Search results
Results from the WOW.Com Content Network
The name high temperature plastics is in use due to their continuous service temperature (CST), which is always higher than 150 °C by definition (although this is not their only feature, as it can be seen above). The term "polymers" is often used instead of "plastics" because both terms are used as synonyms in the field of engineering.
Certain grades have a maximum continuous service temperature of 327 °C (621 °F). They are commonly used to make O-rings and gaskets that are used in applications that involve contact with hydrocarbons or highly corrosive fluids, or when a wide range of temperatures is encountered.
The continuous service temperature of high-performance plastics is generally stated as being higher than 150 °C, [12] whereas engineering plastics (such as polyamide or polycarbonate) are often defined as thermoplastics that retain their properties above 100 °C. [13] Commodity plastics (such as polyethylene or polypropylene) have in this ...
Traditional product PVC has a maximum operating temperature around 60 °C (140 °F) when heat distortion begins to occur. [ 35 ] As a thermoplastic, PVC has an inherent insulation that aids in reducing condensation formation and resisting internal temperature changes for hot and cold liquids.
These properties are maintained during continuous use to temperatures of up to 232 °C (450 °F) and for short excursions, as high as 704 °C (1,299 °F). [14] Molded polyimide parts and laminates have very good heat resistance. Normal operating temperatures for such parts and laminates range from cryogenic to those exceeding 260 °C (500 °F).
In a study of 259 plastic water bottles at the State University of New York at Fredonia, scientists found that 93% of the surveyed bottles had some form of microplastic contamination.
In the study, researchers estimated that using black plastic kitchenware could cause an intake of 34,700 nanograms a day of decaBDE. But, in a section of the study on “Health and Exposure ...
The 2-year-old girl's body temperature was found to be as high as 109.4 degrees Fahrenheit, according to police Parents Accused of Leaving Toddler in Closet Overnight with Space Heater On. She Was ...