CA1048832A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Mechanical fluffed pulp and method of producing the same
Assignee: Essity Hygiene and Health AB
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Filing: 1976-02-23
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Granted: 1979-02-20
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Expires: 1996-02-23
Abstract
Abstract ABSTRACT OF THE DISCLOSURE The present invention relates to fluffed pulp comprising unwashed mechanical pulp with a liquid-diffusing capacity of at least 3.5 grams liquid per gram pulp per minute, a bulk of at least 18 cm3/gram and a volume weight in blocks or bales of at most 0.8 grams/cm3. The invention also comprises a method of producing such a fluffed pulp by means of defibrating the wood and thereafter drying the same with warm air to a dry content of 80-95% by weight without subjecting the pulp to any mechanical compression.
Inventors
- 👤 Sven U.T. Aberg
- 👤 Sven G. Bergdahl
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-07 14:10
CPC Classifications
D; D21; D21B; D21B1/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
46 words
Fluffed pulp, characterized in that it comprises unwashed mechanical pulp having a liquid diffusing capacity of at least 3.5 grams liquid per gram pulp per minute, a bulk of at least 18 cm3/gram and a volume weight in blocks or bales of at most 0.8 g/cm3.
Claim 2
Dependent Claim
46 words
Fluffed pulp, characterized in that it comprises unwashed mechanical pulp having a liquid diffusing capacity of at least 3.5 grams liquid per gram pulp per minute, a bulk of at least 18 cm3/gram and a volume weight in blocks or bales of at most 0.8 g/cm3.
Claim 3
Dependent Claim
34 words
Method of producing fluffed pulp according to claim 1, characterized in that wood is defibrated and there-after dried with warm air to a dry content of 80-95% by weight without resorting to mechanical compression.
Claim 4
Dependent Claim
49 words
Method according to claim 2, characterized in that the fluffed pulp is dried in two flash-drying stages having an intermediate terminal defibration, said fluffed pulp being dried to 60-85% by weight in the first stage and being terminally dried to 80-95% by weight dry pulp in the second stage.
Claim 5
Dependent Claim
25 words
Method according to claim 2, characterized in that defibration is carried out at a temperature of between 75 and 200°C, preferably between 100 and 150°C.
Claim 6
Dependent Claim
33 words
Method of producing fluffed pulp according to claim 2, characterized in that the wood is defibrated in a refiner or a defibrator, said wood being in the form of chips, pieces or shavings.
Claim 7
Dependent Claim
24 words
Method of producing fluffed pulp according to claim 2, characterized in that defibration is carried out in the presence of a surface-active organic substance.
Claim 8
Dependent Claim
18 words
Method according to claim 2 characterized in that defibration is carried out at a pH higher than 3.
Claim 9
Dependent Claim
18 words
Method according to claim 2, characterized in that defibration is carried out in the presence of hydrogen peroxide.
Claim 10
Dependent Claim
23 words
Method according to claim 2, characterized in that a bond-inhibiting agent is added to the flash-drying stage in the form of an aerosol.
References Cited (Backward Citations)
No citation records indexed.
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