Solid-form lubricant

Abstract

Disclosed in the present invention is a solid-form lubricant. The lubricant comprises an elastomer having a microporous structure, saturated lubricating grease being adsorbed in the microporous structure of the elastomer; and under the action of external force, the elastomer squeezes the lubricating grease out from the microporous structure and same wraps the outer side of the elastomer, and as the external force weakens, the lubricating grease is adsorbed into the microporous structure again. The present invention uses a polymer material adsorbing saturated lubricating grease, and the lubricating grease is stored in micropores in the polymer on the basis of the surface tension, thus achieving self-lubrication and maintenance-free effects.

Description

A solid lubricant Technical Field

[0001] The present invention relates to the field of lubrication, in particular to a lubricant in solid form. Background Art

[0002] Grease or lubricating oil is an essential working medium for the normal operation of mechanical equipment and the manufacturing and processing of materials. With the rapid development of industry, the demand for grease and lubricating oil is also increasing. Because grease or lubricating oil is liquid or viscous at room temperature, it is inevitable that there will be leakage, overflow and improper discharge and other environmental pollution during the storage, transportation and use of grease and lubricating oil. Although the acute toxicity of grease and lubricating oil to organisms is very low and there are few reports of poisoning due to contact, grease and lubricating oil that enter the environment seriously pollute land and rivers and lakes due to their poor biodegradability. In recent years, the impact of waste and leaked grease and lubricating oil on the environment has attracted widespread attention. To solve this problem, it is necessary to develop a maintenance-free, pollution-free lubrication method that can effectively prevent pollutants from entering the lubricating interior of the plastic body or entering the environment. In other words, the present invention provides a third lubrication method in the form of lubricating particles. To solve the problem that grease and lubricating oil are in a liquid state at room temperature, thereby causing leakage or pollution, the lubricating particles provided by the present invention are completely in solid form during use, which can avoid the above-mentioned problems. It should be noted that the technologies mentioned in the background technology of the present invention do not represent common knowledge. Summary of the Invention

[0003] In response to the shortcomings of the existing technology, the present invention provides a solid lubricant in the shape of lubricating particles, thereby providing a third lubrication method in addition to grease and lubricating oil. The present invention adsorbs saturated lubricating oil through a high molecular polymer material. The lubricating oil is stored in the micropores inside the polymer based on surface tension. During operation, a small amount of lubricating oil slowly moves to the surface of the material under capillary action. When the operation stops, the lubricating oil is re-adsorbed into the polymer and stored. The lubricant (lubricating particle) of the present invention has excellent heat resistance and can fully exert the effect of reducing friction and wear; it can be blended and molded and is environmentally friendly and pollution-free; it is easy to store, will not leak during use, is simple to operate, and can be mass-produced; it realizes that the product is maintenance-free during use, reducing after-sales repair costs.

[0004] To achieve the above purpose, the present invention provides the following technical solutions

[0005] A solid lubricant includes an elastomer with a microporous structure. Saturated lubricating grease is adsorbed in the microporous structure of the elastomer. Under the action of an external force, the elastomer squeezes the lubricating grease out of the microporous structure and wraps it around the outside of the elastomer to form a self-lubricating state. As the external force weakens, the lubricating grease is re-adsorbed into the microporous structure.

[0006] As a further solution of the present invention, the elastomer and the lubricating grease are integrally formed.

[0007] As a further embodiment of the present invention, the physical shape of the lubricant is regular or irregular, for example, it can be a spherical structure.

[0008] As a further solution of the present invention, the invention comprises mixing the blend, lubricating grease and a compatibilizer.

[0009] As a further solution of the present invention, it comprises the following components: polyethylene PE, ultra-high molecular weight polyethylene, polyimide, PEEK polymer, lubricating grease and compatibilizer.

[0010] As a further solution of the present invention, polyethylene PE, ultra-high molecular weight polyethylene, polyimide, PEEK polymer, lubricating grease and a compatibilizer are blended to obtain an elastomer adsorbed with lubricating grease.

[0011] As a further embodiment of the present invention, the solid elastomeric material obtained after blending is granulated to obtain a solid lubricant.

[0012] As a further solution of the present invention, polyethylene PE, ultra-high molecular weight polyethylene, polyimide, PEEK polymer, polytetrafluoroethylene, polyphenylene sulfide, lubricating grease and a compatibilizer are blended to obtain an elastomer adsorbed with lubricating grease.

