摘要:
A method of manufacturing a filter medium that has a PF value that exceeds 32, the PF value calculated from the pressure loss and the collection efficiency of the filter medium according to the following formula: PF=[−log(permeability (%)/100)/(pressure loss (Pa)]×1000[Formula 1] in which permeability (%)=100−collection efficiency (%). In this method, 380 ml or more of a liquid lubricant at 20° C. is added per 1 kg of a PTFE fine powder, this compound is processed into a tape shape and elongated to obtain a PTFE porous film, and an air permeable support member is heat laminated to at least one surface of the PTFE porous film.
摘要:
An air filter medium comprising a porous polytetrafluoroethylene film and an air-permeable support member laminated on at least one surface of said porous film and having a PF1 value exceeding 22, which is calculated according to the following formula: PF1=[−log(Penetration (%)/100)/Pressure loss (mmH2O)]×100 in which the penetration (%)=100−Collection efficiency from a pressure loss (unit: mmH2O) measured when an air is flowed through the air filter medium at a flow velocity of 5.3 cm/sec. and a collection efficiency (unit: %) measured using dioctyl phthalate having a particle size of 0.10 to 0.12 &mgr;m. This air filter medium has a low pressure loss and a high collection efficiency.
摘要:
An air filter medium is provided with a porous film made from a polytetafluoroethylene, and a non-woven fabric laminated on at least one side of the porous film. The non-woven fabric has an apparent density satisfying the following equation: apparent density (g/cm3)
摘要翻译:空气过滤介质设置有由多三氟乙烯制成的多孔膜和层叠在多孔膜的至少一侧上的无纺布。 无纺布的表观密度满足下列等式:表观密度(g / cm 3)<1.5×(基重(g / m 2)/ 1000)+0.11。 过滤介质是通过包括由聚四氟乙烯形成的多孔膜制造的第一工序的工序制造的,第二工序是将多孔膜的至少一侧的多孔膜的至少一面层压到经过 非粘合剂处理。 过滤介质用于制造空气过滤器组件,而空气过滤器组件用于制造空气过滤器单元。
摘要:
The present invention provides a culture container and a cap for a container having a ventilation filter medium or a medium similar thereto that can exchange carbon dioxide gas in the culture container with atmospheric air, and prevent the contamination of sterilized culture medium inside the culture container with fungi, mites, and the like. A culture bottle includes a bottle unit, and a cap that is mounted on an opening. The cap includes a cap unit, and a ventilation filter medium. A hole is provided in the cap unit. The ventilation filter medium includes a plurality of micropores having a pore diameter between 0.1 and 50 micrometers, and is mounted on the hole.