Abstract: This is to provide an aqueous metal surface treatment agent for a lithium ion secondary battery which can improve interlaminar adhesiveness between a metal member and a resin coating layer such as a film or a coated film, and solvent resistance without using trivalent chromium. The aqueous metal surface treatment agent for a lithium ion secondary battery comprises a polyvinyl alcohol resin containing 2 to 15 mol % of a 1,2-diol structural unit represented by the formula (1): Having a degree of saponification of 90 to 99.9 mol % and an average degree of polymerization of 250 to 3000; and a metallic crosslinking agent.

Abstract: This is to provide an aqueous metal surface treatment agent for a lithium ion secondary battery which can improve interlaminar adhesiveness between a metal member and a resin coating layer such as a film or a coated film, and solvent resistance without using trivalent chromium. The aqueous metal surface treatment agent for a lithium ion secondary battery comprises a polyvinyl alcohol resin containing 2 to 15 mol % of a 1,2-diol structural unit represented by the formula (1): Having a degree of saponification of 90 to 99.9 mol % and an average degree of polymerization of 250 to 3000; and a metallic crosslinking agent.

Abstract: This is to provide an aqueous metal surface treatment agent for a lithium ion secondary battery which can improve interlaminar adhesiveness between a metal member and a resin coating layer such as a film or a coated film, and solvent resistance without using trivalent chromium. The aqueous metal surface treatment agent for a lithium ion secondary battery comprises a polyvinyl alcohol resin containing 2 to 15 mol % of a 1,2-diol structural unit represented by the formula (1): having a degree of saponification of 90 to 99.9 mol % and an average degree of polymerization of 250 to 3000; and a metallic crosslinking agent.

Abstract: A container is provided comprising a casing, a set plate closing the lower end of the casing and a lock ring that fastens the set plate onto the casing. The casing is provided with a radial outer flange formed around an open end of the main body thereof. The radial outer flange and the outer periphery of the set plate are each provided with three stop projections and three notches. The radial outer flange is further provided with three biasing projections and the outer periphery of the set plate is further provided with three engagement rims. The members of each threesome are arranged at a regular angular interval and each threesome is arranged at different angular phase positions from those of the other threesomes. The outer periphery of the lock ring is provided with three engagement lugs that project inwardly at a regular angular interval.

Abstract: Provided is a container having a detachable lid that is suitable for use as a reusable oil filter and can improve the disassembling and assembling efficiency and minimize the weight. The container 1 suitable for use as an oil filter essentially consists of a casing 2, a set plate 3 closing the lower end of the casing 2 and a lock ring 4 that fastens the set plate 3 onto the casing 2. The casing 2 is provided with a radial outer flange formed around an open end of the main body thereof 22. The radial outer flange 23 is provided with three stop projections 25, three notches 26 and three biasing projections 27, the members of each threesome being arranged at a regular angular interval and each threesome being arranged at different angular phase positions from those of the other threesomes.

Abstract: A filter device includes a tubular casing [10] with a closed bottom, a filter element [20] received within the casing [10], a lid [30] which closes an open end of the casing [10], and has a communication hole communicating the inside and outside of the casing [10] with each other, and a fastening member [50] fastening the casing [10] and the lid [30] together. A gap is formed between a peripheral wall [14] of the open end portion of the casing [10] and a peripheral surface [32] of that portion of the lid opposed to the peripheral wall [14].

Abstract: A spring 15 is crimpingly fixed to an element holding plate 14 of the fluid filter. Since the spring 15 is crimpingly fixed to the element holding plate 14, a material having a high elastic limit can be freely selected for the spring 15. At the assembling time, the spring 15 can be prevented from yielding to be elastically deformed, even when the size between the upper end of the element 12 and the crest of the filter case 11 fluctuates. As a result, it is possible to provide a fluid filter which requires no high sizing accuracy of the individual parts composing the fluid filter at the assembling time so that it can be easily assembled.

Abstract: A valve indicative of the concentration of an emission component contained in exhaust from an internal combustion engine is outputted by an exhaust concentration sensor arranged in the exhaust system of the engine, and the value is compared with a predetermined reference value, followed by obtaining a ratio of a first time period during which the sensor output value exceeds the predetermined reference value to a second time period during which the sensor output value is less than the reference value. The acceptability of the exhaust concentration sensor is determined based on the obtained ratio. Preferably, the sensor is judged to be of acceptable quality when the ratio lies within a predetermined range and defective when the ratio lies outside the predetermined range.