[0013] As a further solution of the present invention, a physical foaming agent is also included, specifically supercritical CO2 is used as the physical foaming agent.

[0014] As a further embodiment of the present invention, 5-50 parts of polyethylene (PE), 5-50 parts of ultra-high molecular weight polyethylene, 5-50 parts of polyimide, 5-50 parts of PEEK polymer, 5-50 parts of lubricating grease, and 5-50 parts of a compatibilizer are blended to obtain an elastomer adsorbed with lubricating grease, and the resulting elastomer is then granulated to obtain a solid lubricant. More preferably, 5-50 parts of polyethylene (PE), 5-50 parts of ultra-high molecular weight polyethylene, 5-50 parts of polyimide, 5-50 parts of PEEK polymer, 5-50 parts of polytetrafluoroethylene, 5-50 parts of polyphenylene sulfide, 5-50 parts of lubricating grease, and 5-50 parts of a compatibilizer are blended to obtain an elastomer adsorbed with lubricating grease.

[0015] As a further solution of the present invention, the granulation size is 0.05-20 mm, and the lubricating grease content is 20-95%. Preferably, the granulation size is 0.2-2 mm.

[0016] The present invention has the following beneficial effects:

[0017] The solid lubricant (lubricating particles) obtained by modifying a polymer material through blending in the present invention also has good wear resistance. This method can be used to design a high-strength, wear-resistant composite material that can work efficiently in a metal-polymer unit. Lubricating grease is added to the blend so that the resulting blended polymer material adsorbs saturated lubricating oil. The lubricating oil is stored in the micropores inside the polymer based on surface tension. During operation, a small amount of the lubricating oil slowly moves to the surface of the material under capillary action. When operation stops, the lubricating oil is re-adsorbed into the polymer and stored. In some embodiments, polytetrafluoroethylene and polyphenylene sulfide are added to the blend so that the resulting polymer material also has good mechanical and thermal stability. In some embodiments, supercritical CO2 is added as a physical foaming agent to the blend so that the resulting polymer elastomer has better adsorption capacity, thereby resulting in a solid lubricant with better self-lubricating properties.

[0018] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG1 is a cross-sectional view of a solid lubricant according to the present invention. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings and related knowledge, and described clearly and completely. Obviously, the described applications are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Referring to FIG1 , a solid lubricant includes an elastomer with a microporous structure, wherein the microporous structure of the elastomer is adsorbed with saturated lubricating grease. Under the action of an external force, the elastomer squeezes the lubricating grease out of the microporous structure and wraps it around the outside of the elastomer to form a self-lubricating state, and then re-adsorbs it into the microporous structure as the external force weakens. Referring to the structure in FIG1 , the lubricating grease is adsorbed into the micropores of the elastomer, which means that the lubricating oil is stored in the micropores inside the polymer based on surface tension. During operation, a small amount of the lubricating oil slowly moves to the surface of the material under capillary action. When the operation stops, the lubricating oil is re-adsorbed into the polymer and stored. The lubricant of the present invention has good heat resistance and can fully exert its friction and wear reduction effect; it can be blended and molded and is environmentally friendly and pollution-free; it is easy to store, will not leak during use, is simple to operate, and can be mass-produced; it achieves maintenance-free product use and reduces after-sales repair costs.

[0022] In the present invention, the elastomer and the lubricating grease are integrally formed by blending the polymer material and the lubricating grease, and then the obtained blend is granulated to obtain the solid lubricant of the present invention.

[0023] In the present invention, the physical shape of the lubricant is regular or irregular, generally a regular spherical structure, and is then added to the bearing to achieve a self-lubricating effect.

