Reinforced glass fiber (FRP) is a lightweight material and is widely and widely used in many industrial, agricultural and fishery products. Although it is not as strong as the carbon fiber composite material
What is FRP?
Composite (or FRP: Fibeglass Reinfored Plastic) is a kind of fiber reinforced plastic composite, that reinforced fiber is special glass. Fiberglass can be arranged randomly, straight yarn, woven into a fabric or made into flat sheets (pressed into a rug). Fiber matrices can be bonded via a polymer thermal reaction: the most commonly used are based on thermosetting polymers such as epoxy, vinylester, or polyester. Also use thermoplastic method. Composite is very strong and lightweight
The glass fibers are made of different quality glass lines, so depending on the purpose of use will choose different types. These glass contain either silica or silicate, with varying amounts of calcium oxide, magnesium and sometimes even boron. To be used in composites, fiberglass must be kept to a minimum with defects.
Reinforced glass fiber (FRP) is a lightweight material and is widely and widely used in many industrial, agricultural and fishery products. Although it is not as strong as a carbon fiber composite material, it is not brittle and its material is very cheap. Compared to metal, its strength, weight is better and more than composite, it is easy to cast complex shapes.
IS GLASS FIBER HARMFUL TO PEOPLE?
In June 2011, the National Toxicology Program (NTP of the United States) was removed from the Report on Carcinogens of all soluble glass wool used in homes and building insulation and products. not insulated. However, NTP considers fiberglass dust to be "reasonably anticipated a carcinogen in humans (Some glass wool fibers (inhalable)". Similarly, the Office of Environmental Risk Assessment of California ("OEHHA") announced a November 2011 amendment to its Proposition 65 list to include only "Glass wool (inhalable by respiratory system)". NTP actions of the United States and California OEHHA means the cancer warning label for greenhouses and insoluble insulated glass fiber construction no longer required under federal or California law. used for insulating, soundproofing materials reclassified by the International Agency for Research on Cancer (IARC) in October 2001 as unspecified for carcinogenicity. people.
People can come into contact with fiberglass at work by breathing in, in contact with skin or with eyes. The Occupational Health and Safety Administration (OSHA) has set a legal limit (permissible exposure limit) for workplace fiberglass exposures with a total of 15 mg / m3 and 5 mg / m3 in Respiratory exposure for 8 working hours. The National Institutes of Occupational Safety and Health (NIOSH) has established a recommended exposure limit (REL) of fiber / cm3 (less than 3.5 micrometers in diameter greater than 10 micrometers in length) as an average time per working day (8- working hours) and a total limit of 5 mg / m3.
The European Union and Germany classify synthetic glass fibers as likely or possibly carcinogenic, but fibers can be exempted from this type if they pass specific tests. The evidence for these classifications mainly comes from experimental animal studies and their carcinogenic mechanisms. The wool glass epidemiological studies were convened by an international team of experts by IARC. These experts concluded: “Epidemiological studies published in the 15 years since previous IARC monographs examined these fibers in 1988 have no evidence of lung or cancer risk. Mesothelioma (body mucosal cancer) from occupational exposure during the production of these materials, and incomplete evidence of any cancer risk. Similar assessments on epidemiological studies have been carried out by the Registry of Poisons and Diseases ("ATSDR"). The National Toxicology Program, the National Academy of Sciences, the Harvard School of Public Health and Health have reached the same conclusion as the IARC that there is no evidence of an increased risk from occupational exposure to glass wool yarn.
Fiberglass stimulates eyes, skin and respiratory system. Potential symptoms include eye, skin, nose, throat irritation, shortness of breath, sore throat, hoarseness and cough. Scientific evidence shows that fiberglass is safe to manufacture, install and use when recommended work practices are followed to reduce temporary mechanical irritation. Unfortunately these work practices are not always followed and fiberglass is often exposed in the basement which is later occupied. Fiberglass insulation should never be exposed in an occupied area, according to the American Lung Association.