Roll material for manufacturing electromagnetic induction sealing liner and sealing liner
US-2024424770-A1 · Dec 26, 2024 · US
Plexifilamentary sheets
US10920028B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10920028-B2 |
| Application number | US-201514740824-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 16, 2015 |
| Priority date | Jun 18, 2014 |
| Publication date | Feb 16, 2021 |
| Grant date | Feb 16, 2021 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A sheet having a plexifilamentary structure with a normalized Frazier air permeability of between 0.002 and 0.2 (m 3 /m 2 ·minute)@50 gsm, and a normalized hydrohead of between 150 and 250 centimeters@50 gsm.
First claim
Opening claim text (preview).
We claim: 1. A sheet comprising a plexifilamentary film-fibril network consisting of high density polyethylene in an overlapping multi-directional configuration, the sheet, as-produced from a spin cell, having a normalized Frazier air permeability of between 0.002 and 0.2 m 3 /m 2 ·minute at 50 gsm, a BET surface area of between 9 and 20 m 2 /gm, and a normalized hydrohead of between 150 and 250 cm at 50 gsm wherein the plexifilamentary film-fibril network in an overlapping multi-directional configuration is flash-spun from a spin fluid comprising polymer and spin agent, the spin fluid temperature being 190° C. to 195° C., the spin agent consisting of dichloromethane and 2,3-dihydrodecafluoropentane, and the polymer concentration in the spin fluid being 12 to 14 weight percent. 2. The sheet of claim 1 wherein the sheet as-produced from the spin cell has a normalized Frazier air permeability of less than or equal to 0.09 m 3 /m 2 ·minute at 50 gsm. 3. The sheet of claim 1 wherein the sheet as-produced from the spin cell has a Frazier air permeability of greater than or equal to 0.0075 m 3 /m 2 ·minute at 50 gsm. 4. The sheet of claim 1 wherein the sheet as-produced from the spin cell has a normalized hydrohead of between 165 and 208 centimeters at 50 gsm. 5. The sheet of claim 1 wherein the sheet as-produced from the spin cell has a basis weight of greater than or equal to 30 grams per square meter. 6. A multilayer structure comprising a multiplicity of two or more sheets wherein at least one sheet is a sheet according to claim 1 . 7. A thermally consolidated sheet made from sheet according to claim 1 . 8. A multilayer structure comprising a multiplicity of two or more sheets wherein at least one sheet is a sheet according to claim 7 .
Assignees
Inventors
Classifications
- B32B27/32Primary
comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} · CPC title
Non-permeable · CPC title
with bonds between thermoplastic yarns or filaments produced by welding · CPC title
from polyolefins · CPC title
- C08J5/18Primary
Manufacture of films or sheets · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US10920028B2 cover?
- A sheet having a plexifilamentary structure with a normalized Frazier air permeability of between 0.002 and 0.2 (m 3 /m 2 ·minute)@50 gsm, and a normalized hydrohead of between 150 and 250 centimeters@50 gsm.
- Who is the assignee on this patent?
- Dupont Safety & Construction Inc
- What technology area does this patent fall under?
- Primary CPC classification B32B27/32. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Feb 16 2021 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).