[0024] In the present invention, the solid lubricant includes a blend, a lubricating grease and a compatibilizer, and the blend includes polyethylene, polypropylene, biaxially oriented polypropylene, high-density polyethylene, polyacrylonitrile, butadiene, styrene, polycarbonate, polyethersulfone, phenolic resin, polyimide, polysulfone, polyurethane, polyvinyl chloride, polyoxymethylene, polyamide, polycaprolactam, polyhexamethylene adipamide, polybutylene terephthalate, polyethylene terephthalate, epoxy resin, polymethyl methacrylate, polyphenylene oxide, polyphenylene sulfide, polystyrene, polytetrafluoroethylene, polyetheretherketone, unsaturated polyester, ultra-high molecular weight polyethylene , polyvinyl fluoride, polyetherimide, cellulose acetate, carboxymethyl cellulose, chlorinated polyethylene, ethylene propylene diene monomer rubber, expandable polystyrene, liquid crystal polymer, medium density polyethylene, low density polyethylene, linear low density polyethylene, polyarylether, polyaryletherketone, polyamide-imide, polyacrylonitrile, polyarylate, polyetherketone, thermoplastic polyurethane, thermoplastic elastomer, styrene acrylonitrile polymer, styrene butadiene copolymer, chlorinated polyvinyl chloride, polyvinylidene fluoride at least one, not limited to the above materials, that is to say, the elastomer obtained by blending to achieve lubricating particles is within the scope of protection of the present invention. In some embodiments, a microporous structured elastomer can also be obtained by cross-linking, which is also within the scope of protection of the present invention.

[0025] Further preferably, in the present invention, the solid lubricant comprises the following components: polyethylene PE, ultra-high molecular weight polyethylene, polyimide, PEEK polymer, lubricating grease and compatibilizer. Further preferably, polyethylene PE, ultra-high molecular weight polyethylene, polyimide, PEEK polymer, lubricating grease and compatibilizer are blended to obtain an elastomer adsorbed with lubricating grease. More preferably, after blending, the solid elastomer material obtained is granulated to obtain a solid lubricant. The modified blend can be used in fields with high requirements for friction and wear, impact resistance and corrosion resistance, and The modified blend has a microporous structure, and lubricating grease is adsorbed inside the microporous structure. In practical applications, the obtained blend (the elastomer mentioned in the present invention) is granulated to obtain the solid lubricant of the present invention. The lubricating grease in the solid lubricant is adsorbed in the micropores of the elastomer. In other words, the lubricating oil is stored in the micropores inside the polymer due to surface tension. During operation, a small amount of the lubricating oil slowly moves to the surface of the material due to capillary action. When operation stops, the lubricating oil is re-adsorbed into the polymer and stored, thereby achieving self-lubrication, dust prevention, leakage prevention, and maintenance-free. It can be applied to all industrial lubrication fields.

[0026] In the present invention, by adding a compatibilizer, two or more polymer components are mixed to improve the adhesion of the phase interface layer, promote phase dispersion, stabilize the morphological structure, and use the bonding force between polymer molecules to reduce the interfacial tension between the two phase components, increase the uniformity of the blending system, reduce phase separation, and improve the overall performance of the polymer blend.

[0027] More preferably, in the present invention, another embodiment of the present invention is to blend polyethylene PE, ultra-high molecular weight polyethylene, polyimide, PEEK polymer, polytetrafluoroethylene, polyphenylene sulfide, lubricating grease and a compatibilizer to obtain an elastomer adsorbed with lubricating grease, and by adding polytetrafluoroethylene and polyphenylene sulfide for blending, the blend has better molding properties, which is convenient for subsequent granulation.

[0028] In the present invention, the preparation process of the solid lubricant also includes a physical foaming agent, specifically supercritical CO2 as the physical foaming agent. By adding the physical foaming agent during the blending, the resulting blend can have better adsorption properties.

[0029] In the present invention, 5-50 parts of polyethylene (PE), 5-50 parts of ultra-high molecular weight polyethylene, 5-50 parts of polyimide, 5-50 parts of PEEK polymer, 5-50 parts of lubricating grease, and 5-50 parts of a compatibilizer are blended to obtain an elastomer adsorbed with lubricating grease, and the obtained elastomer is then granulated to obtain a solid lubricant. More preferably, the size of the granules is 0.05-20 mm, and the amount of lubricating grease contained is 20-95%. More preferably, the size of the granules is 0.2-2 mm. The solid lubricant (lubricating granules) of the present invention has excellent heat resistance, can fully exert the effect of reducing friction and wear, can be blended and formed, is environmentally friendly and pollution-free, is convenient to store, will not leak during use, is simple to operate, and can be mass-produced, thereby achieving maintenance-free and self-lubricating properties during use, and reducing after-sales maintenance costs.

