Did you know ... That's behind the PET bottle

thermoplastics

Although there are countless critical voices, the PET bottle has an enormous market share. Current trends in production are starting right on the ground. Because here is to be saved in weight, which in turn means less use of materials. pixabay.com, 422737
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After all, it has long been the consumer's favorite: the PET bottle. It is light and yet more stable or at least drinkable than a drinking carton. In terms of non-alcoholic drinks, the PET bottle, according to the Wirtschaftsvereinigung Alkoholfreie Getränke eV, is a clear leader. In 2014, the PET bottle alone accounted for 72.9 percent of the household's non-alcoholic beverages. Cardboard (4.6 percent), can (0.4 percent) and glass (0.1 percent) are significantly lower in the disposable sector.

And also in the reusable area, the PET bottle is 12.7 percent ahead of the glass bottle with 9.3 percent. Despite the PET boom, only very few consumers know what is actually behind the PET bottle. This article will answer the most important questions about the PET bottle.

This hides behind the common abbreviation PET

Polyethylene terephthalate, PET for short, is mainly used for polyester fibers. That should be a surprise for many consumers. Only one third of the total quantity is used for PET packaging (bottles, cans, etc.). This estimate is available in numbers: "In 2012, the volume of PET packaging produced worldwide amounted to 14.7 million tonnes. According to forecasts, this market is expected to increase to 19 million tonnes in 2017 (source: Pira International). "

Leader in PET growth is the Asian market with 29 percent. North America is ranked 2nd with 24 percent. Europe third (20 percent). Growing growth rates are also expected in Central and Eastern Europe, Africa, Central America and the Middle East. In addition, there is a parallel development that not only increases the number, but also makes the PET products literally flyweights - and thus reveals potential savings.

  • Thread and ground become lighter.
  • Neck areas become shorter and lighter.

The huge potential for reducing the weight of the PET bottle is shown by this arithmetic example: if only one gram per PET bottle can be saved, this means that with 100 million bottles, 100 tons of material can be saved. Also the technical change can enable further saving potentials. display

This creates a PET bottle

The PET bottle is produced in two successive production steps.

  1. First, a blank is created, which will later serve as a production model for series production. The granules are heated accordingly and enriched with the desired color pigments. Now, the liquid PET material, so the plastic, poured into a designated mold. There he cools down. This production step - the production of the production pattern - is the most costly because efficiency is not possible in the production of a single piece.
  2. The cast form is then further processed by the bottler. This uses the so-called stretch blow molding machine, in which the PET bottle is reheated. Now, an inner mandrel is fed into the mold, which stretches it in the length and with compressed air in the width. At the end of this production step, the mold opens.

The finished bottle is rarely sent unprocessed. Much more often, it is equipped with a lid and a label. In this video, the production process is once again vividly illustrated:

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This classic bottle shape is only a fraction of what falls under PET production. Pixabay.com, Hans

Variety of shapes in the PET process

It is clear to every consumer that PET bottles come in different shapes and sizes. What is new, however, is that not only are PET bottles, jars and cans manufactured in this way, but also completely different types of packaging can be ordered. Packari.de, for example, offers plastic cosmetic bottles, PET cans, PET bottles and also PET bottles for foods such as juices, smoothies and even carbonated drinks.

It is striking that the mentioned PET products all come into direct contact with humans and although there were also clear negative headlines around plastic bottles. Although there is quite a large pool of opinion, it is also possible to pronounce a clear all-clear: "The Federal Institute for Risk Assessment does not have any health concerns as a result of using PET bottles in all cases (far) below the legal limits. "Consumers can rely on labeled and labeled products and their healthy taste. At this point, of course, the manufacturers do not stand still and increasingly rely on novel coatings that allow an untapped taste experience.

The trends in the industry show that PET has long since been written off

Especially in terms of design, the PET bottle is the leader of the trendsetter, because: Depending on the mold, bottles of any kind and in all available colors can be produced. The design factor is therefore an important consideration, so that the premium range can be convinced of the new feel and the new design. The efforts mentioned at the beginning to make PET bottles lighter also take ecological considerations into account.

In the near future, the PET bottle may also be provided with an alternative brother called PEN. According to experts, PEN should be heat-resistant and UV-repellent. Better suited for hot-filling and with less bending strength PEN is equipped and tries to establish itself on the market. Under the letter PEN, these bottles are rarely known. However, if you have a water purifier at home, you know the bottles, which are supposed to save you from having to carry your crate. The PEF variant created from plant waste has also been discussed.

(, 27.06.2017 -)