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The difference between polyester fibers and medical fibers

The difference between polyester fibers and medical fibers

The difference between polyester fibers and medical fibers

Polyester fibers are also known as polyester fibers, which are synthesized by polycondensation of organic dicarboxylic acid and diol through spinning. They are called PET fibers for short. They belong to macromolecule compounds and are also the largest variety of synthetic fibers at present. The greatest advantage of polyester fibers is that they have good wrinkle resistance and shape retention, and have high strength. Elastic resilience, durable, wrinkle-resistant, non-scalding, non-sticky hair; and medical fibers are medical fibers, which require non-toxic, pure, non-allergic, non-carcinogenic, non-thrombosis, non-destruction of blood cells and changes in plasma protein composition.

With the development of organic synthesis, polymer science and industry, a variety of practical PET fibers with different properties have been developed in recent years, such as polybutylene terephthalate fibers with high elasticity and polypropylene terephthalate fibers, all-aromatic polyester fibers with super high strength and modulus, polyester fibers, etc. It has a series of excellent properties, such as high breaking strength and modulus of elasticity, moderate resilience, excellent heat setting effect, good heat and light resistance.

Medical fibre materials, including human substitute materials and medical and health materials, such as heart valves, carbon fiber tendons, ligaments, artificial bones and artificial joints, artificial skin, artificial blood vessels, hollow fiber artificial kidney, artificial liver, artificial spleen, artificial lung and plasma separator, absorbable sutures, hemostatic fibers and blood sucking fibers. Vitamin, detoxification fibers, bandages, sanitary napkins, masks, surgical clothes and masks, X-ray plates, optical fibre gastroscopes, deodorizing and sterilizing fibers and health functional fibers, etc.

Medical fibers are made from corresponding polymers into hollow fibers, superfine fibers, monofilaments, nonwovens, fabrics and composite materials, which are further processed or assembled.

The main function of polyester fiber is to improve the high temperature stability, because the three-dimensional distribution of polyester fiber monofilament, at the same time with asphalt has a strong adsorbability, and not winding, can adsorb too much free asphalt, so that the viscosity and cohesion of asphalt increase, at the same time due to the crisscross-stiffening and asphalt. Bridging reduces the flow performance of asphalt, restricts the lateral displacement or flow of aggregate, effectively improves the high temperature stability, greatly improves the stability of fiber-reinforced asphalt concrete, improves the low temperature crack resistance, and the adsorption of fibers on asphalt, which results in the increase of the optimum asphalt content in asphalt concrete. The asphalt content of fiber asphalt mixture can keep flexibility and high tensile strength at – 40 C, effectively resist shrinkage stress, enhance the low temperature crack resistance of mixture, reduce the generation of temperature shrinkage cracks and prevent the development of reflective cracks.

The other is that polyester fibers can improve the fatigue resistance of asphalt pavement under the action of external temperature environment, under the repeated action of wheel loads, when the repeated action of loads exceeds a certain number of times, the stress generated in the pavement under the action of loads will exceed the structural resistance of strength decline, causing cracks on the pavement, leading to the generation of cracks. Fatigue fracture failure, after adding polyester fibers, the uniform distribution of fiber monofilaments in the mixture reinforcement effect, make its stiffness modulus increase, improve the fatigue resistance of asphalt concrete, improve the water stability of asphalt pavement, refers to the asphalt pavement in the presence of water, withstanding traffic load and temperature contraction. Repeated action.

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