The invention relates to the manufacturing of porous polymer membranes by (a) providing pellets comprising a polymer matrix and particles in the ratio 90:10 to 10:90, (b) converting said pellets into a non-porous film by a solvent-free process; (c) removing said particles from said film with an aqueous composition to thereby obtain said membrane. The invention further relates to pellets useful in such manufacturing process as well as porous polymer membranes obtainable or obtained by such manufacturing process as well as textile materials and articles containing such membranes; to the use of such pellets, membranes, and articles.

A structural member including a lightweight core, one or more skins, and a crosslinking nanolayer interposed therebetween that results in significant mechanical strength in the structure. The core is a polymer of reduced density by way of included voids, such as an open or closed cell foam, honeycomb, or corrugated structure. The core polymer has a lower density and may have a higher softening or melting temperature than the polymer skin materials. The core may be discontinuous at the interface with the skin such that only a small percentage of the core surface is actually in contact with the skin compared to the overall area of the interface. The skin may be a thermoplastic layer that attaches to the core material. The skin may be a composite material including non-thermoplastic reinforcements. The crosslinking nanolayer is covalently bonded to the surface of the core material and provides molecular compatibility with the skin material.

A multilayer material, including a compressible polymer foam layer, wherein the compressible polymer foam layer has a density of less than 400 kg/m.sup.3, a compression force deflection of 5 to 1,035 kPa at 25% deflection determined in accordance with ASTM D3574-17, and a thickness of less than 3.5 millimeters; and a solid, polymeric flame retardant layer disposed on a first side of the compressible polymer foam layer, wherein the flame retardant layer has a thickness of less than 0.3 millimeters, wherein the thickness of the compressible polymer foam layer is at least two times greater than the thickness of the flame retardant layer; wherein each of the compressible polymer foam layer and the flame retardant layer includes a flame retardant composition, and wherein the multilayer material has a thickness of 3.5 millimeters or less, and a UL-94 rating of V1, preferably V0, HF1, or a combination thereof.

Described herein are physically crosslinked, closed cell continuous multilayer foam structures that includes a foam layer comprising polypropylene, polyethylene, or a combination of polypropylene and polyethylene and a polyamide cap layer. The multilayer foam structure can be obtained by coextruding a multilayer structure comprising at least one foam composition layer and at least one cap composition layer, irradiating the coextruded structure with ionizing radiation, and continuously foaming the irradiated structure.

This document discloses a process for manufacturing recyclable injection molded microcellular foams for use in, footwear components, seating components, protective gear components, and watersport accessories. The process includes the steps of providing a thermoplastic polymer which comprises at least one monomer derived from depolymerized post-consumer plastic, inserting a fluid into a barrel of a molding apparatus. The fluid is introduced under temperature and pressure conditions to produce a super critical fluid. The process further includes mixing the thermoplastic polymer and super critical fluid so as to create a single phase solution, and injecting the single phase solution into a mold of an injection molding machine under gas counter pressure. The process further includes foaming the single phase solution by controlling the head and temperature conditions within the mold.

A coextruded, multi-layered, water vapor-impermeable, tubular, and seamless food casing having at least three layers is provided. The layers include at least one porous layer having a porous food contact side suitable for transferring food additives having a porous food contact side, at least one carrier layer based on at least one aliphatic and/or partially aromatic (co-)polyamide, and at least one water vapor-impermeable layer. At least one adhesive layer including an adhesion-promoting component is arranged between the adjoining layers or an adhesion-promoting component is contained in one or more of the water vapor-impermeable layer(s). At least one porous layer includes an aliphatic (co-)polyamide and a hydrophilic (co-)polymer having a mean molar mass M.sub.w of at least 8000 Da. A method for producing the food casing is provided. The food casing is used as an artificial sausage casing, especially, for cooked or boiled sausage.

An artificial turf contains a damping layer made of a particle foam, a fiber backing, and an artificial grass layer made of single or multiple fibers. The fibers are tied to the fiber backing, forming an artificial carpet of grass. The particle foam and the single or multiple fibers forming the artificial grass layer are each made of a thermoplastic elastomer.

A resin sheet includes a porous structure. The porous structure is configured to adjust transmission of a millimeter wave. The porous structure has a relative permittivity varying in stages in a thickness direction of the resin sheet from a plane on which the millimeter wave is incident, the relative permittivity varying such that a difference between average relative permittivities in two adjacent layer portions is a predetermined value or less, the layer portions each having a particular thickness smaller than a wavelength of the millimeter wave. The porous structure has, as pores, only pores each having a pore diameter equal to or less than 10% of the wavelength of the millimeter wave.

An adhesive strip for application to an object, more particularly for application to an object with a strongly curved and/or angled surface or an object with a large surface area is disclosed. Methods of manufacturing and applying such an adhesive strip are disclosed as well. The adhesive strip includes a carrier structure with two opposite main expansion surfaces. At least one main expansion surface has an adhesive. Formed in the carrier structure are several weakened points penetrating the carrier structure from one main expansion surface in the direction of the other main expansion surface. The carrier structure is expandable in one tangential plane of one of the main expansion surfaces.

A method of installing a downhole device comprises introducing a downhole device into a wellbore, the downhole device comprising a substrate and a shape memory polymer in a deformed state disposed on the substrate; combining a modified activation material in the form of a powder, a hydrogel, an xerogel, or a combination comprising at least one of the foregoing with a carrier to provide an activation fluid; introducing the activation fluid into the wellbore; releasing an activation agent in a liquid form from the modified activation material; and contacting the shape memory polymer in the deformed state with the released activation agent in an amount effective to deploy the shape memory polymer.