PTFE Molded/Skived Sheet/Film

Ⅰ、Features

Polytetrafluoroethylene sheet by suspension polymerization of PTFE resin molding. It has the best chemical resistance in known plastics and does not age. It has the best coefficient of friction in known solid materials and can be used at -180 ° C to +260 ° C without load.

Ⅱ、Specifications:

Ⅲ、Main Properties 

 

Ⅳ、Usage:

Seals and lubricants for use in a variety of media, as well as electrical insulation for use at various frequencies. Capacitor media, wire insulation, electrical instrumentation insulation.

PTFE Molded Sheet Product Introduction

PTFE molded sheets are engineering plastic sheets manufactured from polytetrafluoroethylene (PTFE) resin through traditional compression molding and sintering processes. As the standard form of PTFE products, they serve as fundamental materials in industrial fields such as chemical, mechanical, and power engineering due to their excellent comprehensive properties and mature manufacturing technology.

Core Characteristics

· Corrosion Resistance: Withstands highly corrosive media like 98% concentrated sulfuric acid and 50% sodium hydroxide.

· Temperature Resistance: Long-term use from -200℃ to +260℃, short-term tolerance up to 300℃.

· Insulation Performance: Volume resistivity >10¹⁶ Ω·cm, dielectric strength 40-60 kV/mm.

· Low Friction: Friction coefficient 0.05-0.10, good self-lubrication.

Product Advantages

· Complete Specifications: Thickness 0.5-100mm, maximum size up to 1500×1500mm.

· Cost-Effective: Cost is 20-30% lower than skived sheets, suitable for bulk procurement.

· Flexible Modification: Can add functional fillers like glass fiber, graphite, copper powder.

· Stable Process: Good consistency in batch production.

Typical Applications

· Sealing Components: Flange gaskets, valve packing.

· Corrosion Protection Linings: Reactor and storage tank linings.

· Electrical Insulation: High-voltage switch barriers, terminal insulation.

· Wear-Resistant Parts: Bearing pads, guideway sliders.

Technical Parameters

Item	Pure PTFE	Glass Fiber Reinforced	Graphite Filled
Tensile Strength (MPa)	14-21	25-32	18-24
Heat Deflection Temp. (°C)	Heat Deflection Temp. (°C)	120	95
Friction Coefficient	0.05-0.10	0.12-0.18	0.08-0.12

Selection Suggestions

· Recommended Scenarios:

  · ✅ Conventional corrosion protection

  · ✅ Small/medium-sized components

  · ✅ Cost-sensitive projects

Technical Parameters

Performance Indicator	Parameter Range	Test Standard
Density	2.10-2.30 g/cm³	ASTM D792
Tensile Strength	14-28 MPa	ASTM D638
Elongation at Break	200-400%	ASTM D638
Compressive Strength (10% def.)	12-18 MPa	ASTM D695
Heat Deflection Temperature	55℃ (0.45MPa)	ASTM D648

Basic Characteristics

Item	Parameter	Test Standard	Remarks
Raw Material	100% Pure PTFE or Modified PTFE	-	Optional fillers: GF/Graphite, etc.
Production Process	Compression Molding + Sintering	ASTM D4894	Max. Sintering Temp. 380℃
Color	White (Natural)	Visual	Custom Black/Gray, etc.
Density	2.10-2.30 g/cm³	2.10-2.30 g/cm³	Filled types slightly higher
Filled types slightly higher	< 0.01%	ASTM D570	Almost non-absorbent

Mechanical Properties

Performance Indicator	Pure PTFE	20% GF Reinforced	15% Graphite Filled	Test Standard
Tensile Strength (MPa)	14-21	25-32	18-24	ASTM D638
Elongation at Break (%)	200-400	100-200	150-250	ASTM D638
Compressive Strength (MPa)	12-18	35-45	28-35	ASTM D695
Flexural Modulus (MPa)	350-500	800-1000	600-800	ASTM D790

Product Specifications

Parameter	Standard Range	Customizable Range
Thickness	0.5-100 mm	0.3-150 mm
Size	≤ 1000×1000 mm	≤ 1500×1500 mm
Tolerance	± 0.2 mm	± 0.1 mm (Precision Machined)
Minimum Bend Radius	5 × Thickness	3 × Thickness (Hot Bending)

Machining Parameters

Process	Recommended Parameter	Key Control Points
CNC Machining	Speed 500-800 rpm	Diamond Coated Tools
Drilling	Feed Rate 0.05-0.1 mm/rev	Coolant Assistance
Bonding	Sodium Naphthalenide Treatment + Epoxy Adhesive	Curing 80℃ × 2h
Thermoforming	200℃ ±5℃, 0.3-0.5 MPa	Special Anti-Deformation Mold

Certification Standards

Application Reference

Application Scenario	Recommended Thickness	Surface Treatment
Chemical Sealing Gaskets	3-6 mm	Machined Surface Ra 1.6μm
Electrical Insulation Plates	1-3 mm	Natural Sintered Surface
Wear-Resistant Bearing Seats	10-20 mm	Graphite Filled + Polishing
Corrosion Protection Lining	8-15 mm	Edge Wrapping Treatment

Packaging & Storage

Item	Requirement	Precautions
Packaging Method	PE Film + Hard Cardboard	Dust & Scratch Prevention
Storage Temperature	15-25℃	Avoid Direct Sunlight
Stacking Height	≤ 800 mm	Prevent Deformation
Shelf Life	10 Years	In Original Packaging