Abstract: A filter unit for removing particulates in a gas to be treated, which unit includes a gas impermeable bulkhead that forms a channel through which the gas advances in the filter unit at least one round, and a filter member laminated on at least one side surface of the bulkhead without closing the channel. The filter unit or filter of the present invention reduces a load on a harm removing equipment, which in turn lowers the cleaning frequency and markedly prolongs the service life of the equipment.

Abstract: A thermostable polymer electrolyte gel containing an acrylonitrile polymer, an electrolyte and a solvent, the acrylonitrile polymer having an acrylonitrile content of from 89 wt % to 98 wt % and meeting the following relationship:1,040,000-(A.times.10,000).ltoreq.B.ltoreq.1,490,000-(A.times.10,000)where A is the acrylonitrile content in wt % and B is the weight average molecular weight of the acrylonitrile polymer, the polymer electrolyte gel having an ion conductivity of 10.sup.-3 S/cm or higher at 20.degree. C., exhibiting the "retention of shape" in a thermostability test, and containing the acrylonitrile polymer in a proportion of from 3 wt % to 9 wt %. The thermostable polymer electrolyte gel can be produced by dissolving an acrylonitrile polymer and an electrolyte in a solvent to prepare a solution of the polymer, and cooling the polymer solution to a temperature of 0.degree. C. or lower.

Abstract: A low-temperature regenerative type moisture absorbing element of fast moisture absorbing and releasing speed, capable of regenerating at 110.degree. C. or less and having a sufficiently high moisture absorbing and releasing performance in spite of small size is provided. A low-temperature regenerative type moisture absorbing element is mainly composed of high moisture absorbing and releasing polymeric compound with the content of salt type carboxyl group adjusted to a specific amount, and further comprises plural gas passages, of which regeneration temperature is 110.degree. C. or less. It is hence possible to provide a moisture absorbing element of small size, high efficiency, and energy-saving type, being excellent in moisture absorbing and releasing performance, and easily capable of removing absorbed moisture at low temperature which was impossible with the conventional moisture absorbing element.