Maintenance-free slide bearing with a combined adhesive sliding layer

• US 9,803,690 B2
• Filed: 09/27/2013
• Issued: 10/31/2017
• Est. Priority Date: 09/28/2012
• Status: Active Grant

• Current Assignee: Saint-Gobain Performance Plastics Pampus GmbH (Compagnie de Saint-Gobain SA)
• Original Assignee: Saint-Gobain Performance Plastics Pampus GmbH (Compagnie de Saint-Gobain SA)
• Inventors: Ziegler, Julia, Schmitjes, Olaf, Aerts, Marc A.
• Primary Examiner(s): MCAVOY, ELLEN M
• Application Number:
  US14/040,383
• Publication Number:
  US 20140100144A1
• Time in Patent Office: 1,495 Days
• Field of Search: 508103, 508104
• CPC Class Codes: B32B 15/08 of synthetic resin
• CPC Class Codes: B32B 15/085 comprising polyolefins
• CPC Class Codes: B32B 2250/02 2 layers
• CPC Class Codes: B32B 2262/10 Inorganic fibres
• CPC Class Codes: B32B 2264/10 Inorganic particles
• CPC Class Codes: B32B 2270/00 Resin or rubber layer containing a blend of at least two different polymers
• CPC Class Codes: B32B 2307/746 Slipping, anti-blocking, low friction
• CPC Class Codes: B32B 2605/00 Vehicles
• CPC Class Codes: B32B 27/20 using fillers, pigments, thixotroping agents
• CPC Class Codes: B32B 27/285 comprising polyethers
• CPC Class Codes: B32B 27/288 comprising polyketones
• CPC Class Codes: B32B 27/322 comprising halogenated polyolefins, e.g. PTFE
• CPC Class Codes: F16C 2208/22 comprising two or more thermoplastics
• CPC Class Codes: F16C 2208/30 Fluoropolymers F16C2208/58 takes precedence
• CPC Class Codes: F16C 2208/58 Several materials as provided for in F16C2208/30 - F16C2208/54 mentioned as option
• CPC Class Codes: F16C 33/201 Composition of the plastic
• CPC Class Codes: F16C 33/208 Methods of manufacture, e.g. shaping, applying coatings

Abstract

Slide bearings and methods of producing slide bearings are disclosed. The slide bearing has a metal support and a sliding layer. No other layer is in contact with the sliding layer. The sliding layer is applied directly to the metal support. The sliding layer comprises a mixture of at least two polymers P1 and P2, wherein P1 is a fluoropolymer. P2 is a non-fluorinated thermoplastic polymer.

Claims

1. A slide bearing comprising,

a metal support;

and

a sliding layer extruded on and in direct contact with the metal support, wherein the sliding layer comprises one a fluorinated thermoplastic and one a non-fluorinated thermoplastic, wherein the fluorinated thermoplastic is comprises at least 60 wt % of the sliding layer, wherein the sliding layer comprises edges and a center region disposed between the edges, and wherein the fluorinated and non-fluorinated thermoplastics are disposed along the center region and edges wherein the fluorinated thermoplastic comprises a functionalized polymer.

2. The slide bearing according to claim 1, wherein the fluorinated thermoplastic is selected from a polytetrafluoroethylene (PTFE), a modified polytetrafluoroethylene (TFM), tetrafluoroethylene-hexafluoropropylene (FEP), a perfluoroalkoxyethylene (PFA), an ethylene-tetrafluoroethylene (ETFE), a tetrafluoro-ethylene-perfluoro(methyl vinyl ether) (MFA), an ethylene chlorotrifluoroethylene copolymer (ECTFE), a polychlorotrifluoroethylene (PCTFE), a polyvinylidene fluoride (PVDF), or any combination thereof.

3. The slide bearing according to claim 2, wherein the functionalized polymer has functional groups which are incorporated into the fluorinated thermoplastic and the functional groups are selected from

4. The slide bearing according to claim 1, wherein the at least one non-fluorinated thermoplastic is selected from a polyimide (PI), a polyamidimide (PAI), a polyphenylene sulfide (PPS), a polyphenylene sulfone (PPSO2), a liquid crystal polymer (LCP), a polyetherketone (PEK), a polyether ether ketone (PEEK), an aromatic polyester (APE), a polyethersulfone (PES), or any combination thereof.

