General Information on Polypropylene Rope
The material was invented by Giulio Natta in Milan in 1954. It is a fantastically versatile material widely used in industry because it is very light and resistant to flex fatigue. Nearly all flip top bottles use polypropylene for this reason. As a rope it makes a hard wearing strong line which floats. This property lends it for applications requiring a surface line, such rescue lines and dinghy painters which would otherwise get snarled in the towing vessels prop if the line went slack. It is an economical rope too enabling large diameter lines to be affordable so it is often choosen for barrier ropes and for garden use. Furthermore its excellent insulating properties make it first choice when working near high voltages.
Technical Specification on Polypropylene
Material: Polypropylene. Abbreviation PP
Specific Gravity: 0.91
Resistance to Acid: Very good
Resistance to Alkali: Good
Resistance to Solvents: Good except Carbon Tetrachloride
Resistance to Heat: Up to 80°C Short exposure
Resistant to UV: Poor except when treated
Resistance to abrasion: Fair
Affected by Moisture: No
Stretch: Moderate (12 - 20% at break) Creep: At high loads.
Knot holding: Excellent in matt ropes
Washing temperature: 30°C
Approximate Melting Point: 170°C