| 摘要 |
PURPOSE:To obtain beverage, etc., which are free from bleaching powder smells and forms trihalomethane in lesser amts. only by the ordinary extraction operation without treating city water at the time of extracting coffee, tea, etc., by using the city water and to prevent the turning red of a filter blank material generated at the time of drying the filter blank material by sticking ascorbic acid and/or the salts thereof. CONSTITUTION:Polyamide fibers having a sulfonate group are used as the fibrous filter blank material of the filter for extraction of the beverage, etc., formed by sticking the ascorbic acid and/or the salts thereof to the fibrous filter blank material. |