5. The slide bearing according to claim 1, wherein the sliding layer further comprises a filler.

6. The slide bearing according to claim 5, wherein the filler is selected from silicon dioxide, aluminum oxide, a titanium dioxide, a zirconium oxide, magnesium oxide, calcium oxide, boron oxide, aluminum carbonate, magnesium carbonate, calcium carbonate, a magnesium aluminum carbonate, an aluminum silicate, a calcium silicate, a magnesium silicate, a magnesium aluminum silicate, a bentonite, a kaolin, a mica, a talc, a silicon carbide, molybdenum sulfide, a bronze, a wollastonite, barium sulfate, glass fiber, glass bead, glass flake, carbon fiber, carbon nanotube, alumina fiber, silicon carbide fiber, ceramic fiber, ceramic material, gypsum fiber, carbon, graphite, an aramid, a nylon, a woven fabric, a polyimide (PI), a polyamidimide (PAI), a polyphenylene sulfide (PPS), a polyphenylene sulfone (PPSO2), a liquid crystal polymer (LCP), a polyether ether ketone (PEEK), an aromatic polyester (Ekonol), or any combination thereof.

7. The slide bearing according to claim 5, wherein the filler is present in the sliding layer in an amount of at least about 1 vol %.

19. The slide bearing of claim 1, wherein the metal support is contacted by both the fluorinated and non-fluorinated thermoplastics.

20. The slide bearing of claim 1, wherein the sliding layer includes droplets having a primary aspect ratio of at least 2:

1 and a secondary aspect ratio of at least 1;

1.

8. A slide bearing comprising,

a metal support;

and

a sliding layer extruded on and in direct contact with the metal support, wherein the sliding layer comprises a mixture of at least two polymers, wherein the mixture comprises one continuous phase, wherein the continuous phase comprises a fluorinated thermoplastic, and at least one discontinuous phase, and wherein at least a portion of both of the at least two polymers contact the metal support.

9. The slide bearing according to claim 8, wherein the discontinuous phase comprises droplets in the continuous phase.

10. The slide bearing according to claim 9, wherein the droplets have a primary aspect ratio of at least about 2:

1.

11. The slide bearing according to claim 9, wherein at least 50 percent of the droplets have a primary dimension not greater than about 30 microns.

12. The slide bearing according to claim 8, wherein the discontinuous phase comprises polymers selected from a polyimide (PI), a polyamidimide (PAI), a polyphenylene sulfide (PPS), a polyphenylene sulfone (PPSO2), a liquid crystal polymer (LCP), a polyetherketone (PEK), a polyether ether ketone (PEEK), an aromatic polyester (APE), a polyethersulfone (PES), or any combination thereof.

13. The slide bearing according to claim 8, wherein the fluorinated thermoplastic is selected from a polytetrafluoroethylene (PTFE), a modified polytetrafluoroethylene (TFM), a tetrafluoroethylene-hexafluoropropylene (FEP), a perfluoroalkoxyethylene (PFA), an ethylene-tetrafluoroethylene (ETFE), a tetrafluoro-ethylene-perfluoro(methyl vinyl ether) (MFA), an ethylene chlorotrifluoroethylene copolymer (ECTFE), a polychlorotrifluoroethylene (PCTFE), a polyvinylidene fluoride (PVDF), or any combination thereof.

14. A method for forming a sliding layer containing polymeric droplets, the method comprising:

blending at least two polymers P1 and P2 to form a blend, wherein P1 is at least 60 wt % of the blend;

heating the blend to form a polymer emulsion; and

extruding the polymer emulsion onto a metal support to form a sliding layer such that the metal support is contacted by both polymers P1 and P2.

15. The method according to claim 14, wherein P1 is selected from a polytetrafluoroethylene (PTFE), a modified polytetrafluoroethylene (TFM), a tetrafluoroethylene-hexafluoropropylene (FEP), a perfluoroalkoxyethylene (PFA), an ethylene-tetrafluoroethylene (ETFE), a tetrafluoro-ethylene-perfluoro(methyl vinyl ether) (MFA), an ethylene chlorotrifluoroethylene copolymer (ECTFE), a polychlorotrifluoroethylene (PCTFE), a polyvinylidene fluoride (PVDF), or any combination thereof.

16. The method according to claim 14, wherein P2 is selected from a polyimide (PI), a polyamidimide (PAI), a polyphenylene sulfide (PPS), a polyphenylene sulfone (PPSO2), a liquid crystal polymer (LCP), a polyether ketone (PEK), a polyether ether ketone (PEEK), polyethersulfone (PES), an aromatic polyester (Ekonol), or any combination thereof.

17. The method according to claims claim 14, further comprising adding a filler to the blend.

18. The method of claim 14, wherein the sliding layer comprises edges and a center region disposed between the edges, and wherein the polymers P1 and P2 are both disposed along the center region and edges.