PTFE filter medium TEMISH™

dustairhigh-efficiency

Overview
TEMISH™ is a PTFE porous membrane filter material designed for lightweight, sterilization-resistant and reusable filters for N95 medical masks. It is a porous membrane composed of fine fibers that physically captures dust and viruses. Finished products can obtain NIOSH certification in the U.S.

Features

• Can meet N95 standards according to NIOSH and ASTM F2100-11 for blood resistance and flammability.
• Filter collection efficiency ranges from 95% to ~99.99995%; collection characteristics are more stable than general electret filters.
• Porous membrane of fine fibers provides a balance between air permeability and collection efficiency.
• PFE, BFE and VFE show more than 99% collection efficiency for relevant particle size ranges.
• Stable properties in high-humidity environments and good storage stability.
• Lighter and more comfortable than ordinary electret N95 filter materials.

Applications
CBRN masks
Industrial masks (P100, R100, N100, P3)
Medical masks (N95, N99, FFP2, FFP3)

Specifications・Structures
Specifications
Part number | Thickness [mm] | Pressure loss [Pa] | Collection efficiency [%] | Measured particle sizes [μm]
NTF9307-L03 | 0.32 | 70 | ≥95 | 0.1–0.2
NTF9310-H13 | 0.32 | 100 | ≥99.5 | 0.1–0.2
NTF9314-H14 | 0.32 | 140 | ≥99.95 | 0.1–0.2

Remarks: Pressure loss and collection efficiency were measured at 5.3 cm/sec. Data are measured values and do not guarantee performance.

Structures
By controlling the pore size of the PTFE porous membrane, pressure drop and collection efficiency are optimized.

Characteristics
TEMISH™ maintains high collection efficiency after sterilization and has collection characteristics more stable than common N95 electret filters.

Autoclave sterilization test results
Heating in an autoclave at 120°C for 20 minutes. Measurement of filter collection efficiency and pressure drop (Linear velocity: 5.3 cm/sec; particle size: DEHS 0.1 μm). Data are measured values and do not guarantee performance.

Alcohol disinfectant spray cycle test (method)

• 1) Apply 5 pushes of alcohol sanitizer (75% concentration) to the filter surface.
• 2) Dry at room temperature overnight.
• 3) Measure filter collection efficiency and pressure drop (Linear velocity: 5.3 cm/sec; particles: DEHS 0.1 μm).
• 4) Repeat steps 1–3 for cycles.

Technical specifications

• Product series: TEMISH™ (PTFE porous membrane filter material).
• Primary sterilization compatibility: Autoclave (120°C for 20 minutes) and ethylene oxide gas sterilization.
• Representative part numbers and key values: NTF9307-L03 (thickness 0.32 mm; pressure loss 70 Pa; collection efficiency ≥95% for 0.1–0.2 μm), NTF9310-H13 (0.32 mm; 100 Pa; ≥99.5%), NTF9314-H14 (0.32 mm; 140 Pa; ≥99.95%).
• Measured particle sizes for collection efficiency: 0.1–0.2 μm (PFE measurement basis indicated).
• Test measurement conditions: Linear velocity 5.3 cm/sec; particle type for tests: DEHS 0.1 μm (where specified).
• Notes: Data are measured values and are not guaranteed performance specifications.