Recycling of PTFE waste products

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F25797000%3A_____%2F24%3AN0000008" target="_blank" >RIV/25797000:_____/24:N0000008 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Recycling of PTFE waste products

Original language description

The result is a poster presented at the ICCT 2024 conference. Nowadays, general emphasis is placed on the recycling of metallic and non-metallic materials, which is an important step towards the sustainability of natural resources and environmental protection. Recycling makes it possible to reduce costs in the production of new products and reduce the environmental burden. Poly(tetrafluoroethylene) (PTFE) is a polymer with exceptional properties, due to which, in combination with fillers (e.g. glass fibers, bronze powder, graphite, etc.), it finds a unique position in the industry as a material for e.g. tribological components. It is conventionally processed by pressing, sintering and then machining to final dimensions. During production, a large amount of chips is produced, which end up in the waste, as well as possible scraps or products at the end of life. Recycling methods based on depolymerization or gamma ray irradiation are highly uneconomical and unfeasible for most companies. Since PTFE is very stable, the method of crushing and pulverizing into very small particles with dimensions close to the PTFE virgin material and their repeated use in production appears promising. To use this method, it is necessary to determine the optimal parameters of mechanical recycling, processing and verification of final properties. In this work, several grinding processes for PTFE-based waste products for recycling were tested. The particle size of the recycled material was verified using microscopy and the purity was verified using differential scanning calorimetry (DSC). The recycled material was mixed with the original virgin material in different ratios and the resulting mixtures were checked for homogeneity. In the end, a proposal for a technological procedure for the processing of mixtures, the so-called resintering, was carried out.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

20501 - Materials engineering

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů