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Rope Specifications
Rope, Cordage Construction & Fiber

Construction Characteristics

Solid Braids Constructed to maintain size & roundness by resisting rotation overpulleys and under loads. Solid Braids are manufactured on 9, 12, 18 or 20 strand braiders, depending on upon the size of the cord. Many solid braids are reinforced with strands of a synthetic fiber used as a core for increasing strength and durability.

Diamond Braids Constructed in a maypole over and under braid in 8, 12 & 16 strand. Available in a traditional 8 strand braid and smooth braid.

Double Braids Double Braided Ropes Consist of a braided cover over a braided core.Cover will have from 16 to 32 strands singly or in pairs. Cover and core share load equally in balanced construction. Cover to core fiber ration is usually 1 to 1.
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Double Braid Spec     Nylon    Polyester


Fiber Characteristics

Nylon Offers high tensile strength, high elasticity, energy absorption & impact resistance, high melting point (480?)

Polyester Offers high tensile strength, low elastic elongation, high melting point (480?) and good abrasion resistance.

Polypropylene (Multifilament) Soft and flexible and has the feel of nylon. Strength is about ½ of nylon with a low melting point (330?). A light weight fiber with a high positive buoyancy which allows it to float.

Polyethylene Similar to Polypropylene fiber, retains memory and slicker than polypropylene. Has better UV protection. Heavier than Polypropylene and offers more abrasion resistance. It also has a high buoyancy, which allows it to float.

Cotton Offers wicking ability, soft non-scouring surface and superior knot retention. We offer a 100% cotton cover and core.. both glazed and unglazed. We also offer a number of grades of the more traditional sash cord in a solid braid with a reinforced synthetic core.

CORDAGE FIBER PROPERTIES - TYPICAL VALUES                               Cordage Institute
Manila Sisal Cotton Nylon Polyester Polypropylene Polyethylene Aramid Extended Chain P/E
Strength:
Breaking Tenacity - dry (grams/denier)  5-6.0 4-50 2 - 3.0 7.8-10.4 7.0-9.5 6.5 6 18-26.5 30/35
Wet Strength vs. Dry Strength Up to 120% Up to 120% Up to 120% 85-90% 100% 100% 105% 95% 100%
Shock-load Absorption Ability Poor Poor Poor Excellent Very Good Very Good Fair Fair  Fair
WEIGHT:
WEIGHT:Specific Gravity 1.38 1.38 1.54 1.14 1.38 0.91 0.95 1.44 0.97
Floats No No No No No Yes Yes No Yes
ELONGATION:
Percent at Break 10-12% 10-12% 5-12% 15-28% 12-15% 18-22% 20-24% 1.5-3.6% 2.7-3.5
Creep (extension under sustained load) Very Low Very Low   Moderate Low High High Very Low Moderate
EFFECTS OF MOISTURE:
Water Absorp. of Individual Fibers Up to 100% Up to 100% Up to 100% 2-8% <1.0% None None 3.5-7.0% None
Resistance to Rot, mildew & deterioration due to marine organisms Poor Very Poor Very Poor Excellent Excellent Excellent Excellent Excellent Excellent
DEGRADATION:
Resistance to UV in sunlight Good Good Good Good Best Fair Fair Fair Fair
Resistance to aging for properely stored rope Good Good Good Excellent Best Black is best Excellent Black is best Excellent Excellent Excellent
ROPE ABRASION RESISTANCE:
Surface Good Fair Poor Very Good Excellent Good Fair Fair Very Good
Internal Good Good Good Excellent Excellent Good Good Good Excellent
THERMAL PROPERTIES:
High Temp. working limit 300° 300° 300° 250° 275° 200° 150° 350° 150°
Low Temp. Work limit -100° -100° -100° -70° -100° -20° -100° -100° -200°
Melts at     Chars 300° 420°-480° 490°-500° 330° 285° 800° Begins to decompose 297°

 

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Call 239-352-3083 today for more information & to place orders!
or email us at gpj@gpjrope.com


239-352-3083
Fax: 1-800-806-6204

411 Logan Blvd. N.
Naples, FL 34119 USA