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One morning I listen to phone messages, Conscious happened. First pass a message to would like to know, safe to continue to use Teflon floss? The second General Clauses asked how to safe handling Teflon cookware? The third pass comments like to know, continue wearing hats coated with Teflon is not safe? I did not spend much effort to identify these fears of Teflon, is triggered by the evening news program a few days ago. The news as the "the textile protector" story from. Let s take a look at this story.
Back in 1952, 3M Company young chemist Xia Erman (Patey Sherman, 1930 -) was ordered to develop a material to resist jet fuel corrosion properties. Commercial washers and tube touched this fuel will deteriorate rapidly and require frequent replacement. Xia Erman very understanding Teflon type of fluorinated polymers, know they have a good anti-chemical characteristics of this type of material therefore began to experiment, but the experiment has not been progress.
One day, Xia Erman Assistant accidentally drops in some compounds buy a new tennis shoes, the very baby a ssistant new pair of shoes, but discouraged, whether it is water or any solvent, no way the shoes on mark removed. Xia Erman paid great attention to the chemical resistance of this kind of thing, and immediately change the focus of the experiment. In 1956, Xia Erman and another 3M chemist Smith (Sam Smith) to develop a new product: "Scotland Yard protector" (Scotchgard Protector) successfully listed. Cloth treated with this kind of thing, carpet, furniture, textiles, waterproof, non-stick characteristics of the dirt, very magical.
New materials is a very wide range of applications in the market, the main raw material perfluorooctane sulfuric acid (C8HF17O3S, PFOS), to produce several million pounds per year is enough. In May 2000, contrary to all the unexpected, the 3M company suddenly announced the shutdown of perfluorooctane sulfuric acid. The company s chemists found that the new products will be degraded, release of PFOS. PFOS in the environment stub born save time, longer than previously thought. Researchers in the blood of the seals, dolphins, mink, bald eagle, are measured PFOS, despite a very small amount, but as people have been on tenterhooks.
More important figure, even people s blood, How can people 捏一把冷汗. Many years, 3M has been paying attention to the contact with the the PFOS staff of blood, measuring the content of chemicals, they believe that the PFOS ingested with excrement cleared vitro. But even as the blood samples of the control group, appear PFOS, some people will think: not all the blood has for PFOS? If (yes, that is the case), these things are and how went to the blood go?
The follow-up study pointed out that one-third of the substance sprayed on the fabric, is dissipated in the air, these last by humans and animals sucked into the body. With this discovery, and then think about this kind of thing is so widely used, from fast-food products, packaging boxes, tents pain t to furniture fabrics, not surprising how it will appear in our blood. Of course, even if what chemicals are in our blood, nor necessarily mean dangerous.
PFOS example is not quite the same study, mice and primates exposure in excess of PFOS under, there will be health concerns. Of the human body, PFOS has not caused any health concerns, 3M Company also insisted that the reason no longer in production, is based on the corporate responsibility of protecting the environment. The company may see hanging on the wall of the slogan, suddenly conscience, decided to take the initiative to take action by the U.S. Environmental Protection Agency banned. Anyway, 3M Company has successfully found a lot of PFOS alternative products, although it still can not cover all of the previous product line. The main component of the new products is smaller molecules perfluorobutane sulfonate (C4F9SO3H), said no toxicity, and also less durable.
3M exit PFOS market, also disco ntinued the perfluorooctanoic acid (C8HF15O2, PFOA), this material is sold to other companies to manufacture Teflon, perfluorooctanoic acid and no appropriate alternatives. While 3M s withdrawal, DuPont was unmoved, still making a lot of of PFOA. , Like previous PFOS, PFOA in the environment everywhere, but the source is not so clear, and free of PFOA in Teflon products. Could be another short-chain fluorinated polymers do scouring agent, after the release of PFOA decomposition.hydraulic hose clamps
Before the news broadcast, the vast majority of people with PFOA never heard, let alone know that it is a hell of a. Arouse the attention of an unfortunate child, he was born on the eyes blind, only one nostril. The report pointed out that his mother during pregnancy had at the Teflon factory work, the inference little boy s deformity is exposed to PFOA caused. Born malformation is a common phenomeno n, no clear evidence before the inference that this association is very scientific. The show also describes Teflon heated above 290 ° C, releasing smoke toxic to birds to produce reversible "polymer fume heat will of the people. This does not mean, however, that in the case of normal use, Teflon floss, hats, and pots and pans, any risk to users.
The stubborn existence of PFOA in the environment is a topic yes, even the U.S. Environmental Protection Department also began to pay attention to this matter. But the investigation by the U.S. Environmental Protection Agency, the use of Teflon cookware and your kitchen has nothing to do. Teflon pots simply follow the normal way, not used as a frying for a long time, are quite safe. No matter what, if you put the food is heated to 290 ° C, the note that toxic substances produced in the heating process, rather than Teflon cookware will release what. Teflon pots and pans to make your cooking process less oil, co ok food healthier.
Talking about this, almost lunch time, why not come to a stir-fried vegetables? Teflon pan. After dinner I might find the root Teflon dental floss to clean between the teeth. Of course, I also have a coating Teflon sports cap, I like to wear it to exercise.
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