Manufacturing method of spunbonded nonwoven fabric, spunbonded nonwoven fabric, and use thereof

Abstract

To provide a manufacturing method of a biodegradable spunbonded nonwoven fabric having excellent productivity and high strength.SOLUTION: The invention relates to a manufacturing method for obtaining a spunbonded nonwoven fabric from a raw material composition containing a poly (3-hydroxyalkanoate)-based resin. The manufacturing method includes: a step (A) of obtaining a raw yarn by discharging a heated and molten material of the raw material composition from a spinneret; and a step (B) of obtaining a web obtained by webbing the raw yarn. A melt mass flow rate of the raw material composition at 165°C is from 20 g / 10 min or higher to 150 g / 10 min. A weight average molecular weight (provided that the weight average molecular weight represents a weight average molecular weight of the raw material composition in terms of a polystyrene by gel permeation chromatography method using a chloroform solvent, the same shall apply thereinafter) is 100,000 or more and 300,000 or less.SELECTED DRAWING: Figure 1

Images