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US 5,374,335 AGranted
Sized paper, process for producing same and use thereof
AssigneeEka Nobel AB
InventorsErik Lindgren, Ulf Carlson, Lennart Nilsson
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AssigneeEka Nobel AB
InventorsErik Lindgren, Ulf Carlson, Lennart Nilsson
Estimating the term…
The present invention relates to a sized paper containing a hydrophobic zeolite. Suitably, the sized paper is fine paper, kraft liner or paperboard. In paperboard intended for solid or liquid foodstuffs, tobacco or medicines, use is also made of the capacity of the zeolite to reduce, by adsorption, the problem of transfer from the package to its content of substances causing undesirable taste or hazardous substances. The present invention also relates to a method for production of the sized paper by forming and dewatering a suspension of lignocellulose-containing fibres, where the dewatering is carried out in the presence of a hydrophobic zeolite. Due to the inert nature of the zeolite, it can be used in papermaking within a very broad pH range. The present invention also relates to the use of a hydrophobic zeolite for the production of sized paper as well as use of the thus-sized paper in packaging material.
A sized paper of lignocellulose-containing fibers, including a hydrophobic zeolite, wherein the hydrophobicity of the zeolite characterized by the residual butanol content is below about 0.5 percent by weight.
A method for production of sized paper, comprising forming and dewatering a suspension of lignocellulose-containing fibers, wherein the dewatering is carried out in the presence of a hydrophobic zeolite, and wherein the hydrophobicity of the zeolite characterized by the residual butanol content is below about 0.5 percent by weight.
A method for rendering sized paper hydrophobic, comprising incorporating in the paper a hydrophobic zeolite, wherein the hydrophobicity of the zeolite characterized by the residual butanol content is below about 0.5 percent by weight.
A method for producing hydrophobic packaging material, comprising incorporating in sized paper a zeolite, wherein the hydrophobicity of the zeolite characterized by the residual butanol content is below about 0.5 percent by weight, and forming said packaging material from the sized paper.
Dependencies are inferred from the claim text.