CN210050204U - Sliding bearing - Google Patents
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- CN210050204U CN210050204U CN201822185107.4U CN201822185107U CN210050204U CN 210050204 U CN210050204 U CN 210050204U CN 201822185107 U CN201822185107 U CN 201822185107U CN 210050204 U CN210050204 U CN 210050204U
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Abstract
The utility model discloses a contain and fluoridize slide bearing of handling the tie coat, slide bearing contains the tie coat that sliding layer, supporting layer and at least one surface fluoridize and handle. The utility model discloses a slide bearing tie coat is in keeping bonding strength for fluorine element content in the tie coat is lower, thereby has reduced raw materials cost and to the adverse effect of environment.
Description
Technical Field
The utility model belongs to the technical field of slide bearing, a slide bearing who contains fluoridation and handle the tie coat is related to.
Background
A plain bearing refers to a bearing that operates under sliding friction. Commonly used sliding bearing materials are bearing alloys, wear-resistant cast iron, copper-based and aluminum-based alloys, powder metallurgy materials, plastics, rubber, hardwood, carbon graphite, polytetrafluoroethylene, modified polyoxymethylene, and the like. The sliding bearing prepared from the polytetrafluoroethylene can be self-lubricated, can be lubricated by a body material under the condition of not using a lubricant, and has the advantages of no pollution, environmental protection, low energy consumption, low friction coefficient, high safety performance and the like compared with a metal sliding bearing, so that the polytetrafluoroethylene sliding bearing is widely applied. Polytetrafluoroethylene is generally used as a sliding layer of a sliding bearing to achieve good lubrication and is combined with a metal supporting layer to improve the bearing capacity of the bearing. However, the polarity of the polytetrafluoroethylene is very low, and the polytetrafluoroethylene and the metal supporting layer are effectively combined through special technology so as to meet the use requirement of the bearing.
Common methods for achieving effective bonding of polytetrafluoroethylene to a metal support layer are mentioned in patent US8931957B 2: sintering a porous copper powder layer on a metal plate as a bonding layer, then laying polytetrafluoroethylene or a mixture thereof, enabling the polytetrafluoroethylene to enter pores of the porous copper powder layer under the action of heat and pressure, and forming an integral structure with a metal supporting layer after cooling and shaping. However, the method is complex in process, and the use of copper powder also influences the economical efficiency of products. Further, a fluoropolymer based adhesive is also proposed in domestic 200780053013.3, 201280019939.1 and international PCT/EP2013/070239 for bonding a polytetrafluoroethylene sliding layer to a metal support layer. However, there are adverse environmental effects in the fluoropolymer production process and the use of fluoropolymers also affects the economics of the product.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defects in the prior art and providing a sliding bearing containing a fluoridation bonding layer. The utility model discloses a slide bearing adopts the lower ordinary thermoplastic film who does not contain fluorine element of price as the main part of tie coat to fluoridize the processing to the surface of tie coat, when keeping bonding strength, make fluorine element content in the tie coat lower, reduced material cost and to the adverse effect of environment.
To achieve the above object, the sliding bearing of the present invention comprises:
a support layer having a first surface and a second surface opposite the first surface;
a bonding layer covering the support layer, the bonding layer having a first bonding surface contacting the second surface of the support layer and a second bonding surface opposite to the first bonding surface;
a sliding layer covering the adhesive layer, the sliding layer including a first surface contacting the second adhesive surface of the adhesive layer and a second surface opposite to the first surface;
wherein the adhesive layer is a thermoplastic resin containing no fluorine element, and the adhesive layer includes at least a fluorinated layer formed by subjecting the second adhesive surface to a fluorination treatment;
the sliding layer is made of polytetrafluoroethylene.
Preferably, the adhesive layer further includes a fluorinated layer formed by subjecting the first adhesive surface to a fluorination treatment.
Preferably, the depth of the fluorination treatment layer is 0.001-50 μm.
More preferably, the depth of the fluorination treatment layer is 0.1 to 15 μm.
Preferably, the relative atomic concentration of fluorine element in the fluorination treatment layer is 1-80%, and the content of the fluorine element is obtained by adopting an X-ray photoelectron spectrometer for analysis.
