Hot melt adhesives and uses thereof
US-2024228837-A1 · Jul 11, 2024 · US
Ethylene-vinyl alcohol copolymer resin composition, ethylene-vinyl alcohol copolymer film formed therefrom, and multilayer structure containing the same
US2022403212A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2022403212-A1 |
| Application number | US-202217701173-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 surface roughness of the EVOH resin composition is the peak material volume (Vmp) between 0.0008 and 10 μm3/μm2. The EVOH of the invention can reduce the torque output during processing, and can obtain the EVOH film with excellent appearance.
First claim
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1 - 15 . (canceled) 16 . An ethylene-vinyl alcohol copolymer resin composition in the form of pellet, comprising an ethylene-vinyl alcohol copolymer resin, wherein the ethylene-vinyl alcohol copolymer resin composition has a surface with a peak material volume (Vmp) between 0.0008 and 10 μm 3 /μm 2 . 17 . The ethylene-vinyl alcohol copolymer resin composition of claim 16 , wherein the surface of the ethylene-vinyl alcohol copolymer resin composition has a core material volume (Vmc) ranging from 0.005 to 50 μm 3 /μm 2 . 18 . The ethylene-vinyl alcohol copolymer resin composition of claim 16 , wherein the surface of the ethylene-vinyl alcohol copolymer resin composition has a maximum peak height (Sp) ranging from 0.005 to 7 μm. 19 . The ethylene-vinyl alcohol copolymer resin composition of claim 16 , wherein the ethylene-vinyl alcohol copolymer resin has an ethylene content of 20-48 mole %. 20 . The ethylene-vinyl alcohol copolymer resin composition of claim 16 , wherein the ethylene-vinyl alcohol copolymer resin has a saponification degree greater than 99.5 mole %. 21 . The ethylene-vinyl alcohol copolymer resin composition of claim 16 , wherein the surface has a maximum line height (Rz) between 0.01 and 13 μm. 22 . The ethylene-vinyl alcohol copolymer resin composition of claim 21 , wherein the maximum line height (Rz) of the surface is between 0.01 and 9.9 μm. 23 . The ethylene-vinyl alcohol copolymer resin composition of claim 16 having a moisture content of less than 1 wt %. 24 . The ethylene-vinyl alcohol copolymer resin composition of claim 16 having a boron content between 5 and 550 ppm. 25 . The ethylene-vinyl alcohol copolymer resin composition of claim 16 having an alkali metal content ranging from 5 to 550 ppm. 26 . The ethylene-vinyl alcohol copolymer resin composition of claim 16 further including one or a combination of the group consisting of cinnamic acid, conjugated polyene, slip agent and alkaline earth metal. 27 . An ethylene-vinyl alcohol copolymer film formed from the ethylene-vinyl alcohol copolymer resin composition of claim 16 . 28 . A multilayer structure, comprising: (a) at least one layer formed from the ethylene-vinyl alcohol copolymer resin composition of claim 16 ; (b) at least one polymer layer; and (c) at least one adhesive layer. 29 . The multilayer structure of claim 28 , 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
Alkali metal · CPC title
comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} · CPC title
Metals · CPC title
comprising vinyl acetate or vinyl alcohol (co)polymers · CPC title
Polyvinyl alcohol {; Vinyl alcohol} · CPC title
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- What does patent US2022403212A1 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 surface roughness of the EVOH resin composition is the peak material volume (Vmp) between 0.0008 and 10 μm3/μm2. The EVOH of the invention can reduce the torque output during processing, and can obtain the EVOH film wit…
- Who is the assignee on this patent?
- Chang Chun Petrochemical Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification C09J7/29. 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).