Title:
【発明の名称】複合繊維を用いたフィルターエレメント
Document Type and Number:
Japanese Patent JP2545265
Kind Code:
B2
Abstract:
Polyolefin/polyester composite fibres having a low apparent Young's modulus are produced by composite spinning a polyolefin as sheath component and a polyester as core component; stretching the resulting unstretched filaments to two or more times their original length at a temperature 20 DEG C or more above the secondary transition point of the polyester and below the melting point of the polyolefin; and annealing the resulting stretched filaments at a temperature 20 DEG C or more above the secondary transition point of the polyester and below the melting point of the polyolefin for 30 seconds or more, to give composite fibres having an apparent Young's modulus of 210 Kg/cm<2> or less. The fibres are used to make filter elements by winding them on to a core while heating them to the melt-adhesion temperatue of their sheath component; adjusting the void content to a desired rate; and cooling the remaining core.
Inventors:
GOI SHIGERU
MATSUDA HIDEO
NAKAZAWA KAZUYOSHI
MATSUDA HIDEO
NAKAZAWA KAZUYOSHI
Application Number:
JP6790388A
Publication Date:
October 16, 1996
Filing Date:
March 22, 1988
Export Citation:
Assignee:
CHISSO CORP
International Classes:
B01D39/16; D01F8/06; D01F8/14; D04H3/073; D04H3/147; D04H3/153; (IPC1-7): D01F8/14; B01D39/16; D04H3/07
Domestic Patent References:
| JP63282312A |
Attorney, Agent or Firm:
Katsuhiko Nonaka