People are more focused on products and technologies that are friendly to the environment
than ever. With climate change at the front of many political debates, people want to be sure
the products they’re using aren’t harmful to the environment and don’t pose any health
risks when using.
One industry that takes a lot of flack from those concerned about the environment is the
plastics industry. That is because of its reliance on fossil fuels and those mountains of
plastic waste all over the planet.
But not all plastics are created equal, and in this piece, we look at polyurethane and
answer the question: how environmentally friendly is it?
Polyurethane vs Plastic or
First, let’s get the answer out of the way and then look into the specifics. Yes,
polyurethane, like PU
sheet is inherently more eco-friendly than most other plastics. It also doesn’t
contain any chemicals that interfere with endocrine and hormone systems, nor does it
contribute to PH change in soil or water.
But what about all that plastic waste we see in photos almost everyday? Note that most of
the plastics in the shocking photos are thermoplastics, which account for over 95% of the
waste seen in the oceans.
In contrast: polyurethane plastics account for less than 2%.
Stated by urethane manufacturers, one reason for this low level of waste is that
polyurethane lasts far longer than most thermoplastics. This means industries that rely on
polyurethane products aren’t throwing those products out as often because of wear.
Another advantage is that there are a variety of directions one can take to recycle
polyurethane parts back into prepolymer constituents
from which they were made.
Also, scientists use microorganisms to break downcast urethane products, and once in the
environment, casting
polyurethane prepolymer aren’t toxic to the environment as they break down. These
facts make polyurethane more environmentally friendly plastic.
The manufacturing process
Okay, so polyurethane itself is better for the environment, but what about the process of
making this plastic? Isn’t it just as bad for climate change and the environment as other
plastic manufacturing?
Many polyurethane manufacturers work hard to minimize the impact on the environment by
optimizing the manufacturing process and becoming more energy efficient.
Also, today’s polyurethane manufacturers like Sabic continue to work closely with
polymer-machine producers to make casting systems that reduce the amount of waste coming from
the manufacturing process.
Note that advancements in 3D printing and simulations of how materials flow through molds
mean that engineers can design molding systems that drastically reduce the amount of waste
material produced.
Being able to reclaim parts and re-use existing metal components means that you can
refurbish polyurethane cast parts, which is not as easy to do with other products. Some metal
components can last virtually a lifetime as long as the urethane section is upgraded when
needed.
So, for instance, a wheel hub may have a lifespan of over 30 years, which benefits the
environment by not having to manufacture parts as often.
Lastly, the polyurethane industry as a whole continues to work towards improving the
end-of-life phase of their products to increase sustainability.
We can see that the industry is making significant progress towards increasing the amount
of material that’s recovered and recycled and reducing what goes into landfills.
How polyurethane helps the environment
While opponents point out that polyurethane manufacturing uses fossil fuels such as oil,
which contributes to climate change, what they fail to mention is how the polyurethane
products themselves fight against climate change and benefit the environment.
First:
Polyurethane products, such as hot casting polyurethane prepolymer, are
effective insulators, which improves the energy efficiency of buildings, thus reducing the
energy required to heat and cool, and consequently lowering carbon emissions.
Second: polyurethane products make vehicles more fuel-efficient because they’re lighter
than other materials.
Another example where polyurethane benefits the environment is in the use of domestic
refrigerators which use polyurethane as an insulator to increase energy efficiency. Improving
energy efficiency goes a long way to reducing carbon emissions and the effects those have on
climate change.
Lastly, in many places, polyurethane waste is used to generate power for solid waste
incineration thus reducing the need for fossil fuels.
Polyurethane is an extremely versatile material and is used in a variety of industries
and applications from automotive to furniture, bedding, appliances, construction, and more.
What makes polyurethane so attractive are its longevity and energy efficiency, both of
which have positive impacts on the environment and the effects of climate change.
Also, what does end up going to waste is non-toxic and won’t damage soil or water. As
the polyurethane industry moves forward, it continually develops new ways to reduce the
amount of waste it produces and to increase the energy efficiency of the manufacturing
process.
Properties of casting
polyurethane elastomer
Technical characteristics of polyurethane make it an indispensable structural material in
many industries where products must have high resistance, wear resistance, resistance to
aggressive environmental influences.
The density of the polyurethane depends on its type, indicators can be in the range of
30-300 kg/m3.
Polyurethane has a wide range of hardness from very soft, like a gel bicycle seat (~25
Shore OO), to very hard, like a bowling ball (~75 Shore D). But the sweet spot for many of
its performance properties occurs from 55 Shore A to 75 Shore D.
Polyurethane has an extensive operating temperature range, from -60 to +80 °C, short-
term use at + 120-140 °C is possible without loss of technical characteristics.
Polyurethane has high elasticity with high hardness of the material, its strength
indicators reach up to 50MPa. It can stretch up to 650% without damage.
Polyurethane does not conduct electricity.
Polyurethane has a low weight, which gives an alternative to using products with a lower
weight.
Ozone resistance is also a definite plus, polyurethane does not collapse under the
influence of ozone, such as rubber.
Polyurethane is highly resistant to acids, oils, solvents.
The main competitors of polyurethane are rubber, plastic and metal.
Compared to rubber, polyurethane has higher wear
resistance and elasticity, is not susceptible to oils, gets dirty less, ages more slowly,
takes shape more quickly after deformation and better tolerates mechanical stress.
If we compare polyurethane with metal, it is obviously more flexible, has less weight,
does not conduct electricity and is less susceptible to abrasives. Polyurethane is also much
cheaper to manufacture and maintain, mechanisms equipped with parts from this material create
less noise. All this affects the quality and cost of the final product.
In comparison with plastic, polyurethane shows better results at high and low
temperatures, it is more flexible, does not crack under shock and other mechanical stress.
Choosing a reliable urethane product manufacturer can be difficult, but TPC Inc. team
makes it easier. If you have any questions about urethane and polyurethane solutions, don’t
hesitate to get in touch with them here.
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