Polyethylene terephthalate filament having high tenacity for industrial use

• US 20070243378A1
• Filed: 05/15/2006
• Published: 10/18/2007
• Est. Priority Date: 04/14/2006
• Status: Abandoned Application

• Current Assignee: Hyosung Corporation
• Original Assignee: Hyosung Corporation
• Inventors: Han, Kyu-Chan, Shim, Dong-Seok, Cho, Dae-Hwan
• Application Number:
  US11/433,532
• Publication Number:
  US 20070243378A1
• Time in Patent Office: Days
• US Class Current: 428/375
• CPC Class Codes: D01D 5/084 Heating filaments, threads or the like, leaving the spinnerettes
• CPC Class Codes: D01D 5/16 using rollers, or like mechanical devices, e.g. snubbing pins
• CPC Class Codes: D01F 6/62 from polyesters
• CPC Class Codes: Y10T 428/2913 Rod, strand, filament or fiber
• CPC Class Codes: Y10T 428/2933 Coated or with bond, impregnation or core
• CPC Class Codes: Y10T 428/2969 Polyamide, polyimide or polyester

Abstract

A polyethylene terephthalate monofilament obtained by spinning a polyethylene terephthalate chip having an intrinsic viscosity of 0.8 to 1.3, which gives a stress-strain curve exhibiting an elongation of less than 2.5% at an initial stress of 2.0 g/d, with an initial modulus value of 80 to 160 g/d, an elongation of 7.5% or less in a stress range of from 2.0 g/d to 9.0 g/d, and an elongation of at least 2.0% or more in a stress range of from 10.0 g/d to the point of break, is provided.

Claims

1. A polyethylene terephthalate monofilament, which is obtained by spinning a polyethylene terephthalate chip having an intrinsic viscosity of 0.8 to 1.3,

wherein the polyethylene terephthalate monofilament gives a stress-strain curve exhibiting an elongation of less than 2.5% at an initial stress of 2.0 g/d, with an initial modulus value of 80 to 160 g/d, an elongation of 7.5% or less in a stress range of from 2.0 g/d to 9.0 g/d, and an elongation of at least 2.0% or more in a stress range of from 10.0 g/d to the point of break.

2. The polyethylene terephthalate monofilament according to claim 1, wherein the linear density of the polyethylene terephthalate is 3 to 30 denier.

3. A polyethylene terephthalate multifilament, which is obtained by aggregating 50 to 40,000 polyethylene terephthalate monofilaments according to claim 1.

4. The polyethylene terephthalate multifilament according to claim 3, which is obtained by aggregating 192 or 384 polyethylene terephthalate monofilaments.

5. The polyethylene terephthalate multifilament according to claim 3, wherein the strength of the polyethylene terephthalate multifilament has a stress of 10 to 13 g/d.

6. The polyethylene terephthalate multifilament according to claim 3, wherein the elongation at break of the polyethylene terephthalate multifilament is 9.5 to 13.5%.

7. An industrial product selected from the group consisting of industrial rope, reinforcement material for construction, webbing and seatbelt, all of which comprise the polyethylene terephthalate multifilament according to claim 3.