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 / furan> Overview > Application > Permacol Furan No Bake System > Launch. FA / UF Binders Table > Launch. FA / PF and FA / PF / UF Binders Table < Previous Overview / Furan Resin The Permaset range of cold setting binders is based on well proven Furan technology and available in all the popular grades. Urea formaldehyde modified resins in a range of nitrogen contents from 1.0 - 13.0% or phenolic Furans utilising our phenol formaldehyde co-polymer expertise. In addition special phenol and nitrogen free resins or high reactive grades available in our Permacol range. • Range of nitrogen and water contents available • Easy adaptability • Excellent dimensional accuracy • Low sand to metal ratio due to high strength • Unbeatable shake-out • Ease of reclamation - up to 95% even on low cost plant • Good binder stability Application Most resins are suitable for use on both new and reclaimed sand ildeally at additions of 0.8 - 1.4%. Due to the range of nitrogen contants available, the resin can be chosen, which gives the most metallurgically and economically acceptable system. Catalyst choice is important because it can significantly affect binder performance. Strip times are controlled by type, concentration and amount of catalyst used. Addition rates can vary between 25 - 75% based on resin weight, but optimum levels for both environment and performance are 25 - 50%. Strip times from 1 minute to more than 120 minutes are achievable by proper catalyst selection and application. Sand quality and selection can also greatly affect the ultimate performance of any Furan system. New sand with a neutral pH, low fines and a rounded grain give the best strength characteristics, although most other silica, zircon or chromite sands can be used with excellent results. When utilising a reclaimed sand system the following should be controlled: Grain size & distribution fines or oversize particles should be removed and a sieve grading as near to the new sand as possible maintained. Loss-on-ignition this should be as low as possible and ideally below 3%. Sand temperature to avoid friable moulds and low strengths temperatures below 30ºC should be maintained. The ideal range is 20 - 25%. Eurotek's extensive range of Furan resins can be split into two main ranges as detailed below ( tables will launch in an external window ): 
Launch Table (1 FA / UF Binders )
Launch Table (2 FA / PF and FA / PF / UF Binders )All binders in table ( 1 ) plus Permaset 841, 843 and 846 can be used in conjunction with our lower sulphur catalyst range. This is not an exhaustive list of resins available and the recommendations included are for general guidance only. Should further advice be required, our Technical staff are on hand to help with specific application information.
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