Polyurethane fiber and spinneret therefor and manufacturing method thereof

A spinneret suitable for manufacturing a polyurethane fiber, comprising:

• a spinneret body having a first surface and a second surface opposite to each other;
• and
• at least one spinneret orifice unit embedded in the spinneret body, the spinneret orifice unit including a plurality of spinneret sub-orifices, each spinneret sub-orifice penetrating through the spinneret body, two ends of each spinneret sub-orifice being connected to the first surface and the second surface respectively, each spinneret sub-orifice having a sub-orifice diameter ranging from 0.07 mm to 0.12 mm, and having a sticking space between every two adjacent spinneret sub-orifices ranging from 0.01 mm to 0.05 mm.

A polyurethane fiber, comprising:

• a plurality of sub-fiber parts being arranged in parallel;
• and
• a plurality of sticking parts, each sticking part being positioned between every two adjacent sub-fiber parts and connecting the two adjacent sub-fiber parts, each sub-fiber part having a sub-fiber diameter ranging from 0.07 mm to 0.12 mm, and each sticking part having a sticking width ranging from 0.01 mm to 0.05 mm.