US 11,932,740 B2
3D-formable sheet material
Johannes Kritzinger, Olten (CH); Michel Schenker, Schoenenwerd (CH); Patrick Gane, Rothrist (CH); and Philipp Hunziker, Cincinnati, OH (US)
Assigned to FIBERLEAN TECHNOLOGIES LIMITED, Cornwall (GB)
Filed by FiberLean Technologies Limited, Cornwall (GB)
Filed on Jun. 7, 2022, as Appl. No. 17/834,086.
Application 17/834,086 is a continuation of application No. 16/736,262, filed on Jan. 7, 2020, granted, now 11,384,210.
Application 16/736,262 is a continuation of application No. 15/292,491, filed on Oct. 13, 2016, granted, now 10,577,469, issued on Mar. 3, 2020.
Claims priority of application No. 15189863 (EP), filed on Oct. 14, 2015; and application No. 16166349 (EP), filed on Apr. 21, 2016.
Prior Publication US 2023/0130544 A1, Apr. 27, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C08J 5/18 (2006.01); B29B 15/00 (2006.01); B29C 51/00 (2006.01); B29C 51/08 (2006.01); B29C 51/10 (2006.01); B29K 509/02 (2006.01); B29K 601/00 (2006.01); C08K 3/26 (2006.01); C08L 1/02 (2006.01); C08L 1/04 (2006.01)
CPC C08J 5/18 (2013.01) [B29B 15/00 (2013.01); B29C 51/002 (2013.01); B29C 51/08 (2013.01); B29C 51/10 (2013.01); C08K 3/26 (2013.01); C08L 1/02 (2013.01); C08L 1/04 (2013.01); B29K 2509/02 (2013.01); B29K 2601/00 (2013.01); C08J 2301/02 (2013.01); C08J 2401/02 (2013.01); C08K 2003/265 (2013.01); C08K 2201/005 (2013.01); C08K 2201/006 (2013.01); C08L 2205/025 (2013.01); C08L 2205/16 (2013.01)] 11 Claims
 
1. 3D-formable sheet material, characterized by comprising:
(a) a cellulose material in an amount from 15 to 55 wt.-%, based on the total dry weight of the 3D-formable sheet material, wherein the cellulose material is a cellulose material mixture comprising:
(i) microfibrillated cellulose in an amount of ≥55 wt.-%, based on the total dry weight of the cellulose material mixture, and
(ii) cellulose fibres in an amount of ≤45 wt.-%, based on the total dry weight of the cellulose material mixture,
and the sum of the amount of the microfibrillated cellulose and the cellulose fibres is 100 wt.-%, based on the total dry weight of the cellulose material mixture, and
(b) at least one particulate inorganic filler material in an amount of 45 wt.-% to 85 wt.-%, based on the total dry weight of the 3D-formable sheet material,
wherein the sum of the amount of the cellulose material and the at least one particulate inorganic filler material is 100.0 wt.-%, based on the total dry weight of the cellulose material and the at least one particulate inorganic filler material;
wherein the 3D-formable sheet material has:
(x) a normalized stretch increase per level of moisture content in the range from 0.15 to 0.7% per percent moisture, and
(y) an elongation at break of at least 6%, and
(z) a sheet weight from 50 to 500 g/m2.