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Low-hardness, high-resilience thermoplastic elastomer with excellent compression set resistance.
Good processability via injection molding and extrusion without requiring drying or pre-treatment.
Enhanced skin-friendly tactile feel and low extractables, suitable for consumer-facing components.
Compatible with polypropylene (PP) and polyethylene (PE) substrates for co-molding applications.
RoHS-compliant and free of phthalates, heavy metals, and halogenated flame retardants.
Soft-touch overmolding for power tool grips and handheld appliance housings.
Sealing gaskets and vibration-damping pads in automotive interior modules.
Flexible hinges and snap-fit components in medical device enclosures.
Ergonomic grips for sporting goods and personal care devices.
Non-slip surfaces for industrial control panels and safety-critical equipment interfaces.
| Chemical Type | Styrenic Block Copolymer (SBC)-based TPE |
| Product Form | Pellets |
| Appearance | Off-white to light beige, free-flowing granules |
| Hardness (Shore A) | 75 ± 3 |
| Density (g/cm³) | 0.98–1.02 |
| Melt Flow Rate (230°C/2.16 kg, g/10 min) | 12–18 |
| Primary Applications | Overmolding, soft-touch components, sealing elements |
| Key Features | Low hardness, high resilience, PP/PE adhesion, non-toxic formulation |
Q1: What is the primary functional role of API 1685/PS LHR TPE in polymer formulations?
A: API 1685/PS LHR TPE functions as a high-efficiency, low-haze processing aid and surface modifier for thermoplastic elastomers and styrenic systems, enhancing melt flow, reducing die buildup, and improving surface gloss and release characteristics without compromising mechanical integrity.
Q2: Is API 1685/PS LHR TPE compatible with common thermoplastic elastomer matrices such as TPE-S, TPE-V, and TPE-E?
A: Yes — it demonstrates broad compatibility across styrenic (TPE-S), vulcanized (TPE-V), and ester-based (TPE-E) elastomer systems. Compatibility is typically confirmed through standard melt blending trials and rheological evaluation under typical processing conditions.
Q3: How does API 1685/PS LHR TPE differ from conventional silicone-based or wax-type processing aids?
A: Unlike traditional waxes or silicones, API 1685/PS LHR TPE offers superior thermal stability during extrusion and injection molding, reduced volatility, and improved dispersion uniformity — resulting in more consistent surface effects and lower risk of bloom or plate-out at elevated processing temperatures.
Q4: What are the recommended handling and storage conditions to maintain product performance?
A: Store in original sealed containers at temperatures between 10 °C and 30 °C, away from direct sunlight and sources of heat or moisture. Avoid prolonged exposure to ambient humidity prior to use, as hygroscopic sensitivity may affect dispersion efficiency in sensitive formulations.
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