Membranes and methods for producing them are disclosed. The membranes comprise a core layer comprising a composite of alternating thermoplastic polyurethane (TPU) and barrier microlayers, and they comprise at least one cap layer that is bonded to the core layer or a structural layer. In some embodiments, at least the cap layer comprises a polydiene polyol-based TPU. The membrane may further comprise a rubber layer bonded to the cap layer.

Methods and systems for co-extruding multiple polymeric material flow streams into a mold cavity to produce a molded plastic article having an injection-formed aperture in gate region of the article are disclosed herein. A method includes providing a valve pin having a distal portion with a first diameter and a mid-portion with a second diameter smaller than the first diameter and providing a mold defining a cavity corresponding to a shape of a resulting molded plastic article. The mold has a recess aligned with a gate region of the mold, extending into the mold and configured to receive the distal portion of the valve pin when the distal portion of the valve pin extends beyond the gate region. The method includes advancing the distal portion of the valve pin into the recess until the mid-portion of the valve pin at least partially extends into the gate region, thereby establishing a flow path for a combined polymeric stream into the cavity at the gate region for forming a molded plastic article having at least one layer of a first polymeric material and at least one layer of a second polymeric material. The method also includes withdrawing the mid-portion of the valve pin from the gate region, thereby forming an injection-molded aperture in the resulting molded plastic article at the gate region.

Membranes and methods for producing them are disclosed. The membranes comprise a core layer comprising a composite of alternating thermoplastic polyurethane (TPU) and barrier microlayers, and they comprise at least one cap layer that is bonded to the core layer or a structural layer. In some embodiments, at least the cap layer comprises a polydiene polyol-based TPU. The membrane may further comprise a rubber layer bonded to the cap layer.

A sealing film suitable for food packaging is provided, which adopts the following solution. The sealing film comprises, in sequence, a PET layer, a VMPET layer and a PE layer from inside to outside, wherein the PE layer comprises 100-110 parts of PE, 15-20 parts of EVA, 15-20 parts of EAA, 55-60 parts of HDPE and 10-15 parts of LLDPE in parts by mass. In this manner, the addition of HDPE and LLDPE into the PE layer is intended to enhance the tensile strength of the sealing film.

A coinjection molded multi-layer container includes an inner layer, an outer layer, and a barrier layer. The inner layer includes a first polymeric material and forms an inside surface of the container. The outer layer includes the first polymeric material and forms an outside surface of the container. The barrier layer is located between the inner layer and the outer layer and includes a second polymeric material less permeable to gas than the first polymeric material. The barrier layer is biased toward the inside surface or the outside surface such that the inner layer and the outer layer have different thicknesses.

A multilayer body comprising a sealing layer (A) comprising a thermoplastic resin, an oxygen absorption layer (B) comprising a thermoplastic resin and iron powder, and an oxygen barrier layer (D) having oxygen barrier properties, the layers being laminated in a described order, wherein at least one of the sealing layer (A) and the oxygen absorption layer (B) comprises an ionomer as the thermoplastic resin.

A battery packaging material including a laminate that is provided with a barrier layer, a heat-fusible resin layer positioned on one surface side of the barrier layer, and a polyester film positioned on other surface side of barrier layer. This battery packaging material is configured from at least a laminate provided with a barrier layer, heat-fusible resin layer positioned on one surface side of barrier layer, and a polyester film positioned on other surface side of barrier layer. When infrared absorption spectrum on the polyester film's surface in 18 directions at intervals of 10? from 0?-180? is obtained using total reflection method of Fourier transform infrared spectroscopy, the ratio of the maximum value and the minimum value of the ratio (Y.sub.1340/Y.sub.1410) of the absorption peak intensity Y.sub.1340 in 1340 cm.sup.?1 and the absorption peak intensity Y.sub.1410 in 1410 cm.sup.?1 in the infrared absorption spectrum is in the range of 1.4-2.7.

A plastic tank for a motor vehicle and a method for producing such a plastic tank for a motor vehicle. The tank shell has a multi-layered structure, including at least one layer composed of high-density polyethylene, at least one barrier layer, and at least one regrind layer composed of recycled plastic arranged between the at least one layer composed of high-density polyethylene and the at least one barrier layer. The at least one regrind layer and/or the at least one layer composed of high-density polyethylene contains spherical fillers or fibrous fillers.

A bag having a front panel and a back panel coupled together through a plurality of seals, defining a cavity structurally configured to retain a flowable material. The panels are formed from a film that has a first film portion and a second film portion laminated together at an interface. The first film portion has an inner surface and an outer surface and includes an oriented polyethylene. The second film portion is a coextrusion having an inner surface and an outer surface. The extrusion has a core, with a first overlying layer on one side of the core and a second overlying layer on a second side of the core opposite the one side. The core includes EVOH. The first overlying layer and the second overlying layer include polyethylene.

An injection-molded preform for manufacturing plastic containers, for example plastic bottles, in a stretch blow molding process is disclosed. The preform can have an essentially elongated preform body, whose one longitudinal end is formed closed. On an opposite longitudinal end, the preform body is connected to a neck section that is provided with a pour opening and whose outer wall has a connector to make an interlocking connection with a closure that is equipped with corresponding engagement. The neck section has at least one constriction that extends all the way around and has a wall thickness of between 0.4 mm and 0.8 mm. The injection-molded plastic material exists at least on the at least one constriction in a state that is highly oriented and at least partially crystalline, due to an injection-molding process.