Dong Loi Equipment & Services Corporation, established in 2002 in Ho Chi Minh City with branches in Dong Nai and Ha Noi, is a leading provider of technical services, industrial, construction and mining equipment.
PFA vs PTFE - What is The Difference, and PFA Welding Rod
PFA vs PTFE - What is The Difference, and PFA Welding Rod
PFA Welding Rod
PFA Weld Rod offers many benefits including:
Hot air weldable with similar tools and techniques to polypropylene
Allows bonding of high-value PFA materials for unique applications
Greater thermal stability than PTFE with a melt point of 302° C
Inert to industrial chemicals and solvents below the melt point
Stability in concentrated acids and bases
FDA, and USDA compliant grades available.
PFA
PFA is short for perfluoroalkoxy, or better known by DuPont’s brand name, Teflon® PFA. PFA has outstanding non-stick properties by having a low friction coefficient. It is a fairly flexible polymer with a high resistance to stress cracking and is resistant to almost all solvents and chemicals. PFA is also capable of withstanding both high and low-temperature conditions. It is able to provide continuous service temperatures up to 260°C (500°F). PFA offers extraordinary flame resistance, chemical stability, and high dielectric strength.
A wide variety of applications involving critical, highly corrosive processes use PFA tubing. PFA lining material can protect chemical equipment from corrosion. Additional applications can include filtration housings, heat exchangers, pump housings, fittings, etc. Process Technology utilizes PFA in the construction of TIH inline chemical heaters, Pulsar point-of-use (POU) inline heater, XC Series inline exchanger, and X Series immersion coils.
PTFE
PTFE (polytetrafluoroethylene) is the most popular form of Teflon and is also a synthetic fluoropolymer of tetrafluoroethylene. Additional names for PTFE are Fluon and Syncolon. In 1938, PTFE was accidentally discovered by Roy Plunkett of the DuPont Company while attempting to create a non-flammable and non-toxic coolant for refrigerators. It is a high-molecular-weight compound consisting of carbon and fluorine, a fluorocarbon solid. PTFE is hydrophobic – no, it’s not afraid of water – it doesn’t get wet from water or any substances containing water. The high electronegativity of fluorine provides PTFE with a very low friction coefficient when it comes into contact with solids giving PTFE its well-known “slipperiness” property. Other characteristics of PTFE include high chemical resistance, low- & high-temperature capabilities, resistance to weathering, as well as electrical & thermal insulation.
PTFE has many applications such as a non-stick coating for pans and cookware. Its non-reactive properties make it ideal for lining pipes, containers, and tanks that contain corrosive and reactive chemicals. An exceptional lubricant, PTFE can improve energy consumption and less wear & tear when used in machinery as it reduces friction. Process Technology utilizes PTFE in the construction of the TIH, and SHC inline chemical heaters, as well as the Lufran ultra-pure water heater, HX Series immersion heaters, X Series immersion coils, and LTFH high-temperature filter housing.
The Difference
There are a few significant property differences between these two fluoropolymers to consider when choosing the right one for your process. Differences in alkoxy substituents allow PFA to be melt processable through conventional injection molding and screw extrusion techniques, whereas PTFE is not. PFA is more flexible but has a lower flex-life, so it isn’t as capable of enduring repetitive folding. PTFE has a slightly higher heat resistance but lacks when compared with the flow, creep resistance, and thermal stability. The melting points of PFA and PTFE are 260°C and 327°C respectively. Water absorption and weathering affect PFA more than PTFE, although PFA is superior in salt spray resistance. Finally, the most notable difference between the two is that PFA’s dielectric strength is 3 to 4 times higher than PTFE.
We hope that this has left you with a better understanding of these fluoropolymers!
Tin tức khác
Date: 06/06/2025 | 365 views
Here is the English translation of the optimized Vietnamese article, tailored for advertising ECTFE lining inspection using the Buckleys PST-100 spark tester, while also introducing the Weldplast S1 F extrusion welder, and Penweld 505-A & Airstream 100 hand welding kits — optimized for Google search, AI assistants, and deep research tools:
Precision Heating – A Core Element in Semiconductor Manufacturing
The semiconductor industry demands absolute precision in every production stage. From PCB drying, flux removal, to adhesive curing or wafer processing – clean, stable, and accurate heating is critical to ensure product quality.
That’s why Leister – the world-leading Swiss manufacturer of hot air and infrared heating solutions – is trusted by top semiconductor manufacturers worldwide.
In industries demanding high precision and chemical resistance, welding technical plastics like PFA, ECTFE, and PTFE has always been a significant challenge. To meet this need, Leister Weldplast S1 F extrusion welder stands out as an advanced solution, offering exceptional performance and unmatched weld quality. This article will delve into the outstanding advantages of the Weldplast S1 F, helping businesses optimize their welding processes and achieve maximum production efficiency.
Trong bối cảnh ngành hàng hải toàn cầu đang chuyển hướng mạnh mẽ sang các giải pháp bền vững, tàu HDPE (polyethylene mật độ cao) đang trở thành xu hướng tiên phong tại Việt Nam, mang lại hiệu quả kinh tế và bảo vệ môi trường. Với các ưu điểm vượt trội như khả năng tái chế 100%, trọng lượng nhẹ, chống ăn mòn, và chi phí bảo trì thấp, HDPE đang thay đổi cách chúng ta đóng tàu. Cùng với đó, các thiết bị hàn nhựa tiên tiến từ Leister như WELDPLAST S1, S2, FUSION 1, 2, 3C, TRIAC AT, TRIAC ST, WELDPEN A đang đóng vai trò quan trọng trong việc đảm bảo chất lượng các đường hàn, mang đến độ bền tối ưu cho tàu HDPE.
Ngành công nghiệp vận tải biển của Hàn Quốc đang đứng trước một sự thay đổi lớn: Thay vì sử dụng tàu làm từ nhựa cốt sợi thủy tinh (GRP), vốn khó tái chế, HDPE (polyethylene mật độ cao) đang trở thành một giải pháp thay thế bền vững. Loại nhựa chắc chắn và có thể tái chế này mang lại nhiều lợi ích – từ chi phí bảo trì thấp đến việc giảm lượng khí thải carbon. Hãy tìm hiểu tại sao tàu HDPE là tương lai của ngành hàng hải và vai trò của công nghệ Leister trong xu hướng này.
Nghiệm thu mối hàn màng HDPE bằng phương pháp kiểm tra tia lửa điện (spark testing) là một phương pháp không phá hủy (nondestructive testing) được sử dụng để phát hiện các lỗ thủng, khe hở, hoặc khuyết tật tại mối hàn, đặc biệt ở những khu vực khó tiếp cận như mối hàn tại ống xuyên (pipe penetrations) hoặc các góc hẹp. Phương pháp này được quy định trong tiêu chuẩn ASTM D6365 (Standard Practice for the Nondestructive Testing of Geomembrane Seams using the Spark Test). Tiêu chuẩn này áp dụng cho các mối hàn màng HDPE có độ dày từ 0.5mm đến 3mm, thường được sử dụng trong các công trình chống thấm như bãi chôn lấp, hồ chứa, hoặc hệ thống xử lý nước thải.
