PTFE Products - Unleash Industrial Efficiency with Rubber PTFE Gaskets

Rubber PTFE Gaskets are high-performance sealing solutions used in a variety of industrial applications. They are made from a combination of rubber and polytetrafluoroethylene (PTFE) materials, which provides excellent chemical resistance, high-temperature stability, and superior sealing properties. Rubber PTFE Gaskets offer improved performance and reliability compared to traditional gaskets, making them an ideal choice for industries where efficiency and safety are paramount.

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PTFE Products - Stainless steel PTFE Teflon oil seal

PTFE stainless steel oil seals are available in the following forms: single lip, double lip, triple lip, and quadruple lip; forward or reverse lips, or both. The lip part is made of PTFE composite material, which has passed the FDA environmental protection certification; the wear resistance and fatigue resistance of the sealing lip are greatly improved; the skeleton is made of 304/316 stainless steel (with good corrosion resistance). WhatsApp/phone: +8619975113419 https://ptfe-machinery.com/ https://www.sukopolymer.com/ https://www.sukoplastic.com/ mail: info@ptfe-machinery.com

PTFE Products - Teflon PTFE Filter Bag

PTFE Products - Teflon PTFE Filter Bag WhatsApp/phone: +8619975113419 https://ptfe-machinery.com/ https://www.sukopolymer.com/ mail: info@ptfe-machinery.com PTFE filter bag is one of the best filter medias among all the non-woven felt filter bags, it can also be called teflon filter bags; it's a high grade product of filter bag. PTFE filter bag has the best chemical resistance property. Due to its PTFE membrane, it has a very good filtration efficiency. Its working life can reach 5 years in the normal working condition.

PTFE Products - PTFE Teflon Wire

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PTFE Products - Teflon Glass Fabric

PTFE Products - Teflon Glass Fabric WhatsApp/phone: +8619975113419 mail: info@ptfe-machinery.com https://ptfe-machinery.com/ https://www.sukopolymer.com/

PTFE Products - Teflon PTFE Hose Pipe Tube

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PTFE Products - PTFE Teflon Tube Pipe by SuKo

PTFE Products - PTFE Teflon Tube Pipe by SuKo 

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PTFE Teflon High Temperature Adhesive Tape - PTFE Products by SuKo

PTFE Teflon High Temperature Adhesive Tape - PTFE Products by SuKo

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PTFE Products - PTFE Teflon Rod - 100% virgin ptfe material

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PTFE Products - Teflon Gasket making process

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PTFE Product - PTFE Corrugated Pipe - Teflon Retractable Tube

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Study on Sintering of Ptfe

From the perspective of the three factors that determine the properties of PTFE products -- molecular weight, crystallinity and voidage, the voidage is mainly affected by the preforming pressure, and the molecular weight and crystallinity all change with the different sintering conditions. Therefore, sintering process conditions play a decisive role in the final properties of products such as density, hardness, permeability and mechanical properties.

Wang ping found that the sintering process of PTFE was affected by the rising and falling speed, sintering temperature and sintering time. The larger the product, the slower the speed of rising and cooling, the longer the sintering time. The sintering temperature of suspension resin is higher than that of dispersion resin. The sintering temperature of pure material products is higher than that of filled products. In general, the rate of warming is faster than the rate of cooling. In the same sintering furnace, pure material and filling products cannot be mixed; Products with different sintering conditions cannot be mixed. Products of different raw materials cannot be mixed. Taking the production of 3-layer molded circular plate with diameter of 1 m, thickness of 20 mm, double layer as pure ptfe and middle layer as filled ptfe as an example, the compression strength, bending strength, hardness and other mechanical properties of the circular laminated plate produced by this technology have been greatly improved.

