Importance

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Abstract

A polyurethane fiber and a manufacturing method thereof are provided. The manufacturing method includes the following steps. A polyurethane material is provided. Then a melt extrusion process is carried out on the polyurethane material through a spinneret. The spinneret includes at least one spinneret orifice unit embedded in a spinneret body. Wherein, the spinneret orifice unit includes a plurality of spinneret sub-orifices, and each spinneret sub-orifice penetrates through the spinneret body. Each spinneret sub-orifice has a sub-orifice diameter ranging from 0.07 mm to 0.12 mm, and there is a sticking space between every two adjacent spinneret sub-orifices ranging from 0.01 mm to 0.05 mm. Then the polyurethane material passes through the spinneret sub-orifices and is sticked together to form the polyurethane fiber.

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First Claim