PTFE (teflon) coating

PTFE high performance special coating is based on polytetrafluoroethylene resin fluorocoating, the English name is Teflon, because of the pronunciation, often called Teflon and so on (all for Teflon translation). PTFE (teflon) coating is a unique high performance coating, combining heat resistance, chemical inertia, excellent insulation stability and low friction, with comprehensive advantages that no other coating can compete with, its application flexibility makes it can be used in almost all shapes and sizes of products.

Teflon is divided into PTFE, FEP, PFA and ETFE basic types:

· Teflon PTFE: PTFE (Polyfluortetraethylene) non-stick coating can be used continuously at 260℃, with maximum operating temperature of 290-300℃, extremely low friction coefficient, good wear resistance and excellent chemical stability.

· Teflon FEP: FEP (Ethylene fluoride propylene copolymer) non-stick coating forms non-porous film in the melting flow during baking, with excellent chemical stability and excellent non-stick characteristics, and the maximum operating temperature is 200℃.

· Teflon PFA: PFA (Perfluoroalkylate) nonstick coating, like FEP, forms nonporous film by melting flow during baking.PFA has the advantage of higher continuous service temperature of 260℃ and stronger toughness, especially suitable for use in the field of anti-viscosity and chemical resistance at high temperature.

· Teflon ETFE: ETFE is a copolymer of ethylene and tetrafluoroethylene. The resin is the strongest fluoropolymer and can form a highly durable coating with excellent chemical resistance and can work continuously at 150℃.

After coating with teflon, it has the following characteristics:

1, Non-viscosity: almost all materials do not bond with PTFE film.Very thin film also shows good non - adhesion properties.

2, Heat resistance: PTFE coating film has excellent heat and low temperature resistance characteristics.It can withstand high temperature to 300℃ in a short time and can be used continuously between 240℃ and 260℃ in general. It has remarkable thermal stability. It can work at freezing temperature without embrittlement and without melting at high temperature.

3, Sliding: PTFE coating film has a lower friction coefficient.The friction coefficient changes when the load slides, but the value is only between 0.05 and 0.15.

4, Moisture resistance: PTFE coating surface does not stick to water and oil, and it is not easy to stick to solution during production operation. If there is a small amount of dirt, it can be removed simply by wiping.Short downtime, save time and improve work efficiency.

5, Wear resistance: under high load, with excellent wear resistance.Under a certain load, it has the double advantages of wear resistance and non-adhesion.

6. Corrosion resistance: teflon is almost impervious to drugs and can protect parts from any kind of chemical corrosion.

Ptfe is a polymer of tetrafluoroethylene.The abbreviation is PTFE. It's called teflon. It is known as the "king of plastics".The basic structure of ptfe is. - cf2-cf2-cf2-cf2-cf2-cf2-cf2-cf2 - ptfe is widely used in a variety of acid and alkali resistance and organic solvents, it is not toxic to humans, but perfluorooctanoic acid ammonium (PFOA), one of the raw materials used in the production process, is thought to have carcinogenic effects.

Introduction of ptfe welding process

Steel lined ptfe equipment is usually made with discharge port, feed port, perspective mirror, etc., but how to successfully apply this kind of pipe port in the complex head intersecting line, of course, our answer is welding, then how to welding?How to control the temperature of ptfe welding?Below we tell one by one.

1, ptfe head pipe mouth production

PTFE pipe welding on sealing head to first of all, we should make PTFE sealing head nozzle, according to the size of the nozzle diameter steel head and according to certain proportion by using powder moulding process manufacturing nozzle, 8 hours of sintered under the 380 plus or minus 5 degrees Celsius, after the completion of the sintering good nozzle with lathe car to the right size, to the congratulations of PTFE tube at this moment you have finished.

2, ptfe head opening

Put the extracted head into the steel head, and use the principle of light transmission to accurately open the head, pay attention to the ptfe head must be consistent with the steel head, or the final equipment is prone to bulge, rupture and other potential hazards.

