Your technical solution, Custom porous plastic

Your Technical Solution in Custom Porous Plastics

Yamahachi Chemical began operations in 1969 as a small manufacturer of plastic moulded parts for automobiles and electrical appliances in Gamagori, Aichi Prefecture. Today, the company is engaged in the production and development of porous plastics and related components for customers in various fields.

In 1977, Yamahachi Chemical started its own research and development of porous plastics and established the manufacturing technology of porous material for pre-inked stamps, now known as “PE Flash foam”. At the same time, the company collaborated with leading stamp manufacturers to develop innovative stamp-making systems optimised for use with PE Flash foam. In the 1980s, we began applying our porous manufacturing technology to develop porous nibs for art markers. These products, still used widely in the global stationery industry today, are continuously refined to improve quality and performance.

Today, we operate research, manufacturing, and sales facilities in both Japan and China, supplying porous products to customers worldwide across a growing range of industries beyond stationery. Leveraging our manufacturing technology and deep expertise in functional porous plastics — with core properties including absorption, application and wicking — we continue to develop innovative products and materials tailored to our customers’ technical needs.

Company History

Year	Milestone
1969	Yamahachi Kasei Kogyosho, the predecessor of Yamahachi Chemical, was founded to manufacture plastic moulded parts for the automotive and electrical appliance industries.
1971	Established a plastic injection moulding factory in Nishiura, Gamagori.
1977	Started research and development of porous plastics.
1980	Incorporated as Yamahachi Chemical Co., Ltd.
1981	Started developing porous nibs for marker pens.
1984	Established a dedicated porous plastic manufacturing facility in Nishiura, Gamagori.
1988	Established a stamp product manufacturing facility in Katahara, Gamagori.
1991	Developed a proprietary roller stamp manufacturing system (several patents filed) and launched roller stamps to the market.
1994	Launched PE Flash foam stamp material at the EMDC show (France), together with an advanced pre-inked stamp-making system.
2001	Established a manufacturing and sales facility in Changshu, China.
2007	Developed stamping ink for use with pre-inked stamps.
2014	Set up a porous nib assembly line at our Changshu factory.
2016	Our porous plastic technology was adopted for a tDCS (transcranial direct current stimulation)-based sports performance enhancement device.
2023	Released Roller Marker (rolling stamp)

Trade Show Participation

Paperworld China, EMDC Show (France), China Stationery Fair (CSF), ISOT (Japan), Tokyo International Gift Show (Japan), and others.

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