MULTILAYER SHEET, HYGIENIC MASK AND METHOD FOR PRODUCING MULTILAYER SHEET

WIPO Patent Application WO/2022/215321

A1

The present invention provides a translucent multilayer sheet which is suitable for the achievement of a hygienic mask that has good air permeability and good visibility of facial expression of a wearer, while exhibiting good collection performance that is effective for prevention of spreading of airborne droplets. A multilayer sheet (S) according to the present invention is provided with: a sheet-like multilayer body (4) that is obtained by superposing a first base material layer (1), which is formed of a plurality of fibers that are at least thermoplastic, and a second base material layer (2), which is formed of a plurality of thermoplastic fibers that are finer than the fibers of the first base material layer (1), upon each other; and a plurality of melt solidified parts (5) which are formed across the sheet-like multilayer body (4) from the front surface to the back surface so that desired air permeability and transparency are obtained by regulating the respective areas occupied by the melt solidified parts and the area ratio of the sum of the areas occupied by the melt solidified parts to the area of the sheet-like multilayer body (4).

INOUE SHINSAKU (JP)
NAGAMINE KEI (JP)
ZAIMA TAKEYUKI (JP)
YOSHIDA SHOUHEI (JP)
SHIOMI KENTA (JP)

PCT/JP2022/002808

October 13, 2022

January 26, 2022

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SHINWA CORP (JP)

B32B5/26; B32B7/05

WO2014042253A1	2014-03-20
WO2011004696A1	2011-01-13

JP2020147890A	2020-09-17
JP2008169506A	2008-07-24
JP2009106468A	2009-05-21

OGASAWARA Yoshinori (JP)

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