BY- MAYANK MANCHANDA 8-E 19

Poly Ethene Tetraphthalate PET

Poly ethlene tetra phthalate (sometimes written poly(ethylene terephthalate), commonly abbreviated PET, PETE, or is a thermoplastic polymer resin of the polyster family and is used in synthetic fibres; beverage, food and other liquid containers; thermoforming applications; and engineering resins often in combination with glass fiber.BY MAYANK

• The majority of the world's PET production is for synthetic fibers (in excess of 60%), with bottle production accounting for around 30% of global demand. In the context of textile applications, PET is referred to by its common name, “POLYSTER," whereas the acronym "PET" is generally used in relation to packaging. Polyester makes up about 18% of world polymer production and is the third-most-produced polymer ; POLYTHELYNE (PE) and POLYPROPYLENE (PP) are first and second, respectively. 

• BY MAYANK

Rohan chutani

PET is approved as safe for contact with foods and beverages by the FDA and health-safety agencies throughout the world. The safety of PET for food, beverage, pharmaceutical and medical applications has been repeatedly demonstrated through extensive studies, regulatory approvals, testing, and its widespread acceptance for more than 30 years. PET does not contain bisphenol-A (BPA) or phthalates (plasticizers).

Global Safety Approval

1)PET is completely recyclable, and is the most recycled plastic in the U.S and worldwide.2) More than 1 billion pounds of used PET bottles and containers are recovered in the United States each year for recycling.3) PET can easily be identified by the #1 in the triangular “chasing arrows” code, which is usually found molded into the bottom or side of the container. No other plastic carries the #1 code.

Fully Recyclable

Sustainable

PET is a very energy-efficient packaging material. Although its raw materials are derived from crude oil and natural gas, it enjoys a very favorable sustainability profile in comparison to glass, aluminum and other container materials.

Its sustainability jumps even higher when recycling is introduced, since approximately 40% of PET’s energy use is attributable to its “resource energy” – the energy inherently trapped in its raw materials that can be recaptured and reused through recycling.

Increase of COOH end-groupsIncrease of color number bIncrease of haze (transparent products)Increase of oligomer contentReduction in filterabilityIncrease of by-products content such as acetaldehyde, formaldehydeIncrease of extractable foreign contaminantsDecrease in color LDecrease of intrinsic viscosity or dynamic viscosityDecrease of crystallization temperature and increase of crystallization speedDecrease of the mechanical properties like tensile strength, elongation at break or elastic modulusBroadening of molecular weight distribution

• Mam ….. I wanted to tell you that , HIMANSHU YADAV, gave me a blank CD and In the school he told me that there was a PPT in it,,,, later , at home I found out  that it was totally BLANK.