Lightweight separating base paper
Number of patents in Portfolio can not be more than 2000
United States of America
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Mar 25, 2025
Grant Date -
Sep 9, 2021
app pub date -
May 14, 2019
filing date -
May 14, 2019
priority date (Note) -
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Abstract
The invention relates to a separating base paper, having a mass per unit area of at least 25 g/m2 and at most 40 g/m2 and a density of at least 0.90 g/cm3 and at most 1.15 g/cm3. The separating base paper comprises at least 50 wt % of long-fiber pulp and is coated on at least one side with at least two coatings. The first coating is located between a paper surface and the second coating. The second coating is a topmost coating and comprises a water-soluble film-forming polymer, nanofibrillated cellulose, microfibrillated cellulose or nanocrystalline cellulose. The Cobb-Unger (120 s) value of the surface having said first and second coatings is at least 0.01 g/m2 and at most 0.90 g/m2.
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