Comprehensive Analysis of Teflon

  1. HOME
  2. TEFLON
  3. Comprehensive Analysis of Teflon
In connection with high purity demand, strict corrosion-resistance quality of fluoropolymers from semi-conductor industry

Executive Summary




1. What is Teflon®?
2. Key Properties of Teflon PTFE (Polytetrafluoroethylene)
3. PVDF Material Properties and Application Advantages
4. Differences Between NEW-PTFE and PFA
5. Comparison Table for HCl / HF / Ammonia Permeability Resistance
6. How to Choose Fluoropolymer Materials? Analysis of PVDF / PTFE / PFA Differences
7. EVERSUPP: Specialists in Various Teflon Process Applications
8. Practical Experience Q&A: Real Questions from Our Clients


 
 

What is Teflon®?

Teflon® (scientific name Polytetrafluoroethylene, abbreviated as PTFE) is an extremely widely used fluorocarbon polymer. To meet the diverse process conditions of different industries, Teflon materials have evolved into various derivatives such as PVDF, PFA, FEP, ETFE, and NEW-PTFE, each possessing distinct chemical properties.
Teflon is characterized by its water- and oil-repellent, non-stick properties, making it a common choice for cookware coatings. Its resistance to acids, alkalis, and various organic solvents allows for extensive use in the chemical industry as a stable material for handling corrosive chemicals. Furthermore, its low coefficient of friction makes Teflon an ideal lubricating interface for mating surfaces, helping to reduce wear and energy consumption.
Currently, Teflon is widely applied across the food, semiconductor, chemical, mechanical, construction, and medical industries. While specific properties and application focuses may vary by industry, it is universally regarded as a stable, safe, and highly durable premium material.

 


EVERSUPP professional Teflon lining installation in progress
 

Key Properties of Teflon PTFE (Polytetrafluoroethylene)

  • Excellent chemical resistance and anti-stick properties
  • Wide operating temperature range (–200°C to +260°C)
  • Extremely low coefficient of friction, ideal for lubrication purposes
  • Superior electrical insulation
  • UV resistant
  • Excellent surface smoothness and durability

 

PVDF Material Properties and Application Advantages

PVDF, short for Polyvinylidene Difluoride, is a highly non-reactive thermoplastic fluoropolymer. It offers excellent chemical stability and processability, and is commonly used in pure water systems, membrane fabrication, and insulation for electronic components.
Compared to Teflon (PTFE), PVDF has a lower density and is ideal for producing pipes, substrates, cable jacketing, and other components requiring mechanical strength and corrosion resistance. It is widely applied in high-standard industries such as chemical processing, semiconductors, and pharmaceuticals.
Although both fluoropolymers are high-performance plastics, their application scenarios and molding methods differ. Yuan Cheng Tech is deeply familiar with PVDF and PTFE processing conditions and can recommend the most suitable materials for high-specification manufacturing environments based on actual requirements.

 


Comparison Between NEW-PTFE and PFA

01

NEW-PTFE offers a smoother surface and superior cleaning performance compared to PFA

Smooth surface and easy to clean.
The wetted surface maintains high flatness; microscopic observation (10,000×) reveals low roughness, effectively reducing the risk of residue and contamination, making it ideal for high-purity processes.

02

NEW-PTFE Corrosion Resistance Testing

Accelerated corrosion tests using 98% concentrated nitric acid and continuous outdoor environmental testing for five years showed no abnormalities in NEW-PTFE sheets, demonstrating outstanding long-term chemical resistance.

03

Excellent Weld Strength

Unlike traditional lining sheets which are prone to weld cracking, NEW-PTFE linings remain structurally intact after peel testing, with no delamination or rupture. Its high ductility (maximum elongation up to 450%) effectively absorbs thermal stress and external deformation, enhancing reliability.

04

Chemical Permeation Resistance Comparison

In highly corrosive environments such as Hydrofluoric Acid, Hydrochloric Acid, and Ammonia, NEW-PTFE exhibits significantly better permeation resistance than PFA. This highlights the distinct PFA vs. PTFE differences, making it a reliable material choice for enhanced sealing and durability.


 

Permeation Resistance Comparison Table: HCl / HF / Ammonia

Permeation Resistance Comparison Table for Hydrochloric Acid, Hydrofluoric Acid, and Ammonia