More preferably, the relative atomic concentration of the fluorine element is 5 to 52%.
Preferably, the thickness of the bonding layer is 0.005-0.1 mm.
More preferably, the thickness of the bonding layer is 0.02-0.06 mm.
Preferably, the first face of the sliding layer is a surface-treated surface.
More preferably, the surface treatment comprises a chemical modification treatment, a plasma treatment, a corona treatment, a flame treatment, a laser irradiation treatment.
The utility model has the advantages of it is following:
the utility model discloses a common thermoplastic resin who does not contain fluorine element is as the main part of tie coat to the above-mentioned not fluorine element's tie coat surface certain depth within range fluoridizes and handles with fluorine element content, surface energy and the compatibility with the sliding layer that improves the tie coat surface. Therefore, on the premise of ensuring the effective combination of the sliding layer and the supporting layer, the used bonding layer is common thermoplastic resin containing a proper amount of fluorine element only in a certain depth range of the surface, and compared with the use of expensive fluorine-containing polymer as the bonding layer, the use cost is reduced; meanwhile, the low fluorine content of the bonding layer is realized, and the influence on the environment is reduced.
Drawings
Fig. 1 is an exploded sectional view of an embodiment of a sliding bearing of the present invention;
fig. 2 is an exploded sectional view of another embodiment of the sliding bearing of the present invention;
fig. 3 is a schematic view of a manufacturing method of the sliding bearing of the present invention.
Detailed Description
The present invention is described in detail with reference to the following embodiments, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are intended to be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Some specific terms and symbols of the present invention are explained below:
in the present invention, the term "thermoplastic resin" refers to a resin having the properties of softening by heating and hardening by cooling, and not causing chemical reaction, and maintaining such properties regardless of the number of times heating and cooling are repeated. In the molding process, the thermoplastic resin is softened and flowed by pressurization and heating, does not generate chemical crosslinking, can be shaped in a mold, and is cooled and shaped to prepare a product with a required shape. The molecular structure is not substantially changed in the repeated heating process, and when the temperature is too high and the time is too long, the degradation or decomposition can occur.
In the present invention, the term "melting temperature" (Tm) refers to the temperature at which the thermoplastic resin melts. That is, the temperature at which a thermoplastic resin which is solid at normal temperature is heated and melted into a liquid state (or referred to as a molten state).
In the present invention, the term "fluorination treatment" refers to a modification treatment of the surface of the base material to increase the fluorine content and the surface energy of the surface of the base material. The fluorination treatment can be carried out using methods known in the art, such as radiation grafting, plasma activation, chemical etching, electrostatic spraying, and the like. The present invention is not limited to the above method, and any method that can make the surface of the base material contain a proper amount of fluorine within a certain depth range can be used in the present invention.
In the present invention, the term "roughening treatment" refers to processing the surface of the base material to form an uneven structure on the surface, thereby improving the adhesion of the base material. Known methods of roughening may be used in the present invention including, but not limited to, sanding, sandblasting, chemical etching, and the like.
In the present invention, the term "surface roughness" refers to the small distance and the small unevenness of the peak and valley after the roughening treatment of the surface of the base material. The smaller the surface roughness, the smoother the surface. Ra is a measure of surface roughness, called the profile arithmetic mean deviation or centerline average, which is the arithmetic mean of the heights of points on the profile over the length of the measurement. The utility model provides a roughness Ra is surveyed by the surface roughness appearance.
In the present invention, the term "surface treatment" refers to treating the surface of the base material to improve the surface activity thereof, thereby improving the adhesion of the base material, etc. Known treatments that improve the surface activity of the sliding layer may be used in the present invention, including, for example, but not limited to, chemical modification treatment, plasma treatment, corona treatment, flame treatment, laser irradiation treatment, and the like.
Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.
