[특허]Process for forming a high efficiency nanofiber filter

Process for forming a high efficiency nanofiber filter 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B01D-046/00 B29C-071/00 B01D-039/16
출원번호	US-0934401 (2013-07-03)
등록번호	US-9186608 (2015-11-17)
발명자 / 주소	Bahukudumbi, Pradipkumar Vogt, Kirkland W. Theobald, James R.
출원인 / 주소	Milliken & Company
대리인 / 주소	Brickey, Cheryl J.
인용정보	피인용 횟수 : 0 인용 특허 : 64

초록

A process for forming a high efficiency filter containing the steps of forming a non-woven layer having pores from a plurality thermoplastic fibers having a median diameter of less than about 2 micrometers, saturating the non-woven layer in a wetting liquid, and drying the wetted non-woven layer.

대표청구항 ▼

1. A process for forming a high efficiency filter comprising: forming a non-woven layer having pores from a plurality of thermoplastic fibers having a median diameter of less than about 2 micrometers, wherein the formed non-woven layer contains no electrostatic charge;saturating the non-woven layer in a wetting liquid, wherein the wetting liquid has a surface tension of less than the surface tension of the thermoplastic making up the thermoplastic nanofibers, wherein the wetting liquid completely wets the pores in the non-woven layer;drying the wetted non-woven layer forming a dried non-woven layer at room temperature such that size and shape of at least a portion of the pores change, wherein the dried non-woven layer has higher filtration efficiency than the formed non-woven layer, and wherein the dried non-woven layer contains no electrostatic charge. 2. The process of claim 1, wherein the thermoplastic fibers have a median diameter of less than about 1 micrometers. 3. The process of claim 1, wherein the thermoplastic fibers have a median diameter of less than about 100 nanometers. 4. The process of claim 1, wherein the thermoplastic fibers have a median diameter of less than about 70 nanometers. 5. The process of claim, wherein the formed non-woven layer further comprises a plurality of micron-sized fibers. 6. The process of claim 1, wherein the wetting liquid is selected from the group consisting of isopropanol, ethanol, methanol, DMF, alcohol/water mixtures, and mixtures thereof. 7. The process of claim 1, wherein the formed non-woven layer further comprises a plurality of binder fibers. 8. The process of claim 1, wherein the formed non-woven layer further comprises a plurality of fire resistant or fire retardant fibers. 9. The process of claim 1, wherein the forming the non-woven layer further comprises attaching a support substrate to at least one surface of the non-woven layer. 10. The process of claim 1, wherein the formed non-woven layer has a density of between about 5 and 200 g/m2. 11. The process of claim 1, wherein the drying of the wetted non-woven layer comprises drying the wetted non-woven layer in a horizontal orientation. 12. The process of claim 1, wherein the drying of the wetted non-woven layer comprises drying the wetted non-woven layer in a vertical orientation. 13. The process of claim 1, wherein the thermoplastic fibers comprise a polymer are selected from the group consisting of polypropylene, polyester, polybutylene terephthalate, and polyethylene. 14. The process of claim 1, wherein the dried non-woven layer has a filtration efficiency of greater than MERV 11. 15. The process of claim 1, wherein the dried non-woven layer has lower pressure drop efficiency than the formed non-woven layer. 16. The process of claim 1, wherein the process further comprises pleating the filter. 17. The process of claim 1, wherein the process further comprises placing the filter in a frame. 18. A high efficiency filter formed from the method of claim 1.

이 특허에 인용된 특허 (64)

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Zucker, Jerry, Melt blown battery separator.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Process for forming a high efficiency nanofiber filter 원문보기

초록

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Process for forming a high efficiency nanofiber filter 원문보기

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