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US 11,885,044 B2Granted
Method for producing polypropylene nonwoven fabric
AssigneeLG Chem, Ltd.
InventorsKyung Seop Noh, Seong Min Chae, Churl Young Park, Sangjin Jeon, Taejin Kim
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Abstract
The polypropylene nonwoven fabric produced by the method for producing a polypropylene nonwoven fabric according to the present invention has features that it has excellent stretchability and excellent water pressure resistance.
Claims15
A method for producing a polypropylene nonwoven fabric comprising the steps of:
- step 1:
- spinning a metallocene polypropylene resin to produce filaments;
- step 2:
- cooling the spun filaments at a temperature of 10 to 20° C.;
- and
- step 3:
- bonding the cooled filaments together at 150 to 165° C. to form a nonwoven fabric,
- wherein the metallocene polypropylene resin has:
- a weight average molecular weight of 100,000 to 150,000,
- a molecular weight distribution (PDI) of 2.0 to 2.5,
- a melt index (MI) of 20 to 28 g/10 min measured at 230° C. under a load of 2.16 kg according to ASTM D1238,
- a melting point of 150 to 155° C., and
- a xylene soluble (XS) content of 2% by weight or less.
10 more elements
Dependencies are inferred from the claim text.