Fig. 1 shows an exploded cross-sectional view of an embodiment of the sliding bearing of the present invention. In the present embodiment, the sliding bearing of the present invention includes a support layer 101, an adhesive layer 102, and a sliding layer 103. Wherein, the supporting layer 101 has a first surface 101a and a second surface 101b opposite to the first surface 101 a; the adhesive layer 102 covers the support layer 101, the adhesive layer 102 includes a first adhesive surface 102a in contact with the second surface 101b of the support layer 101 and a second adhesive surface 102b opposite to the first adhesive surface 102a, and the second adhesive surface 102b is fluorinated such that the adhesive layer 102 includes a fluorinated layer F on the second adhesive surface 102b side; the sliding layer 103 covers the adhesive layer 102, and the sliding layer 103 includes a first surface 103a in contact with the second adhesive surface 102b of the adhesive layer 102 and a second surface 103b opposite to the first surface 103 a. In the present embodiment, the adhesive layer 102 is mainly composed of a thermoplastic resin containing no fluorine element, and the second adhesive surface 102b in contact with the sliding layer 103 is fluorinated to form the fluorinated layer F in which the fluorine element content and the surface energy of the surface of the adhesive layer 102 in contact with the sliding layer 103 are increased, thereby improving the compatibility with the polytetrafluoroethylene sliding layer. The adhesive strength of the adhesive layer 102 to the sliding layer 103 is significantly improved as compared with an adhesive layer not subjected to fluorination treatment. Further, since only the surface of the adhesive layer is subjected to the fluorination treatment, the use cost is reduced and the adverse effect on the environment is reduced as compared with an adhesive layer formed of a fluoropolymer. Compared with the embodiment shown in fig. 2 of the present invention, since the second bonding surface 102b is only fluorinated in the present embodiment, the content of the entire fluorine element can be further reduced while maintaining the bonding strength with the sliding layer, compared to the case where both surfaces of the bonding layer are fluorinated, thereby saving the cost and reducing the environmental impact. The composition, thickness, and other parameters of each layer in this embodiment will be described in detail below.
Fig. 2 shows an exploded sectional view of another embodiment of the plain bearing of the invention. In the present embodiment, the sliding bearing of the present invention includes a support layer 101, an adhesive layer 102, and a sliding layer 103. Wherein, the supporting layer 101 has a first surface 101a and a second surface 101b opposite to the first surface 101 a; the adhesive layer 102 covers the support layer 101, the adhesive layer 102 includes a first adhesive surface 102a that is in contact with the second surface 101b of the support layer 101 and a second adhesive surface 102b that is opposite to the first adhesive surface 102a, and the first adhesive surface 102a and the second adhesive surface 102b are both fluorinated, so that the adhesive layer 102 includes a fluorinated layer F on both the first adhesive surface 102a side and the second adhesive surface 102b side; the sliding layer 103 covers the adhesive layer 102, and the sliding layer 103 includes a first surface 103a in contact with the second adhesive surface 102b of the adhesive layer 102 and a second surface 103b opposite to the first surface 103 a. In the present embodiment, the adhesive layer 102 is mainly composed of a thermoplastic resin containing no fluorine element, and both surfaces of the adhesive layer 102 are fluorinated to form a fluorinated layer F in which the fluorine element content and the surface energy of the surface of the adhesive layer 102 in contact with the sliding layer 103 are increased, thereby improving the compatibility with the polytetrafluoroethylene sliding layer. The adhesive strength of the adhesive layer 102 to the sliding layer 103 is significantly improved as compared with an adhesive layer not subjected to fluorination treatment. Further, since only the surface of the adhesive layer is subjected to the fluorination treatment, the use cost is reduced and the adverse effect on the environment is reduced as compared with an adhesive layer formed of a fluoropolymer. Compared with the embodiment shown in fig. 1 of the present invention, the embodiment performs fluorination treatment on both surfaces of the bonding layer, which facilitates simplification of the production process. The composition, thickness, and other parameters of each layer in this embodiment will be described in detail below.
Supporting layer
The support layer 101 of the present application is a metal. The metal is not particularly limited and may be selected from low carbon steel, stainless steel, aluminum, copper, or alloys thereof.
The second surface 101b of the support layer 101 may be roughened to increase the adhesion of the support layer 101 to the bonding layer 102. The method of roughening treatment is not particularly limited, and preferably, sand sanding, sand blasting, chemical etching, or the like known in the art may be used. After the second surface 101b of the support layer 101 is subjected to the roughening treatment, the surface roughness Ra is not particularly limited, and preferably, Ra =0.1 to 10 μm. More preferably, Ra = 1-5 μm. The surface roughness Ra was measured by a surface roughness meter (Mitutoyo SJ-310).
