Engineering Concrete Reinforcement Additive Polypropylene Crack Resistant Fiber

Product Description

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OTHER PROPERTIES OF PP:
In general, polypropylene fiber has excellent chemical resistance to acids and alkalis, high abrasion resistance and resistance to insects and pests. PP fiber is also easy to process and inexpensive compared to other synthetic fibers. Its low moisture absorption helps aid the quick transport of moisture.

ADVANTAGES OF POLYPROPYLENE FIBERS:

1. Polypropylene is a light fiber, its density (.*1 gm/cm³) is the lowest of all synthetic fibres.
2. It does not absorb moisture. This means the wet and dry properties of the fibre are identical. Low moisture regain is not considered a disadvantage because it helps in quick transport of moisture as is required in special applications like babies ever-dry nappies.
3. It has excellent chemical resistance. PP fibres are very resistant to most acids and alkalis.
4. The thermal conductivity of PP fibre is lower than that of other fibres and may be used in applications as thermal wear.

DISADVANTAGES OF POLYPROPYLENE FIBERS:
The main drawbacks of PP fibers are listed below:

1. Low melting temperature which prevents it from being ironed like cotton, wool, nylon etc.,
2. Hard to be dyed after manufacturing, except after substantial treatment and modification,
3. High crystallinity and poor thermal conductivity lead to limited texturizability. [Drawn polypropylene requires a contact time of 2 seconds in the heater compared to PET (POY) which requires only 0.4 seconds]
4. Poor UV and thermal stability which requires addition of expensive UV stabilizers and antioxidants to overcome this problem,
5. Poor resilience compared to PET and Nylon,
6. Creeping due to its low Tg(**5 to **0°C),
7. Poor adhesion to glues and latex, and
8. Flammable which melts and burns like wax.

USES / APPLICATIONS OF POLYPROPYLENE FIBERS:
Because of its superior performance characteristics and comparatively low-cost, polypropylene fiber finds extensive use in the nonwovens industry. PP is a very important fiber in nonwoven processing and dominates in many nonwoven markets. The main application areas include: nonwoven fabrics (refer to Table), particularly absorbent product coverstock markets, home furnishings and automotive markets.