Elastomers, clear resins, and synthetic rubbers from Asahi Kasei

Elastomers, Clear Resins, and Synthetic Rubbers

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Tech guide Asaflex
Target characteristic Basic technical data Keys to attainment with Asahi Kasei elastomer or Asaflex™ as modifier
Impact strength Impact strength of extruded sheets from Asaflex™ blends

Low-temp. impact strength of sheets from Asaflex™/SC blends
Virtually every modifier imparts increased impact strength; optimum selection depends on desired degree of increase, and on target product stiffness, transparency, moldability, and other properties.

Modifier quantity requirement varies with grade.

Two or more modifiers in combination may further heighten performance and quality.
Folding endurance
Hinge properties
Folding properties of extruded Asaflex™/GPPS blends

Asaflex™ hinge properties
Blend in Asaflex™ or Tufprene™ to obtain folding endurance with GPPS and other polymers ordinarily susceptible to fracture under folding.

Utilize superior hinge properties of Asaflex™ for transparent cases, components, parts.
Tensile strength
Elongation
Tensile strength and elongation - typical
intrinsic test values


Elongation of extruded sheets from Asaflex™/GPPS blends
Modifier's tensile strength and strain test values are influenced by the structure of its companion polymers in the product; use modifier’s intrinsic test value as basic predictor of performance enhancement in target product.

Blend in Asaflex™ or Tufprene™ to obtain elongation with GPPS and other polymers ordinarily lacking elongation.
Flowability
Processing conditions
Intrinsic melt flow rate
- typical ranges


Asaflex™ process conditions sampler
The flowability of the modifier is largely dependent on its MW, MW distribution, styrene content, and polybutadiene-segment hydrogenation, and on the phase-separation morphology which is characteristic of the target product melt and the molding temperature.

Asaflex™ is often used in neat form and is amenable to injection, T-die extrusion, blow, and other fabricating processes. Appropriate temperatures vary with the process, as shown in the Asaflex™ process conditions sampler, and care is necessary to avoid gelation.
Polystyrenes (PS)
Polyolefins (PO)
Impact strength
- baseline comparison
Modifiers available with compatibilities specifically appropriate for PS- and for PO- based formulations, and also for PS/PO compatibilization.

Modifier selection based on morphology (modifier dispersion) in the PS or PO blend.
Transparency Transparency of Asaflex™/PS and PP/Tuftec™ blends

Transparency of extruded sheets from Asaflex™ blends

Refractive index of Asaflex™ and other clear polymers

Specific gravity of Asaflex™/clear polymer blends
Asaflex™ blends and PP/Tuftec™ blends provide outstanding transparency together with specific combinations of softness or hardness and other product characteristics.

Transparency of Asaflex™/PS blends varies with the Asaflex™ content and the Asaflex™ grade. Select the optimum grade for desired results.

To obtain transparent blends of Asaflex™ and other clear polymers, select component polymers with very closely matching refractive indices.

Asaflex™ is lower in density than other clear polymers, and thus facilitates weight reduction.
  • Please note that all data and values are given as typical results obtained with the indicated test methods,
    and not as any product specification or warranty of any nature.