Sheet-like article

Patent metadata

Field	Value
Publication number	US-2016289890-A1
Application number	US-201415037892-A
Country	US
Kind code	A1
Filing date	Nov 14, 2014
Priority date	Nov 21, 2013
Publication date	Oct 6, 2016
Grant date	—

Abstract

The invention provides a sheet-like article including: a fibrous base including ultrafine fibers; and a polyurethane resin as a binder to the fibrous base, wherein the polyurethane resin includes a polymer polyol-derived structure that includes a polycarbonate polyol-derived structure, and the polyurethane resin satisfies the following (I), (II) and (III) or (IV): (I) the polyurethane resin includes a carbonate bond, and an ether bond and/or an ester bond in the molecule; (II) the total content of urethane group and urea group in the polyurethane resin is 7 to 11% by mass; and (III) 80 to 100% by mass of a polycarbonate polyol yielding the polycarbonate polyol-derived structure is a polycarbonate polyol having a melting point of 20° C. or lower; or (IV) 80 to 100% by mass of a polycarbonate polyol yielding the polycarbonate polyol-derived structure is a polycarbonate polyol copolymerized with two or more polyhydric alcohols having different carbon skeletons.

First claim

1 . A sheet-like article comprising:
a fibrous base comprising ultrafine fibers; and a polyurethane resin as a binder to said fibrous base, wherein, said polyurethane resin comprises a polymer polyol-derived structure that comprises a polycarbonate polyol-derived structure, and said polyurethane resin satisfies the following (I) to (III): (I) said polyurethane resin comprises a carbonate bond, and an ether bond and/or an ester bond in the molecule; (II) the total content of urethane group and urea group in said polyurethane resin is 7 to 11% by mass; and (III) 80 to 100% by mass of a polycarbonate polyol yielding said polycarbonate polyol-derived structure is a polycarbonate polyol having a melting point of 20° C. or lower.

2 . A sheet-like article comprising:
a fibrous base comprising ultrafine fibers; and a polyurethane resin as a binder to said fibrous base, wherein, said polyurethane resin comprises a polymer polyol-derived structure that comprises a polycarbonate polyol-derived structure, and said polyurethane resin satisfies the following (I), (II) and (IV): (I) said polyurethane resin comprises a carbonate bond, and an ether bond and/or an ester bond in the molecule; (II) the total content of urethane group and urea group in said polyurethane resin is 7 to 11% by mass; and (IV) 80 to 100% by mass of a polycarbonate polyol yielding said polycarbonate polyol-derived structure is a polycarbonate polyol copolymerized with two or more polyhydric alcohols having different carbon skeletons.

3 . The sheet-like article according to claim 2 , wherein said polycarbonate polyol copolymerized with two or more polyhydric alcohols having different carbon skeletons has a melting point of 20° C. or lower.

4 . The sheet-like article according to claim 1 , which has a compression ratio of 13 to 20% and a compressive elastic modulus of 55 to 75%.

5 . The sheet-like article according to claim 1 , wherein 20 to 90% by mass of said polymer polyol-derived structure contained in said polyurethane resin is derived from a polycarbonate polyol.

6 . The sheet-like article according to claim 1 , wherein 20 to 80% by mass of said polymer polyol-derived structure contained in said polyurethane resin is derived from a polycarbonate polyol.

7 . The sheet-like article according to claim 1 , wherein said polymer polyol-derived structure contained in said polyurethane resin comprises structures derived from a polycarbonate polyol and a polyether polyol;

8 . The sheet-like article according to claim 1 , wherein said binder further comprises an anionic emulsifying agent and/or a cationic emulsifying agent.

9 . The sheet-like article according to claim 1 , wherein a film of said polyurethane resin has a storage elastic modulus of 1 to 70 MPa and a tan δ value of 0.05 to 0.30 at 20° C.

