Recovery of circulating raw materialsTake-up shaftDeinkingDrying furnaceGranulation (pelletizing)Washing tankReuse (e.g., filming)Source: Mitsui Chemicals, Inc.Source: Mitsui Chemicals, Inc.Feeding shaftresin recycling business is divided into three steps, depending on the state of the waste film to be recycled.Step 1 targets printed waste film generated by packaging converters. Laminated films are excluded. After the printing is removed and the film is clear and colorless, it is crushed, extruded, granulated, and returned to film.Step 2 targets mono-material waste film that has been printed and laminated. Adhesives and inks used for lamination are removed, and as in Step 1, the colorless and transparent film is granulated and returned to film again.The last step 3 targets waste film after it has been used by food manu-facturers, retailers, and consumers. In addition to the adhesives and inks per-formed in Steps 1 and 2, the film must be cleaned of food oils and odors.Multiple converters provide the waste filmLooking at Step 1 in detail, the tar-get film is a single-layer film for food packaging in which only printing is processed. The three materials are PP, PE, and PET. The plan is to establish a mechanism for PP first, followed by PE and PET. The reason for limiting the use of the target films in food pack-aging is that the Japanese Ministry of Health, Labor and Welfare’s “Guide-lines for the Use of Recycled Plastic Materials in Food Utensils, Containers and Packaging” states that “raw ma-terials should be limited to use plastic products for food use that have a sep-arate collection.” The film must be less than 800 mm in diameter, less than 1300 mm in width, and less than 640 kg in weight when rolled due to issues such as the cleaning process of printing ink. Gra-vure printing is expected to be the main printing method, while flexog-raphic and inkjet printing waste films will be tested to determine if they can be processed. Several converters have already offered their waste films, and the company hopes to gradually in-crease the number of converters in the future.Introduction of deinking equipment and recycled granulation equipmentStep 1 has already begun in May of this year at a dedicated plant built on the northwest end of the Nagoya Plant, which has a large site area of 380,000 m2. For your information, since the waste film may contain confidential in-formation, an IC card security system has already been installed at the plant entrance.The plant is equipped with a deink-ing facility installed in December 2021 and a recycled granulation facility in-stalled in March 2022, enabling the plant to complete the entire process from the reception of waste film to stor-age, deinking, granulation production, The flow of the demonstration experiment. Aiming to recycle from flexible packaging materials to flexible packaging materialsSchematic diagram of deinking equipment32
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