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 Skived Sheet Product Introduction

PTFE skived sheets are high-performance engineering plastic sheets processed from pure polytetrafluoroethylene (PTFE) molded billets using precision CNC skiving technology. As a precision-finished form of PTFE products, they perfectly retain PTFE's excellent chemical stability and temperature resistance, while possessing dimensional accuracy and surface quality unmatched by ordinary molded sheets, making them an ideal choice for high-end industrial fields.

Core Advantages

· Precision Machining: Thickness tolerance up to ±0.01mm, surface roughness Ra 0.4-1.6μm.

· Dense Structure: Porosity < 0.3%, preventing medium penetration (Molded sheets: 1-2%).

· Oversized Dimensions: Maximum width 1500mm, length 5000mm (can be supplied in rolls).

· Excellent Performance:

  · Temperature Range: -200℃ ~ +260℃ (short-term 300℃)

  · Dielectric Strength: 40-60 kV/mm

  · Friction Coefficient: 0.05-0.10

Key Application Fields

· Sealing Systems:

  · ✅ Semiconductor Equipment Vacuum Seals (Ra ≤ 0.8μm)

  · ✅ Petrochemical High-Pressure Flange Gaskets (3-6mm thick)

· Electronics & Electrical:

  · ✅ 5G Base Station High-Frequency Insulation Components

  · ✅ High-Voltage Switch Isolation Plates

· Corrosion Protection Engineering:

  · ✅ Concentrated Sulfuric Acid Tank Linings (Resists 98% acid)

  · ✅ Electrolyzer Insulation Diaphragms

· Special Fields:

  · ✅ Medical Implant Device Components (ISO 10993 Certified)

  · ✅ Aerospace Seals (Passed -196℃ ~ +280℃ tests)

Process Characteristics

1. Machining Technology:

   · Precision skiving using diamond tools.

   · Capable of ultra-thin machining down to 0.1mm.

   · Supports mirror polishing (Ra ≤ 0.4μm).

2. Modification Options:

   · High-Purity Electronic Grade (Metal ions < 1 ppb)

   · Anti-Static Type (Surface Resistance 10⁶-10⁸ Ω)

   · Wear-Resistant Enhanced Type (PV Value ≥ 4 MPa·m/s)

Selection Suggestions

· Standard Sealing: Choose 1-3mm Standard Grade.

· Ultra-High Pressure Conditions: Recommend 6-10mm Reinforced Type.

· Food & Medical: Specify Medical Grade raw material (Compliant with USP Class VI).

Key Characteristics Comparison

Basic Characteristics

Item	Parameter	Test Standard	Comparative Advantage
Raw Material	100% Pure PTFE Molded Billet	-	Additive-free, Purity > 99.9%
Production Process	Precision CNC Skiving	ASTM D4894	Seamless, monolithic forming
Density	2.14-2.20 g/cm³	ASTM D792	Porosity < 0.3% (Molded Sheet 1-2%)
Color	Milky White	Visual	Custom Gray/Black, etc.

Mechanical Properties

Performance Indicator	Value Range	Vs. Molded Sheet	Test Method
Tensile Strength	25-32 MPa	+15-20%	ASTM D638
Elongation at Break	350-500%	+30-50%	ASTM D638
Compressive Strength (10% def.)	18-25 MPa	Better Creep Resistance	ASTM D695
Flexural Modulus	400-600 MPa	Better Dimensional Stability	ASTM D790

Specification Parameters

Item	Standard Range	Customizable Range
Thickness	0.5-10 mm	0.1-30 mm
Width	≤ 1500 mm	≤ 2500 mm
Length	≤ 5000 mm	Continuous Coil
Minimum Machinable Thickness	0.1 mm	Requires Special Tools

Machining Parameters

Process	Recommended Parameter	Precautions
CNC Skiving/Turning	Speed 800-1200 rpm, Feed 0.1 mm/rev	Diamond Tools
Drilling	Feed 0.05-0.1 mm/rev, Coolant	Prevent Delamination
Bonding	Sodium Naphthalenide Treatment + Epoxy Adhesive, Cure 2h @80°C	Peel Strength ≥ 15 N/cm
Thermoforming	200°C ±5°C, 0.3-0.5 MPa	Special Mold Required

Technical Parameters

Parameter	Indicator	Test Standard
Thickness Range	0.1-30 mm	-
Density	2.14-2.20 g/cm³	ASTM D792
Tensile Strength	25-32 MPa	ASTM D638
Elongation at Break	350-500%	ASTM D638
Continuous Service Temperature	-200℃ ~ +260℃	ASTM D794
Dielectric Strength	40-60 kV/mm	ASTM D149

Application Reference

Application Field	Recommended Thickness	Surface Requirement	Alternative Solution
Semiconductor Seals	1-3 mm	Ra ≤ 0.8μm, Cleanroom	PEEK Sheet
High-Pressure Flange Gaskets	3-6 mm	Mirror Polished	Metal Wound Gaskets
Chemical Linings	8-15 mm	Backing Adhesive Treatment	Sprayed PTFE
Cable Insulation	0.5-1 mm	Burr-Free	Burr-Free

Special Types

Type	Key Technology	Performance Indicator
High-Purity Electronic Grade	Ultra-Clean Skiving Environment	Na+ < 0.1 ppm
Anti-Static Type	Carbon Fiber Mixed Skiving	Surface Resistance 10⁶-10⁸ Ω
Wear-Resistant Enhanced Type	Nano-Alumina Filled	PV Value ≥ 4 MPa·m/s
Medical Sterilization Type	Gamma Ray Resistant Treatment	No Degradation @ 50 kGy Dose

Quality Certifications

· FDA 21 CFR 177.1550 (Food Grade)

· UL 94 V-0 Flame Retardant Certification

· RoHS 2.0 Environmental Certification

· ISO 10993-5 (Medical Grade)

Final Selection Suggestions

· Ultra-Thin Applications (0.1-0.5mm): Recommend using composite reinforced material.

· High-Pressure Sealing: Choose 3-6mm thickness, mirror polished.

· Semiconductor: Specify Electronic Grade high-purity material (Metal ions < 1 ppb).