Polyester staple yarn for wet non-woven fabric, wet non-woven fabric comprising same, and preparation method therefor
AssigneeToray Advanced Materials Korea Inc.
InventorHwi Dong LEE
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Abstract
The present invention relates to a polyester staple yarn for a wet non-woven fabric, and a wet non-woven fabric including the same, wherein the polyester staple yarn is manufactured by using a polymerization catalyst including a titanium-based compound. The polyester staple yarn is superb in terms of dispersibility due to the remarkably low defect formation thereof, and thus, the present invention can provide a wet non-woven fabric having excellent mechanical strength, and a manufacturing method therefor.
Claims12
A polyester staple yarn for a wet non-woven fabric, which has a fineness of 0.3 to 3.0 de and a dispersibility of 10 ppm or less as measured by Relationship Formula 1 below:
- Dispersibility
-
- (
- ppm
- )
- =
- Number
-
- of
-
- undispersed
-
- fibers
-
- (
- ca
- )
- Total
-
- number
-
- of
-
- fibers
-
- (
- ca
- )
- ×
- 10
- 6
- [
- Relationship
-
- Formula
-
- 1
- ]
- wherein in Relationship Formula 1 above, the number of undispersed fibers is determined by adding 3 g of a polyester staple yarn for a wet non-woven fabric having a moisture content of 25 wt. % to 1 L of water at a temperature of 25° C., stirring for 10 minutes under the condition of 600 rpm, leaving for 1 minute and then measuring the number of undispersed fibers.
A method for manufacturing a wet non-woven fabric, comprising:
- Step 1 of manufacturing a handsheet by mixing a polyester staple yarn for a wet non-woven fabric and a binder staple yarn;
- Step 2 of manufacturing a paper sheet by drying the handsheet;
- and
- Step 3 of manufacturing a wet non-woven fabric by performing calendaring by applying at least one selected from heat and pressure to the paper sheet,
- wherein the polyester staple yarn is manufactured by comprising:
- Step 1-1 of obtaining an ester reaction product by reacting an acid component and a diol component;
- Step 1-2 of preparing a polyester resin by mixing and reacting polymerization reactants including the ester reaction product, a heat stabilizer and a titanium-based compound;
- Step 1-3 of preparing a spinning material by spinning the polyester resin;
- and
- Step 1-4 of manufacturing a polyester staple yarn by stretching the spinning material.
Dependencies are inferred from the claim text.