Closed cell epdm foam

Closed Cell Sponge Rubber

The technically correct term for closed cell sponge rubber is expanded rubber. The cells are like individual balloons, holding gas and not allowing moisture to pass through as long as the cell wall has not burst. The raw compound is mixed on the same type of equipment used to mix solid rubber compounds, but a chemical blowing agent is also added.

Under the heat and pressure of a pre-cure or pre-forming process, this additive decomposes and mixes with the rubber compound and generates nitrogen gas. The bun of closed cell sponge rubber is then aged and split into sheets typically from.

Constant deflection of closed cell sponge rubber may cause the gas to permeate through the cell walls. When a closed cell sponge gasket has been over compressed, the gasket may rebound very slowly, or not at all, compromising the integrity of the gasket. Premium closed cell neoprene sponge products will resist light oil contact, ozone, alkalis and acids, making them a good choice for general enclosure door gaskets.

If a commercial closed cell neoprene sponge gasket is requested, this would likely be supplied. Closed cell EPDM sponge materials will not meet the UL flame rating without additives and they will not withstand oils or fuels.

However, they will stand up to outdoor conditions such as water, ozone and indirect sunlight better than neoprene. ECH also has very good resistance to weather, ozone, sunlight and oxidation. They tend to have slightly lower density than most closed cell sponge products, and the water absorption properties are slightly higher than closed cell neoprenes.

Many different applications over a wide breadth of industries had utilized these… read more. Closed Cell Sponge Rubber The technically correct term for closed cell sponge rubber is expanded rubber.Save my name, email, and website in this browser for the next time I comment. Open Cell Foam Vs. Home Open Cell Foam Vs. For you easily, all foam materials can be either open cell foam or closed cell foam. It might be complicated for you to learn what exactly they are in a short time. But after going through this post, you will easily find out what are open cell foam and what are closed cell foam.

Another bonus is you can get to know the comparison between the 2 different types of foam material, and can choose wisely for your applications. Foam materials are versatile, lightweight and durable, which makes them ideal for usage across many industries.

Here we are going to elaborate open cell foam materials from some aspects in detail. Polyurethane foam is one of the most frequently-used open cell foams. They are widely used in insulation, sound and shock absorption application across a range of industries and materials, including furniture upholster, seat cushion, medical packaging, electronics, power equipment and so much more.

Open cell Polyurethane foams are superior to other forms of insulation for their dexterity and resistance to oxygen. You might be puzzled to hear that something solid is also made of Polyurethane foam.

The fact is actually that Polyurethane foam comes in two forms- open cell or closed cell structure, both of which differ in densities and respective applications. However, in this post, we focus on open cell Polyurethane foam materials. Besides Polyurethane foam can also be provided in open cell structure. Usually open cell foams are lightweight and less dense compared with closed cell foams, and they have a soft, cushioning and sponge-like appearance. During an open cell foams expansion and curing, the gas bubbles used in its production are released into the atmosphere as against being locked in place as with closed cell foams.

These holes within open cell foams enable them to interlock and interconnect. Due to this porous nature, open cell foams can not resist liquid water or water vapor. These internal cells of closed cell foam sit closely together but are not connected.Our EPDM sponge rubber is a high-quality, closed cell material that is commonly used to create an air and watertight seal.

EPDM sponge is great for use in outdoor sealing applications due to the superior UV and Ozone resistance the material offers. Aside from offering excellent weathering resistance, EPDM also features good flexibility, tensile strength and recovery properties. The closed cell structure enables the material to handle high-pressure sealing applications at a better rate. This serves to increase the life expectancy of the material in physically demanding applications.

We can supply our EPDM sponge rubber material in a wide variety of grades, densities and thicknesses as standard.

closed cell epdm foam

This ensures that you can always get the perfect material to suit your unique requirements. We can also produce the material in a range formats such as; full rolls, sheets, strip cut lengths and bespoke gaskets.

