Abstract: A screw extruder comprises an extruder body (4) with a bore (4H), and a screw (5) rotatably disposed in the bore (4H). The screw (5) comprises a screw shaft (7) and two screw flights (8 and 9) disposed in the form of a double helix. The screw flight (9) is substantially continuous, but the screw flight (8) is provided with large interruptions (11) within which a plurality of additional flight pieces (13) are disposed to change the number of passages repeatedly. Mixing/kneading pins (15) protruding into the bore (4H) can be provided. Preferably, the paths (17) for the mixing/kneading pins (15) are positioned within the interruptions (11) and on the upstream side and downstream side of the additional flight pieces (13).

Abstract: The present invention provides a studless tire excellent in performance on ice and snow in which digging friction is improved without losing adhesion friction. The studless tire has a tread comprising specific short fiber or plate-like material dispersed in diene rubber so as to be oriented in the tread thickness direction, wherein when measured at 25° C. the tread has a complex elastic modulus E1 in the tread thickness direction, and the sheet has a complex elastic modulus E? in the extrusion direction and a complex elastic modulus E? in a 90° direction from the extrusion direction, when the rubber composition is made into 2 mm sheets with a roller and these moduli fulfill the following equation, 60?(E1?E?)/(E??E?)×100?100 and the tread has a specific tread rubber hardness.

Abstract: A screw extruder comprises an extruder body (4) with a bore (4H), and a screw (5) rotatably disposed in the bore (4H). The screw (5) comprises a screw shaft (7) and two screw flights (8 and 9) disposed in the form of a double helix. The screw flight (9) is substantially continuous, but the screw flight (8) is provided with large interruptions (11) within which a plurality of additional flight pieces (13) are disposed to change the number of passages repeatedly. Mixing/kneading pins (15) protruding into the bore (4H) can be provided. Preferably, the paths (17) for the mixing/kneading pins (15) are positioned within the interruptions (11) and on the upstream side and downstream side of the additional flight pieces (13).

Abstract: An apparatus for activating an ionizable product is provided, which includes means for generating a magnetic field and means for applying plasma particles by corona discharge to the ionizable product placed on the means for generating the magnetic field.

Abstract: Each mixing rotor for a batch mixer is rotatably insertable into a mixing chamber such that tip clearances are defined between tips of mixing blades and an inner surface of a mixing chamber and is provided on its outer circumferential surface with a plurality of mixing blades for imparting shearing forces to a material to be mixed by causing the material to pass through the tip clearances. The plurality of mixing blades include a nonlinear blade which is substantially nonlinear from a start point to a terminal point in a development of the mixing rotor developed into a plane about its longitudinal axis, and other linear blades which are linear in the development and whose helix angle to the longitudinal axis of the mixing rotor is set at 15 to 35°. An appropriate mixing control capable of realizing both sufficient mixing and sufficient dispersion can be executed by mixing and dispersing the material in a well-balanced manner by means of the mixing rotor.

Abstract: An apparatus for activating an ionizable product is provided, which includes means for generating a magnetic field and means for applying plasma particles by corona discharge to the ionizable product placed on the means for generating the magnetic field.

Abstract: The present invention provides a studless tire excellent in performance on ice and snow in which digging friction is improved without losing adhesion friction. The studless tire has a tread comprising specific short fiber or plate-like material dispersed in diene rubber so as to be oriented in the tread thickness direction, wherein when measured at 25° C.

Abstract: A corona discharge apparatus 2 is provided as an ionized gas irradiation means above a plate 3 on which a textile product 2 is placed. The ionized gas E generated by the corona discharge apparatus 4 is irradiated to the textile product 2 and the textile product is activated. The ionized gas E penetrates into the textile product 2 from surface to back under the influence of the magnetic field generated by the plate 3. The textile product 2 is fully ionized from surface to back by this method and apparatus.

Abstract: A corona discharge apparatus 2 is provided as an ionized gas irradiation means above a plate 3 on which a textile product 2 is placed. The ionized gas E generated by the corona discharge apparatus 4 is irradiated to the textile product 2 and the textile product is activated. The ionized gas E penetrates into the textile product 2 from surface to back under the influence of the magnetic field generated by the plate 3. The textile product 2 is fully ionized from surface to back by this method and apparatus.

Abstract: Each mixing rotor for a batch mixer is rotatably insertable into a mixing chamber such that tip clearances are defined between tips of mixing blades and an inner surface of a mixing chamber and is provided on its outer circumferential surface with a plurality of mixing blades for imparting shearing forces to a material to be mixed by causing the material to pass through the tip clearances. The plurality of mixing blades include a nonlinear blade which is substantially nonlinear from a start point to a terminal point in a development of the mixing rotor developed into a plane about its longitudinal axis, and other linear blades which are linear in the development and whose helix angle to the longitudinal axis of the mixing rotor is set at 15 to 35°. An appropriate mixing control capable of realizing both sufficient mixing and sufficient dispersion can be executed by mixing and dispersing the material in a well-balanced manner by means of the mixing rotor.

Abstract: A method of activating down and fiber materials uses a plurality of nozzles for ionized air and nozzles for normal air alternately at proper intervals in the passage of the materials to be treated. The materials are subjected to ionization by ionized air ejected from the nozzles for ionized air produced by an air ionizer connected to the ionized air nozzles. Then the materials are subjected to suspension of the progress of oxydization caused by ozone by normal air ejected from the normal air nozzles. This process is repeated several times while the materials are passing through the passage. The repeated processes of such alternate ionization and suspension of the progress of oxydization caused by ozone allow the materials to be gradually and intensively ionized, resulting in producing finally activated materials which are characteristic of restored bulkiness and elasticity. An enclosure can also be adopted instead of the passage.

Abstract: Disclosed is a process for cleaning feathers in a cyclone, wherein feathers are introduced into the interior of a tubular-shaped cyclone in a tangential direction thereof, so that a swirl motion of feathers can be generated in the cyclone together with the downward movement of feathers toward the bottom of the cyclone. A flow of ionized air from compressed air nozzles provided with high voltage electrodes is discharged onto the feathers in a direction transverse to that of the swirl motion. A turbulent flow is created in the cyclone, thereby permitting the feathers to be effectively opened. The impurities attached to the feathers are thus separated therefrom. Thereafter, purified feathers are exhausted out of the cyclone. Ozone generated by the corona discharge in the high voltage electrodes causes the feathers to be sterilized, deodorized and decolorized.