフエニレンサルファイド及
び熱硬化性樹脂よりなるB群から選ばれた少なくとも1
種の樹脂の0.1〜50容量%並びに残部が実質的にテ
トラフルオ口エチレン樹脂からなりこのテ1・ラフルオ
ロエチレン樹脂以外の各成分の合計が0.3〜70容量
%である摺動部材用組成物。
(a) 0.1 of at least one resin selected from Group A consisting of tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin, tetrafluoroethylene-hexafluoropropylene copolymer resin, and fluoroethylene propylene ether resin ~50% by volume, at least one selected from Group B consisting of oxybenzoyl polyester, polyphenylene sulfide, and thermosetting resin
A sliding member in which the seed resin is 0.1 to 50% by volume, and the remainder is substantially tetrafluoroethylene resin, and the total of each component other than the tetrafluoroethylene resin is 0.3 to 70% by volume. Composition for use.

(ロ)テトラフルオロエチレン−パーフロオロアルキル
ビニルエーテル共重合樹脂、テトラフルオロエチレンー
へキサフルオロブロビレン共重合樹脂及びフルオロエチ
レンプロピレンエーテル樹脂よりなるA群から選ばれた
少なくとも1種の樹脂の0.1〜50容量%、オキシベ
ンゾイルポリエステル、ボリフエニレンサルファイド及
び熱硬化性樹脂よりなるB群から選ばれた少なくとも1
種の樹脂の0.1〜50容量%、金属潤滑剤、金属酸化
物、複合金属酸化物、金属硫化物、金属弗化物、炭素系
固体潤滑剤、繊維材料及びセラミックスからなるC群の
少なくとも1種の0.1〜50容量%、並びに残部が実
質的にテトラフルオ口エチレン4tt脂からなるテトラ
フルオロエチレン樹脂以外の各成分の合計が0.3〜7
0容量%である摺動部材用組成物。
(b) 0.1 of at least one resin selected from Group A consisting of tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin, tetrafluoroethylene-hexafluorobrobylene copolymer resin, and fluoroethylene propylene ether resin ~50% by volume, at least one selected from Group B consisting of oxybenzoyl polyester, polyphenylene sulfide, and thermosetting resin
0.1 to 50% by volume of the seed resin, at least one member of Group C consisting of metal lubricants, metal oxides, composite metal oxides, metal sulfides, metal fluorides, carbon-based solid lubricants, fiber materials, and ceramics. The total amount of each component other than the tetrafluoroethylene resin is 0.1 to 50% by volume of seeds, and the remainder is essentially 4tt tetrafluoroethylene resin, which is 0.3 to 7% by volume.
A composition for a sliding member having a content of 0% by volume.

(2)前記内周層と外周層の両樹脂間の境界層が凹凸形
状である上記(1)記載の複合樹脂摺動部材。
(2) The composite resin sliding member according to (1) above, wherein the boundary layer between the resins of the inner peripheral layer and the outer peripheral layer has an uneven shape.

本発明の熱可塑性樹脂とは単体あるいは充填材含有AB
S樹脂、ボリブロピレン樹脂、ポリアセタール樹脂、ポ
リカーボネート樹脂、ポリエチレンフタレート樹脂、ポ
リブチレンフタレート樹脂、芳香族ポリエステル樹脂、
ボリアミド樹脂、ポリフェニレンサルファイド樹脂、ボ
リスルフオン系樹脂、ポリエーテル系樹脂等である。
The thermoplastic resin of the present invention is AB alone or containing a filler.
S resin, polypropylene resin, polyacetal resin, polycarbonate resin, polyethylene phthalate resin, polybutylene phthalate resin, aromatic polyester resin,
These include polyamide resin, polyphenylene sulfide resin, borisulfon resin, polyether resin, and the like.

充填材は、ガラス繊維やカーボン繊維等の繊維材料、炭
酸カルシウムやガラスビーズなどの無機充填材、着色剤
等をいう。
Fillers include fiber materials such as glass fibers and carbon fibers, inorganic fillers such as calcium carbonate and glass beads, colorants, and the like.

本発明で使用される内周層用摺動部材の形態としては、
フイルム、シート、チューブまたはパイプその他の任意
の形態のもので、戒形品の所要の表面を被覆可能にされ
たものを使用することができる。(そして、内周層用摺
動部材は、戒形品の形状に合わせて或形されたものでも
、通常のフイルムやシートの形態のままで使用すること
も可能である。) (実施例) 第1実施例(本発明品) 内径10mm肉厚1mm長さ10mmに予め機械加工等
で戒形加工され外周層と接する側に活性化処理された従
来技術lにかかる摺動部材(DFA(登録商標))の内
周層用円筒部材を射出戒形用金型内のコアピンに装着す
る。
The form of the inner peripheral layer sliding member used in the present invention is as follows:
Any other form of film, sheet, tube, pipe, etc. that can cover the required surface of the precept article can be used. (The sliding member for the inner peripheral layer may be shaped to match the shape of the pre-shaped article, or it may be used as it is in the form of a normal film or sheet.) (Example) First Example (Product of the Present Invention) A sliding member (DFA (registered)) according to the prior art l, which was pre-shaped by machining etc. to an inner diameter of 10 mm, wall thickness of 1 mm, and length of 10 mm, and activated on the side in contact with the outer peripheral layer. The cylindrical member for the inner circumferential layer (Trademark) is attached to the core pin in the injection mold.

