Methods and devices for mechanical separation of multilayer interlayers
US-2024217227-A1 · Jul 4, 2024 · US
Separation/recovery method for laminated film
US2021178744A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2021178744-A1 |
| Application number | US-201917270560-A |
| Country | US |
| Kind code | A1 |
| Filing date | Sep 12, 2019 |
| Priority date | Sep 25, 2018 |
| Publication date | Jun 17, 2021 |
| Grant date | — |
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 method for separating and recovering a layered film laminated and adhered with a reactive adhesive, the method including a step 1 of immersing the layered film in an alkaline solution while stirring the layered film with heating at 20° C. to 90° C. or ultrasonically vibrating the layered film and a step 2 of recovering separated single-layered films that constitute the respective layers of the layered film. The reactive adhesive is preferably a reactive adhesive containing a polyisocyanate composition and a polyol composition and more preferably a reactive adhesive containing a polyisocyanate composition, a polyol composition, and a compound having an acidic group.
First claim
Opening claim text (preview).
1 . A method for separating and recovering a layered film laminated and adhered with a reactive adhesive, the method comprising: a step 1 of immersing the layered film in an alkaline solution while stirring the layered film with heating at 20° C. to 90° C. or ultrasonically vibrating the layered film; and a step 2 of recovering separated single-layered films that constitute the respective layers of the layered film. 2 . The method for separating and recovering a layered film according to claim 1 , wherein the reactive adhesive is a reactive adhesive containing a polyisocyanate composition and a polyol composition. 3 . The method for separating and recovering a layered film according to claim 1 , wherein the reactive adhesive is a reactive adhesive containing a polyisocyanate composition, a polyol composition, and a compound having an acidic group. 4 . The method for separating and recovering a layered film according to claim 1 , wherein the layered film has a printing ink layer and/or a primer layer. 5 . The method for separating and recovering a layered film according to claim 1 , wherein the layered film has the reactive adhesive, an ink layer and/or a primer layer, and at least one layer of the reactive adhesive, the ink layer, and the primer layer contains a compound having an acidic group.
Assignees
Inventors
Classifications
Containers; Packaging elements or accessories, Packages (closures therefor B29L2031/56; ink or toner cartridges B29L2031/7678; squeeze tubes B29L2023/20; suitcases B29L2031/7418) · CPC title
Layered products · CPC title
Dissolving the materials in aqueous alkaline solutions, e.g. NaOH or KOH · CPC title
Separating plastics from other materials · CPC title
Plastics recycling; Rubber recycling · 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 US2021178744A1 cover?
- A method for separating and recovering a layered film laminated and adhered with a reactive adhesive, the method including a step 1 of immersing the layered film in an alkaline solution while stirring the layered film with heating at 20° C. to 90° C. or ultrasonically vibrating the layered film and a step 2 of recovering separated single-layered films that constitute the respective layers of th…
- Who is the assignee on this patent?
- Dainippon Ink & Chemicals
- What technology area does this patent fall under?
- Primary CPC classification B32B43/006. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Jun 17 2021 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).