One method for creating barrier products (for example, condoms and gloves) includes: (a) dipping a former into a tank of elastic compound. The former has an indentation extending inwardly from an outer surface for creating a first protrusion on a first face of the barrier product. The method further includes: (b) removing the former from the tank of elastic compound, whereby some of the elastic compound removably adheres to the former and fills the indentation; (c) applying supplemental material to the elastic compound, whereby creating a second protrusion on a second face of the barrier product; and (d) fully drying the supplemental material. One barrier product includes an elastic wall having opposed faces, and first and second protrusions respectively extend from the opposed faces. The first and second protrusions are in cross-sectional alignment whereby rotational input forces on the first protrusion create rotational output forces on the second protrusion.

The present invention relates to a process for the production of a panel for floor or wad coverings comprising the steps of mixing and homogenising raw materials, thereby obtaining a dryblend, extruding said dryblend, thereby obtaining one or more thermoplastic layers, laminating the afore-mentioned thermoplastic layers, thereby obtaining a laminate, and profiling said laminate, thereby obtaining a panel for floor or wall coverings, wherein at least one thermoplastic layer is extruded by means of a co-rotating twin-screw extruder with pressure element.

A process for the extrusion of plastics, such as plastics that tend to adhere or stick to parts of an extruder, using a planetary roller extruder in the feed part.

A thermoplastic composite structure is produced by extruding a bead of composite material to a desired cross sectional shape. An extruder extrudes the polymer bead containing reinforcing fibers, using a low compression first extruder stage where the polymer is mixed and de-gassed, and a high compression second stage where the polymer is consolidated and extruded. The cross sectional profile of the polymer bead may be altered using a variable extruder gate.

A thermoplastic composite structure is produced by extruding a bead of composite material to a desired cross sectional shape. An extruder extrudes the polymer bead containing reinforcing fibers, using a low compression first extruder stage where the polymer is mixed and de-gassed, and a high compression second stage where the polymer is consolidated and extruded. The cross sectional profile of the polymer bead may be altered using a variable extruder gate.

A system for fabricating an object includes an extruder for one or more deposition materials having at least one nozzle and a movable support for the nozzle. The nozzle has a nozzle axis and is rotatably attached to the movable support via a connector that is actuatable relative to the movable support to change an angular orientation of the nozzle axis, thus varying an angle between the nozzle axis and a deposition surface. The system also includes a controller that can apply a correction factor calculated for a path of the nozzle when an acute angle is formed between the nozzle axis and the deposition surface, the correction factor for moving toward the acute angle being different from that when moving away from it. The correction factor removes differences in thickness of the deposited material caused by variations in the angle formed between the nozzle axis and the deposition surface.

Methods for producing transparent polycarbonate articles include melting a composition at a temperature of 300 to 390 C., extruding the melted composition to form a strand, cooling the strand of extruded composition, cutting the cooled strand into pellets, drying the pellets at a temperature of 50 to 140 C. and injecting molding or extruding the pellets at a temperature of 300 to 380 C. to form an article. The composition can comprise a moisture content of 0.1 to 5 wt. % and a crystalline additive having a melting point of at least 280 C., a heat of fusion greater than or equal to 1.0 Joule/gram (J/g). The composition can be cooled to at least 20 C. below the glass transition temperature of the polycarbonate.

An extruder arrangement and a method of feeding feed material into an extruder. The abstract of the disclosure is submitted herewith as required by 37 C.F.R. 1.72(b). As stated in 37 C.F.R. 1.72(b): A brief abstract of the technical disclosure in the specification must commence on a separate sheet, preferably following the claims, under the heading Abstract of the Disclosure. The purpose of the abstract is to enable the Patent and Trademark Office and the public generally to determine quickly from a cursory inspection the nature and gist of the technical disclosure. The abstract shall not be used for interpreting the scope of the claims. Therefore, any statements made relating to the abstract are not intended to limit the claims in any manner and should not be interpreted as limiting the claims in any manner.

One method for creating barrier products (for example, condoms and gloves) includes: (a) dipping a former into a tank of elastic compound. The former has an indentation extending inwardly from an outer surface for creating a first protrusion on a first face of the barrier product. The method further includes: (b) removing the former from the tank of elastic compound, whereby some of the elastic compound removably adheres to the former and fills the indentation; (c) applying supplemental material to the elastic compound, whereby creating a second protrusion on a second face of the barrier product; and (d) fully drying the supplemental material. One barrier product includes an elastic wall having opposed faces, and first and second protrusions respectively extend from the opposed faces. The first and second protrusions are in cross-sectional alignment whereby rotational input forces on the first protrusion create rotational output forces on the second protrusion.

A method and an apparatus for rapid and efficient heating of polymer pellets in preparation for processing in a plastifier. For introduction of heat energy, a gas, preferably dried air, is introduced into the polymer pellets flow so as not to be in direct countercurrent thereto. The gas is preferably introduced in its still hottest state in a targeted fashion, for the purpose of rapid energy input, at a freely selectable location. This preferably takes place at the material output of the booster hopper. The gas is preferably conducted by way of cascades, which can be of a variable design, and flows through the bulk material at least twice. The speed of the flow can be influenced.