The natural rubber industry products have a large demand globally for their various uses in

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The natural rubber industry products have a large demand globally for their various uses in different applications. Rubber is used to manufacture products in every field, from automobile parts, medical devices, plumbing, electrical, stationary, etc. India is ranked third in the world producers of natural rubber [4]. In the Dakshina Kannada region of Karnataka agriculture is one of the main occupations of the locals. Rubber, Arecanut, Paddy, Coconut, etc., are commonly grown in this region of which the rubber industry is the most polluting. The rubber industry pollutes through the wastewater generated during manufacture and also air emissions depending on the drying process adopted. The rubber industry is vast as it consists of farms,…show more content…
The liquid latex contains around 60% of dry rubber and it varies with the climate, i.e. the water content in the latex increases during the monsoon season.The latex is used to produce five main products, namely Ribbed Smoked Sheets (RSS), Air Dried Sheets (ADS), Block Rubber, Crepe Rubber & Concentrated Latex. These products are further used to produce other rubber products for various applications such as tyres, gloves, insulations, tubes, etc. In Dakshina Kannada region, Ribbed Smoked Sheet & Air Dried Sheets are the commonly produced of the five types, and are similar except for the method adopted for drying. These are produced from small scale farms to large scale plantations. 1.2.1. RUBBER SHEET MANUFACTURING PROCESS: In the production of Ribbed Smoked Sheets and Air Dried Sheets, latex from the trees is carried back to the rolling house for processing. In certain cases where the plantation is located far away from the rolling house, ammonia is added to the latex to prevent early coagulation. Early coagulation of rubber particles before the processing stage leads to the production of low grade sheets and hence an economic loss. If ammonia is added to prevent early coagulation, then higher amounts of acid are required during the coagulation stage. At the rolling house the latex is mixed with water in a ratio of 2:1 to improve its consistency, and formic acid (5ml each tray) which helps in coagulation. A mixture of 2 litres rubber

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