Abstract: The composite elastic yarn may be made from a wide, stretchable textile fabric or stretchable knitted fabric. A composite elastic yarn is obtained by drawing an elastic yarn 11 at a first draft rate to prepare a precursor composite elastic yarn with an inelastic yarn 31 and further drawing the precursor composite elastic yarn at a second draft rate of a value smaller than that of the first draft rate to make a composite with the removable inelastic yarn 31; and stretchable textile fabric and stretchable knitted fabric fabricated using this composite elastic yarn.

Abstract: The invention is a composite yarn fabricated by double-twisting a S-twisted single yarn and a S-twisted single yarn in a Z-twisting mode in a ratio of from 100% to 300% of the count of twist of the S-twisted single yarns, or a textile fabric.

Abstract: This invention provides a composite elastic yarn from which may be made a wide, stretchable textile fabric or stretchable knitted fabric.

Abstract: A composite yarn and a method of manufacturing it are disclosed which makes it possible to produce a fine spun twisted union yarn (33) with natural grandrelle-like patterns. In particular, a manufacturing method of a fine spun twisted union yarn (33) is disclosed where the feed rate or feeding time of one of two fiber bundles (321, 322) is varied according to a 1/f fluctuation, and the one fiber bundle is spun and twisted with the other fiber bundle, thereby the one fiber bundle appears and disappears alternately on the periphery of the spun twisted union yarn (33.).

Abstract: A method for manufacturing a low density rubber foamed body is provided which comprises the steps of forming a sheet from a mixture of 100 parts by weight of natural rubber or a synthetic rubber, 10 to 80 parts by weight of a foaming agent, and 0.5 to 15% by weight of a crosslinking agent; enclosing said sheet within a mold and heating said mold under pressure from the exterior to thereby foam said sheet; forcibly cooling said mold; and releasing a foamed body from said mold. When 10 to 60 parts by weight of a thermoplastic synthetic resin are further added to the mixture, a rubber foamed body of still lower density and lower shrinking property is obtained.

Abstract: A process for regenerating a resin, comprises the steps of dissolving a waste resin in an organic solvent to provide a resin solution, mixing the resin solution with a liquid of normal temperature, the liquid being immiscible with the solvent, scarcely dissolving the resin, and having a specific gravity smaller than that of the solvent and larger than that of the resin, thereby separating the resin from a mixture of the resin solution and the liquid, and recovering the resin. The liquid may have a temperature higher than the boiling point of the solvent. In this case, the solvent evaporation takes place together with the resin separation. The evaporated solvent is cooled later for recovery of the solvent.

Abstract: A method for manufacturing a low density synthetic resin foamed body is disclosed which is characterized by the steps of filling a mixture of 100 parts by weight of an ethylene-vinyl acetate copolymer, 20-80 parts by weight of a foaming agent, and 1.0-5.0 parts by weight of a crosslinking agent in a mold, closing the mold with a lid, heating the mold to form a foamed body, cooling the foamed body as it is kept in the mold, and opening the lid of the mold.