An extrusion device for producing an object having a cavity, in particular a tube or a container, includes a material feed that opens into an extrusion nozzle, and a support gas feed that opens into a blow-in opening for introducing support gas into the interior of the resulting object, wherein the support gas feed has at least one valve for regulating the support gas, characterized in that at least one valve for regulating the support gas is a proportional valve which can be regulated by a controller.

A shear-assisted extrusion process and related apparatus can include establishing shear-assisted extrusion to form a first extrudate, suspending such extrusion, and re-starting extrusion with the same material or initiating extrusion of a different material or different billet of the same material to form a second extrudate, without requiring disassembly of extrusion apparatus or clearing of an extrusion die tool. A resulting combined extrudate can include a fused region joining the first extrudate and the second extrudate. Such processing does not require (nor generally involve) melting of feedstock materials and can be performed even if cooling occurs of the die tool and associated billet material between suspension of extrusion and re-start or initiation of subsequent extrusion. In this manner, downtime can be reduced or minimized, or extrusions can be formed having different material properties along their axial extent, as illustrative examples.

The present invention relates to a process for producing transparent polymeric films or plastics moldings of particularly high chemical resistance, having more particularly a very good resistance towards oil-in-water and water-in-oil emulsions, and of high optical quality.

Polymer pellets are formed using air to influence the separation of polymer from a polymer melt. In accordance with one or more embodiments, a polymer material is extruded through a nozzle to form a polymer melt extending from the nozzle. A non-uniform thickness is generated in the polymer melt using a gas or gasses to apply a drag force to the polymer melt. This drag force reduces a thickness of a portion of the polymer melt adjacent the nozzle, and the polymer melt is fractured into discrete droplets at the reduced thickness. The discrete droplets are then solidified to form pellets.

Disclosed is a method for preparing a three-layer-co-extruded diaphragm of a lithium-ion battery, falling into lithium-ion battery diaphragm technical field. The annealing box used comprises: box body, motor and sealing over, with uniformly-arranged heating plates fixedly connected to inner surface of the box body, a driving shaft arranged horizontally within the box body in front-back direction, a first and second driven shafts arranged on the left and right sides of the driving shaft correspondingly within the box body, an interlayer film coiling connected between the driving shaft and the first driven shaft within the box body horizontally; a diaphragm coiling connected between the driving shaft and the second driven shaft within the box body slantwise. Controllable annealing temperature and insulation from external environment avoid influence of external environment on diaphragm and ensure uniform heating of diaphragm. It produces a diaphragm of stable quality and is convenient to be mass-produced.

The present invention provides an LCP extruded film comprising a thermoplastic liquid crystal polymer and having a thickness of 15 m or more and 300 m or less, wherein coefficients of linear thermal expansion in a MD direction and a TD direction at 23 to 200 C. as measured by a TMA method according to JIS K7197 are each within a range of 30 to 55 ppm/K, and the following conditions (A) and/or (B) are satisfied, and a method for manufacturing the same, an LCP extruded film for stretch treatment, an LCP stretched film, a heat-shrinkable LCP stretched film, an insulating material for a circuit substrate, and a metal foil-clad laminate: (A) a degree of orientation 1(%) of a film surface S1 exposed and a degree of orientation 2(%) of a film surface S2 located at a depth of 5 m from the film surface S1 satisfy a relationship of 4.0[(21)/1]1000.0; (B) a hardness H1 at a point of a depth of 1 m located at a position of 1 m from a film surface in a thickness direction and a hardness H2 at a thickness center point, as measured by subjecting a film cross section in parallel with a MD direction to a nanoindentation method, satisfy 10.0100(H2H1)/H10.0.

The present invention provides an LCP extruded film comprising a thermoplastic liquid crystal polymer and having a thickness of 15 m or more and 300 m or less, wherein coefficients of linear thermal expansion in a MD direction and a TD direction at 23 to 200 C. as measured by a TMA method according to JIS K7197 are each within a range of 30 to 55 ppm/K, and the following conditions (A) and/or (B) are satisfied, and a method for manufacturing the same, an LCP extruded film for stretch treatment, an LCP stretched film, a heat-shrinkable LCP stretched film, an insulating material for a circuit substrate, and a metal foil-clad laminate: (A) a degree of orientation 1 (%) of a film surface S1 exposed and a degree of orientation 2 (%) of a film surface S2 located at a depth of 5 m from the film surface S1 satisfy a relationship of 4.0[(21)/1]1000.0; (B) a hardness H1 at a point of a depth of 1 m located at a position of 1 m from a film surface in a thickness direction and a hardness H2 at a thickness center point, as measured by subjecting a film cross section in parallel with a MD direction to a nanoindentation method, satisfy 10.0100(H2H1)/H10.0.

The present invention provides an LCP extruded film comprising a thermoplastic liquid crystal polymer and having a thickness of 15 m or more and 300 m or less, wherein coefficients of linear thermal expansion in a MD direction and a TD direction at 23 to 200 C. as measured by a TMA method according to JIS K7197 are each within a range of 30 to 55 ppm/K, and the following conditions (A) and/or (B) are satisfied, and a method for manufacturing the same, an LCP extruded film for stretch treatment, an LCP stretched film, a heat-shrinkable LCP stretched film, an insulating material for a circuit substrate, and a metal foil-clad laminate: (A) a degree of orientation 1(%) of a film surface S1 exposed and a degree of orientation 2(%) of a film surface S2 located at a depth of 5 m from the film surface S1 satisfy a relationship of 4.0[(21)/1]1000.0; (B) a hardness H1 at a point of a depth of 1 m located at a position of 1 m from a film surface in a thickness direction and a hardness H2 at a thickness center point, as measured by subjecting a film cross section in parallel with a MD direction to a nanoindentation method, satisfy 10.0100(H2H1)/H10.0.