I'm joking. Polypropylene is bad for the endocrine system. Although Lee doesn't tell patients which type of diffuser to use at home, he is leery of ultrasonic diffusers that employ a water reservoir to function. 100% NWPP used in high-quality re-usable grocery bags/conference bags is primarily isotactic polypropylene, which has a melting point between 160 to 166 °C (320 to 331 °F) and is safe to boil (100 °C / 212 °F), steam (121 °C / 250 °F), and/or autoclave. Polypropylene can give rise to the allergic reactions that people exposed to it have. Chemicals in synthetic fabrics aren’t the best companions for our skin. Now, viruses need water to remain viable, and are also negatively charged. Any plastic item not made from the above six plastics is lumped together as a #7 plastic. Melissa Breyer is Treehugger’s editorial director. It can cause genetic mutations and tumors. As much as we should avoid toxins in what we breathe and touch, we REALLY should avoid eating them! Still, that doesn't mean the other types are perfectly safe. The thin plastic filaments in typical disposable facemasks are a polymer called polypropylene. Anyway, given the age of the article and the fact that polypropylene is still being touted as a safe plastic, perhaps there are documented studies that negate the one referenced in this article. The melting point of polypropylene occurs in a range. It is used in a variety of applications to include packaging for consumer products, plastic parts for various industries including the automotive industry, special devices like living hinges, and textiles. Warm sweaters or light dresses, our favorite athletic leggings or shaping underwear — so many things around us are made from synthetic materials. Chu recommends polypropylene, a material that can be … I know polypropylene is a generally accepted safe plastic, but so was BPA once. If it’s too hard to breathe, it can be dangerous for people who have respiratory problems. I wouldn't worry if I were you, inhaling melted plastic once won't give you cancer. From bad odors to skin, rashes, nausea, or something even worse. Polypropylene has two great properties for repelling viruses: it is negatively charged, and it is water-repellent. Any plastic designated #7 is likely to leach BPA and/or BPS, both potent endocrine disruptors linked to interfering with proper mood, growth, development, sexual function, reproductive function, and puberty, among other essential human developmental processes. What is Polypropylene (PP), and What is it Used For? "Like other water-containing home machines (like a CPAP), they can be difficult to clean and encourage growth of microbes," he explains. But like the mask itself, it needs to be made of a safe material that’s comfortable to wear. I’d love to get your thoughts. Polypropylene (PP) is a thermoplastic “addition polymer” made from the combination of propylene monomers. Safe Non-Toxic Cookware Guide. 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