Vol.3 No.2 2010

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Research paper : Products and evaluation device of cosmetics for UV protection (Y. Takao et al.)−143−Synthesiology - English edition Vol.3 No.2 (2010) theory (liquid phase method) for the aquatic scattering of nanoparticles and the particle packing model (solid phase method). The result was reflected in the starting composition of the raw material powder[1][21].Figure 7 shows the structural control process of the powder including the composite particle. The slurry, which is a mixture of sericite[15] and nanoparticles, is sprayed (gas phase method), and the slurry is broken down into droplets that contain only a single or several units of sericite and nanoparticles. The droplets are continuously dried or reacted, and the composite particles (Fig. 7(a)) or granules are synthesized where the nanoparticles adhere only to the surface of the ceramic unit particle[1][2][14]-[21]. Figure 7(b)~(d) will be discussed in chapter 4.< Evaluation device for the property of ceramic powder >As shown in Fig. 5(a), the current lubriciousness evaluation technology requires excessive preliminary consolidation, or a state of high bulk density, to resolve the low reproducibility of the side-grinding force due to the instability of the packing density of the powder into the measuring container. This condition is not applicable to the general ceramic powder materials such as cosmetics and electronic fillers, except for some powder unit operation where over-packing may occur as in the case of the hopper[2][14][16].Figure 8 shows the LS approximation model. As shown in Fig. 8(a)~(b), the normal and the side-grinding forces are measured sequentially from 0, whereas in the conventional method, the samples are changed for each condition from packing to consolidation. Next, the gradient, or the angle of internal friction, is calculated using the LS approximation of the normal and side-grinding forces assuming the clone powder (Fig. 8(c)). Compared to the conventional mathematical envelop approximation shown in Fig. 5(a), the new model shown in Fig. 5(b) enables the evaluation of the relationship of the normal and side-grinding forces in wider range from transition to compacting state, and it is a simple evaluation method that reflects the general ceramics process. Currently, this method is applied to the JIS standard powder as well as the materials for cosmetics, fillers, drugs, and foods, to guarantee the reproducibility and reliability as a powder evaluation method, and to confirm the adequacy as a quality control technology[1][2][14]-[21].3.2 Empirical and trial-and-error solution of the social elements< Basic regional industry-government alliance (former technical assistance system) >As shown in Fig. 6, the joint work with the local mica company[15] in the form of technical assistance that suspended the short-term organizational profit was started to add high value to the specialty product (natural minerals) of Aichi Prefecture during the days of the Agency of Industrial Science and Technology in the 1990s, before the Agency became an independent administrative agency. In that process, crises in the alliance were experienced several times Fig. 6 Research roadmap: The chronology of the solutions for the social issues in this research100 µm3 µm10 µmGranulation of planar powderNonoxide spherical powderNormal stressis changedCompact(powder layer)Shear force changes linearly according to normal stress Development since the Agency periodCollaboration with local company, Sanshin Mining IndustryMatching fund“Research on direct heating of nonoxides”FY 2003~2005Technological consultation from over 50 companies so farData on patent for powder processing● 30 patent applications in Japan (14 patented)● 6 patent applications overseas (4 patented)● 3 licensingEstablishment of AIST-approved venture company, Nano Seeds FY 2005Total 300 subcontracts for assessment and clarification of phenomenon for the powder layer and particle surface property, 60 million yen; sales of device, 50 million yen; website access, 10,000 page views/month.Phase 2 completed2010~20092007200820062005200420032002200120001999AIST startsAgency period ‒ The starting point ‒LabelAssessment devices for other fields such as electronics and drugsPigment function (color rendition, lubriciousness)+pharmaceutical function (UV blocking)Market scale 15 trillion yen(1.5 trillion yen in Japan)Cosmetics, product realizationExtender pigment(conventional)(Joint research with Nippon Menard)Jointdevelopmentof sericiteSynthesisLarge pilot-plant-scale manufacturing facilityLarge pilot-plant-scale manufacturing facilityEmployed in the assessment ofelectronic toner of measurementdevice for powder layer shear forceEmployed in the assessment ofelectronic toner of measurementdevice for powder layer shear forcePowder foundationPowder foundationAssessmentPrivate company subcontractproject“Development of powder engineering technology”FY 2007~2009High functionHigh functionPharmaceutical function (UV blocking)Pearl pigment(conventional)LowLowDevelopedpowderPigment function(color rendition, smoothness)Phase 1 completedMETI subcontract project“Research for the development of testing and measurement device for the inter-particular and interface interaction”FY 2007~2009Sales of databaseMarket scale 1 trillion yen(Joint development with AIST venture)

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