Water soluble film, packets employing the film, and methods of making and using same
US-2016280869-A1 · Sep 29, 2016 · US
Ethylene-vinyl alcohol copolymer resin composition, ethylene-vinyl alcohol copolymer film formed therefrom, and multilayer structure containing the same
US2022403077A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2022403077-A1 |
| Application number | US-202217700964-A |
| Country | US |
| Kind code | A1 |
| Filing date | Mar 22, 2022 |
| Priority date | Jun 16, 2021 |
| Publication date | Dec 22, 2022 |
| Grant date | — |
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Abstract
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The present invention relates to an ethylene-vinyl alcohol copolymer (EVOH) resin composition, an EVOH film formed therefrom, and a multilayer structure containing the same. The core void volume (Vvc) of the surface of the EVOH resin composition is more than 0.010 μm 3 /μm 2 and less than 50 μm 3 /μm 2 ; or its surface pole height (Sxp) is more than 0.010 μm and less than 9.0 μm. The invention can reduce the torque output during processing, reduce the adsorption of fine powder on the surface caused by static electricity generated on the surface of the EVOH, and provide good film thickness uniformity.
First claim
Opening claim text (preview).
1 - 17 . (Cancelled) 18 . An ethylene-vinyl alcohol copolymer resin composition in a form of pellet, comprising an ethylene-vinyl alcohol copolymer resin; wherein the ethylene-vinyl alcohol copolymer resin composition has a surface with a core void volume (Vvc) greater than 0.010 μm 3 /μm 2 and less than 50 μm 3 /μm 2 , or a surface pole height (Sxp) more than 0.010 μm and less than 9.0 μm. 19 . The ethylene-vinyl alcohol copolymer resin composition of claim 18 having a moisture content of less than 1 wt %. 20 . The ethylene-vinyl alcohol copolymer resin composition of claim 18 , wherein the ethylene-vinyl alcohol copolymer resin has an ethylene content of 20-48 mole %. 21 . The ethylene-vinyl alcohol copolymer resin composition of claim 19 , wherein the ethylene-vinyl alcohol copolymer resin has an ethylene content of 20-48 mole %. 22 . The ethylene-vinyl alcohol copolymer resin composition of claim 18 , wherein the ethylene-vinyl alcohol copolymer resin has a saponification degree greater than 99.5 mole %. 23 . The ethylene-vinyl alcohol copolymer resin composition of claim 19 , wherein the ethylene-vinyl alcohol copolymer resin has a saponification degree greater than 99.5 mole %. 24 . The ethylene-vinyl alcohol copolymer resin composition of claim 18 having a surface with a maximum line height (Rz) between 0.01 and 9.9 μm. 25 . The ethylene-vinyl alcohol copolymer resin composition of claim 19 having a surface with a maximum line height (Rz) between 0.01 and 9.9 μm. 26 . The ethylene-vinyl alcohol copolymer resin composition of claim 18 having a surface electrostatic voltage of less than 6 kV. 27 . The ethylene-vinyl alcohol copolymer resin composition of claim 19 having a surface electrostatic voltage of less than 6 kV. 28 . The ethylene-vinyl alcohol copolymer resin composition of claim 18 comprising two or more ethylene-vinyl alcohol copolymers with different ethylene contents. 29 . The ethylene-vinyl alcohol copolymer resin composition of claim 19 comprising two or more ethylene-vinyl alcohol copolymers with different ethylene contents. 30 . An ethylene-vinyl alcohol copolymer film formed from the ethylene-vinyl alcohol copolymer resin composition of claim 18 . 31 . A multilayer structure, comprising: (a) at least one layer formed from the ethylene-vinyl alcohol copolymer resin composition of claim 18 ; (b) at least one polymer layer; and (c) at least one adhesive layer. 32 . The multilayer structure of claim 31 , wherein the polymer layer is selected from a group consisting of low density polyethylene layer, polyethylene grafted maleic anhydride layer, polypropylene layer and nylon layer, and the adhesive layer is a tie layer.
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Classifications
comprising vinyl acetate or vinyl alcohol (co)polymers · CPC title
comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} · CPC title
Manufacture of films or sheets · CPC title
Resin or rubber layer containing a blend of at least two different polymers · CPC title
of synthetic resin · CPC title
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- What does patent US2022403077A1 cover?
- The present invention relates to an ethylene-vinyl alcohol copolymer (EVOH) resin composition, an EVOH film formed therefrom, and a multilayer structure containing the same. The core void volume (Vvc) of the surface of the EVOH resin composition is more than 0.010 μm 3 /μm 2 and less than 50 μm 3 /μm 2 ; or its surface pole height (Sxp) is more than 0.010 μm and less than 9.0 μm. The invention…
- Who is the assignee on this patent?
- Chang Chun Petrochemical Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification C08F216/06. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Dec 22 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). 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).