Multilayered fibrous sheet, a method for making a multilayered fibrous sheet, and use of mechanical pulp
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United States of America Patent
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Jun 25, 2024
Grant Date -
Oct 21, 2021
app pub date -
Apr 16, 2021
filing date -
Apr 16, 2020
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Abstract
According to an example aspect of the present invention, there is provided a multilayered fibrous sheet, such as paperboard, having a first layer comprising a first fibrous material, a second layer, spaced apart from the first layer, comprising a second fibrous material, and a third layer between the first and the second layers, comprising a third fibrous material, wherein at least one of the first and the second fibrous materials comprises or consists of a mixture of chemical pulp and mechanical pulp; and the third fibrous material comprises or consists of mechanical pulp.
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