Raw materials

Raw materials

In this section you can learn more about PET, its advantageous properties, as well as the numerous application possibilities on the market.

Rohstoffe

Rohstoffe

Was ist PET?

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ELLIE EXPLAINS:
PLASTICS - TOO VALUABLE TO THROW AWAY!

Source: PlasticsEurope AISBL / Youtube 
Length: 3:16 min

Allgemeines

General information about PET

Polyethylene terephthalate (PET for short) is a thermoplastic from the polyester family produced by polycondensation. PET has a wide range of applications and is used, among other things, for the production of plastic bottles (PET bottles), films and textile fibers. Worldwide production is 40 million tons per year.

PET is polar, so strong intermolecular forces are present. The molecule also has a linear structure without cross-links. Both are prerequisites for semi-crystalline areas and fibers. These areas also result in high tensile strength and dimensional stability at a temperature above 80 °C.

PET - PROCESS & HANDLING

WHERE CAN I FIND PET IN THE MARKET?

PET als Werkstoff gibt es bereits seit vielen Jahrzehnten am Markt. So werden unter anderem Fasern für die Textilindustrie und Folien hergestellt. Schauen Sie doch einmal auf das Etikett Ihrer T-Shirts! Im Bereich der Verpackungstechnik hat sich PET ebenfalls etabliert. Ob für kosmetische oder chemisch-technische Anwendungen, PET-Verpackungen haben sich seit Jahren am Markt positioniert.

The food industry in particular is becoming increasingly convinced of the advantages offered by PET packaging. The properties of this material allow the highest safety standards in the field of food processing.

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HOW IS A PET BOTTLE MADE?

To produce a PET bottle or container, a mould blank, the so-called "Preform", is first produced at 300° C under high pressure. This is similar to a chemistry test tube.

The PET preform is then heated to around 120° C by a machine. At a pressure of 40 bar, the PET preform is blown into the desired shape in the "Stretch blow molding process". The following animation shows this process in simplified form.

COMPARISON OF PACKAGING MATERIALS

THE HIDDEN BENEFITS OF PET PACKAGING

Many emotions, few facts

A constant demonization of plastic packaging recently led the Lithuanian EU Commissioner, Virginijus Sinkevicius, responsible for the environment, oceans and fisheries, to a rather unrealistic proposal for an EU-wide ban on disposable packaging! Possible alternatives to plastic packaging are increasingly appearing on the scene, which on closer inspection are by no means to be regarded as more sustainable.

In order to conduct an objective discussion on the topics of packaging and sustainability, figures, data and facts are indispensable. One of the most important parameters is the value of CO2 emissions. In order to obtain a neutral evaluation of this parameter from one of our 500 ml PET hotfill bottles to a glass bottle of the same size, we have commissioned the company ClimatePartner in Munich to prepare a calculation of the aforementioned emissions. Taking into account raw material extraction, production and delivery to the customer, the determination of the necessary values and their comparison produced a clear result.

THE OUTSTANDING PROPERTIES OF PET ARE:

PROPERTY

Material

PET PVC HDPE PP PS GLASS ALU.
Transparency
Impact resistance
Water barrier
Gas barrier
Hot filling
Microwave resistance
Recyclability
Neutral taste
Flexible Container Design

EVALUATION

excellent =

good =

ok =

bad =

COMPARISON OF PACKAGING MATERIALS

PET offers many advantages over other packaging materials. In particular, PET has very good gas barrier properties compared to other plastics.

Both the escape of CO2 and the penetration of oxygen into the contents are reduced to a minimum with PET. These are just some of the reasons why PET has become established on the market as a packaging material.

Assuming a realistic annual volume of 4.5 million bottles, the disposable glass bottle generates 186.3 tons more CO2 emissions than our PET bottle. This amount corresponds to:

0

km

by car

Annual CO2 absorption of

0

beech trees

0

people

from Germany

Hier wird deutlich, dass, insbesondere durch das enorme Gewicht von mehr als dem 7-fachen der PET-Flasche, die Glasflasche erhebliche Nachteile im Transport verursacht. Um endlich mit den teilweise unhaltbaren Anfeindungen in Richtung der PET-Flaschen aufzuräumen, fordern die Industrie und der Handel schon seit längerer Zeit vom Umweltbundesamt eine Erstellung einer neutralen Ökobilanz. Die heute verwendeten Werte gehen auf das Jahr 2010 zurück. Im Besonderen durch die stetig gestiegen Anzahl von individuellen Flaschen im Mehrwegsystem dürfte die Ökobilanz für das Mehrwegsystem nicht positiv ausfallen. Vielleicht ist das der Grund, wieso diese Bilanz bis heute nicht erstellt wurde!

PET - PROCESS & HANDLING

BEAUTIFUL & UNIVERSAL

The great transparency and the shiny surface offers a special charm and lend the PET-packaging a sophisticated image. New labelling solutions with double-sided printed labels give the bottle an outstanding beauty.

Das flexible Produktionsverfahren erlaubt eine nahezu unbegrenzte Designvielfalt. Im Besonderen das von EPROPLAST eingesetzte Maschinenkonzept und Werkzeugkonzept erlaubt eine universelle Formgestaltung mit minimalen Werkzeugkosten.

LIGHT WEIGHT

Up to 90% weight saving compared to glass! This makes transport, among other things, considerably more economical.

Due to the better mechanical properties, weight savings are also achieved compared to PE or PP bottles. In contrast with extrusion blow moulding, no material is wasted during the PET-production process.

PRODUCT SAFETY

Due to the excellent material properties, PET bottles are almost unbreakable. As a result, no breakage occurs during filling, transport and use.

Selbst bei einer Beschädigung gibt es keine Splitterteile, die Verletzungen verursachen können. PET sorgt für den optimalen Schutz bei allen Verbrauchern.

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