Liu xianlan studied the forming process characteristics, forming method and mold design characteristics of PTFE, analyzed the defects and causes of PTFE products produced by cold pressing and sintering, and put forward the treatment methods. PTFE can be molded by a variety of preforming processes, such as molding, extrusion, hydraulic molding, push molding and secondary processing, and then sintered to the final product.PTFE molding is mostly made of suspended resin. When the thickness of sheet is less than 1.5mm, disperse resin is used. Its technological process: resin - sieve (suspension resin after pounding, loose, and the 20 mesh mesh sieve) - press (PTFE powder loading the mould under pressure from 20 to 35 MPa, after press compaction forming) - sintering (in 370 ~ 380 "C temperature sintering in sintering furnace) - moulded products (under free state within the mold or after cooling to finalize the design as required by the board, rods, tubes, gaskets and packing products, etc.).Hydraulic method is also called the equilibrium method or rubber molding in its operating process is: put rubber bag in die - connected to the water pump, filling the water swell the rubber bag into a cylindrical - resin evenly join between bag and external mold mold closing - continue to gradually increase the water pressure, water filling up to 12 ~ 13 mpa pressure maintaining 30 min: after water - decompression, ripping, sintering, cooling is the use of bright and clean appearance. Push is also called the paste extrusion molding, 20 ~ 30 mesh sieve dispersion resin and organic liquid (such as toluene, petroleum ether, the solvent oil) mixture 1:5 paste mixture, preloading into thick wall cylinder billet, push into the compressor cylinder, heating, with a plunger push molding, after drying in the 360 ~ 380 ° C temperature sintering, after cooling products have strong push tube, rod, etc.Extrusion molding can be divided into two types: screw extrusion and plunger extrusion. The pre-sintered resin after crushing and sifted is added to the material cylinder. Through screw rotation or reciprocating push of plunger, the raw material is transported to the extruder at the same time of compaction.

Wang ping studied the forming process of PTFE foam material. Suspended polytetrafluoroethylene is used as raw material, and condensed cyclic aromatic hydrocarbons are selected as pore-forming agent. After mixing, preforming products are preformed and sintered. At the initial stage of sintering, drying process is adopted to make pore-forming agent escape, and then resintering stage is entered. Foam materials with different dielectric constants can be prepared in different proportions to meet various requirements.

Chen xu et al. conducted compression test and sintering test on PTFE, discussed the relationship between density, compression strength and compression modulus, and analyzed the compression strength of specimens under different sintering processes, and obtained more appropriate molding pressure and sintering process. The results showed that the compression strength of PTFE decreased with the increase of pressing pressure, and the compression modulus increased with the increase of pressing pressure. The molding pressure was 27.5mpa, sintering temperature was 380 C, and the insulation time was 4h.

In order to overcome the disadvantages of pure ptfe, such as poor abrasion resistance and large thermal expansion coefficient, Raytheon studied the bronze-filled particles in ptfe, and expanded the application scope of ptfe. The conventional warm pressing molding of ptfe is characterized by long cycle, poor performance, low dimensional accuracy and smoothness, while the warm pressing molding in this study has fewer working procedures, short cycle and significantly improved mechanical properties.

Study on preparation and technology of ptfe hollow fiber membrane

Hollow fiber membrane is widely used in traditional and new membrane separation components such as ultrafiltration, microfiltration, reverse osmosis and gas separator due to its small area, high filling density, high utilization rate, easy to enlarge and easy to clean.In addition, polytetrafluoroethylene hollow fiber membrane has high mechanical strength, acid and alkali resistance, high and low temperature resistance, low friction coefficient on the surface, so it has great potential in special filtration, gas absorption, ozone dissolution filtration, membrane distillation and other fields.PTFE hollow fiber membrane was prepared by using PTFE dispersion resin as raw material and adding exxonmobil Isopar series lubricants through extrusion and stretching molding.

Average extrusion pressure, pore diameter and bubble point pressure, porosity, water flux, contact Angle, SEM and DSC were used to characterize the structure and performance of PTFE hollow fiber membrane.The experiment mainly discusses the influences of lubricants (types and ratios), extrusion process (compression ratio, length-diameter ratio and cone Angle) and tensile sintering process on PTFE structure and performance, and optimizes the process parameters to provide guidance for PTFE hollow fiber membrane production.

Specific research contents are as follows:

(a)     the experiment changed the lubricant parameters (including the type and ratio of lubricants) and prepared PTFE hollow fiber membrane through the process route of "mixing → pre-molding → extrusion → stretching → sintering → natural cooling".The experiment explored the influence of lubricant type and ratio on the structure and performance of PTFE hollow fiber membrane, and obtained the best combination of lubricant type and ratio and optimized lubricant.

