ARPRO - Standard

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ARPRO Standard Grades

ARPRO® EPP Standard Grades comprise the leading market share of expanded polypropylene supplied as a raw material to molders throughout North America. These JSP customers recognize the consistent high quality and unsurpassed customer service and logistics support that JSP provides.

ARPRO® is shipped in special trucks equipped to handle high volume air conveyance, or in reusable bulk containers.

Product is available in a range of densities suitable for the vast majority of industrial applications, in a choice of black (charcoal grey) or white beads. See here for Colors.

ARPRO® is highly consistent batch to batch due to JSP's stringent quality control systems. For molders, this means faster set-up, trouble-free molding operation, less waste, and consistent high quality in finished molded parts.

Basic ARPRO® Material Properties

Lightweight
Outstanding energy absorption
Very high strength to weight ratio
Withstands multiple impacts without significant damage
Excellent thermal insulation
Resilient, good shape "memory"
Highly durable
Resistant to water, most oils and chemicals
Chemically inert
Does not support microbial growth
Acoustical insulation for certain applications
Highly buoyant
Recyclable
Load bearing structural support in some applications
Resist temperature extremes from -35°C (-31°F) up to 130°C (265°F)
Can be engineered for many technically demanding applications

Density Ranges

There are formulations of ARPRO® that are resistant to UV exposure, extreme physical abuse, abrasion, and other environmental stresses.

Standard ARPRO® Grades are available in a range of densities. The densities referred to here are bead densities, which when molded result in end products of slightly higher density than the beads used to make them.

Low Density ARPRO® EPP refers to a range of bead foam from 16 grams per liter (g/l) to 45 g/l.
Medium Density covers a range from 45 g/l to 90 g/l.
High Density covers a range from 90 g/l up to 280 g/l.

Air-Classified High Density

When EPP beads are manufactured at high densities, greater than 90 g/l, the physical process results in individual beads that may vary up to 20% in weight, from bead to bead.

To reduce this range of density variation, JSP uses a special air classification production step where beads are sorted by air pressure. Higher density beads fall faster and can thus be screened out to produce a much more consistent and narrower bead density range.

The result is greater control over the final molded part density when such performance is critical. This is typically required for crash protection components in automotive systems.