Chemical Properties:

Elongation

Commercial polypropylene multifilament have an elongation that break in the region of 20 to 30 %

Effects of Moisture:

Polypropylene is a paraffin hydrocarbon and does not absorb water. Moisture does not effect the tensile strength of the net or any of the other mechanical properties.

Effect of Temp:

Polypropylene retains its flexibility to temperatures of 70 deg C or lower.

Softening point:

The softening point of polypropylene fibres is in the region of 150 deg C and the fibre will melt at between 160 – 170 deg C. The softening and melting points are determined by the nature of polymer and the way the crystallinity has been influenced during the treatment of the fibre after spinning.

Effect of sunlight:

Polypropylene is attacked by atmospheric oxygen, and the reaction is stimulated by sunlight. Polypropylene fibre will deteriorate on exposure to light, this can be helped by the inclusion of inhibitors within the product.

Chemicals:

• Acids – excellent
• Alkalis – Excellent

Polypropylene is inert to a wide range of chemicals. It’s high crystallinity tends to make it more resistant to chemicals that degrade olefin fibres.