A polyolefin formulation comprising constituents (A) to (E) in the following amounts: from 15.0 to 55.0 weight percent (wt %) of (A) a polypropylene homopolymer; from 77.9 to 30.0 wt % of (B) a poly(ethylene-co-1-alkene) copolymer; from 3.0 to 6.5 wt % of (C) an ethylene/propylene diblock copolymer; from 4.0 to 8.0 wt % of (D) a saturated-and-aromatic (C.sub.14-C.sub.60)hydrocarbon; and from 0.1 to 1.5 wt % of (E) an antioxidant; wherein the wt % of (B) divided by the wt % (A) is a mass ratio of from 5.0:1.0 to 0.50:1.0; and wherein the amounts of constituents (A), (B), and (C) total from 88.0 to 95.9 wt % of the polyolefin formulation; and wherein the amounts of constituents (A) to (E) total from 92.1 to 100.0 wt % of the polyolefin formulation.

Provided is a method of making a polymeric composition comprising (a) providing a dispersion of initial polyolefin particles in an aqueous medium, wherein the initial polyolefin particles comprise (i) one or more hydrocarbon polyolefin, (ii) one or more non-hydrocarbon polyolefin, and (iii) one or more crosslinking agent; (b) contacting the initial polyolefin particles with a peroxide initiator to form crosslinked polyolefin particles.

The present invention discloses a multilayer composite rubber-plastic foam insulation material and a preparation method thereof. The composite rubber-plastic foam insulation material includes a two-layer structure; the two-layer structure includes an insulation layer and a first functional layer; the insulation layer and the first functional layer are both made of a rubber-plastic foam material; the first functional layer and the insulation layer are integrally molded by blending extrusion and vulcanization foaming, and the first functional layer and the insulation layer form an integral structure. The multilayer composite rubber-plastic foam insulation material provided by the present invention adopts a vulcanization foaming integral molding process, and not only ensures the thermal insulation property of the insulation layer, but also gives the functional layer corresponding functions by selecting different functional polymers, thereby satisfying a variety of personalized needs in engineering applications.

A thermoplastic elastomer composition including (A) ethylene rubber by 10 to 90 wt %, and (B) propylene polymer by 10 to 90 wt %, where a total amount of the thermoplastic elastomer composition is 100 wt %, is provided. A pressed sheet obtained by press-molding the thermoplastic elastomer composition under molding conditions has a sink-in temperature of 115° C. or higher. The sink-in temperature is measured based on JIS K7196-1991 as a temperature measured when a pressure load sinks in from a sheet surface by 100 μm. The molding conditions are such that the thermoplastic elastomer composition is hot press molded at a temperature of 200° C. with a maximum pressure of 10 MPa for 5 min, and thereafter cold press molded at a temperature of 23° C. with a maximum pressure of 10 MPa for 5 min, so as to prepare the pressed sheet.

A multilayer film made from or containing at least one core layer made from or containing a polypropylene composition made from or containing: A) from 95 wt % to 60 wt %; of a propylene homopolymer having a fraction insoluble in xylene at 25° C. greater than 90 wt %, based upon the total weight of the propylene homopolymer; and B) from 5 wt % to 40 wt %; of an heterophasic propylene ethylene copolymer, the sum of the amounts of A) and B) being 100.

Provided is a method for producing a thermoplastic elastomer composition that can form a molded article having both good appearance and high stiffness. The method for producing a thermoplastic elastomer composition comprises the following first step and second step, wherein the produced thermoplastic elastomer composition contains 5 mass % or less of a mineral oil (C): first step: a step of melt-kneading polypropylene (A-1) and an ethylene-based copolymer rubber (B) in the presence of an organic peroxide, the polypropylene (A-1) being polypropylene of which 20° C. xylene insoluble fraction has an intrinsic viscosity [η.sub.cxis] of 0.1 dl/g or more and less than 1.5 dl/g; and second step: a step of further adding polypropylene (A-2) of which 20° C. xylene insoluble fraction has an intrinsic viscosity [η.sub.cxis] of 1.5 dl/g or more and 7 dl/g or less, and melt-kneading the resulting mixture.

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.

The invention relates to a film comprising at least one first layer consisting of a heterophasic propylene copolymer composition comprising a heterophasic propylene copolymer, wherein the heterophasic propylene copolymer is present in an amount of at least 95 wt % based on the heterophasic propylene copolymer composition, wherein the heterophasic propylene copolymer consists of a) a propylene-based matrix wherein the propylene-based matrix consists of a propylene homopolymer and b) a dispersed ethylene α-olefin copolymer, wherein the sum of the weight of the propylene-based matrix and the weight of the dispersed ethylene-α-olefin copolymer is 100 wt % based on the heterophasic propylene copolymer, wherein the amount of xylene-soluble matter (CXS) in the heterophasic propylene copolymer composition is in the range from 20.0 to 35.0 wt % based on the heterophasic propylene copolymer composition, wherein the CXS is measured according to ISO 16152:2005 in p-xylene at 25° C.

Provided are films made from polymer blends including post-consumer resin (PCR). The films are formed from a polymer blend that includes a PCR, a low density polyethylene and/or ethylene/carbon monoxide copolymer (ECO copolymer), and a modification agent. The films, which include a PCR, contribute to improved sustainability and in aspects maintain or minimize the reduction of desirable properties, such as elastic recovery.

A heat conduction sheet, includes at least one kind of graphite particle (A) selected from the group consisting of scale-like particles, ellipsoidal particles and rod-like particles; a polymer (B) having an isobutylene structure; an ethylene-propylene copolymer (C); and an ethylene octene elastomer (D), in which, in a case of scale-like particles, a plane direction of the particle is oriented in a thickness direction of the heat conduction sheet, and in a case of ellipsoidal particles or rod-like particles, a long axis direction of the particle is oriented in the thickness direction of the heat conduction sheet.