US2019093289A1PendingUtilityA1
Paper containing scalenohedral precipitated calcium carbonate (s-pcc)
Assignee: KOEHLER SE AUGUST PAPIERFABRIKPriority: May 31, 2016Filed: Nov 29, 2018Published: Mar 28, 2019
Est. expiryMay 31, 2036(~9.9 yrs left)· nominal 20-yr term from priority
D21H 17/675D21H 19/385D21H 21/52
36
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Claims
Abstract
The invention relates to paper that contains scalenohedral precipitated calcium carbonate (s-PCC) of a certain specification. The invention further relates to the user of a s-PCC having a certain specification as filler material for paper.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1 . Paper, containing scalenohedral precipitated calcium carbonate (s-PCC) having a grain size distribution for which
D
4.3
D
90
times
100
≥
59
and the average grain size D4.3 is in the range from 1.5 to 5.0 μm.
2 . Paper according to claim 1 , in which the paper has a grammage from 20 to 90 g/m 2 .
3 . Paper according to claim 1 , in which the paper has a grammage from 200 to 500 g/m 2 .
4 . Paper according to claim 1 , in which
D
4.3
D
90
times
100
≥
60.
5 . Paper according to claim 1 , in which the s-PPC has an average grain size D4.3 in the range from 2.0 to 4.0 μm.
6 . Paper according to claim 1 , in which a degree of filling of s-PCC in the paper is in the range from 10% to 30% ash.
7 . Use of scalenohedral precipitated calcium carbonate (s-PCC) having a grain size distribution for which
D
4.3
D
90
times
100
≥
59
and with an average grain size D4.3 in the range from 1.5 to 5.0 μm as filler material for paper.Join the waitlist — get patent alerts
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