Abstract: The present invention provides an electrode for an electric double layer capacitor which is considerably excellent in adhesive property between an electrode layer and an etched aluminum foil current collector. An electrode for a capacitor, which comprises a current collector, an undercoat layer on the current collector, and an electrode layer on the undercoat layer, wherein the current collector is made of an aluminum foil; the undercoat layer comprises at least electrically conductive particles (P) and a binder (B) in a weight ratio P/B of 0.25 to 2.33, and the binder (B) comprises a fluorine-containing polymer as a main component; and the electrode layer comprises at least a carbon material and a binder.

Abstract: The present invention provides a method of producing an electrode for an electric double layer capacitor, which yields the electrode with an electrode layer having a higher density by calendering treatment. A method of producing an electrode for a capacitor, which comprises at least a current collector and an electrode layer on the current collector, the method comprising the steps of: applying an electrode layer coating material which comprises at least a carbon material, a binder and a solvent, onto the current collector to form an electrode coating layer; drying the electrode coating layer on the current collector to set the amount of the solvent remaining in the electrode coating layer within a range of 5 to 35% by weight of the layer; and subjecting the electrode coating layer after the drying to calendering treatment to yield an electrode layer.

Abstract: An electric chemical capacitor includes first and second electrodes each including a collector 111, 121, a polarized electrode layer 112, 122 and an undercoat layer 113, 123 for bonding the collector and the polarized electrode layer with each other, and a separator put between the first and second electrodes so that the polarized electrode layers 112 and 122 face each other, wherein an end portion of each undercoat layer 113, 123 is located in the same position as or on the outer side of an end portion of the corresponding polarized electrode layer 112, 122, and located on the inner side of an end portion of the separator 130. Thus, the polarized electrode layers can be prevented from peeling from the collector. Further, the undercoat layers can be prevented from abutting against each other, and the undercoat layer of one electrode and the collector of the other electrode can be prevented from abutting against each other.

Abstract: A manufacturing method for an electrode for an electrochemical capacitor according to the present invention comprises a first process (steps S1-S3) for forming a polarizable electrode layer on a current collector, a second process (step S4) for subjecting the front surface of the polarizable electrode layer formed on the current collector, to an embossment work, and a third process (step S5) for flattening the front surface of the polarizable electrode layer as has undergone the embossment work. In this manner, in the invention, the front surface of the polarizable electrode layer undergoes the embossment work, so that the polarizable electrode layer is effectively compressed, and it is consequently permitted to achieve a high volume capacitance of at least 17 F/cm3. Moreover, after the embossment work, the resulting embossment is flattened, so that porous grains contained in the polarizable electrode layer are prevented from falling off, and it is permitted to ensure a high reliability.

Abstract: The method of making an electrochemical capacitor electrode in accordance with the present invention comprises a coating liquid preparing step of preparing a porous layer forming coating liquid containing a solid component including a porous particle having an electronic conductivity and a binder adapted to bind the porous particle, a liquid adapted to dissolve or disperse the binder, and an aggregate made of the solid component, such that the aggregate has a degree of dispersion of 10 to 200 ?m in the coating liquid; a porous layer forming step of applying the porous layer forming coating liquid onto a surface of a collector and then removing the liquid so as to form a porous layer; and a pressing step of pressing the aggregate against the collector by pressing the collector and the porous layer, so as to form a depression and a projection on the surface of the collector formed with the porous layer.

Abstract: The present invention is an electrode for an electrochemical capacitor provided with a collector having electronic conductivity and a porous body layer having electronic conductivity, the porous body layer containing porous particles having electronic conductivity and a binder which is able to bind the porous particles with one another, wherein the content of the porous particles in the porous body layer is in a range from 88 to 92% by mass on the basis of the total amount of the porous body layer, and the porous body layer has an apparent density in a range from 0.62 to 0.70 g/cm3.

Abstract: A first electrode and a second electrode to be used are electrodes each of which has a collector, and a porous material layer with electron conductivity placed between the collector and a separator, and each of which has a configuration wherein the porous material layer includes at least particles of a porous material with electron conductivity, and a thermoplastic resin being capable of binding the particles of the porous material together and having a softening point TB lower than a softening point TS of the separator. A production method includes a thermal treatment step of thermally treating a laminate at a thermal treatment temperature T1 satisfying a condition represented by Formula (1): TB?T1<TS, thereby bringing the collector of the first electrode, the porous material layer of the first electrode, the separator, the porous material layer of the second electrode, and the collector of the second electrode in the laminate into an integrated state.

Abstract: A magnetic paint is extrusion coated to a length of splice jointed webs through a coating head by continuously feeding the length of webs across the head. When a splice joint passes across the head, the head is moved apart from the web before passage and contacted with the web after passage. Objectionable coating portions which are formed as a result of moving the head out of and into contact with the web are scraped off by a scraping roll downstream of the head.

Abstract: A coating method and coating apparatus capable of providing a coated film of improved surface properties free from any streak and color shading and facilitating coating on a sheet of an increased width without causing enlargement of the apparatus and thus complicating its structure. A swirling motion imparting mechanism and an orifice are arranged at a connection between a liquid feed pipe and a coater. Swirling motion is imparted to coating liquid discharged from a pump and then a flow velocity of the coating liquid is immediately increased to a level as high as 200 cm/s or more, the liquid then being fed into a pocket of the coater within 0.1 second or less. This permits shearing to act on the coating liquid, to thereby effectively prevent a variation in viscosity of the coating liquid and flocculation thereof, so that the coated film may be improved in surface properties.

Abstract: An extrusion coating head which is disposed between a drier for performing a non-contact drying operation and a support roll located at the upstream side of and nearest to the drier is designed so that a back edge surface thereof is designed to have an round surface having a radius of curvature R which satisfies the following inequality: 3 mm.ltoreq.R.ltoreq.30 mm, and the entire R-surface portion of the back edge of the coating head is located at a position higher than a tangential line drawn to the front edge surface at a slit-side edge point of the front edge so as to project toward the web side. The running web is coated with the coating liquid by the extrusion-type coating head, and then dried through a non-contact drying process.

Abstract: In a coating method of extruding a coating liquid through a slit of an extrusion-type coating head to coat a running web, at a starting or restarting of the coating, the coating liquid is extruded through the slit of the coating head while the coating head is away from the web, and then the coating is started while a slightly large clearance is kept between the coating head and the web at the upstream side of the coating head, thereafter changing the coating state or arrangement to a steady coating state. Therefore, occurrence of a thicker portion of the coating film on the web at the start of the coating can be prevented. Further, at the end or interruption of the coating, the coating state or arrangement of the coating head is changed from the steady coating state to a state wherein a slightly large clearance is kept between the coating head and the web at the upstream side, and the coating head is moved away from the web to end the coating.