Rubber to PTFE bondings for small to medium volumes for a wide range of industries
At times when a traditional seal cannot provide a good solution, bonding rubber to PTFE can be considered as a more viable option. As your custom rubber solutions expert, at Martin’s Rubber, we can support you with designing and developing PTFE rubber bondings to meet your specific requirements.
Thanks to our in-house state-of-the-art machinery and fine-tuned processes, we can produce a vast range of rubber mouldings bonded to PTFE in small to medium volume for a variety of industry applications. These processes can be undertaken in a number of materials, that we have in stock, backed up by full support from our technical experts and subcontractors.
What is PTFE rubber bonding?
PTFE rubber bonding is when rubber is mechanically bonded to a PTFE insert during the moulding process. The process of bonding rubber to PTFE first starts with preparing the PTEF inserts for production using a degreasing system to remove any contaminants from the parts, after which, a heat activated adhesive is applied onto the inserts using a spray-like motion. Thereafter, the moulding process can take place.
As well as PTFE, rubber bonding can also be successfully undertaken with a number of rubber compounds and the following substrates:
At Martin’s Rubber, we are also able to assist you with bonding to more traditional materials, including rubber bonding to various metals, such as stainless steel and aluminium. If this is something that is of interest to you, please feel free to get in touch with one of our technical experts by calling us on 023 8022 6330, or simply send us an email.
More information about rubber to metal bonding can also be found here – simply follow the link.
When might you need a PTFE rubber bonding?
One of the key aspects of rubber is its friction coefficient. Given that PTFE is one of the most slippery solids, it can be extremely difficult for anything to adhere to it. The PTFE rubber bonding process could provide the ideal solution for this.
Friction can often be considered an asset. For example, with tyres, grip is essential and carefully engineered. However, at other times, friction can be a liability, where a compliant rubber seal is required to touch a moving surface in order to control the fluid it is wiping away, but it creates too much friction or wear.
A way of achieving the best of both worlds is through bonding rubber and PTFE together to create a low friction, yet compliant, seal.
Applications where bonding rubber to PTFE is used
Rubber mouldings bonded to PTFE can be used in a number of settings. There are a number of ways in which dissimilar materials can be combined to create high performance products. For example, rotary or linear shaft seals often require a rubber element to energise the lip of the seal against the shaft that it moves against, however, if the tip speed of the seal is too great, it can overheat the fine seal lip and result in excessive wear and leaks. This is where a PTFE rubber bonding can provide an effective solution.
A PTFE insert bonded right at the point of contact of the seal to the shaft can greatly reduce the friction and wear experienced but can still be held in shape by the natural elasticity of the rubber surrounding and supporting it. Seals created by bonding PTFE to rubber can be more expensive to manufacture, but for critical applications where overall performance cannot be delivered in any other way, they are very cost effective in the long-term.
Which type of material can be used when creating a moulding bonded to PTFE?
The majority of polymer materials can be bonded to PTFE, which means a wide range of applications can be accommodated and various grades of PTFE can be used.
In order to achieve optimal strength, even lower friction or improved wear rates, PTFE can also be modified with various fillers that extend the properties of the material to perform in specific ways, yet still bond to rubber to provide the perfect combination for any given application.
Can PTFE to rubber bonding only be used when creating a seal?
PTFE to rubber bonding is not just applicable when creating seals, as this process can be used for developing alternative products, such as composite wear pads where a PTFE block is bonded to a rubber carrier to provide a compliant, yet low friction surface for linear track applications. The possibilities are really endless for this combination of materials.
At Martin’s Rubber, we are experienced in providing a number of innovative solutions for our customers using various materials and techniques in order to deliver real performance gains. If you have an application where a compliant, low friction, seal would be a benefit, then our expertise in bonding rubber to PTFE could be just the solution you’ve been looking for.
Find your PTFE to rubber bonded products today
Our PTFE to rubber bondings deliver excellent adhesion every time. We can help assist you with any unique product designs and can assist you in developing your rubber to PTFE bondings.
For more information on how our technical rubber bonding experts can help, or if you would like to discuss creating a PTFE to rubber bonding, talk to a member of our team today by calling us on 023 8022 6330, or simply email us. Alternatively, fill out our ‘ask an expert’ contact form and our specialists will be in touch.