PROBLEM TO BE SOLVED: To provide an irregular-shaped hollow microparticle, which can sufficiently meet high-level requirements in these days, for example, improvement in optical characteristics, such as total light transmittance and light diffusing properties, in molded resin articles, and improvement in texture in using, soft-focus effect, persistence and so on in cosmetics a method for producing the same and use of the same.SOLUTION: The irregular-shaped hollow microparticle having a spindle shape as a whole is provided, wherein a plurality of recesses (21) are formed on the surface (11), the interior (31) is equipped with one hollow part (41), and the surface (11) is connected to the hollow part (41) via a cleavage (51) that is elongated along the direction of the major diameter (L1). The average of the major diameter (L1) is 0.1-30 &mum and the ratio of the average of the minor diameter (L2) to the average of the major diameter (L1) is 0.3-0.8.COPYRIGHT: (C)2011,JPO&INPIT【課題】樹脂成形体においては全光線透過率及び光拡散性等の光学特性の一層の向上、また化粧品においては使用感、ソフトフォーカス性及び持続性等の一層の向上等、近年における要求の高度化に充分に応えることができる中空異形微粒子、その製造方法及びその用途を提供する。【解決手段】表面(11)に複数の凹部(21)を有しており、内部(31)に一つの中空部(41)を有していて、表面(11)と中空部(41)とが長径(L1)の方向に沿う1本の割れ目(51)を介して連絡されている全体として紡錘形状の中空異形微粒子であって、長径(L1)の平均値が0.1~30μm、短径(L2)の平均値/長径(L1)の平均値=0.3~0.8であることを特徴とする中空異形微粒子を用いた。【選択図】図2
