How does PES compare to polycarbonate plastic?

Bisphenol-A containing polycarbonate plastics and epoxy resins have several mechanical characteristics that initially make them appear to be attractive candidates for the manufacture of food containers.  Polycarbonate plastic made with BPA is resistant to breakage from impact and it can be molded into structurally rigid containers with light, thin and colorful transparent sidewalls.  While its surfaces are not entirely abrasion resistant, they are very hard and smooth and therefore are relatively easy to clean.  BPA epoxy resins can be readily applied to food cans and bottle caps to prevent their contents from reacting with their metal bodies.  Finally, polycarbonate plastics and BPA epoxy resins are structurally sound when used at temperatures as high as 266 degrees Fahrenheit.  This is well above the 212 degrees Fahrenheit at which water is boiled and is used for sterilization.  However, it is now also generally understood that Polycarbonate plastic and BPA epoxy resin lined containers readily released their BPA when heated to temperatures approaching 212 degrees or when exposed to some bleaches and alkali cleansers.  Low levels of BPA have even been discovered in water contained in polycarbonate containers stored at room temperatures.

Smart Baby has selected PES for the construction of its baby bottles precisely because many of its mechanical characteristics are shared with or are superior to those of BPA containing polycarbonate plastics. PES is capable of rendering the same shapes and dimensions in food containers as polycarbonate plastics.  PES is physically highly durable without the use of BPA. In the addition to rooting out BPA, we have an extensive list of chemicals that we look for to make sure that our products are safe.  To reach this conclusion we conduct both chemical and biologic testing.  PES is also ideal for the construction of baby bottles because it can be safely and easily sterilized.  PES plastics will maintain their tensile strength and form with continuous use at temperatures as high as 356 degrees Fahrenheit.  While it is clear that food would never be stored and served at temperatures in this range, PES’ exceptional heat resistance does make it safe for both cleaning in the upper racks of dishwashers and suitable for sterilization by boiling in water.  PES plastics’ hardness helps to prevent the build -up of residues that may harbor harmful bacteria and makes Smart Baby bottles easy to clean by washing with simple mild soap and water.