ABSTRACT Flexible polyurethane foams atomic number 18 foams enkindled from long chain, quietly pronged polyol reacting with di-isocyanate to form an open celled structure with free wrinkle during flexure. It tolerate be classified as a cellular tractile and its constituents are: polyol, toluene di-isocyanate, additives and blowing agent. Additives play a major(ip) fictional character in polyurethane foams as these are added to foam in range to improve its chemical, mechanical and corporeal properties. Examples include: catalyst, modifiers, surfactant, wiry glass, dyes and pigments. Since the major interest of flexible foam is for cushioning and other(a) upholstery materials and for these reasons, the load-compression characteristics are of great importance. The optimum level of additives is obtained by variable additives (tin salt) over a range of values to produce fin different samples. Each of these sampl es mechanical properties: density, tensile distinctiveness, hardness, wedge strength and strength are determined.
TABLE OF CONTENT name page i Letter of transmittal ii wind i ii Table of Content ! iv careen of Figures heptad List of Table viii CHAPTER ONE INTRODUCTION 1.1Background 1 1.2Aims and Objectives 2 1.3Scope...If you want to get a full essay, order it on our website:
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