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THE EFFECT OF MULTIPLE PROCESSING OF POLYPROPYLENE ON SELECTED PROPERTIES OF INJECTION MOULDED PARTS
 
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1
Lublin University of Technology, Department of Polymer Processing, Nadbystrzycka 36, 20-618 Lublin, Poland
 
2
Technical University of Kosice, Katedra strojárskych technológií a materiálov, Mäsiarska 74, 040 01 Košice, Slovakia
 
 
Publication date: 2016-12-01
 
 
Corresponding author
Karolina Głogowska   

Lublin University of Technology, Department of Polymer Processing, Nadbystrzycka 36, 20-618 Lublin, Poland
 
 
Adv. Sci. Technol. Res. J. 2016; 10(32):65-72
 
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ABSTRACT
An injection moulding machine was used to produce injection moulded parts from polypropylene under invariant injection moulding conditions. Part of the injection mouldings were shredded and re-processed up to fifteen times. The mouldings and the shredded plastic were tested for selected strength properties: Young's modulus, maximum tensile stress, breaking stress, strain at maximum stress, strain at break, Shore hardness, impact strength, mass flow rate, and longitudinal and transverse shrinkage. Relevant relationships were identified and conclusions were drawn on the basis of the data obtained.
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