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AssigneesMitsubishi Gas Chemical Company, Inc., Mgc Filsheet Co., Ltd.
InventorsRyuji YOSHIDA, Toshihiko TAKANO, Taisuke SASAGAWA, Tomomi NAKAYAMA
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A functional sheet with protective films obtained by laminating protective sheets includes aromatic polycarbonate onto a functional layer that is a polyvinyl alcohol polarizing layer or a photocromic layer or any combination thereof and having the protective films adhere to the protective sheets. The protective films have at least two or three layers i.e., a base layer composed of a polypropylene that has a melting point higher than the glass transition temperature of an aromatic polycarbonate; an adhesive layer composed of a heat plastic polyolefin elastomer composed of a polyolefin that has a melting point from a temperature that is 15° C. lower than the glass transition temperature of the aromatic polycarbonate to a temperature that is lower than the glass transition temperature and a styrene-olefin-styrene co-poly-elastomer; and a middle layer composed of a polyolefin resin between the base layer and the adhesive layer.
1:
The functional sheet with protective films of claim 1, wherein the polypropylene that is used for the base layer is a low density polypropylene and its melting point is 150-170° C. and the thickness of the base layer is 30-60 μm.
The functional sheet with protective films of claim 1, wherein the polyolefin of the adhesive layer is a low density polyolefin and the melting point of the polyolefin is 135-145° C. and the thickness of the adhesive layer is 5-30 μm.
The functional sheet with protective films of claim 1, wherein the protective film has a layer composed of a polyolefin resin between the base layer and the adhesive layer and the melting point of the layer composed of the polyolefin resin is lower than that of the base layer.
A method for producing polycarbonate injection molded lens comprising these steps:
Dependencies are inferred from the claim text.