A process for the production of expanded material based on sulfone polymers includes an extrusion step in an extruder of virgin sulfone polymer with the injection of at least one expanding agent and in the presence of at least one nucleating agent, and a recycling step of part of the expanded material, which provides a recycled product used as raw material fed to the extruder in combination with the virgin sulfone polymer.

Open cell foam compositions are provided including a thermoplastic polymeric matrix and at least one filler. In some embodiments of the foam compositions, the filler includes nepheline syenite. Methods of making the foam compositions are described, the methods including (a) obtaining a composite materials containing a first thermoplastic polymer having a filler component and a blowing agent distributed therein; (b) coextruding the composite material with a second thermoplastic polymer and a third thermoplastic polymer to form a three-layer composition, wherein the three-layer composition includes a middle layer comprising an open cell foam formed from the foam composition, and the middle layer is disposed between the first and the second outer layers formed from the second and the third thermoplastic polymers, respectively; and (c) separating the middle layer from each of the first and the second outer layer. The first thermoplastic polymer is different from the second and the third thermoplastic polymers.

The present invention provides a process for producing a blow-molded foam including foamed cells, the process including: kneading a polyolefin-based resin containing a foaming agent mixed therewith in an extruder, and extruding a parison formed of the polyolefin-based resin between split mold blocks from a die slit at an extrusion rate of 700 kg/h or more.

The present invention relates to molded foam having no hollow space caused in a plate-shaped portion. The molded foam comprises a tube body and a plate-shaped portion joined to the outer side of the tube body. The expansion ratio of the molded foam is lower than two, and a value of a thickness B/a thickness A as a relationship between the thickness A of the tube body at the periphery of a point joined to the plate-shaped portion and the thickness B of the plate-shaped portion is less than 2.82.

The present disclosure is directed to a physically crosslinked, closed cell continuous multilayer foam structure comprising at least one foam polypropylene/polyethylene layer with a TPU cap layer. The multilayer foam structure can be obtained by coextruding a multilayer structure comprising at least one foam composition layer with at least one cap composition layer, irradiating the coextruded structure with ionizing radiation, and continuously foaming the irradiated structure.

A tubular molded body that can reduce restrictions on attachment to another member to be easily attached to another member. The tubular molded body 10 includes a tube main body 11 formed in a tubular shape and an attachment flange 100 formed in a flange shape to project from the tube main body 11. The attachment flange 100 includes a thin-walled hinge 130 and is rotatable by the hinge.

The present invention relates to molded foam having no hollow space caused in a plate-shaped portion. The molded foam comprises a tube body and a plate-shaped portion joined to the outer side of the tube body. The expansion ratio of the molded foam is lower than two, and a value of a thickness B/a thickness A as a relationship between the thickness A of the tube body at the periphery of a point joined to the plate-shaped portion and the thickness B of the plate-shaped portion is less than 2.82.

Various embodiments of the teachings herein include an electrical insulation system for an electric motor comprising a conductor with wire winding in a slot of a laminated core of a stator. The wire winding is embedded in an encapsulation. The encapsulation includes volume-increasing particles.

A process for the production of expanded material based on sulfone polymers includes an extrusion step in an extruder of virgin sulfone polymer with the injection of at least one expanding agent and in the presence of at least one nucleating agent, and a recycling step of part of the expanded material, which provides a recycled product used as raw material fed to the extruder in combination with the virgin sulfone polymer.

A seal for a vacuum lifter and method of manufacture wherein the seal has a continuous unbroken outer fluid resistant skin of elastomer which forms a boundary around a homogeneous cellular structure with no interior seams or joints.