These foams are thermally stable at consistent temperatures as low as 40ºC and high as 90ºC. They're intended to be vacuum compressed and create a solid, airtight seal upon compression. PROS

Since open-cell design prevents deflation over time, PORON foam is frequently used in products designed to resist frequent, repeated impact. Running shoes and prosthetic limb interiors are good candidates for PORON foam and other open-cell polyurethane cushions. At the very bottom you will find a thin sheet of foam that protects the internal battery from the other components and prevents it from short-circuiting or going up in flames. That’s a very unlikely scenario but I would advise against removing it. TR This highly heat-resistant type achieves overwhelmingly low compression set at a high temperature range (70ºC – 110ºC). Even at room termperature, it delivers more stable performance.

Hardness

PORON foam is a microcellular urethane with high compression set resistance and high energy absorption. This foam has an open-cell design, which allows for greater resiliency and longevity, even after multiple impacts. This is an effective waterproof sealant for aircraft and automotive parts. As with the other AquaPro products, it is useful when you want to protect electric components from water. 6. PORON 4701-50 POLYURETHANE Each type of PORON polyurethane has its advantages, so which type of PORON foam will you need? PORON foam suppliers recommend a range of products based on your project. As a polymer with a closed-cell structure, it will not revert to an expanded state after it has been vacuum-sealed. It cannot be reused for other applications. RECOMMENDED USE

These PORON foams withstand fluctuating temperatures from -40ºC to 121ºC. They have a high compression set deflection rating and are denser than other PORON foams. The 4701-50 polyurethane products range in density from 240 kg/m³ to 480 kg/m³. PROS MS,MH This version of MS/MH is formed by casting LO/FR Series MS/MH onto a PET film This is the PET Support Series’s high flame-retardant material. A PR-type with removable PET film is also available. (MS-40PR) As we go through these types of PORON foam, you’ll learn what their purpose is and what factors you should consider before making any final product decisions. Rogers Poron Foam At CB Frost, typical applications for poron include dust, water and non-fogging seals for lighting fixtures, and door panel seals for a range of vehicles, as well as cushioning for an extensive range of electronic and communications devices. Why choose CB Frost for PORON® Urethane Foam Conversion Low compression set– PORON cellular urethane has superior resistance to taking a compression set as compared to neoprene sponge or polyethylene foam. Less than 2% at 73°F and less than 10% at 158°F makes PORON an ideal gasketing material for many indoor enclosure applications where dust, light and incidental splash sealing are required.Choosing a foam tape to put on your skin warrants an entirely different set of standards than choosing tape to seal an EV battery. The most common use of 4701-43 is as a battery pad inside electric vehicles and hybrids. This foam could be used for filling gaps, gasketing, and sealing. It can also be manipulated into a different type of cushion. Customization needs can vary, and no two people want identical things out of their designs and materials. Curious about how to meet your custom industrial materials needs? You can read more about foam tape and other adhesive materials in our Learning Center.

PORON 4701-50 isn’t soft or resistant to all chemical fluids. Exposure to some chemical fluids may cause this polyurethane to swell. RECOMMENDED USE Compression lets the polyurethane springs condense, and air moves freely from the space. Meanwhile, the remaining air can support the pressure point within the micro-coils. In addition to low compression set, important characteristics that make poron a versatile material for a vast number of applications are: In the same vein, this foam safely seals high-pressure gaskets, even in extreme heat. It’s also valuable for car interiors, airplane seating, and running shoes. 5. PORON AQUAPRO™ CLOSED-CELL VACUUM SEAL 4701-41

Consistent microcellular structure– Fine and consistent open cells make PORON microcellular urethane an ideal dust gasket material, suitable for many cleanroom applications. HH is a harder product, primarily being used for the foot pads of audio devices, home electric appliances and office appliances. The C type that has excellent gripping property is also available.

We do not recommend using 4170-60 to fill small gaps. Its firmness might prevent it from expanding precisely into the necessary shape in a small space. RECOMMENDED USE PORON foam is meant to keep its shape, cushioning, and contouring precisely in response to pressure. These viscoelastic properties are derived from the foam’s microcellular design. The AquaPro™ series is only intermittently stable in high-heat (120ºC) conditions. For high-heat applications, you may want to select a different PORON foam. PORON has a unique naming convention for identifying each specific grade. Below is an explanation of the Rogers PORON naming convention and how to callout PORON microcellular urethane foam on a drawing. Available in different grades – including PORON® 4701-40 soft foam, PORON® 4701-50 firm foam for managing high energy impact and PORON® 4701-60 firm foam for energy management solutions including enclosure gaskets

When Would PORON NOT Be Recommended?

PORON Market Prefix – the family of products, for industrial grades the market prefix is usually 4701 or 4790. As the lowest-density foam, you can use it as a seal on lightweight products, or within small gaps, without throwing off the item's weight. CONS This series does not require a significant compression force to get a tight seal. In addition, it’s flame-retardant and resists many automotive chemicals. CONS