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Toughness, Durability, and Elasticity


Rubber is a material that has been around for hundreds of years. Mesoamerican people first mixed rubber sap with juice from a morning glory vine in order to make the material more durable and elastic. Charles Goodyear has been credited with the modern form of rubber and is also known for inventing the process known as vulcanization. Vulcanization is a chemical process in which sulfur is added to natural rubber or similar polymers to make the materials more durable. Today, the majority of rubber is a synthetic product made from crude oil. In this newsletter, we will cover the some of the different rubber materials we have available as well as typical applications they can be used for.

Masticated rubber is one of our most cost effective rubber choices. It is made up of recycled tire content, 49% tire-derived from post consumers, and 41% from post industrial tire plant scrap. It is reinforced with fiber and fully cured. This translates into high tensile strength, tear strength, resilience, wear characteristics, ozone resistance, low temperature resistance and durability. Since masticated rubber is made up of recycled materials, it costs less while also reducing weight as compared to other rubbers. The durability of the rubber also helps keep costs low as the consumer will not have to replace the part often. Typical applications include: baffles, splash shields, mud flaps, and floor mats. The standard masticated rubber has a smoother finish, but we also have a ribbed finish available. The ribbed finish allows the mats to be cleaned easily and more slip resistant. It is able to withstand temperatures up to 400°F. It is excellent for areas where there is high traffic and applications that require no tearing, curling or creeping of the mats. Our masticated rubber is also available in a super tough version. Super tough is a composite material consisting of a polyester and nylon fabric laminated to either one or both sides of a masticated rubber sheet. It offers superior stiffness, tensile strength and tear resistance. Its strength allows the reduction of part thickness which as a result, reduces the weight and cost of a part.

                                         

                                           (Standard Masticated Rubber and Ribbed Masticated)

While our masticated rubber is reinforced with fiber, we also offer other rubbers that can be inserted with a variety of cloths. The fabrics that can be inserted include: nylon, cotton, polyester, fiberglass, cotton, or a cotton/polyester blend. These rubbers can come with varying amounts of cloth ranging from one ply to four ply. The cloth reinforcement enhances the dimensional stability of the material as well as help reduce tearing through very high tensile strengths. Cloth inserted rubber is best used as an abrasion and impact resistant material for demanding applications where the stresses are generally static in nature.

                       

                                                                  (Cloth Inserted Rubber)   
Another type of rubber we have available is silicone. Silicone rubber sheets are able to provide the user with maximum reliability while being able to withstand extreme temperatures. They can remain viable from -80°F to 500°F. It can also handle extreme environments including being resistant to fungus, water, and some chemicals. It does have limited oil resistance.    

                           

                                                          (Rubber Silicone Gasket)
We also carry a variety of polymers in our sheet rubber goods. Whether it is neoprene, nitrile, SBR, EPDM, or a blend of rubber, each polymer has its own benefits. Neoprene is a good general purpose elastomer. It features moderate oil and ozone resistance as well as fungus resistance. It is also flame retardant, able to withstand temperatures ranging from -40°F to 220°F, has a good compression set, and has excellent bonding characteristics to metal. Nitrile, also known as NBR or Buna-N, is a petroleum-based fluid resistant elastomer. Nitrile has excellent fuel and oil resistance and is able to withstand temperatures ranging from -40°F to 220°F. While having poor ozone resistance, it does have a great compression set and gas permeation resistance. SBR is a synthetic elastomer that was originally developed to replace natural rubber in tires. It has excellent abrasion resistance, but poor fuel and oil resistance which allow the material to stay a lower cost.  It has a temperature range of -60°F to 220°F. EPDM is a weather resistant elastomer. And while it is one of the most costly polymers, it has excellent low temperature, heat, water, coolant, steam, ozone, and UV resistance. It also resists mild acids, liquid fertilizer and brake fluids. It is generally considered to be non-staining. It can withstand temperatures from -60°F up to 300°F depending on the grade and virtually no resistance to oil and fuels. Sheet rubber can come in a variety of durometers ranging from 30 Shore A all the way up to 90 Shore A.  Like many of our other rubbers, they can be used for gaskets, seals, shields and other applications that require toughness.

                     

                                                                    (Sheet Rubber)
Another rubber based material we have available is thermoplastic elastomers, or more commonly known as TPE. TPE is a blend of plastic and rubber that creates a flexible and durable product. The combination of plastic and rubber bring the best qualities of each material to one product. Our TPE is able to withstand high temperatures while also having good cold weather impact resistance. It also features a clean appearance, so exterior parts look great.  It is very cost effective and can be manipulated or bent using heat to obtain a permanent shape. 

                         

                                                                            (TPE)
If you would like to implement some of our rubber products for your application, contact your account manager today. You can also call us at 262-783-3300 or email us at info@milcut.com.
               

Copyright © 2016 Milcut Inc., All rights reserved.


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