Abstract: An object of the present invention is to provide a magnetic field forming device for active water capable of uniformly forming a high magnetic field free from any unevenness in its intensity, activating a fluid regardless of the orientation of magnetic polarity of the magnets, bringing about excellent assembling efficiency not requiring assembling while checking the orientation of the magnets, being manufactured at a high product yield ratio without occurrence of defective products resulting from a difference in the orientation of the magnets, remarkably easily taking out the magnets without use of any exclusive special tool, and removing rust and stains adhered to the magnets by wiping off the magnets one by one, the maintenance efficiency of which is excellent.

Abstract: An object of the present invention is to provide a magnetic field forming device for active water capable of uniformly forming a high magnetic field free from any unevenness in its intensity, activating a fluid regardless of the orientation of magnetic polarity of the magnets, bringing about excellent assembling efficiency not requiring assembling while checking the orientation of the magnets, being manufactured at a high product yield ratio without occurrence of defective products resulting from a difference in the orientation of the magnets, remarkably easily taking out the magnets without use of any exclusive special tool, and removing rust and stains adhered to the magnets by wiping off the magnets one by one, the maintenance efficiency of which is excellent.

Abstract: A binder for a magnetic recording medium comprising a hydroxy-group-terminated polyurethane resin prepared by reaction of a polycarbonate-polyol, a chain-extender, and an organic diisocyanate; (A) said polycarbonate-polyol comprising poly(cyclohexane-1,4-dimethanol carbonate)-polyol as a constituting component in an amount of from 20 to 80% by weight, and (B) said chain-extender being a compound having a molecular weight of not more than 1,000 and having two or more amino or hydroxyl groups in the molecule.