The thickness of the supporting layer 101 is not particularly limited, and may be set according to actual needs, for example, 0.1 to 2 mm.
Adhesive layer
The adhesive layer 102 of the present application is a thermoplastic resin containing no fluorine element, and the adhesive layer 102 may further contain a filler.
The fluorine-free thermoplastic resin used for the adhesive layer 102 of the present invention is not particularly limited as long as the melting temperature (Tm) thereof is not higher than 330 ℃. The thermoplastic resin may be selected from one or more of polyethylene, polypropylene, ethylene-vinyl acetate copolymer, polyurethane, polyamide, polyethylene terephthalate, polybutylene terephthalate, and polyphenylene sulfide. From the viewpoint of better adhesion, the thermoplastic resin may preferably be one or more of ethylene-vinyl acetate copolymer, polyurethane, polyamide, and polyphenylene sulfide.
The filler used in the adhesive layer 102 of the present invention may include graft modified polymers, inorganic powders, or a combination of the two. The graft modified polymer can be selected from one or more of anhydride grafted polyethylene, anhydride grafted polypropylene and acrylate grafted polypropylene. The inorganic powder can be selected from one or more of graphite, graphene, carbon nanotubes and silicon dioxide.
In a preferred embodiment of the present invention, the thermoplastic resin is contained in the adhesive layer 102 in an amount of 40 to 100% by mass. Within the above content range, not only the bonding strength of the bonding layer 102 is excellent, but also the ductility of the bonding layer film is good, which is advantageous for the subsequent bearing molding process.
The thickness of the adhesive layer 102 may be 0.005 to 0.1 mm. Preferably, the thickness of the bonding layer 102 is 0.02-0.06 mm. When the thickness of the bonding layer 102 is 0.005-0.1 mm, the bonding strength is excellent, and the cost is low.
The method for fluorinating the adhesive layer 102 is not particularly limited, and a known fluorination treatment method in the art may be used, and preferably, the following method may be used: radiation grafting, plasma activation, chemical etching, electrostatic spraying, and the like.
The depth of the fluorinated layer F of the adhesive layer 102 can be freely determined depending on the use environment of the bearing, the adhesive strength, and the likeIt is assumed that, in a preferred embodiment of the present invention, the depth of the fluorinated treatment layer F is 0.001 to 50 μm. Preferably, the depth of the fluorination treatment layer F is 0.1 to 15 μm. When the depth of the fluorination treatment layer F is 0.01-50 μm, the bonding strength of the bonding layer 102 is excellent, and the fluorination process is low in difficulty and low in cost. Similarly, the relative atomic concentration of the fluorine element in the adhesion layer 102 and the fluorinated layer F is not particularly limited as long as the compatibility between the adhesion layer and the sliding layer can be improved, and in a preferred embodiment of the present invention, the relative atomic concentration of the fluorine element in the fluorinated layer F is 1 to 80%. Preferably, the relative atomic concentration of fluorine is 5 to 52%. When the relative atomic concentration of fluorine is 1 to 80%, not only the bonding strength of the bonding layer 102 is excellent, but also the cost is low and the adverse effect on the environment is small. The utility model discloses the degree of depth and the relative atomic concentration of fluorine element of well fluoridation processing layer F adopt the Ar sculpture degree of depth profile of X ray photoelectron spectroscopy (XPS) to obtain. The used instrument, namely, ESCALAB MK II type electron spectrometer (VG, UK), uses Mg K alpha X-ray as an excitation source (Ex energy: 1253.6 ec), the power of the instrument is 12KV multiplied by 20mA, and the transmission energy of the analyzer is 20 eV. Ar etching for depth analysis, vacuum degree 3X 10
-6mbAr, accelerating voltage 2.5KV, current 40 μ a.
