XPost: uk.d-i-y   
   From: "@frank.net   
      
   On 12/4/2016 7:34 AM, Syd Rumpo wrote:   
   > On 04/12/2016 10:03, Martin Brown wrote:   
   >> Food processor plastic bowl seems to be polycarbonate and took a   
   >> sufficiently hard thump on the hard kitchen floor to put a vertical 4cm   
   >> crack in the outer case near to the handle. It will doubtless get worse   
   >> if not repaired. Any suggestions for a suitable thin glue for   
   >> polycarbonate that will wick into the crack and prevent it from running.   
   >>   
   >> Would it make sense to drill into the end of the crack for stress relief   
   >> or be more likely to make it worse?   
   >>   
   >> Ideal glue would be food safe (so epoxy which might work isn't ideal).   
   >>   
   >> ISTR that petrol or ether might be good solvents for polycarbonate but I   
   >> have a feeling they make it go brittle too which would be no use in a   
   >> food processor where the mechanical strength is important.   
   >>   
   >> Any suggestions for the best glue to use here?   
   >>   
   > Whatever glue you use, duct tape of some variety on the outside is good   
   > if there's enough 'flat' space around the crack.   
   >   
   > Cheers   
      
   Looking through thread, that is a good suggestion as area of crack will   
   probably remain the weakest of the part.  I've repaired cracks in   
   plastic areas where most stress occurs by gluing nylon screen over the   
   crack.   
      
   I'd use the solvent based glues for polycarbonate and not worry about   
   toxicity of any glue used as area is small and toxic materials are part   
   of the polymer.   
      
   If the crack can be slightly widened it will allow better contact with   
   glue or solvent, then resealed to complete gluing.   
      
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