次に185〜220°Cに溶融したポリアセタール(P
OM)を圧力800 kg / cm2で、金型温度8
0°Cの条件で射出或形し、内周に摺動部材用組成物の
層を有し、外周には、POMの層を有する外径15mm
内径10mm長さ1.0mmの円筒状の戒形品を得た。
Next, polyacetal (P
OM) at a pressure of 800 kg/cm2 and a mold temperature of 8
Injected or shaped at 0°C, with a layer of sliding member composition on the inner periphery and a POM layer on the outer periphery, with an outer diameter of 15 mm.
A cylindrical article with an inner diameter of 10 mm and a length of 1.0 mm was obtained.

この戒形品内周層の摩擦摩耗特性及び強度は表1に示し
、試験条件は表2に示す。
The friction and wear characteristics and strength of the inner circumferential layer of this pre-shaped article are shown in Table 1, and the test conditions are shown in Table 2.

第2実施例(本発明品) 第1実施例において内周層用円筒部材の外周用層と接す
る側に、活性化処理をする前に(活性化処理をした後で
もよい)結合強度を増加させる目的で、深さ0.3 m
m幅0.2mmの凹型溝を2本形威した。
Second Example (product of the present invention) In the first example, the bonding strength is increased before (or after the activation process) is applied to the side of the inner layer cylindrical member in contact with the outer layer. 0.3 m deep for the purpose of
Two concave grooves with a width of 0.2 mm were formed.

その後は第1実施例と同じ方法で威形品を得た。After that, a prestigious product was obtained in the same manner as in the first example.

この戒形品内周層の摩擦摩耗特性及び強度は表1に示し
、試験条件は表2に示す。
The friction and wear characteristics and strength of the inner circumferential layer of this pre-shaped article are shown in Table 1, and the test conditions are shown in Table 2.

第3実施例(本発明品) 内径10mm肉厚1mm長さ10mmに予め機械加工等
で或形加工され外周層と接する側に活性化処理された従
来技術1にかかる摺動部材(DFA(登録商標))の内
周層用円筒部材を射出戒形用金型内のコアビンに装着す
る。
Third Example (Product of the Present Invention) A sliding member (DFA (registered)) according to Prior Art 1 was pre-processed into a certain shape by machining or the like to have an inner diameter of 10 mm, a wall thickness of 1 mm, and a length of 10 mm, and the side in contact with the outer peripheral layer was activated. The cylindrical member for the inner circumferential layer (Trademark) is attached to the core bin in the injection mold.

次に230〜2456Cに溶融したグラスファイバー2
5%含有ポリブチレンフタレート樹脂(PBT)を圧力
600 kg / cm2で、金型温度70°Cの条件
で射出戒形し、内周に摺動部材用組成物の層を有し、外
周には、PBTの層を有する外径15mm内径10mm
長さ10mmの円筒状の戒形品を得た。
Next, glass fiber 2 fused to 230-2456C
Polybutylene phthalate resin (PBT) containing 5% is injected at a pressure of 600 kg/cm2 and a mold temperature of 70°C, with a layer of a composition for sliding parts on the inner periphery and a layer on the outer periphery. , outer diameter 15mm inner diameter 10mm with a layer of PBT
A cylindrical article with a length of 10 mm was obtained.

この戒形品内周層の摩擦摩耗特性及び強度は表1に示し
、試験条件は表2に示す。
The friction and wear characteristics and strength of the inner circumferential layer of this pre-shaped article are shown in Table 1, and the test conditions are shown in Table 2.

第4実施例(本発明品) 第3実施例において内周層用円筒部材の外周用層と接す
る側に、活性化処理をする前に(活性化処理をした後で
もよい)結合強度を増加させる目的で、深さ0.3 m
m lli 0.2 mmの凹型溝を2本形威した。
Fourth Example (product of the present invention) In the third example, the bonding strength is increased before (or after the activation process) is applied to the side of the cylindrical member for the inner peripheral layer that is in contact with the outer peripheral layer. 0.3 m deep for the purpose of
Two concave grooves with a diameter of 0.2 mm were formed.

その後は第3実施例と同じ方法で戒形品を得た。Thereafter, a precept was obtained in the same manner as in the third example.

