An air ring comprises a circular plenum in fluid communication with a source of pressurized air. An upper and lower annular lips are in fluid communication with the plenum through upper and lower channels and are arranged to supply air to the blown film bubble. A plurality of vanes are disposed in the upper channel and extend radially inwardly from the plenum to the upper annular lip. The vanes divide the upper channel into a plurality of radially extending channel segments. Each vane has a selected length and a distal end proximal the upper annular lip, the distal end being spaced from the upper annular lip no greater than about 20% of the length of the vanes. A powered plunger extends between the vanes of each of the channel segments to vary the cross-sectional area of the channel segments.

A forming shoulder for forming a film tube from a flat film web and a method for producing a forming shoulder. The forming shoulder comprises a shoulder piece and a prism piece which are connected to each other along a forming edge, the shoulder piece having an outer shoulder surface via which the film web can be guided to an entry opening of the prism piece limited by the forming edge, the forming edge being made of at least one metal piece, a plastic shoulder piece and/or a plastic prism piece being molded onto the metal piece.

Provided are a heat-shrinkable label and a package each having solvent bonded-portion where solvent penetration-through is not caused even when the film is thin. Provided are particularly a heat-shrinkable label and a package each having solvent bonded-portion gaining a high peel strength stability even when the film is passed through a tubing step made high in speed. A heat-shrinkable label has a tubular shape, in which both end portions of a heat-shrinkable polyvinyl chloride-based film or a heat-shrinkable polystyrene-based film are bonded to each other with a solvent composition. The solvent composition contains at least one organic solvent selected from the group consisting of tetrahydrofuran (THE), methyl ethyl ketone (MEK) and ethyl acetate, and at least one resin selected from the group consisting of polyester, polypropylene and hydrogenated petroleum resin, and the end portion bonded has a peel strength of 2 N/15 mm or more.

A heat curable, circular knitted fabric includes reinforcing and meltable resin fibers that can be cured to form a more rigid material form. In one embodiment, the fabric includes a core spun yarn, wherein the core may be made from glass, carbon, basalt, aramid or metal. The wrap surrounding the core may include resin type fibers such as Poly(p-phenylene sulfide) PPS, Polyetherimide (PEI), Polyether ether ketone (PEEK), Polysulfone (PES), Polyphthalamide (PPA), nylon, polyester, or polypropylene.

The Continuous Sealing Machine for two plastic films performs continuous sealing of two films, a tubular with gussets and a plastic film, folds the gussets of the new compartment and as a result two compartment rolls are obtained, both compartments with gussets. This high performance machine provides the means for a modernization of the plastics industry. It is a machine on a main structure consisting of: Unwinders Outriggers Edge aligners Pulling roller systems Antistatic bars Antistatic bars Special device Motors with gearbox coupled to gearbox Automatic brakes Electromagnetic clutches continuous sealers Bellows former Camshaft sealers Front puller roll pitch motor Winding rods, foil positioning systems. It is part of the plastic industry machines together with extruders, printers, sealers, trimmers, raw material mixers and stencil assembly machines.

An oyster paper and a manufacturing method thereof are provided. The oyster paper is made of 60%-70% oyster shell powder, 10%-20% polymer, 15%-17% natural biodegradation inducing agent, and 3%-5% natural biodegradation assisting additive agent, by volume ratio, which are subjected to mixing and pre-melting processing, followed by compounding and pelletizing to prepare oyster paper pellets, which are then subjected to film blowing processing to be film-blown into an oyster paper product having a thickness of 0.05-0.5 millimeters. The oyster paper possesses the quality of wood pulp paper and shows bettered stiffness and wider applications. The oyster paper also provides, after being disposed and buried, an effect of being 100% natural degradation into compost for fertilizing the soil. As such, a kind of oyster paper featuring recycling and reuse of oceanic creature waste shell and natural microorganism induced degradation for composting and recycling and a manufacturing method thereof are provided.

A multilayer foam film comprising high density polyethylene for direct and non-direct food contact and aseptic packaging application is disclosed. In an embodiment, the film has a bulk density of less than 0.962 gr/cm.sup.3 wherein more than 50% of the cells in the foam layer are closed cells. In an embodiment, the foam films are thick (generally more than 8 mils thick) and have a bending stiffness value of more than 18, in Taber stiffness unit configuration according to TAPPI/ANSI T 489 om-15, and the ratio of the mass per unit area (the mass of a unit area of the film in gram per meter-squared (gr/m.sup.2)) over the stiffness value in Taber unit configuration is equal to or less than 13. In an embodiment, the film has a very smooth surface with a smoothness value of less than 25 in Sheffiled smoothness unit configuration according to TAPPI T 538. The described foam film can have a water vapor transmission rate value of less than 1 gr/m.sup.2/24 hr, according to ASTM E398-13. The described foam film can have an oxygen transmission rate value of less than 10 cc/m.sup.2/24 hr, according to ASTM D3985.

The disclosure relates to assemblies of thin-walled tubes and mandrels for use in thin wall catheter liners. For example, an assembly is provided that includes a thin-walled PTFE tube comprising walls with a thickness of less than 0.004 inches, positioned over a filled mandrel comprising PTFE with one or more fillers incorporated therein. The disclosure further provides, independently, thin-walled tubes and filled mandrels, as well as methods of making and using such components.

The invention relates to a system (10) for transporting a film tube (2) in a blown film line (1) along a transport direction, having a guiding unit (51) for guiding the film tube (2), a bottleneck (13.1) at which a width (2.3) of the film tube (2) can be reduced, a severing apparatus (20) having at least one severing element (21) for severing the film tube (2), wherein the guiding unit (51) is arranged downstream of the bottleneck (13.1) in the transport direction of the film tube (2). The invention furthermore relates to a blown film line (1) and to a method (100) for producing a film.

The present invention relates to an external cooling system for a molten film tube produced by a blown film tubular extrusion process, comprised of one or more enclosures with one or more respective cavities that directly receive a portion of cooling gas emanating from one or more associated cooling elements. Each enclosure includes a port containing a variable exhaust device and optional flow buffer, acting to maintain a pressure differential between the cavity and an adjacent inside volume of the molten film tube, adjustable to optimize molten film tube stability cooling element efficiency and spaced apart dimension between cooling elements. Additionally, at least one cooling element is provided, comprised of a divergent cooling element with a divergent cooling interface containing a cooling gas deflector spaced adjacent to the molten film tube and providing an expelled cooling gas.