The method of making a pellet comprising wood pulp fiber and thermoplastic polymer, comprising extruding an extrudate comprising 10 to 50 weight % wood pulp fiber and 45 to 85 weight % thermoplastic polymer through a die, cutting a pellet from the extrudate, removing the pellet from the extrudate with water having a temperature less than the extrudate, filtering the pellet from the water. In one embodiment the wood pulp fiber in the pellet has a moisture content of 1% or less. In one embodiment the wood fiber does not swell.

A method for continuous bulk polymerization is disclosed that includes providing a planetary roller extruder having a plurality of planetary roller zones, introducing an acrylate monomer, a di-vinyl monomer, and a hydroxyl functional acrylic monomer into the planetary roller extruder, introducing an initiator into the planetary roller extruder for initiation of a free-radical polymerization of the acrylate monomer, the di-vinyl monomer, and the hydroxyl functional acrylic monomer to form an acrylic polymer, maintaining the temperature of the free-radical polymerization in the planetary roller extruder below 240 C., and discharging a portion of the acrylic polymer from the planetary roller extruder, and returning the portion of the acrylic polymer to one or more of the plurality of planetary roller zones.

The invention describes a method for the manufacture of a plasticized polyvinyl alcohol polymer mixture including the steps of: introducing into a mixing reactor a polyvinyl alcohol polymer comprising homopolymeric polyvinyl alcohol or a blend thereof having a degree of hydrolysis in the range of 93% to less than 98% or more; where the plasticizer comprises two or more compounds selected from the group consisting of diglycerol, triglycerol, xylose, D-mannitol, triacetin, dipentaerythritol, 1,4-butanediol, 3,3-dimethyl-1,2-butanediol, and caprolactam; reacting the water, the plasticizer and the polyvinyl alcohol polymer in the reaction zone to form the plasticized polymer; and allowing the plasticized polyvinyl alcohol polymer to pass from the primary outlet.

A kneading apparatus includes a processor, and a extruder. The extruder includes a screw. The screw includes a screw main body. A conveyance portion, a barrier portion, and a path are provided at places of the screw main body. In at least one of the places, the path is provided inside the screw main body, and includes an entrance and an exit. The raw materials, pressure on which is increased by the barrier portion, flow in from the entrance. The raw materials flowing in from the entrance flow through the path toward the exit. The exit is positioned to be remote from the entrance in an axial direction.

According to one embodiment, an extruder screw includes a screw body. The screw body is rotated about an axis parallel to a direction of conveyance of a raw material. A conveyance portion having a flight is provided on the outer peripheral surface of the screw body. The flight is configured to convey the raw material along the axis of the screw body when the screw body is rotated. A passage for permitting the raw material fed by the flight to pass therethrough to the outer peripheral surface of the screw body is provided in the screw body in a position deviated from the axis of the screw body.

Multilayer product comprising at least one layer of an acrylate-based foam carrier (S); and a multiphase polymer composition (P) applied to this layer; the multiphase polymer composition (P) comprising: a comb copolymer (A) which is obtainable by polymerization of at least one (meth)acrylate monomer in the presence of at least one macromer selected from the group consisting of polymerizable ethylene-butylene, ethylene-propylene, ethylene-butylene-propylene and isobutylene macromers, and which forms a continuous acrylate phase and a discontinuous hydrocarbon phase Kw; and at least one hydrocarbon component (B) which is soluble in the hydrocarbon phase Kw of the comb copolymer (A) and comprises at least one plasticizer resin and at least one solid resin;
the multiphase polymer composition (P) having a continuous acrylate phase with a static glass transition temperature Tg(Ac), measured by the DSC method, and a discontinuous hydrocarbon phase Kw1, comprising the hydrocarbon component (B) and having a static glass transition temperature Tg(Kw1), measured by the DSC method, where Tg(Kw1) is higher than Tg(Ac) by 35 to 60 kelvins.

The invention describes a method for the manufacture of a plasticized polyvinyl alcohol polymer mixture including the steps of: introducing into a mixing reactor a polyvinyl alcohol polymer comprising homopolymeric polyvinyl alcohol or a blend thereof having a degree of hydrolysis in the range of 93% or greater more; where the plasticizer comprises two or more compounds selected from the group consisting of diglycerol, triglycerol, xylose, D-mannitol, triacetin, dipentaerythritol, 1,4-butanediol, 3,3-dimethyl-1,2-butanediol, and caprolactam; reacting the water, the plasticizer and the polyvinyl alcohol polymer in the reaction zone to form the plasticized polymer; and allowing the plasticized polyvinyl alcohol polymer to pass from the primary outlet.

The invention relates to a mixing and kneading machine for continuous preparation processes, such as for producing granules, extruded profiles, or molded articles, such as polymer granules, polymer extruded profiles, or polymer molded parts, having a feeding and mixing device (12) and a discharge device (14), wherein the feeding and mixing device includes a housing (18), a screw shaft (34), and a connecting element (24), wherein the connecting element is arranged at a front side of the housing and is also connected to the discharge device, wherein a hollow interior is formed in both the housing and the connecting element, and the screw shaft extends, at least sectionally, in the axial direction through the interior of the housing and, at least sectionally, in the axial direction through the interior of the connecting element, and wherein a plurality of kneading elements (40), which extend from the inner circumferential surface of the housing into the interior, are provided in the housing, and wherein kneading elements (40) are also arranged on the inner circumferential surface of the connecting element and extend into the interior of the connecting element, and the discharge device has a degassing device (26).

Method for producing rubbery material ready for crosslinking, comprising a continuous extrusion of crosslinked rubber, in grains and/or chips, comprising i) decrosslinking by mechanical shearing of said grains and/or chips and increasing the temperature until a decrosslinked paste is formed, ii) cooling said decrosslinked paste with the optional addition of at least one additive, and iii) mixing the cooled decrosslinked paste with at least one crosslinking agent, and collecting, at the end of this continuous extrusion, a pasty mixture forming said rubbery material ready for crosslinking.

A mixing and kneading machine for continuous preparation processes, such as for producing granules, extruded profiles, or molded articles, such as polymer granules, polymer extruded profiles, or polymer molded parts, having a feeding and mixing device (12) and a discharge device (14), wherein the feeding and mixing device includes a housing (18), a screw shaft (34), and a connecting element (24), wherein the connecting element is arranged at a front side of the housing and is also connected to the discharge device, wherein a hollow interior is formed in both the housing and the connecting element, and the screw shaft extends, at least sectionally, in the axial direction through the interior of the housing and, at least sectionally, in the axial direction through the interior of the connecting element, and wherein a plurality of kneading elements (40), which extend from the inner circumferential surface of the housing into the interior, are provided in the housing, and wherein kneading elements (40) are also arranged on the inner circumferential surface of the connecting element and extend into the interior of the connecting element, and the discharge device has a degassing device (26).