The present disclosure generally relates to extrusion die systems. In particular, the present disclosure relates to the cyclical extrusion of materials to generate small sized grain features, generally in the range of nanosized grain features, in a tubular or profile shape, in which the individual nanolayers possess pores and/or polymer crystals oriented parallel to the extrusion flow direction and including products with enhanced permeation properties.

A method for depositing a structure comprising interdigitated materials includes merging flows of at least two materials in a first direction into a first combined flow, dividing the first combined flow in a second direction to produce at least two separate flows, wherein the second direction is perpendicular to the first direction, and merging the two separate flows into a second combined flow.

An extrusion die includes a die body with two mating die halves, at least one of which is engraved with a die cavity system. The die cavity system includes a melt inlet, a first-stage melt reservoir in fluid communication with the melt inlet, a plurality of melt channels extending from the first-stage melt reservoir, and an extrusion trough in fluid communication with the melt channels and extending across the die half. Multiple stages of reservoirs and channels may be used. The melt channels in each stage have an equal length and cross-sectional area. Some of the melt channels may have a curved portion to maintain an equal length with other melt channels in the same stage. The die halves are secured by a plurality of fasteners. A method for extruding a fluid using the die is also provided. The die may be used to create films or fibers, including nano-fibers.

A film having first segments and second segments arranged across the film's width direction is disclosed. The first and second segments are separated from each other by polymer interfaces. The first segments include a first polymeric composition and the second segments include a second polymeric composition. At least some of the second segments are layered second segments having first and second layers in the film's thickness direction, and one of the first or second layers includes a third polymeric composition different from the second polymeric composition. An extrusion die useful for making the film and a method for making the film using the extrusion die are also disclosed.

The present invention relates to: a method for manufacturing a polymer film, the method including a base film forming step for co-extruding a first resin containing a polyamide-based resin and a second resin containing a copolymer including polyamide-based segments and polyether-based segments; a co-extruded film including a base film including a first resin layer containing a polyamide-based resin, and a second resin layer containing a copolymer having polyamide-based segments and polyether-based segments; to a co-extruded film including a base film including a first resin layer and a second resin layer, which have different melting points; and to a method for manufacturing a polymer film, the method including a base film forming step including a step of co-extruding a first resin and a second resin, which have different melting points.

A molding member shape control device includes: a flowable molding material flow passage; a flow resistance member advancing into and withdrawing from the flowable molding material flow passage; a sensor measuring a speed of a molding member formed by extruding a molding material from the flowable molding material flow passage; and a control unit advancing and withdrawing the flow resistance member on the basis of a difference between a speed of the molding member measured by the sensor and a target speed of the molding member at a position of the sensor.

Provided is a mouthpiece for an extruder provided at an extruder extruding a flowable molding material, including: a molding material flow passage; a molding material extrusion port formed at a front end of the molding material flow passage; and one or plural flow resistance members provided to advance into and withdraw from the molding material flow passage, the advancing and the withdrawing being performed by an operation at the outside of the mouthpiece for the extruder.

A feedblock including a first packet creator that forms a first packet including a first plurality of polymeric layers, the first plurality of layers including at least four first individual polymeric layers; and a second packet creator that forms a second packet including a second plurality of polymeric layers, the second plurality of layers including at least four second individual polymeric layers, wherein the first and second packet creators are configured such that, for each packet creator, respective individual polymeric layers of the plurality of polymeric layers are formed at approximately the same time. The feedblock may include a packet combiner that receives and combines the first and second primary packets to form a multilayer stream. In some examples, at least one of the first and second primary packets may be spread in the cross-web direction prior to being combined with one another.

The present disclosure generally relates to extrusion die systems. In particular, the present disclosure relates to the cyclical extrusion of materials to generate small sized grain features, generally in the range of nanosized grain features, in a tubular or profile shape, in which the individual nanolayers possess pores and/or polymer crystals oriented parallel to the extrusion flow direction and including products with enhanced permeation properties.

An improved, high-capacity die assembly (10) for a food or feed extruder (12) is provided and is particularly useful for the production of high quality aquatic feeds. The die assembly (10) includes a mount (20), which is secured to the discharge end of an extruder barrel (14), with a plurality of tubular die components (22, 24) coupled with the mount (20). Each component (22,24) includes wall structure (38) defining an outwardly diverging tubular chamber (40) with a die plate assembly (50) coupled to the outer end of the wall structure (38). A flow diverter element (54) is located within each chamber (40) and has a large diameter end adjacent the assembly (50) and a smaller diameter end closer to the chamber inlet. The assembly (50) has a plurality of openings (52) outboard of the element (54).