Essential Rubber Formulary: Formulas for Practitioners
Authored by a seasoned rubber technologist of four decades, this book gives practical information on compounding techniques, coloring, ingredients, as well as typical rubber testing methods.
TABLE OF CONTENTS Essential Rubber Formulary: Formulas for Practitioners
Chapter 13: Industrial Rubber Rollers
13.1 Introduction
Rubber rollers are required for various industries such as textile mills, paper mills, glass plants, steel mills, printing industries, tanneries, mining, and many other industrial applications. The manufacture of rubber rollers involves special skills and know-how. It involves laying of green rubber sheets on metallic cores to the required thickness, and then the composite is wrapped with wet cotton or nylon tapes and vulcanized in an autoclave under the required pressure and temperature. The wet cotton or nylon fabric gives the wrapping pressure on shrinkage. After curing, the rolls are ground to a smooth finish to the required dimensions. Rolls with compounds of various hardness levels are manufactured as required by users. The rapid growth of engineering and chemical industries worldwide has increased the demand for rubber rollers. These rollers are manufactured from either natural or synthetic rubbers. Readers can compare the roll compounds with respect to the role of sulfur, mineral and black fillers, and accelerators (both organic and inorganic types) and their properties. The formulas given below are named with arbitrary notations for identification.
13.2 Method
Rubber stocks are compounded as per the formulations by mill mixing according to the specific need. The metal cores are sand/shot blasted to give a white metal surface. After blasting, a primer rubber coating with a metal rubber bonding agent is applied to preserve the blasted surface and to ensure better rubber to metal bonding. Then the cores are covered with calendered rubber sheets and wrapped with nylon/cotton fabric. The...
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