Producer
Ahlstrom (formerly Ahlstrom-Munksjö)
Helsinki-based specialty fiber materials company. Its Jönköping, Sweden mill is the only facility in the world capable of producing electrotechnical crepe kraft paper in widths up to 3,000 mm — essential for high-voltage transformer winding insulation. Ahlstrom supplies approximately 30% of global transformer kraft paper.
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Inputs supplied
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Goods downstream
2
Facilities
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Stories
What they make
2 inputs Ahlstrom (formerly Ahlstrom-Munksjö) supplies
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Goods downstream
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Where they make it
2 facilities
Ahlstrom Jönköping Mill, Sweden →
SEmanufacturing
The only facility globally capable of producing electrotechnical crepe kraft paper up to 3,000 mm wide — the format required for large power transformer winding insulation. An investment in a new crepe machine in 2015 was specifically to extend capability for the most demanding EHV transformer applications.
Ahlstrom Paper (Taicang) Co. Ltd. →
CNJiangsu · processing
Ahlstrom electrotechnical paper production facility in Taicang, Jiangsu Province, China. As of 2024, has been serving the electrotechnical (transformer insulation paper) business for 15+ years — one of the earliest Western specialty paper producers in China. Produces insulating kraft paper and electrotechnical papers for the Chinese transformer market, which is the world's largest transformer market. Positioned to serve rapidly growing Chinese grid infrastructure and offshore wind buildout.
What else they do
Business segments
The company's full revenue map — where this supply-chain role fits within their broader business.
Transformer & Electrotechnical Kraft Paper
25%Filtration (Industrial + Beverage)
30%Medical & Healthcare Papers
20%Food & Technical Specialty
25%
Intelligence
What's known
Sourced claims about this company's role in supply chains — chokepoints, concentration, incidents, dual-use connections.
Did you know2023
Ahlstrom is simultaneously the world's largest transformer insulation kraft paper producer (~30% global market share) AND the world's largest tea bag paper manufacturer. The heat-sealable nonwoven that forms the pouch in Lipton, Tetley, and PG Tips tea bags is made by Ahlstrom — the same company whose Jönköping mill provides the electrotechnical kraft paper wrapped around high-voltage transformer windings. The transformer kraft paper provides electrical insulation for power transformers serving entire cities; the tea bag paper filters hot water through billions of morning cups globally. Both applications are made from the same cellulosic fiber manufacturing platform — precise fiber structure, controlled porosity, and chemical purity — that Ahlstrom has developed over 170 years. The paper insulating a 500kV grid transformer and the paper steeping your breakfast tea are made by the same Finnish-heritage specialty paper company.
Ahlstrom Oyj ↗Capacity2023
Ahlstrom's Jönköping, Sweden mill is the only facility in the world capable of producing electrotechnical crepe kraft paper in widths up to 3,000mm — the standard width needed for large power transformer winding insulation. Transformer winding machines require kraft paper in continuous rolls at consistent quality across the full winding width; EHV transformers require paper up to 3,000mm wide. No other manufacturer has maintained this width capability. If the Jönköping mill were destroyed or taken offline — by fire, flooding, labor action, or equipment failure — transformer manufacturers globally would face a supply gap with no near-term substitute. Large power transformer lead times of 24-36 months would extend further if insulation paper is unavailable. The entire global transformer manufacturing industry's production schedule is gated by a single Swedish mill that most people have never heard of.
Ahlstrom Oyj ↗Origin2023
Ahlstrom was founded in 1851 in Noormarkku, Finland by Antti Ahlström, a Finnish merchant, and grew as part of Finland's timber and paper industry. The company diversified over 170 years from bulk paper into specialty fiber materials — products where fiber structure, chemistry, and manufacturing precision determine function. In 2017, Ahlstrom merged with Munksjö (Swedish specialty paper, founded 1862) to form Ahlstrom-Munksjö. The merged entity was taken private by Bain Capital and Finnish family investors in 2021. The combined entity is now simply 'Ahlstrom.' The Jönköping, Sweden mill (originally Munksjö) is the company's most strategically irreplaceable asset — its capability to produce electrotechnical crepe kraft paper at 3,000mm width has no equivalent globally.
Ahlstrom Oyj ↗