Polypropylene thread, also known as polypropylene or PP, is a synthetic fiber, transformed from 85% propylene, and used in a variety of applications. … The fiber is thermoplastic, resilient, light weight and resistant to mildew and many different chemicals.
Advantages of polypropylene Thread
- Lower specific gravity/density (0.91 g/cm³) – More fibers/unit weight (~25% more).
- More hydrophobic – absorbs less water and therefore dries faster.
- Lower heat transfer – Retains more heat.
- Inert to most chemicals.
- Lower Cost than Polyester thread.
Polyester thread is a synthetic all-purpose thread. It is a good choice for most machine and hand sewing projects. Polyester thread works well with stretchy fabrics as it has much give to it. … Polyester is made to be stronger than most natural threads. It is important to avoid using polyester thread with natural fabric.
Advantages of Polyester Thread
- Higher strength, tenacity and creep resistance – distinct advantage in Geotextiles and especially when load is on a fabric.
- Greater yield per pound.
- Higher melting point (260°C vs 165°C).
- Withstands high temperature washing and drying.
- More UV resistant – Retains strength and color better.
- Resistant to most chemicals.
- Strength higher than PP thread.
- Has good abrasion resistance.
- Polyester is used more for sewing – Higher strength and can withstand high temperatures generated during the sewing process (up to 350°C).
- Polyester produces a better all-around fabric and sewing thread.