How to Choose Fluoropolymer Materials? Analysis of PVDF / PTFE / PFA Differences
Fluororesins (such as PTFE, PFA, and PVDF) offer exceptional chemical resistance, heat resistance, and electrical properties, making them widely used in the semiconductor, chemical, and electronics industries. The following comparison table is designed to help you quickly understand the performance differences of each material and select the most suitable solution.
Properties Unit ASTM Test Method PTFE FEP PFA ETFE ECTFE PVDF TFM
Physical Properties Melting Point ℃ - 327 275 310 270 220-245 156-178 327
Specific Gravity   D792 2.14-2.20 2.12-2.20 2.12-2.17 1.70 1.68-1.69 1.75-1.78 2.16-2.19
Mechanical Properties Tensile Strength kgf/cm² D638 140-350 190-220 280-300 460 420 250-510 250-350
Elongation % D638 200-400 250-330 300 100-400 200-300 12-430 250-450
Compressive Strength kgf/cm² D695 120 155 - 500 - 460-980 160
Impact Strength (Izod) kgfcm/cm D256A 16.3 OK OK OK OK 16.3-38.1 -
Rockwell Hardness - D785 - - - R50 R93-95 R77-83 -
Shore Hardness - D2440 D50-55 D60-65 D64 D75 D55 D75-77 D58
Flexural Modulus 103kgf/cm² D790 5.6 5.6-6.7 8.4 14 6.7-7.0 20.4-25.3 -
Tensile Modulus 103kgf/cm² D638 4.1-5.6 3.5 - 8.4 16.8 10.2-30 -
Dynamic Friction Coefficient - 7kgf/cm²
3m/min		 0.10 0.3 0.2 0.4 - 0.39 0.18
Electrical Properties Volume Resistivity Ω-cm D257(50%RH.23℃) >1018 >1018 >1018 >106 1015 2×1014 >1018
Dielectric Breakdown Strength (Short term) kv/mm(3.2mm thick) D149 19 20-24 20 16 20 16 19
Dielectric Constant 60HZ - D150 <2.1 2.1 <2.1 2.6 2.6 2.6 <2.1
103HZ - D150 <2.1 2.1 <2.1 2.6 2.6 2.6 <2.1
106HZ - D150 <2.1 2.1 <2.1 2.6 2.6 2.6 <2.1
Dissipation Factor 60HZ - D150 <0.0002 <0.0002 <0.0002 <0.0006 <0.0005 <0.0006 <0.0002
103HZ - D150 <0.0002 <0.0002 <0.0002 <0.0008 <0.0015 <0.0008 <0.0002
106HZ - D150 <0.0002 <0.0005 <0.0003 <0.005 <0.015 <0.005 <0.0002
Arc Resistance sec D495 >300 >300 >300 75 18 75 >300
Durability Chemical Resistance - D543 Excellent Excellent Excellent Excellent Good Good Excellent
Flammability - D635 Non-flammable Non-flammable Non-flammable Non-flammable Non-flammable Self-extinguishing Non-flammable

Water Absorption 24H

 % D570 <0.01 <0.01 <0.03 <0.029 <0.01 <0.04 <0.01
Thermal Properties Thermal Conductivity 10-4cal/cm²sec℃ C117 6.0 6.0 6.0 5.7 3.8 2.4-3.1 6.0
Specific Heat cal℃/g - 0.25 0.28 0.25 0.46-0.47 - 0.33 0.25
Linear Expansion Coefficient 10-4/C D696 10 8.3-10.5 12 5.9 8 7-14 12
Ball Pressure Temperature ℃ - 180 170 230 185 - - -
Heat Deflection Temperature 18.5kgf/cm² ℃ D648 55 50 47 74 77 54-115 -
4.6kgf/cm² ℃ D648 121 72 74 104 116 138 -
Max. Continuous Service Temp. ℃ - 260 204 260 150-180 165-180 150 260

EVERSUPP

EVERSUPP: Specialists in Comprehensive Teflon Process Applications

EVERSUPP Tech specializes in the process applications of Teflon (PTFE) and its derivative materials. Our service scope covers Teflon lining and coating, Teflon fabrics, heat exchangers, Teflon hoses, precision machining, and various customized products.

To ensure process transparency and quality consistency, EVERSUPP has pioneered the "Product Traceability" concept. From raw material sourcing and processing workflows to QC inspections and final client acceptance, we maintain fully traceable records to help mitigate risk and satisfy high-specification requirements.

Currently, EVERSUPP’s Teflon applications are widely integrated into semiconductor chemical storage tanks, acid supply systems, precision piping, corrosion-resistant vessels, and sealing components. Our stable quality has earned significant recognition from chemical and semiconductor industry clients worldwide.

For more information on Teflon process applications, please contact the EVERSUPP team.

Contact Us
 

Practical Experience Q&A

Nov 10th - Inquiry from TSMC Factory Audit:
  • Q1 Why is 3mmT Teflon lining used for the interior of the tanks?
    In the past, 2mmT thickness was the standard for sheet lining. Considering the chemical permeation rate, thicker sheets provide better resistance. Therefore, 3mmT has become the current global industry standard for optimal protection.
  • Q2 Why not use 5mmT Teflon lining for the tank interior?
    5mmT sheets are significantly stiffer. During the bending and fitting process, they are prone to wrinkling or trapping air bubbles, which compromises the bonding quality and sealing integrity. Consequently, 3mmT remains the mainstream specification in practical application.
Oct 17th - Consultation from China Ecotek (CEC) Factory Audit:
  • Q1 Is there any benefit to adding fiberglass backing to the Teflon sheets to improve adhesion to the tank interior?
    Fiberglass backing provides excellent adhesion specifically for high-temperature zones. However, under standard operating conditions, peel tests show no significant difference in the adhesion performance of the Teflon sheets themselves.