Back to results
US 12,606,957 B2Granted
Pulp mixture
AssigneeAlpla Werke Alwin Lehner GmbH & Co. KG
InventorsIrina Rauvanto, Lars Hilden
Life of this patent
Estimating the term…
Abstract
There is provided a use of a pulp mixture for forming a container in a mould, which pulp mixture comprises: 65-90%, such as 70-84%, by dry weight of a first pulp having a Schopper-Riegler (SR) number of below 48, preferably below 40, more preferably below 30; and 10-35%, such as 16-30%, by dry weight of a second pulp having a Schopper-Riegler (SR) number of 60-90, preferably 70-90, more preferably 77-90. A pulp mixture and a method of producing a pulp mixture are also provided.
Claims21
A molded container that comprises a pulp mixture, the pulp mixture including:
- 65-90% by dry weight of a first pulp, which is a resuspended softwood market pulp having an average length-weighted fiber length of above 1.75 mm and having a Schopper-Riegler (SR) number according to ISO 5267-1 of below 48;
- and
- 10-35% by dry weight of a second pulp having an average length-weighted fiber length that is less than the average length of the first pulp, and a Schopper-Riegler (SR) number according to ISO 5267-1 of 60-90.
A method comprising the steps of:
- a) providing a first pulp, which is a resuspended softwood market pulp having an average length-weighted fiber length of above 1.75 mm having a Schopper-Riegler (SR) number according to ISO 5267-1 of below 48;
- b) subjecting a first part of the first pulp and to low consistency (LC) refining to obtain a second pulp having an average length-weighted fiber length that is less than the average length of the first pulp, and having a Schopper-Riegler (SR) number according to ISO 5267-1 of 60-90;
- c) mixing a second part of the first pulp with the second pulp in such proportions that a pulp mixture comprising 65-90% by dry weight of the first pulp and 10-35%, by dry weight of the second pulp is obtained.
Dependencies are inferred from the claim text.