The NEW Set Form NF method is a construction technique that offers excellent safety during installation, as well as preventing volume shrinkage of the foam after filling, making it a "safe," "reliable," and "high-performance" method!
The "NEW Set Form NF Method" is a backfill injection method that fills the voids behind the lining concrete in repair work for existing tunnels using a rigid foam polyurethane called "Set Form." It was newly registered with the Ministry of Land, Infrastructure, Transport and Tourism's New Technology (NETIS) in December 2024 (KT-240144-A). 【Features of the NEW Set Form NF Method】 - Over 1,000 successful cases using 40 times expanded polyurethane. - Responsible construction system supported by more than 30 member companies. - The average increase rate of final injection volume is 132%, making it economical. - Uses HFO (hydrofluoroolefin) as a foaming agent, an environmentally friendly non-fluorine product. - Improved dimensional stability due to HFO remaining stable within the foam. - Possesses isocyanurate bonds and uses HFO as a foaming agent, achieving high thermal decomposition temperature and low internal temperature to prevent smoking accidents. - Compact injection equipment eliminates the need for wide access routes or land. - Can be operated with batteries, making it suitable for narrow construction sites. *For more details, please download the PDF or feel free to contact us.
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【Other Features】 ■ This non-fluorocarbon product uses HFO, the industry's first blowing agent, which is environmentally friendly, has minimal volume shrinkage, suppresses internal temperature rise, and prevents smoke accidents. ■ It expands and hardens up to 40 times and cures in one minute, allowing for construction without being affected by groundwater. Additionally, it reduces the risk of leakage accidents during injection, ensuring safe construction. ■ It can be applied using a battery, making it possible to work in narrow areas where generators cannot be brought inside, in locations where electrical wiring work is difficult, and in places where the operation of generators with internal combustion engines is not feasible. ■ With over 1,000 successful applications of 40 times expanded polyurethane, it holds the number one record in domestic achievements. ■ A responsible construction system backed by over 30 domestic association members allows for high-quality construction anywhere in the country. ■ The average increase rate of the final injection volume is 132%, making it more economical compared to other injection materials. ■ It features isocyanurate bonds with excellent heat resistance and flame retardancy, making it a safe construction method with no recorded smoke accidents in tunnel backfill injection work. ■ The compact injection equipment does not require wide access roads or land, allowing for easy construction. *For more details, please download the PDF or feel free to contact us.
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Detailed information
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Appearance of NEW set form NF construction method
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Waterway tunnel construction example
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Compact injection equipment
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Battery storage unit
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Foaming condition of the set form (40 times product)
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Our company serves as the core company responsible for the chemical business of the Nisshinbo Group, providing high-performance resin materials "Carbodiolite," high-performance insulation materials "Rigid Polyurethane Foam," fuel cell "Separators," and high-purity high-strength carbon materials "Glass-like Carbon." Based on the extensive experience cultivated in each of these areas, our strength lies in our matching technology that provides the materials our customers need. By unlocking the infinite potential of materials and contributing to the realization of a future that considers the Earth and its people through solving our customers' challenges, this is our mission.
