A polymeric film, sheet, or extrusion coating is formed as a multilayered structure having at least one A layer and at least one B layer. The polymeric film, sheet, or extrusion coating is able to include at least 30% recycled content resin while also exhibiting improved stiffness and strength relative to films with purely virgin polymers. One embodiment of the present invention further presents improved oxygen barrier properties relative to existing films, sheets, or extrusion coatings. Due to the strong structural properties, the polymeric film, sheet, or extrusion coating allows for the inclusion of recycled content into applications where recycled content has previously not been able to be included, such as flexible food, pharmaceutical, or cosmetics packaging.

A blowing head, a method for producing a blown film, and a blown film installation include the use of plate spiral distributors in blown film installations for distributing melt steams arriving from extruders and for combining the melt streams to form an annular gap stream in several layers in an annular gap leading to a tubular die. The melt streams in a plate spiral distributor are initially bundled and then forwarded in a bundled manner to a common co-extrusion flow. The distributer has a plurality of spirals in superimposed layers, and the spirals of two layers have a junction for pre-combining the melt streams of two layers, and in that starting from the junction, a common guide leading to the annular gap is provided for combining there the pre-combined melt streams with the annular gap stream.

The invention provides a cover tape and the method for manufacturing the same. The cover tape comprises an antistatic layer, two intermediate layers, a base layer, two tie layers and a heat seal layer. These seven layers are formed by a co-extrusion process.

Described is a coextrusion head (1) comprising a plurality of infeeds (11, 12, 13, 14, 15) for fluid products, an inner joining space (16, 17), positioned downstream of said infeeds and communicating with them by means of respective delivery ducts (110, 120, 130, 140, 150) so as to allow flows of products to converge there and an outfeed (18) for the final multi-layer product, positioned downstream of the inner joining space (16, 17). In the head (1) there is a central delivery duct (110), provided for receiving a first flow of product and two lateral delivery ducts (120, 130), designed to receive, respectively, a second flow of product and a third flow of product. The head (1) also comprises adjustable narrowing means (31, 32), acting at least in the central delivery duct (110) and designed to vary a respective opening, to allow adjustment of the relative position of the first flow relative to a composite secondary flow defined by the joining of the first, second and third flow in the joining space (16) .

A modular disk coextrusion die is formed of a plurality of cells stacked together. Each cell includes an arrangement of thin annular disks, including at least a first cap disk, a first distribution disk, a first transition disk and a first spreader disk. The modular disk coextrusion die includes at least one channel disk having at least one inlet opening and at least two outlet openings per inlet opening. The thin annular disks are configured so that a first of the outlet openings of the channel disk is in fluid communication with the first distribution disk in the first cell and a second of the outlet openings in the channel disk is in fluid communication with the first distribution disk in the second cell. The channel disk provides for a more efficient utilization of space at the inlet of the modular disk coextrusion die and enables the feeding of up to twenty melt streams.

An integral geogrid includes a plurality of interconnected, oriented strands having an array of openings therein that is produced from a coextruded multilayer polymer sheet starting material. By virtue of the construction, the coextruded multilayer sheet components provide a crystalline synergistic effect during extrusion and orientation of the integral geogrid, resulting in enhanced material properties that provide performance benefits to use of the integral geogrid in soil geosynthetic reinforcement.

The invention provides a process of obtaining a bi-oriented co-extruded film of 7 layers by triple bubble process for autoclave sterilization processes, which unlike the current existing materials for food sterilization, the invention does not require an individual manufacturing process of each sheet and subsequent lamination, but it is manufactured in a single step, in addition no metal compound is included in its composition, and provides a shelf life of more than a year in food products that are packaged in the process of sterilization (retort) inside the film.

The present patent application relates to a method of manufacturing a multilayered composite film comprising a step of co-extruding at least three layers (a), (b) and (c), of which the layer (a) forms an outward surface of the composite film; the layer (c) forms a surface of the composite film facing or coming in contact with a good to be packaged; and the layer (b) is disposed between the layer (a) and the layer (c). Further, the method includes a step of biaxial orientation of the composite film thus co-extruded. Therein, the layer (a) contains or consists of a thermoplastic resin. The layer (b) contains or consists of a polyvinylidene chloride (PVdC) resin. The layer (c) contains or consists of a resin, preferably sealable, in particular heat-sealable resin. Therein, any crosslinking of the composite film by means of radioactive radiation, in particular by means of beta, gamma, X-ray and/or electron irradiation, is omitted during the manufacturing of the composite film and/or thereafter.

A multi-layer film comprising, an outer two layers of the multi-layer film comprising a linear low density polyethylene (LLDPE) butene resin, a next two inwardly successive layers of the multi-layer film comprising a linear low density polyethylene (LLDPE) hexene resin, wherein at least one of the next two inwardly successive layers comprises one or more recycled resin components, wherein at least one of the one or more recycled resin components are filtered using continuous filtration, a core layer of the multi-layer film comprising a linear low density polyethylene (LLDPE) hexene resin, and at least one edge of the multi-layer film comprising a folded edge.

An integral geogrid includes a plurality of interconnected, oriented strands having an array of openings therein that is produced from a coextruded multilayer polymer sheet starting material. By virtue of the construction, the coextruded multilayer sheet components provide a crystalline synergistic effect during extrusion and orientation of the integral geogrid, resulting in enhanced material properties that provide performance benefits to use of the integral geogrid in soil geosyuthetic reinforcement.