A clear multilayer film for coating synthetic environmental surfaces includes an exposed protective layer and an underlying cushioning layer. The exposed layer is primarily a polymer blend of a fluorine substituted olefin polymer, such as polyvinylidene fluoride, with an acrylic polymer. The cushioning layer is of a low modulus polymer selected from among impact modified acrylic polymer, ethylene vinyl acetate polymer and metallocene catalyzed polyethylene and having an elastic modulus below about 30,000 psi (207 MPa). The cushioning layer should be substantially free of all fluorinated polymers. The multilayer film can have an optional additional thermally adhesive layer of a blend of a fluorine substituted olefin polymer with an acrylic polymer. The multilayer film offers superior protection to such substrates as outdoor building siding, vehicle body panels, and signs from stains, weather conditions, and especially impact damage. Any of the layers can also include fillers and additives adapted to provide a very low gloss appearance.
一种用于涂覆合成环境表面的透明多层薄膜包括外露保护层和底层缓冲层。外露层主要是
氟取代烯烃聚合物(如聚偏二
氟乙烯)与
丙烯酸聚合物的混合物。缓冲层为低模量聚合物,选自抗冲改性
丙烯酸聚合物、
乙烯-
醋酸乙烯聚合物和茂
金属催化聚
乙烯,弹性模量低于约 30,000 psi (207 MPa)。缓冲层应基本上不含任何含
氟聚合物。多层薄膜可以有一个由
氟替代烯烃聚合物和
丙烯酸聚合物混合物组成的附加热粘合层。多层膜可为户外建筑护墙板、车身面板和标志等基材提供卓越的保护,使其免受污渍、天气条件,尤其是撞击损坏的影响。其中任何一层还可以包括填料和添加剂,以提供极低光泽的外观。