Polytetrafluoroethylene (PTFE) resin, commonly known as the ""Plastic King,"" is widely used in various industries due to its unique properties. The PTFE plastic possesses high-temperature resistance, non-oxidizing and non-dissolving characteristics, exceptional chemical stability, and excellent dielectric properties, making it an indispensable material in industries primarily focused on chemistry and mechanics. Machining PTFE resin is typically in the form of powder or dispersion, with a high molecular weight (8.88×106 to 3.17×107) and high crystallinity (92% to 98%). The PTFE plastic sheet has a melting point of 327°C and contains strong F-C bonds in its molecular structure.

Items	Features	Descriptions
Properties	Chemical Resistance	The PTFE plastic is inert to most commonly used chemicals, except for reactions with molten sodium metal, fluorine, strong fluorinating agents, and sodium hydroxide above 300°C.
	Heat Resistance	The PTFE plastic sheet does not undergo thermal aging below 260°C.
	Electrical Properties	The machining PTFE has excellent electrical insulation properties, high arc resistance, a volume resistivity greater than 1×1016Ω·m, and is not affected by temperature variations.
	Lubricity	The custom PTFE has a low friction coefficient within a wide temperature range.
	Radiation Resistance	The Teflon CNC retains 50% of its original tensile strength even at maximum irradiation doses in a vacuum.
	Low Permeability	The PTFE CNC exhibits low permeability to most gases and liquids, except for fluorocarbon compounds with similar compositions.
	Weather Resistance	The laser cutting Teflon is unaffected by climatic conditions and can withstand exposure for over 10 years.
	Non-Flammability	The cutting Teflon has an oxygen index exceeding 90.
	Non-Adhesive	Virtually all adhesive substances do not stick to their surface.
	High And Low-Temperature Resistance	It can be used within a temperature range of -250°C to 250°C. Due to its exceptional properties, PTFE is often referred to as the "Plastic King" and finds widespread applications in defense, aerospace, petrochemical, electronics, mechanical, and various other industries.
Characteristics	Low Cutting Forces, Poor Thermal Conductivity, And Heat Resistance	During PTFE CNC machining, the cutting forces are approximately six to seven times smaller than those for metals. However, due to its low thermal conductivity and lower heat resistance compared to metals, the cutting speed needs to be reduced to prevent plastic softening and tool sticking.
	Non-Uniform Structure And Strength	Plastics consist of multiple components and their molecular structures exhibit various patterns, resulting in non-uniformity that hampers machining. Therefore, sharper and more wear-resistant cutting edges are required for PTFE laser cutting tools.
	C. Severe Tool Wear And Susceptibility To Brittle Cracking	PTFE machined parts often contain various fillers and additives, such as glass fibers, which make them challenging to machine. Tools wear quickly, and after tool blunting, cracking, and edge chipping can occur under high extrusion forces.
	High Thermal Expansion Coefficient	The thermal expansion coefficient of plastics is three to four times higher than that of metals, affecting dimensional stability and posing challenges in cutting operations.
	Difficulty In Chip Formation	During PTFE turning and drilling operations, the chips formed from custom PTFE tend to be stringy, clinging to the tool and getting compressed together, which adversely affects the machining quality.

Machining method

PTFE is a polymer material that usually requires the use of professional mechanical equipment for processing. The following are several common machining methods.

1. Turning

Turning is a machining method used to make round parts. Turning PTFE using a lathe allows the creation of cylindrical parts of varying diameters and lengths.

When turning PTFE plastic, the following should be noted:

- Use appropriate turning tools. Because custom PTFE has high softness and good plastic deformation ability, it is recommended to use arc-shaped tools.

- Control the feed rate and rotational speed of turning tools. The processing temperature of PTFE plastic sheet should be as low as possible because its melting point is as high as 327°C and it is easy to burn and decompose.

- Chip handling. PTFE chips tend to get tangled, so you can use special chip cleaning equipment or clean them manually.

2. Milling

PTFE milling is a machining method that can produce parts of various shapes. It can produce parts of various shapes such as planes, curves, edges, etc., and is suitable for the production of small batches of parts.

When milling PTFE, the following should be noted:

- Use a suitable milling cutter. It is usually recommended to use an end mill or ball nose cutter.

- Control feed rate and rotational speed. The processing temperature of PTFE plastic should be as low as possible. Controlling the feed speed and rotation speed can reduce the processing temperature.

- Chip handling. Just like turning, use special chip cleaning equipment or clean it by hand.

3. Drilling

Drilling is a machining method for processing circular holes, which is suitable for manufacturing PTFE pipes, valves and other parts that require holes.

When drilling holes in custom PTFE, the following should be noted:

- Use a suitable drill bit. It is recommended to use a sharp angle drill bit or a grinding wheel drill bit.

- Control feed rate and rotational speed. When drilling, excessive acceleration should be avoided to avoid quality problems such as melting and annealing of the teflon CNC material.

- Chip handling. To prevent excessive chips when drilling, it is recommended to use special chip cleaning equipment or clean them manually.

Precautions

- The PTFE CNC machining involves high temperatures, so safety precautions must be taken.

- Mechanical shock and vibration should be minimized during processing.

- Ensure that machine tools and tools are kept in good condition to avoid excessive heat and friction.

- Before cutting, make sure that the density of the PTFE plastic material is uniform and there are no bubbles, impurities and other quality problems.

PTFE material has high temperature resistance, no oxidation, no dissolution, particularly good chemical stability and excellent dielectric properties, and the machining PTFE is widely used in the following industries:

Flourish Legend is a plastic machining company specializing in the research, production, sales, and service of PTFE plastic pipes, rods, sheets, films, and non-standard components. Our main products include:

Pipe Series: PTFE PTFE CNC polytetrafluoroethylene pipes, FEP pipes, PFA pipes, PVDF pipes.
Heat Shrinkable Tubing Series: Custom PTFE heat shrink tubing, FEP heat shrinkable tubing, PFA heat shrinkable tubing, PVDF heat shrinkable tubing.
Plate, Rod, And Film Series: PTFE machining sheets, rods, and films, FEP sheets, rods, and films, PFA sheets, rods, and films, PVDF sheets, rods, and films.
Insulation Material Series: Silicone, PE, PVC, UPE, and more.
Special Products: Imported PFA connectors, spiral pipes, spring pipes, spiral-cut pipes, welding rods, tees, straight connectors, gaskets, adapters, taper bars, expansion pipes, sealing pipes, braided pipes, corrugated pipes, and more.

We also offer customized CNC machining production of various specifications according to customer requirements. Feel free to contact us for inquiries and consultations.

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