What is PET Plastic?
  Polyethylene Terephthalate (PET) is linear thermoplastic, long-chain Polyethylene Terephthalate molecule consists of repeating units, white but bluish resin made from terephthalic acid and ethylene glycol through poly-condensation. Plastic PET is very important raw material used in man-made fibers. PET is a kind of polyester material for fiber, injection molded parts, as well as blow-molded bottles and jars. Special grades are offered with the required properties for the different applications.
Polyethylene terephthalate (PET) is used to make beverage, food and other liquid containers, synthetic fibers, as well as for some other thermoforming applications. Depending on its processing and thermal history, it may exist both as an amorphous (transparent) and as a semi-crystalline (opaque and white) material. It can be synthesized by a transesterification reaction between ethylene glycol and dimethyl terephthalate.
Plastic PET is supplied by the resin manufacturers in the form of small pellets, each about 0.05 grams. Its strength, temperature tolerance and wear-resistance made it an ideal replacement for or addition to natural fibers such as silk, cotton and wool.
PET containers are plastic containers made from polyethylene terephthalate and are used in a wide range of applications. This plastic material is manufactured from various by-products of the oil and gas industries, especially ethylene glycol and terephthalic acid.
Another advantage of the PET Plastic material lies in its physical properties that allow for great freedom in design.

Properties of PET Plastic
* PET consists of carbon, hydrogen and oxygen.
* PET can be incinerated without residues for energy recovery.
* PET is the most valuable of the recyclable plastics.
* PET is reusable as fibre filling for clothing, pallet strapping and moulding, carpeting, as well as in the manufacture of PET containers.

Plastic PET Characteristics
PET containers are widely popular in packaging industries world over. High performance PET is the result of special processes developed to enhance the material characteristics of PET material and can be tailored to specific requirements.
The most popular characteristics of PET are:
Plastic PET Material
Light weight
Shatter resistance
Economic cost
High clarity
Resealability
Recyclability
Physical Properties ASTM Test Method Units PET
Density D792 lbs/cu in.3 0.0499
Water absorption, 24 hours D570 % .10
       
Mechanical Properties ASTM Test Method Units PET
Specific Gravity D792 g/cu cm.3 1.38
Tensile Strength at break, 73° F D638 psi 11,500
Tensile Modulus, 73°F D638 psi 4 X 105
Elongation at break, 73° F D638 % 70
Flexural Strength, 
73° F		 D790 psi 15,000
Flexural Modulus, 73°F D790 psi 4 X 105
Izod Impact Strength, Notched, 73°F D256 ft-lbs/in. 0.7
Rockwell Hardness D785 --- R117
Coefficient of Friction @ 40psi, 50 fpm ---- Static/Dynamic 0.19/0.25
       
Thermal Properties ASTM Test Method Units PET
Heat Deflection, 264 psi D648 °F 175
Melting Point --- °F 490
Coefficient of Linear Thermal Expansion D696 in./in./-°F 3.9 X 10-5
Applicable Temp. Range for Thermal Expansion ---- °F 50 - 250
Max. Serving Temperature for Long Term ---- °F 230
Flammability UL94 --- HB
       
Electrical Properties ASTM Test Method Units PET
Volume Resistivity, 73°F D257 ohm-cm 1016
Dielectric Constant @ 60 Hz, (73°F, 50% RH) D150 --- 3.4
Dissipation Factor, @ 60 Hz, 73°F  D150 --- 0.002
Dielectric Strength D149 V/mil 400
       
Intrinsic Viscosity of Plastic PET
Intrinsic Viscosity (I.V.) is an important characteristic of PET. The I.V. of the material measured in dl/g (deciliters/gram) is dependent upon the length of its polymer chains.
The longer the chains, stiffer the material and higher the Intrinsic Viscosity. The average chain length of a particular batch of resin can be controlled during polymerization.
PET I.V. for:
* 0.60:- Fiber
* 0.65:- Film
* 0.76-0.84:- Bottles
* 0.85:- Tire cord