A film-making machine that produces stretch film includes an outlet device with an outlet gap for outlet of free-flowing film material and a rotatably mounted casting roll that receives the released free-flowing film material on a surface of the casting roll, and a cleaning device with a rotatably mounted cleaning roll that contacts the film material lying on the surface of the casting roll, wherein the cleaning device has an adjusting mechanism with a circumferential adjustment that adjusts a cleaning position of the cleaning roll along a circumferential direction of the casting roll.

Provided is a method of making a sterilized flat plastic bag including the steps of: forming a roll of a tubular polymeric film in a blown film extrusion process, providing the roll of tubular polymeric film to a bag making process, and forming a sterilized flat plastic bag, wherein the tubular film is not slit in the longitudinal direction during any step of the method, and therefore avoids the necessity of a separate sterilizing step. Also provided is a sterilized flat plastic bag made according to the foregoing method of making and a method of using such a sterilized flat plastic bag to collect and retain a product sample and eliminate product contamination. The sterilized plastic bag made according to the above method provides improved tear strength and resistance to rupture when containing product.

A suction device for drying at least one plastic strand, incorporates a suction housing having a top side, a bottom side and several lateral surfaces, the top side having an inlet opening and one of the other surfaces having an outlet opening for the flow of a drying medium therethrough, and a screening element which has through apertures a base area with a maximum length and a maximum width. Each through aperture has an aperture cross-sectional area, and the sum of the aperture cross-sectional areas of all through apertures together forms a total aperture cross-sectional area. The screening element is on the top side and has its drying area above the inlet opening of the suction housing. The at least one plastic strand is moved in a process direction on the screening element, wherein the process direction is in a longitudinal direction of the screening element. The length of the drying area is at least 150 mm, and a ratio of the total aperture cross-sectional area of the through apertures to the base area of the drying area is between 30% and 45%, in particular 35% and 40%.

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.

A method of making an enhanced membrane suitable for use in single-ply roofing applications is disclosed. The method comprises mixing a masterbatch comprising an EPDM rubber and combining the masterbatch with a curing package to form a final batch. An adhesion promoter is incorporated in either the masterbatch or the final batch. The method further includes forming a sheet from the final batch and vulcanizing the sheet.

A method of producing a film in accordance with an aspect of the present invention includes: a first kneading and forming step of forming a composition obtained by kneading a polyolefin resin and a plasticizer; a stretching step of stretching the composition; a composition cleaning step of immersing the composition in a cleaning solvent and removing the plasticizer; a separation step of separating, from the cleaning solvent which has been used in the cleaning step, the plasticizer which has been eluted in the cleaning solvent; and a second kneading and forming step of forming a composition obtained by kneading a polyolefin resin and the plasticizer which has been separated in the separation step.

A gas dispensing canopy positionable over open parisons in a Blow/Fill/Seal machine prior to container forming, filling and sealing minimizes likelihood of particulate contamination of open parisons while the open parisons are transported to a container forming, filling and sealing station.

A device may generate a multi-layer stack of sheets that may be adhered into a slab-shaped preform for thermal drawing. The sheets may include sublayers. Stacking the sub-layered sheets results in accumulation of layers in the final fabricated preform. The stacking process may use mechanical translation and conveyance to support placement of the sheets and fabrication of the stack.

A device may generate a multi-layer stack of sheets that may be adhered into a slab-shaped preform for thermal drawing. The sheets may include sublayers. Stacking the sub-layered sheets results in accumulation of layers in the final fabricated preform. The stacking process may use mechanical translation and conveyance to support placement of the sheets and fabrication of the stack.

A method for manufacturing a preform assembly may included extruding a film through an extrusion die and translating a preform assembly so that a current layer for the preform is stacked on top of a previous lawyer of the preform. The extrusion die may have various features such as multiple inputs with a single stream output. A roller and a cutter may also be used as part of the layer stacking. The method may also take place in a enclosure with environment or temperature controls.