• Polyethylene terephthalate (PET): PET comes from the polyester family, it is commonly used in beverage, food and other liquid containers. It has a strong gas and moisture barrier which help keep its contents chemically safe. It is very impact-resistant, shatter-proof, naturally clear (but can be colored) and has a glass-like transparency. It is also considered the "eco-friendliest" plastic since it is the number one recycled plastic in the globe.
  • Closure: the device that seals a bottle, keeping all its contents from spilling out.
  • Closure size:  the measurement of the neck finish of a bottle, expressed in two numbers. 
  • Injection Molding: a process by which a plasticized material is forced into a mold in order to create a container.

Figure 1.1 Ethylene Terephthalate Molecule ("n" is the number of repeat molecule units per PET chain)

Figure 1.1 Ethylene Terephthalate Molecule

("n" is the number of repeat molecule units per PET chain)


ANATOMY OF A PET BOTTLE

Figure 2. The major parts of a PET bottle

Figure 2. The major parts of a PET bottle

NECK FINISHES

Figure 3. Neck design wil vary according to the function of the container

Figure 3. Neck design wil vary according to the function of the container

WHY WE CHOOSE POLYETHYLENE TEREPHTHALATE (PET):

PET is arguably one of the most eco-friendly packaging materials available as it is infinitely recyclable, lightweight & non-toxic in nature.   

When it comes to performance, PET is the one to shine through it's the high clarity level & better impact properties when compared to HDPE. With its glass-like transparency vibrant colors can easily be seen though PET packaging making it the clear choice.

LET'S TALK SAFETY

There are  misconceptions about PET plastic: PET is 100% free of Bisphenol-A (BPA), phthalates, dioxins, lead, cadmium or endocrine disruptors. Bisphenol-A (BPA) is not used in the making of PET, it is present in polycarbonate (a different plastic). PET does not have any trace amount of BPA & no toxins are transmitted to the contents of PET packaging when heated or frozen. 

For more information on why "PET is BEST" click here.

Resources:

http://www.napcor.com/pdf/v4-11_NAPCOR_PET_Interactive.pdf
http://www.sfds.eu/f.a.q./bottles-hdpe-pp-or-pet.html
http://www.petresin.org/science_behindpet.asp