3, ptfe pipe mouth welding

By the first two steps, we can carry out PTFE welding. Here we know that there are two ways of welding (hot pressure welding and hot air welding). We will explain them one by one.

(1) hot pressure welding

Before hot pressure welding we should know the necessary theoretical knowledge, hot pressure welding is a kind of hot welding, provide sufficient heat and enough pressure.Here, we must ensure that the welding interface temperature must reach 673.15k and the pressure reaches 1-2mpa. Therefore, in order to ensure the welding, we need to make corresponding molds to ensure the successful completion of the thermal pressure welding.When all is done, the FEP film can be welded by pressurizing and heating the interface between the nozzle and the head.

(2) hot air welding

Similarly, ptfe hot air welding is a kind of hot welding, which is much simpler than hot pressure welding and does not require so many molds. After placing the pipe mouth, PFA welding rod and hot air welding gun higher than 713K are used to preheat PFA first and then place it on the welding seam for continuous welding.

Note: whether it's hot pressure welding or hot air welding welding temperature will be higher than the melting point of ptfe, ptfe is possible under the temperature cracking, produces in the process of pyrolysis perfluorinated isobutylene and other poisonous gases, so the welding should be in a ventilation environment, when the condition does not allow such as the four fluorine lining tank welding in production must use the fan air supply air flow assurance and wearing a gas mask to ensure security at the same time.

Introduction to seal gasket

With the advent of mechanization era, a variety of machinery and equipment emerge in endlessly, in a variety of mechanical equipment, sealing gaskets become unnecessary parts, is the industrial production enterprises and related industries to solve the gas, liquid medium "run, run, drip, leakage", root cure leakage effective tools.

As the name suggests, the seal gasket is a seal, mainly play the role of sealing, it is generally used for machinery, equipment, pipelines and other places where there is a fluid through.Used for connection between pipes or parts of equipment.

Popular at present, the market of sealing gaskets are metal or nonmetal after cutting, stamping or tailor made after processing, such as the common have high pressure asbestos rubber gasket, oil resistant rubber gasket, cylinder gasket, aramid fiber gasket, asbestos gasket, asbestos gasket, rubber mat and so on seven big classes, different material sealing gasket its specific applicable environment is different also, if the gasket failure, not only affects the operation of equipment, sometimes even cause an accident, a threat to the personal and property of people.

Relevant data shows that different gaskets have their national standards are different, in quality, density, corrosion resistance, lubricity resistance, oxidation resistance and other aspects of strict requirements, as long as all the parameters to achieve national standards, before entering the market.

Sealing gasket is commonly used in ptfe gasket, with good flexibility, compression resilience, creep resistance, high and low temperature resistance and excellent corrosion resistance, aging resistance, self-lubrication.With its very low leakage rate and excellent heat resistance and radiation resistance, and at the same time very convenient installation and use, is the chemical industry, medicine, petrochemical, food and beverage, electronics, power, metallurgy, shipping and other industries extremely ideal sealing material.

Teflon Rod Bar Dia 1",Ptfe Plastic Rod

PTFE is High molecular weight polymer composed by Carbon and Fluorine based on the polymeric chain -CF2=CF2-. This material is a soft, low friction fluoropolymer with outstanding chemical resistance and weathering resistance.
Mechanical properties can be improved by adding fillers such as glass fibers, bronze, carbon, and graphite.

PTFE is one of the most versatile plastic materials known and can be used for applications where other materials can't be used. The compressive strength at a certain predetermined compression value is one of the most significant mechanical characteristics of PTFE, in a wide range of service temperatures.

Its mechanical properties are low compared to other engineering plastics, but its properties remain at a useful level over a great temperature range (-400° to 500° F).

