Polyester Mat

Polyester mat has a series of excellent properties, such as high breaking strength and elastic modulus, moderate resilience, excellent heat setting effect, good heat resistance and light resistance. The melting point of the polyester mat is about 255°C, and the glass transition temperature is about 70°C. It is stable in shape under a wide range of end-use conditions, and the fabric is washable and wearable. In addition, the polyester mat also has excellent resistance (such as resistance to organic solvents, soap, etc.) , detergent, bleach, oxidant) and good corrosion resistance, stable to weak acid, alkali, etc., so it has a wide range of food and industrial uses. The rapid development of the petroleum industry has also provided more abundant and cheap raw materials for the production of polyester fibers. In addition, the development of technologies such as chemical engineering, machinery, and electronic self-control technology in recent years has gradually realized the short-term process of raw material production, fiber forming, and processing. Polyester fiber has become the fastest-growing and highest-yielding synthetic fiber variety. In 2010, the global polyester fiber output reached 37.3 million tons, accounting for 74% of the world's total synthetic fibers.

1. Improve high-temperature stability and increase high-temperature stability. Due to the three-dimensional distribution of polyester fiber monofilaments, it has strong adsorption with asphalt and does not entangle. It can absorb too much free asphalt and increase the viscosity of asphalt. At the same time, due to the crisscross reinforcement and bridging effect, the flow performance of asphalt is reduced, the lateral displacement or flow of aggregate is limited, the high temperature stability is effectively improved, and the stability of fiber asphalt concrete degree has been greatly improved.

2. Improve low-temperature crack resistance, the adsorption of fiber to asphalt, resulting in an increase in the optimal amount of asphalt in asphalt concrete, and a higher asphalt content, so that the fiber asphalt mixture remains flexible and high at a low temperature of -40°C High tensile strength, effective resistance to shrinkage stress, enhance the low temperature crack resistance of the mixture, reduce the generation of temperature shrinkage cracks and prevent the development of reflective cracks.

3. Improve anti-fatigue performance Asphalt pavement is subjected to repeated wheel loads under the action of external temperature environment. When the load is repeated for more than a certain number of times, the stress generated in the pavement under the load will exceed the structural resistance of the reduced strength. Cracks appear on the pavement, leading to fatigue fracture damage. After adding polyester fibers, the uniform distribution of fiber monofilaments in the mixture increases the stiffness modulus and improves the fatigue resistance of asphalt concrete.

4. Improve water stability The water stability of asphalt pavement refers to the repeated action of traffic load and temperature expansion and contraction of asphalt pavement in the presence of water. The addition of polyester fibers thickens the asphalt film, reduces the strength of water-displaced asphalt, and reduces the amount of water infiltrated into asphalt concrete. In addition, the adsorption of fibers increases the viscosity of asphalt, which improves the asphalt and asphalt. The bonding force of the aggregate strengthens the ability of the interface film formed by asphalt and aggregate in the asphalt mixture to resist moisture stripping, thereby improving the water stability of the asphalt mixture.

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