US 12,215,448 B2
Fiber assembly and method for producing fiber assembly
Taichi Nakamura, Osaka (JP); Norihito Tsukahara, Kyoto (JP); and Kouji Ikeda, Hyogo (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Filed on Mar. 22, 2022, as Appl. No. 17/700,961.
Claims priority of application No. 2021-073546 (JP), filed on Apr. 23, 2021.
Prior Publication US 2022/0341071 A1, Oct. 27, 2022
Int. Cl. D04H 3/04 (2012.01); D01D 5/08 (2006.01); D04H 3/005 (2012.01); D04H 3/14 (2012.01)
CPC D04H 3/04 (2013.01) [D01D 5/08 (2013.01); D04H 3/005 (2013.01); D04H 3/14 (2013.01); D10B 2321/121 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A fiber assembly comprising:
a support sheet;
a warp yarn group in which warp yarns including a polymer material are arranged; and
a weft yarn group in which weft yarns including a polymer material are arranged,
wherein:
a surface of the support sheet is release treated;
the warp yarn group is on the surface of the support sheet;
the weft yarn group is on the surface of the support sheet;
the warp yarn group and the weft yarn group define contact portion regions and non-contact portion regions;
in each of the contact portion regions, at least one of the warp yarns is integrated with at least one of the weft yarns;
each of the warp yarns has a line width of 1 μm to 10 μm, inclusive;
each of the weft yarns has a line width of 1 μm to 10 μm, inclusive;
at least one of the contact portion regions has a fiber density which is higher than a fiber density of at least one of the non-contact portion regions;
in at least one of the contact portion regions, two of the warp yarns or two of the weft yarns have a spacing of 5 μm or more and 1000 μm or less;
in at least one of the non-contact portion regions, two of the warp yarns or two of the weft yarns have a spacing of 2000 μm or more;
average diameters of portions other than a contact portion in which the at least one of the warp yarns is integrated with the at least one of the weft yarns, are defined as a and b respectively;
an average thickness t of the contact portion is 80% or less of a sum of (a+b); and
in a cross section of the contact portion, the weft yarns extend only in an upward direction above the warp yarns.