Patent ID: 11913923
Assignee: LG CHEM, LTD.
Field: Measurement (Instruments)
Classification: CPC G  D | IPC G

Claim 0:
1. A method for producing a nonwoven fabric, comprising:
preparing a plastic resin in a dried pellet form,
measuring a molecular weight distribution of the prepared plastic resin;
deriving a peak molecular weight value from the molecular weight distribution of the prepared plastic resin;
deriving a molecular weight distribution value (Mw/Mn) from the molecular weight distribution of the prepared plastic resin; and
calculating a predicted stretching diameter of a nonwoven fabric produced by the prepared plastic resin through a melt-blown process by using Mathematical Formulas 1-2,

Polymer Characteristic Factor=a(MWD)b*(Mp)c  [Mathematical Formula 1]

in Mathematical Formula 1,
MWD is the molecular weight distribution value (Mw/Mn) of the prepared plastic resin,
Mp is the peak molecular weight value of the prepared plastic resin,
a is 0.01 to 0.02,
b is 0.8 to 1.0, and
c is 0.20 to 0.22,

Predicted Stretching Diameter=d*(Polymer Characteristic Factor)−e  [Mathematical Formula 2]

in Mathematical Formula 2,
d is 1.01 to 1.02, and
e is 0.005 to 0.007, and
producing a nonwoven fabric by melt-blowing the prepared plastic resin which has the predicted stretching diameter of about 0.35 mm or less.