この或形品内周層の摩擦摩耗特性及び強度は表1に示し
、試験条件は表2に示す。
The friction and wear characteristics and strength of the inner circumferential layer of this certain shaped article are shown in Table 1, and the test conditions are shown in Table 2.

第5実施例(比較品) 内径10mm肉厚1mm長さ10mmに予め機械加工等
で或形加工され外周層と接する側に活性化処理された1
5%グラファイト含有ポリテトラフルオロエチレンの内
周層用円筒部材を射出戊形用金型内のコアビンに装着す
る。
5th Example (comparative product) 1 which was previously machined into a certain shape with an inner diameter of 10 mm, a wall thickness of 1 mm, and a length of 10 mm, and activated on the side in contact with the outer peripheral layer.
A cylindrical member for the inner peripheral layer of polytetrafluoroethylene containing 5% graphite is attached to a core bin in an injection mold.

次に185〜220°Cに溶融したポリアセタール(P
OM)を圧力800 kg / am2で、金型温度8
0 ’Cの条件で射出或形し、内周に摺動部材用組成物
の層を有し、外周には、POMの層を有する外径15m
m内径10mm長さ10mmの円筒状の成形品を得た。
Next, polyacetal (P
OM) at a pressure of 800 kg/am2 and a mold temperature of 8
Injected or shaped at 0'C, with a layer of sliding member composition on the inner periphery and a layer of POM on the outer periphery, with an outer diameter of 15 m.
A cylindrical molded product with an inner diameter of 10 mm and a length of 10 mm was obtained.

この成形品内周層の摩擦摩耗特性及び強度は表1に示し
、試験条件は表2に示す。
The friction and wear characteristics and strength of the inner peripheral layer of this molded article are shown in Table 1, and the test conditions are shown in Table 2.

第6実施例(比較品) 従来技術1にかかる摺動部材(商標DFA)用粉末を金
型に充填し、戒形圧力500 kg / am2で圧粉
或形した後、340 〜370°Cで焼威し外径20m
m高さ50mmの丸棒を得た。その丸棒を機械加工にて
外径15mm内径10mm長さ10mmの円筒状或形品
を得た。
Sixth Example (comparative product) The powder for sliding members (trademark DFA) according to Prior Art 1 was filled into a mold, compacted at a pressure of 500 kg/am2, and then heated at 340 to 370°C. Burning outer diameter 20m
A round bar with a height of 50 mm was obtained. The round bar was machined to obtain a cylindrical product with an outer diameter of 15 mm, an inner diameter of 10 mm, and a length of 10 mm.

この戒形品の摩擦摩耗特性は表1に示し、試験条件は表
2に示す。
The friction and wear characteristics of this shaped article are shown in Table 1, and the test conditions are shown in Table 2.

表1 表2 (発明の効果) 本発明品は、以下のようなすぐれた効果を奏する。Table 1 Table 2 (Effect of the invention) The product of the present invention has the following excellent effects.

(A)  従来技術lとして説明した低摩擦性、耐摩耗
性を有する単体樹脂摺動部材を内周層とし、新たに熱可
塑性樹脂外周層を設けたことから、強度を向上させるこ
とができる。
(A) Since the single resin sliding member having low friction and wear resistance described as Prior Art 1 is used as the inner peripheral layer, and a new thermoplastic resin outer peripheral layer is provided, the strength can be improved.

(B)  本発明品は、両樹脂間に凹凸形状を備えたこ
とにより、実質上、表面層の面積が増えたことから、ア
ンカー効果により、さらに強固な結合(接着)強度が得
られている。
(B) The product of the present invention has an uneven shape between both resins, which substantially increases the area of the surface layer, resulting in stronger bonding (adhesion) strength due to the anchor effect. .

Claims (2)

