Question

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Answer 1

1. polythene bag synthetic polyethylene (HDPE)       is a very flexible material with very unique flow properties that makes it particularly suitable to plastic film applications like shopping bags. LDPE has high ductility but low tensile strength which is evident in the real world by its propensity to stretch when strained.
2. pet bottle syntheic polyethylene terephthalate (PET       PET provides very good alcohol and essential oil barrier properties, generally good chemical resistance (although acetones and ketones will attack PET) and a high degree of impact resistance and tensile strength. The orienting process serves to improve gas and moisture barrier properties and impact strength.
3. pvcpipe synhetic PVC stands for polyvinyl chloride       Some of the most significant properties of Polyvinyl Chloride (PVC) are: Density: PVC is very dense compared to most plastics (specific gravity around 1.4
4. Economics: PVC is readily available and cheap.
5. Hardness: Rigid PVC is very hard.
6. Strength: Rigid PVC has extremely good tensile strength.