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Waterproof and moisture-permeable composite material
US12434454B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12434454-B2 |
| Application number | US-202217877650-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 29, 2022 |
| Priority date | Aug 19, 2021 |
| Publication date | Oct 7, 2025 |
| Grant date | Oct 7, 2025 |
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Abstract
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A waterproof and moisture-permeable composite material is provided, which is composed of a waterproof and moisture-permeable membrane and a melt-blown non-woven fabric. The melting point of melt-blown non-woven fabric ranges from 80° C. to 130° C., in which the melt-blown non-woven fabric is a thermoplastic polymer which may be a thermoplastic polyether ester elastomer polymer. A method for forming a waterproof and moisture-permeable composite material includes: providing a thermoplastic polymer; performing a melt-blown process to the thermoplastic polymer by using an extruder to form a melt-blown fiber, so the melt-blown fiber on a conveyer belt with multiple meshes to form a melt-blown non-woven fabric; covering a moisture-permeable membrane on the melt-blown non-woven fabric to adhere the moisture-permeable membrane and the melt-blown non-woven fabric to form a waterproof and moisture-permeable composite material.
First claim
Opening claim text (preview).
What is claimed is: 1. A multilayer waterproof and moisture-permeable composite material, composed of a first melt-blown non-woven fabric, a waterproof and moisture-permeable membrane and a second melt-blown non-woven fabric, wherein the waterproof and moisture-permeable membrane is disposed between the first melt-blown non-woven fabric and the second melt-blown non-woven fabric; the first melt-blown non-woven fabric and the second melt-blown non-woven fabric are thermoplastic polymer; the thermoplastic polymer is TPEE polymer, and wherein a first average molecular weight (Mn) of the first melt-blown non-woven fabric ranges from 20,000 to 35,000, and a second average molecular weight (Mn) of the second melt-blown non-woven fabric ranges from 20,000 to 30,000. 2. The waterproof and moisture-permeable composite material of claim 1 , wherein the waterproof and moisture-permeable membrane is polytetrafluoroethylene (PTFE), olefin, polyester or thermoplastic polyurethanes (TPU) waterproof and moisture-permeable membrane. 3. A multilayer waterproof and moisture-permeable composite material, composed of a first melt-blown non-woven fabric, a waterproof and moisture-permeable membrane and a second melt-blown non-woven fabric, wherein the waterproof and moisture-permeable membrane is disposed between the first melt-blown non-woven fabric and the second melt-blown non-woven fabric; the first melt-blown non-woven fabric and the second melt-blown non-woven fabric are thermoplastic polymer; the thermoplastic polymer is TPEE polymer, wherein a first melting point of the first melt-blown non-woven fabric ranges from 80° C. to 130° C., and a first melting viscosity ranges from 500 (dPa·s) to 6,500 (dPa·s), a second melting point of the second melt-blown non-woven fabric ranges from 70° C. to 125° C., and a second melting viscosity ranges from 500 (dPa·s) to 5,500 (dPa·s).
Assignees
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Classifications
All layers being polymeric · CPC title
Permeability to liquids, absorption · CPC title
in the form of a non-woven mat · CPC title
Thermoplastic elastomer material · CPC title
Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA · CPC title
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- What does patent US12434454B2 cover?
- A waterproof and moisture-permeable composite material is provided, which is composed of a waterproof and moisture-permeable membrane and a melt-blown non-woven fabric. The melting point of melt-blown non-woven fabric ranges from 80° C. to 130° C., in which the melt-blown non-woven fabric is a thermoplastic polymer which may be a thermoplastic polyether ester elastomer polymer. A method for for…
- Who is the assignee on this patent?
- San Fang Chemical Ind Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification B32B5/022. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Oct 07 2025 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).