NC270WR VOC-Free No Clean Liquid Flux Features: - VOC-Free - Lead-Free Compatible - Halide-Free - Low Post Process Residues - Broad Process Window - Excellent Wetting Description: NC270WR is a VOC-free water-based, halide-free, no-clean liquid flux formulated to offer a very wide process window allowing for extremely good wetting, even to difficult-to-wet materials. 270WR offers a broad activation range, proving to be an excellent flux for a variety of process parameters and applications, including lead-free wave soldering with tin-silver- copper, tin-silver, tin-copper, and other alloys. 270WR offers low post-process residues and has proven to reduce preventative maintenance requirements for spray fluxing applications. In addition, 270WR offers low-fuming and fast solvent evaporation for a VOC-free flux. 270WR is designed to be a no-clean, non-visible residue flux, which can be cleaned if critical to the product application. Application: - NC270WR is ready to use directly from the container for spray systems. - When spray fluxing, it is imperative that proper flux coverage and uniformity be achieved and maintained. A dry flux coating of 500 to 1500 micrograms per square inch is necessary. - When complete nitrogen sealed wave solder equipment is used, it is generally necessary to apply slightly more flux than normal as a result of excess drying due to the extended length of the equipment. Thermal Profile: RATE of RISE PROGRESS THROUGH PCB TOP SIDE TEMP COOLDOWN 2-3 C / SEC MAX 66C - 77C ( 150 - 170F ) 90C - 125C (194F - 257F ) 4C 40 SECONDS JUST BEFORE WAVE Cleaning: NC270WR can be cleaned, if necessary, with water, and enhanced cleaning can be achieved through the use of a saponifier. Deionized water is recommended for the final rinse. A temperature of 38C - 65C (100 - 150F) is sufficient for removing any residues. An in-line or other pressurized spray cleaning system is suggested, but is not required. Handling: - NC270WR has a sealed shelf life of nine (9) months at room temperature. - Keep away from sunlight as it may degrade the product. - NC270WR is shipped ready to use no mixing is necessary. - Do not mix used and unused chemical in the same container. Reseal any open containers. - Optimal storage condition is 25- 30C (75 - 85F), acceptable storage conditions range from 4- 40 C (40 - 100F). Safety: - Use with adequate ventilation and proper personal protective equipment. - Refer to the accompanying Safety Data Sheet for any specific emergency information. - Do not dispose of any waste materials in non-approved containers. Physical Properties: Parameter Value J-STD-004B ORL0 Visual Colorless to light yellow Solids Content 3.76% Typical Acid Number 34.54 mg KOH per gram flux Typical Specific Gravity 1.01 Typical pH (1% solution /water) 2.59 Typical Corrosion Testing: Parameter Requirements Results Copper Mirror (24 hrs 25C,50%RH) IPC-TM-650-2.3.32 Low Halide Test (Silver Chromate) IPC-TM-650-2.2.33 Pass Surface Insulation Resistance: Reference Property Pass-Fail Criteria Results Control Coupons >1E+9 at 96 and 168 hrs 2.12E+10 and 1.70E+10 Pass IPC-TM-650 Sample Coupons pattern up >1E+8 at 96 and 168 hrs 1.70E+10 and 1.49E+10 Pass method 2.6.3.3 Sample Coupons pattern down >1E+8 at 96 and 168 hrs 1.06E+10 and 1.07E+10 Pass 85C / 85% R.H. Post-test visual inspection No dendrite growth or corrosion Pass Bellcore GR-78 Sample Coupons Pattern up >1E+10 2.33E+10 Pass 35C / 85% 4 days Sample Coupons Pattern down >1E+10 5.91E+10 Pass Electromigration: Test Conditions Specification Results Electromigration Bellcore 65C/85% R.H. 500 hrs Pattern up Rf/Ri > 0.1 2.63E+10 / 3.68E+10 Pass GR-78 Flux Requirements 65C/85% R.H. 500 hrs Pattern down Rf/Ri > 0.1 3.00E+10 / 1.57E+10 Pass Canada +1-514-494-2000 USA +1-401-463-5605 Mexico +52-656-630-0032 Europe +44-1737-222-258 Asia-Pacific +86-755-2993-6487 India +91-80-41554753 info aimsolder.com www.aimsolder.com AIM IS ISO9001:2008 & ISO14001:2004 CERTIFIED The information contained herein is based on data considered accurate and is offered at no charge. Product information is based upon the assumption of proper handling and operating conditions. All information pertaining to solder paste is produced with 45-micron powder. Liability is expressly disclaimed for any loss or injury arising out of the use of this information or the use of any materials designated. Please refer to