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High melt flow index for excellent processability in extrusion and injection molding.
Outstanding abrasion resistance and mechanical toughness across a wide temperature range.
Good hydrolytic stability, enabling reliable performance in humid or wet environments.
Excellent clarity and low yellowness for transparent or color-sensitive applications.
Compatible with common plasticizers and additives for formulation flexibility.
Medical tubing and fluid delivery systems requiring biocompatibility and kink resistance.
Automotive interior trim components including soft-touch overlays and seals.
Consumer electronics protective cases and wearable device housings.
Industrial hoses and pneumatic tubing demanding flexibility and pressure retention.
Footwear midsoles and outsoles requiring rebound resilience and weather durability.
| Chemical Type | Aliphatic polyester-based thermoplastic polyurethane (TPU) |
| Product Form | Pellets |
| Appearance | Translucent, off-white to light amber pellets |
| Primary Applications | Extruded tubing, injection-molded parts, thin-gauge films |
| Key Features | High clarity, low extractables, hydrolysis-resistant |
| Benefits | Reduced processing energy, enhanced part aesthetics, long-term dimensional stability |
| Processing Method | Extrusion, injection molding, blow molding |
| Regulatory Status | Meets ISO 10993-5 cytotoxicity requirements (tested); FDA-compliant for indirect food contact (per 21 CFR §177.1680) |
Q1: What is the primary function of Lubrizol ALR E95A in TPU formulations?
A: ALR E95A is a specialized additive designed to enhance melt processability and surface finish of thermoplastic polyurethane (TPU) compounds, particularly during extrusion and injection molding. It helps reduce melt viscosity without significantly compromising mechanical performance or thermal stability.
Q2: Is ALR E95A compatible with all common TPU chemistries (e.g., polyester-, polyether-, and polycaprolactone-based)?
A: Yes, ALR E95A demonstrates broad compatibility across major TPU families. Performance optimization may vary depending on base polymer polarity and molecular weight, so formulation-specific evaluation is recommended for critical applications.
Q3: How should ALR E95A be incorporated into TPU processing?
A: It is typically added directly to the TPU resin via dry blending or gravimetric feeding prior to extrusion or injection molding. Pre-compounding is not required, and it disperses effectively under standard processing shear conditions.
Q4: Does ALR E95A affect the final product’s regulatory compliance for food-contact or medical applications?
A: ALR E95A is not pre-approved for regulated end uses. Its suitability for food-contact or medical devices depends on full system evaluation—including base polymer, processing conditions, and final application requirements—and must be validated by the compounder or end-user against applicable regional regulations.
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