(b)     by changing the parameters of extrusion process molds, the influences of RR, L/D and alpha on extrusion pressure, membrane fracture strength, average pore diameter, bubble point pressure, porosity and water flux were explored to obtain the best extrusion parameters.

(c)     By adjusting the tensile process parameters (tensile multiple and tensile temperature) and sintering process parameters (sintering temperature and sintering time), the influences of tensile sintering process on the average pore diameter, bubble point pressure, porosity and water flux of PTFE hollow fiber membrane were explored to obtain the optimal tensile sintering process parameters and optimize the tensile sintering process.

Experimental results show that:

(1)     PTFE hollow fiber membrane has small average pore diameter, high bubble point pressure and porosity, large water flux fracture strength and contact Angle, and low extrusion pressure in the extrusion process.When the lubricant content is too high or too low, the structure and properties of PTFE hollow fiber membrane will be adversely affected to some extent.

(2)     When RR=185, L/D=20, and alpha =40°, the extrusion pressure is low, the fracture strength is large, the average pore diameter is small, the bubble point pressure is high, the porosity is large, and the water flux is high, which can be used as the extrusion process parameters of excellent PTFE hollow fiber membrane.

The influences of tensile and sintering processes on the microstructure and properties of PTFE hollow fiber membrane are as follows: with the increase of tensile multiple, the average pore size and porosity of PTFE hollow fiber membrane are large, the bubble point pressure is small, and the water flux is large.With the increase of tensile temperature, the average pore diameter and water flux of PTFE hollow fiber membrane increase, the porosity increases, and the bubble point pressure decreases.With the increase of sintering temperature, the pore diameter, bubble point pressure and water flux of PTFE hollow fiber membrane decrease, and the porosity has no obvious change rule.With the increase of sintering time, the average pore diameter, porosity and water flux of PTFE hollow fiber membrane increase, and the bubble point pressure decreases.

The drawing process significantly reduces the crystallinity of PTFE products, while the sintering process further reduces the crystallinity of PTFE products.When the tensile multiple is 100%, the tensile temperature is 300℃, the sintering temperature is 320℃ and the sintering time is 5min, the average pore diameter of hollow fiber membrane is small, and the bubble point pressure, porosity and water flux are large.

What is suspended ptfe and dispersed ptfe?

Due to the different polymerization methods of ptfe, there are suspension materials (suspension polymerization) and dispersion materials (dispersion polymerization), namely suspension ptfe, disperse ptfe, the processing methods of the two materials are also different.

Suspended material (suspended polytetrafluoroethylene)

Its main forming method is die pressing method, that is, white powder without a little additive, then die pressing forming, sintering above its melting point temperature, and then through appropriate mechanical processing into products, the representative products for the plate, bar, tube, film four categories.

Dispersion material (ptfe)

PTFE fine powder prepared by dispersion polymerization method is generally referred to as "dispersion".Because of the fibrotic properties of this fine powder, especially at temperatures above 20℃, it is recommended to store, transport and mix the material at 5 ~ 10℃.The forming method of this kind of material is to use an auxiliary agent (usually petroleum ether or gasoline) and powder after mixing in the environment of 24℃ or more for about 24h (complete the crystal phase change) and then forming, with the piston extrusion forming, drying, burning.This processing method is commonly known as paste extrusion, also known as push.

Due to the dispersion of fine powder particle size, divided into several grades of specifications, different specifications have different compression ratio characteristics.Compression ratio of less than 100, generally used to produce raw material and microporous tape;Low compression ratio of less than 500, used to produce medium and large specification products;500 ~ 2000 is medium compression ratio.2000 ~ 4400 is high compression ratio material, this material is suitable for the production of thin wall thin line, can continuously large length and high efficiency production.

Identification method: the main difference is the particle size of the two are not the same.Suspension material is coarse, dispersion material is fine.

reinforced thermoplastic pipe manufacturer & suppliers

Reinforced thermoplastic pipe (RTP) is a generic term referring to a reliable high strength synthetic fibre (such as glass, aramid or carbon), initially developed in the early 1990s by Wavin Repox, Akzo Nobel and by Tubes d'Aquitaine from France, who developed the first pipes reinforced with synthetic fibre to replace medium pressure steel pipes in response to growing demand for non-corrosive conduits for application in the onshore oil and gas industry, particularly in the Middle East.
Typically, the materials used in the construction of the pipe might be Polyethylene (PE), Polyamide-11 or PVDF and may be reinforced with Aramid or Polyester fibre although other combinations are used.

