A molded article of polypropylene-based resin expanded beads, obtained by in-mold molding of the polypropylene-based resin expanded beads, each bead including: a core layer, in a foamed state, having a polypropylene-based resin; and a covering layer, which covers the core layer, having a polyethylene-based resin. A molded article magnification X [times] of the molded article is 55 times to 90 times, a value of a product X.Math.σ.sub.50 of a 50% compressive stress σ.sub.50 [kPa] and the molded article magnification X is 6500 or more, and a 5% compressive stress σ.sub.5 of the expanded beads molded article is 5 kPa to 25 kPa.

A composite material according to the present invention includes a solid portion including inorganic particles and a resin. The composite material has a porous structure including a plurality of voids facing a wall surface of the solid portion. At least a portion of the inorganic particles is present on a wall surface. The plurality of voids are in contact with each other directly or via the inorganic particle. A heat transmission path stretching through the plurality of voids is formed of the inorganic particles in contact with each other.

The present invention aims to provide a foam that is less likely to deflate even after prolonged or repeated load application, has low density, and has good appearance quality, and a method for producing the foam. Provided is a foam including cells dispersed in an elastomer resin, the cells having an average diameter of 40 to 60 μm and an average circularity of 0.990 or greater.

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.

A composite material according to the present invention includes a solid portion including inorganic particles and a resin. The composite material has a porous structure including a plurality of voids surrounded by the solid portion. The composite material compressed by 10% has a reaction force of 0.1 kPa to 1000 kPa, and the composite material has a heat conductivity of 0.5 W/(m.Math.K) or more. The heat conductivity is a value measured for one test specimen in a symmetric configuration according to an American Society for Testing and Materials (ASTM) standard (ASTM) D5470-01.

The thermoplastic elastomer composition contains a thermoplastic elastomer and a pigment.

A charging member for an image forming apparatus may include a conductive support and a surface layer on the conductive support and not in contact with a photosensitive member. The surface layer may comprise a urethane foam including foam cells and having a foam structure based on the foam cells, the foam cells including open cells.

Embodiments of the present disclosure provide for methods of detecting, sensors (e.g., chromogenic sensor), kits, compositions, and the like that related to or use tunable macroporous polymer. In an aspect, tunable macroporous materials as described herein can be used to determine the presence of a certain type(s) and quantity of liquid in a liquid mixture.

A monolithic organic porous ion exchanger having a continuous skeleton and continuous pores, wherein the continuous skeleton is formed of an organic polymer being a hydrolysate of a crosslinked polymer of a (meth)acrylic acid ester and divinylbenzene, the organic polymer having any one or both of a —COOH group and a —COONa group as ion-exchange groups, the continuous skeleton has a thickness of 0.1 to 100 μm, the continuous pores have an average diameter of 1.0 to 1000 μm, the monolithic organic porous ion exchanger has a total pore volume of 0.5 to 50.0 mL/g, and has a total ion-exchange capacity of the —COOH group and the —COONa group per weight in a dry state of 4.0 mg equivalent/g or more.

A foamed sheet includes an aliphatic polyester resin and a filler. An average foam diameter of the foamed sheet is 15 micrometers or less. An average thickness of the foamed sheet is 3,000 micrometers or less. A ratio of a length of a side of the foamed sheet in a longer direction or a side of the foamed sheet in a direction perpendicular to the longer direction to the average thickness is 250 or more.