Provided herein are sinterable films and pastes as conductive die attach materials having advantageous properties for use in die semiconductor packages. Also provided are formulations useful for the preparation of such films and pastes, as well as methods for making such formulations. In additional aspects of the present invention, there are provided conductive networks prepared from compositions according to the present invention. In certain aspects, the invention relates to articles comprising such sintering films and pastes adhered to a suitable substrate therefor.

The present invention relates to a sealing foam, a respirator, and a method for manufacturing a sealing foam. The sealing foam includes: a main body part, the main body part being a porous foam; an air-proof film on a continuous surface; and an anchor layer, the anchor layer being continuously provided on the upper layer of the main body and provided between the air-proof film and the main body part, and the anchor layer being partially embedded in pores of the porous foam. The respirator includes a respirator main body and a sealing foam of the present invention. The method for manufacturing a sealing foam includes: providing a porous foam to prepare a main body part of a sealing foam, and providing an anchor layer and an air-proof film on the porous foam, so that the air-proof film is continuously provided on an upper surface of the main body part, wherein the anchor layer is provided between the air-proof film and the main body part, and is partially embedded in pores of the porous foam. The sealing foam, the respirator, and the method for manufacturing a sealing foam according to the present invention are convenient for subsequent cutting, can simplify the manufacturing process of the sealing foam, improve the sealing between the respirator and the face of a wearer, and improve the wearing comfort of the respirator.

Provided are breathable films and a process for making breathable films. The breathable films comprise a filler and a polymer blend comprising a polyolefin and ethylene copolymer. The process for making the breathable films comprise extruding a polymer blend and a filler, forming a film from the extruded polymer blend and filler, and stretching the film to form a breathable film. The breathable films according to embodiments disclosed herein can exhibit increased WVTR values and can reduce filler dropping while providing improved micro-void uniformity.

A shielded, multi-layer heatshield material for hypersonic flight applications includes an ablative/insulative structure having a thickness and providing both thermal insulation and a first ablation resistance, and a separate shield layer bound to an outer surface of the ablative/insulative structure, the shield layer being thinner than the ablative/insulative structure while providing a second higher ablation resistance greater than the first ablation resistance. In one arrangement the ablative/insulative structure includes a carbon/carbon composite layer attached to a syntactic carbon foam layer, using carbon fiber stitched loops for reinforcement, and the shield layer is a carbide outer layer. In another arrangement the ablative/insulative structure includes a silica composite layer attached to a silica insulative foam layer, using stitched loops for reinforcement, and the shield layer is a ceramic outer layer.

Provided is a feedstock comprising a polyolefin homopolymer such as polypropylene, polybutylene terephthalate (PBT) and a pigment having a refractive index of at least 1.5 complexed by maleic anhydride functionalized polypropylene (MAH-PP). Further provided are polyolefin films having a cavitated layer comprising the feedstock and methods of making such films.

One or more implementations of a multi-film thermoplastic structure include a first film having a first appearance in contact with a second film having a second appearance at one or more visually distinct contact areas, including a continuous contact area spanning a width of the structure. In one or more implementations the multi-film thermoplastic structure comprises a thermoplastic bag and the continuous contact area forms a hem seal near a top opening of the thermoplastic bag.

Provided are a laminate including a polymer film in which a linear expansion coefficient of at least one surface X is smaller than a linear expansion coefficient of an inside and a metal layer or a metal wire, which is provided on a surface Y side opposite to the surface X of the polymer film; and a polymer film in which a linear expansion coefficient of at least one surface X is smaller than a linear expansion coefficient of an inside.

Laminates providing a simultaneous benefit of desirable breathability and puncture resistance are provided. The laminates include a nonwoven fabric and a vapor-permeable and liquid impermeable (VPLI) film bonded to the nonwoven fabric by an adhesive layer that is located between the nonwoven fabric and the VPLI film. The VPLI film has (i) a moisture vapor transmission rate (MVTR) of at least about 2000 Mocon or g/m.sup.2/24 hours as determined according to EDNA/INDA Worldwide Strategic Methods: WSP 70.4(08) and/or (ii) a puncture resistance of at least about 5 N as determined according to UNI EN 863:1997+UNI EN 14325:2005 Par. 4.10+UNI EN 13034:2009 Par. 4.1 with test conditions of (20+/−2)° C. at (65+/−4)% U.R. with an extension rate of 100 mm/min.

A separator includes a porous substrate, and a porous layer formed on one or both surfaces of the substrate and containing a polyvinylidene fluoride type resin and a filler, in which the filler content in the porous layer is from 30 to 80% by mass with respect to the total mass of the polyvinylidene fluoride type resin and the filler, and the polyvinylidene fluoride type resin is at least one resin selected from the following resin A and B: resin A: a copolymer having a weight average molecular weight of from 100,000 to 350,000, and a content of HFP is more than 5% by mass but not more than 11% by mass; and resin B: a copolymer having a weight average molecular weight of from 100,000 to 1,000,000, in which a content of HFP is more than 11% by mass but not more than 15% by mass.

A multilayer membrane comprising at least two co-extruded layers where the two co-extruded layer contain different polymers and one of the two co-extruded layers contains an extrusion additive. Examples of useful extrusion additives may include a nucleating agent or a pore-forming particulate. A method for making the membrane is also disclosed. Using an extrusion additive when co-extruding two different polymers avoids some of the drawbacks associated with processes involving the co-extrusion of different polymers, particularly processes where a co-extruded non-porous precursor is later stretched to form pores. For example, the drawback of lower permeability, difficulty to make lower Gurley, and splittiness may be improved.