A thermally expandable sheet includes: a first thermally expansive layer that is formed on one side of a base and contains a first thermally expandable material; and a second thermally expansive layer that is formed on the first thermally expansive layer and contains a second thermally expandable material, wherein the second thermally expandable material further contains white pigment.

An insulation material formed of a composition, and a method of making an insulation material is provided. The composition forming the insulation material includes magnesium oxide; at least one of magnesium chloride, magnesium sulfate, and hydrates thereof; water; a foaming agent; a thickener; and a foam stabilizer. The composition is foamed to promote aeration of the composition to reduce density of the insulation material formed from the composition.

Expanded polyethylene resin particles include an antistatic agent and a base resin. The expanded polyethylene resin particles are obtained by expanding polyethylene resin particles including the antistatic agent and the base resin, the polyethylene resin particles having a storage modulus of elasticity of 900 to 5000 Pa at an angular frequency of 1 rad/sec in dynamic viscoelastic behavior measurement at 190° C. and a storage modulus of elasticity of 100000 Pa or less at an angular frequency of 100 rad/sec in dynamic viscoelastic behavior measurement at 190° C. The expanded polyethylene resin particles have a low temperature side melting peak and a high temperature side melting peak on a differential scanning calorimetry (DSC) curve obtained when a temperature of the expanded polyethylene resin particles is increased from 20° C. to 220° C. at a heating rate of 10° C./min.

A method of producing a polyethylene resin expanded molded product includes filling a mold with expanded polyethylene resin particles, wherein an internal pressure of 0.12 to 0.16 MPa is applied to the expanded polyethylene resin particles in the mold, and forming the polyethylene resin expanded molded product by heating the expanded polyethylene resin particles and fusing the expanded polyethylene resin particles. The expanded polyethylene resin particles includes 100 parts by weight of a polyethylene resin, 0.08 to 0.25 parts by weight of a cell nucleating agent, 0.3 to 0.8 parts by weight of a polyhydric alcohol fatty acid ester, and 0.01 to 10 parts by weight of a hydrophilic compound, each of the expanded polyethylene resin particles having a weight of 2.5 to 3.5 mg. The polyethylene resin expanded molded product has a density of 0.017 to 0.021 g/cm.sup.3 and a thickness of 10 to 40 mm.

Disclosed is a fiber structure including a halogen-free polymer layer such as a styrenic block (SBC) copolymer. The fiber structure has environmentally-friendly properties and reduced weight, as compared to conventional materials such as PVC and has improved low temperature stability, fixing ability and resistance to deformation.

High strength biomedical materials and processes for making the same are disclosed. Included in the disclosure are nanoporous hydrophilic solids that can be extruded with a high aspect ratio to make high strength medical catheters and other devices with lubricious and biocompatible surfaces.

A thermally expandable sheet includes: a first thermally expansive layer that is formed on one side of a base and contains a first thermally expandable material and a first binder, the first thermally expansive layer having a first ratio of the first thermally expandable material with respect to the first binder; and a second thermally expansive layer that is formed on the first thermally expansive layer and contains a second thermally expandable material and a second binder, the second thermally expansive layer having a second ratio of the second thermally expandable material with respect to the second binder, wherein the first ratio is lower than the second ratio.

Provided is a method for manufacturing a foam molded body that can make a shape of bubbles close to a perfect circle. According to the present disclosure, a method for manufacturing a foam molded body, including a step of forming a foam parison from a melt-kneaded resin obtained by melting and kneading a raw material resin and a foaming gas in a cylinder of an extruder and molding the foam parison to obtain the foam molded body, wherein the foaming gas contains 0.1 to 1.0% of argon, is provided.

A polymer composition for use in the removal and recovery of oil slicks or spills floating on the surfaces of bodies or water or present on land, such as beaches comprising a foam of a blend of polyethylene and an ethylene-alkyl acrylate copolymer and a process for using such foams in the selective removal of oil from fresh water or salt water and the recovery of the absorbed oils from the foams is disclosed. The polymer composition is also for use in other applications in which absorption of liquids is desired.

An expanded polyolefin resin particle is obtained by expanding a polyolefin resin particle using water and/or an inorganic gas as a foaming agent. The polyolefin resin particle includes a polyolefin resin, a product obtained by heating and kneading a mixture, and a water absorbing substance, wherein the mixture includes a first polypropylene resin, a polypropylene wax, a polyorganosiloxane including at least one silicon-atom-bound radical polymerizable functional group per molecule, and an organic peroxide.