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ZIPPER PET CASE

Polyethylene terephthalate , commonly abbreviated PET is the most

common thermoplastic polymer resin of the polyester family and is usedin fibers for clothing, containers for liquids and foods, thermoforming for

manufacturing, and in combination with glass fiber for engineering resins .

PET consists of polymerized units of the monomer ethylene terephthalate , with

repeating (C ! " #$ %& units. PET is commonly recycled, and has the number 1 as

its recycling symbol .

Physical properties

PET in its natural state is a colorless, semi'crystalline resin. ased on how it is

processed, PET can be semi'rigid to rigid, and it is very lightweight. )t ma*es a

good gas and fair moisture barrier, as well as a good barrier to alcohol (requires

additional +barrier+ treatment& and solvents. )t is strong and impact'resistant . PET

becomes white when e posed to chloroform and also certain other chemicals such

as toluene.

Biodegradation

-hen a plastic ob ect is abandoned in nature, ultraviolet sunlight provides the

energy of activation required to start the incorporation of o ygen in their

molecules . This process causes the ob ect to become brittle and fragmented into

small pieces increasingly until the polymer chains reach a sufficiently low molecular

weight so that they can be metabolized by microorganisms.

"owever, PET is a particularly durable material to biodegradation due to their high

crystallinity and the aromatic nature of their molecules, which is considered not

biodegradable.

https://en.wikipedia.org/wiki/Thermoplastichttps://en.wikipedia.org/wiki/Polymerhttps://en.wikipedia.org/wiki/Polyesterhttps://en.wikipedia.org/wiki/Synthetic_fiberhttps://en.wikipedia.org/wiki/Packaginghttps://en.wikipedia.org/wiki/Thermoforminghttps://en.wikipedia.org/wiki/Resinshttps://en.wikipedia.org/wiki/Polymerhttps://en.wikipedia.org/w/index.php?title=Ethylene_terephthalate&action=edit&redlink=1https://en.wikipedia.org/wiki/Resin_identification_codehttps://en.wikipedia.org/wiki/Toughnesshttps://en.wikipedia.org/wiki/Polymerhttps://en.wikipedia.org/wiki/Polyesterhttps://en.wikipedia.org/wiki/Synthetic_fiberhttps://en.wikipedia.org/wiki/Packaginghttps://en.wikipedia.org/wiki/Thermoforminghttps://en.wikipedia.org/wiki/Resinshttps://en.wikipedia.org/wiki/Polymerhttps://en.wikipedia.org/w/index.php?title=Ethylene_terephthalate&action=edit&redlink=1https://en.wikipedia.org/wiki/Resin_identification_codehttps://en.wikipedia.org/wiki/Toughnesshttps://en.wikipedia.org/wiki/Thermoplastic

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Plastic bottles of sodas and water ta*e between !! and !!! years to

decompose. /ost of these bottles are made of polyethylene terephthalate called a

plastic (PET& , which is a very resistant material to degrade in the environment.

"owever, one study has found that microbes 0ocardia species are capable of

carrying out a +slow and wea*+ PET, with its ability to synthesize certain esterase

biodegradation.

PET recycling

There are different alternatives which can be recycled PET from the mechanical,

chemical and some that have been raised in other countries for reuse PET or find

useful PET containers, in order to reduce its environmental impact and the volume

recycled of these in garbage dumps.

1 Mechanical recycling 2 This type of system is the most conventional recycling for

PET. )t consists of a series of steps to which the material is sub ected to cleaning

and processing, without involving a chemical change in its structure. -henconsidering this type of recycled PET it is important to *now the origin of the

residue (residue of industrial process or post'consumer waste& also is important to

consider the application which will be used (fiber, sheet, cylinder, drum, band ...&

and whether this will have any contact with food. The quality of the resulting

product will be completely lin*ed to the previous separation of plastic materials,

impurities and course of cleaning. Thus, it is important to perform minutely

selection process and thread (separation, cold wash, hot wash, drying, etc.& for each case.

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Negative effects on the environment

The main environmental problem of PET is discarded, because once it becomes

waste, it is *nown his presence in the channels of surface currents and drainage

causing bloc*age and difficulties in the process of desilting , easing flooding. 3nd in

the streets, forests, ungles and the ocean, generating + un*+ .

3lthough the physical and chemical characteristics ensure that this material is inert

in the environment, the visual impact that inadequate provision is high andperceptible to the population.

PR !ECT "ESCRIPTI N

PET plastic is a material that is causing serious environmental damage. 4ue to

mass production and the difficulties in disposal5 rivers, la*es and oceans are

contaminated by this material. 6arge tracts of land are not enough to contain the

vast amount of non' degradable material.

7aced with this big problem facing society and that is affecting ecosystems

immediate solutions are sought. The most important are the reduction, recycling

and reuse Pet. 3s engineering students you want to implement recycling of PET

plastic bottles for later use in the creation of cases made by hand, which can be

used for many purposes. The following materials , procedure, and costs for the

preparation of these cases is described in detail 5 and the different uses that can

give you. To assist with the reduction of this material as a contaminant for

ecosystems.

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MATERIA#

-e need2

• PET bottles of soda or water.• scissors• Cold silicone• Colored zippers