Provided herein are seam tapes and related methods. The seam tapes can be compatible with polyolefin-based waterproof/breathable (w/b) membranes, including polypropylene (PP) w/b membranes and/or polyethylene (PE) w/b membranes. Also provided are seams sealed by means of these seam tapes, as well as materials, fabrics, and garments including one or more of these sealed seams.

A method of making a pre-stretched plastic packaging film comprising co-extruding a top layer, a bottom layer, and a core layer into a multilayer film intermediate product, wherein the top layer and bottom layer comprise at least about 95 wt % polyethylene resin, and the core layer comprises polyethylene resin and filler particles; stretching the multilayer film intermediate product to impart cavitation in the core layer in the area of the filler particles to form a pre-stretched polyethylene-based film; and rolling the pre-stretched polyethylene-based film onto a roller to form a roll of pre-stretched polyethylene-based film. A multilayer pre-stretched plastic packaging film comprising: a core layer sandwiched between a top layer and a bottom layer wherein the top layer and bottom layer comprise at least about 95 wt % polyethylene, and the core layer comprises filler particles having a particle size of 0.1 to 20 μm in a polyethylene-based matrix comprising at least about 95 wt % polyethylene.

The polyester sheet in accordance with an aspect of the present invention contains crystals of polyester which is a polycondensate of polyvalent carboxylic acid and polyalcohol. The polyester sheet contains nano-oriented crystals which contain crystals of polyester in each of which a polymer chain is highly oriented and each of which has a crystal size of 50 nm or less. A heatproof temperature of the polyester sheet is higher than a temperature that is lower than an equilibrium melting point of the polyester by 80° C., and a melting point of the polyester sheet is higher than a temperature that is lower than the equilibrium melting point of the polyester by 40° C.

The invention relates to a multilayer biaxially oriented polyester film comprising a base layer B, an amorphous outer layer A and a further outer layer C, where this polyester film is suitable for lamination with metal sheets. The invention in particular relates to a polyester film which comprises (based on the mass of polyester) from 2 to 15% by weight of isophthalate-derived units in the base layer and which comprises more than 19% by weight of isophthalate-derived units in the amorphous layer A, and which has a silane-based coating on the outer layer A. The invention further relates to a process for the production of these films.

A battery packaging material has an excellent ink printing characteristic on a base-layer-side surface. This battery packaging material has a laminated body formed by sequentially stacking at least a base layer, a metal layer, and a sealant layer, with the wet tensile strength of the surface of the base layer being 32 mN/m or greater.

The present invention is related to flexible multilayer laminates having an integrated, one-way pressure-release valve for use in a sealed container for packing gas-producing products. The pressure-release valve is partly disconnected from the rest of the laminate, forming an inflatable outlet tube with at least one large outlet opening and lifting off from the laminate under increased pressure in the pack. The one-way pressure-release valve allows for pressure release at low minimum opening pressure in a reliable and reproducible way.

A stretch-modified elastomeric multilayer film comprising a core layer comprising a first propylene/alpha-olefin copolymer, wherein the first propylene/alpha-olefin copolymer comprises at least 50 wt. % propylene, has a melt flow rate (230C/2.16 Kg) from 0.1 g/10 min to 35 g/10 min, and has a crystallinity in the range of from at least 1 percent by weight to 40 percent by weight, and at least one outer layer independently comprising a second propylene/alpha-olefin copolymer and from 2.5 to 30 wt. % of an antiblock agent, wherein the second propylene/alpha-olefin copolymer comprises at least 50 wt. % propylene, has a melt flow rate (230C/2.16 Kg) from 0.1 g/10 min to 35 g/10 min, and has a crystallinity in the range of from at least 1 percent by weight to 40 percent by weight, wherein the crystallinity of the first propylene/alpha-olefin copolymer is equal to or greater than the crystallinity of the second propylene/alpha-olefin copolymer.

The method is for manufacturing a tube in which a stretching film is fastened for a length of over one turn on both sides of a tube mesh that is only expandable on a circumference thereof. Each film is also fastened to itself. An expandable tube is formed which is expandable to a circumference allowed by the tube mesh.

Laterally-coalesced foam slabs and methods and apparatus, including foaming dies, for making and using such foam slabs.

Provided are an adhesive resin laminate having an excellent adhesive force to two adherends, a laminate in which this adhesive resin laminate is laminated with two adherends, and a method of producing them. An adhesive resin laminate having at least a first adhesive layer and a second adhesive layer, in which the first adhesive layer includes a base resin and a crosslinking agent, the base resin is a modified polyolefin resin, the crosslinking agent is an epoxy-based compound, the second adhesive layer includes a polyolefin-based resin, and when an adhesion initiation temperature of the first adhesive layer is set to T1, and an adhesion initiation temperature of the second adhesive layer is set to T2, T2 is higher than T1 by 30° C. or more.