Engineering

Thermoset resins systems have been used in engineering applications for over 80 years. Greenfield Polymers provide a unique service in providing engineers with the link between their imagination and the possibilities thermoset resin systems can offer. With the support of Greenfield Polymers from conception, analysis, trial and production the organisation is able to work alongside engineers to make their imagination a reality.

Greenfield Polymers offers a vast amount of application, processing and performance experience and over 500 clients world wide have turned ideas into reality. Greenfield Polymers offers a unique service of formulating products to your requirement rather than offering a set range of products gives you an infinite realm of possibility. With continued research and development programmes Greenfield Polymers also offers continued improvement and updates for all its clients to ensure the latest technology is continually utilised, ensuring our clients continue to lead the field in their engineering applications.

Greenfield Polymers also prides itself on confidentiality of the client and does not openly seek to optimise on a clients successful implementation of a product. Greenfield Polymers is a raw material supplier and therefore does not operate or own any other portfolio of Companies which use the product in mixed form.

• Casting – polyurethane can be readily used to form variable wall thicknesses and allows the engineer the luxury of putting material only where it is needed.
• Material thickness can range anywhere from 1mm to 30mm.
• In terms of rigidity and toughness therefore rigid polyurethane compares favourably with other plastics and although it may seem to fall short of the common metals, in practice a component can be designed which adequately fits the mechanical needs and then excels in low weight.
• Further its primary benefits emerge when we consider its ability to be moulded cold.
• The material fluidity at moulding means an ability to form complex three dimensional patterns to near net shape, with minimum draft angles, often zero.
• The polyol / resin is mixed with an isocyanate / hardener and fed to accurate but inexpensive moulds at room temperature.
• The process uses techniques very similar to sand cast metals.
• Mould design is of course critical, but material flow characteristics are very similar to gravity cast metals but with few of the problems found at the higher temperatures necessary for metals.
• Casting at room temperature, the process lends itself to accommodating inserts, not only to minimize the shortfalls of tensile strength for example by insetting threads or bearing surfaces but also more delicate items such as electronic packages, connectors, co-axial components etc. without risk of damage.
• The versatility of finish offers the engineer both a decorative external appearance and inner surfaces capable of incorporating EMC/RFI screening or mechanical strengthening components.
• External finish can also be textured to give a pleasant feel.
• Quickly produced, low cost tooling, capable of producing up to 2000 off moulds and material costs favorably for anything from pre-production prototypes to low even medium volume production runs.
• Engineering of thermoset resin systems can be broken down into 5 main areas: Coating, Adhesives, Sealants, Encapsulation and Casting. The biggest field is Casting when viewing Polyurethane, Epoxy and Silicone as a replacement for traditional methods in engineering.