More recently the technology of producing such pipe, including the marketing, rests with a few key companies, one of which is Pipelife with Soluforce where it is available in coils up to 400 m (1,312 ft) length. These pipes are available in pressure ratings from 30 to 90 bar (3 to 9 MPa; 435 to 1,305 psi). Over the last few years this type of pipe has been acknowledged as a standard alternative solution to steel for oilfield flowline applications by certain oil companies and operators. The great advantage of this pipe is also its very fast installation time compared to steel pipe when considering the welding time as average speeds up to 1,000 m (3,281 ft)/day have been reached installing RTP in ground surface.

Primarily, the pipe provides benefit to applications where steel may rupture due to corrosion and installation time is an issue.

PTFE is a thermoplastic polymer, which is a white solid at room temperature, with a density of about 2200 kg/m3. According to Chemours, its melting point is 600 K (327 °C; 620 °F).[19] It maintains high strength, toughness and self-lubrication at low temperatures down to 5 K (−268.15 °C; −450.67 °F), and good flexibility at temperatures above 194 K (−79 °C; −110 °F). PTFE gains its properties from the aggregate effect of carbon-fluorine bonds, as do all fluorocarbons. The only chemicals known to affect these carbon-fluorine bonds are highly reactive metals like the alkali metals, and at higher temperatures also such metals as aluminium and magnesium, and fluorinating agents such as xenon difluoride and cobalt(III) fluoride.

The coefficient of friction of plastics is usually measured against polished steel.PTFE's coefficient of friction is 0.05 to 0.10, which is the third-lowest of any known solid material (BAM being the first, with a coefficient of friction of 0.02; diamond-like carbon being second-lowest at 0.05). PTFE's resistance to van der Waals forces means that it is the only known surface to which a gecko cannot stick. In fact, PTFE can be used to prevent insects climbing up surfaces painted with the material. PTFE is so slippery that insects cannot get a grip and tend to fall off. For example, PTFE is used to prevent ants climbing out of formicaria.

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Machine Teflon Lining for Pipe and Fitting

Teflon PTFE lining high viscosity in the gel state (it does not truly melt) prevents it from being processed conventionally in extruders or injection molding. PTFE tubing is therefore dry molded or extruded in hydraulic extruders with (paste extrusion) or without (ram extrusion) lubricants. Paste extrusion of PTFE yields flexible tubing. However, it occurs in a batch process and thus long continuous lengths are limited to the batch size, unlike the melt-processible fluoropolymers FEP, PFA and ETFE.

PTFE is highly corrosion resistant and lined equipment is used to convey the most corrosive and toxic chemicals in manufacturing plants around the world. 

This PTFE lining Extruder is to extrude PTFE lining,It keeps stable ram speed and produces precise high quality PTFE liner products. with our original technology. The PTFE liner ram extruder series from Sunkoo is able to extrude tube which dia from 20- 150mm.

Advantages:

* Save time and money; * Advance designed; * High output; * Low energy consumption; * Long-life; * PC touch screen,extremely user-friendly operation; * The extrude PTFE tubes physical properties is stable and adjustable;

A PTFE liner, which is several millimetres thick, protects the stainless steel reactor efficiently against corrosion, even against such corrosive media as acids and alkali. PTFE is distinguished by its excellent resistance to almost all chemicals, which makes it possible to do without many expensive special alloys. This significantly reduces the acquisition costs. 

The risk of possible cross-contaminations is easier to control with PTFE liners. Metallic catalysers, such as Pt, Rh, Raney Nickel etc adhere to steel reactors and are very difficult to remove. In the following experiments the question keeps cropping up if the effects observed are really caused by the change of catalyser, contamination effects or catalyst poisoning. This problem is elegantly evaded by reserving a PTFE liner for each type of catalyser.

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PTFE Products and attributes

PTFE's mechanical properties are low compared to other plastics, and can be used over a wide temperature range of -100°F to +400°F (-73°C to 204°C). ). It has excellent thermal and electrical insulation properties and a low coefficient of friction. PTFE is very dense and cannot be processed by melting. PTFE must be compressed and sintered to form useful shapes. 

