Producer
Nippon Shokubhai
World's largest superabsorbent polymer (SAP) producer; supplies SAP for Procter & Gamble (Pampers), Kimberly-Clark (Huggies), and other major diaper brands; baby diapers account for 70%+ of global SAP demand
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Superabsorbent Polymers (SAP) — World #1
45%Acrylic Acid + Acrylates
30%Electronic Materials
15%Inorganic + Other Chemicals
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Intelligence
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Did you know2023
Nippon Shokubhai is publicly known for diaper SAP (the powder that makes diapers absorbent), but the identical superabsorbent polymer is a critical component inside fiber optic cables — used as a water-blocking layer that swells to seal any breaches in cable jacketing, preventing water ingress that would degrade optical transmission. Every underground and submarine fiber optic cable contains Nippon Shokubhai-type SAP water-blocking tape or yarn. The same Japanese chemical company supplies both global diaper manufacturers (Pampers, Huggies) and global fiber optic cable manufacturers (Sumitomo, Corning, Prysmian) with chemically identical product used in completely different contexts. A Nippon Shokubhai SAP supply disruption simultaneously affects infant diaper availability globally AND undersea cable installation timelines for submarine data infrastructure.
Nippon Shokubhai Co., Ltd. ↗Incident2012
On September 29, 2012, an explosion occurred at Nippon Shokubai's Himeji Works plant in Hyogo Prefecture, Japan — the world's largest single-site superabsorbent polymer (SAP) production facility. The explosion, caused by a runaway reaction in an acrylic acid storage tank, killed 1 employee, injured 35 people, and was visible from kilometers away. Production at the Himeji facility was suspended for approximately 3 months during investigation and repairs. The explosion immediately created a global SAP shortage: Nippon Shokubai supplied approximately 22% of global SAP at the time, and the Himeji facility was their largest single plant. Procter & Gamble, which uses Nippon Shokubai SAP for Pampers production, disclosed supply constraints in its investor communications. SAP prices increased 15-20% within weeks of the explosion. The Himeji explosion is the defining case study for SAP supply chain concentration risk — demonstrating that a single industrial accident at one Japanese factory could simultaneously threaten diaper production for families worldwide. Post-Himeji, Procter & Gamble and Kimberly-Clark accelerated supplier diversification and strategic SAP inventory programs.
Nippon Shokubai Co., Ltd. ↗Origin2023
Nippon Shokubhai ("Japan Catalyst") was founded in 1941 to produce ethylene oxide (EO) via silver-catalyst oxidation of ethylene — a sophisticated catalytic process developed in the context of wartime Japan's need for domestic chemical production. Post-war, the EO platform expanded to acrylic acid (propylene oxidation), and in the 1970s-80s, Nippon Shokubhai developed superabsorbent polymer (SAP) chemistry — crosslinked sodium polyacrylate that can absorb 300x its weight in liquid. SAP enabled the modern disposable diaper: before SAP, diapers used cellulose fluff pulp alone, which was bulky and leaked. Nippon Shokubhai's SAP made ultra-thin, high-capacity diapers economically viable, accelerating the global adoption of disposable diapers from the 1980s onward. The catalyst chemistry company that began making industrial ethylene oxide in 1941 inadvertently created the chemistry that transformed infant care globally.
Nippon Shokubhai Co., Ltd. ↗