US 12,390,751 B2
Nonwoven fabric for cabin air filter comprising low melting point polyester fiber
Hyun Wook Shin, Daejeon (KR); Min Sung Lee, Daejeon (KR); Jae Min Choi, Daejeon (KR); and Sung Yeol Kim, Sejong-si (KR)
Assigned to HUVIS CORPORATION, Seoul (KR)
Filed by HUVIS CORPORATION, Seoul (KR)
Filed on Sep. 28, 2020, as Appl. No. 17/034,381.
Claims priority of application No. 10-2019-0128562 (KR), filed on Oct. 16, 2019.
Prior Publication US 2021/0113947 A1, Apr. 22, 2021
Int. Cl. B01D 39/00 (2006.01); B01D 39/16 (2006.01)
CPC B01D 39/1623 (2013.01) [B01D 2239/0618 (2013.01); B01D 2239/10 (2013.01); B01D 2325/04 (2013.01); B01D 2325/32 (2013.01)] 3 Claims
 
1. A nonwoven fabric for cabin air filter comprising
a first polyester fiber comprising a polyester resin having a melting point higher than 250° C., and
a second polyester fiber comprising a low melting point polyester resin having a softening point of 100 to 150° C.,
wherein the first polyester fiber is a modified cross-sectional yarn having multiple leaves capturing items, the first polyester fiber having a roundness of 50 to 80%, and
the second polyester fiber is a polyester composite fiber formed of a sheath part and a core part,
wherein the core part is formed from a polyester resin, and
the sheath part is formed from the low melting point polyester resin which is formed from an acid component selected from a group consisting of terephthalic acid or ester-forming derivatives thereof, and a diol component comprising a first component and a second component, wherein the first component is selected from the group consisting of 2-methyl-1,3-propanediol and ethylene glycol, and the second component is 2-methyl-1,3-pentanediol in a content of 0.5 to 2 mol % in the diol component,
the second polyester fiber comprises illite particles or a mixture of the illite particles and sericite particles, and a silver-based inorganic antibacterial agent particles and the low melting point polyester resin has a melt viscosity at 260° C. of 700 to 1,500 poise, and
the second polyester fiber comprises 0.3 to 3 wt % of the illite particles, or the mixture of the illite particles and sericite particles with respect to weight of the second polyester fiber, and the second polyester fiber comprise 5 to 30 wt % of the silver-based inorganic antibacterial agent particles with respect to weight of the illite particles or the mixture of the illite particles and sericite particles.