An object of the present invention is to provide a method for producing water absorbent resin powder in which permeability potential (SFC) is improved while a water absorbing rate (FSR) is being kept. The method is a method for producing water absorbent polyacrylic acid (salt) resin powder including the steps of: (i) polymerizing an acrylic acid (salt) monomer aqueous solution; (ii) during or after the step of (i), performing gel grinding of a hydrogel crosslinked polymer obtained by the polymerization, wherein the hydrogel crosslinked polymer has resin solid content of 10 wt % to 80 wt %, and the gel grinding is carried out with gel grinding energy (GGE) of 18 [J/g] to 60 [J/g]; (iii) drying a particulate hydrogel crosslinked polymer obtained by the gel grinding, wherein the drying is performed at 150 C. to 250 C.; and (iv) carrying out a surface treatment to the particulate hydrogel crosslinked polymer thus dried.

Provided is a water absorbent resin that is useful to sanitary materials such as a disposable diaper, a sanitary napkin, and a blood absorbent for medical use each having a higher liquid permeability and a higher water absorbing speed. Further provided is a water absorbent resin powder that is useful to sanitary materials such as a disposable diaper, a sanitary napkin, and a blood absorbent for medical use each having increased in absorbency of a liquid and in heat retaining property. A gel grinding device to be used to produce a water absorbent resin, includes: a screw; a feed opening; an extrusion opening; a porous plate; and a barrel, the barrel including a return preventing member provided on an inner surface thereof, and the return preventing member satisfying at least one of specific parameters.

Provided is a water absorbent resin that is useful to sanitary materials such as a disposable diaper, a sanitary napkin, and a blood absorbent for medical use each having a higher liquid permeability and a higher water absorbing speed. Further provided is a water absorbent resin powder that is useful to sanitary materials such as a disposable diaper, a sanitary napkin, and a blood absorbent for medical use each having increased in absorbency of a liquid and in heat retaining property. A gel grinding device to be used to produce a water absorbent resin, includes: a screw; a feed opening; an extrusion opening; a porous plate; and a barrel, the barrel including a return preventing member provided on an inner surface thereof, and the return preventing member satisfying at least one of specific parameters.

There is disclosed a member for sealing, baffling and/or reinforcing components of an automotive vehicle. The assembly generally includes a carrier, an expandable material and at least one fastener.

Device and method for dispersing solids, liquids and gases in an extruder, having at least one shaft (1) and one housing (2), wherein at least one disk (4) with recesses is attached to the shaft, which at least one disk co-rotates with the shaft, and a non-co-rotating disk (3) is arranged immediately adjacent to the disk either in a product flow direction or counter to the product flow direction, which non-co-rotating disk likewise has recesses, and wherein the co-rotating disk is connected to the rotating shaft and has a gap (14) with respect to the housing, and the non-co-rotating disk is connected to the housing and has a gap (15) with respect to the rotating core shaft.

A vertical household noodle maker includes a base, a stirring container connected to the base, a stirring rod longitudinally arranged in the stirring container, an extrusion cylinder horizontally arranged at one side below the stirring container, a spiral rod arranged in the extrusion cylinder, an extrusion die and a control unit. The stirring rod includes a rod body and a stirring blade. The motor rotates the stirring rod and the spiral rod, and a feeding inlet in communication with the extrusion cylinder is provided at a bottom of the stirring container. An inner wall of the stirring container is provided with a cutting rod, and a projection of the cutting rod at least partially overlaps with a projection of the stirring blade in the horizontal direction when the stirring blade is driven by the motor to rotate to a position of the cutting rod.

A worm shaft for a mixing and kneading machine particularly for continual processing having a shaft bar, on the circumferential surface of which blade elements are arranged to be spaced apart from one another extending outwards from the circumferential surface of the shaft bar, wherein the blade elements are arranged on the circumferential surface of the shaft bar, at least in one section extending in the axial direction of the worm shaft, in two rows extending in the axial direction of the worm shaft, and wherein each of the blade elements of the at least one section extending in the axial direction of the worm shaft has an elliptic, oval, or biconvex outer peripheral surface in the top view.

A mixing section for an extrusion screw comprises a shaft having at least one set of spaced-apart cuspidate shaft teeth, with the shaft teeth extending radially outwardly from a root of the shaft. Each of the shaft teeth comprises a flank face and a rake face opposite the flank face, with the tooth transitioning between the flank face and the rake face at an outermost cusp. Some embodiments have one or more longitudinally extending, longitudinally spaced series of annular sets of circumferentially spaced shaft teeth. Some embodiments have one or more helically extending series of spaced-apart cuspidate shaft teeth. The mixing section may be received in a mixing section barrel to form a mixing portion of a screw extruder.

In an embodiment, the present invention provides a pin extruder, including a screw conveyor for conveying plastics, the screw conveyor having a plurality of pins each arranged in a respective pin row, the pin rows being arranged in a plurality of consecutive planes in a conveying direction of the screw conveyor. A distance between the planes of at least individual pin rows varies in the conveying direction.

A twin-screw extrusion kneader includes: two rotating shafts provided side by side in an internal space; a rotational driving portion configured to rotationally drive the rotating shafts; and paddles provided in the rotating shafts and configured to rotate along with the rotating shafts so as to knead a kneading material. Further, the twin-screw extrusion kneader includes movable portions provided as members constituting a part of the housing, the part of the housing including an inner wall surface of the housing, the inner wall surface being opposed to radially outer peripheral surfaces of the paddles. The movable portions can be moved in a direction to approach the paddles and in a direction to be distanced from the paddles.