SW-857B High Absorption Cleanroom Polyester Swab

Product Overview

The SW-857B is a high-absorption cleanroom polyester swab with a high-absorbency knitted polyester fiber head mounted on an extended 160mm handle, built for precision cleaning applications in electronics manufacturing, semiconductor assembly, and optical instrument servicing where both high liquid absorption capacity and extended reach beyond a standard 100mm handle are simultaneously required. It shares the same head dimensions as the SW-847B but operates in a distinct set of cleaning scenarios: while the 100mm SW-847B suits bench-level cleaning tasks where the cleaning target is immediately accessible, the SW-857B's 160mm handle addresses situations where the cleaning zone is recessed inside equipment housings, deep connector bodies, or instrument enclosures that a shorter swab cannot reach without the operator's hand entering the restricted area.

The swab head measures 17mm in length, 6.8mm in width, and 2.8mm in thickness. The high-absorbency polyester fiber structure enables rapid uptake of IPA, ketone-based solvents, and water-based cleaning agents, locking absorbed liquid within the fiber matrix and releasing it evenly against the substrate during the cleaning stroke. This absorption-then-release behavior is particularly valuable in deep-reach cleaning tasks where re-loading the swab between passes requires withdrawing it from the equipment enclosure — high liquid retention per pass reduces the number of swab extraction and re-loading cycles required to complete a thorough deep-cavity clean.

Extended Handle Design & Chemical Compatibility

The 160mm polypropylene handle with 3.2mm width and thickness maintains rigidity over its full length without flexing under axial cleaning force, delivering transmitted wiping pressure to the polyester head at depth without energy loss through handle deflection — a mechanical requirement that limits the effective use of longer but flimsier handle materials in deep-reach cleaning tasks. The extended handle also keeps the operator's hand outside the equipment enclosure during cleaning, supporting contamination control protocols that restrict hand entry into cleanroom equipment interiors.

The polyester fiber is chemically compatible with acetone, MEK, toluene, IPA, and commercial cleaning formulations used in electronics and semiconductor manufacturing, and demonstrates strong moisture absorption and decontamination performance across repeated solvent cycles without structural degradation. The swab does not shed fibers or leave chemical deposits on cleaned surfaces, maintaining low particle and low NVR performance in cleanroom operating conditions. Package contains 100 pieces.

Industry Applications & Use Scenarios

The SW-857B is applied in electronics manufacturing, medical device production, semiconductor equipment maintenance, optical instrument cleaning, and precision assembly workflows where the cleaning target is inaccessible with standard-length swabs. Specific use scenarios include cleaning deep connector housings in medical device assemblies, removing flux residue from PCB areas inside partially-assembled device enclosures, wiping optical component surfaces inside instrument housings without requiring instrument disassembly, maintaining semiconductor process equipment interior contact surfaces, and cleaning solvent-exposed areas in enclosed precision mechanical assemblies in aerospace and defense manufacturing. When a procurement team is selecting between SW-847B and SW-857B, the deciding factor is access geometry: if the cleaning target is more than 80–100mm from the nearest access point, the SW-857B is the appropriate choice.