(19)
(11) EP 0 260 974 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
24.05.1989 Bulletin 1989/21

(43) Date of publication A2:
23.03.1988 Bulletin 1988/12

(21) Application number: 87308249.9

(22) Date of filing: 17.09.1987
(51) International Patent Classification (IPC)4D01F 6/46, D01F 8/06
(84) Designated Contracting States:
AT BE DE ES FR GB IT NL SE

(30) Priority: 19.09.1986 US 909345
24.12.1986 US 946562
04.02.1987 US 10651
12.02.1987 US 13853

(71) Applicant: THE DOW CHEMICAL COMPANY
Midland Michigan 48640-1967 (US)

(72) Inventors:
  • Jezic, Zdravko
    Lake Jackson Texas 77566 (US)
  • Young, Gene P.
    Lake Jackson Texas 77566 (US)

(74) Representative: Burford, Anthony Frederick et al
W.H. Beck, Greener & Co. 7 Stone Buildings Lincoln's Inn
London WC2A 3SZ
London WC2A 3SZ (GB)


(56) References cited: : 
   
       


    (54) Biconstituent polypropylene/polyethylene fibers


    (57) Biconstituent fibers consist essentially of polypropylene as a continuous phase having distributed therein 20 to 45 weight percent of linear low density polyethylene (LLDPE) fibrils as a dispersed phase arrayed in a substantially omni-directional splayed manner. The LLDPE has a melt flow rate of 12 to 120 g/10 mins (ASTM) and preferably a density of 0.92 to 0.94 g/cm³. The preferred alkylene comonomers of the LLDPE have 4 to 8 carbon atoms, especially 1-octene in an amount of 5 to 10 percent. Fibers of deniers below 30, preferably below 15, can be obtained and have improved tenacity and hand as compared to polypropylene fibers.





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