The effects of filler content, filler particle size and surface coating, as well as the natures of the wax and metal stearate lubricants on the properties of calcium carbonate-filled linear low-density polyethylene compounds were investigated. The elongation at break decreased exponentially with filler loading irrespective of whether the filler was surface coated or not. The corresponding decline in the impact strength was more gradual but it dropped abruptly on reaching a filler loading of 70 wt%. The effect of shear rate on the apparent melt viscosity followed an empirically modified Carreau–Yasuda model which included the effect of filler content. It features the zero-shear viscosity and the flow consistency index as adjustable parameters. These characterize the viscosity trends at low- and high-shear rates, respectively. In the absence of additives, the melt viscosity at 60 wt% filler exceeded that of the neat polymer by a factor of three. Adding 3 wt% wax and 1.0 wt% zinc stearate returned the melt viscosity to levels just above that of the neat polymer. Calcium stearate and magnesium stearate were less effective at reducing the apparent melt viscosity but a blend of the latter with zinc stearate performed particularly well.
VSV GROUP has been becoming the leading company in the fields of manufacturing and exporting of uncoated and coated calcium carbonate powder in Vietnam.
We possess two white limestone quarries in Quy Hop – Nghe An, which ranks among the finest ones in Vietnam, covering more than 45 hectares with a total reverse of more than 30 million tons.
The factory is located at Lot 32C of Nam Cam Industrial Zone in NgheAn province of Vietnam where is only five kilometres from Cua Lo port. In addition, all the production lines are of the most advanced technologies designed, produced and installed by Hosokawa Alpine from Germany. With a gross capacity of more than 20,000 tons/month and storage facilities for up to 10,000 tons, we guarantee customers a steady supply at a world-class standard.
Besides, our qualified staff always focus on innovating and applying advanced methods of production as well as international norms and criteria of customer services. All the working processes and conditions are certified by and strictly applied to the Quality Management System ISO 9001:2015.
Our products have been exported to various countries including India, Bangladesh, Thailand, Brunei, Korea, Hong Kong, Taiwan, Sri Lanka and acknowledged as the best choice by all the customers who used our products in manufacturing plastics, paper, rubber, paints, ceramic, artificial marble, cattle-feed, poultry-feed, cosmetics.
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