Purified Terephthalic Acid is an organic compound with formula C6H4(CO2H)2. This white solid is a commodity chemical, used principally as a precursor to the polyester PET, used to make clothing and plastic bottles. Purified Terephthalic Acid Uses Several million tonnes are produced annually.The common name is derived from the turpentine-producing tree Pistacia terebinthus and phthalic acid.
Virtually the entire world's supply Pvc Resin of Pure Terephthalic Acid (pta) and dimethyl terephthalate are consumed as precursors to polyethylene terephthalate (PET). World production in 1970 was around 1.75 million tonnes.By 2006, global purified terephthalic acid (PTA) demand had exceeded 30 million Ethylene-Vinyl Acetate tonnes. A smaller, but nevertheless significant, demand for terephthalic acid exists in the production of polybutylene terephthalate and several other engineering polymers.Polyester fibers based on Pta Pure Terephthalic Acid provide easy fabric care, both alone and in blends with natural and other Pta Powder synthetic fibers. Polyester films are used widely in audio and video recording tapes, data storage tapes, photographic films, labels and other sheet material requiring both dimensional stability and toughness.
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According to statistics from the traffic control department, recently, due to the high temperature, the city's roads frequently suffer from vehicle puncture failures.
According to analysis, there are three main reasons for puncture: First, the tread pattern is worn badly, and it has not been replaced in time. Second, the vehicle has not been subjected to safety inspections prior to travel, and the side crowns have been injured. The vehicle punctures at high speed; Tyres are subjected to punctures due to external forces during vehicle driving.
Six points for the summer tires:
One should always check the tire pressure, to maintain normal tire pressure; to check whether the sidewall fetal crown injury, such as bulging, scratches, injuries, etc., if found in the fetal crown with wounds should be replaced in time, so as to avoid explosion in the driving fetal.
Second, we must constantly check the pattern of the tire wear, if you find that pattern wear has reached the design limit, it must be updated.
Third, we must check the tire rubber aging, because the tire rubber aging, will play a "small mouth" on the side of the tire, causing a puncture.
In the long-distance and high-speed driving, the emergency braking should be avoided as much as possible. The sudden braking will make the “capacity†in the tire smaller, the pressure in the tire increases, and it will cause a flat tire; in the long-distance and high-speed driving, the habit of middle speed driving should be developed. And pay attention to mid-parking to allow the tire to rest and drop and cool down, but do not avoid pouring water to cool the tires.
Fifth, in the long-distance, high-speed driving should also develop the habit of holding the steering wheel with both hands, so that even in the event of a sudden situation such as puncture can be easily handled.
Sixth, when driving at high speed, if you encounter a puncture, you must not slam the brakes. Instead, you should lightly “point†the brakes while holding the steering wheel with both hands. Keep the car as steady as possible, and slowly pull over to stop.