Polycarbonate composite article
The present application relates to a polycarbonate composite article, a preparation method therefor, and use thereof. The polycarbonate composite article includes a foamed polycabonate layer and a non-foamed polycarbonate film layer on the foamed polycarbonate layer. The polycarbonate composite article according to the present invention has a reduced weight and improved signal penetration performance, and can be used as an antenna housing.
1 . A polycarbonate composite article for an antenna housing, comprising:
a non-transparent foamed polycarbonate layer; and
a non-foamed polycarbonate film layer on the foamed polycarbonate layer;
wherein,
the foamed polycarbonate layer comprises a polycarbonate resin, an impact modifier and an optional flame retardant;
the non-foamed polycarbonate film layer comprises a polycarbonate resin and an optional UV stabilizer, and has a thickness in the range of 0.2-1.0 mm,
the ratio of the thickness of the non-foamed polycarbonate film layer to the thickness of the foamed polycarbonate layer is in the range of 1:3-1:20,
the polycarbonate composite article does not comprise an inorganic reinforcement material,
the content of the impact modifier in the foamed polycarbonate layer is 1 wt % to 8 wt %, based on the weight of the foamed polycarbonate layer,
the impact modifier is a silicone containing impact modifier, and
the density of the foamed polycarbonate layer is 0.8-1.18 g/cm 3 .
2 . The polycarbonate composite article according to claim 1 , wherein the thickness of the foamed polycarbonate layer is in the range of 1.5-10 mm.
3 . The polycarbonate composite article according to claim 1 , wherein the thickness of the non-foamed polycarbonate film layer is 0.2-0.6 mm.
4 . The polycarbonate composite article according to claim 1 , wherein the polycarbonate resin used in the foamed polycarbonate layer is the same as that in the non-foamed polycarbonate film layer.
5 . The polycarbonate composite article according to claim 1 , wherein the polycarbonate composite article consists of the foamed polycarbonate layer and the non-foamed polycarbonate film layer.
6 . The polycarbonate composite article according to claim 1 , wherein the ratio of the thickness of the non-foamed polycarbonate film layer to the thickness of the foamed polycarbonate layer is in the range of 1:3-1:15.
7 . A polycarbonate composite article for an antenna housing, comprising:
a non-transparent foamed polycarbonate layer; and
a non-foamed polycarbonate film layer on the foamed polycarbonate layer,
wherein,
the foamed polycarbonate layer comprises a polycarbonate resin, an impact modifier and an optional flame retardant,
the non-foamed polycarbonate film layer comprises a polycarbonate resin and an optional UV stabilizer, and has a thickness in the range of 0.2-1.0 mm, and
the ratio of the thickness of the non-foamed polycarbonate film layer to the thickness of the foamed polycarbonate layer is in the range of 1:3-1:20.
8 . A method of preparing the polycarbonate composite article according to claim 1 , comprising the steps of placing the non-foamed polycarbonate film on the inner surface of an injection mold and closing the mold to form a cavity; and
forming the foamed polycarbonate layer by injecting and foaming a melted polycarbonate composition comprising a polycarbonate resin, an impact modifier and an optional flame retardant in the cavity.
9 . An antenna housing comprising polycarbonate composite article according to claim 1 .
10 . The antenna housing according to claim 9 , wherein the non-foamed polycarbonate film layer is an outer layer exposed to an external environment and the foamed polycarbonate layer is an inner layer close to an antenna.