Polytetrafluoroethylene Tubing
What is Polytetrafluoroethylene Tubing
Polytetrafluoroethylene tubing is a semi-transparent, chemically inert, and non-toxic material that features unmatched temperature resistance and a surface that facilitates the flow of fluids. Polytetrafluoroethylene tubing are used applications requiring resistance to high temperatures, corrosive chemicals, and high voltages.As such, it finds use in fluid transfer applications, cabling, and heat-exchanger systems.Polytetrafluoroethylene can be used in service temperatures of up to 260℃, making it a material of choice in high temperature applications. It also has a breakdown voltage of up to 100Kv/mm, making it ideal in electrical insulation.It is often used in applications where chemical resistance and high temperature tolerance are required, such as in laboratory equipment and chemical processing plants. Polytetrafluoroethylene tubing is also often used in the food and beverage industry as well as in electrical insulation applications. It is also known as Teflon tubing. It also has a low coefficient of friction and is self-lubricating, making it ideal for use in applications where movement or flow is involved.
Advantages of Polytetrafluoroethylene Tubing
Chemical resistance
One of the primary benefits of using polytetrafluoroethylene tubing is their exceptional chemical resistance. Polytetrafluoroethylene is highly resistant to a wide range of chemicals, including acids, bases, and organic solvents. This makes it an ideal material for use in applications that involve the handling of corrosive liquids or gases. For example, polytetrafluoroethylene tubing are commonly used in the chemical and pharmaceutical industries for the transport of corrosive fluids.
Temperature resistance
Another major benefit of polytetrafluoroethylene tubing is their high-temperature resistance. Polytetrafluoroethylene tubing can withstand temperatures up to 260℃, making them suitable for use in high-temperature environments such as furnace linings, heat exchangers, and ovens. Furthermore, polytetrafluoroethylene tubing have a low coefficient of thermal expansion, which means that they maintain their shape and size at high temperatures. This makes them an ideal material for use in applications that involve high-temperature changes, such as thermal cycling.
Low friction
Polytetrafluoroethylene tubing also offer low friction properties, which make them an excellent choice for use in applications that require low-friction movement. For example, polytetrafluoroethylene tubing are commonly used in the production of bearings and bushings, as they reduce the potential for wear and tear on the moving parts. Additionally, polytetrafluoroethylene tubing are used in the production of seals, gaskets, and o-rings, as they reduce the potential for leaks and spills.
Resistance to ware and tear
Polytetrafluoroethylene tubing are also highly resistant to wear and tear, which makes them an ideal material for use in applications that involve high mechanical loads. Polytetrafluoroethylene tubing have a high compressive strength and a low coefficient of friction, which means that they can withstand high mechanical loads without deforming or wearing out. This makes them an ideal material for use in applications such as gears, cams, and bushings.
Why Choose Us
Our factory
The factory is located in Yancheng, the beautiful coast of the Yellow Sea. Founded in 2007, it has 150 sets of special equipment and 100 special pipelines. The factory continues to operate in ISO9001:2000 quality system.
Advanced technology
With strong technical force, there are more than 20 middle and senior technicians in undergraduate and junior colleges. The design adopts the most advanced Japanese technology, and the research and development speed is fast, which can meet the various needs of customers.
Wide range of applications
The pipes produced by Tongtong are mainly used in the fields of machinery, chemical industry, aviation, electrical and electronics, national defense industry, cutting-edge technology, medical and electrical insulation and electrical insulation.
Our produce
The existing PTFE tubes, PTFE Plates , PTFE gaskets, PTFE Fittings and Equipments, and has the ability to develop and produce various PTFE products. Excellent products are praised by customers at home and abroad.
Polytetrafluoroethylene Tubing Processing Techniques
The uniqueness of polytetrafluoroethylene tubing rests in the complexity of polytetrafluoroethylene as a polymer. While most polymers lend themselves easily to injection moulding allowing them to be made into complex shapes, polytetrafluoroethylene due to its high melting point and melt viscosity can only be compression moulded. The high melting point of polytetrafluoroethylene also means that extrusion as conventionally practiced cannot be applied to it. Polytetrafluoroethylene paste extrusion has therefore become a process which is increasingly sought after given the growing demand for ptfe tubing.
