High tenacity polyethylene yarn

• US 7,638,191 B2
• Filed: 06/08/2007
• Issued: 12/29/2009
• Est. Priority Date: 06/08/2007
• Status: Expired due to Fees

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Young, John A., Zhou, Qiang, Arnett, Charles R., Tam, Thomas Y-T., Twomey, Conor
• Primary Examiner(s): EDWARDS, NEWTON O
• Application Number:
  US11/811,570
• Publication Number:
  US 20080305331A1
• Time in Patent Office: 935 Days
• Field of Search: 428/364, 428/394
• US Class Current: 428/364
• CPC Class Codes: B29C 2948/9259 Angular velocity
• CPC Class Codes: B29C 2948/92952 Drive section, e.g. gearbox, motor or drive fluids
• CPC Class Codes: B29C 48/05 Filamentary, e.g. strands
• CPC Class Codes: B29C 48/405 Intermeshing co-rotating screws
• CPC Class Codes: B29K 2023/0683 UHMWPE, i.e. ultra high molecular weight polyethylene
• CPC Class Codes: D01D 1/02 Preparation of spinning solutions
• CPC Class Codes: D01D 5/06 Wet spinning methods D01D5/0046 takes precedence
• CPC Class Codes: D01F 1/10 Other agents for modifying properties
• CPC Class Codes: D01F 6/04 from polyolefins
• CPC Class Codes: Y10T 428/2913 Rod, strand, filament or fiber
• CPC Class Codes: Y10T 428/2931 Fibers or filaments nonconcentric [e.g., side-by-side or eccentric, etc.]
• CPC Class Codes: Y10T 428/2967 Synthetic resin or polymer

Abstract

A process for preparing ultra-high molecular weight polyethylene (UHMWPE) multi-filament yarns having improved tensile properties and the yarns and articles thereby produced.

Claims

1. A high strength UHMWPE multi-filament yarn comprising at least about 100 filaments having a tenacity of at least about 40 g/d and an intrinsic viscosity less than or equal to about 16 dl/g and having infra-red absorbance ratios satisfying the following relationships:

0.84≧

A₁₇₂₀/A₂₀₁₇≧

0.77

0.77≧

A₉₀₁/A₂₀₁₇≧

0.71

where A_x is the infra-red absorbance at x cm<sup>−

1</sup>.

2. A high strength UHMWPE multi-filament yarn comprising at least about 100 filaments having a tenacity of at least about 40 g/d and an intrinsic viscosity less than or equal to about 16 dl/g, wherein said yarn has an infra-red absorbance ratio of A₁₇₂₀/A₉₁₀ less than or equal to about 1.07, where A_x is the infra-red absorbance at x cm⁻

1.

3. A high strength UHMWPE multi-filament yarn comprising at least about 100 filaments having a tenacity of at least about 45 g/d and an intrinsic viscosity less than or equal to about 16 dl/g and having infra-red absorbance ratios satisfying the following relationships:

0.84≧

A₁₇₂₀/A₂₀₁₇≧

0.77

0.77≧

A₉₀₁/A₂₀₁₇≧

0.71

where A_x is the infra-red absorbance at x cm<sup>−

1</sup>.

4. A high strength UHMWPE multi-filament yarn comprising at least about 100 filaments having a tenacity of at least about 45 g/d and an intrinsic viscosity less than or equal to about 16 dl/g, and having an infra-red absorbance ratio of A₁₇₂₀/A₉₁₀ less than or equal to about 1.07, where A_x is the infra-red absorbance at x cm⁻

1.