Kaneka Corporation

Tokyo Institute of Technology

Mitsui Chemicals, Inc.

Wataru Takarada

Takeshi Kikutani

Noriyuki Suzuki

Tetsuya Minami

Takahiko Sugaya

Ryuji Fukuda

Sarah Siti

Kozo Iiba

Sho Hatano

A nonwoven fabric, including fibers, in which the fibers have an elongational viscosity, as measured under conditions at an elongational strain rate of 2.5&#xd7;10(1/s) and a temperature of 160&#xb0; C., of from 430 Pa&#xb7;s to 1200 Pa&#xb7;s, and a ratio of the elongational viscosity (Pa&#xb7;s) to a shear viscosity (Pa&#xb7;s) of the fiber, as measured under conditions at a shear strain rate of 2.5&#xd7;10(1/s) and a temperature of 160&#xb0; C., is from 35 to 65.

Nonwoven fabric and filter

An objective is to improve the spinnability and the productivity and increase the tensile strength of a polyester fiber containing polyhydroxyalkanoate. Disclosed is a biodegradable aliphatic polyester fiber containing a polyhydroxyalkanoate, a nucleating agent, and a lubricant, wherein the nucleating agent contains pentaerythritol, and the lubricant contains at least one of behenic amide, stearic acid amide, erucamide, oleic amide, and a combination thereof.

Biodegradable aliphatic polyester fiber and method for producing the same

An object of the present invention is to improve spinnability, productivity, and tensile strength of a polyester fiber containing poly(3-hydroxybutyrate-co-3-hydroxyhexanoate). By spinning the polyester resin containing the poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) at a high spinning velocity, the spinnability, productivity, and tensile strength of the polyester fiber can be improved.

Polyester fiber

Growing community of inventors

Meguro-ku, Japan

Wataru Takarada