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    • 63. 发明申请
    • RESIN COATED SEAMLESS CAN
    • 树脂涂层无缝罐
    • US20080241448A1
    • 2008-10-02
    • US12135005
    • 2008-06-06
    • Kazuhiro SatoKazuaki Ohashi
    • Kazuhiro SatoKazuaki Ohashi
    • B32B15/08
    • B32B15/09B32B15/08B32B27/36B32B2367/00B65D1/165B65D65/42Y10T428/13Y10T428/1303Y10T428/1352Y10T428/1355Y10T428/1359Y10T428/139
    • A resin-coated seamless can of the present invention is a resin-coated seamless can formed of a resin-coated metal sheet 1 which is produced by coating a polyester resin layer 3 containing polyethylene terephthalate onto a surface of a metal substrate 2, wherein the density of a polyester resin layer of a can inner surface side is set to equal to or more than 1.36 at a can barrel upper portion. Further, an infrared dichroic ratio (R1) of the polyester resin layer at the inner surface side of the can barrel portion which is expressed by a following formula (1) is set to equal to or more than 1.1. R1=Iw(⊥)/Iw(∥) . . . (1). In the formula (1), Iw(⊥) indicates an infrared absorption intensity of 973 cm−1 with respect to polarized infrared rays perpendicular to the can height direction at the can barrel portion, and Iw(∥) indicates an infrared absorption intensity of 973 cm−1 with respect to polarized infrared rays parallel to the can height direction at the can barrel portion.
    • 本发明的树脂被覆无缝罐是通过将含有聚对苯二甲酸乙二醇酯的聚酯树脂层3涂布在金属基材2的表面上而制成的树脂被覆金属片1形成的树脂被覆无缝罐,其中, 罐内表面侧的聚酯树脂层的密度在罐筒上部设定为等于或大于1.36。 此外,由下述式(1)表示的罐筒部的内表面侧的聚酯树脂层的红外线二向色比(R1)设定为1.1以上。 R1 = Iw(⊥)/ Iw(‖)。 。 。 (1)。 在公式(1)中,Iw(⊥)表示相对于在罐筒部分处的罐高度方向垂直的偏振红外线的973cm -1的红外吸收强度,Iw(∥ )表示相对于在罐筒部分处与罐高度方向平行的偏振红外线的973cm -1的红外吸收强度。