There are mainly two materials: PTFE and glass fiber PTFE. Used in strong corrosive media with lower temperature and various pressures. There are steel belt-asbestos, steel belt-PTFE, steel belt-flexible graphite, etc.Graphite Gasket Flat gasket made of soft graphite, suitable for high temperature and strong corrosive media. Suitable for valves with higher temperature ptfe coated fiberglass adhesive tapes Manufacturers and pressure.

Metal gaskets include pure iron, very soft steel, stainless steel, aluminum and other materials. Generally used on the sealing surface of concave and convex flanges. There are three main types of metal gaskets: 1. Generally used for concave and convex flange sealing surface. Suitable for higher temperature medium pressure valves. The metal-clad graphite gasket used for high-temperature and high-pressure valves is made of thin metal-coated annular asbestos gaskets. Used in higher temperature medium pressure valves.

PTFE gaskets are generally used for tongue-and-groove sealing surfaces. Spiral wound gaskets are made of corrugated metal tape and sealing material tape mixed and wound. The advantages are good corrosion resistance and thermal stability, good plasticity, and a smaller compression force to ensure sealing. Lens gasket-suitable for lens flange sealing surface.. The tooth form is a bevel tooth-shaped corrugation processed on the sealing surface of the metal flat gasket-suitable for Concave-convex flange sealing surface 3.

The disadvantage is that the strength is low and it is easy to stick to the flange sealing surface. Octagonal and elliptical gaskets-suitable for the sealing surface of trapezoidal groove flanges. Asbestos rubber gaskets include universal asbestos boards and anti-corrosion asbestos boards. 2. Asbestos rubber gasket is suitable for smooth flange sealing surface, concave and convex flange sealing surface and tongue and groove flange sealing surface.

Generally, asbestos boards, acid-resistant asbestos boards, oil-resistant asbestos boards, and metal wire asbestos boards are used. The processing accuracy and surface roughness of the metal gasket sealing surface The requirements are very high and the bolt compression force is very large

Add an appropriate amount of PTFE particles into the acidic electroless nickel plating solution and perform mechanical stirring. After Ti-6A4V undergoes pretreatments such as degreasing, oxide film removal, and activation, electroless Ni   PTFE can be carried out. Coating PTFE directly on the Ti alloy surface has low bonding strength and is easy to peel off. The obtained NiPTFE composite The volume content of PTFE in the layer reaches 10% to 15%, and the coating has a gray metallic luster.

Based on the above reasons, the article will use electroless Ni ; P as a matrix to support PTFE particles. PTFE has a very low friction factor and has a good anti-friction effect. Observation of the coating by SEM shows that the PTFE particles are distributed evenly in the coating, and the coating is flat without pores. Its tribological characteristics are closest to human cartilage tissue. Electroless Ni-P-PTFE plating requires PTFE particles to be evenly dispersed in the solution. Its wear factor increases with sliding The distance increases but remains basically unchanged, and the fluctuation of the friction factor is also very small.

After the Ti-6A I-4V alloy is treated by electroless Ni-P-PTFE plating, the friction and wear properties are significantly improved. A Ni-P-PTFE composite coating was deposited on the surface of the Ti alloy to obtain a self-lubricating and low friction coefficient surface modification layer on the surface of the Ti alloy, and the friction and wear properties of Ni-P-PTFE were studied.. The process conditions of PTFE are as follows:  pH value 4. This experiment uses PTFE particles with a particle size of about 0. ;PTFE shows high wear resistance, The amount of wear reaches a stable value in a short time, and then shows a downward trend as the wear time increases.6～5.5 tJm. It is currently the best artificial solid antifriction material.5cm, the load is 50N, and the sliding speed is 1 m/s. However, PTFE itself has low strength, extremely low surface energy, and poor affinity with metals.0; temperature 85℃.

The added surfactant is a mixture of nonionic surfactant and cationic surfactant, Not only makes the PTFE PTFE coated tape Manufacturers particles in the plating solution have good suspension, but also makes the PTFE particles positively charged, which promotes the adsorption of PTFE particles on the Ti-6A1\u0026mdash;4V surface and the co-deposition with Ni-P. Electroless Ni-P. The test is carried out under dry friction conditions. Therefore, coating PTFE on the alloy surface will greatly improve Ti The sliding friction properties of the alloy.05 to 0. The friction and wear test is in the MM-200 wear test It is carried out on the machine, the pair of grinding couple is GCrl 5, the radius is 23.PTFE has excellent chemical stability and good self-lubricating properties

