Teflon sheet is a special plastic sheet made from pure polytetrafluoroethylene (PTFE) resin through processes such as molding and turning. It has excellent properties such as high temperature resistance, corrosion resistance, low friction, non-adhesion, high insulation, and no toxicity. It is widely used in various industrial fields. The following is a detailed description of its core characteristics and application scenarios:
1. Core Characteristics
1) High temperature resistance: Working temperature range: -196℃ ~260℃. Maintains 5% elongation even at extremely low temperatures, and does not undergo creep or cracking at high temperatures.
2) Corrosion resistance: Almost not corroded by all chemical reagents, including concentrated sulfuric acid, nitric acid, hydrochloric acid, aqua regia, etc., and does not dissolve in any solvent.
3) Low friction coefficient: The lowest solid material friction coefficient (only 0.04), only 1/5 of polyethylene, no need for lubrication to achieve self-lubrication.
4) Non-adhesion: Surface tension is extremely small, does not adhere to any substance, easy to clean and reduces fluid resistance.
5) High insulation: Maintains low dielectric constant and dielectric loss in a wide frequency range, high breakdown voltage, volume resistivity, and strong resistance to electric arcs.
6) Non-toxic and physiological inertness: Can be implanted in the human body as artificial blood vessels or organs, with no adverse reactions.
2. Application Scenarios
1) Chemical and petroleum industry
Equipment manufacturing: Used for sealing linings or structural components of equipment such as pipes, valves, pressure vessels, condensers, heat exchangers, towers, manholes, handholes, etc., to prevent chemical corrosion.
Storage and transportation system: Manufacturing inner linings of storage tanks and silos, storing liquid or solid raw materials (such as milk, juice, edible oil, flour, etc.).
Electrolysis and leaching: In the metallurgical industry, used in electrolytic cells, leaching cells, desulfurization systems, etc., in hot corrosive environments.
2) Electronic and electrical industry
Insulation materials: Used to make insulation layers for wires and cables, insulation rings for capacitors, transformers, etc., to ensure stable electrical performance at high frequencies.
Anti-adhesion coating: Used for circuit board substrates, cable protection sleeves, etc., to prevent adhesion and improve wear resistance.
3) Food and pharmaceutical industry
Hygiene equipment: Manufacturing scraping plates, scrapers, conveyor belts, containers, and pipelines for food machinery, meeting food-grade environmental standards, ensuring no pollution.
Anti-adhesion and easy cleaning: Utilizing non-adhesion to reduce food residues and lower cleaning costs.
4) Medical field
Implants and instruments: Manufacturing artificial blood vessels, organs, surgical tools, infusion tubes, etc., using non-toxicity and corrosion resistance to ensure safety.
5) Mechanical and construction industry
Magnetic components: As bearings, shaft sleeves, piston rings, sealing rings, etc., reducing friction loss and extending service life.
Anti-adhesion materials: Used for traffic bridge sliders, guides, roof waterproof layers, etc., reducing maintenance frequency.
Decorative materials: Manufacturing ceilings, wall panels, etc., with both durability and easy cleaning.
6) Shipbuilding and marine engineering
Resistant to seawater corrosion: Manufacturing ship cabins, pipes, seals, etc., adapting to high-salt corrosion environments.
7) Automotive industry
Sealing and pipeline systems: Used for engine sealing components, fuel lines, etc., capable of withstanding high temperatures, high pressures, and chemical erosion.
3. Hygiene standards: In the food and medical fields, it is necessary to confirm that the products have obtained certifications from organizations such as FDA, ensuring that they are non-toxic and harmless.
4. Mechanical properties: In high-load scenarios, attention should be paid to the tensile strength (≥15 MPa) and elongation at break (≥150%).