Sliding layer
The main component of the sliding layer 103 of the present invention is polytetrafluoroethylene, and the mass content thereof can be the experience amount in the field. In a preferred embodiment of the present invention, the polytetrafluoroethylene is contained in an amount of 20 to 100% by mass. Preferably, the mass content of the polytetrafluoroethylene is 60-90%. When the mass content of the polytetrafluoroethylene in the sliding layer 103 is 20-100%, the sliding layer 103 has a small friction coefficient, excellent wear resistance and low cost.
The sliding layer 103 of the present invention may further contain a filler. The filler is not particularly limited and may be selected from solid lubricants, wear modifiers, reinforcing agents, polymers, or mixtures thereof. The solid lubricant is not particularly limited, and may be selected from one or more of graphite, graphite fluoride, graphene, carbon nanotubes, molybdenum disulfide, and tungsten disulfide. The wear resistance modifier is not particularly limited and may be selected from one or more of copper, lead, copper sulfide, zinc sulfide, barium sulfate, iron sulfide, chromium oxide, alumina, zirconia, silicon carbide, silicon nitride, boron nitride, glass beads. The reinforcement is not particularly limited, and may be one or more selected from glass fibers, carbon fibers, aramid fibers, polyether ether ketone fibers, and polyimide fibers. The polymer is not particularly limited, and may be one or more selected from the group consisting of polyamide, polyphenylene ester, polyphenylene sulfide, polyether ether ketone, polyimide, polyamideimide, polyvinylidene fluoride, ethylene-tetrafluoroethylene copolymer, fluorinated ethylene-propylene copolymer, and tetrafluoroethylene-perfluoroalkylvinylether copolymer.
In a preferred embodiment, the first side 103a of the sliding layer 103 of the present invention is previously surface-treated to increase the adhesion of the sliding layer 103 to the adhesive layer 102. The surface treatment method is not particularly limited, and chemical modification treatment, plasma treatment, corona treatment, flame treatment, laser irradiation treatment may be used.
The thickness of the sliding layer 103 can be freely set according to practical applications, for example, the thickness is 0.01 to 10 mm. Preferably, the thickness is 0.1-1 mm. When the thickness of the sliding layer 103 is 0.01-10 mm, the sliding layer 103 has a long service life, excellent bonding strength with the bonding layer 102, and low cost.
Preparation of sliding bearing
As shown in fig. 3, the sliding bearing of the present invention is prepared by heating and pressing the support layer 101, the adhesive layer 102, and the sliding layer 103 by a hot press molding method, specifically as follows:
① at least the second bonding surface 102b of the bonding layer 102 is subjected to the fluorination treatment to form a fluorinated treatment layer F (not shown);
② disposing the first adhesive surface 102a of the adhesive layer 102 on the second surface 101b of the support layer 101, and disposing the first surface 103a of the sliding layer 103 on the second adhesive surface 102b of the fluorinated adhesive layer to form a laminated composition;
③ applying heat and pressure to the laminated composition 100;
④ the stacked composition 100 is cooled under pressure.
Thereafter, the cooled stacked composition 100 is formed into a sliding bearing using forming methods conventional in the art.
Can be according to the utility model discloses a suitable hot pressing parameter (pressure, temperature, time etc.) preparation is selected such as the bonding strength that each layer of slide bearing constitutes, thickness and needs the utility model discloses a slide bearing. And the selection of the above hot pressing parameters is not inventive for the skilled person.
The pressure for pressurization may be 0.1 to 10 MPa. Preferably, the pressurization pressure is 0.5 to 2 MPa.
The heating temperature is not less than the melting temperature of the thermoplastic resin and not more than 330 ℃. Preferably, the heating temperature is not higher than the melting temperature by 30 ℃. More preferably, the heating temperature is not higher than the melting temperature by 10 ℃.
The time for heating and pressurizing may be 5 to 600 seconds. Preferably, the heating and pressurizing time is 10-150 s. When the time of heating and pressing is 5 to 600 seconds, the bonding strength between the bonding layer and the sliding layer is excellent.
The above-described stacked composition 100 can be formed into a sliding bearing, such as roll forming, etc., using a forming method that is conventional in the art.
The above-mentioned preparation method may further include roughening the second surface 101b of the support layer 101, and the roughening method may be any method described earlier in this application.