After standing at 24~30℃ for 24h, the bonding will be firm. The bonding steps are as follows: (1) Preparation of treatment solution: Add a certain amount of sodium metal to the solution of tetrahydrofuran and naphthalene, the mass fraction of sodium metal is controlled at 3%~5%, and stir at room temperature for about 2h until the color of the solution is dark brown or Black (2) Immerse the PTFE workpiece to be processed into the solution for about 5-10 minutes, take it out and soak it in acetone solution for 3-5 minutes;

Take out the workpiece from the acetone solution, rinse it with clean water, and place it in a dark place to dry naturally; (4) Choose epoxy resin, silicone or polyurethane as the adhesive, evenly spread on the treated surface to be bonded and bond immediately.

These groups can increase the surface energy, reduce the contact angle, improve the wettability, and change from difficult to sticky to sticky.The sodium naphthalene solution treatment of fluorine-containing materials is mainly through the chemical reaction between the corrosive liquid and the PTFE plastic to tear off part of the fluorine atoms on the surface of the material, thus leaving BBQ grill mesh mat a carbonized layer and certain polar groups on the surface.

This is the most effective and commonly used method among all methods currently studied.. Generally, sodium naphthalene tetrahydrofuran is used as the etching solution. Infrared spectroscopy shows that polar groups such as hydroxyl, carbonyl and unsaturated bonds are introduced on the surface

The series of products manufactured by the application of lining technology mainly include straight pipes, elbows, tees, crosses, different pipes, and long-term products, which can meet the anti-corrosion needs of various industries.1-0.

The processes are as follows:  Plate selection detection The main parameters of the welded parts are: internal welding adopts hot pressure lap welding, the width of the weld is 20-25mm, the pressure of the weld is 0.

The lining can be divided into loose lining and tight lining.Polytetrafluoroethylene is soft and low in strength. Polytetrafluoroethylene has poor melt fluidity, and the soil layer must reach a certain thickness to meet the anti-corrosion requirements. Generally, there are two forms PTFE BBQ Mesh Mat of coating and plate as a lining.

After the lining material is screened, a plate with a turning degree of about 3 mm and a width of 1400 mm or less is used. It can be used as a lining material in the field of anti-corrosion.2MPa, and the temperature is 360-380℃. Therefore, as equipment lining, sheet material is more used. The plate is passed through a 20,000 volt high-voltage electric scanning Wu Ji, and the plate surface is flat

Corrosive materials, insulating materials, anti-stick coatings, etc. make it an irreplaceable product. To Polytetrafluoroethylene is widely used in industries such as nuclear energy, national defense, aerospace, electronics, electrical, chemical, machinery, instruments, meters, construction, textiles, metal surface treatment, pharmaceuticals, medical care, food, metallurgy and smelting, etc

.Polytetrafluoroethylene can be formed PTFE coated adhesive tapes by pushing or extrusion processing; it can be used in Teflon spraying series of high-temperature wires, or it can be made into a film and then cut into a shaft-mounted PTFE tape for the production of high-frequency cables.Used as engineering plastics, it can be made into PTFE tubes, rods, belts, plates, films, etc.

To PTFE has outstanding excellent comprehensive properties, high temperature resistance, corrosion resistance, non-stick, self-lubricating, excellent dielectric properties, and a very low friction coefficient. The wear resistance and limit PV value can be increased by 1000 times. . At the same time, other excellent properties of PTFE are maintained. This material is resistant to acids, alkalis, and various organic solvents, and is almost insoluble in all solvents. Water dispersion can be used for coating, impregnation or making fibers.

Filled varieties include glass fiber, metal, metal oxide, graphite, molybdenum disulfide, carbon fiber, polyimide, EKONOL, etc. Products of this material are generally collectively referred to as 'non-stick coating'; it is a synthetic polymer material that uses fluorine to replace all hydrogen atoms in polyethylene. with high performance requirements. Coating on the surface of the bullet head can increase the penetration of the bullet, so that the bullet can shoot through the body armor.

Polytetrafluoroethylene (Polytetrafluoroethylene), the English abbreviation is PTFE, . Adding any filler that can withstand the sintering temperature of polytetrafluoroethylene, its mechanical properties can be greatly improved.

At the same time, PTFE has the characteristics of high temperature resistance, and its friction coefficient is very low, so it can be used as a way of lubrication, and it has also become an ideal coating for the inner layer of non-stick pots and water pipes. Generally used in corrosion-resistant pipelines, containers, pumps, valves, radar, high-frequency communication equipment, radio equipment, radomes, etc