PTFE Sheet, Rod, & Tube - Thermal stability PTFE is one of the most thermally stable plastic materials. There are no appreciable decompositions at 260°C, so that PTFE, at this temperature, still possesses most of its properties. Appreciable decomposition begins at over 400°C.

PTFE Transition points -The geometry of the PTFE molecules (crystalline structure) varies with the temperature. There are different transition points, with the most important ones being the following: that at 19°C corresponding to a modification of some physical properties and that at 327°C which corresponds to the disappearance of the crystalline structure: the PTFE assumes an amorphous aspect conserving its own geometric form.

PTFE Expansion -The linear thermal expansion coefficient varies with the temperature. In addition, because of the orientation caused by the working process, the PTFE pieces are generally anisotropic; in other words, the coefficient of expansion varies also in relation to direction.

PTFE Thermal conductivity -The coefficient of the thermal conductivity of PTFE does not varies with the temperature. It is relatively high, so that PTFE can be considered to be a good insulating material. The mixing of suitable fillers improves the thermal conductivity (see filled PTFE).

PTFE Specific heat -The specific heat, as well as the heat content (enthalpy) increases with the temperature.

PTFE Behaviour in presence of foreign agents

PTFE Resistance to chemical agents -PTFE is practically inert against known elements and compounds. It is attacked only by the alkaline metals in the elementary state, by Chlorine trifluoride and by elementary Fluorine at high temperatures and pressures.

PTFE Solvent resistance -PTFE is insoluble in almost all solvents at temperatures up to about 300°C. Fluorinated hydrocarbons cause a certain swelling which is however reversible; some highly fluorinated oils, at temperatures over 300°C, exercise a certain dissolving effect upon PTFE.

PTFE Resistance to atmospheric agents and light -Test pieces of PTFE, exposed for over twenty years to the most disparate climatic conditions, have not shown any alteration of their characteristic properties.

PTFE Resistance to radiations -High energy radiations tend to cause the breaking of the PTFE molecule, so that the resistance of the product to radiations is rather poor.

PTFE Gas permeability -The permeability of PTFE is similar to other plastic materials. The permeability does not depend, obviously, only on the thickness and pressure, but also on the working techniques.
Physical - mechanical properties

Tensile and compressive properties These properties are to a large degree influenced by the working processes and the employed powder. PTFE, however, can be used continuously at temperatures up to 260°C, while possessing still a certain compressive plasticity at temperatures near to the absolute Zero.

PTFE Flexibility -PTFE is quite flexible and does not break when subjected to stresses of 0,7 N/mm2 according to ASTM D 790. Flexural modulus is about 350 to 650 N/mm2 at room temperature, about 2000 N/mm2 at -80°C, about 200 N/mm2 at 100°C and about 45 N/mm2 at 260°C.

Impact properties -PTFE possesses very high resilience characteristics also at low temperatures.

Plastic memory -If a piece of PTFE is subjected to tensile or compression stresses below the yield point, part of the resulting deformations remain (as permanent deformations) after the discontinuance of the stresses, with the result that certain strains are induced in the piece. If the piece is reheated, these strains tend to release themselves within the piece which resumes its original form. This property of the PTFE is commonly indicated as "plastic memory" and is made use of in different applications.

Also most of the semi-finished products, because of the transformation processes, possesses similar strains, to a certain degree. When it is desired to obtain semi-finished parts dimensionally stable at high temperatures, it is possible to subject the parts to a temperature of 280°C for one hour every 6 mm of thickness and then cool them slowly. The parts obtained in this manner are almost completely free from internal strains and are in general known as "conditioned" or "thermostabilised" material.

Hardness -The hardness Shore D, measured according to the method ASTM D 2240, has values comprised between D50 and D60. According to DIN 53456 (load 13,5 Kg for 30 sec) the hardness sways between 27 and 32 N/mm2.

Friction -PTFE possesses the lowest friction coefficients of all solid materials; between 0.05 and 0.09:

* the static and dynamic friction coefficients are almost equal, so that there is no seizure or stick-slip action
* when increasing the load, the friction coefficient decreases until reaching a stable value
* the friction coefficient increases with the speed
* the friction coefficient remains constant at temperature variations.

