EFFECT OF PROCESSING PARAMETERS ON MECHANICAL PROPERTIES OF LINEAR LOW-DENSITY POLYETHYLENE FILM
Journal Title: Academic Research International - Year 2012, Vol 2, Issue 3
Abstract
Optimization of extrusion conditions is critical to the production of polyethylene films with good mechanical integrity. Yet past studies on the mechanical properties of polyethylene films have neglected the significant effect of critical extrusion conditions. Much of the research into the mechanical properties of polyethylenes, have been limited to the effect of conventional processing parameters such as temperature and pressure. The present study investigates the effects of blowup ratio (BUR), die gap and output rate on mechanical properties of blown Linear Low-Density Polyethylene (LLDPE) films. The mechanical properties examined were impact strength, tear strength and tensile modulus. It was observed that there was an increase in impact strength, while tensile modulus decreased with increasing BUR. The increase in impact strength was attributed to film orientation in the transverse direction which improved with increasing BUR. In contrast, the observed decrease in tensile modulus was due to poor film orientation in the machine direction which was more pronounced with increasing BUR. At the narrowest die gap (1.27mm) and lowest BUR (2.0), the transverse direction (TD) tear strength showed a decrease at high output rates, but increased sharply at high output rates for all the resins. However, at both the low and high output rates, no dependence of the transverse direction (TD) tear strength on the intermediate die gap (2.03mm) was observed. The results show that the extrusion parameters studied are critical factors that determine film orientation and ultimate mechanical properties and, should be carefully controlled when extruding films from Linear Low-Density Polyethylene (LLDPE) resin.
Authors and Affiliations
G. Onyeagoro
Keywords
Related Articles
- EP ID EP135368
- DOI -
- Views 108
- Downloads 0
The Participation of Micro Business Affinity Group Members in the Implementation of Food Self-Sufficiency Action Program in Lampung Province
The objectives of research were: (1) to analyze the participation level of affinity group (AG) members in food self-sufficiency village action program (FSSVAP) in Lampung Province, (2) to analyze the factors affecting si...
FUZZY STABILIZATION OF A COUPLED LORENZ-ROSSLER CHAOTIC SYSTEM
This paper reports the stabilization of a novel system realized by additively coupling the Lorenz and Rossler chaotic systems. The structural dynamics of the novel system is distinctively different and topologically...
ON THE NUMBER OF LIMIT CYCLES OF CERTAIN POLYNOMIAL SYSTEMS
In this paper, we consider two dimensional autonomous system of the form: ( ) ( ) , , x P x y y Q x y = = & & (A) in which P and Q are polynomials in x and y. We write the system A in the fo...
The Influence of Trade Unions on the Welfare of Production Workers in East Java
The purpose of this study was to determine the influence of trade unions on the welfare of production workers in East Java. In this study as the independent variable is the trade union and the dependent variable is the w...
USING OF ARAMID FIBRES REINFORCED POLYSTYRENE FOR MANUFACTURING AUTOMOTIVES PARTS
The present research aim to study the effect of the reinforcement by fibres on mechanical properties of composite material consist of polystyrene resin reinforced by aramid fibres which can be used to manufactures auto...