10 . The sheet-like article according to claim 1 , wherein said polycarbonate polyol having a melting point of 20° C. or lower or said polycarbonate polyol copolymerized with two or more polyhydric alcohols having different carbon skeletons, which constitutes said polyurethane resin, has a viscosity of 10,000 to 50,000 mPa·s at 40° C.

11 . The sheet-like article according to claim 1 , wherein said polycarbonate polyol copolymerized with two or more polyhydric alcohols having different carbon skeletons has a melting point of 20° C. or lower.

12 . The sheet-like article according to claim 1 , which has a compression ratio of 13 to 20% and a compressive elastic modulus of 55 to 75%.

13 . The sheet-like article according to claim 1 , wherein 20 to 90% by mass of said polymer polyol-derived structure contained in said polyurethane resin is derived from a polycarbonate polyol.

14 . The sheet-like article according to claim 1 , wherein 20 to 80% by mass of said polymer polyol-derived structure contained in said polyurethane resin is derived from a polycarbonate polyol.

15 . The sheet-like article according to claim 1 , wherein said polymer polyol-derived structure contained in said polyurethane resin comprises structures derived from a polycarbonate polyol and a polyether polyol.

16 . The sheet-like article according to claim 1 , wherein said binder further comprises an anionic emulsifying agent and/or a cationic emulsifying agent.

17 . The sheet-like article according to claim 1 , wherein a film of said polyurethane resin has a storage elastic modulus of 1 to 70 MPa and a tan δ value of 0.05 to 0.30 at 20° C.

18 . The sheet-like article according to claim 1 , wherein said polycarbonate polyol having a melting point of 20° C. or lower or said polycarbonate polyol copolymerized with two or more polyhydric alcohols having different carbon skeletons, which constitutes said polyurethane resin, has a viscosity of 10,000 to 50,000 mPa·s at 40° C.

19 . The sheet-like article according to claim 2 , wherein said polycarbonate polyol copolymerized with two or more polyhydric alcohols having different carbon skeletons has a melting point of 20° C. or lower.

20 . The sheet-like article according to claim 2 , which has a compression ratio of 13 to 20% and a compressive elastic modulus of 55 to 75%.

21 . The sheet-like article according to claim 2 , wherein 20 to 90% by mass of said polymer polyol-derived structure contained in said polyurethane resin is derived from a polycarbonate polyol.

22 . The sheet-like article according to claim 2 , wherein 20 to 80% by mass of said polymer polyol-derived structure contained in said polyurethane resin is derived from a polycarbonate polyol.

23 . The sheet-like article according to claim 2 , wherein said polymer polyol-derived structure contained in said polyurethane resin comprises structures derived from a polycarbonate polyol and a polyether polyol.

24 . The sheet-like article according to claim 2 , wherein said binder further comprises an anionic emulsifying agent and/or a cationic emulsifying agent.

25 . The sheet-like article according to claim 2 , wherein a film of said polyurethane resin has a storage elastic modulus of 1 to 70 MPa and a tan δ value of 0.05 to 0.30 at 20° C.

26 . The sheet-like article according to claim 2 , wherein said polycarbonate polyol having a melting point of 20° C. or lower or said polycarbonate polyol copolymerized with two or more polyhydric alcohols having different carbon skeletons, which constitutes said polyurethane resin, has a viscosity of 10,000 to 50,000 mPa·s at 40° C.

Assignees

• Toray Industries

Inventors

• Murahara Hisashi
• Nakai Shunichiro
• Matsuzaki Yukihire
• Nishimura Makoto

Classifications

• C08G18/44 Primary

  Polycarbonates · CPC title

• C08G18/7671

  containing only one alkylene bisphenyl group · CPC title

• B32B5/024

  Woven fabric · CPC title

• D04H1/587

  characterised by the bonding agents used · CPC title

• D06M2101/20

  Polyalkenes, polymers or copolymers of compounds with alkenyl groups bonded to aromatic groups · CPC title