A novel multilayer plastic film is provided comprising a series of component layers and optionally bonding layers to tie said component layers together, said component layers comprising: a central oxygen barrier layer, a first polymeric barrier layer on a first side of said central oxygen barrier layer, a second polymeric barrier layer on a second side of said central oxygen barrier layer, an outer layer adjacent the first polymeric barrier layer for providing mechanical strength, and a sealant layer adjacent the second polymeric barrier layer. At least one layer comprises two different polymers.

A thermal/acoustic insulation product, such as for an aircraft, comprising a block of flexible, open-celled, cellular foam having a predefined shape and having a thermoformed amorphous film covering that completely envelops the foam block. A process for making the insulation product includes first cutting the block of foam to a predefined shape, such as a shape suitable for placement in an area of an aircraft in need of insulation. Then, a first sheet of film is heated to its melt point and conformed to a first surface area of the block, and a second sheet of film is heated to its melt point and conformed to a second surface area of the block, wherein the first film and the second film are joined to one another at one or more seams. The insulation product may then be installed in an aircraft.

The present invention contemplates a method for forming a composite structure including a plurality of rigid layers and one or more reformable epoxy resin layers. The resulting composite is molded to form a non-planar composite structure.

A thermally expandable sheet includes: a first thermally expansive layer that is formed on one side of a base and contains a first thermally expandable material and a first binder, the first thermally expansive layer having a first ratio of the first thermally expandable material with respect to the first binder; and a second thermally expansive layer that is formed on the first thermally expansive layer and contains a second thermally expandable material and a second binder, the second thermally expansive layer having a second ratio of the second thermally expandable material with respect to the second binder, wherein the first ratio is lower than the second ratio.

A film capable of covering an article having a three-dimensional shape by heat expansion provided by one embodiment of the present disclosure comprises an outermost layer disposed on an outermost surface, and a polyurethane thermal adhesive layer, which contains a thermoplastic polyurethane selected from the group consisting of polyester-based polyurethanes and polycarbonate-based polyurethanes and is thermally adhered to the article during the heat expansion, wherein the fracture strength of the polyurethane thermal adhesive layer is not less than 1 MPa at 135° C., and the storage modulus at 150° C. and frequency 1.0 Hz is from 5×10.sup.3 Pa to 5×10.sup.5 Pa, and the coefficient of loss tan δ is not less than 0.1.

The invention concerns an article comprising layers of polylactic acid and a process of making the same. A layer is of foamed polylactic acid. A layer preferably comprises an impact modifier. The article can be used in the field of packaging.

The present invention is related to a battery module packaging comprising a multilayer structure 1, said structure comprising an inner polymer layer 2, an outer polymer layer 4 and an aluminum foil 5 sandwiched between the inner polymer layer 2 and the outer polymer layer 4, or an inner polymer layer 2, an outer polymer layer 4, an aluminum foil 5 sandwiched between the inner polymer layer 2 and the outer polymer layer 4 and an intermediary layer 3 sandwiched between aluminum foil 5 and inner polymer layer 2. In use, the inner polymer layer 2 is in direct contact with the cell part of the battery and the outer polymer layer 4 is in contact with a hardware element of the battery.

This invention relates to a polymer composition that is particularly suitable for use in the manufacture of thermoformed articles, which can be biodegraded in industrial composting. This invention also relates to a process for the production of the said composition and articles obtained thereby.

Embodiments of multilayer film structures comprise at least one elastic layer comprising thermoplastic elastomer, at least one barrier layer comprising ethylene vinyl alcohol, polyamides, polyvinylidene chloride, or combinations thereof, and at least Cone tie layer disposed between and adhering the at least one elastic layer to the at least one barrier layer, wherein the at least one tie layer comprises thermoplastic elastomer and functionalized olefin-based polymer.

A physically crosslinked, closed cell continuous multilayer foam structure comprising at least one polypropylene/polyethylene coextruded foam layer is obtained. The multilayer foam structure is obtained by coextruding a multilayer structure comprising at least one foam composition layer, irradiating the coextruded structure with ionizing radiation, and continuously foaming the irradiated structure.