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Sustainability

Features of Delrin®

Delrin®: the ultimate in sustainable acetal technology

If you are an injection moulder or extruder of acetal and want to become more sustainable, you may be considering how best to reduce your plastic usage / polymer content and CO2 footprint. Delrin® homopolymer acetal provides a full circle solution to designing and manufacturing products with sustainability in mind.

Full circle sustainability

Sustainability needs to be considered throughout every stage of the product manufacturing process e.g. carbon emissions, water usage, waste products etc. This is better known as the Life Cycle Assessment (LCA). LCA covers the entire product journey: from the initial point of creation (cradle) to the point the product is finally disposed of (grave). The total picture depicts the true environmental impact of a product.  

DuPont™, a true science led business, has looked at every angle and detail of Delrin® homopolymer in order to conduct its sustainability assessment using a cradle-to-gate LCA in accordance with ISO 14040/ 14044 methodology.

CO2 production with Delrin® homopolymer acetal

According to data provided by DuPont™, when being produced Delrin® acetal produces less CO2 than other engineering polymers. In fact, Delrin® produces roughly the same CO2 as renewable products such as PLA, whilst also delivering incredible mechanical properties.

Delrin CO2

Circular economy and recycling Delrin® acetal

When recycling polymers, not all the regrind generated can necessarily be reused. Sometimes there are limit caps of an average of 30% weight vs virgin resin. Even with such caps, regrind polymer material sometimes needs to be disposed of due to its sensitivity to the recycling process (e.g. detrimental water uptake effects).

With Delrin® acetal, 100% of the waste regrind can be used, even after five passes (moulding, regrinding etc.), with minimal impact on its properties.

Some polymers suffer from degradation when recycled, impacting the melt flow rate (which increases), tensile modulus (which reduces) and impact strength (which reduces).

Delrin recycling

Delrin® – using the mechanical advantage to be sustainable through design

By taking advantage of the mechanical advantage and extra rigidity of Delrin®, you can save money, processing time and become more sustainable.

Take an example of a cantilever clip which relies on deflection and spring forces. Designs with copolymer will need to be thicker to match the spring back engagement Delrin® can provide. The higher flexural and tensile modulus of Delrin® means you can design parts that use less plastic (by up to 20%), thus becoming more sustainable. If you choose Delrin® and design your cantilever clip thinner, for every 0.5mm of thickness reduced, you could save circa 4 seconds of hold pressure time.

Leverage the power of Delrin® in order to:

  • Reduce your part weight
  • Reduce your material spend
  • Reduce your cycle times
  • Increase your moulding time capacity
  • Become sustainable through design
Delrin sustainability

Explore other features of Delrin®

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