Composition For Preparing A Polymeric Foam
US-2015376361-A1 · Dec 31, 2015 · US
Multiporous hollow-fiber membrane and process for producing multiporous hollow-fiber membrane
US10023709B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10023709-B2 |
| Application number | US-201414776943-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 18, 2014 |
| Priority date | Mar 21, 2013 |
| Publication date | Jul 17, 2018 |
| Grant date | Jul 17, 2018 |
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- Title
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Abstract
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The present invention relates to a multiporous hollow-fiber membrane containing a thermoplastic resin, in which an aspect ratio of outer surface pores is 10 or more, an aspect ratio of inner surface pores is 1 to 5, and a thickness of a polymer backbone forming the outer surface pores is 1 μm to 20 μm.
First claim
Opening claim text (preview).
The invention claimed is: 1. A multiporous hollow-fiber membrane, comprising a thermoplastic resin, wherein an aspect ratio of outer surface pores is 10 or more, an aspect ratio of inner surface pores is 1 to 5, and a thickness of a polymer backbone forming the outer surface pores is 1 μm to 20 μm. 2. The multiporous hollow-fiber membrane according to claim 1 , wherein pure water permeability is 9000 L/m 2 /hr or more and compression resistance strength is 0.8 MPa or more. 3. A multiporous multilayered hollow-fiber membrane comprising one or more separation layers formed on an outer surface of the multiporous hollow-fiber membrane according to claim 1 . 4. A process for producing a multiporous hollow-fiber membrane, comprising: molding a hollow-fiber-shaped melt-kneaded product by allowing a melt-kneaded product containing a thermoplastic resin, an organic liquid, and an inorganic fine powder having an average primary particle size of 20 nm to 100 nm to pass through a filter having a pore size of 30 μm to 500 μm and then to discharge from a nozzle plate having a ring-shaped discharge port; and producing a multiporous hollow-fiber membrane by cool solidifying the hollow-fiber-shaped melt-kneaded product and removing, by extraction, the organic liquid and the inorganic fine powder. 5. The process for producing a multiporous hollow-fiber membrane according to claim 4 , wherein the inorganic fine powder is silica. 6. A multiporous multilayered hollow-fiber membrane comprising one or more separation layers formed on an outer surface of the multiporous hollow-fiber membrane according to claim 2 .
Assignees
Inventors
Classifications
Non-woven fabric · CPC title
Cleaning articles, e.g. mops or wipes · CPC title
Yield strength; Tensile strength · CPC title
Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives · CPC title
- C08J9/0023Primary
containing oxygen · CPC title
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- What does patent US10023709B2 cover?
- The present invention relates to a multiporous hollow-fiber membrane containing a thermoplastic resin, in which an aspect ratio of outer surface pores is 10 or more, an aspect ratio of inner surface pores is 1 to 5, and a thickness of a polymer backbone forming the outer surface pores is 1 μm to 20 μm.
- Who is the assignee on this patent?
- Asahi Kasei Chemicals Corp
- What technology area does this patent fall under?
- Primary CPC classification C08J9/0023. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jul 17 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).