Re: glueing teflon
Doubt that it 'teflon' if it is 'glued'. Such 'low surface energy' polymers are very DIFFICULT to 'glue'.
Probably what you have is UHMWPE - ultra high molecular weight polyethylene ... but you need special acrylic based 'glues' now offered by 3M (ScotchWeld, etc.) ... that are specifically formulated for UHMWPE and other low surface energy plastics.