Plastic and nonmetallic article shaping or treating: processes – Carbonizing to form article – Agglomeration or accretion
Patent
1983-02-09
1985-07-02
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
Carbonizing to form article
Agglomeration or accretion
264176F, 264DIG46, 4251746, B29F 308
Patent
active
045267359
ABSTRACT:
A process and apparatus for producing a fibrous assembly. At least one fiber-forming polymer is extruded through a spinneret having numerous small openings. The process uses a die equipped with a spinneret having numerous closely spaced small openings and an opening ratio (.alpha.) of at least 30%. At least one fiber-forming polymer in the form of a shaped mass having a specified compression resistance is continuously stuffed into said die. Said shaped mass has a shape such that it measures more in one direction than in another. There is passed through the spinneret an electric current sufficient to give said fiber-forming polymer Joule heat required for cutting said polymer by partitioning members defining the numerous small openings of the spinneret. The cut fiber-forming polymer is taken up as fine streams.
The present invention provides ultrathick aromatic polyamide fibers having an average cross-sectional area of about 0.01 mm.sup.2 to about 5 mm.sup.2 and comprising at least one fiber-forming aromatic polyamide and an inorganic or metallic fine powder or a fibrous material.
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Emi Shingo
Imoto Tadasi
Kiriyama Tsutomu
Norota Susumu
Segawa Yasuhiko
Teijin Limited
Thurlow Jeffery
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