Manmade mineral fiber

A survey of the literature [28, 58-65, 71, 72, 74-80] indicates that the most frequent exposure to silicon involves exposure to silica and silicates mainly in their crystalline forms. Health risks associated with the exposure to other sihcon containing compounds were reported in the mortality study of 16.661 manmade mineral fiber workers employed during 1945 to 1963 at one of 17 U.S. manufacturing plants [75]. Fiber exposure in the plants producing fibrous glass or mineral wool, or both, was associated with increased... 

Marsh GM, Enterline PE, Stone RA, Henderson VL. Mortality among a cohort of U.S. manmade mineral fiber workers 1985 follow-up. J Occup Med 1985 32 594-604. 

Synonyms/Trade Names Manmade mineral fibers, Rock wool, Slag wool. Synthetic vitreous fibers [Note Produced by blowing steam or air through molten rock (rock wool) or various furnace slags that are by-products of metal smelting or refining processes (slag wool).] ... 

The entire spectrum of inorganic fibers can be divided into two classes, based on differences in the crystallinity of the solids (Ray, 1978). Synthetic fibers have been known as man-made mineral fibers (MMMF) and manmade vitreous fibers (MMVF). But fibrous materials can be approached or divided in other ways. For example, in the Concise Encyclopedia of Chemical Technology (1985) the entry for chemical fibers includes both manmade and natural polymers, with the discussion centering on carbon-based compounds such as acetates, acrylics, and cellulose. Fibers of other inorganic compounds were not mentioned in the encyclopedia under this entry, but silica glass fibers were described under the heading Optical Fibers. ... 

Fibers based on natural materials are divided into two categories natural fibers found in the plant, animal, and mineral kingdoms and regenerated cel-lulosic fiber, which are manmade fibers made out of natural polymers. 

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