Mixing: The resin comes in a powder form with an average particle size of about 0.2µm. The powder is waxy and prone to bruising and mechanical shear fibrillation. Hence handling must be careful and done typically at a temperature of around 20°c. While standard compression moulding only requires that the powder be sieved thoroughly and then compressed, in paste extrusion the powder must be first mixed with a hydrocarbon extrusion aid or mineral spirits. The powder-spirit mixture is left in a sealed container before it is used in the next process
Pre-form: The pre-form is a billet made by compressing the mixture in a hydraulic press. A standard 30kg billet would take approximately 2 hours to mould, following which a dwell time is necessary to ensure any excess air pockets get released
Extruding: The pre-form is loaded into the extruder – the key equipment in the process – and a die and mandrel are clamped in place above it. The die is a critical tool and its design defines the strength of the tube and its final dimensions. As the extrusion process starts, the extruder presses the pre-form against the die and mandrel, forcing the resin to extrude into the desired shape. The tubing in this stage is referred to as ‘green' and can be easily crushed.
Pre-sintering: The green tubing is passed through an oven where it is heated at a very low temperature. The idea here is to evaporate the spirit in the tube and care must be taken so that the flash point of the spirit is not reached, causing it to ignite.
Sintering: The polytetrafluoroethylene tubing is sintered at 350-400℃. The sinter cycle will depend on the thickness of the tubing and can last up to 24 hours for thick walled tubing
Cleaning and packaging: The tube is first cut into he desired lengths. In the case of medical tubing, the ends of the tube must be plugged as soon as the material comes out of the oven. The plugging ensures that the inside of the tubing – which has seen temperatures well in excess of 300℃ – remains clean. For further cleaning an iso grade vi clean room is the minimum requirement for polytetrafluoroethylene tubing. After the cleaning the tubes are packed in polythene covers for dispatch.
Medical Industry
Fluoropolymer medical tubing, including polytetrafluoroethylene tubing, offers many benefits to the health sector, such as improvement of safety measures. Liquids roll off PTFE materials and are capable of withstanding chemicals, as well as being highly biocompatible, making them useful with the human body. PTFE tubing is used for several purposes in the medical industry, such as the transmission of oxygen and blood to patients, as well as the making of catheters.
Automotive Industry
Polytetrafluoroethylene tubes can be used for the transfer of fuel, oil, gas, and water. While all kinds of tubing can support water transfusion, not all of them are compatible with fuel, oil, and gas. But polytetrafluoroethylene tubes perform adequately without any negative effects.
Food and Beverage Industry
It can be used to deliver all kinds of liquid and gaseous ingredients needed during food preparation. Aside from ingredients, chemicals are often added to food and beverages to serve as preservatives. polytetrafluoroethylene tubes are used to do this.
Chemical Industry
In chemical applications like laboratories, polytetrafluoroethylene is used in place of glass because of its inertness and durability. polytetrafluoroethylene tubing guarantees high functionality regardless of the toxicity of the chemicals.
Electrical Industry
Thanks to polytetrafluoroethylene excellent dielectric properties, it's used for insulating high-voltage cables. Also, it is used as a cable sheath to protect operators and maintenance personnel from any harm that could result from handling electrical components.
Source: The best can only be gotten from a reliable polytetrafluoroethylene manufacturer with a valid number of years of operation and a reputation to uphold. Due to the rising need for polytetrafluoroethylene tubing, many producers are on the market, but not all of them are capable. So, do the necessary findings, such as their manufacturing process and the regulatory standards they comply with in order to make an informed decision.
Fit: This factor consists of the tube's wall thickness and diameter. Depending on each need, there are suitable PTFE tubes. For minimum wall thickness and diameter, the polytetrafluoroethylene tube is the best. For medium wall thickness and diameter, polytetrafluoroethylene hoses are the best. And for maximum wall thickness and diameter, polytetrafluoroethylene sleeves are most appropriate.
Application: The different types of polytetrafluoroethylene tubing are specifically designed for different purposes. The polytetrafluoroethylene tubing is best for medical and automotive applications. Polytetrafluoroethylene hoses are most suitable for applications that require high-burst pressure and heavy insulation. And the polytetrafluoroethylene sleeves are most appropriate for insulation, corrosion resistance, lubrication, and load-bearing needs.
Filler: Several types of fillers can be used with polytetrafluoroethylene tubing. They are explained below:
Glass fillers: They have superior wear resistance, reduced creeping rate, and high compression strength, making them also perfect for hydraulic piston rings. Also, glass fillers possess high compressive strength, ensuring that the tubing doesn't get distorted over time.
Carbon fillers: They improve the performance of polytetrafluoroethylene tubes in various ways, which includes improved compression strength, wear resistance, toughness, heat conductivity, and lower absorbency.
Graphite fillers: They offer the same benefits as carbon fillers, but they don't enhance wear resistance in the same way. However, graphite fillers have superior self-lubricating properties and a low friction coefficient.
