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US 2024/0200275 A1Published application
Molded pulp article and method for producing molded pulp article
AssigneeToppan Inc.
InventorsKoji SAKAIRI, Megumi ISHII
Life of this patent
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Abstract
A molded pulp article that has a high strength and allows drying during production to be completed in a short time, having a percentage of fibers having a fiber length of 1 mm or less in pulp is in the range of 15% to 35%, the pulp has an average fiber length in the range of 1.5 mm to 2.5 mm, the molded pulp article has a nitrogen content in the range of 200 μg/g to 1800 μg/g, and the molded pulp article has a thickness in the range of 0.8 mm to 2.0 mm.
Claims12
A molded pulp article, comprising:
- a percentage of fibers having a fiber length of 1 mm or less in pulp is in the range of 15% to 35%,
- the pulp has an average fiber length in the range of 1.5 mm to 2.5 mm,
- the molded pulp article has a nitrogen content in the range of 200 μg/g to 1800 μg/g, and
- the molded pulp article has a thickness in the range of 0.8 mm to 2.0 mm.
1 more element
A method for producing a molded pulp article, the method comprising the steps of:
- preparing a slurry containing pulp and water, the pulp having an average fiber length in the range of 1.5 mm to 2.5 mm;
- depositing the pulp on a paper-making mold having a three-dimensional shape to form a pulp layer;
- dehydrating the pulp layer to obtain an intermediate molded article;
- and
- holding the undried intermediate molded article between male and female molds, and heating the intermediate molded article to a temperature in the range of 130° C. to 200° ° C. while applying pressure in the range of 0.6 MPa to 6.0 MPa.
2 more elements
Dependencies are inferred from the claim text.