Abrasion resistant cords and ropes

a technology of abrasion resistance and rope, which is applied in the direction of cables, insulated conductors, braids, etc., can solve the problems of reducing the abrasion resistance the uv degradation of the rope fiber, and the bending of the aromatic polyamide, so as to improve the abrasion resistance and reduce the volume

Inactive Publication Date: 2015-05-14
POLTECO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0017]The present invention responds to the above need by providing a covering device or a covering material...

Problems solved by technology

However, these commonly used rope fibers also have certain disadvantages that are associated with their particular chemical structures.
Polyamides and to a lesser extent polyesters absorb water, polyamides and polypropylene are susceptible to UV degradation, and aromatic polyamides are susceptible to fatigue bending.
As a result they are very weak in their lateral directions perpendicular to their axis.
Because of the very weak lateral bonding between the filaments of multifilament fibers, when ropes made of multifilament fibers are rubbed against other materials encountered during their use, for example, rocks, stones, cement, and salt crystals, their filaments shred and break down into weaker microfilaments, a process that leads to the weakening and destruction of the rope.
The greater the deg...

Method used

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  • Abrasion resistant cords and ropes
  • Abrasion resistant cords and ropes
  • Abrasion resistant cords and ropes

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0097]Example 1. In one experiment a rope was made with a protective braided layer of UHMWPE unitary tapes (0.05 mm thick and 3.4 mm) wide on a core of braided high strength UHMWPE fibers having a diameter of 0.375 in. The weight of the protective UHMWPE braided construction was 10% of the total rope weight. The outside protective braiding of the UHMWPE unitary tapes was braided tightly on the core of the rope and had the same diameter as the core component. Samples of the rope were tested for their abrasion resistance in comparison to the braided core of high strength UHMWPE fibers for the same length of time, for example, 10 hours. The abrasive material had a surface roughness of 68 micrometers. The rope samples were held under tension against the abrasive material that came in contact with the rope samples with a periodicity of 60 cycles / minute.

[0098]The abrasion resistance of the samples was assessed by the weight loss of the rope, the amount of dust trail of worn material on th...

example 2

[0100]A braid construction with the unitary UHMWPE tape of this invention (0.05 mm thick and 3.0 mm wide) was used as an outside layer to a high strength core component of braided aromatic polyamide (Kevlar®) fibers having a diameter of 0.5 in (12.7 mm). The UHMWPE tapes were braided snugly over the Kevlar® core component. The resultant rope product had a diameter 0.33 in (8.38 mm), was firm and looked like a wire cable.

[0101]With the strength of the Kevlar® core unchanged, the rope product featured the combined properties of the excellent mechanical properties of Kevlar® in terms of breaking strength, low extension and negligible creep with the superior abrasion wear resistance of the exterior UHMWPE braided component that Kevlar® lacks.

example 3

[0102]A braid of unitary UHMWPE tapes of this invention (0.05 mm thick and 3.0 mm wide) was used over a 0.5 in. (12.7 mm) double braided Nylon rope construction. The weight fraction of the UHMWPE exterior component was approximately 9% of the total rope weight. The combination of the UHMWPE braided structure of this application over the double braided nylon allowed the production of a floating rope featuring the good shock absorbing characteristics and high elongation of the nylon core with the superior abrasion resistance, excellent UV resistance and non-water absorption behavior of UHMWPE. The weight of the protective UHMWPE braided construction was 9% of the total rope weight. The outside protective braiding of the UHMWPE unitary tapes was braided tightly on the double braided nylon rope, and had the same diameter as the double braided Nylon rope before braiding it with the UHMWPE unitary tapes. Samples of the rope were tested for their abrasion resistance in comparison to the do...

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Abstract

The abrasion resistance of organic fiber based ropes and cords is increased by a outer woven cover of tapes of high molecular weight and more preferably ultrahigh molecular weight polyethylene

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]The present application is a Continuation of and claims the benefit of priority to the US Non-provisional patent application having the same title and application Ser. No. 13 / 095,166, that was filed on 27 Apr. 2011, which is incorporated herein by reference, which is a Continuation-In-Part of and claims the benefit of priority to the US Non-provisional patent application having the same title and application Ser. No. 12 / 579,344 that was filed on Oct. 14, 2009, which is incorporated herein by reference.[0002]The present application claims the benefit of priority to the US provisional patent application of the same title having application Ser. No. 61 / 107,864 that was filed on Oct. 23, 2008, which is incorporated herein by reference.[0003]The present application also claims the benefit of priority to the US provisional patent application of the same title having application Ser. No. 61 / 218,875 that was filed on Jul. 19, 2009, which is incor...

Claims

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Application Information

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IPC IPC(8): D04C1/12D07B1/04D04C1/02D07B1/02
CPCD04C1/12D04C1/02D07B1/04D07B1/025A63B29/028B32B5/26B32B27/02B32B27/32D07B1/0673D07B1/147D07B1/20H01B7/182D07B2201/1096D07B2201/2003D07B2201/209D07B2201/2092D07B2205/201D07B2205/2014D07B2205/2046D07B2205/205D07B2401/2075D07B2501/2038D07B2501/2061D07B2501/2069D07B2501/2092Y10T156/10Y10T428/2933Y10T428/2967Y10T428/249922B32B5/024B32B2260/023B32B2260/046B32B2262/0253B32B2262/0261B32B2262/0276B32B2307/51B32B2307/516B32B2307/54B32B2307/56D07B2801/10D07B2801/22D07B2801/12D07B2801/24
Inventor ZACHARIADES, NINAZACHARIADES, DIMITRIS J.ZACHARIADES, ANAGNOSTIS E.
Owner POLTECO
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