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US 12,768,111 B2Granted
Tissue paper and method for manufacturing tissue paper
AssigneeDaio Paper Corporation
InventorSachiko Takahashi
Life of this patent
Estimating the term…
Abstract
Tissue paper containing a softener, and having a dry tensile strength of 200 cN/25 mm or greater and 400 cN/25 mm or less in a longitudinal direction, a proportional limit tensile stress of 160 cN or greater and 250 cN or less in the longitudinal direction, and a displacement of 2.4% or greater at 150 cN is provided.
Claims7
A tissue paper comprising a softener,
- wherein the tissue paper exhibits:
- dry tensile strength of 200 cN/25 mm or greater and 400 cN/25 mm or less in a longitudinal direction;
- a proportional limit tensile stress of 160 cN or greater and 250 cN or less in the longitudinal direction;
- and
- displacement of 2.4% or greater at 150 cN, wherein displacement is measured by:
- setting a 25 mm-wide strip of the tissue paper between two opposing chucks spaced 100 mm apart on a tensile tester;
- pulling the tissue paper at a rate of 100 mm/minute until reaching 150 cN;
- releasing the tissue paper from the load;
- and
- measuring displacement of the tissue paper at a rate of 20 mm/minute until the tissue paper completely rebounds;
- and
- wherein the softener contains an oil content by 0.1% by mass or greater and 0.25% by mass or less in the softener, the oil content being extractable with diethyl ether, the tissue paper is produced by:
- forming, on a surface of a yankee dryer, a coating film having a thickness of 1 μm to 3.5 μm on the surface by applying a glue onto the surface in an amount of 1 kg to 4 kg per ton of the tissue paper;
- and
- creping the tissue paper from the surface.
12 more elements
A method for manufacturing tissue paper, the method comprising:
- performing papermaking using a pulp slurry to which a softener is added, to make a wet paper web, the softener having an oil content by 0.1% by mass or greater and 0.25% by mass or less in the softener, the oil content being extractable with diethyl ether;
- forming, on a surface of a yankee dryer, a coating film having a thickness of 1 μm to 3.5 μm on the surface by applying a glue onto the surface in an amount of 1 kg to 4 kg per ton of tissue paper;
- drying the wet paper web using the yankee dryer, to make tissue paper;
- and
- creping the tissue paper from the yankee dryer using a creping doctor.
2 more elements
Dependencies are inferred from the claim text.