Features Of Dow AFFINITY™ GA 1950 Impact Modifier
High clarity and low haze, with low density (0.874 g/cm³) and low viscosity, suitable for thin-wall products and high-speed processing
Excellent thermal stability and low-temperature performance, maintaining stable mechanical properties across a wide temperature range
High flexibility and low crystallinity, enabling high-fill modification to reduce formulation costs
Non-corrosive, low-odor, and excellent color, free of antiblock, slip, and processing aids for a pure formulation
Excellent compatibility with a wide range of polymers, enhancing adhesion to diverse substrates when compounded
Typical Applications Of Dow AFFINITY™ GA 1950 Impact Modifier
Polymer modification: As a modifier for PP/PE, improving flow, impact resistance, and low-temperature toughness for appliance housings and automotive parts
Masterbatch & additive carrier: Carries pigments and functional additives to enhance dispersion and processing stability
Hot melt adhesives: Offers excellent bond strength for carton sealing and hygiene products over a wide temperature range
Composite packaging: Used as an adhesive or heat-seal layer in multi-layer films, improving interlayer adhesion and optical performance
High-fill products: Compatible with high levels of fillers for low-cost, high-rigidity industrial components
Specifications Of Dow AFFINITY™ GA 1950 Impact Modifier
| Property | Nominal Value (Unit) |
|---|
| Physical |
|
| Density | 0.874 g/cm³ |
| Gardner Color | 2.00 |
| Volatile Matter | <0.15 % |
| Mechanical |
|
| Tensile Strength (Break) | 1.76 MPa |
| Tensile Elongation (Break) | 190 % |
| Thermal |
|
| Glass Transition Temperature | -57.5 °C |
| Melting Temperature (DSC) | 68.5 °C |
| Fill Analysis |
|
| Brookfield Viscosity (177°C) | 9.50 Pa·s |
| Additional |
|
| Melt Flow Rate (190°C/2.16 kg) | 4.0 g/10 min |
| Haze | <4.5 % |
Dow AFFINITY™ GA 1950 Impact Modifier – Frequently Asked Questions (FAQ)
Q1: What is the primary function of AFFINITY™ GA 1950 in polymer formulations?
A: AFFINITY™ GA 1950 is an ethylene-octene copolymer designed to enhance impact resistance—particularly at low temperatures—while maintaining clarity and processability in polyolefin-based compounds, including PP and HDPE blends.
Q2: How does AFFINITY™ GA 1950 differ from traditional EPDM or EPR impact modifiers?
A: Unlike conventional elastomeric modifiers, GA 1950 offers superior compatibility with polypropylene due to its narrow molecular weight distribution and controlled comonomer incorporation, resulting in finer dispersion, improved melt flow, and reduced risk of phase separation during processing.
Q3: Is AFFINITY™ GA 1950 suitable for food-contact applications?
A: AFFINITY™ GA 1950 is manufactured to meet general requirements for food-contact polymers under FDA 21 CFR §177.1520 for olefin polymers, and is widely used in food packaging formulations where regulatory compliance is verified through full system assessment by the compounder.
Q4: What processing methods are recommended for incorporating GA 1950 into thermoplastic systems?
A: The modifier is compatible with standard compounding equipment—including twin-screw extruders—and performs well under typical PP or HDPE processing conditions. It exhibits good thermal stability and can be incorporated via dry blending or masterbatch dilution without requiring special handling precautions.
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