METHOD FOR STABILIZING POLYMER FOR LONG TERM, METHOD FOR PRODUCING NONWOVEN FABRIC, AND METHOD FOR PRODUCING ELASTOMER COMPOSITION

• Main Authors: URUSHIHARA, TSUYOSHI, KAWAMOTO, NAOSHI, OKAMOTO, KOHEI, SEGUCHI, TETSUYA
• Format: Patent
• Language: English; French; German
• Published: 05.10.2016
• Subjects: BRAIDING; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; COTTON-WOOL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS; KNITTING; LACE-MAKING; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL; METALLURGY; NON-WOVEN FABRICS; ORGANIC MACROMOLECULAR COMPOUNDS; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRIMMINGS; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WADDING

The present invention provides a method of producing a nonwoven fabric, which is capable of producing a nonwoven fabric showing limited elution of its additives into a solvent. More specifically, the present invention provides a method of producing a nonwoven fabric from at least one polyolefin, which is characterized by using a polyolefin obtained by polymerization of a monomer having an ethylenically unsaturated bond with an addition of 0.001 to 0.03 parts by mass of a phenolic antioxidant represented by the following Formula (1), which is masked with an organoaluminum, and 0.001 to 0.04 parts by mass of a phosphorus-based antioxidant with respect to 100 parts by mass of the monomer having an ethylenically unsaturated bond, the addition being made to a catalyst system, a polymerization system or a piping before or during the polymerization of the monomer.