The quality of recyclates is seen as too low. Improvements are possible by using additives, as was shown by the exchanges during the Forum Plastic Recyclates.

Quite clearly, the central theme of this year’s conference  was additives for recycling materials.

16:9

Streifinger, Florian

Recycling

Umweltmanagement

Kunststoff Werkstoffe

Kunststoff-Recycling

Kunststoffverarbeitung: Verfahren

Kunststoff-Aufbereitung

Kunststoff-Rezyklat

Additive

Kreislaufwirtschaft

Additives Are Decisive

RCS Plastics processes PET flakes into high-quality regranulate for preform and beverage bottle manufacturers. To ensure the required food quality of the recycled material, the company relies on Sikora technology for the quality control of the rPET flakes and pellets.

Cedric Steeg, Employee in Quality Assurance, holds material sample in front of the Puritiy Concept V.

Qualitätssicherung

Polyethylenterephthalat

Thermoplaste

Check Food Quality of Recyclates

The quality of recyclates can be improved very well by means of suitable additives. An overview of the variety of products and their suppliers.

Overview: Additives for Plastic Recyclates

Stabilisatoren

Vitamins for the Circular Economy

Metal-effect pigments make for attractive designs, but they cause problems with recycling. These can be resolved with a special silver pigment.

Plastic products with a metal-effect finish are attractive. However, the effect pigments make recycling difficult.

Pigmente

Farbstoffe und Pigmente

Effektpigmente

A Silver Lining for Recycling

In general, recycled chocolate molds of PC do not meet the food contact requirements. A new recycling strategy is to provide a remedy.

Polycarbonate is frequently used for molds in chocolate production.

Polycarbonat

The Chocolate Side of Polycarbonate

The stabilization of used plastics is costly. Online measurement during compounding allows for stabilization directly in production.

Plastic waste often has a very different stabilizer content. This must be precisely determined in the recycling process. 

Determined Online, Recyclate Wins

The new plant will immediately produce an approximate 18,000 tons per year of recycled material from near-household collection.

At the new plant, the joint venture produces recycled PET granulate based on bottles from household waste for the production of new preforms and bottles.

Alpla Starts rPET Production in Romania

German specialist for chemical PET recycling expands capacity by up to 200 t of used plastic bottles per day.

From left to right: Jan van Kisfeld Managing Director), Dr. Vivek Tandon (Founder ) and Benjy Thompson (CEO of the Development Authority of Bulloch County).

Unternehmen

kunststoffe.de

Revalyu Builds Major Facility in the USA

Each year, more than one million tons of plastic waste are generated in Kenya – so far unused. T3 wants to change this and invests in a bottle-to-bottle recycling plant from Starlinger.

Around 1,334,000 tons of plastic become waste in Kenya each year.

Starlinger Installs First Plant in Kenya

At the beginning of March, Tomra opened a second testing center at its German head office to conduct thorough testing on a wider range of sorting processes.

Also at the beginning of March, Tomra opened a second testing center at its German head office to conduct thorough testing on a wider range of sorting processes.

Ehrhardt, Melanie

Testing out the Circular Economy

The company will build a modern plant in Ballito in the South African province of KwaZulu Natal by autumn 2024.

From 2025, the internationally active packaging and recycling specialist will produce around 35,000 tonnes of rPET per year at its new recycling plant in South Africa.

Verpackungsmittel aus Kunststoffen

Kunststoffverarbeitung

Alpla Builds New Plant in South Africa

Duytan Plastic Recycling will increase its reprocessing capacity to 60,000 tons of plastics.

Duytan Plastic Recycling is the first PET bottle-to-bottle recycler in Vietnam.

Vietnamese Recycler Installs Third Starlinger Line

Christian Schiller’s goal is to turn the phrase “plastic waste is recyclable material” into reality. His tool of choice: digitalization.

Digitale Transformation

Wirtschaft

Innovationen und neue Technologie

Start up

Unternehmen und Unternehmer

“We See Our Work as Basic  Digitalization“

Solvay and Hegen Partner to Bring the First Baby Bottle Made with Recycled Content to the Market.

In the future, Hegen will manufacture baby bottles from mass-balanced PPSU recyclate.

Messe Fakuma

kunststoffe-international.com

Recyclates Now Also for Baby Bottles

Using the latest technological advances in flake sorting helps bridge the gap between supply and demand.

Mixed plastic waste: With about 180.5 million t polyolefins make up the lion‘s share of annual plastics production.

Quantum Leap in Recyclates Quality

Compensating for Darkening in Recycled PET

The increasing demand for recyclates and the shortage of food-grade PET flakes pose challenges for batch quality and color consistency.

Polyethylene terephthalate (PET) is a model student when it comes to plastics recycling. However, rising demand for recycled materials and shortages of food-grade PET flakes are proving problematic in respect of batch quality and color consistency.

The biggest headache for recyclers and converters is managing the L-value waste. While it is possible to correct the color of rPET with tailored formulations that act on a* and b*, darkening of the material and, more precisely, the reduction in the L* value, are very difficult to avoid.

Italian additives manufacturer Repi offers various additives for the recycling of PET that can serve to improve the quality of the recycled materials. These include additives that compensate for yellowing, increase brightness and gloss, along with chain extenders for increasing the molecular weight and improving mechanical properties. The company claims that the additives can be used at various stages in the rPET value chain, from recycling to preform and tray production, without detriment to the processes.

A new additive is now expected to solve the problem of L-value reduction. Called StabiPlus, this is a liquid formulation that acts as a stabilizer and prevents aging and discoloration of rPET. Repi says that the additive can be used both in mechanical recycling and directly by converters in the production of packaging. This ensures flexible metering. According to the manufacturer, the stabilizer does not affect the intrinsic viscosity or the mechanical properties of rPET. As a result, it widens the window for using recycled PET.

Repi S.R.L.  

https://www.repi.it

Repi offers various additives for recycling PET, which can be used, for example, to prevent the material from darkening.

2022-11-04 - Repi

Messe K-Kunststoffmesse

issue 07/2023

issue 06/2023

issue 05/2023

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