A method of cleaning an extrusion die from residual metal remaining after an extrusion process at a temperature below 600° C. and of recovering the residual metal includes providing a thrust member with at least one portion made of a polymeric material at the extrusion die; reciprocally moving the thrust member and the die; removing polymeric material not flowed out of the die during the preceding step; mechanically and/or chemically removing the residual metal not flowed out from the die during the moving step; and opening the extrusion die. The polymeric material in the moving step has a water content lower than 7% by weight with respect to the total weight of the polymeric material. During the moving step, the polymeric material is at least partially in a plastic deformation condition or melted so as to occupy the volume of the residual metal flowed out of the extrusion die.

An encapsulant compound apparatus, includes a mechanical operator, and an insert disposed on a surface of the mechanical operator. The insert operates to capture foreign material in the encapsulant compound.

A method and device for producing a monoaxially or biaxially stretched plastic film are disclosed in which in the intermediate space (Z) tapering in a wedge shape to the contact line between the melt film or plastic film and the roller jacket spaced apart therefrom or the roller surface spaced apart therefrom of the cooling roller, at least one device for preventing precipitation of condensate (K) in the intermediate space (Z) is used and is designed such that precipitation of condensate (a) on the underside of the melt film or plastic film facing the roller jacket (9) or on the roller jacket of the cooling roller is prevented, and/or a condensate (K) which has precipitated there evaporates or vaporises, and/or condensate disposed in the intermediate space is transported away, suctioned off, or blown out and/or runs out to the side.

According to an embodiment, an electrospinning head includes a nozzle and an uneven surface. The nozzle is made from an electrically conductive material, and a flow path is formed inside the nozzle. On the outer surface of the nozzle, an ejection port capable of ejecting a material liquid supplied to the flow path is formed. The uneven surface is formed in the vicinity of the projection port on the outer surface of the nozzle, and an uneven shape of the uneven surface is formed around the entire circumference of the circumferential direction of the nozzle and is along the extending direction of the flow path.

A purging compound for removing a processing residue comprising a resin (C) to be purged, from a resin processing machine, comprising: a thermoplastic resin (A) and a non-ionic additive (B) of the following Formula (I) having a melting or softening point of lower than 150° C.:

Rn—X   (I)

(where R is a hydrophobic organic group, n is an integer of 1 or more, and X is a polar group), wherein a MFR (280° C. and a load of 2.16 kg) is 30 g/10 min or less, the difference of the solubility parameter between the resin (A) and the resin (C) is +1.6 to −1.6 (cal/cm.sup.3).sup.1/2, the difference of the solubility parameter between the additive (B) and the resin (C) is +1.6 to −1.6 (cal/cm.sup.3).sup.1/2, and the difference of the solubility parameter between the additive (B) and the hydrophobic organic group R is 0.7 (cal/cm.sup.3).sup.1/2 or more.

A purging compound for removing a processing residue comprising a resin (C) to be purged, from a resin processing machine, comprising: a thermoplastic resin (A) and a non-ionic additive (B) of the following Formula (I) having a melting or softening point of lower than 150° C.:

Rn—X   (I)

(where R is a hydrophobic organic group, n is an integer of 1 or more, and X is a polar group), wherein a MFR (280° C. and a load of 2.16 kg) is 30 g/10 min or less, the difference of the solubility parameter between the resin (A) and the resin (C) is +1.6 to −1.6 (cal/cm.sup.3).sup.1/2, the difference of the solubility parameter between the additive (B) and the resin (C) is +1.6 to −1.6 (cal/cm.sup.3).sup.1/2, and the difference of the solubility parameter between the additive (B) and the hydrophobic organic group R is 0.7 (cal/cm.sup.3).sup.1/2 or more.

An improved method and an improved device for producing a monoaxially or biaxially stretched plastic film are distinguished, inter alia, by the following features: In the intermediate space (Z) tapering in a wedge shape to the contact line (111, 11′) between the melt film or plastic film (5, 5′) and the roller jacket (9) spaced apart therefrom or the roller surface (9′) spaced apart therefrom of the cooling roller (1, 1′), at least one device for preventing precipitation of condensate (K) in the intermediate space (Z) is used and is designed such that precipitation of condensate (a) on the underside (5a) of the melt film or plastic film (5, 5′) facing the roller jacket (9) or on the roller jacket (9) of the cooling roller (1, 1′) is prevented, and/or a condensate (K) which has precipitated there evaporates or vaporises, and/or condensate disposed in the intermediate space (Z) is transported away, suctioned off, or blown out and/or runs out to the side.

An air ring has a main body including a plenum through which pressurized air enters the air ring, the main body including a generally circular interior that is unobstructed vertically above the main body. A generally circular forming-cone assembly is received in the generally circular interior of the main body, and includes at least one annular lip defining a passage through which pressurized air from the plenum exits the air ring for impingement upon the polymer tube. A plurality of fasteners secure the forming-cone assembly in the interior of the main body, the fasteners and forming-cone assembly being unobstructed vertically above the air ring, wherein the fasteners are accessible from vertically above the air ring and the forming-cone assembly is removable from the main body by vertical lifting without removal of other components from the air ring.

An air ring has a main body including a plenum through which pressurized air enters the air ring, the main body including a generally circular interior that is unobstructed vertically above the main body. A generally circular forming-cone assembly is received in the generally circular interior of the main body, and includes at least one annular lip defining a passage through which pressurized air from the plenum exits the air ring for impingement upon the polymer tube. A plurality of fasteners secure the forming-cone assembly in the interior of the main body, the fasteners and forming-cone assembly being unobstructed vertically above the air ring, wherein the fasteners are accessible from vertically above the air ring and the forming-cone assembly is removable from the main body by vertical lifting without removal of other components from the air ring.

A device for producing a dyed plastic melt and an undyed plastic melt includes a multi-shaft screw extruder, a first metering installation, a second metering installation, and a control installation for selecting between a first operating mode for producing the dyed plastic melt and a second operating mode for producing the undyed plastic melt. The first metering installation serves for feeding an undyed plastic material through a first infeed opening into a housing of the multi-shaft screw extruder, and the second metering installation serves for feeding at least one color granulate through a second infeed opening into the housing. The plastic material is fed exclusively by way of the first infeed opening such that residual color granulate or dyeing agent contained therein, respectively, which is still located in the second metering installation or in the region of the second infeed opening does not contaminate the undyed plastic melt.