| 摘要 |
PURPOSE:To efficiently produce a corrosion preventive tape having an electrolytic corrosion preventive effect by sticking belt-like metallic foil having scores for rupturing at every specified interval to part of the surface of a rubber or plastic sheet on which a pressure-sensitive adhesive agent is coated. CONSTITUTION:The pressure-sensitive adhesive agent 43 is coated by a coater 44 on one face of the endless-belt like rubber or plastic sheet 41 let off from an un-winding drum 42 in the 1st stage alpha. On the other hand, the scores for rupturing are formed at every specified interval to one or both faces of the galvanic anode metallic foil 45 for electrolytic corrosion prevention which has the width of preferably <=2/3 the width of the above-mentioned sheet and is like a continuous belt by means of a cutter 47 and a receiving roller 48 in the 2nd stage beta. The above-mentioned metallic foil 45 is continuously stuck by a roll 49 for press contact to part of the above-mentioned sheet 41 and the sheet is taken up on a bobbin 50 for a finished product in the 3rd stage gamma. The resulted corrosion preventive tape T is satisfactorily deposited with good waterproofness by the substantial margin for overlapping in the stage of the treatment for winding the same onto a material to be protected and the above- mentioned metallic foil 45 ruptures to small pieces 45a when elongated to serve as the corrosion preventive electrode. |
