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US 11,686,048 B2Granted
Aramid-based paper with improved properties
AssigneeTeijin Aramid B.V.
InventorsAntonius J. J. Hendriks, Yen Vu, Ernst Michael Winkler, Jan-Cees Tiecken
Life of this patent
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AssigneeTeijin Aramid B.V.
InventorsAntonius J. J. Hendriks, Yen Vu, Ernst Michael Winkler, Jan-Cees Tiecken
Estimating the term…
An aramid-based paper comprising at least 90 wt. % of aramid material, the aramid material including at least one of aramid shortcut and aramid fibrid, the paper including at most 40 wt. % aramid pulp, calculated on the total amount of aramid material, wherein the paper includes 0.1-10 wt. % of polyamido-amine epichlorohydrin (PAE). It has been found that the incorporation of 0.1-10 wt. % of polyamido-amine epichlorohydrin (PAE) into an aramid-based paper including at least 90 wt. % of aramid material calculated on the weight of the paper not including the PAE, the aramid material including at least one of aramid shortcut and aramid fibrid, the paper including at most 40 wt. % aramid pulp, leads to a surprising improvement of the z-strength and the tear strength of the paper.
Aramid-based paper comprising
A process for improving z-strength of an aramid-based paper, the process comprising including 0.1-4.5 wt. % of polyamido-amine epichlorohydrin (PAE), calculated based on dry weight of the paper, with at least 90 wt. % of aramid material, calculated on dry paper components not including the PAE, the aramid material comprising at least one of aramid shortcut, aramid fibrid and aramid fibril, and the paper comprising at most 40 wt. % aramid pulp, calculated on the total amount of aramid material.
Dependencies are inferred from the claim text.