Multi-layer container, method for producing same, and method for producing reclaimed polyester
US12338047B2 · kind B2 · utility
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17Claims
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Key dates
| Filing date | Aug 11, 2021 |
| Grant date | Jun 24, 2025 |
| Priority date | — |
| Expiry date | May 21, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/62
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Provided is a multilayer container having a polyester layer containing a polyester resin (X), and a polyamide layer containing a polyamide resin (Y) and a yellowing inhibitor (A). The content of the polyamide resin (Y) is from 0.05 to 7.0 mass % relative to the total amount of all polyamide layers and all polyester layers. The yellowing inhibitor (A) is a dye. The content of the yellowing inhibitor (A) is from 400 to 800 ppm relative to the polyamide layer. An L* of the multilayer container is 87.5 or greater.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.