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EP0132110A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Process for producing composite monofilaments

Assignee: JNC Corp
•
Filing: 1984-07-11
•
Granted: —
•
Expires: 2004-07-11
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Abstract

Abstract @ A process for producing a composite monofilament of sheath-and-core type having heat-adhesive properties, super- iorstrengths, no curl and no peeling of the composite components is provided, which process comprises subjecting a low melting polyolefin selected from high density polyethylene, linear chain, low density polyethylene, polypropylene (PP) of m.p. 135°C or lower, or mixture thereof, and a high melting PP of m.p. 150°C or higher, to a sheath-and-core type composite spinning using the former resin as the sheath component and the latter resin as the core component, into a composite monofilament, the melt flow index ratio of the former component to the latter being 1.5 - 7, and the composite ratio being 30: 70 to 60 : 40; and stretching the composite filament to 6 - 9 times.

Inventors

  • 👤 Masahiko Matsuno
  • 👤 Katsuhiro Shishikura
  • 👤 Kunio Gohda
  • 👤 Isao Fujimura
  • 👤 Taizoh Sugihara

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-10 01:05
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/28; D01D5/30; D01F; D01F8/00; D01F8/04; D01F8/06

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 149 words
A process for producing a composite monofilament having heat-adhesive properties and suprior strengths which comprises subjecting a low melting polyolefin resin selected from the group consisting of high density polyethylene, linear chain, low density polyethylene, polypropylene having a melting point of 135°C or lower and mixtures of the foregoing, and a high melting polypropylene having a melting point of 150°C or higher, to a sheath-and-core type composite spinning using the former low melting polyolefin resin as the sheath component and the latter high melting polypropylene as the core component, into an unstretched monofilament, the melt flow index ratio of the former low melting polyolefin resin component to the latter high melting polypropylene component being in the range of 1.5 to 7, and the composite ratio being in the range of 30 70 to 60 :40; and stretching the unstretched composite monofilament to 6 to 9 times the original length.
Claim 2
Dependent Claim 149 words
A process for producing a composite monofilament having heat-adhesive properties and suprior strengths which comprises subjecting a low melting polyolefin resin selected from the group consisting of high density polyethylene, linear chain, low density polyethylene, polypropylene having a melting point of 135°C or lower and mixtures of the foregoing, and a high melting polypropylene having a melting point of 150°C or higher, to a sheath-and-core type composite spinning using the former low melting polyolefin resin as the sheath component and the latter high melting polypropylene as the core component, into an unstretched monofilament, the melt flow index ratio of the former low melting polyolefin resin component to the latter high melting polypropylene component being in the range of 1.5 to 7, and the composite ratio being in the range of 30 70 to 60 :40; and stretching the unstretched composite monofilament to 6 to 9 times the original length.
Claim 3
Dependent Claim 20 words
A process according to claim 1, wherein the low melting polyolefin resin and/or the high melting polypropylene is a homopolymer.
Claim 4
Dependent Claim 22 words
A process according to claim 1 or 2, wherein the melting point of the low melting polyolefin resin is 80°C or higher.
Claim 5
Dependent Claim 20 words
A composite monofilament produced by a method according to any proceeding claim and having a thickness of 100 to 1000d.
Claim 6
Dependent Claim 10 words
A net made from composite monofilament according to claim 4.

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