This paper describes newly developed polishing pads for glass finishing that employs an epoxy resin instead of a conventional polyurethane resin. The porosity of the polishing pad was controlled by changing the amount of a chemical foaming agents mixed with a prepolymer epoxy resin. It was found that the removal rate of glass surface using epoxy polishing pad was approximately two times higher than those using urethane polishing pad, which means a 50 percent decrease in a usage of CeO 2 abrasives. The waviness and edge roll-off of polished glass surfaces were markedly improved by utilizing epoxy polishing pads, while the surface roughness of glass surfaces finished by epoxy pads was comparable to that finished by urethane pads. The investigation of substitute abrasive materials exhibited that the CeO 2 abrasives were completely substituted for ZrO 2 abrasives. The mechanism of higher removal rate of epoxy polishing pads was also investigated using measurement of contact angles, sliding angles and dynamic friction coefficient of polishing pads. These measurements indicate that abrasive grains are supported more strongly on the epoxy polishing pad than on the urethane polishing pad, namely, higher relative velocity between workpiece surface and abrasive grains to be obtained.
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This study is aimed to consider the regenerative method viewed from the relationship between the housing stock and the distribution of facilities in and around Kozoji Newtown. As the results we found that more people tend to live around the Newtown because more numbers of commercial facilities has been located around rather than within the Newtown. It causes that the Newtown has remained an only residential town because facility location is legally or as some rules restricted in the most of the areas except the center area. Therefore we consider that it is important to give each area some added value and attractiveness by promoting commercial use in UR rental housing blocks or detached housing areas in order to increase the numbers of new residents in the Newtown.
This study is aimed to consider about appropriate location of facilities viewed from the relationship between planned facilities and naturally occurring facilities in Kozoji NT. We investigate the distribution and the transition of both facilities in each region within the NT and at the same time get the opinions about the facilities in the residential area among facility owners, the users and the inhabitants through the questionnaire survey and interviews with them.The results we found are as follows.1. Supply of groceries and daily necessities are most demanding around inhabitants' homes because most of planned neighboring centers were not constructed.2. Particularly young generation feels disappointed with service contents and assortment of facilities around their homes.3. Naturally occurring small restaurants, cultural classrooms and medical facilities have become a place of communication and purpose in life among the inhabitants.Therefore we need to make the legal and UR Agency's regulations of the facility location less strict in the residential areas.
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