Abstract: A process for producing a rubber composition, which comprises the step of kneading at least (A) 100 parts by weight of a pellet containing an ethylene-?-olefin-non-conjugated diene copolymer rubber, the pellet having a covering layer comprising a thermoplastic resin, (B) 10 to 200 parts by weight of a reinforcing material, and (C) 1 to 200 parts by weight of a softener; and a process for producing a vulcanized (further foamed) molded article of the rubber composition.

Abstract: A non-mutually-adhesive pellet, process for producing non-mutually-adhesive pellet, and process for producing rubber molding are provided. The non-mutually-adhesive pellet comprises a core containing a rubber composition comprising a rubber, reinforcement and softener and a coating layer which contains a thermoplastic polymer and with which the core is coated, wherein the thermoplastic polymer has the crystal melting peak temperature as measured by a DSC measuring method including the specified procedures and the Vicat softening temperature as measured in accordance with JIS K7206 at a load of 10 N and a heating rate of 50° C./h is over 40° C.

Abstract: A process for producing a rubber composition, which comprises the step of kneading at least (A) 100 parts by weight of a pellet containing an ethylene-?-olefin-non-conjugated diene copolymer rubber, the pellet having a covering layer comprising a thermoplastic resin, (B) 10 to 200 parts by weight of a reinforcing material, and (C) 1 to 200 parts by weight of a softener; and a process for producing a vulcanized (further foamed) molded article of the rubber composition.

Abstract: On a folding section of the thermoplastic sheet there is provided one or more thin-walled section, extending in a longitudinal direction of the folding section, whose minimum thickness is not less than 1/10 and not more than ? the thickness of the thermoplastic resin sheet. Thus, it is possible to provide a box in which rebound of the folding section is reduced and an operation efficiency upon setting up the box and putting goods into the box can be improved.

Abstract: On a folding section of the thermoplastic sheet there is provided one or more thin-walled section, extending in a longitudinal direction of the folding section, whose minimum thickness is not less than {fraction (1/10)} and not more than ⅔ the thickness of the thermoplastic resin sheet. Thus, it is possible to provide a box in which rebound of the folding section is reduced and an operation efficiency upon setting up the box and putting goods into the box can be improved.

Abstract: The present invention provides a foamed sheet showing small dimensional changes resulted with temperature changes, etc., said foamed sheet which made of a thermoplastic resin material, wherein the coefficient of linear expansion of the thermoplastic resin material &agr; (/°C.) and the coefficient of linear expansion of the foamed sheet &agr;f (/°C.