Abstract: The present invention relates to a polymer composition comprising 100 parts by weight of an olefin-based polymer, and 0.01 to 100 parts by weight of a branched fatty acid and 0.01 to 200 parts by weight of a releasable active compound per 100 parts by weight of said olefin-based polymer.

Abstract: The present invention relates to a polymer composition comprising 100 parts by weight of an olefin-based polymer, and 0.01 to 100 parts by weight of a branched fatty acid and 0.01 to 200 parts by weight of a releasable active compound per 100 parts by weight of said olefin-based polymer.

Abstract: A resin composition for pressure-foam molding, which comprises an ethylene-based copolymer and a foaming agent, wherein the ethylene-based copolymer has monomer units derived from ethylene and monomer units derived from an a-olefin having 3 to 20 carbon atoms, has a melt flow rate of 0.01 to 0.7 g/10 minutes, a molecular weight distribution of 5 or more determined by a gel permeation chromatography, an activation energy of flow of 40 kJ/mol or more, and inflection points of 3 or less on a melting curve within temperature range from 25° C. to the end point of melting obtained by a differential scanning calorimetry; a foam obtained by press foaming; and a process for producing the foam.

Abstract: A resin composition for pressure-foam molding, which comprises an ethylene-based copolymer and a foaming agent, wherein the ethylene-based copolymer has monomer units derived from ethylene and monomer units derived from an a-olefin having 3 to 20 carbon atoms, has a melt flow rate of 0.01 to 0.7 g/10 minutes, a molecular weight distribution of 5 or more determined by a gel permeation chromatography, an activation energy of flow of 40 kJ/mol or more, and inflection points of 3 or less on a melting curve within temperature range from 25° C. to the end point of melting obtained by a differential scanning calorimetry; a foam obtained by press foaming; and a process for producing the foam.

Abstract: A copolymer having monomer units derived from ethylene and monomer units derived from an ?-olefin of 3 to 20 carbon atoms, a density of 906 to 970 kg/m3 and an activation energy of flow of 50 kJ/mol or more, and satisfying specific relations among a melt complex viscosity, a melt flow rate and a characteristic relaxation time.

Abstract: An ethylene-?-olefin copolymer having monomer units derived from ethylene and monomer units derived from an ?-olefin of 3 to 20 carbon atoms, a density of 906 to 970 kg/m3, an activation energy of flow of 50 kJ/mol or more and a heat quantity of fusion of a cold xylene soluble part of 30 J/g or more, and satisfying specific relations among a rate of the cold xylene soluble part in the copolymer, the density, a melt flow rate and a characteristic relaxation time.

Abstract: A resin composition wherein the content of the following component (i) is 99 to 30 wt % and the content of the following component (ii) is 1 to 70 wt %, a pressurized foaming molded body of the resin composition, and a laminate obtained by laminating a layer composed of the pressure-foamed molding and a layer composed of another material: (i) an ethylene-a-olefin-based copolymer comprising an ethylene monomer unit and an a-olefin monomer unit having 3 to 20 carbon atoms wherein the melt flow rate is 0.01 to 5 g/10 minutes and the activation energy for flow is 30 kJ/mol or more, (ii) an ethylene-unsaturated ester-based copolymer comprising an unsaturated ester monomer unit and an ethylene monomer unit.

Abstract: A copolymer having monomer units derived from ethylene and monomer units derived from an ?-olefin of 3 to 20 carbon atoms, a density of 906 to 970 kg/m3 and an activation energy of flow of 50 kJ/mol or more, and satisfying specific relations among a melt complex viscosity, a melt flow rate and a characteristic relaxation time.

Abstract: An ethylene-?-olefin copolymer having monomer units derived from ethylene and monomer units derived from an ?-olefin of 3 to 20 carbon atoms, a density of 906 to 970 kg/m3, an activation energy of flow of 50 kJ/mol or more and a heat quantity of fusion of a cold xylene soluble part of 30 J/g or more, and satisfying specific relations among a rate of the cold xylene soluble part in the copolymer, the density, a melt flow rate and a characteristic relaxation time.

Abstract: The invention provides, as a method for producing a multi-layer foamed sheet whose scale-like appearance has been improved by means of a multi-layer circular die coextrusion method, a method for producing a multi-layer foamed sheet having foam layers and non-foam layers by a multi-layer circular die coextrusion method which is a method for producing a multi-layer foamed sheet wherein the shear stress at the interface of each layer is 5000 Pa or higher and not higher than 50000 Pa, a method for producing a multi-layer foamed sheet wherein the resin of said non-foam layer is a linear propylenic resin having a melt flow rate of 5 to 30 g/10 minutes, and a method for producing a multi-layer foamed sheet wherein the resin of said foam layer is a propylenic resin whose melt tension (MT) at 190° C. and melt flow rate (MFR) at 230° C. satisfy the following equation A: MT?7.52×MFR (?0.

Abstract: A foamed thermoplastic resin sheet has a foaming ratio of not less than 2.5, and cells, existing in an interior part which extends inward from a depth of 20 percent a whole thickness of the sheet from the front and rear surfaces thereof respectively in a thickness direction thereof and from 15 percent a width of the sheet from both side edges respectively, satisfy the following expressions (1) and (2): 0.5≦D/C≦0.9  (1) 0.5≦E/C≦0.9  (2) where C represents a mean cell diameter in the thickness direction of the foamed thermoplastic resin sheet, D represents a mean cell diameter in an extrusion direction (MD) of the same, and E represents a mean cell diameter in the width direction (TD) of the same. The foamed thermoplastic resin sheet thus arranged has a high foaming ratio, and is formed thick.

