A laminated foam sheet having a polyethylene resin foam layer and an antistatic polyethylene layer laminated on one or both sides thereof is produced by coextruding melts for respective layers, wherein the melt for the antistatic layer contains a polyethylene resin, an ionomer resin antistatic agent and a specific amount of volatile plasticizer blend containing an alcohol and a saturated hydrocarbon or a dialkyl ether. The antistatic layer of the obtained laminated foam sheet has specific morphology.

The present disclosure is directed to a physically crosslinked, closed cell continuous multilayer foam structure comprising at least one foam polypropylene/polyethylene layer with a TPU cap layer. The multilayer foam structure can be obtained by coextruding a multilayer structure comprising at least one foam composition layer with at least one cap composition layer, irradiating the coextruded structure with ionizing radiation, and continuously foaming the irradiated structure.

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 resin sheet is provided that provide both light-weight properties and mechanical strength using a thermoplastic resin with high deflection temperature under load. The resin sheet is formed from a thermoplastic resin, including: a core layer being a foam resin layer; and skin layers located outward of the core layer as determined along the thickness direction, the core and skin layers forming a continuity. The core layer includes a region A1 and regions A2 each located between the region A1 and the associated skin layer. The regions A2 has a lower average porosity than the region A1, said average porosity being lower than 50%. The thermoplastic resin has a deflection temperature under load not lower than 90° C. The resin sheet has a thickness of 1 to 40 mm. Each skin layer has a thickness of 5 to 50% of the thickness of the resin sheet.

It is provided a WPC extrusion profile comprising a WPC material, in which plant fibers are embedded in a plastic matrix, wherein the WPC material has a content of naturally growing plant fibers of between 30 and 75 wt-%, and the WPC extrusion profile includes at least one foam-filled hollow chamber. The at least one hollow chamber of the WPC extrusion profile is completely filled up with a foam, in particular a closed-pore foam. The foam includes or consists of a plastic material of the same type of plastic as the matrix of the WPC material. The foaming is effected by using a physically acting blowing agent, in particular CO.sub.2, wherein the density of the foam is less than 0.4 g/cm.sup.3 and the average cell size of the foam has a mean diameter of less than 0.4 mm.

The invention relates to a structured body and a method for its preparation, whereby the structured body is produced of at least one powdery starting material by application of heat and/or pressure, and has several layers, whereby the starting material consists predominantly of thermoplastic basic material, and whereby the density of at least two layers of the structured body differ from each other, and whereby at least one layer of lower density contains hollow microspheres.

Laterally-coalesced foam slabs and methods and apparatus, including foaming dies, for making and using such foam slabs.

A composition for producing a sheet material with a cellular structure, the composition including the following components: (a) about 5 to about 25 weight % gelatine, (b) about 25 to 60 weight % filler material, (c) about 15 to about 40 weight % water, and (d) a cellular structure promoting agent.

Films may be used as interleaves between hard and non-compressible surfaces such as surfaces of sheets or plates made of glass, metal, such as steel, polycarbonate, and/or poly(methyl methacrylate). The films may be embossed and/or may include a foamed core layer having a plurality of micro-voids. In particular, the films may include a polyolefin, a basis weight of between about 30 gsm and about 70 gsm, an embossed thickness of between about 150 microns and 800 microns, and a stiffness of between about 150 grams and about 750 grams according to the Circular Bend Stiffness Test.

Films may be used as interleaves between hard and non-compressible surfaces such as surfaces of sheets or plates made of glass, metal, such as steel, polycarbonate, and/or poly(methyl methacrylate). The films may be embossed and/or may include a foamed core layer having a plurality of micro-voids. In particular, the films may include a polyolefin, a basis weight of between about 30 gsm and about 70 gsm, an embossed thickness of between about 150 microns and 800 microns, and a stiffness of between about 150 grams and about 750 grams according to the Circular Bend Stiffness Test.