[0030] Several embodiments of the present invention are provided below Example 1

[0031] A solid lubricant comprises the following components: polyethylene (PE), ultra-high molecular weight polyethylene (UHMWPE), polyimide, PEEK polymer, lubricating grease, and a compatibilizer. During the preparation process, the polyethylene (PE), ultra-high molecular weight polyethylene (UHMWPE), polyimide, PEEK polymer, lubricating grease, and compatibilizer are blended to obtain an elastomer adsorbed with lubricating grease. After blending, the resulting solid elastomer material is pelletized to obtain the solid lubricant. In a specific implementation process, 5-50 parts of polyethylene (PE), 5-50 parts of UHMWPE, 5-50 parts of polyimide, 5-50 parts of PEEK polymer, 5-50 parts of lubricating grease, and 5-50 parts of compatibilizer are blended to obtain an elastomer adsorbed with lubricating grease. The resulting elastomer is then pelletized. A solid lubricant is obtained, and the solid lubricant obtained after modifying the polymer material through blending also has good wear resistance. This method can be used to design high-strength wear-resistant composite materials that can work efficiently in metal-polymer units; and by adding lubricating grease to the blend, the obtained blended polymer material adsorbs saturated lubricating oil, and the lubricating oil is stored in the micropores inside the polymer based on surface tension. During operation, a small amount of lubricating oil slowly moves to the surface of the material under the action of capillaries. When the operation stops, the lubricating oil is re-adsorbed into the polymer and stored, thereby achieving self-lubrication and maintenance-free. Example 2

[0032] A solid lubricant comprises the following components: 30 parts of polyethylene (PE), 30 parts of ultra-high molecular weight polyethylene (UHMWPE), 20 parts of polyimide (PEEK), 20 parts of polytetrafluoroethylene (PTFE), 10 parts of polyphenylene sulfide (PPS), 40 parts of lubricating grease, 0.5 parts of a foaming agent, and 10 parts of a compatibilizer, wherein the compatibilizer may be an imide-type, oxazoline-type, or isocyanate-type compatibilizer. During the preparation process, the polyethylene (PE), UHMWPE, polyimide, PEEK, PEEK, PTFE, PPS, lubricating grease, foaming agent, and compatibilizer are blended to obtain an elastomer adsorbed with lubricating grease. After blending, the obtained solid elastomer material is granulated to obtain a solid lubricant. In this embodiment, polytetrafluoroethylene and polyphenylene sulfide are added for blending so that the obtained polymer material also has good mechanical and thermal stability properties; and supercritical CO2 is added as a physical foaming agent for blending so that the obtained polymer elastomer has a stronger adsorption capacity, so that the obtained solid lubricant has better self-lubricating properties. The prepared solid lubricant, when applied to bearings, can reduce the friction coefficient by more than half. Example 3

[0033] A solid lubricant comprises the following components: 30 parts of polyethylene (PE), 30 parts of ultra-high molecular weight polyethylene (UHMWPE), 20 parts of polyimide, 20 parts of PEEK polymer, 10 parts of polytetrafluoroethylene (PTFE), 10 parts of polyphenylene sulfide (PPS), 10 parts of epoxy resin, 10 parts of cellulose acetate, 40 parts of lubricating grease, 0.5 parts of foaming agent, and 10 parts of a compatibilizer, wherein the compatibilizer may be an imide-type, oxazoline-type, or isocyanate-type compatibilizer; in the preparation process, polyethylene (PE), UHMWPE, polyimide, PEEK polymer, polytetrafluoroethylene, PPS, epoxy resin, cellulose acetate, lubricating grease, foaming agent, and compatibilizer are blended to obtain an elastomer adsorbing lubricating grease; and after blending, the elastomer is further obtained. The obtained solid elastomer material is then granulated to obtain a solid lubricant. In this embodiment, polytetrafluoroethylene and polyphenylene sulfide are added for blending so that the obtained polymer material also has good mechanical and thermal stability properties; and supercritical CO2 is added as a physical foaming agent for blending so that the obtained polymer elastomer has a stronger adsorption capacity, thereby obtaining a solid lubricant with better self-lubricating properties; and epoxy resin and cellulose acetate are added to make the solid lubricant have better elasticity, flexibility, and tear resistance. The prepared solid lubricant, when applied to bearings, can reduce the friction coefficient by more than half. Example 4

