INJECTION MOLDING AND METHOD FOR MANUFACTURING THE SAME

PROBLEM TO BE SOLVED: To provide an injection molding having both rigidity and excellent appearance.SOLUTION: An injection molding 5 is manufactured by mixing a first kneaded material 3a obtained by melt-kneading a first thermoplastic resin 1a and a fibrous filler 2a, and a second kneaded material 3b obtained by melt-kneading a second thermoplastic resin 1b and a particulate filler 2b, and injection molding the obtained mixture as a material. As the first kneaded material 3a and the second kneaded material 3b, kneaded materials are used, respectively, of which shear viscosity A of the first kneaded material 3a at shear viscosity of 1×10/sec is larger than shear viscosity B of the second kneaded material 3b at the above shear viscosity.SELECTED DRAWING: Figure 1 【課題】剛性と美観との両方を有する射出成形品を提供する。【解決手段】第１の熱可塑性樹脂１ａおよび繊維状フィラー２ａを溶融混練してなる第１の混練物３ａと、第２の熱可塑性樹脂１ｂおよび粒状フィラー２ｂを溶融混練してなる第２の混練物３ｂとを混合し、得られた混合物を材料として射出成形して、射出成形品５の製造する。第１の混練物３ａおよび第２の混練物３ｂには、せん断速度１×１０３／秒での第１の混練物３ａのせん断粘度Ａが上記せん断速度での第２の混練物３ｂのせん断粘度Ｂよりも大きな混練物をそれぞれ用いる。【選択図】図１