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High temperature plastic "killer"? Expert: reasonable

Automobil plastic net news: recently, a "80% cancer because drinking mineral water in the car," the article to forward in micro letter within the circle of friends a lot. The article said "don't stay in the car of bottled water, heat and plastic bottles in both together will produce chemicals, leading people to cancer".

Whether high temperature will make the release harmful substances in the plastic bottles? Associate professor of materials science and engineering college of fuzhou university bao-ming li said the teacher, summer mineral water is put in the car, can really accelerate the release of harmful substances. Don't placed around a car at high temperature mineral water, beverage, etc.

But it didn't explain the principle of plastic bottle "poison"

Recent articles in heat transfer in micro letter "80% cancer because drinking mineral water in the car," said: "you must not drink bottled water that has been left in a car, a net friend's mother has only recently been diagnosed with breast cancer. The doctor told her, should not drink bottled water that has been left in a car. Heat and plastic bottles in both together will produce chemicals, and those who lead people to cancer. Especially when the bottle is placed in the car boot of high temperature, high temperature change will make polyester bottle, lead to more harmful substances penetrate into the water, become a health hazard."

Reporter query through the network to a similar article began as early as a few years ago. The earliest biography "reuse disposable bottles will be carcinogenic", then the "of the united Arab emirates (uae) a 12-year-old girl, use the same water bottles for 16 consecutive months, cancer", finally comes out now this version "summer mineral water is put in the car, be careful poisoning". Articles in addition to high temperature or repeated use of "bubble" harmful substances, in the bottle does not explain its principle.

Yesterday, reporter interviewed several owners, random said summer had a habit of mineral water in the car boot, for Internet rumors, do not know the letter or not.

Expert: PET plastic bottle water no problem at room temperature

Whether high temperature compartment water bottles will "killer"?

Associate professor of materials science and engineering college of fuzhou university, master tutor bao-ming li said the teacher, now on the market most of the water bottles bottle has a "PET" sign, the PET plastic bottle temperature reaches 70 ℃ is easy deformation, which is using mineral water bottled water bottle would be the cause of the deformation. But the melting point of the material is very high, to destroy it, need to be above 240 ℃ high temperature. Even into the boiling water, bottle will only be out of shape, also will not release harmful substances. Pure PET resin itself, therefore, there is no harm to health.

But bao-ming li stressed that in the process of producing PET bottles, due to oxidation, PET bottle preform of acetaldehyde is produced. Acetaldehyde is a kind of mutually soluble organic compounds with water, will stimulate the stomach, heart, liver and kidney injury. Countries have strict limits on acetaldehyde content in PET bottles, acetaldehyde content in the normal production of PET bottles is very low, almost can't harm to human body, but in the long after contact with mineral water, acetaldehyde will gradually moved into the water from the bottle.

"But at a lower temperature, acetaldehyde migration to the water speed is slow." Bao-ming li said, so, general and normal temperature storage, warranty period of mineral water, acetaldehyde content is very low, almost can't harm to human body. But if the PET water bottles to a high temperature, especially in the high temperature for a long time, higher temperatures will increase the speed of acetaldehyde migration to the water, causing water content of acetaldehyde in rise, cause a harm to human body.

Our reporter was the experiment last year, after the sun insolates vehicle temperature as high as 75 degrees Celsius. Therefore, bao-ming li suggested that don't placed around a car at high temperature mineral water, beverage, etc. But usually at room temperature, PET plastic bottle contains water and drinks, no problem, also there is no need to talk about the PET plastic bottles.

As for the high temperature water bottles "poison" cause cancer, Mr Li said that this requires scientific experiment and long-term observation to demonstrate, not alarmist.