【特許請求の範囲】[Claims] (1)下記(イ)または(ロ)の摺動部材用組成物を内
周層とし、熱可塑性樹脂または充填材含有熱可塑性樹脂
を外周層とした構成の複合樹脂摺動部材。 (イ)テトラフルオロエチレン−パーフロオロアルキル
ビニルエーテル共重合樹脂、テトラフルオロエチレン−
ヘキサフルオロプロピレン共重合樹脂及びフルオロエチ
レンプロピレンエーテル樹脂よりなるA群から選ばれた
少なくとも1種の樹脂の0.1〜50容量%、オキシベ
ンゾイルポリエステル、ポリフェニレンサルファイド及
び熱硬化性樹脂よりなるB群から選ばれた少なくとも1
種の樹脂の0.1〜50容量%並びに残部が実質的にテ
トラフルオロエチレン樹脂からなりこのテトラフルオロ
エチレン樹脂以外の各成分の合計が0.3〜70容量%
である摺動部材用組成物。 (ロ)テトラフルオロエチレン−パーフロオロアルキル
ビニルエーテル共重合樹脂、テトラフルオロエチレン−
ヘキサフルオロプロピレン共重合樹脂及びフルオロエチ
レンプロピレンエーテル樹脂よりなるA群から選ばれた
少なくとも1種の樹脂の0.1〜50容量%、オキシベ
ンゾイルポリエステル、ポリフェニレンサルファイド及
び熱硬化性樹脂よりなるB群から選ばれた少なくとも1
種の樹脂の0.1〜50容量%、金属潤滑剤、金属酸化
物、複合金属酸化物、金属硫化物、金属弗化物、炭素系
固体潤滑剤、繊維材料及びセラミックスからなるC群の
少なくとも1種の0.1〜50容量%、並びに残部が実
質的にテトラフルオロエチレン樹脂からなるテトラフル
オロエチレン樹脂以外の各成分の合計が0.3〜70容
量%である摺動部材用組成物。
(1) A composite resin sliding member having an inner peripheral layer made of the sliding member composition of (a) or (b) below and an outer peripheral layer made of a thermoplastic resin or a filler-containing thermoplastic resin. (a) Tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin, tetrafluoroethylene-
0.1 to 50% by volume of at least one resin selected from Group A consisting of hexafluoropropylene copolymer resin and fluoroethylene propylene ether resin; Group B consisting of oxybenzoyl polyester, polyphenylene sulfide, and thermosetting resin; At least one selected
0.1 to 50% by volume of the seed resin, and the remainder substantially consists of tetrafluoroethylene resin, and the total of each component other than this tetrafluoroethylene resin is 0.3 to 70% by volume.
A composition for a sliding member. (b) Tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer resin, tetrafluoroethylene-
0.1 to 50% by volume of at least one resin selected from Group A consisting of hexafluoropropylene copolymer resin and fluoroethylene propylene ether resin; Group B consisting of oxybenzoyl polyester, polyphenylene sulfide, and thermosetting resin; At least one selected
0.1 to 50% by volume of the seed resin, at least one member of Group C consisting of metal lubricants, metal oxides, composite metal oxides, metal sulfides, metal fluorides, carbon-based solid lubricants, fiber materials, and ceramics. A composition for a sliding member, wherein the total amount of each component other than the tetrafluoroethylene resin is 0.1 to 50% by volume, and the remainder is substantially tetrafluoroethylene resin, from 0.3 to 70% by volume.
(2)前記内周層と外周層との両樹脂間の境界層が凹凸
形状である特許請求の範囲第1項記載の複合樹脂摺動部
材。
(2) The composite resin sliding member according to claim 1, wherein the boundary layer between the resins of the inner peripheral layer and the outer peripheral layer has an uneven shape.
JP1157548A 1989-06-20 1989-06-20 Composite resin sliding member Pending JPH0324196A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1157548A JPH0324196A (en) 1989-06-20 1989-06-20 Composite resin sliding member

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1157548A JPH0324196A (en) 1989-06-20 1989-06-20 Composite resin sliding member

Publications (1)

Publication Number Publication Date
JPH0324196A true JPH0324196A (en) 1991-02-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP1157548A Pending JPH0324196A (en) 1989-06-20 1989-06-20 Composite resin sliding member

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JP (1) JPH0324196A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998050229A1 (en) * 1997-05-01 1998-11-12 Daikin Industries, Ltd. Adhesive composite material for office automation machines
KR20180117547A (en) * 2017-04-19 2018-10-29 세이코 인스트루 가부시키가이샤 Sliding bearing having a coating layer and drive module
JP2018179286A (en) * 2017-04-19 2018-11-15 セイコーインスツル株式会社 Sliding bearing with coating layer and drive module

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5397075A (en) * 1977-02-07 1978-08-24 Taiho Kogyo Co Ltd Sliding friction material
JPS61266451A (en) * 1985-05-21 1986-11-26 Daido Metal Kogyo Kk Composition for sliding member

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5397075A (en) * 1977-02-07 1978-08-24 Taiho Kogyo Co Ltd Sliding friction material
JPS61266451A (en) * 1985-05-21 1986-11-26 Daido Metal Kogyo Kk Composition for sliding member

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998050229A1 (en) * 1997-05-01 1998-11-12 Daikin Industries, Ltd. Adhesive composite material for office automation machines
US6500537B1 (en) 1997-05-01 2002-12-31 Daikin Industries, Ltd. Non-sticking composite materials for office automation equipment
KR20180117547A (en) * 2017-04-19 2018-10-29 세이코 인스트루 가부시키가이샤 Sliding bearing having a coating layer and drive module
JP2018179286A (en) * 2017-04-19 2018-11-15 セイコーインスツル株式会社 Sliding bearing with coating layer and drive module

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