An Incredibly Versatile Cushioning Material

PORON 4701-50 is a highly engineered, closed-cell polyurethane foam that offers excellent cushioning and shock absorption properties. With a density of 0.50 lbs/ft³, 4701-50 provides protection against high impact forces while still being compressible and comfortable. Some key features of this versatile material include:

Exceptional Cushioning Ability

With an impressive load deflection of 25 psi, 4701-50 can comfortably absorb impact and compressive forces without bottoming out. This makes it ideal for cushioning applications where high performance shock attenuation is required. The cells have a smooth surface and round structure, allowing them to compress gradually rather than collapsing suddenly on impact.

Excellent Resilience and Support

4701-50 rebounds quickly to its original thickness after compression. This elasticity means it continuously provides cushioning support, outperforming many other cushioning foams. The material’s resilience also enables excellent stability and support in orthotics and prosthetics.

Consistent Cell Structure

The proprietary manufacturing process creates an open-celled structure with uniform cell dimensions throughout the foam. This consistency ensures the same cushioning capacity across the entirety of the material. There are no weak spots or irregularities.

Works Across a Wide Temperature Range

Unlike many foam cushions, 4701-50 performs well through a temperature range of -40°F to 180°F. The cushioning properties remain stable regardless of climate or weather conditions. This versatility makes it suitable for diverse environments.

Easy to Fabricate and Shape

With a tensile strength of 10 psi and tear strength of 14 pli, 4701-50 can be readily thermoformed or die cut into complex shapes without loss of cushioning function. This facilitates simple integration into protective gear, prosthetics, orthotics, and more.

Long Service Life

The foam is highly resistant to many chemicals and petroleum products. It also retains its cushioning capacity well through repeated impact cycles. With proper care, components made from 4701-50 can remain in service for many years.

PORON 4701-50 delivers an exceptional balance of cushioning, stability, and rebound resilience. Let’s look at a few examples of how its versatile properties are put to use:

Key Applications

Protective Gear

• Helmet liners and pads
• Knee, elbow, and shoulder pads
• Shinguards and gaiters

Footwear

• Midsoles and insoles
• Heel cushions
• Metatarsal pads

Seating

• Wheelchair cushions
• Saddle pads
• Office chair cushions

Mattresses and Pillows

• Mattress toppers
• Pillows and cushions
• Pet beds

Healthcare

• Prosthetic liners and sockets
• Orthotic insoles and pads
• Medical seat cushions

Additional Uses

• Handlebar grips
• Electronics padding
• Packaging protection

PORON 4701-50 delivers excellent shock absorption and cushioning for many demanding applications across a variety of markets. Its capacity for high performance, easy fabrication, and long service life make it a go-to solution for manufacturers. With proper design and integration, it can enhance comfort, reduce fatigue, and prevent injury in the products people use daily.

Frequently Asked Questions

What thickness is recommended for typical applications?

The typical thickness range is 1/8″ to 1/2″, but it depends on the specific application and expected impact forces. Thicker foam may be needed for greater energy absorption.

Does PORON 4701-50 come in sheets or blocks?

It is available as molded sheets, slabs, and blocks. Custom thicknesses, lengths and widths can be specified based on your application requirements.

Can 4701-50 be combined with other materials?

Yes, PORON foams are often laminated with fabrics, films and other materials to create composite cushioning structures. Adhesives compatible with polyurethane should be used.

Is 4701-50 breathable?

No, the closed-cell structure of this foam inhibits air circulation, so it may not be suitable for applications requiring breathability. Other PORON grades with open-cells can offer air permeability.

Is 4701-50 foam environmentally friendly?

PORON foams are free of toxic heavy metals and do not off-gas VOCs. They are also fully recyclable at end of life. PORON’s manufacturing process strives for sustainability.