The preparation method may further include surface treatment of the first surface 103a of the sliding layer 103 in advance, and the treatment method may be any method described earlier in this application.
Measurement of peeling Strength
The base material 100 of the produced sliding bearing was cut into a strip-shaped sample having a width of 10mm, the sliding layer 103 was peeled from the support layer 101 at a speed of 20mm/min under a peeling angle of 180 °, and the maximum peeling force was recorded by an electronic universal tester (mitsunm 5105) and divided by the sample width to obtain the peeling strength.
Examples
(example 1)
The base material of the sliding bearing was prepared in the manner described in the above example, wherein,
the support layer 101 is a low carbon steel plate having a thickness of 0.5mm, and the second surface 101b of the support layer 101 has a surface roughness Ra =2.0 μm after the roughening treatment.
The adhesive layer 102 was a polypropylene film containing 10% by mass of maleic anhydride-grafted polypropylene and had a thickness of 0.03mm, and the first adhesive surface 102a and the second adhesive surface 102b of the adhesive layer were both subjected to a fluorination treatment having a depth of 2 μm and a fluorine content of 20%.
The sliding layer 103 is a polytetrafluoroethylene film containing 5% (mass content) of graphite, and has a thickness of 0.5mm, and the first surface 103a of the sliding layer 103 is treated with sodium naphthalene.
The peel strength between the obtained sliding bearing support layer 101 and sliding layer 103 was 1.32N/mm.
(example 2)
The base material of the sliding bearing was prepared in the manner described in the above example, wherein,
the support layer 101 is a low carbon steel plate having a thickness of 0.5mm, and the second surface 101b of the support layer 101 has a surface roughness Ra =2.0 μm after the roughening treatment.
The adhesive layer 102 was a thermoplastic polyphenylene sulfide film having a thickness of 0.02mm, and the second adhesive surface 102b of the adhesive layer 102 was subjected to fluorination treatment having a depth of 2 μm and a fluorine content of 10%.
The sliding layer 103 is a polytetrafluoroethylene film containing 5 mass% of molybdenum disulfide and 20 mass% of silicon carbide, and has a thickness of 0.3mm, and the first surface 103a of the sliding layer 103 is treated with sodium naphthalene.
The peel strength between the support layer 101 and the sliding layer 103 of the obtained sliding bearing was 3.24N/mm.
(example 3)
The base material of the sliding bearing was prepared in the manner described in the above example, wherein,
the support layer 101 is a low carbon steel plate having a thickness of 0.25mm, and the second surface 101b of the support layer 101 has a surface roughness Ra =1.6 μm after the roughening treatment.
The adhesive layer 102 was a thermoplastic polyphenylene sulfide film having a thickness of 0.02mm, and the second adhesive surface 102b of the adhesive layer 102 was subjected to fluorination treatment to a depth of 5 μm and a fluorine content of 22%.
The rest is the same as in example 2. The peel strength between the support layer 101 and the sliding layer 103 of the obtained sliding bearing was 3.52N/mm.
(example 4)
The same procedure as in example 3 was repeated, except that the thickness of the adhesive layer 102 was 0.045mm, the depth of the fluorination treatment was 15 μm, and the fluorine content was 19%.
The peel strength between the support layer 101 and the sliding layer 103 of the obtained sliding bearing was 3.10N/mm.
(example 5)
The same procedure as in example 3 was repeated, except that the fluorination treatment depth of the adhesive layer 102 was 0.1 μm and the fluorine content was 5%.
The peel strength between the support layer 101 and the sliding layer 103 of the obtained sliding bearing was 2.84N/mm.
(example 6)
The same procedure as in example 1 was repeated, except that the adhesive layer 102 was a polyamide-6 thin film containing 2% graphite (mass content) and had a thickness of 0.045 mm.
The peel strength between the support layer 101 and the sliding layer 103 of the obtained sliding bearing was 2.12N/mm.
(example 7)
The same procedure as in example 1 was repeated, except that the adhesive layer 102 was a thermoplastic polyurethane film having a thickness of 0.05mm and containing 2% by mass of silica.
The peel strength between the support layer 101 and the sliding layer 103 of the obtained sliding bearing was 3.53N/mm.
