Unplasticized polyvinyl chloride (UPVC) pipe industry of Pakistan: Few suggestions to improve the finishing and the strength of the pipes while reducing the production cost | [Sixth International Conference on Sustainability in Process Industries (SPI) 19-20 Octover 2022 (Book of Abstracts) • 2022]

Author(s):

1. Hamza Ahmad: Department of Chemical Engineering, University of Engineering and Technology,Peshawar,Pakistan

2. Bilal Ahmad: Department of Chemical Engineering, University of Engineering and Technology,Peshawar,Pakistan

3. Sheharyaar Khan: Department of Chemical Engineering, University of Engineering and Technology,Peshawar,Pakistan

4. Hammad Ismail: Department of Chemical Engineering, University of Engineering and Technology,Peshawar,Pakistan

5. Naseer Ahmed Khan: Department of Chemical Engineering, University of Engineering and Technology,Peshawar,Pakistan

Abstract:

Polyvinyl chloride (PVC) resin is polymerized to produce a variety of plastic materials. Worldwide about 40 million tons of different PVC products are produced annually. Unplasticized Polyvinyl chloride (UPVC) are rigid plastics prepared from the polymerization of the same PVC resin. In Pakistan, UPVC pipes are very commonly used as sewer and water pipes. Our industries use calcium carbonate (CaCO3) mineral as a filler during the polymerization of the resin. Filler replaces some part of the expensive PVC resin and thus decreases the cost. On the other hand, if the concentration of calcium carbonate (CaCO3) increases from 10 PHR the net weight (specific gravity) of the pipes increases. Moreover, if added than a certain concentration the produce pipes may not retain the required mechanical strength. The handling of the viscous polymerized mixture is difficult and creates difficulties in processing. In short, the addition of calcium carbonate reduces the overall cost but it adversely affects the specific gravity and other mechanical properties.Our study was about the possible fillers having less effect on the specific gravity and can improve the smoothness of UPVC pipes at a minimum cost. We propose a mix of organic (corn starch) and inorganic (aluminum trihydride) fillers. Organic fillers have less weight (specific gravity) and are usually cheap. Polyethylene wax (lubricant) will improve the smoothness and overall finishing quality of the pipe. The use of these types of lubricants facilitates in flowing processing and increases the chances of uniformity in the polymerized chains.

Page(s): 0-0

DOI: DOI not available

Published: Journal: Sixth International Conference on Sustainability in Process Industries (SPI) 19-20 Octover 2022 (Book of Abstracts), Volume: 0, Issue: 0, Year: 2022

Keywords:

Calcium carbonate , CaCO3 , Parts per hundred rubber PHR , Unplasticized Polyvinyl chloride

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