Oily Surfaces Research Articles

Effect of divalent metal salts of dibasic acid mono (methacryloyloxypropyl) esters on adhesive properties

One part type, solventless acrylic adhesives containing divalent metal salts of dibasic acid mono(methacryloyloxypropyl) esters as one of the monomer components were prepared to investigate the effect of the metal carboxylate group on adhesive properties. The adhesives contained a succinate, maleate, phthalate, or hexahydrophthalate group. The metal in the metal carboxylate group was Ca, Mg or Zn. Adhesive strength was determined using nuts and bolts as adherends. The strength increased markedly with increase in the content of the metal carboxylate group for the succinate or maleate-containing systems. The influence of the metal species was clearly seen for the former systems. Chemical resistance, corrosivity, and adhesive to oily surfaces were also evaluated.

Boots for oily surfaces : Manning, D., Jones, C., and Bruce, M.Ergonomics, 1985, 28.7, 1011–1019

Boots for oily surfaces : Manning, D., Jones, C., and Bruce, M.Ergonomics, 1985, 28.7, 1011–1019

Boots for oily surfaces

A field trial of footwear was commenced 5 years ago to try and find the most suitable boots to prevent slipping accidents on floors contaminated with mineral oil. After preliminary trials nitrile rubber (NR) and microcellular polyurethane (PU) were selected for comparison. Boots soled and heeled with these materials were worn by 12 volunteers for periods of up to 2 years. Friction was measured at intervals throughout the trial by determining the angle of slip on an oily steel plate. Smooth, wet or oily floors caused polishing of the soles, whereas loose metal chippings on the floor roughened the surface and improved friction. Microcellular PU resisted polishing better than NR and had a longer life. In the final phase of the trial, volunteers who had tested NR boots wore PU and vice versa. A direct comparison of the two materials tested by seven volunteers revealed that PU always produced higher angles of slip than NR. Mean coefficient of friction (COF) for PU was 0·26 and for NR was 0·18. The COF of PU bo...

床のすべりおよびその評価方法に関する研究 : その 3 すべり試験機の設計・試作

This paper presents the process of the development of the new slipperiness tester and the performance of it. Based on the concept of a new slipperiness tester reported in part 2, a tester (DRAG TYPE) of which details remained changeable and could be adjusted by the result of the later experiments was first developed. The result of measurement of many surfaces, namely, the pulling load-time curves were analysed to find the physical value which can indicate the degree of slipperiness, and coefficient of slip resistance (C.S.R.) was finally found. C.S.R is defined as Pmax/W; where Pmax is the maximum pulling load, W is the loading weight. Then, the each specification of the tester was able to determined in a certain way as C.S.R corresponds smoothly enough to the subjective slipperiness value on the sensory scale obtained in part 1. Moreover, even in matters of the test on powdery and oily surfaces which were similar to actual dusty and muddy wet ones, the smooth correspondence was also recognized. These results made clear that the newly developed tester can be regarded as appropriate for measuring the slipperiness of actual floors.