Wear -The wear depends upon the condition of the other sliding surface and obviously depends upon the speed and loads. The wear is considerably reduced when adding suitable fillers to the PTFE (see filled PTFE).
Electrical properties

PTFE Insulation -PTFE is an excellent insulator and precious dielectric as shown by the relative data reported in datasheet and maintains these characteristics throughout a large range of environmental conditions, temperatures and frequencies.

Dielectric strength -The dielectric strength of PTFE varies with the thickness and decreases with increasing frequency. It remains practically constant up to 300°C and does not vary even after a prolonged treatment at high temperatures (6 months at 300°C). It depends also upon the transformation processes.

Dielectric constant and dissipation factor -PTFE has very low dielectric constant and dissipation factors values; these remain unvaried until 300°C, in a frequency field of up to 109 Hz even after a prolonged thermal treatment (6 months at 300°C). The dielectric constant, dissipation factor as well as the volume resistivity and surface resistivity, considered as being independent from the transformation processes.

Arc-resistance -PTFE has a good resistance to the arc. The arc resistance time according to ASTM D 495 is 700 sec..
After a prolonged action there are no signs of surface charing.

Corona effect resistance -The discharges caused by the corona effect may result in erosions of the PTFE surface which, nevertheless, is indicated as a suitable insulator in case of high potential differences.
Surface properties

The molecular configuration of PTFE brings to its surfaces a high anti-adhesiveness. For the same reason these surfaces are hardly wettable, the contact angle with water is about 110° and it is possible to affirm that, beyond a surface tension of 20 dine/cm, the liquid no longer wets the PTFE. A special etching treatment renders the surfaces bondable and wettable.

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PTFE Lined Pipe

PTFE lined pipe provides unmatched chemical resistance at temperatures to 260ºC. Because its carbon chains are completely fluoronated, PTFE is chemically inert to the following broad range of commercial chemicals:

• All acids including hydrofluoric, hydrochloric, sulphuric and aqua regia
• Chlorides - organic and inorganic
• Sulphates - organic and inorganic
• Bleach solutions
• Solvents
• Phenols
• Caustics
• Peroxides

Combined with the chemical inertness of PTFE are its usual non stick properties. Thus a PTFE lined pipe system eliminates and/or minimises build up of deposits on the pipe walls, which otherwise would reduce flow and possibly affect processing operations.

PTFE Lined Pipe for chemical resistance at extreme temperatures

• Size range - 25 - 300 NB
• Steel Pipe - Welded or seamless, schedule 40
• Flanges - Any speciation (ASA 150lb STD)
• Pressure - As per steel pipe recommendation
• Max Temp - 230ºC
• Exterior Finish - Primer (ROZC) or as specified
• QA to ASTM requirement
• Dye Penetrate Test
• Welding Certificates (WPS / PQR)
• Spark Test / Electrostatically
• NDT Test
• Hydrostatic Test
• Material Certification

PTFE lined pipe is suitable for water, acid, chemical, food, mining, petroleum, gas, medical and energy applications.

PTFE Lined Pipe and Fittings

Use PTFE lined piping in any application where superior chemical resistance is required. Compared to other plastic pipe lining, PTFE has been proven to reduce permeation rates by up to 60%. It is also far more resistant to corrosion and high temperatures, and it features a full vacuum rating up to 450°F.

As a result, PTFE lined pipe and fittings are ideal for severe service applications, including pulp and paper processing, and power generation. Compared to exotic alloy materials or glass lining, PTFE is an economical choice that gets the job done right.

ptfe lined pipe, teflon lined fittings

Our PTFE lined & jacketed steel dip pipes and spargers are manufactured to the highest standards in the industry. All units are given extreme stress tests to validate their integrity and ensure long life.

PTFE is one of the most versatile materials used for lined pipe and fittings. It is near-universally chemically resistant and capable of withstanding temperatures as high as 450°F (230°C), making it ideal for handling nitric acid, oleum, nitrobenzene and other fluids used in industrial and manufacturing processes.

Choose a PTFE pipe fitting for pharmaceutical, food and beverage, and other applications where performance can’t be sacrificed in the name of cost savings.