The ideal characteristics for a cleanroom swab used to clean high-purity optical substrates with methanol, such as Foamtec’s MiraSWAB, include:
- Two-layer tip construction: The swab should have a two-layer tip construction consisting of microfiber on the outside and polyester on the inside. This design allows for effective cleaning and particle removal while ensuring enough methanol is held to dampen the swab. This prevents excessive saturation and ensures controlled cleaning without leaving behind any residue.
- Microfiber outer layer: The swab tip’s microfiber outer layer is designed to attract and capture particles effectively. It has a high affinity for contaminants, allowing for efficient removal of particles from the optical substrates. This helps in achieving a “smudge-free” cleaning result.
- Polyester inner layer: The polyester inner layer of the swab tip provides solvent-holding and cushioning properties. It acts as a reservoir for holding the methanol, ensuring the swab is damp enough to clean the optical substrate effectively. The cushioning properties of the polyester layer help prevent any scratches or damages during the cleaning process.
- Controlled methanol retention: The two-layer construction enables the swab to hold just enough methanol to dampen the tip. This controlled retention of methanol ensures that the optical substrate is swabbed with a damp swab, allowing for effective cleaning and particle removal without excessive moisture. This helps in preventing smearing or streaking on the optical surfaces.
- Laundered via proprietary process: MiraSWABs are laundered using a proprietary process that minimizes particle or residue contamination. This ensures that the swabs are clean and free from additional contaminants that could potentially impact the cleaning process or introduce further particles onto the optical substrate. By incorporating these characteristics, Foamtec’s MiraSWAB, with a two-layer tip construction fabricated with microfiber on the outside and polyester on the inside, enables effective and controlled cleaning with methanol. It ensures “smudge-free” removal of particles from high-purity optical substrates, leaving behind clean and clear surfaces. The polyester inner layer also provides solvent-holding and cushioning properties to ensure scratch-free cleaning performance.