Started horizontal recycling demonstration test of conductive sheet.

Unique deinking technology promotes plastic resource recycling

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TOYO INK CO., LTD. of artience group (President and Representative Director Hideki Yasuda (Chuo-ku, Tokyo) has started a demonstration test with Marui Co., Ltd. (President and Representative Director Michiya Muramatsu, Ichikawa Misato Town, Yamanashi Prefecture) to establish a "horizontal recycling" scheme for conductive sheets.

Conductive sheets are plastic substrates coated with conductive and anti-static inks, and are mainly used in conductive trays and carrier tapes for conveying electronic components used in electrical appliances and automobiles to protect them from static electricity. Printing on such plastics is difficult to separate from the substrate, which is one of the factors that hinders the promotion of recycling.

The "Recyclable Conductive Sheet" jointly developed last year is a conductive sheet that makes it possible to easily deink printed conductive inks without compromising the surface resistance and vacuum formability of conductive sheets by introducing TOYO INK "deinking technology" to Marui's conductive sheet "Super Clean Sheet". By providing a deinking layer that dissolves by alkaline treatment between the plastic, which is the substrate of the conductive sheet, and the conductive ink, the deinking layer dissolves when the conductive sheet is heat treated in an alkaline solution, and the conductive ink is deinked from the plastic substrate. This allows used plastic substrates that were previously treated as plastic waste to be reused as plastic raw materials. In addition, since conductive inks do not dissolve in alkaline solutions and can be deinked in the state of the film, alkaline solutions can also be used repeatedly by recovering the membrane (^*).

Composition of recyclable conductive sheet

Deinking process of trays made of molded recyclable conductive sheets

This time, we collected scraps and tray samples generated when Maruai's "recyclable conductive sheets" were molded into conductive trays at a processing company. TOYO INK A demonstration experiment of "post-industrial recycling" was conducted in which transparent plastic pieces that have been crushed and deinked with a strip to remove conductive ink are re-sheeted as sheets for conductive trays at a sheet manufacturer.

In addition, we will conduct demonstration experiments targeting "post-consumer recycling" of used conductive trays, and establish a "horizontal recycling" scheme from plastic product collection, deinking to recycling, with the aim of recycling plastic resources.

In order to use alkaline solutions repeatedly, it is necessary to maintain a constant control of the alkali concentration range based on the dissolution of the deinking layer.

Exhibition schedule

Recyclable conductive sheets are scheduled to be exhibited at the "Sustainable Materials Exhibition".

Exhibition name	Sustainable Materials Exhibition
Dates	November 12, 2025 (Wed) ~ November 14, 2025 (Fri) 10:00~18:00 (until 17:00 on the last day only)
Location	Makuhari Messe (Chiba City, Chiba Prefecture)
Our booth	Hall 4 23-52
Organized by	RX Japan Co., Ltd.
Exhibition Overview	Packaging Recycling Solutions Mono-Material Solutions Paper Solutions
Exhibitor company	TOYO INK CO., LTD.
URL	https://www.material-expo.jp/tokyo/ja-jp.html#/

Recycling Solutions
https://www. artience group.com/ja/products/solution/recycle/
TOYO INK, cooperative production, Toyobo establishes a "horizontal recycling" scheme for product sample sheets for vending machines
https://www. artience group.com/ja/news/2025/25110701.html

About Maruai Inc.

Marui Co., Ltd. is a paper and chemical product manufacturer that manufactures and sells daily paper products such as office envelopes and industrial packaging materials to protect food and precision equipment. Among them, we have more than 500 types of celebratory bags and non-celebratory bags, and we have a high market share in the industry. For more information about Maruai Co., Ltd., please visit their website.
https://maruai.co.jp/