Additives for PA and PET Recycling

Additives for the recycling of engineering thermoplastics Mixture of functional additives for recycling PA, PET and other engineering thermoplastic waste.

Besides being environment friendly and reducing CO2 emissions, PA, PET and other ETP recycling can be an important factor of increased profitability for compounders and processors. This should be an enticer further to world Directives such as the Waste Framework Directive objective of achieving 50% recycling by 2020 in the E.U.
However, regranulation alone is not sufficient to meet high value requirements mainly due to:

  • Degradation and unsuitable molecular weight
  • Discoloration (Thermo-oxidative damage)
  • Unsuitable processing behavior
  • Inability to match mechanical properties
  • Missing performance additives
  • Various incompatibilities

Therefore, specialty additives - such as Processing Auxiliaries, Heat and Light Stabilizers, Antioxidants, Modifiers - are required to modify the recyclate properties specifically to meet the requested properties of virgin resins.
This is particularly important as recycling can greatly increase profitability of PA and PET compounders and processors as is shown in this graph:

increased profits for PA recycling in the automotive industry

BRUGGOLEN® additives for PA and PET recycling


Mixture of functional additives
  • Fast melt flow
  • Short cycle time, fast crystallization
  • Good mould release
  • No yellowing – efficient processing stability
  • Good mechanical properties
  • (Tensile strength, E-modulus, ...)
  • Reduced warpage in glass-fiber reinforced grades
  • High dimensional stability
BRUGGOLEN® M1251 Modified polyamide for chain extension
  • Linear chain extension, no cross-linkage
  • Reproducible increase of molecular weight
  • Lower cost compared to solid state post
    condensation process
  • Improved mechanical properties
    (Tensile strength, elongation, impact strength)
  • Most efficient melt processing stabilizer
    lower volatility compared to organic phosphites
    highest heat stability compared to organic phosphites
  • Protection against discoloration and degradation
    during processing (melt state)
    during service life
BRUGGOLEN® L11 Mixture of heat stabilizers and optical brightener
  • Long term heat stability up to 180° C
    maintains mechanical properties
    maintains toughness
  • Protection against aggressive chemicals (glycols, hot oils ...)
    (light colors)


Mixture of cuprous and potassium halides
  • Long term heat stability up to 180°C
    maintains mechanical properties
    maintains toughness
  • Protection against aggressive chemicals (glycols, hot oils …)

BRUGGOLEN® L20 Mixture of antioxidants, UV-stabilizers and processing stabilizers
  • Long term UV-stabilization (and heat stabilization) in outdoor applications
  • Protection against discoloration
  • Processing stabilization
  • Low volatility during processing

With a world consumption expected to reach 3,000,000 tons in the next 5 years - just for polyamide 6 and 6.6 - recycling has become critical in many aspects, with growing markets for applications with stabilized recyclates.
Such impacted nylon applications include automotive, carpets, fishing nets and lines, etc...

PET is mostly used for consumer goods packaging applications.

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