manufactured · input

Transformer Insulation Kraft Paper & Pressboard

Electrotechnical kraft paper and pressboard made from highly purified unbleached sulfate cellulose, used to wrap transformer windings and form inter-winding barriers. Thermally upgraded (TU) grades (Nomex blended or chemical treatment) are required for modern 65°C and 80°C rated transformers. Ahlstrom-Munksjö's Jönköping, Sweden mill is the only facility capable of producing electrotechnical crepe kraft paper to 3,000 mm width.

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Source countries

3

Companies

1

Goods affected

0

Claims on record

What depends on it

Goods that need this input

1 essential American goods rely on transformer insulation kraft paper & pressboard somewhere upstream in their supply chain.

Where it comes from

Source countries

Share of global supply, by country.

CountryShare of supply
SESweden30%
CNChina25%
CHSwitzerland20%
FIFinland15%
DEGermany8%

Who makes it

Supplier companies

3 companies produce transformer insulation kraft paper & pressboard.

Ahlstrom (formerly Ahlstrom-Munksjö)(AHLS)

HQ FI30% share

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.

Weidmann Electrical Technology AG

HQ CH15% share

Global leader in electrical insulation systems for power and distribution transformers. Headquartered in Rapperswil-Jona, St. Gallen, Switzerland. ~20 locations worldwide, ~3,300 employees. Products include kraft flat paper, crepe paper, coated paper, transformer board, and complete insulation systems. Subsidiary of Weidmann Group (Swiss family company). Supplies transformer OEMs globally including ABB/Hitachi Energy, Siemens Energy, GE Vernova. Commands ~15% global share of the transformer insulation paper, pressboard, and component market.

Krempel Group GmbH & Co. KG

HQ DE6% share

German manufacturer of electrical insulation materials with 100+ year history. Primary facility in Vaihingen/Enz, Baden-Württemberg. Products include presspaper, pressboard, diamond-dotted presspaper (DPP), kraft paper, corrugated board, and complete insulation component sets for oil-filled power and distribution transformers. One of the world's leading manufacturers of transformer presspaper/pressboard. Serves transformer OEMs across Europe and internationally.