US 12,420,223 B2
Composite non-woven fabric and article comprising same
Do Kyung Yoon, Gyeongsangbuk-do (KR); and Geum Sig Shin, Gyeongsangbuk-do (KR)
Assigned to Toray Advanced Materials Korea Inc., Gyeongsangbuk-do (KR)
Appl. No. 17/917,849
Filed by TORAY ADVANCED MATERIALS KOREA INC., Gyeongsangbuk-do (KR)
PCT Filed Mar. 22, 2021, PCT No. PCT/KR2021/003499
§ 371(c)(1), (2) Date Oct. 7, 2022,
PCT Pub. No. WO2021/206312, PCT Pub. Date Oct. 14, 2021.
Claims priority of application No. 10-2020-0043511 (KR), filed on Apr. 9, 2020; and application No. 10-2021-0030146 (KR), filed on Mar. 8, 2021.
Prior Publication US 2023/0158428 A1, May 25, 2023
Int. Cl. B01D 39/16 (2006.01); A62B 23/02 (2006.01); B32B 3/30 (2006.01); B32B 5/02 (2006.01); B32B 5/26 (2006.01); D04H 3/007 (2012.01); D04H 3/03 (2012.01); D04H 3/16 (2006.01)
CPC B01D 39/1623 (2013.01) [B32B 3/30 (2013.01); B32B 5/022 (2013.01); B32B 5/269 (2021.05); D04H 3/007 (2013.01); D04H 3/03 (2013.01); D04H 3/16 (2013.01); A62B 23/025 (2013.01); B01D 2239/0208 (2013.01); B01D 2239/0435 (2013.01); B01D 2239/0618 (2013.01); B01D 2239/0622 (2013.01); B01D 2239/0627 (2013.01); B01D 2239/0668 (2013.01); B01D 2239/1258 (2013.01); B32B 2250/20 (2013.01); B32B 2250/40 (2013.01); B32B 2262/0253 (2013.01); B32B 2307/724 (2013.01); B32B 2571/00 (2013.01); D10B 2321/022 (2013.01); D10B 2401/00 (2013.01); D10B 2505/04 (2013.01); D10B 2509/00 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A non-woven fabric composite in which two or more kinds of non-woven fabrics are manufactured in a continuous process and integrated with each other, comprising: an at least partially electrostatically treated meltblown non-woven fabric layer; and a spunbond non-woven fabric layer disposed on one or both sides thereof,
wherein the non-woven fabric comprises a first spunbond non-woven fabric layer, a meltblown non-woven fabric layer, and a second spunbond non-woven fabric layer, wherein the meltblown non-woven fabric layer is at least partially electrostatically treated,
wherein the non-woven fabric composite comprises the first spunbond non-woven fabric layer, the meltblown non-woven fabric layer, and the second spunbond non-woven fabric layer, in this order,
wherein an embossed ratio is 9% to 19%, an average area of one embossed pattern is 0.06 mm2 to 0.6 mm2, an average slenderness ratio of one embossed pattern is 1.0 to 2.5,
wherein a pressure loss is 5.0 mmH2O or less, and a size of a pilling mass after the Martindale abrasion test is less than 5 mm,
wherein the size of a pilling mass is defined as the height of a lumpshaped protrusion, such as a pill, rope, or spiderweb, measured from the upper surface of the nonwoven fabric using a ruler from the side, in a state in which no external pressure is applied to the nonwoven fabric, after the Martindale abrasion test is performed according to ASTM D496698 using a silicone rubber wheel as an abrasive agent, wherein the abrasion test is conducted until appearance deformation progresses through the stages of fuzzy filaments, pills, ropes, and spiderwebs, and the term ‘pilling mass’ collectively refers to the lumpshaped protrusions formed in the pill, rope, and spiderweb stages, excluding fuzzy filaments.