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membranas manufactures electrical grade, high-purity pressboard in sheets, made entirely of high-strength and purity sulphate (Kraft) unbleached cellulose fibers. most of our manufacturing equipment was designed or modified in-house and it's built to maintain the fiber's purity and adequately develop its mechanical strength.

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we produce mostly low-density calendered-type board but can also customize materials for client's needs by modifying density, flexibility and make special thicknesses that are not commonly available on the market.

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with over 25 years of expertise in insulating pressboard, membranas has continuously supplied all mexican oems of oil-filled distribution transformers and exported our board to north and south america. 

applications

  • key component of the insulation system for oil-filled electrical distribution and power transformers.​

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  • insulating parts for all kinds of oil-cooled electrical machines.

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  • ​miscellaneous mechanical and electrical parts that benefit from a high-purity material with no melting point.

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  • demanding packaging solutions.

specs

  • sheet size: 950 x 1350 mm and 950 x 1950 mm

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  • thickness: 0.5 to 6.0 mm

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  • density: from 0.9 to 1.2 g/cc

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  • custom sizes and thicknesses available upon request.

pressboard
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