The instant disclosure provides a die assembly for producing an annular microcapillary product. The die assembly is operatively connectable to an extruder having a thermoplastic material passing therethrough. The die assembly includes a shell, an inner manifold, an outer manifold, and a die assembly. The inner and outer manifolds are positionable in the shell with matrix flow channels thereabout to receive the thermoplastic material therethrough such that matrix layers of the thermoplastic material are extrudable therefrom. The die insert is disposable between the inner and the outer manifolds, and has a distribution manifold with a tip at an end thereof defining microcapillary channels to pass a microcapillary material therethrough whereby microcapillaries are formed between the matrix layers.

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.

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 process for forming a film for dynamically vulcanized alloy comprising at least one elastomer dispersed within a thermoplastic resin domain wherein the film is characterized by low shrinkage rates after completion of the formation of the extruded film. The film has a shrinkage rate, measured at not earlier than 96 hours after formation of the film, of less than 1.5% relative to the film width as measured just after film formation. During formation of the film, the extruded film is subjected to a cooling rate of less than 97 C. per second and the frost line of the extruded film is greater than 135 mm.

A bioabsorbable scaffold composed of a multilayer structure of alternating layers of different polymers is disclosed. The multilayer structure can have 20 to 1000 layers and the individual thickness of the layers can be 0.2 to 5 microns. A method of making the scaffold including a layer multiplying extrusion process is disclosed.

A laminated resin tube includes an inner layer containing a thermoplastic material which is a thermoplastic resin or a thermoplastic elastomer, an intermediate layer provided on the outer periphery of the inner layer and containing a polyamide, and an outer layer provided on the outer periphery of the intermediate layer and containing a fluoropolymer.

A system and method are presented in which a flow of plastic is extruded to obtain nano-sized features by forming multiple laminated flow streams, flowing in parallel through the non-rotating extrusion system. Each of the parallel laminated flow streams are subjected to repeated steps in which the flows are compressed, divided, and overlapped to amplify the number of laminations. The parallel amplified laminated flows are rejoined to form a combined laminated output with nano-sized features. The die exit is formed to provide a tubular shape.

An extrusion head arrangement has a plurality of extrusion heads arranged next to one another along a transverse axis. Each extrusion head has a housing with at least one flow channel for forming a strand of extrudable plastic in the direction of a longitudinal axis. The housing has an outer housing part extending along the longitudinal axis with an outer circumferential surface. A longitudinal bore parallel to the longitudinal axis is arranged in the outer housing part. The outer circumferential surface of the outer housing part has an oval cross-section with a largest diameter and a smallest diameter. The extrusion heads are arranged next to each other with the smallest diameters parallel to the transverse axis. The longitudinal bores are each arranged on a diameter deviating from the smallest diameter.

An extrusion head arrangement has a plurality of extrusion heads arranged next to one another along a transverse axis. Each extrusion head has a housing with at least one flow channel for forming a strand of extrudable plastic in the direction of a longitudinal axis. The housing has an outer housing part extending along the longitudinal axis with an outer circumferential surface. A longitudinal bore parallel to the longitudinal axis is arranged in the outer housing part. The outer circumferential surface of the outer housing part has an oval cross-section with a largest diameter and a smallest diameter. The extrusion heads are arranged next to each other with the smallest diameters parallel to the transverse axis. The longitudinal bores are each arranged on a diameter deviating from the smallest diameter.

Provided is a mold capable of shortening the length of a part mixed with resin before and after switching when switching the resin to be extruded onto the surface of a braided wire, and a flexible tube producing apparatus using the same. The mold for extruding the flexible tube includes a linear through hole through which a braided wire inserted from one end is drawn out from the other end, a first resin supply path connected to the through hole and having a flow path parallel to a plane orthogonal to the central axis of the through hole, and a second resin supply path connected to the through hole on the one end side of the through hole relative to the connection point between the first resin supply path and the through hole, and having a flow path parallel to the plane.