PL432316A1 - Method of manufacturing recycled polyester packaging with improved thermal resistance intended for food contact - Google Patents
Method of manufacturing recycled polyester packaging with improved thermal resistance intended for food contactInfo
- Publication number
- PL432316A1 PL432316A1 PL432316A PL43231619A PL432316A1 PL 432316 A1 PL432316 A1 PL 432316A1 PL 432316 A PL432316 A PL 432316A PL 43231619 A PL43231619 A PL 43231619A PL 432316 A1 PL432316 A1 PL 432316A1
- Authority
- PL
- Poland
- Prior art keywords
- temperature
- film
- main
- heated
- directed
- Prior art date
Links
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging
Landscapes
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Przedmiotem zgłoszenia jest sposób wytwarzania poliestrowych opakowań z recyklatów o podwyższonej odporności termicznej przeznaczonych do kontaktu z żywnością, który polega na tym, że recyklat poli(tereftalanu etylenu) PET w stanie stałym podgrzewa się w przepływie gorącego powietrza do temperatury 160°C do 210°C pod obniżonym ciśnieniem i/lub w przepływie gazu obojętnego, po czym produkt reakcji polikondensacji w stanie stałym połączonej z dekontaminacją chłodzi się do temperatury poniżej 100°C i kieruje do głównej wytłaczarki jedno- lub dwuślimakowej i prowadzi wytłaczanie folii w procesie ciągłym z zastosowaniem urządzenia wyposażonego w jedną główną wytłaczarkę i ewentualnie wytłaczarki dodatkowe, przy czym ewentualnie w bloku współwytłaczającym łączy się strumienie stopionego tworzywa pochodzące z wytłaczarki głównej i ewentualnie wytłaczarek dodatkowych w jeden uzyskując układ jednowarstwowy zawierający 100% recyklatu lub wielowarstwowy, przy czym ilość recyklatu w folii wielowarstwowej jest większa niż 50%. W drugim etapie schłodzona folia kierowana jest na termoformierkę i w pierwszej kolejności podgrzewana jest w stacji ogrzewania wstępnego do temperatury 50°C, a następnie w stacji ogrzewania zasadniczego jedną bądź dwoma płytami grzewczymi do temperatury powierzchni arkusza w zakresie od 70°C do 140°C po czym folia formowana jest w gnieździe formy i utrzymywana w temperaturze od 120°C do 220°C, a uformowane opakowanie kierowane jest do gniazda chłodzącego do czasu wychłodzenia do temperatury poniżej temperatury zeszklenia, cały cykl formowania trwa od 2s do 15s, lub folia w pierwszej kolejności podgrzewana jest w stacji ogrzewania wstępnego do temperatury 50°C, a następnie w stacji ogrzewania zasadniczego jedną bądź dwoma płytami grzewczymi do temperatury powierzchni arkusza w zakresie od 140°C do 220°C po czym folia formowana jest w gnieździe formy i utrzymywana w temperaturze od 20°C do 120°C, cały cykl formowania trwa od 2s do 15s, i finalnie uformowane opakowanie jest wycinane.The subject of the application is a method of producing polyester packaging from recyclates with increased thermal resistance intended for contact with food, which consists in the fact that poly (ethylene terephthalate) PET recyclate in a solid state is heated in the flow of hot air to a temperature of 160 ° C to 210 ° C under reduced pressure and / or inert gas flow, whereafter the solid-state polycondensation reaction product combined with decontamination is cooled to a temperature below 100 ° C and directed to the main single or twin screw extruder and the film is extruded in a continuous process using a device equipped with into one main extruder and possibly additional extruders, where possibly in the co-extrusion block the streams of molten material from the main extruder and optionally additional extruders are combined into one, resulting in a single-layer system containing 100% of recyclate or a multi-layer system, the amount of stamina is greater than 50%. In the second stage, the cooled foil is directed to a thermoformer and first heated in the preheating station to a temperature of 50 ° C, and then in the main heating station with one or two heating plates to the sheet surface temperature in the range from 70 ° C to 140 ° C. where the film is formed in the mold cavity and kept at a temperature of 120 ° C to 220 ° C, and the formed packaging is directed to a cooling slot until it cools down to a temperature below the glass transition temperature, the entire forming cycle lasts from 2s to 15s, or the film in the first sequence is heated in the pre-heating station to a temperature of 50 ° C, and then in the main heating station with one or two heating plates to the sheet surface temperature in the range of 140 ° C to 220 ° C, then the film is formed in the mold cavity and kept at the temperature from 20 ° C to 120 ° C, the entire forming cycle lasts from 2s to 15s, and the finally formed package is cut out.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL432316A PL244013B1 (en) | 2019-12-20 | 2019-12-20 | Method of manufacturing recycled polyester packaging with improved thermal resistance intended for food contact |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL432316A PL244013B1 (en) | 2019-12-20 | 2019-12-20 | Method of manufacturing recycled polyester packaging with improved thermal resistance intended for food contact |
Publications (2)
Publication Number | Publication Date |
---|---|
PL432316A1 true PL432316A1 (en) | 2021-06-28 |
PL244013B1 PL244013B1 (en) | 2023-11-20 |
Family
ID=76547959
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PL432316A PL244013B1 (en) | 2019-12-20 | 2019-12-20 | Method of manufacturing recycled polyester packaging with improved thermal resistance intended for food contact |
Country Status (1)
Country | Link |
---|---|
PL (1) | PL244013B1 (en) |
-
2019
- 2019-12-20 PL PL432316A patent/PL244013B1/en unknown
Also Published As
Publication number | Publication date |
---|---|
PL244013B1 (en) | 2023-11-20 |
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