Disclosed are compositions and methods for multilayer films, which, in one embodiment may comprise a core layer comprising at least 50 wt. % of high-density polyethylene. Further, the multilayer film may include a first skin layer comprising at least 80 wt. % of high-density polyethylene, and a second skin layer comprising either: (i) one or more low-density polyethylenes; or (ii) one or more polypropylene-based copolymers. The multilayer film may be oriented in at least one direction.

The present invention relates to a multilayer film including at least one film surface which has an increased surface roughness achieved by protrusion creating particles. The at least one film surface may have a surface roughness characterized by a coefficient of roughness (CR) of ≥0.02 or a Parker Print Surf roughness of at least 2 μm.

A laminate includes a substrate layer and a heat-sealing layer. A fold of the laminate produced by a weight of a 2 kg roller has a folding angle of 20 to 55°, and a content of polyethylene in the laminate is 90% by mass or more. The folding angle may be 25 to 55°. The substrate layer may contain high-density polyethylene. The substrate layer may be a uniaxially oriented linear low-density polyethylene film or an unstretched film made of polyethylene.

Provided are a multilayer film having excellent gas permeability and excellent handling properties and hence is suited for forming a cell culture container, and a cell culture container formed by using the same. A multilayer film used for forming a cell culture container, comprising: a base material composed of a polyethylene-based resin having a density of 0.87 g/cm.sup.3 to 0.90 g/cm.sup.3; and an inner layer composed of a polyethylene-based resin having a density of 0.896 g/cm.sup.3 to 0.93 g/cm.sup.3 and forming a cell culture icy surface. A cell culture container is formed by using this multilayer film.

A thermoregulation article includes a metal film, a polymer film disposed on the metal film, and a colorant film disposed on the metal film. The thermoregulation article has at least one side having an average reflectivity greater than 0.5 at a wavelength of 0.3-4 μm and an average emissivity less than 0.4 at a wavelength of 4-20 μm.

Provided herein are films comprising a core layer sandwiched between an outer layer and a scaling layer. The film has a seal initiation temperature at 5 N/15 mm between about 82° C. and about 88° C., a 1% secant modulus m MD between about 300 MPa and about 400 MPa, and plateau seal strength at between about 16 and about 17 N/15 mm. While the outer layer and core layers comprise polyethylene compositions, the sealing layer comprises a polyethylene blend. The polyethylene blend comprises a plastomer and a polyethylene composition in an amount equal to or less than 50 wt %.

Provided is a laminate having a porous layer that can ensure the drying property of a printing ink and can also be produced with less gum residue generated. A laminate comprising a substrate layer (A) and a porous layer (B), wherein the porous layer (B) comprises a thermoplastic resin and a filler, the filler comprises a filler having a hydrophobized surface, as a part thereof, and the porous layer (B) has a liquid-absorptive capacity of 10 to 40 cc/m.sup.2 as measured in accordance with JIS P 8140:1998 with a 70 mass % ethanol aqueous solution.

A breathable thermoplastic polymer film may be produced and adapted for use as a breathable diaper backsheet. The film may comprise a blend of LLDPE, mLLDPE and calcium carbonate, and may have improved tear strength and melt strength such that instances of tears or break offs during the machine direction orientation portion of the production process are significantly reduced or eliminated. In addition, the film may have sufficient tear strength to permit omission of CDI processing needed to strengthen weaker prior art films. In this regard, undesired streaking of colors or printed aspects of the film may be reduced or avoided completely.

A multi-laminate film includes a first biaxially oriented film having a first machine direction angle and a first spiral cut oriented film having a second machine direction angle different than the first machine direction angle. The multi-laminate film also includes at least one of a second biaxially oriented film having the first machine direction angle or a second spiral cut oriented film. The first biaxially oriented film, the first spiral cut oriented film and the at least one of the second biaxially oriented film or second spiral cut oriented film are laminated together.

A multilayer structure comprising a multilayer polyethylene film and a metal layer is provided, wherein an outer layer of the polyethylene film comprising 200 to 4000 ppm fluoroelastomer processing aid based on the weight of the outer layer, and the metal layer comprising a metal deposited on the outer layer of the polyethylene film. A laminate comprising the multilayer structure and an article comprising the laminate or the multilayer structure are also provided.