Tensile Properties of Used Paper/Recycled LDPE Blends
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The objective of this project is to improve the properties of both paper and Low Density Polyethylene (LDPE). So; this will tend to minimize the amount of the waste paper and LDPE which are harmful to the environment. Recycling of paper was one of the main objectives of this work because there are huge quantities of waste paper produced.During the project period, many experiments were done in order to obtain recycled paper with modified properties. Two statistics were done; the first was about the waste office paper at An-Najah National University which indicates that about 30 tons of waste papers are produced yearly from academic staff offices. The second was about LDPE, where approximate numbers were obtained from local plastic industries; for each 30 ton of LDPE used as raw material for plastic bags; one ton of waste is recycled at the same industrial site, while another ton is discarded because it needs treatment and other processes to be suitable for recycling and reuse.The objectives were achieved through three categories: the first was the recycling of waste paper with or without using of modifying agents, the second by adding the paper to the (LDPE) as filler, and finally by making composite of multiple sheet layers of both materials. In this research it was obvious that:Collected papers can be recycled with a recovery of (77-80) %, and the density was equal to (276.7 Kg/m3).Paper can be used as filler to recycled low density polyethylene up to 10wt% with a slight improvement of modulus of elasticity.Composite sheets of multiple layers with different arrangement give different modulus of elasticity; it could be used in different applications according to its characteristics and shape as in packaging and different constructions.Physical properties of recycled paper (i.e. appearance, coherent, density, modulus of elasticity, etc.) can be improved by different agents, for example modulus of 436 Mpa can be increased to 512Mpa by the use of whey which is a byproduct from dairy products industry.