Fiber Properties – Phoenix Rope & Cordage

Fiber Properties

ARAMID (Kevlar)

Breaking Strength (Grams per Denier)

21.7gpd

Specific Gravity

1.44

Stretch Elongation at Break Point

2.5%

Elastic Recovery

100%

Moisture Absorbancy

4.5%

Effect of Heat

Decomposes at 930° F

Effect of Acids

Resists most acids. Some strength lost after long exposure.

Effect of Alkalis

Generally good resistance.

Effect of Organic Solvents

Unaffected. Should not be bleached.

Effect of Sunlight

Loses strength after prolonged exposure.

Effect of Age

Excellent resistance.

Resistance to Mildew

Not attacked.

Abrasion Resistance

Good

Identification

Does not melt. Decomposes at 930° F

COTTON (Spur Yarn)

Breaking Strength (Grams per Denier)

3 to 5gpd

Specific Gravity

1.54

Stretch Elongation at Break Point

3 to 7%

Elastic Recovery

74 at 2%

45 at 5%

Moisture Absorbancy

24 to 27%

Effect of Heat

Decomposes at 302° F

Effect of Acids

Disintegrates in concentrated solutions.

Effect of Alkalis

Swelling, bit no damage.

Effect of Organic Solvents

Resistant to common solvents.

Effect of Sunlight

Loses strength.

Effect of Age

Negligible

Resistance to Mildew

Poor unless bleached.

Abrasion Resistance

Good resistance.

Identification

Burns rapidly.

GLASS (Fiberglass)

Breaking Strength (Grams per Denier)

9.6gpd

Specific Gravity

2.5

Stretch Elongation at Break Point

3.1%

Elastic Recovery

100%

Moisture Absorbancy

None

Effect of Heat

75% Tensile at 65° F. Melts at 2050° F.

Effect of Acids

Resists most acids.

Effect of Alkalis

Unaffected

Effect of Organic Solvents

Unaffected

Effect of Sunlight

Excellent resistance.

Effect of Age

Excellent resistance.

Resistance to Mildew

Not attacked.

Abrasion Resistance

Good

Identification

Does not burn. Melts at 2050° F.

MANILA (Natural Fiber)

Breaking Strength (Grams per Denier)

5 to 7gpd

Specific Gravity

1.5 to 1.6

Stretch Elongation at Break Point

5 to 13%

Elastic Recovery

75 at 2%

Moisture Absorbancy

30 to 35%

Effect of Heat

Loses strength over 180° F

Effect of Acids

Disintegrates.Very poor.

Effect of Alkalis

Very poor.

Effect of Organic Solvents

Poor resistance.

Effect of Sunlight

Loses some strength

Effect of Age

Negligible

Resistance to Mildew

Poor

Abrasion Resistance

Good

Identification

Burns like wood, hairy fibers.

NYLON (Multifilament)

Breaking Strength (Grams per Denier)

5.7 to 9.5gpd

Specific Gravity

1.14

Stretch Elongation at Break Point

15 to 28%

Elastic Recovery

99 at 5%

89 at 8%

Moisture Absorbancy

4.2 to 8%

Effect of Heat

Yellow at 300° F

Melts at 480° F

Effect of Acids

Good resistance. Dissolves in sulfuric acid.

Effect of Alkalis

Inert

Effect of Organic Solvents

Resistant. Soluble in phenolic and formic acid.

Effect of Sunlight

Loses strength after prolong exposure.

Effect of Age

None

Resistance to Mildew

Not attacked.

Abrasion Resistance

Excellent resistance

Identification

Melts before burning. Forms hard bead. Celery odor.

POLYESTER (Multifilament)

Breaking Strength (Grams per Denier)

6 to 9.5gpd

Specific Gravity

1.38

Stretch Elongation at Break Point

12 to 14%

Elastic Recovery

99 at 2%

88 at 5%

Moisture Absorbancy

0.4%

Effect of Heat

Melts at 482° F

Effect of Acids

Good resistance. Dissolves in sulfuric acid.

Effect of Alkalis

Moderate

Effect of Organic Solvents

Resistant. Soluble in phenolic acid.

Effect of Sunlight

Loses strength after prolonged exposure.

Effect of Age

None

Resistance to Mildew

Not attacked.

Abrasion Resistance

Excellent resistance

Identification

Melts before burning. Forms hard bead. Pungent odor.

POLYPROPYLENE (Monofilament)

Breaking Strength (Grams per Denier)

3.5 to 7gpd

Specific Gravity

0.91 (floats)

Stretch Elongation at Break Point

14 to 30%

Elastic Recovery

98 at 5%

Moisture Absorbancy

Negligible

Effect of Heat

50% Tensile at 200° F

Melts at 330° F

Effect of Acids

Good resistance except with oxidizing agents.

Effect of Alkalis

Good resistance.

Effect of Organic Solvents

Insoluble in most except chlorinated hydrocarbons.

Effect of Sunlight

Good resistance if UV-stabilized.

Effect of Age

Negligible

Resistance to Mildew

Not attacked.

Abrasion Resistance

Good resistance.

Identification

Floats. Melts before burning, Forms hard bead. Burning asphalt odor.

POLYPROPYLENE (Multifilament)

Breaking Strength (Grams per Denier)

2.5 to 8gpd

Specific Gravity

0.91 (floats)

Stretch Elongation at Break Point

20 to 100%

Elastic Recovery

98 at 5%

95 at 10%

Moisture Absorbancy

Negligible

Effect of Heat

50% Tensile at 200° F

Melts at 320° F

Effect of Acids

Good resistance except with oxidizing agents.

Effect of Alkalis

Good resistance.

Effect of Organic Solvents

Insoluble in most except chlorinated hydrocarbons.

Effect of Sunlight

Good resistance to indirect sunlight.

Effect of Age

Negligible

Resistance to Mildew

Not attacked.

Abrasion Resistance

Good resistance.

Identification

Floats. Melts before burning, Forms hard bead. Burning asphalt odor.

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