DELO Launches PHOTOBOND PS4140 Liquid Tape for Fixing Fuel Cell Gas Diffusion Layers
TECHWORLD ·
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DELO announced the launch of PHOTOBOND PS4140, a liquid tape for fixing Gas Diffusion Layer (GDL) in hydrogen fuel cells.
The product can be applied in fully automated processes, does not require cutting, and allows immediate post-processing after curing.
DELO said the product is an alternative to existing tape solutions for fuel cell manufacturers and plans to unveil it at Hydrogen Technology Expo 2026, which will be held in Hamburg, Germany, from the 20th to the 22nd.
DELO announced the launch of PHOTOBOND PS4140, a liquid tape for fixing Gas Diffusion Layer (GDL) in hydrogen fuel cells. DELO said it introduced PHOTOBOND PS4140, a Pressure-Sensitive Adhesive (PSA), to replace conventional tape-based methods for fixing GDL in hydrogen fuel cells.
The product can be applied in fully automated processes and allows dispensing shapes to be freely configured. It also eliminates the need for cutting processes and material waste, while enabling immediate post-processing after curing, offering process advantages.
DELO said PHOTOBOND PS4140 provides stable adhesion for commonly used materials in fuel cell stacks. Based on PET/PET substrates, it delivers a peel strength of up to 0.9N/mm, and its glass transition temperature (Tg) is -10°C. DELO emphasized that the product maintains flexibility and stable bonding even in low-temperature environments.
The product was designed to help address the peel loads that are an issue in Roll-to-Roll mass production processes for fuel cells. The product is a one-component system.
The product has a water absorption rate of 0.7 wt.%, and maintains dimensional stability even in continuous high-humidity fuel cell operating environments. It also demonstrated mechanical stability after storage in relevant media under actual operating temperature conditions.
The storage temperature range is 0°C to +25°C. As an option suitable for automated dispensing, the DELO-DOT PN5 pneumatic jet valve was presented. Alternative application methods considered include Slot-die Coating, screen printing, and stencil printing.
The curing method is UV or visible light (VIS), and the curing characteristics are energy-efficient. Under 400nm visible light conditions, it cures in just 5 to 16 seconds depending on the irradiation intensity. The cured surface exhibits instant tack and can be bonded with light pressure. After bonding, the next process can proceed immediately.
Julian Hopf, product manager for energy storage and conversion at DELO, said PHOTOBOND PS4140 is an alternative to existing tape solutions for fuel cell manufacturers. He said PHOTOBOND PS4140 enables precise dispensing, can be used in fully automated processes, cures within seconds, and offers the advantages of a liquid adhesive. He added that the application of PHOTOBOND PS4140 improved the speed, reliability, and resource efficiency of mass production processes compared with existing solutions.
DELO said it will participate in Hydrogen Technology Expo 2026, which will be held in Hamburg, Germany, from the 20th to the 22nd. At Hydrogen Technology Expo 2026, DELO plans to unveil DPHOTOBOND PS4140 and showcase its full portfolio of adhesive and sealing solutions for fuel cell manufacturing.
Source: TECHWORLD · Lee Gwang-jae
Original: https://www.epnc.co.kr/news/articleView.html?idxno=407653
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Source: TECHWORLD
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