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A study showed that the products were about 40–50 wt.% liquid, 14–16 wt.% gases, while 34–43 wt.% remained as solid residue. Liquid products contained mainly phenol derivatives (~75 wt.%) and bisphenol (~10 wt.%) also present. [39] Polycarbonate, however, can be safely used as a carbon source in the steel-making industry. [41]
As a rule, plastic coatings have significantly higher film thicknesses than conventional paint. For polymer coating, powder coating is commonly used. [10] There are also options for wet coating, vacuum coating, dip coating, or thermal spraying. The coating can be applied to a polymer or a polymeric material.
Anti-scratch coatings are often used on plastic products wherever optical clarity, weathering, and chemical resistance are required. Examples include optical discs, displays, injection-molded parts, gauges and other instruments, mirrors, signs, eye safety/protective goggles, and cosmetic packaging. These coatings are usually water-based or ...
Covestro AG is a German company producing polyurethane and polycarbonate raw materials. Products include isocyanates and polyols for cellular foams, thermoplastic polyurethane and polycarbonate pellets, as well as polyurethane based additives used in the formulation of coatings and adhesives. [2]
Polycarbonate polyols are more expensive than other polyols and are thus used in more demanding applications. [31] [32] They have been used to make an isophorone diisocyanate based prepolymer which is then used in glass coatings. [33] They may be used in reactive hotmelt adhesives. [34] All polyols may be used to produce polyurethane prepolymers.
In particular, infants were considered to be at greater risk, [88] leading to bans on the use of BPA in baby bottles and related products by the US, [89] Canada, [90] and EU [91] amongst others. Bottle producers largely switched from polycarbonate to polypropylene and there is some evidence that BPA exposure in infants has decreased as a result ...
Extrusion coating is the coating of a molten web of synthetic resin onto a substrate material. It is a versatile coating technique used for the economic application of various plastics, notably polyethylene, onto paperboard, corrugated fiberboard, paper, aluminium foils, cellulose, non-wovens, or plastic films. It was. first developed in the ...
Some coatings are processed by UV curing for stability. Most plastic coatings in the packaging industry are polyethylene and to a much lesser degree PET. Liquid packaging board cartons typically contain 74% paper, 22% plastic and 4% aluminum. Frozen food cartons are usually made up of an 80% paper and 20% plastic combination. [8]
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