PTFE Plastic Teflon Sheet for Heat Press
7 month ago
Product details
F4 Sheet White PTFE Board 1mm to 100mm
Core Performance Parameters and Advantages
Basic Physical Properties
Density: 2.2 g/cm³ (lighter than water and nearly two-thirds that of aluminum). Due to the densely packed molecular chains and the high density of fluorine atoms, the material is still significantly lighter than metals (e.g., 7.8 g/cm³ for steel).
Color: White, black (with added carbon black or other fillers).
Surface: Smooth and flat. Extremely smooth surface with a very low coefficient of friction, making it suitable for sliding contact with metals and other plastics.
Mechanical Properties
Tensile Strength: 23 MPa (lower than the 50-70 MPa of metal and most engineering plastics like PA6, but higher than soft rubber);
Elongation at Break: ≥300% (Extremely high; when subjected to stress, it deforms significantly rather than cracking, making it suitable for absorbing impact energy);
Flexural Strength: 15.5 MPa (Can withstand moderate bending loads, but has poor rigidity);
Compressive Strength: Approximately 10-15 MPa (Stable under low pressure; requires filler modification, such as glass fiber reinforcement, for high pressure);
Hardness (Shore D): 50-55 (Harder than rubber, but softer than metal/engineering plastics).
Typical Applications: PTFE sheets are used in components requiring cushioning, vibration reduction, or flexible sealing (such as gaskets and O-rings). However, their low rigidity makes them unsuitable for withstanding high axial pressure. (For high-strength support, they require glass fiber or carbon fiber filling).
Chemical Properties
Acid and Alkali Resistance: Unreactive to highly corrosive reagents such as aqua regia (concentrated nitric acid + concentrated hydrochloric acid), hydrofluoric acid (HF), concentrated sulfuric acid (98%), and concentrated sodium hydroxide (40%) at temperatures ranging from room temperature to 250°C.
Organic Solvent Resistance: Stable to almost all organic solvents (such as acetone, ethanol, benzene, toluene, and chloroform) (may only slightly swell at high temperatures, but will recover upon cooling).
Other Media Resistance: Resistant to water (including boiling water), steam, oxidizing agents (such as hydrogen peroxide), and reducing agents (such as sodium sulfite).
Special Advantages: PTFE sheets are irreplaceable in highly corrosive chemical production (such as electroplating tanks and pickling lines), laboratory equipment (such as reactor linings), and the pharmaceutical and food industries. They can withstand direct contact with extreme chemical environments (such as pipe joints and valve sealing surfaces).
Thermal Properties
Melting Point: Approximately 330°C (theoretical value; in actual processing, it begins to soften and flow at 380-400°C);
Continuous Use Temperature: -200°C to 260°C (limited to short-term high temperatures of 280°C);
Low-Temperature Toughness: Remains flexible (does not crack) at -200°C (in liquid nitrogen), making it suitable for use in extremely cold regions.
Typical Applications: PTFE sheets are used in high-temperature chemical reaction equipment (such as pyrolysis furnace seals) and low-temperature refrigeration systems (such as liquid nitrogen pipeline flange gaskets). Their wide temperature range stability far exceeds that of ordinary plastics (e.g., nylon has a temperature resistance of ≤120°C; PEEK, while having a high temperature resistance, is expensive).
Friction and Wear Resistance
PTFE has the lowest kinetic friction coefficient in nature and excellent self-lubricating properties:
Coefficient of friction: Approximately 0.04-0.10 (unlubricated) against steel, lower than graphite (0.1-0.2) and molybdenum disulfide (0.1-0.15);
Wear rate: In sliding friction, PTFE wear is only 1/10-1/5 that of nylon (PA6);
Self-lubricating properties: PTFE can operate smoothly under low-speed and medium-load conditions (e.g., bearing bushings and guide rails) without the need for additional lubricant.
Special limitations: Pure PTFE has insufficient wear resistance, but this can be significantly improved by filling it with fillers such as carbon fiber (CF), graphite (Gr), molybdenum disulfide (MoS₂), and bronze powder (Cu). (For example, carbon fiber-filled PTFE increases wear resistance by 5-10 times) to meet the requirements of high-load friction scenarios.
Electrical Properties
Insulation Resistance: Volume Resistivity ≥ 1014 Ω·cm (close to ideal insulator);
Dielectric Strength: ≥ 60 kV/mm (much higher than air's 3 kV/mm, resistant to high-voltage breakdown);
Dielectric Constant: 2.0-2.1 (extremely low and stable, low signal transmission loss);
Dielectric Loss Tangent: 0.0002-0.0005 (extremely low, virtually no energy loss at high frequencies).
Typical Applications: PTFE sheet is the preferred material for high-frequency electronic devices (such as 5G communication filter brackets and radar antenna insulation), high-voltage cable connectors, and insulating components in semiconductor manufacturing equipment (such as PCB support frames and electrode isolation rings).
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Foshan Anheda New Material Co., Ltd
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8 month
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Nylon Sheet,
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