Robust coating process for silica glaze material

Razeman, Muhamad Aqram (2021) Robust coating process for silica glaze material. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Silica glaze is the material applied in the coating process for their former or mold glove processing. The use of silica glaze during the processing is because this material is capable to withstand high temperature and inert to the acid reaction. During the manufacturing of surgical glove, the shape of the former as a human hand with the texture of the handgrip, it is important to apply the glaze material because silica glaze can close the rough texture. The surgical gloves manufactured is facing with pinholes problems. The problems are reported to occur due to the powder accumulation in between the former/mold fingers. The powder accumulation comes from the chemical used. The objectives of this project is to evaluate the coating of silica glaze at between fingers former by using Polyvinyl Alcohol (PVA) sponge method to eliminate the surface roughness and to characterize the silica glaze at coated and non-coated former using SEM and XRD analysis.. This project decides to design th e sponge-like small ball because the area that this project wants to coat is very small when the sponge-like small ball is much easier to tap that area only. To get a better surface finish this project cannot use high porosity because the texture of the sponge can translate into a surface finish. To compare the surface roughness before and after apply silica glaze using SEM analysis. XRD is use to compare the material composition before and after apply silica glaze, the peak, intensity and the percentage of the material change, from XRD the concentration of silica oxide of coated former is high compare to non-coated former. Aluminium oxide the concentration and the percentage of coated is high compared to non-coated. SEM image show the surface roughness of ceramic is eliminated and reduced by using this silica glaze. Finally, the former test at production lines it show the good result no powder accumulate and produced good gloves.

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