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cleaning critical surfaces
FirmWIPE Wiper w/hand

FirmWIPE®
Wipers

Description

FirmWIPE® is constructed from an open-cell ester-based polyurethane foam which has undergone a special felting process. FirmWIPE® offers fiber-free wiping in applications where durability and fast wicking, without dripping, are desirable. FirmWIPE® is available in both Class 100 and Class 1000 configurations. Due to its ability to conform to metal mask surfaces, FirmWIPE® enables excess paste to be thoroughly removed while minimizing abrasion to the emulsion. Its unique pore structure makes it ideal for cleaning metal masks used to print LTCC components, capacitors, EL, OLED, and Plasma Display Panels.

Application Advantages
Foamtec Open-cell polyurethane structure allows for fiber-free wiping.
Foamtec Excellent pick-up of Thick Film inks and solder paste.
Foamtec High density construction and sponge-like properties make it ideal for particle sensitive metal mask cleaning operations.
Foamtec High incineration rate to yield low ash for precious metal reclamation in Thick Film applications.
foamtec Open-cell, felted foam structure allows for controlled transfer of solvent to optimize cleaning of Thick Film screens.
foamtec Ester-based chemistry and felted construction enable broad solvent compatibility.
foamtec Uniform porosity allows for excellent contamination pickup.

Cleanliness All of the below are tested via standard IEST methods.
Particle Generation (0.5 ยต) Class 100 Class 1000
Wet Test (millions/m2) < 4.5 x 106 m2 < 2.5 x 107 m2
Absorbency (ml/m2)
Isopropyl Alcohol ≤3000
Time to 1/2 Absorption (seconds) ≤5
Extractables (ppm)
Deionized Water ≤10 ≤20

Part Numbers
Part No. Dimensions Process Package UOM Case UOM
HT4331 .375” x 2” x 3” Class 1000 10 wipers/bag 100 bags/case
HT4334 .375” x 3” x 4” Class 100 10 wipers/bag 100 bags/case
HT4346 .375” x 4” x 6” Class 100 10 wipers/bag 100 bags/case