The characteristics of polypropylene fiber can be summarized as follows:
1. Physical performance characteristics
Strength and elasticity:
The strength of polypropylene fiber is close to that of nylon, with high strength, and the dry and wet strength are basically the same.
Good elastic recovery, the product is crisp and not easy to wrinkle, and has good shape retention.
The wear resistance is second only to nylon, and the wear resistance is good.
Specific gravity and warmth retention:
The specific gravity is small, only 0.91g/cm³, which is the smallest density among all synthetic fibers.
Good warmth retention, and the thermal conductivity is six times smaller than that of air.
Hygroscopicity:
Poor hygroscopicity, almost no water absorption, but has a wicking effect, and can transfer water vapor through the capillaries in the fabric.
2. Chemical performance characteristics
Acid and alkali resistance:
Good resistance to acids and alkalis, except for concentrated nitric acid and concentrated caustic soda, it has good corrosion resistance to general acids and alkalis.
Light resistance and heat resistance:
Poor light resistance, easy aging, not resistant to ironing.
The heat resistance is also poor, and it starts to shrink above 100℃. The ironing temperature should be controlled at 90~100℃ (steam ironing, mat).
3. Other characteristics
Dyeing:
The dyeing is poor and the color spectrum is incomplete, but the solution coloring method can be used to make up for the deficiency.
Environmental protection and cost:
The raw materials for the production of polypropylene fiber are abundant and cheap, and the production process is simple. It is currently a relatively cheap synthetic fiber.
Application field:
Polypropylene fiber can be used to make ropes, packaging materials, fishing nets, parachutes, etc., and can be composited with other fibers to process high-end carpets, etc.
In summary, polypropylene fiber has a wide range of applications in many fields due to its high strength, low specific gravity, wear resistance, acid and alkali resistance, and low price. However, its light resistance and heat resistance are poor, and its dyeing is limited, and these characteristics need to be paid attention to in application.