Spinnerette assembly for forming multicomponent hollow fibers

A spinnerette assembly for forming one or more multiple-sheath composite hollow fibers comprising:

• a unitary spinnerette body,
• at least one extrusion orifice formed in said unitary spinnerette body;
• a hollow needle being affixed in a needle mounting hole formed in said unitary spinnerette body and wherein said needle mounting hole receives a portion of said needle,
• said hollow needle extending through each said at least one extrusion orifice in a concentric manner to define at least one annular passage around said needle in said at least one extrusion orifice;
• a bore forming fluid passage formed in said unitary spinnerette body, said bore forming fluid passage communicating with the interior of each said needle;
• at least one core forming material passage formed in said unitary spinnerette body, wherein each said at least one core forming material passage comprises a core forming material inlet port extending from a surface of said unitary spinnerette body to an interior of said unitary spinnerette body and at least one transverse passage extending from said core forming material port to each said at least one annular passage;
• and
• a first sheath forming material passage, wherein said first sheath forming material passage comprises a first sheath forming material port extending from a surface of said unitary spinnerette body to each said at least one annular passage
• a second sheath forming material passage, wherein said second sheath forming material passage comprises a second sheath forming material port extending from a surface of said spinnerette assembly to each said annular passage.