QUALITEK 32+ NO CLEAN FLUX CORPORATE HEADQUARTERS USA: 315 Fairbank St. Addison, IL 63-628-883 FAX 63-628-6543 EUROPE UK: Unit 9 Apex Ct. Bassendale Rd. Bromborough, Wirral CH62 3RE 44 151 334 888 FAX 44 151 346 148 ASIA-PACIFIC HEADQUARTERS SINGAPORE: 6 Tuas South St. 5 Singapore 63779 65 6795 7757 FAX 65 6795 7767 PHILIPPINES: Phase 1 Qualitek Ave. Mariveles, Bataan Philippines C-216 6347 935 4163 FAX 63475613717 CHINA: 3B/F, YiPa Print Bldg. 351 # JiHua Rd., Buji Shenzhen, China 518112 86 755 28522814 FAX 86 755 28522787
Description Qualitek 32+ is a homogenous mixture of halogen-free, low solids organic flux designed for wave soldering and surface mount PCB assemblies. 32+ exhibits excellent wetting and fluxing activities leaving virtually no residue on the assembly after soldering. 32+ eliminates the expense of cleaning without surface insulation resistance degradation. Main Features Excellent wetting on virtually all types of substrates Low residue Rosin/Resin free Compatible with Lead-free & Leaded Solder Systems Technical Data Specification Test Method Flux Classification ORL IPC-J-STD-4B Copper Mirror No removal of copper film IPC-TM-65 2.3.32 Corrosion Pass IPC-TM-65 2.6.15 Flash Point 53 F SIR Pattern up 3.44 1 11 ohms IPC-TM-65 2.6.3.3 Pattern down 2.56 x 1 11 ohms Acid Value 27.5 3.5 IPC-TM-65 2.3.13 Specific Gravity.84 ±.4 Solids Content 2.6 3.4 IPC-TM-65 2.3.34 (this portion intentionally left blank) Page 2 of 5
Applications TECHNICAL DATA SHEET Flux Application For mass wave soldering of OSP and plated circuit boards, spray, foam or wave fluxing can be utilized to apply this flux. Flux deposition density and uniformity are critical to successful use of low solids no-clean flux. If foam fluxing, the foam fluxer should be supplied with compressed air, which is free of oil and water. The flux tank should be full at all times. The surface of the flux should be 1-½ inches above the top of the flux aerator, or flux stone. Pressure should then be adjusted to produce the optimum foam height with a fine uniform foam head. After fluxing, an air knife should be used to remove excessive flux from the assembly. Uniformity of the spray flux coating can be visually checked by running a tempered glass plate (usually supplied by machine manufacturer) through the spray and preheat sections, and inspected before going across the wave. OPERATING PARAMETERS Amount of flux TYPICAL LEVEL Foam, Wave: 1-2 µg/in 2 solids Spray: 75-15 µg/in 2 solids Foam Fluxing Parameters Foam Stone Pore Size 2-5 µm Flux Level Above Stone 1-1 ½ inches (25-4mm) Chimney Opening 3/8-1/2 inch (1-13 mm) Air Pressure 1-2 psi Top Side Preheat Temperature 19-23 F (85-11 C) Bottom Side Preheat Temperature 65 F (35 C) higher than topside Conveyor Speed 4-6 feet/minute(1.2-1.8 meters/minute) Contact Time in the Solder (including Chip & Lambda) 2.5-4.5 seconds Solder Pot Temperature Sn96.5/Ag3.5 5-53 F (26-276 C) Sn95/Ag5 536-565 F (28-296 C) Sn99.3/Cu.7 51-53 F (265-276 C) SnAgCu 52-53 F (271-276 C) Sn95/Sb5 536-565 F (28-296 C) TYPICAL Lead Free Wave Solder Profile (SNAGCU) Temp ( C) 3 274 25 2 Bottom Side Preheats: 12-145 C for 6 sec Time in Wave = 2.5 to 5 Sec 15 C Max 15 Top Side Preheats: 85-11 C for 6 sec 1 Preheat Zone 5 Flux Zone Time 15 3 5 4 6 75 9 2 135 14 5 16 165 18 183 84 185 19 15 1 1 17 1 1 Time (Sec) 95 2 21 225 24 Page 3 of 5
TYPICAL Leaded Wave Solder Profile (Sn63/Pb37) T e m p ( C ) 3 2 4 2 5 T i m e i n W a v e = 3. 5-4 S e c B o t t o m S i d e P r e h e a t s : 1 1-1 4 C f o r 6 s e c 1 5 C M a x 2 1 5 T o p S i d e P r e h e a t s : 7 7-9 4 C f o r 6 s e c 1 M a x R a m p U p : 2 C / s e c P r e h e a t Z o n e 5 F l u x Z o n e T im e 1 5 3 4 5 6 7 5 9 1 5 1 2 1 3 5 1 4 1 5 1 6 1 6 5 1 7 1 8 1 8 3 1 8 4 1 8 5 1 9 1 9 5 2 2 1 2 2 5 2 4 T i m e ( S e c ) Process Control Control of flux during use is necessary to assure consistent flux deposition on the circuit board. Due to the very low solids content of no clean fluxes, specific gravity is not an accurate measure for assessing solids content. Monitoring and controlling acid number by titration is recommended for maintaining the proper flux concentration. Control of the flux can be achieved with 3A thinner to maintain fluxing activity. Over time debris and contaminants may accumulate in the flux reservoir. Therefore, periodically replacing the flux and cleaning the reservoir is recommended for consistent performance and minimizing debris build-up. Cleaning 32+ is a no clean formulation, therefore, the residues do not need to be removed for typical applications. If residue removal is desired, the use of Everkleen 15 Buffered Saponifier with a 5-15% concentration in hot 6 C (14 F) will aid in residue removal. Storage & Shelf Life 32+ Liquid Flux should be stored in a 65-8 F environment away from direct heat and flame. Shelf life is 2 years from date of manufacture. Page 4 of 5
Disposal 32+ contains hazardous ingredients therefore the flux should be disposed of in accordance with federal, state, local & federal authority requirements. Packaging 32+ No Clean Liquid Flux is available in 1 Gallon/1 Liter containers 5 Gallon/5 Liter containers 55 Gallon/2 Liter containers Qualitek is a brand of Qualitek International, Inc. Page 5 of 5