PROBLEM TO BE SOLVED: To provide a light-shielding packaging material which requires barrier properties of preventing oxygen from infiltrating not to deteriorate the quality of fillings and light-shielding properties against ultraviolet rays and short-wavelength visible rays, and has transparency that enables characters on an inside infusion bag to be visibly recognized easily in other visible light region with regard to an external bag as the secondary package for an infusion bag filled with liquid medicines such as sugar, electrolytes, amino acid and vitamins.SOLUTION: The light-shielding packaging material is made by providing one surface of a thermoplastic resin film substrate with a light-shielding layer consisting of a transparent colored ink layer, an ultraviolet light-shielding ink layer that contains an ultraviolet absorbent, and a transparent colored ink layer, an adhesive layer, an oxygen barrier layer, an adhesive layer and a thermal welding layer. The light-shielding laminated packaging material has a transmittance less than 2% of parallel transmitted light of 340 nm wavelength and transmittance less than 1% of parallel transmitted light of 480 nm wavelength, and has a haze value (turbidity) less than 35% in the visible light region of 500 nm or longer wavelength.COPYRIGHT: (C)2013,JPO&INPIT【課題】本発明は、糖、電解質液、アミノ酸、ビタミン類などの液薬剤が充填される輸液バッグの2次包装としての外装袋に関して、充填物の品質を劣化させないための、酸素の進入を防止するバリア性、や紫外線および短波長可視光線に対する遮光性が必要とされており、かつ、それ以外の可視光線領域では、中の輸液バッグの文字が容易に視認できるよう透明性が保持されている遮光性包装材料を提供することを課題とするものである。【解決手段】熱可塑性樹脂フィルム基材の片面に、透明着色インキ層/紫外線吸収剤含有の紫外線遮光インキ層/透明着色インキ層よりなる遮光層、接着剤層、酸素バリア層、接着剤層、熱溶着層を設けることで、平行透過光において340nmの透過率が2パーセント未満、480nmの透過率が1パーセント未満、500nm以上の可視光線領域でのヘイズ値(濁度)が35パーセント未満となる遮光性積層包装材料を作成した。【選択図】図1
