Thermal bond non-woven fabric containing cyclic olefin resin

Patent metadata

Field	Value
Publication number	US-2018105964-A1
Application number	US-201615567710-A
Country	US
Kind code	A1
Filing date	May 10, 2016
Priority date	Jun 3, 2015
Publication date	Apr 19, 2018
Grant date	—

Abstract

A non-woven fabric that absorbs only a small amount of volatile low molecular weight compound, and that has good texture when used as a non-woven fabric that makes contact with human skin. This thermal bond non-woven fabric containing cyclic olefin resin includes at least: fibers (A) containing at least 50 mass % of a cyclic olefin resin (A1) having a glass transition temperature Tg A1 ° C.; and fibers (B) containing at least 10 mass % of either a cyclic olefin resin (B1) having a glass transition temperature Tg B1 ° C., or a crystalline thermoplastic resin (B2) having a melting point Mp B2 ° C.; the fibers (A) and the fibers (B) being heat-spliced together; wherein Tg A1 >Tg B1 or Tg A1 >Mp B2 , and either the difference between the glass transition temperature Tg A1 ° C. and the glass transition temperature TgB1° C. or the difference between the glass transition temperature Tg A1 ° C. and the melting point Mp B2 ° C. exceeds 20° C.

First claim

1 . A cyclic olefin-based resin-containing thermal bond non-woven fabric comprising at least a fiber (A) comprising no less than 50 mass % of a cyclic olefin-based resin (A1) having a glass transition point Tg A1 ° C.,
a fiber (B) comprising no less than 10 mass % of a cyclic olefin-based resin (B1) having a glass transition point Tb B1 ° C., or a crystalline thermoplastic resin (B2) having a melting point Mp B2 ° C., wherein
the fiber (A) and the fiber (B) are thermally fused,
Tg A1 >Tg B1 , or Tg A1 >MP B2 ,
a difference between the glass transition point Tg A1 ° C. and the glass transition point Tg B1 ° C., or the difference between the glass transition point Tg A1 ° C. and the melting point Mp B2 ° C. exceeds 20° C.

2 . The cyclic olefin-based resin-containing thermal bond non-woven fabric according to claim 1 , wherein the fiber (B) comprises no less than 10 mass % of the cyclic olefin-based resin (B1) having a glass transition point Tb B1 ° C.

3 . The cyclic olefin-based resin-containing thermal bond non-woven fabric according to claim 1 , wherein the fiber (A) and the fiber (B) are short fibers having a length of 0.2 mm to 10 mm.

4 . The cyclic olefin-based resin-containing thermal bond non-woven fabric according to claim 1 , formed by a wet method.

5 . The cyclic olefin-based resin-containing thermal bond non-woven fabric according to claim 1 , wherein the cyclic olefin-based resin-containing thermal bond non-woven fabric is a substrate of a patch.

Assignees

• Polyplastics Co

Inventors

• Okawa Hidetoshi

Classifications

• D10B2509/00

  Medical; Hygiene · CPC title

• D10B2401/041

  thermoplastic; thermosetting · CPC title

• D04H3/16

  with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion · CPC title

• D04H3/153

  Mixed yarns or filaments · CPC title

• A61K47/32

  Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. carbomers {, poly(meth)acrylates, or polyvinyl pyrrolidone} · CPC title