Although defoaming is generally accomplished by centrifugal method, it is difficult to remove small bubbles from pseudoplastic fluid. Here, we developed a rotation-revolution mixer as a new defoaming device for pseudoplastic high viscosity gel. As a result, regardless of the number of bubbles, defoaming was completed in several tens of seconds. In order to clarify the mechanism of the defoaming, the rotation-revolution operation was carried out when a red dyed gel was added on the upper part of the liquid surface. The whole gel was stained red while the red gel remained at the same place in the case of the centrifugal method. This result shows that a flow for agitating the entire interior of the container is generated during the rotation-revolution operation.

Highly purified orange roughy oil is a marine natural wax ester oil consisting of esters of higher fatty acids and higher alcohols, and in the properties, it is known to be very similar to jojoba oil which is a typical botanical natural wax ester oil of cosmetics. In this study, the differences in the performance of these wax ester oils as cosmetic ingredients have been investigated in detail.

Orange roughy oil has a lower viscosity, higher polarity, and lower surface tension in comparison to jojoba oil. However, it is difficult to detect the difference in their textures when they are applied to the skin by these subtle differences. On the other hand, the differences in their properties become more pronounced when they are mixed in with cosmetic products. Oily gels prepared using beeswax was found to have a softer texture, and the liposome lotion including orange roughy oil efficiently suppressed water transpiration ability from the skin. Furthermore, as an O/W type emulsion, it demonstrated excellent spread ability on the skin and a milky lotion having a light and smooth application feeling was obtained.

Shear strain method viscometers are widely used to evaluate fluid rheological properties. However deformation is defined not only by shear but also extension. According to the actual flowing phenomenon, providing an appropriate deformation on the tested material is essential for precise evaluation.

The present paper describes the measuring principle of the capillary breakup method rheometer, which enables ones the measurement of fluid extensional viscosity with some case studies explaining the definitions of shear and extension and how they relate to each other.

Nowadays the performance, quality, lifetime and most important reliability of many technical products is affected by the adhesion grade of applied coatings and adhesives on the substrate materials. However, due to production related contaminations and/or low surface free energy of the materials, the surface state of the substrate is often inappropriate to be direct bonded, coated or painted. Thus, these surfaces have to be pretreated correspondingly, e.g. cleaned and/or activated, in order to promote the desired adhesion formation.

Along with the increasing use of hybrid-materials in automobile production, aircraft structures as well as new electric engines and high power electronics, classical wet-chemical pre-treatment processes are often no longer applicable. To improve the quality and long term stability of the adhesion on different substrates, atmospheric pressure plasma (APP) jets can play a key role for many industrial applications. The activation of polymers due to the formation of hydrophilic functional groups, e.g. on thermoplastic materials, the removal of instable oxide layers, e.g. from copper lead frames, and also the precision cleaning for the removal of thin contaminations are typical applications of APP-Jets nowadays. The variety of available jet systems allows high speed treatments faster than 100m/min but also handheld applications for repair and small batch production of thermal sensitive materials. The aim of the paper is to show the spectrum of typical APP-Jets and to give an overview on possible technical applications.

Surfactants, which are one component of dish washing detergent, have changed with the times and needs. In the 1960s, anionic surfactants which have high detergent ability, were the main components of dish washing detergent. In the 1970s, the combination of an anionic surfactant and an amphoteric surfactant enabled high detergency and mildness. Recently the functions of “quick washing” and “slipless” were added to detergents.

These topics are discussed here from the viewpoint of spontaneous emulsification and structural viscosity.

Man-made disasters caused by the negligence of chemical safety officers of workspaces will always occur without fundamental measures for the administration of safe control of chemicals. Responding to the repeated incidence of chemical accidents, in September 2012, the congress passed, the 「Act on the Registration and Evaluation, etc. of Chemical Substances」 and the 「Chemicals Control Act」 to replace the previous「Toxic Chemicals Control Act」 based on the experience of responses to the EU REACH regulation. This paper describes the background of chemical regulations, domestic chemical accidents and the problems on regulation in Korea.