Bronze fillers: Polytetrafluoroethylene tubes that have this are perfect for applications that demand high thermal and electrical conductivity. They also improve wear resistance but reduce the polytetrafluoroethylene non-stick qualities and chemical inertness.
Types of Polytetrafluoroethylene Tubing
The smooth bore hose consists of a straight polytetrafluoroethylene tubing lining and a stainless steel outer braid. It is the basic ptfe hose design successfully used in many automotive and general applications.
Hose braid: Braided by 304/316 stainless steel wire. The braiding process is strictly controlled to ensure uniform tension and correct braiding angle to minimize expansion/contraction under pressure.
Corrugated inner hose: The polytetrafluoroethylene bellows includes a corrugated polytetrafluoroethylene tubing lining and a stainless steel outer braid. It is made by special blow molding. It is made by heating the polytetrafluoroethylene tubing to a certain temperature in a certain mold, and giving a certain internal pressure in the pipe to expand (inflate) the pipe horizontally and then cooling and shaping. Bellows have the inherent properties of ptfe, and also have high flexibility and elasticity, but the pressure is lower than that of polytetrafluoroethylene straight tubing.
Hose braid: Braided by 304/316 stainless steel wire. The braiding process is strictly controlled to ensure uniform tension and correct braiding angle to minimize expansion/contraction under pressure.
In order to meet other requirements, some customers will cover the stainless steel wire braid with another layer. The materials include but not limited to PU, PVC, glass fiber, silicone, polyester, cotton yarn (thread), aramid, etc.
How to Identify Quality Medical Grade Polytetrafluoroethylene Tubing
Dimensions: Make sure to check the size of your tubes and other related components, such as connectors and fittings.
Make sure to pay attention to the details when choosing medical grade polytetrafluoroethylene tubing. The inner diameter (ID) and outer diameter (OD) of the tube, as well as its wall thickness, are all key factors to consider. You should choose an inner diameter that is suitable for your particular application, and ensure that the wall thickness is compliant with regulations. Additionally, you have to check if the dimensions of the tube match up with those of other components such as end fittings and connectors. Compatibility issues can cause costly delays further down the line.
To ensure a secure and leak-proof connection with your fitting or connector, it is essential to find the right size of Thin Wall polytetrafluoroethylene tube. This is important for ensuring safety and accuracy in medical applications. The wall thickness also has an impact as tubing with thinner walls tends to be easier to work with — making them ideal for tight spaces or connecting to miniature components. However, take care when using such products as they may not be able to perform sufficiently in hazardous applications. Be sure to confirm that a thin wall polytetrafluoroethylene tube fulfills the FDA's standards before you use it in any critical environment.
Certification Standards: Are the parts up to safety standards for medical equipment?
Before purchasing medical grade polytetrafluoroethylene tubing, you must make sure that the part meets industry standards. ISO 10993–1 should be used to check that the material and manufacturing processes meet safety standards for biocompatibility. UL 94V0 should determine flame resistance, while EN 4593 outlines requirements related to use in medical electrical equipment. Additionally, if the polytetrafluoroethylene tubing is intended for use with human tissue, FDA regulations can tell you about any approved materials for safe contact surfaces.
Material: Ensure that you're selecting premium quality polytetrafluoroethylene that's suited for medical applications with certain chemical-resistant characteristics.
When buying medical grade polytetrafluoroethylene tubing, look for superior grades of tubing with a composition that contains very low levels of extractables as well as a high molecular weight and pressure rating. A quality material should also be resistant to punctures, abrasions, and tears, making it the ideal choice for sterile medical processes.
Testing Methods: Ask about any testing processes that have been used to guarantee product quality, such as tensile strength or pressure testing methods.
In addition to checking the raw materials used in tubing production, it's a good idea to ask what type of testing methods have been used to ensure product quality. Typically, these tests will measure the tensile strength of the tubes and include some kind of pressure test to make sure that they can withstand certain forces without breaking or leaking. Ask for product certificates that outline any testing results for further assurance of the polytetrafluoroethylene tube's quality before purchase.
If the polytetrafluoroethylene tubing is marked as “medical grade,” be sure to ask for any FDA approval documents. Since medical grade polytetrafluoroethylene tubes are designed for use in sensitive and critical applications, additional testing and certification might be needed to show that they comply with accepted safety regulations. For thin wall polytetrafluoroethylene tubes, keep an eye out for burst pressure tests that make sure the walls won't rupture or break down over prolonged usage.