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Poreflon® Overview
Extruded and expanded polytetrafluoroethylene (PTFE) was developed by Sumitomo Electric Industries in 1960 as an advanced wire and cable insulating material. Possessing superior chemical and thermal resistance properties, PTFE ensured the high dielectric strength and longterm physical stability demanded by high performance wire insulation.

Further development revealed that by carefully controlling the base materials and manufacturing processes, a wide range of microporosity and void volumes could be repeatedly and consistently produced. By varying the void volume, thickness, open porosity and strength, Poreflon® materials were processed into form factors optimized for filter media, moisture barriers, vents, gas diffusers, sealing materials, and a wide range of industrial and biotechnical applications.
After more than 45 years of continuous development, Sumitomo Electric offers the widest range of expanded PTFE performance capabilities.
Controlled open porosities between 25 & 90%
Micron ratings of 10µM down to nanofiltration
Narrowspread IPA bubble points of 10 to over 470 kPa
Naturally hydrophobic or with hydrophilic surface modification
Multiple form factors, including flat sheet, hollow fiber, – preconfigured modules, rope, tape & many others
Precision manufactured in Japan, Poreflon® products are sold and distributed in North America through Sumitomo Electric Interconnect Products, a wholly-owned subsidiary of Sumitomo Electric Fine Polymer, Inc. With over 25 years of supply chain experience in electronic and specialty materials industries, Sumitomo Electric Interconnect Products has the technical knowledge and delivery expertise to support all aspects of specifying Poreflon® technology into your products. Let us add value to your end products, and give you the competitive edge you, and your customers demand.

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