Polymer Modification Improves Toughness, Uniformity, and Processability
DuPont™ Surlyn® for polymer modification is used as a processing aid and compatibilizer in PET and has a unique use as a toughener in automotive parts.
When used for polymer modification, DuPont™ Surlyn® improves toughness and adds high gloss to automotive parts, increases uniformity in incompatible PET blends, and improves PET injection and extrusion blow molding processes.
Toughening Resin for Nylon
Surlyn® is a toughening resin for polyamides (nylon 6 and nylon 66). It becomes finely dispersed (<0.3µm particle size) in nylon, enabling single screw extruders to make toughened alloys.
For example, Surlyn® is used to increase toughness in automotive parts made from nylon.
Surlyn® as nylon toughener provides:
- Excellent toughening at room temperature
- Higher modifier loadings which increase toughness
Grades are available at different toughening strengths:
- General purpose: Surlyn® 9520 and 9521
- Intermediate: Surlyn® 9020
- Super-Tough: Surlyn® 9320 and 9020 at higher loadings
Compatibilizer Resin in PET
Surlyn® 8920 as a Compatibilizer
Surlyn® can be used as a compatibilizer resin. Adding Surlyn® to incompatible PET polymer systems increases blending uniformity and enhances mechanical properties such as elongation, impact strength, and flexural (or bending) modulus. Resins that can be compatibilized with PET by using Surlyn® include LDPE, LLDPE, HDPE and other polyolefins. Adding Surlyn® with Elvaloy® AC into CPET improves low temperature impact resistance in CPET trays.
Processing Aids for PET
Surlyn® 8920 as a Nucleant
Adding Surlyn® 8920 as a nucleating agent can reduce PET crystallization temperature in the injection molding process, which can speed up solidification of the PET melt, improve parts ejection, and shorten the molding cycle time for CPET and APET food trays.
Surlyn® 8920 as a Rheology Modifier
Surlyn® 8920 can also be used as a rheology modifier to improve PET compounding and downstream fabricating processability for injection molding, blow molding, and extrusion. Surlyn® can also alter melt viscosity and melt strength, resulting in improved product appearance, product performance, and processing productivity.
With the ability to deliver high performance for a variety of uses, Surlyn® is an excellent resin for polymer modification.
DUPONT PRODUCTS & SERVICES
DuPont™ Surlyn® sealant resin provides excellent clarity, hot tack, heat seal, and toughness for packaging a variety of foods, as well as pharmaceuticals, household cleaners, and personal care products.
DuPont™ Elvaloy® for polymer modification is used to improve toughness in CPET and APET trays for frozen and refrigerated ready-to-eat meals, as a PVC plasticizer and as a compatibilizer in PET/HDPE recycling.
DuPont™ Nucrel® resin acts as a foil adhesive and heat sealant for beverage packaging, condiment and spice oil sachets, as well as non-food products including toothpaste tubes and cable shielding.
DuPont™ Nucrel® AE for LDPE extrusion coating improves foil adhesion when used as an LDPE modifier in pouches and sachets for food oils, snacks, and non-food products.
DuPont™ Surlyn® for thermoforming film provides excellent clarity and formability, making it a cost-effective solution for sterilized medical device packaging.
Surlyn® Reflections high gloss resin is a thermoplastic alloy made up of ionomer and polyamide, enabling manufacturers to mold tough and durable, high-gloss parts that require no painting.
Coldpack’s Airliner thermally insulated pouch is a foam packaging alternative for shipping temperature-sensitive products, made with three DuPont resins.
European packaging converter WipakGryspeert uses DuPont™ Bynel® in foam trays for a more efficient, flexible, and fresher packaging solution for meat, seafood and ready-to-eat meals.
DuPont offers several polymer impact modifier technologies that can be used for toughened nylon, increasing low-temp. impact properties with good adhesion to nylon.
INFORMATION & IDEAS
DuPont innovations help manufacturers and designers create cost-effective, environmentally friendly packaging solutions.
DuPont works with converters and brand owners to develop energy saving packaging solutions, from making production and shipping more efficient to reducing power costs.
Adding a polymer compatibilizer between two polymer layers results in finer dispersion, as well as more regular and stable morphologies.
DuPont™ Surlyn® delivers the strength, stiffness, and extrudability film converters require for packaging downgauging and to optimize use of petroleum-based materials.