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Teflon (PTFE)

Table of Contents

1. Basic Definition

Teflon is the well-known brand name for PTFE (Polytetrafluoroethylene), a high-performance fluoropolymer thermoplastic invented by DuPont. Its molecular structure consists of carbon chains fully wrapped by fluorine atoms, giving it unmatched unique properties among all plastics.

2. Main Classifications

  1. Virgin PTFE: Pure raw material, highest chemical stability, used for high-standard sealing and medical parts.
  2. Filled PTFE: Mixed with glass fiber, carbon, bronze, graphite or molybdenum disulfide to improve wear resistance, hardness and creep resistance.
  3. Modified fluoroplastics (PFA, FEP): Melt-processable fluoropolymers with similar Teflon performance, suitable for injection molding.

3. Outstanding Advantages

  1. Extreme chemical inertness Resists almost all acids, alkalis, solvents, strong oxidants, aqua regia and corrosive gases; only molten alkali metals can erode it.
  2. Ultra-low friction coefficient One of the slipperiest solid materials; self-lubricating, no oil required for sliding friction pairs.
  3. Wide temperature working range Continuous operating temperature from -200°C up to 260°C, remains flexible at cryogenic temperatures and stable under high heat.
  4. Perfect non-stick surface Almost no substance adheres to PTFE surface, widely used for non-stick cookware coatings.
  5. Excellent insulation performance Stable dielectric properties, resistant to high voltage, ideal for electronic insulating components.
  6. Zero water absorption Completely waterproof and moisture-proof, dimensional stability will not be affected by humid environments.
  7. Biocompatible & non-toxic Medical-grade PTFE meets food and medical contact standards, harmless to human body.

4. Drawbacks

  • Poor wear resistance for pure PTFE; easy to creep and deform under long-term heavy load (filled grades can fix this).
  • Cannot be melted and injection molded; only processed by compression molding, sintering or coating.
  • Low surface hardness, easy to scratch.
  • Poor adhesion; special surface etching treatment is needed for bonding or coating.

5. Typical Applications

Industrial Sealing & Mechanical Parts

Gaskets, O-rings, valve seats, pump liners, bearing sliding strips, wear-resistant bushings.

Chemical Equipment

Corrosion-resistant pipes, tank linings, filter membranes, reaction vessel inner coatings.

Electronic & Electrical

High-temperature wire insulation, circuit insulation sheets, cable sheaths.

Food & Kitchen

Non-stick pan coatings, food conveyor belts, sealing gaskets for food machinery.

Medical Devices

Vascular grafts, surgical implant parts, medical pipeline liners.

Daily & Special Fields

Waterproof breathable fabrics, anti-corrosion tape, lab experimental utensils.

6. Key Physical Parameters

  • Density: 2.14–2.20 g/cm³
  • Melting point: 327 °C
  • Continuous service temperature: -200 ~ 260 °C
  • Water absorption: 0%
  • Coefficient of friction: ~0.04 (extremely low)

PTFE (Teflon) Material Parameter Table

Parameter NameReference Specifications
PriceHigher raw material cost; price calculated by part weight, machining difficulty, order quantity and grade
Delivery timePrototypes: 4–6 working days; Mass production: 8–14 working days
Wall thicknessMinimum 1.5 mm; optimal range 2–8 mm; Thin walls are prone to bending and chatter during cutting
toleranceStandard tolerance ±0.12 mm; Precision tolerance ±0.05–0.08 mm with extra processing cost, complies with ISO 2768-m
Maximum part sizeCNC solid sheet/block/rod machining: 1200 × 1000 × 300 mm
Available PTFE Grades1. Virgin pure PTFE (natural white, superior chemical corrosion resistance)2. Glass filled PTFE: enhanced dimensional stability, reduced creep3. Carbon filled PTFE: anti-static, improved wear resistance4. Graphite filled PTFE: self-lubricating for sliding bearings5. Bronze filled PTFE: high compression resistance for heavy-load components6. FDA food-grade PTFE for food processing equipment

Frequently Asked Questions

  To shorten the delivery cycle of CNC workpieces, we start with the documents submitted by customers. Please provide complete and clear 2D drawings, 3D models, dimensional tolerances, surface requirements, and processing specifications, and specify special materials, surface treatments, and assembly standards. Avoid incomplete drawings, ambiguous markings, and version confusion.
Complete documents enable direct programming, order splitting, and production scheduling, cutting down repeated confirmation and supplementary work. Customers are also advised to finalize order quantity, delivery schedule, and special requirements in advance. Eliminating repeated communication and rework risks at the source accelerates the whole process and effectively shortens the overall lead time.

  With 12 years of expertise in CNC machining, YUEYI stands out from other manufacturers and middlemen. Our factory covers an area of 4,000 mu and is equipped with over 100 processing machines. We achieve a machining precision up to 0.001 mm, capable of producing high-precision components. Backed by standardized production management, our on-time delivery rate reaches 98%. As a direct manufacturer with full in-house production capacity, we control every production link without outsourcing. We deliver consistent quality, outstanding precision and reliable lead time, making us your trustworthy partner for CNC precision machining.

  Fast delivery is one of our key strengths. For 3D printing orders, we support delivery within 3 days, ideal for rapid prototyping and urgent sample requests. For regular CNC machining projects, the standard lead time is around 3 weeks.
We manage the whole process in-house, from drawing review and process planning to production, quality inspection, and shipment, with no intermediate links. Equipped with complete facilities and an experienced team, we reliably fulfill both urgent sample orders and mass production. We guarantee stable lead time and consistent quality to keep your projects on track.

  We offer a full range of surface treatments with rich color options. Our services include anodizing, powder coating, spray painting, electroplating, wire drawing, sandblasting, and polishing. Anodizing features various colors and strong anti-corrosion performance for aluminum parts. Powder coating and spray painting come with extensive color selections and durable coatings. Electroplating enhances luster and rust resistance. Wire drawing creates fine linear textures, while sandblasting delivers a matte finish. Polishing achieves a bright and smooth surface. All finishes can be customized in colors and styles to match your application needs.

  Yes, we fully provide complete material certificates and relevant test reports for all CNC-machined parts. All raw materials are sourced from qualified suppliers with authentic documentation. We can offer material certifications, dimension inspection reports, and quality test records upon request. Every product is strictly inspected before delivery. These official documents fully guarantee material compliance and product quality, supporting your quality audit and project requirements.

  We take strict quality control measures in advance to prevent non-conforming products. Every workpiece is fully inspected dimensionally and visually during and after production to ensure full compliance with design drawings and specifications.
In the rare case of non-compliant items, we will take immediate responsibility. We will promptly confirm the issues with you, then arrange free rework or remanufacturing as required. All related costs will be borne by us. We will also analyze the root cause to optimize our processes and avoid similar problems recurring. Our goal is to deliver qualified products steadily and safeguard your project progress.

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