Product Overview
Product Description
Soft teflon sheet (also called soft polytetrafluoroethylene sheet, low-density PTFE sheet, orsoft PT sheet) is produced via specialized processing that yields a lower density, more compressible PTFE material compared with standard hard PTFE sheets. The softer matrix improves conformability and sealing under low bolt loads while maintaining PTFE’s hallmark chemical inertness and thermal stability.
Business Value
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Faster assembly and fewer leakage callbacks for maintenance teams.
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Reduced shaft wear and energy loss where sliding contact exists.
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Easier die-cutting and gaskets manufacture — lowers part tooling wear and cost.
Key Features / Quick Facts
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Soft & conformable — fills flange/slot irregularities for reliable sealing.
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Excellent chemical resistance — stable across nearly all industrial media (pH 0–14).
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Low coefficient of friction — minimizes shaft/wear and reduces running torque.
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Wide temperature range — typically serviceable from -200°C to +260°C (grade dependent).
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Clean & inert — suitable for food, pharma and laboratory environments (FDA grades available).
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Available formats — sheets (standard sizes), custom-cut gaskets, liners, die-cut rings.
Common Product Aliases
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Soft PTFE Sheet
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Flexible PTFE Sheet
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Low-Density PTFE Sheet
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Soft Polytetrafluoroethylene Sheet
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Soft PTFE Liner/Gasket Sheet
Technical Specifications
Typical Material Properties
| Property | Typical Value (example) |
|---|---|
| Material | Soft / low-density PTFE (100% PTFE) |
| Thickness range | 0.25 mm – 6.0 mm (stock) — custom up to 12 mm |
| Standard sheet sizes | 500×500 mm, 1000×1000 mm, 1500×1500 mm (others on request) |
| Density | 0.85 – 1.8 g/cm³ (grade dependent) |
| Temperature range | -200°C – 260°C |
| Tensile strength | ≥ 15.0 MPa |
| Compression set | Low (good recovery) |
| Chemical resistance | Excellent (most acids, alkalis, solvents) |
| Color & finish | White, smooth or textured finishes available |
Standard Sizes & Common Dimensions
| SKU | Size (mm) | Thickness (mm) |
|---|---|---|
| SPTFE-500 | 500 × 500 | 0.5 / 1.0 / 2.0 |
| SPTFE-1000 | 1000 × 1000 | 0.5 / 1.0 / 2.0 / 3.0 |
| SPTFE-1500 | 1500 × 1500 | 1.0 / 2.0 / 4.0 |
| Custom | As requested | 0.25 – 12.0 |
Common Die-Cut Items
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Gaskets for sanitary fittings (ID/OD per drawing)
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Liner plates and window seals
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Custom washers, flange rings and stripes
Typical Applications & Industries
Typical Applications & Industries-
Gasketing & flange seals for chemical processing industry
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Soft liners for tanks, pipes and valves to prevent corrosion/contamination
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Seals and wear strips in pumps, mixers and agitators
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Food & beverage and pharmaceutical equipment (FDA option)
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Laboratory equipment, analytical instruments and cryogenic seals
Advantages & Buyer Benefits
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Superior conformability — seals uneven faces at lower bolt torque.
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Low friction — reduces wear on moving components, saving maintenance cost.
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Chemical inertness — minimal contamination risk for sensitive processes.
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Easy machining & die-cutting — lowers part manufacturing cost and lead time.
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Food/pharma safe options — FDA/USP available for regulated industries.
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Long service life — resists aging, weathering and most aggressive media.
Comparison — Soft PTFE Sheet vs Other Materials
| Feature / Material | Soft PTFE Sheet | Standard (Hard) PTFE Sheet | Graphite Sheet | Rubber (NBR/EPDM) |
|---|---|---|---|---|
| Conformability | High | Low–Medium | Medium | High |
| Chemical resistance | Excellent | Excellent | Moderate | Variable |
| Friction / wear | Very low | Very low | Higher | Higher |
| Die-cutting / machinability | Easy | Harder | Moderate | Easy |
| Temperature range | -200 to +260°C | -200 to +260°C | Up to ~450°C | -40 to +150°C |
| Best for | Low-bolt sealing, liners, low-friction parts | Rigid parts, structural PTFE | High-temp steam | General purpose seals |
Differentiator: Soft PTFE is the preferred choice when conformability and low friction are critical, but plastic-to-plastic mechanical strength is less important than sealing performance.
Customization & Value-Added Services
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Precision die-cut gaskets from customer DXF/CAD/PDF.
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CNC milling & waterjet cutting for complex shapes.
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Surface treatments: textured, matte or polished finishes.
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Bonding or lamination to other substrates (e.g., PTFE on metal).
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Private-label packaging and kit assembly for OEMs.
Installation & Maintenance Guidance
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Ensure flange faces and mounting surfaces are clean and free of debris.
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Use recommended gasket thickness for flange class or slot tolerance.
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Avoid over-torquing — soft PTFE sheet at lower bolt loads than rigid materials.
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Inspect periodically; replace if extrusion or permanent deformation is observed.
FAQ
Q1: What is the minimum order quantity (MOQ)?
A: Stock sheet SKUs usually start at 5–10 sheets. Custom die-cut orders typically start at 100–200 pcs per design. Contact sales to discuss small-batch options.
Q2: What is the lead time for samples and custom parts?
A: Samples: 1–3 business days. Stock sheets: 1–5 business days. Custom die-cut parts: 7–18 days depending on quantity and tooling.
Q3: Can you ship internationally and what documents are included?
A: Yes — we ship worldwide via express, air and sea. Standard docs: COA, packing list and commercial invoice. FDA/USP statements available for qualified orders.
Q4: Do you accept drawings or samples for custom work?
A: Yes — we accept DXF, CAD and PDF drawings and can work from physical samples. For new preforms, please provide detailed dimensions and tolerances.
Q5: Is there an FDA-compliant grade for food/pharma use?
A: Yes — FDA / USP-classifiable soft PTFE formulations and documentation are available upon request. Specify required certification at RFQ.
Q6: How should I install soft PTFE gaskets to avoid extrusion?
A: Use appropriate gasket thickness for the flange gap, apply recommended bolt torque in a cross pattern, and consider backup rings for high-pressure applications.
Q7: Can you laminate PTFE onto metal or provide bonded assemblies?
A: Yes — we offer lamination and bonded assemblies per drawing for specific mounting or reinforcement needs.
