Tensile Properties of Used Paper/Recycled LDPE Blends Prepared by:
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Transcript of Tensile Properties of Used Paper/Recycled LDPE Blends Prepared by:
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Contents
• Problem Description• Objectives• Definitions• Experimental Work• Results and Discussion• Conclusion• Recommendation
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The Problem
• Huge amounts of waste paper are produced
from schools, universities, libraries, printing
centers, ...etc.
• Large amounts of waste LDPE produced from
local industries.
• The non biodegradability of LDPE.
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Objectives
• Reduce the amounts of waste paper and LDPE
which pollute the environment.
• Improve the properties of both paper and Low
Density Polyethylene such as modulus of
elasticity, ductility and others.
• Enhance the biodegradability of LDPE.
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Definitions
• Paper is a material composed of fibers that is
converted to pulp and then to compact web,
pressed and dried.
• Low Density Polyethylene (LDPE) is a
thermoplastic made from oil. It is a highly
processable material which is unreactive at
room temperature and has low density.
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Cont… (Definitions)
• Whey: is a byproduct from dairy industry such
as yoghurt and labaneh.
• Modulus of elasticity: is a measure of the material resistance to elastic deformation.
• Ductility: is the ability of material to withstand plastic deformation up to fracture.
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Blending of paper and LDPE
Recycling of paper
Statistical study of waste
amount
Testing
Experimental work
AppearanceDensityTensile test
With paper as particles
As composite sheets
Usingsimple techniques
Adding modifying agents
Experimental Work
Different products
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Cont… (Experimental Work)
• Tensile test:
This test was done by
using Gunt Hamberg 310
WP apparatus, which was
used to find modulus of
elasticity and ductility as
percentage of elongation.
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Cont… (Experimental Work)
Density:
Was measured for the produced recycled paper
by taking a small sample and measuring its
mass to volume, this was done for three trials.
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Cont… (Experimental Work)
Appearance:
Softness, shining, color and coherence were
observed for the papers produced.
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Recycling ProcessCollection of Waste Paper
Paper Pulping
Cleaning and Screening
Water
Final Product
Drying
Pressing
Dirt Water
Waste Water
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Results & Discussion
From the statistical study:
• 30 tons of waste paper are produced yearly
at An-Najah National University.
• One ton of waste LDPE is produced from each
30 tons raw material in the local plastic
industries.
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Cont… (Results & Discussion)
Recycled papers:
• The recovery of the produced recycled paper
was in the range of (77-80) wt%.
• Density of the produced paper was equal to
(277 Kg/m3).
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Cont… (Results & Discussion)
• Improvement of paper’s modulus of elasticity
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Cont… (Results & Discussion)
Paper and LDPE:
• Recycled paper has (436Mpa) modulus of
elasticity higher than (262Mpa) for LDPE; this
means that if these two materials mixed together,
the new product will have better characteristics, as
shown in the following figure.
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Cont… (Results & Discussion)
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Cont… (Results & Discussion)
• Blending of paper and LDPE:
Paper as particles
As filler to LDPE, paper can be used up to
10% as weight percent as shown in the
following figure:
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Cont… (Results & Discussion)
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Cont… (Results & Discussion)
• The relationship between ductility and the
paper percentage is shown in the following
figure.
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Cont… (Results & Discussion)
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Cont… (Results & Discussion)
Paper as sheets:
• Paper and LDPE can be used as composite
sheets of multiple layers which can be used in
many important applications.
• For this case, the improvement of modulus of
elasticity doesn’t depend on the percentage of
paper only, but also on the sheets arrangement.
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Cont… (Results & Discussion)
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Cont… (Results & Discussion)
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Cont… (Results & Discussion)
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Applications
• The produced recycled paper has many types
of applications such as cartons, toilet paper,
egg cartons and boxes for packaging.Toilet PaperCarton
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Cont… (Applications)
• Sheets of recycled paper/LDPE have a wide
range of uses such as:
Handling bags, packaging material, cartons or
boxes for transportation of goods and it could
be used as a construction material.
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Related Studies
Paper/LDPE composite sheets Cardboard composite panels
Raw material Waste paper and recycled LDPE Recycled cardboard, LDPE,aluminum sheets
Product Recycled paper, composite sheets of the above two materials
Composite panels
Uses and applications
Paper: Cartons, toilet paper, egg cartons and for packaging as boxes.Sheets: Handling bags, as construction material and in isolation systems.
Furniture manufacture, flooring,roofing, dividing walls, and kitchen cabinets.
Comparison with other previous study:
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Cont… (Results & Discussion)
Paper/LDPE composite sheets Cardboard composite panels
Findings Paper could be used as filler to LDPE, also they could be used as composite sheets.This will improve the physical properties and increase the biodegradability of LDPE.
composite cardboards overlaid with veneers could be considered as an alternative raw material with accepted properties to be used in furniture applications
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Conclusion
• About 30 tons waste office paper is produced from An-Najah National University yearly.
• A recovery with a range of (77-80) % can be achieved from paper recycling.
• The density of the recycled paper produced was about (277 Kg/m3).
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Cont… (Conclusion)
• Modulus of elasticity has a 17.4%
improvement, and other properties of recycled
paper can be improved by the addition of some
modifying agents such as whey.
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Cont… (Conclusion)
• Paper can be used as filler to LDPE up to 10%
as weight percent.
• Composite sheets of paper and LDPE can be
used in many important applications.
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Recommendation
• Starch can be used in the process of paper
recycling to increase the absorbency of paper
surface.
• The squeeze of waste fruits and vegetables
may cause gelatinization of paper, and so give
less absorbency of its surface.
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Cont… (Recommendation)
• Heating of paper pulp during the recycling
process facilitate the deinking and discoloring
of paper.
• Carbonizing of waste paper can be done for
many purposes such as a source of energy or
to blend it with recycled LDPE.
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Cont… (Recommendation)
• Waste paper could Also be used as thermal
isolation material.
• Small particles of waste paper can be merged
with LDPE in the extruder, but drying should
be obtained before each process.
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Cont… (Recommendation)
• Biodegradation of Waste paper produces
methane gas which could be used as fuel.
• Further experiments with different values of
temperature and pressing period of composite
sheets may give wider range of better results.
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Huge amounts of waste paper
Huge amounts of
waste LDPE Non
Biodegrad-ability of
LDPE
Reduce amounts of
wastePropereties improvment
Increase biodegrade-
bility of LDPE
Problem
ObjectivesSolution
Recyclingof paper
Using modifyingagents
Blending ofPaper & LDPE