(example 8)
The same as example 1 except that the fluorine content of the adhesive layer was 52%.
The peel strength between the support layer 101 and the sliding layer 103 of the resulting sliding bearing was 1.54N/mm.
Comparative example 1
The same as example 1 was repeated, except that the first adhesive surface 102a and the second adhesive surface 102b of the adhesive layer 101 were not fluorinated.
The peel strength between the support layer 101 and the sliding layer 103 of the obtained sliding bearing was 0.58N/mm.
Comparative example 2
The same as example 2 was conducted except that the first adhesive surface 102a and the second adhesive surface 102b of the adhesive layer 102 were not fluorinated.
The peel strength between the support layer 101 and the sliding layer 103 of the obtained sliding bearing was 1.07N/mm.
Comparative example 3
The same as example 2 was conducted except that the adhesive layer 102 was an ethylene-tetrafluoroethylene copolymer, had a thickness of 0.05mm and was not surface-fluorinated.
The peel strength between the support layer 101 and the sliding layer 103 of the obtained sliding bearing was 1.98N/mm.
The examples and comparative examples are shown in Table 1.
TABLE 1
As is apparent from the above examples and comparative examples, the adhesion strength between the adhesive layer containing the fluorinated layer and the sliding layer according to the present invention is significantly improved as compared with an adhesive layer not subjected to fluorination treatment, and the adhesion strength is equivalent to or superior to that of an adhesive layer composed of a fluoropolymer. The sliding bearing of the utility model uses the common thermoplastic film which only contains a proper amount of fluorine element in a certain depth range on the surface on the premise of ensuring the effective combination of the sliding layer and the supporting layer, and reduces the use cost compared with the use of the fluorine-containing polymer with high price as the bonding layer; meanwhile, the low fluorine content of the bonding layer is realized, and the influence on the environment is reduced. And simultaneously, the utility model discloses a slide bearing's preparation method is simple, can be applied to industrial production.
Claims (7)
1. A sliding bearing comprising:
a support layer having a first surface and a second surface opposite the first surface;
a bonding layer covering the support layer, the bonding layer having a first bonding surface contacting the second surface of the support layer and a second bonding surface opposite to the first bonding surface;
a sliding layer covering the adhesive layer, the sliding layer including a first surface contacting the second adhesive surface of the adhesive layer and a second surface opposite to the first surface;
the method is characterized in that:
the adhesive layer is a thermoplastic resin containing no fluorine element, and the adhesive layer at least comprises a fluorinated layer formed by performing fluorination treatment on the second adhesive surface;
the sliding layer is made of polytetrafluoroethylene.
2. A plain bearing according to claim 1, characterized in that:
the adhesive layer further comprises a fluorination treatment layer formed by performing fluorination treatment on the first adhesive surface.
3. A plain bearing according to claim 1 or 2, characterized in that:
the depth of the fluorination treatment layer is 0.001-50 μm.
4. A plain bearing according to claim 3, wherein:
the depth of the fluorination treatment layer is 0.1-15 μm.
5. A plain bearing according to claim 1 or 2, characterized in that:
the thickness of the bonding layer is 0.005-0.1 mm.
6. A plain bearing according to claim 5, characterized in that:
the thickness of the bonding layer is 0.02-0.06 mm.
7. A plain bearing according to claim 1 or 2, characterized in that:
the first surface of the sliding layer is a surface-treated surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822185107.4U CN210050204U (en) | 2018-12-25 | 2018-12-25 | Sliding bearing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822185107.4U CN210050204U (en) | 2018-12-25 | 2018-12-25 | Sliding bearing |
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| CN210050204U true CN210050204U (en) | 2020-02-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111365373A (en) * | 2018-12-25 | 2020-07-03 | 浙江中达精密部件股份有限公司 | Sliding bearing and manufacturing method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111365373A (en) * | 2018-12-25 | 2020-07-03 | 浙江中达精密部件股份有限公司 | Sliding bearing and manufacturing method thereof |
| CN111365373B (en) * | 2018-12-25 | 2024-07-12 | 浙江中达精密部件股份有限公司 | Sliding bearing and preparation method thereof |
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