Expanded PTFE Sheet/tape

Ⅰ、Features

Polytetrafluoroethylene is a new type of polymer materials. Polytetrafluoroethylene resin by special processing methods. White, flexible and flexible, with a network of fine fibers connected to form a network of these fine fibers to form numerous pores, the expanded PTFE can be arbitrary bending (over 360 degrees), the expansion of polytetrafluoroethylene Has a good anti-chemical, anti-wear properties and extremely high temperature, low temperature capability, ideal for industrial liquid seal.

Ⅱ、Types and Specifications:

Ⅲ、Main Properties:

Ⅳ、Applications

PTFE gasket for pipe, flange and rubber, plastic, enamel, graphite pieces of industrial machinery in the joints at the sealing material.

  Expanded Polytetrafluoroethylene (PTFE) Sheet Product Introduction

Product Overview

Expanded Polytetrafluoroethylene (PTFE) sheet is a microporous structural material manufactured through a special stretching process. It combines the excellent chemical inertness of PTFE with unique elastic properties, making it an ideal choice for high-end sealing and filtration applications.

Core Features

· Excellent Sealability: Microporous structure provides over 30% compressibility.

· Superior Corrosion Resistance: Withstands all strong acids and alkalis, including aqua regia.

· Broad Temperature Range: Long-term stable use from -200°C to +260°C.

· Permanent Non-stick: Extremely low surface energy, does not adhere to any substance.

· Lightweight Design: Density is only 30-70% of standard PTFE sheet.

Product Specifications

· Thickness: 0.5-50mm (Standard: 1/2/3/5/10mm)

· Size: Maximum 2000mm × 5000mm (Customizable)

· Pore Size: 5-100μm (Selectable)

· Color: Standard white (Gray customizable)

Typical Applications

· Industrial Sealing: Pipeline flange gaskets, pump and valve seals.

· Chemical Filtration: Filtration systems for highly corrosive media.

· Medical Devices: Artificial blood vessels, drug sustained-release carriers.

· Food Processing: Non-stick work surfaces, conveyor belts.

Product Advantages

1. 6 times higher compressibility than standard PTFE sheets.

2. Maintains stable performance under extreme temperatures.

3. Complies with stringent certifications like FDA and ISO 10993.

4. Supports secondary processing like punching, cutting, and thermoforming.

Through its unique microporous structure design, expanded PTFE sheet perfectly solves the problems of high rigidity and poor resilience found in traditional PTFE sheets, demonstrating irreplaceable advantages in chemical, medical, and food fields. We provide professional technical support and recommend the optimal model based on specific application requirements.

Core Characteristics

Characteristic	Parameter/Performance	Application Advantage
Expanded Structure*	Porosity 30-80%, Pore Size 5-100μm	Excellent elastic recovery and sealing performance
Temperature Resistance	-200°C ~ +260°C (Long-term)	Stable performance under extreme temperatures
Chemical Inertia	Resists all strong acids & alkalis (incl. aqua regia)	Suitable for highly corrosive environments
Non-stick Property	Surface energy as low as 18 mN/m	Prevents material adhesion, easy to clean
Mechanical Properties*	Tensile Strength 10-25MPa (varies with density)	Strength increased by 50% vs. standard PTFE sheet

Note: Properties are direction-dependent (anisotropic) due to the expansion process.

Basic Performance Parameters

Performance Indicator	Low-Density Type (0.8 g/cm³)	Medium-Density Type (1.1 g/cm³)	High-Density Type (1.4 g/cm³)	Test Standard
Porosity (%)	70 ±5	50 ±5	30 ±5	ASTM D792
Tensile Strength (MPa)	10-15	15-20	20-25	ISO 527
Elongation at Break (%)	250-350	200-300	150-250	ISO 527
Compression Recovery Rate (%)	≥90	≥85	≥80	ASTM F36
Air Permeability (L/m²·s)	15-25	5-15	1-5	ASTM D737

Physical Properties Comparison

Property	Expanded PTFE Sheet	Standard PTFE Sheet	Advantage Comparison
Density (g/cm³)	0.6-1.5	2.1-2.3	Weight reduced by 30-70%
Compression Rate (%)	25-35	<5	Sealability improved by 5 times
Thermal Conductivity (W/m·K)	0.12-0.18	0.25	Better thermal insulation
Water Absorption (%)	<0.01	<0.01	Equally excellent

Product Specification Parameters

Parameter	Standard Specification	Customization Range
Thickness (mm)	1, 2, 3, 5, 10	0.5-50
Width (mm)	1000	500-2000
Length (mm)	2000	500-5000
Pore Size (μm)	5, 20, 50, 100	1-200
Color	White	Gray / Others

Industry Certification Standards

Certification Type	Standard Number	Applicable Field
Food Grade	FDA 21 CFR 177.1550	Food Processing
Medical Device	ISO 10993	Medical Equipment
Semiconductor	SEMI F57	Wafer Manufacturing
Environmental Protection	RoHS / REACH	General

Recommended Processing Parameters

Processing Method	Parameter Suggestion	Precautions
Punching/Cutting	Die clearance 0.1mm	Use sharp dies
Thermoforming	Heating temperature 330-350°C	Special fixtures required
Bonding	Use adhesive for fluoroplastics	Surface requires activation treatment
Machining	Cutting speed 100-200 m/min	Avoid overheating

Application Selection Guide

Application Scenario	Recommended Type	Key Parameter Requirements
Pipeline Sealing	Medium-Density Type	Compression Rate > 25%
Chemical Filtration	Low-Density Type	Pore Size ≤ 20μm
Medical Implant	Medical High-Density Type	ISO 10993 Certification
Non-stick Lining	Any Type Surface	Roughness Ra < 0.8μm