From a molten liquid state, polyurethane may be fabricated or molded into low-density flexible foam, low-density rigid foam, soft solid elastomers (gel) and hard solid plastics. Valued primarily for its uses in rigid and flexible memory foams, polyurethane is extremely useful in solid plastic form as well. Read More…
Leading Manufacturers
American Urethane, Inc.
Odenton, MD | 800-394-7883A manufacturer of custom polyurethane molding, American Urethane serves a variety of industries, including chain conveyor equipment, material-handling, power tools, computers and medical.
Unicast Inc.
Easton, PA | 800-275-0818If you are in need of premiere polyurethane molding, then you have come to the right place. We precisely mix all kinds of urethane blends including blends between 20A and 90A as well as 70D. We have the expertise to design urethane sheets, rods, and tubes, as well as urethane covered parts. Many standard colors are available and can be cut to whatever size you require.
FallLine Corporation
Reno, NV | 800-325-5463FallLine has been a manufacturer of custom polyurethane molding products for various industries since 1981. We offer a wide range of proven materials ranging from 40A - 80D, as well as the capability to formulate materials to meet specific needs.
Mearthane Products Corporation
Cranston, RI | 401-946-4400MPC has been Shaping the Future of Polyurethane since 1965. Applying technical diversities in R&D, engineering and fabricating to sophisticated thermoset cast polyurethane processing sets MPC apart. A library of MPC patents is available to perfect your custom application.
Weaver Industries, Inc.
Denver, PA | 717-336-7507We utilize the right tools for handling your tasks. We manufacture polyurethane molding solutions here in the USA. Our products are ideal substitutes for rubber, metal and other types of plastics due to the polyurethanes rigid but lightweight design.
Urethane Casting - FallLine Corporation
Although all elastomers maintain strength and versatility in many industrial applications, polyurethane elastomers possess several advantages over other elastomers and materials.
For instance, urethane casting combines many of the desirable qualities of plastic, rubber and metal with longer service life than plastics, higher impact resistance than rubber, elastic memory, noise reduction, heat and chemical resistance, and many other properties.
Urethane Casting - FallLine Corporation
Additional benefits of cast urethane include: higher abrasion, cut, tear, oil, ozone and radiation resistance, lightweight, easily moldable, non-conductive, non-sparking, greater load bearing ability, broader hardness range and better colorability than rubber.
Cast urethane products include wide variety of pneumatic seals, press tool blocks, conveyor bushings, bumpers, bowling balls and parts for a broad spectrum of industries such as construction, automotive, food processing and athletic equipment.
The raw materials of polyurethane exist in a liquid state, which allows for easy mixing and measuring in preparation for molding, which may be open casting or closed casting.
Raw materials react with one another to form a pre-polymer, then during the urethane molding process, a curative is introduced to the pre-polymer in order to complete the polymeric transition. Accelerated by heat and/or pressure, the mixture is poured into a mold cavity and cured to form the final polymer.
During open urethane casting, the pre-polymer and curative are heated and mixed together, poured into an open cavity and cured without the application of pressure. During closed urethane casting processes such as injection molding, the pre-polymer and curative are heated and mixed together, then injected into the closed cavity through small holes.
An example of a type of urethane casting would be compression urethane casting, which is commonly used to make small polyurethane parts such as gears. Additionally, cast urethane serves better than regular plastic in many applications, as it has higher impact, low temperature, cold flow, radiation and abrasion resistance, better elastic memory and noise reduction capabilities, greater resilience and provides lower cost tooling.
The cost of urethane casting is on par with the cost of rubber and typical polymer molding, giving urethane an economic advantage as well.