• Material: PTFE Teflon
• Shape: Rod
• Diameter: 1 inch
• Length: 24 inches
• Finish: Smooth
• Product Weight: 1.60 lbs

100 PTFE / Teflon spacers/washers, 5 / 2 / 0.5mm

For sale 100 PTFE / Teflon washers/spacers

Dimensions:

• 5mm external diameter  (  a little over 3/16 "  )
• 2 mm inside diameter  ( 5/64 inch) 
• 0.5 mm thickness  ( 1/64 inch)
• Made from teflon sheet, these washers can be made larger if needed, but only in 0.5mm thickness.

PTFE is a thermoplastic polymer, which is a white solid at room temperature, with a density of about 2200 kg/m3. According to DuPont, its melting point is 600 K (327 °C; 620 °F).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.

Black 1/2 Inch Standard Flex PTFE Convoluted Tubing

This PTFE tubing delivers superior performance when it comes to managing cables in harsh environments. High heat, abrasion, moisture, and chemicals are no match. Choose between standard for straight runs and extra flexible for more complex routing. This tubing looks especially great under the hood of your high performance vehicle, but your cables will love it anywhere.(Contact us please click website:www.sukoptfe.com)

Property	Value
Dielectric Strength	14V per mil
Operating Temperature	-454° to 500° F [-270° to 260° C]
Limiting Oxygen Index	>95
Rating	MIL-T-81914 (/2 standardard flex, /2 extra flex) FDA Approved USP Class VI approved ETO & Autoclave Sterilizable UL 94 V-0

Standard Flex PTFE Convoluted Tubing

Size	Max. I.D.	Min. I.D.	Max. O.D.	Max. Wall Thickness	Conv/Inch +/- 1	Weight (LBS) Per CFT Maximum	Min. Bend Radius
3/16"	0.188	0.181	0.3	0.023	8	2	0.5
1/4"	0.281	0.273	0.414	0.027	7-1/2	2.9	0.75
5/16"	0.312	0.303	0.45	0.027	7-1/2	3.6	0.875
3/8"	0.375	0.364	0.53	0.029	7	4.2	1
7/16"	0.437	0.425	0.59	0.029	7	4.9	1.25
1/2"	0.5	0.485	0.66	0.029	7	5.2	1.5
5/8"	0.625	0.608	0.78	0.035	7	6.9	1.75
3/4"	0.75	0.73	0.975	0.035	6	10.4	1.875
7/8"	0.875	0.85	1.1	0.035	6	11.3	2.25
1"	1	0.975	1.26	0.035	4-1/2	12.6	2.5
1-1/4"	1.25	1.21	1.539	0.035	4	15.5	3
1-1/2"	1.5	1.44	1.85	0.04	4	21.7	3.75
2"	2	1.94	2.35	0.045	4	29	4.75

Extra Flex PTFE Convoluted Tubing

Size	Max. I.D.	Min. I.D.	Max. O.D.	Max. Wall   Thickness	Conv/Inch +/- 1	Weight (LBS) Per CFT Maximum	Min. Bend Radius
3/16"	0.188	0.181	0.32	0.023	10	2.2	0.313
1/4"	0.281	0.273	0.414	0.026	9	3.8	0.438
5/16"	0.312	0.306	0.45	0.027	9	4.8	0.438
3/8"	0.375	0.364	0.53	0.029	9	5.6	0.5
7/16"	0.437	0.427	0.59	0.029	9	6.5	0.5
1/2"	0.5	0.485	0.66	0.029	9	6.9	0.75
5/8"	0.625	0.608	0.78	0.029	9	9.2	0.75
3/4"	0.75	0.73	0.975	0.035	8	13.8	0.938
7/8"	0.875	0.86	1.1	0.035	8	15	0.938
1"	1	0.975	1.26	0.035	7	16.8	1.125
1-1/4"	1.25	1.21	1.539	0.035	6	19.6	1.125
1-1/2"	1.5	1.45	1.81	0.038	6	26	2