[0034] A solid lubricant comprises the following components: 30 parts of polyethylene (PE), 30 parts of ultra-high molecular weight polyethylene (UHMWPE), 20 parts of polyimide, 20 parts of PEEK polymer, 10 parts of polytetrafluoroethylene (PTFE), 10 parts of polyphenylene sulfide (PPS), 10 parts of epoxy resin, 10 parts of cellulose acetate, 10 parts of polyacrylonitrile (PAN), 10 parts of carboxymethyl cellulose (CMC), 50 parts of lubricating grease, 0.5 parts of foaming agent, and 10 parts of compatibilizer, wherein the compatibilizer may be an imide-type, oxazoline-type, or isocyanate-type compatibilizer; in the preparation process, polyethylene (PE), UHMWPE, polyimide, PEEK polymer, polytetrafluoroethylene, PPS, epoxy resin, cellulose acetate, polyacrylonitrile, CMC, lubricating grease, foaming agent, and compatibilizer are blended to obtain an elastomer adsorbing lubricating grease; and after the blending, the elastomer is subjected to the following steps: After mixing, the obtained solid elastomer material is granulated to obtain a solid lubricant. In this embodiment, polytetrafluoroethylene and polyphenylene sulfide are added for blending so that the obtained polymer material also has good mechanical and thermal stability properties; and supercritical CO2 is added as a physical foaming agent for blending so that the obtained polymer elastomer has a stronger adsorption capacity, so that the obtained solid lubricant has better self-lubricating properties; and epoxy resin, cellulose acetate, polyacrylonitrile, and carboxymethyl cellulose are added to make the solid lubricant more elastic, flexible, and tear-resistant, and to increase the service life of the solid lubricant. The prepared solid lubricant, when applied to bearings, can reduce the friction coefficient by more than half. Example 5

[0035] A solid lubricant comprises the following components: 30 parts of polyethylene (PE), 30 parts of ultra-high molecular weight polyethylene (UHMWPE), 20 parts of polyimide, 20 parts of PEEK polymer, 10 parts of polytetrafluoroethylene (PTFE), 10 parts of polyphenylene sulfide (PPS), 10 parts of epoxy resin, 10 parts of cellulose acetate, 10 parts of polyacrylonitrile (PAN), 10 parts of carboxymethyl cellulose, 5 parts of chlorinated polyethylene (CP), 5 parts of EPDM rubber (EPDM), 50 parts of lubricating grease, 0.5 parts of foaming agent, and 10 parts of a compatibilizer, wherein the compatibilizer may be an imide-type, oxazoline-type, or isocyanate-type compatibilizer. During the preparation process, the polyethylene (PE), UHMWPE, polyimide, PEEK polymer, polytetrafluoroethylene, PPS, epoxy resin, cellulose acetate, polyacrylonitrile, carboxymethyl cellulose, chlorinated polyethylene, EPDM rubber, lubricating grease, foaming agent, and compatibilizer are blended to obtain a solid lubricant adsorbed with lubricating oil. The solid lubricant is obtained by granulating the obtained solid elastomer material after blending. In this embodiment, polytetrafluoroethylene and polyphenylene sulfide are added for blending so that the obtained polymer material also has good mechanical and thermal stability; and supercritical CO2 is added as a physical foaming agent for blending so that the obtained polymer elastomer has a stronger adsorption capacity, so that the obtained solid lubricant has better self-lubricating properties; and epoxy resin, acetate fiber, polyacrylonitrile, carboxymethyl cellulose, chlorinated polyethylene, and EPDM rubber are added to make the solid lubricant have better elasticity, flexibility, and tear resistance, and also increase the service life of the solid lubricant. The prepared solid lubricant, when applied to bearings, can reduce the friction coefficient by more than half.

[0036] The technical principles of the present invention have been described above in conjunction with specific embodiments, which are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions based on the principles of the present invention fall within the scope of protection of the present invention. Those skilled in the art will be able to conceive of other specific embodiments of the present invention without inventive effort, and such methods will fall within the scope of protection of the present invention.

Claims

1. A lubricant in solid form, characterized in that: It includes an elastomer with a microporous structure, in which saturated lubricating grease is adsorbed. Under the action of external force, the elastomer squeezes the lubricating grease out of the microporous structure and wraps it on the outside of the elastomer to form a self-lubricating state, and then it is re-adsorbed into the microporous structure as the external force weakens.

2. A lubricant in solid form as claimed in claim 1, characterized in that: The elastic body and the lubricating grease are integrally formed.

3. A lubricant in solid form as claimed in claim 1, characterized in that: The physical shape of solid lubricants can be regular or irregular.

