Camec 2023
STADLER designs and installs state-of-the-art light packaging sorting plant for TBM in Yokosuka, Japan

STADLER designs and installs state-of-the-art light packaging sorting plant for TBM in Yokosuka, Japan

STADLER has designed the facility to automatically sort light plastic packaging and LIMEX, an environmentally friendly, limestone-based material developed and produced by TBM. The plant will be part of a collaboration between TBM and the city of Yokosuka to promote the collection and recycling of plastic waste and LIMEX for the entire city and surrounding areas. TBM also plans to use the plant to develop a pioneering resource recycling model with the aim of contributing to a decarbonized society.

TBM is a Japanese unicorn company founded with the vision to “build on the past to create the future, with innovations to sustain a circular ecosystem lasting for centuries.” It aims to contribute to a decarbonized society through the development of new environmentally friendly materials and new resource recycling models.

TBM’s flagship product is a revolutionary sustainable material, LIMEX. It is an effective alternative to plastic and paper that can be used in the production of a wide variety of products, such as packaging, food containers, shopping bags, and backlit film. It is mainly made of limestone, an abundant resource, and has a water footprint approximately 97% smaller than paper and a carbon footprint up to 40% smaller than plastic on a life cycle basis (depending on the type of plastic). In addition, once used, it can be recycled to produce new plastic alternative materials. These characteristics have earned LIMEX the Asia-Pacific Stevie Award 2017 in the category of Innovation in Energy & Sustainability.

As part of its strategy to accelerate the use of LIMEX products and reduce consumption of natural resources, TBM commissioned STADLER to design and install a new state-of-the-art sorting plant. The facility uses the latest technologies to separate LIMEX and plastic light packaging, which is recycled into pellets for use in the production of packaging.

State-of-the-art technology and innovative thinking in a tailor-made design

The sorting plant receives bales of light packaging made of plastic materials and LIMEX, and sorts them into metals, PP, PE, PS, PET and mixed plastics for RDF, a 2D fraction and fines. The sorted output materials are stored in bunkers, and the 3D PP, PE, PS, PET and mixed plastics for RDF are subsequently fed to a baling press. The plant uses the latest technologies to achieve the high quality required to recycle the output products. These include STADLER’s double-deck ballistic separator, 2.9-meter wide high-speed conveyors and bunker system, as well as 5 Near-Infrared (NIR) automated optical sorters.

Due to the particular characteristics of the sorted materials and the space limitations in the building housing the plant, the project required the innovative thinking that STADLER is known for. “The plastic material we are processing at the plant is extremely light,” explains Ursina Mutzner, International Sales at STADLER. “When we ran trials with similar materials at our Test Center in Germany, we saw that the paddles in the double deck ballistic separator needed to be inclined more than the maximum 25 degrees the machine is designed for. So, when we designed the plant, we decided to place the ballistic separator on a slightly sloping steel structure in order to achieve the inclination of the paddles required to ensure the best sorting quality.”

Takuya Sugiyama, Division Head, Recycling Plant Business, TBM, adds: “The plant roof is quite low, so there wasn’t much space between the ballistic separator and the ceiling. At first, we thought we might have to remove part of the roof to place the machine, but STADLER’s commissioning team made the installation without any additional work. We at TBM greatly appreciate their effort!”

STADLER’s ingenuity in the design and build stages has paid off and the plant has been completed to TBM’s satisfaction: Takuya Sugiyama has expressed particular appreciation for the “European cutting-edge, beautiful design, the simple material flow and high levels of safety standards. Every small detail is designed beautifully. Everyone who visits the plant feels the same and gives us positive comments. This makes us happy to have worked with STADLER.”

A state-of-the-art plant delivered on a tight schedule

The project presented several operational challenges, beginning with logistics issues and component shortages: “Because of the global supply chain situation, it was difficult to source some components,” says Ursina Mutzner. “The warm commissioning was also challenging because of the shortage of test material, but we found ways of making it all work and have the plant installed and ready on time,” adds Megumi Sasaki, Japanese Adviser for STADLER.

Takuya Sugiyama agrees: “STADLER completed commissioning on schedule with a small but efficient team! It was amazing to take only 18 weeks from beginning to hand-over as originally planned. We felt STADLER’s professionalism every day at the plant.”

A collaborative approach from the very first contact to post-commissioning follow up

STADLER views its relationship with customers as a true partnership and will go out of its way to ensure they make the right decisions for their business and operation. For this project, it organized a visit for TBM’s team to view a similar plant it had built in Hyūga, in order to see first-hand the results they could achieve at their Yokosuka facility. Takuya Sugiyama found this very useful in making a choice: “We visited many sorting plants, and it was obvious that STADER’s plant has the highest level of operation excellence based on its great experience and know-how developed through their global business. We were also amazed at how beautiful STADLER’s plant is.”

When developing the design, STADLER conducted tests in Germany and then went the extra mile by testing TBM’s materials at the plant in Hyüga Takuya Sugiyama was very impressed: “We already had a good feeling about the STADLER plant, but the test gave us confidence on our decision and important evidence of what they could do for us.”

STADLER also provided extensive training to TBM’s operators so that they would be able to run the equipment effectively, and will continue to support the company as the plant operates. “Our real operation has just started, so that continuous support and communication between STADLER and TBM is very important. We would like to take this opportunity to thank everyone at STADLER for their work.”


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