Abstract: An indicator comprising a porous resin material, and a liquid retained in the pores of the porous resin material, in which the whiteness of the porous resin material is at least 80, and the whiteness of the porous resin material is at least 20 larger than that of the indicator. This indicator displays information such as a period through the change of a color tone, and the like, well maintains the displaying properties, and suffers from less variation of displayed periods.

Abstract: A foamed thermoplastic resin sheet manufacturing device is provided with (i) an extruder for melting and kneading a thermoplastic resin and a foaming agent to form a melted/kneaded mixture and extruding the melted/kneaded mixture, (ii) a die which is provided at a front end of said extruder and forms the melted/kneaded mixture into a sheet-like foamy thermoplastic resin material, (iii) a vacuum chamber in which the foamy thermoplastic resin material extruded through said die expands under a reduced pressure, and (iv) a facing-wall section composed of a pair of walls of said vacuum chamber which face each other in a thickness direction of the foamy thermoplastic resin material, at least one of the walls in pair being a movable wall provided so as to move in directions in which said walls approach and separate each other. By this arrangement, foamed thermoplastic resin sheets with various thicknesses can be produced.

Abstract: Ethylene polymer for cast film processing at about 210 to 350° C. having a slip velocity at metal wall of not less than about 30 mm/sec, wherein polymer is obtained by polymerization using a metallocene catalyst; a resin composition for cast film processing at about 210 to 350° C.

Abstract: The invention provides, as a method for producing a multi-layer foamed sheet whose scale-like appearance has been improved by means of a multi-layer circular die coextrusion method, a method for producing a multi-layer foamed sheet having foam layers and non-foam layers by a multi-layer circular die coextrusion method which is a method for producing a multi-layer foamed sheet wherein the shear stress at the interface of each layer is 5000 Pa or higher and not higher than 50000 Pa, a method for producing a multi-layer foamed sheet wherein the resin of said non-foam layer is a linear propylenic resin having a melt flow rate of 5 to 30 g/10 minutes, and a method for producing a multi-layer foamed sheet wherein the resin of said foam layer is a propylenic resin whose melt tension (MT) at 190° C. and melt flow rate (MFR) at 230° C.

Abstract: The object of this invention is to provide a blown film which even if it is thin, is strong, feels firm and has high transparency and this invention provides a blown film comprising a multi-layer film of 3 or more layers comprising surface layers made of linear low-density polyethylene 1 satisfying the following requirements (A) to (C) and middle layers, wherein at least one of the middle layers is a layer comprising a resin composition comprising low-density polyethylene and linear low-density polyethylene 2 having a crystallization temperature higher by at least 2° C. than the crystallization temperature of the linear low-density polyethylene 1, as well as a blown film having a haze value of 7% or less, a tear strength of at least 110 kN/m in the MD direction, and a 1% secant modulus (1% SM) of at least 190 MPa.

Abstract: A foamed thermoplastic resin sheet manufacturing device is provided with (i) an extruder for melting and kneading a thermoplastic resin and a foaming agent to form a melted/kneaded mixture and extruding the melted/kneaded mixture, (ii) a die which is provided at a front end of said extruder and forms the melted/kneaded mixture into a sheet-like foamy thermoplastic resin material, (iii) a vacuum chamber in which the foamy thermoplastic resin material extruded through said die expands under a reduced pressure, and (iv) a facing-wall section composed of a pair of walls of said vacuum chamber which face each other in a thickness direction of the foamy thermoplastic resin material, at least one of the walls in pair being a movable wall provided so as to move in directions in which said walls approach and separate each other. By this arrangement, foamed thermoplastic resin sheets with various thicknesses can be produced.

Abstract: The present invention relates to a method for producing a foamed article by which a foamed article having a high expansion ratio, having uniform fine cells in a high closed cell ratio and capable of being recycled, which is utilizable as heat insulating materials for construction, cushioning materials for wrapping, cushioning floats for ships, floats for sports and leisure and the like, can be obtained readily and safely using a clean inorganic gas as a foaming agent, and to a foamed article obtained by the method.

Abstract: The present invention relates to a method for producing a foamed article by which a foamed article having a high expansion ratio, having uniform fine cells in a high closed cell ratio and capable of being recycled, which is utilizable as heat insulating materials for construction, cushioning materials for wrapping, cushioning floats for ships, floats for sports and leisure and the like, can be obtained readily and safely using a clean inorganic gas as a foaming agent, and to a foamed article obtained by the method. That is, the present invention provides a method for producing a foamed resin article comprising a melting step of feeding a thermoplastic resin into an extruder and heating it to melt, a kneading step of mixing an inorganic gas with the thermoplastic resin in the extruder to produce a kneaded material, and a foaming step of discharging the kneaded material from a mold having a tubular channel mounted to the end of the extruder to form the foamed article.

Abstract: The present invention provides a process for producing uncrosslinked polypropylene-based resin foam sheets which is characterized by using an extrusion foaming apparatus having a gear pump which is interposed between the extruder and the die and which is linked by means of adapters, wherein the pressure (Pg) at the inlet of the gear pump is within the range specified by the following formula (Formula 1) and the extruder is controlled so that the value of Pg is constant. Formula 1 Pc≦Pg(atm)≦Pc+90 Pc=(&khgr;−1)/H &khgr;: theoretical expansion ratio when the foaming agent added is 100% held H: coefficient of solubility of the foaming gas in the resin at the resin temperature in the gear pump inlet (cm3(STP)/cm3·atm) and the like.