Kureha Kagaku Kogyo Kabushiki Kaisha

Hiroshi Ohhira

Tohru Sasaki

Hiroyuki Endoh

Hiroyuki Endo

The invention provides improved composite and conjugate filaments to be used exclusively in in-water submerged purposes. Each of these filaments consists of a core of vinylidene fluoride resin consisting in turn of one or more filamentary element(s), while a sheath consists of polyamide resin. The composing ratio as measured between the cross-sections of these both resins is defined by a value extending from 1/99-to 40/60, preferably from 3/97 to 30/70, still more preferably between 3/97 and 20/80.

Composite and conjugate filaments

The invention resides in a strong conjugate composite yarn highly adapted for use as a fishing line. The core material is a polyolefin having double refrax .DELTA.n amounting to at least 30.times.10.sup.-3. The sheath material is a polyamide or a polyester. The both core and sheath components are highly stretched and oriented.

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Iwaki, Japan

Hiroshi Ohhira