Chemistry experiments Chemistry experiments 99

March 2011March 2011

A glass bottleA glass bottle A plastic bottleA plastic bottle

type of type of materialmaterial

Glass of Glass of natrium and natrium and

siliciumsilicium

PETPET

subsistensubsistencece

Does not change Does not change with other materilaswith other materilas

Dangerous for our Dangerous for our health because of what health because of what it contains=additivesit contains=additives

Chemical structure

SiO2 SiO2 Na2O , K2O Na2O , K2O CaO, MgO CaO, MgO Al2O3 Al2O3 SO3 SO3 Fe2O3 Fe2O3 B2O3 B2O3

%%73,073,015,015,010,010,01,01,00,20,20,050,05

do 0,5do 0,5 PET

Adds in plastic bottles

• antioxidantsantioxidants

• metal deactivators metal deactivators

• UV stabilizatorsUV stabilizators

• softenerssofteners

• slide elementsslide elements

• materials for strenthningmaterials for strenthning

• colour addscolour adds

• adds against fireadds against fire

• antistatic addsantistatic adds

Be alert…

At higher temperature and when the plastic isold, dangerous elements get into food. These elememnts are:

• bisphenol A

• phthalates

Bisphenol A = BPA

Chemistry name is 4,4-dihydroxy-2,2-diphenylpropane.

Why is BISPHENOL AWhy is BISPHENOL Adangerous?dangerous?

• Its structure resembles woman’s Its structure resembles woman’s hormone.hormone.

• It causes obsrtuction in hormonal system..It causes obsrtuction in hormonal system..• It is possible that it causes trouble with It is possible that it causes trouble with

pregnancy, secretion of insuline which pregnancy, secretion of insuline which can lead to diabetes…can lead to diabetes…

• Causes breathing problems.Causes breathing problems.• Can cause problems with allergies of skin. Can cause problems with allergies of skin.

Phthalates

•Chemically are also known as phthalate esters.•They are used to soften plastic.•They are most often added to PVC.

Why are phthalates Why are phthalates dangerous?dangerous?

• They are not bound to plastic and can They are not bound to plastic and can get out of plastic materials.get out of plastic materials.

• They get into the body by breahting, They get into the body by breahting, through skin and by eating…through skin and by eating…

• Longlastin and chronical exposure to Longlastin and chronical exposure to phthalates can damage livers, kiddneys phthalates can damage livers, kiddneys and organs for reproduction…and organs for reproduction…

TYPES OF PLASTICS

International International markmark

The name of plastic The name of plastic materialmaterial

abbreviationabbreviation

polietilentereftalpolietilentereftalatat

PET/PETEPET/PETE

polietilenpolietilen

high densityhigh densityHDPE/HDPHDPE/HDP

PolivinilkloridPolivinilklorid PVC/VPVC/V

International International markmark

The name of plastic The name of plastic materialmaterial

abbreviationabbreviation

polietilenpolietilen

low densitylow density LDPE/LDPLDPE/LDP

Polipropilen=Polipropilen=

polipropenpolipropen PPPP

polistirenpolistiren PSPS

polikarbonat or polikarbonat or different types of different types of

plasticplastic

PC/PLA/PC/PLA/

OSTALOOSTALO

It is good…

Warn for you…

Do not use old plastic bottles.

Do not use plastic with this mark on it.

March 1March 1stst 2011 2011EU countries EU countries

banned banned the plastic bottles the plastic bottles which contain which contain bisphenol A that bisphenol A that are used for are used for

babies. babies. Will not be sold.Will not be sold.

June 1June 1stst 2011 2011

Countries are going to Countries are going to ban the sale and ban the sale and import of plastic import of plastic bottles that contain bottles that contain bysphenol A. Will be bysphenol A. Will be stopped.stopped.