A key feature of our closed cell EPDM sponge rubber is the materials air and watertight structure. This provides excellent thermal sealing as well as preventing the build-up of bacteria and mould. The closed cell structure also enables our material to create a seal using minimal rates of compression. However, the sealing properties of the material can vary depending on the density. Product Description Our EPDM sponge rubber is a high-quality, closed cell material that is commonly used to create an air and watertight seal.

Technical Data. Product Range. Buy Online. An error has occurred, please try again later. Contact Form Product Catalogue Request a quotation.Even though they look the same and are often confused, sugar and salt are very different. Like sugar and salt, not all black synthetic rubber is the same. This difference holds true when black synthetic rubber is used as a closed cell flexible elastomeric foam insulation.

Aerocel insulation is made of EPDM - a synthetic rubber that offers superior weather and water resistance, making Aerocel Different and Better. These are some of the greatest differences that could matter to a designer, installer or owner of a system that relies on performance.

closed cell epdm foam

Thermal Conductivity - no greater than. ASTM C requires water absorption of no greater than 0. One product data sheet has dropped the decimal place, which is not acceptable since this decimal place is significant to indicate that the material performance is equal to or better than the established standard.

Hot surface performance is critical. One product states no cracking or delamination. These products may or may NOT provide the moisture resistance, dimensional stability, or corrosion testing required to meet the requirements of ASTM C The data is not presented.

Both standards require material in duct, plenums, and other air handling space to have been tested by ASTM E 84 or ULand be rated at flame spread of 25 or less and smoke developed of 50 or less.

One may have the fire safety characteristics, but not the service temperature, or vice-versa. The products in this comparison do NOT meet the temperature requirements in many thicknesses common to codes and standards. This is the reason that rubber products that have to last in the weather, like roofing, is made from EPDM. Aerocel is tested for stability outdoors using direct exposure testing with no coatings, claddings, or jackets.

EPDM rubber is used for moisture sealing and waterproofing because of its exceptional resistance to water and water vapor ingress. This resistance is enhanced by the nonpolar atomic structure of EPDM. The water vapor transmission properties are the best in the industry for flexible elastomeric rubber insulation, and the water absorption properties are the best, at.

One product data sheet has dropped the decimal place, which is not acceptable. Is this to leave the impression of meeting or exceeding this performance requirement? EPDM is a naturally mold-and-mildew resistant material.

This resistance results from tight cross-linking that creates a dense polymer, not allowing microbes to gain an attachment.

closed cell epdm foam

EPDM contains no food source for microbial growth to sustain itself.Neoprene Foam — A soft, flexible, and highly durable sponge rubber, neoprene foam offers excellent thermal and moisture insulation, and is resistant to Ozone, sunlight, and oxidation, as well as many chemicals and petroleum derivatives.

Neoprene has a unique molecular structure that renders it resistant to breakdown by water and air. As such, it is commonly used in athletic equipment like gloves, wetsuits, and knee pads. Its strength lends it to packaging applications for items that will travel long distances or may not be handled with care during transport.

Polyethylene foam is shatterproof, non-dusting, flexible, impervious to mold, mildew, rot, and bacteria, and is available in various densities to match the demands of different applications. Other examples of closed-cell foam rubber include gym rubber, which makes excellent activity flooring, and cross-linked polyethylene, a carvable material popular in outdoor and marine applications. Request Technical Information.

ASTM specifies physical performance, notpolymers nor polymer content. If a particular polymer or polymer content is required, please contact John Sr. Therefore, customer sample evaluation and approval of any substitution is suggested. For technical evaluation and support, please contact John M. Bonforte, Sr. Have a Technical Question? Ethylene-vinyl acetate EVA is the copolymer of ethylene and vinyl acetate. Underwriters Laboratories has a set of industry standards that it uses to test electronic components, including gaskets.

Gasket Material - Open Cell Foam vs. Closed Cell Sponge

With the above in mind, it is important not to confuse Shelf Life with Service Life. Team Monmouth's commitment is to bring ongoing value to our customers.