4. A lubricant in solid form as claimed in claim 1, characterized in that: The invention comprises a blend, a lubricating grease and a compatibilizer, wherein the blend comprises polyethylene, polypropylene, biaxially oriented polypropylene, high-density polyethylene, polyacrylonitrile, butadiene, styrene, polycarbonate, polyether sulfone, phenolic resin, polyimide, polysulfone, polyurethane, polyvinyl chloride, polyoxymethylene, polyamide, polycaprolactam, polyhexamethylene adipamide, polybutylene terephthalate, polyethylene terephthalate, epoxy resin, polymethyl methacrylate, polyphenylene oxide, polyphenylene sulfide, polystyrene, polytetrafluoroethylene, polyether At least one of ether ketone, unsaturated polyester, ultra-high molecular weight polyethylene, polyvinyl fluoride, polyetherimide, cellulose acetate, carboxymethyl cellulose, chlorinated polyethylene, ethylene propylene diene monomer rubber, expandable polystyrene, liquid crystal polymer, medium density polyethylene, low density polyethylene, linear low density polyethylene, polyarylether, polyaryletherketone, polyamideimide, polyacrylonitrile, polyarylate, polyetherketone, thermoplastic polyurethane, thermoplastic elastomer, styrene acrylonitrile polymer, styrene butadiene copolymer, chlorinated polyvinyl chloride, and polyvinylidene fluoride.

5. A lubricant in solid form as claimed in claim 1, characterized in that: 5-50 parts of polyethylene PE, 5-50 parts of ultra-high molecular weight polyethylene, 5-50 parts of polyimide, 5-50 parts of PEEK polymer, 5-50 parts of lubricating grease and 5-50 parts of compatibilizer are blended to obtain an elastomer adsorbed with lubricating grease, and then the obtained elastomer is granulated to obtain a lubricant in solid form.

6. A lubricant in solid form as claimed in claim 1, characterized in that: The invention comprises the following components: 30 parts of polyethylene PE, 30 parts of ultra-high molecular weight polyethylene, 20 parts of polyimide, 20 parts of PEEK polymer, 10 parts of polytetrafluoroethylene, 10 parts of polyphenylene sulfide, 10 parts of epoxy resin, 10 parts of cellulose acetate, 10 parts of polyacrylonitrile, 10 parts of carboxymethyl cellulose, 50 parts of lubricating grease, 0.5 parts of foaming agent and 10 parts of compatibilizer, wherein the compatibilizer is an imide type, oxazoline type or isocyanate type compatibilizer; in the preparation process, polyethylene PE, ultra-high molecular weight polyethylene, polyimide, PEEK polymer, polytetrafluoroethylene, polyphenylene sulfide, epoxy resin, cellulose acetate, polyacrylonitrile, carboxymethyl cellulose, lubricating grease, foaming agent and compatibilizer are blended to obtain the obtained product.

7. A lubricant in solid form as claimed in claim 1, characterized in that: 5-50 parts of polyethylene PE, 5-50 parts of ultra-high molecular weight polyethylene, 5-50 parts of polyimide, 5-50 parts of PEEK polymer, 5-50 parts of polytetrafluoroethylene, 5-50 parts of polyphenylene sulfide, 5-50 parts of lubricating grease and 5-50 parts of compatibilizer are blended to obtain an elastomer adsorbed with lubricating grease.

8. A solid lubricant according to claim 4 or 7, characterized in that: It also includes a physical foaming agent, specifically supercritical CO2 as a physical foaming agent; The invention comprises the following components: 30 parts of polyethylene PE, 30 parts of ultra-high molecular weight polyethylene, 20 parts of polyimide, 20 parts of PEEK polymer, 10 parts of polytetrafluoroethylene, 10 parts of polyphenylene sulfide, 40 parts of lubricating grease, 0.5 parts of foaming agent and 10 parts of compatibilizer.

9. A lubricant in solid form as claimed in claim 4, characterized in that: 30 parts of polyethylene PE, 30 parts of ultra-high molecular weight polyethylene, 20 parts of polyimide, 20 parts of PEEK polymer, 10 parts of polytetrafluoroethylene, 10 parts of polyphenylene sulfide, 10 parts of epoxy resin, 10 parts of cellulose acetate, 40 parts of lubricating grease, 0.5 parts of foaming agent and 10 parts of compatibilizer are blended to obtain an elastomer adsorbed with lubricating grease, and then the obtained elastomer is granulated to obtain a lubricant in solid form.

10. A lubricant in solid form as claimed in claim 9, characterized in that: The granulation size is 0.05~20mm and the lubricating oil content is 20-95%.

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