Monday, 8 April 2013

polypropylene (PP) common plastic containers

 this is a polypropylene (pp) symbol i found on a yoghurt carton. this means or indicates that its properties are are tough, strengh and it has a reistance to heat, grease, oil and chemicals. it also has a barrier to moisture.
 also a polypropylene (pp) found on a margarine box

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