We constantly strive to improve products and services that meet your needs and exceed your expectations. Please select one of our team members below to discuss how we can help you! Neoprene was originally used as an oil resistant replacement for natural rubber. Neoprene explained, what is it? Broadly speaking, there are three different types of EVA copolymer. EVA explained, what is it? Shelf life of rubber is a simple question with a complex answer.

By John Bonforte, Sr. You can find out more about which cookies we are using or switch them off in settings. This website uses cookies so that we can provide you with the best user experience possible.The industrial needs of our 21st century world are far more advanced and varied than they have ever been before. Many industries need special types of products for their specific applications. Foam sponge rubber is one such special product. Though classed as a form of cellular rubber, foam sponge rubber has a feel which is completely unlike most traditional forms of rubber material.

It also offers a unique range of qualities which set it apart from other materials, most notably its high level of compressibility. As an alternative to more commonplace solid rubbers, sponge rubber products are used when better rates of compression and flexibility are needed.

Also known as cellular rubber, it comes in open cell and closed cell variations. Foam sponge rubber was discovered by accident in by the German chemist Otto Bayer. The type of sponge rubber developed was in the form of neoprene. Today, however, foam rubber sheets can come as neoprene, nitrile, EPDM, or even a blend of different rubber compounds.

Rubber-Cal recognizes that sponge rubber is crucial for a large variety of applications, so we aim to make inventory the right kind of cellular foam rubber for your needs. Closed Cell PE White is a non-marking compressible sheet ideal for a variety of padding applications.

EPDM Foam Rubber

Open cell rubber sheets made from EPDM are ideal for any gasket or padding applications for the outdoors. The most important thing to realize is that foam sponge rubber is inherently different from its solid rubber counterpart. This difference is readily apparent in the cellular structures of both open cell rubber and closed cell rubber. This means that the material is perforated with air pockets throughout its body. Foam rubber is generally softer than regular solid rubber.

In contrast, solid rubber has a molecular structure that is very closely packed together, which makes it a generally thicker and sturdier elastomer. Solid rubber tends to have a low compression rate. Foam sponge rubber, on the other hand, has a superior compression rate over solid rubber.

Compression is the ability of an elastomer to revert back to its original shape after being manipulated by physical objects and pressure.

As a result, cellular rubber can be great for use as seals and gaskets. However, there are a few key differences between the open cell rubber and closed cell rubber versions of foam sponge rubber.Established Home Data Sheets About Contact.

Toggle navigation. EPDM is the acronym for ethylene propylene diene monomer rubber.

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This synthetic rubber is sometimes blended with other materials and is often used in areas requiring higher performance physical properties with respect to heat, ozone, and weather resistance. EPDM sponge rubber foams, in either closed cell OR semi-closed cell form, have become more widely used in the automotive industry in an effort to meet worldwide material standards in new and existing applications.

Our EPDM foams are used for windshield seals, automotive shields that provide both moisture barrier properties and acoustic benefits, NVH functions, seals, gaskets, and a wide range of other unique applications. Fostek has developed a proprietary technology for our diverse family of EPDM sponge rubber foams in the super-soft and ultra-soft as well as closed-cell categories.

These foams deliver outstanding physical properties, mechanical performance, wider functional temperature ranges, and compatibility with wide varieties of pressure sensitive adhesives. Acrylic, rubber, butyl tape and other pressure sensitive adhesives PSA can be applied to some of these products to meet customer specifications for the high adhesion performance.

Our EPDM foam offerings include semi-closed cell super soft and ultra soft foams; closed cell foam, and custom foam blended products. We are happy to answer any questions you may have, or discuss the specifications for your application. Contact our sales office by phone at or click here to contact us. Congratulations to Brad Grohs! Fostek Named Large Business of the Year The Large Business of the Year award is given to a company of 51 or greater employees that has made a significant contribution to the growth of Bedford.

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