흑색 저반사막, 및 적층체의 제조 방법

• Main Author: TANAKA NAOHIRO
• Format: Patent
• Language: Korean
• Published: 12.08.2020
• Subjects: APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PERFORMING OPERATIONS; PHYSICS; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; SPRAYING OR ATOMISING IN GENERAL; TRANSPORTING

본 발명은, 정반사 및 산란반사 모두가 작고 저반사성이 우수하며, 표면이 충분한 평활감을 갖고, 흑색도가 높은 흑색 저반사막을 제공한다. 본 발명의 흑색 저반사막은, 공극률이 50%이상의 다공질 흑색 안료와 바인더 성분을 50:50~100:0의 체적비율로 포함하고, 표면의 거칠기 파라미터인 Rt, Ra는, Rt가 0.15~5μm, Ra가 0.01~0.5μm이며, L* 값이 20이하이고, 400~700nm에 있어서, 정반사율의 최대 값이 0.8%이하, 산란반사율의 최대 값이 2%이하, 광 투과율의 최대 값이 5%이하이다. The present disclosure provides a low-reflectivity black film having an excellently low reflectivity due to small regular reflection and small scattering reflection, and having a sufficiently high level of smoothness on its surface and a high degree of blackness. The low-reflectivity black film according to the present disclosure includes a porous black pigment having a porosity of 50 % or larger and a binder component at a volume ratio of 50:50-100:0, in which, with regard to surface roughness parameters Rt and Ra, Rt is 0.15-5 µm and Ra is 0.01-0.5 µm, an L* value is equal to or smaller than 20, and in a range of 400-700 nm, the maximum value of regular reflectivity is equal to or smaller than 0.8 %, the maximum value of scattering reflectivity is equal to or smaller than 2 %, and the maximum value of light transmittance is equal to or smaller than 5 %.