The main objective to introduce the ABS (Acryonitrile Butadyne Styrene) plastic substrate in place of RTDuroid substrate for microstrip filters is to reduce the cost. The cost of plated ABS plastic substrate is substantially less (Rs. 4/sq.inch) compared to the cost of RT-Duroid (US$ 02/-/sq.inch). Two microstrip (hairpin line) band pass filters at 1537.5 MHZ and 1575.42 MHz have been developed...

Hertzian contact damage is studied in porcelain coatings (thickness range 250 μm to 1 mm) over a Ni–Cr alloy substrate, and glass coatings (thickness range 160 μm to 1 mm) on polycarbonate polymer substrates. Both planar and non-planar geometries are considered, subjected to indentation by spherical indenters of various sizes (radius range 2 mm to 8 mm). Finite element analysis is carried out t...

A preceding study of contact damage in a bilayer system consisting of a porcelain coating on a stiff Pd-alloy substrate is here expanded to investigate the role of substrate modulus and hardness. Bilayers are made by fusing the same dental porcelain onto Co-, Pd-, and Au-alloy metal bases. Indentations are made on the porcelain surfaces using spheres of radii 2.38 and 3.98 mm. Critical loads to...

An ultra-low anti-reflection optical coating on both surfaces of a plastic cover slip was studied for use in confocal image measurement. The optical reflectance at a wavelength of 632.8 nm was less than 0.1% when the coated sample was placed in a liquid having a refractive index of 1.34 close to the aqueous solution of the biomaterial. The highand low-index coating films, Substance-2 (PrTiO3) a...

Three kinds of UV-curable organically modified silicates have been prepared to be used as protective coatings for optical fibers. The synthesis involves the reaction of the thiol group of 3-mercaptopropyltrimethoxysilane with a C =C bond in one of the acrylic groups of three commercially available aliphatic triacrylates. The methoxysilyl groups of the synthesized diacrylate methoxysilanes were ...

A new synthesis and processing route for preparing multilayer interference coatings on plastic substrates has been developed. For this purpose, alcoholic sols of surface modi®ed (3 glycidoxypropyltrimethoxysilane, GPTS) SiO2 and TiO2 particles with sizes of 10 and 4 nm, respectively, were synthesized. Layers were prepared by dip coating, subsequent UV curing (2.1 J/cm) and thermal post treatmen...

This study investigated the effect of board type (unmodified vs. MAPE modified) on the surface quality and thickness swelling-water absorption properties of recycled high density polyethylene (HDPE) based wood plastic composites. Additionally, two commercially available coatings (cellulosic coating and polyurethane lacquer coating) were also applied to composite surfaces and their adhesion stre...

This article looks into the possibility of transmitting different colours in 3D-printed lamps using thicknesses plastic. During this work, an experimental stand was created to review quality, structure, colour and translucency printed elements. The analysis decorative properties plastic depending on environment carried out. determined such characteristics coating as colour, saturation, purity w...

Multilayer plastic films provide a range of properties, which cannot be obtained from monolayer films but, at present, their recyclability is an open issue and should be improved. Research to date has shown the possibility of using whey protein as a layer material with the property of acting as an excellent barrier against oxygen and moisture, replacing petrochemical non-recyclable materials. T...