Rubber and Thermoplastic Elastomers
Figure 24 Different parts of rubber

Natural Rubber (NR) and thermoplastic elastomers are stable, resilient, easy to work with and highly durable materials. Elastomers are used where their characteristic properties are required, i.e. when rubber-elastic behaviour in the application temperature range is necessary. A distinction can be made between natural rubber (NR) and synthetic rubber, such as styrene-butadiene rubber (SBR), chloroprene rubber (CR), butyl rubber (IIR), ethylene propylene diene rubber (EPDM), butadiene-acrylonitrile rubber (NBR) and silicone rubber (Q). Even though synthetic rubbers have been further developed in recent years, the properties of NR remain unrivalled, especially in terms of permanent elasticity, cold elasticity and abrasion resistance.

According to DIN 7724 and ISO 472, further distinctions are made between elastomers and thermoplastic elastomers.

  • Elastomers: rubber elasticity is present at temperatures below 20ºC (70ºF).
  • Thermoplastic elastomer: rubber elasticity is present above 20ºC (70ºF) up to the decomposition temperature.

The following are typical properties of rubber and thermoplastic elastomers:

  • They are elastic.
  • They are not meltable.
  • They do not have thermoplastic properties (thermoplastic elastomers are an exception to this).
  • They are not soluble in solvents.
  • They can swell when they come into contact with solvents.

For more detailed information regarding rubbers, see the Loctite Design Guide for Bonding Rubber and Thermoplastic Elastomers.

Table of contents


have already
signed up

Award winning manual

Platinum Award for LOCTITE®X Digital Manual

The Digital Manual is for professionals by professionals

The manual is made entirely for you. However, if you’re still not convinced that free industry knowledge is for you, take a look at these user testimonials from the users of the manual.

"The topics are such that I can help take design related decisions very well at work. It's an interesting and knowledgeable read, I recommended my other colleagues to have a look at the manual as well."

Hanumant, Production Incharge

"The manual's chapters significantly enhanced my comprehension of various engineering topics. The manual adeptly presents explanations and examples of concepts, showcasing a high level of clarity and effectiveness in its content."

Tejas, Mechanical Engineer from a renowned Engineering College

"The release of this manual by a renowned brand such as Loctite has proven to be highly motivating for students. Its authentic content serves as a source of inspiration, encouraging students to engage actively in reading and learning."

Padmakar Deshmukh, Professor at an Engineering College