High Temperature PTFE Polytetrafluoroethylene Sheet

7 month ago

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Foshan Anheda New Material Co., Ltd

8 month

Product details

White Color PTFE Sheet 100% Virgin Gasket Material

Molecular structural characteristics of PTFE

(1) Extremely strong chemical inertness

Fluorine atoms have extremely high electronegativity and form extremely strong C-F bonds with carbon atoms (bond energy up to 485 kJ/mol), which is one of the strongest known single bonds;

The outer layer of the molecular chain is "wrapped" by dense fluorine atoms, forming a "fluorine shield" structure, which almost isolates it from any possible corrosion from external substances (acids, alkalis, solvents, oxidants).

(2) Extremely low surface energy

PTFE has a surface energy of only 18~20 mN/m, making it one of the most non-sticky and least wettable materials among known solid materials;

Water, oil, and most liquids hardly wet or adhere to its surface, which is the fundamental reason for its "non-stick" property.

(3) Extremely wide temperature range

Long-term operating temperature: -200°C ~ +260°C

Short-term resistance can even reach above 300°C

Maintains good physical and chemical stability in both extreme cold and extreme hot environments

(4) Excellent electrical insulation

Volume resistivity >10¹⁸ Ω·cm, high dielectric strength, ideal for high-frequency and high-voltage insulation materials

PTFE Plate

Product Advantages

Absolute Corrosion Resistance

PTFE sheet's complete chemical inertness makes it the only reliable choice for applications involving highly corrosive media. For example:

• Chemical plant reactor linings: Linings (3-5mm thick) of steel vessels used for the storage or reaction of concentrated sulfuric acid (98%), hydrofluoric acid (40%), and aqua regia (a mixture of hydrochloric acid and nitric acid). PTFE sheet provides long-term corrosion resistance (service life > 10 years) and prevents vessel perforation and leakage.

• Pipe and valve seals: Gaskets (cut from PTFE sheet) used in pipe flanges transporting strong alkalis (such as sodium hydroxide solution, concentration > 50%) and organic solvents (such as acetone and benzene) resist swelling and provide a long-lasting seal (no risk of leakage).

• Wastewater treatment equipment: Filter plates or tank linings exposed to high concentrations of chloride ions (such as desalinated brine) or heavy metal ions (such as electroplating wastewater). PTFE sheet exhibits no chemical reaction, ensuring long-term, stable operation of the equipment.

Ultra-Low Friction - Self-Lubricating

F4 sheet's extremely low coefficient of friction (dry friction 0.04-0.1) and self-lubricating properties (no lubricant required) make it an ideal choice for applications requiring minimal friction loss. For example:

• Bearings and Guides: Used in low-speed bearings (such as conveyor rollers) and precision guides (such as auxiliary layers for linear guides in CNC machine tools) in food processing and packaging equipment, PTFE sheet can be used directly as a sliding surface (replacing metal-to-metal friction), reducing energy consumption (saving 10%-15%) and achieving zero wear (service life > 5 years).

• Seals and Gaskets: Dynamic seals in mechanical equipment (such as rotating shaft seals) and reciprocating seals (such as cylinder piston seals). PTFE sheet's flexibility (slightly deforming to fill gaps) and low friction properties reduce wear (seal life > 3 years).

• Conveying Systems: Used as anti-slip linings (or guide slides) between conveyor belts and pulleys. PTFE sheet's low friction ensures smooth material conveying (reducing jamming) while also being wear-resistant (resisting particle scraping).

ptfe plastic

Wide Temperature Range Stability

PTFE roll sheet's wide temperature range, from -200°C to +260°C, enables it to maintain stable performance in both extreme cold and high-temperature environments. Examples include:

• Aerospace: Sliding components in satellite antenna deployment mechanisms (no brittle cracking at -100°C), high-temperature gaskets in rocket fuel lines (no softening or leakage at 260°C);

• Cryogenic Equipment: Liquid nitrogen tanks (-196°C), support structures for superconducting material experimental devices (PTFE sheet maintains flexibility, preventing metal components from brittle fracture due to low-temperature conditions);

• High-Temperature Industrial Furnaces: Thermal insulation layers in high-temperature chambers of semiconductor manufacturing equipment (continuous use at 200-260°C), and mold backing plates in ceramic sintering furnaces (withstands high temperatures without chemically reacting with the workpiece).

Top-Quality Insulation - High-Frequency Stability

PTFE sheet's ultra-high volume resistivity (≥10¹⁸Ω·cm) and stable dielectric properties make it a core insulation material for high-voltage, high-frequency electronic equipment. For example:

• High-voltage cable jacket: The inner insulation layer (PTFE extruded tubing or sheet) of high-voltage cables (tens of kilovolts) used for power transmission prevents leakage and short circuits (insulation reliability >99.9%);

• Circuit board insulation: The interlayer insulation layer (PTFE film or sheet) in high-frequency circuit boards (such as 5G communications equipment) ensures interference-free signal transmission (dielectric loss as low as 0.0004 @ 1GHz);

• Electronic component packaging: The insulating support for semiconductor chips (high-temperature resistant and free of ionic contamination) protects components from electrostatic breakdown and chemical corrosion.

Non-stick properties - easy to clean

PTFE sheet's non-stick properties (water/oil droplets do not spread at all) make it an excellent choice for applications requiring anti-stick properties. For example:

• Food processing equipment: Non-stick coatings (PTFE spray or composite sheet) for pans and baking molds (such as cake pan liners) that prevent food debris from sticking (cleaning requires only rinsing with water);

• Medical devices: Non-stick handles for surgical instruments (to prevent blood and medication from sticking), and coatings on the inner walls of catheters (to reduce tissue adhesion).