Flame resistant foamed article

A foamed article consisting of a polymer composition, wherein the foaming ratio of the foamed article is in the range from 105 to 120%, wherein the polymer composition comprises

• a polypropylene being a heterophasic propylene copolymer at an amount in the range from 40 to 82 wt % based on the total amount of the polymer composition, wherein the melt flow rate (MFR) of the polypropylene is in the range from 16 to 50 g/10 min as measured according to ISO 1133-1:2011 (230° C., 2.16 kg), and the xylene soluble part of the heterophasic propylene copolymer is in the range from 22 to 35 wt % based on the total amount of the heterophasic propylene copolymer as determined by ISO16152:2005, and
• a flame retardant composition comprising at least one phosphate selected from the group consisting of:
• melamine phosphate, melamine polyphosphate, melamine pyrophosphate, piperazine phosphate, piperazine polyphosphate, piperazine pyrophosphate, 2-methylpiperazine monophosphate, tricresyl phosphate, alkyl phosphates, haloalkyl phosphates, tetraphenyl pyrophosphate, poly(2-hydroxy propylene spirocyclic pentaerythritol bisphosphate) and poly(2,2-dimethylpropylene spirocyclic pentaerythritol bisphosphonate).