• POLYURETHANE PLASTIC & RUBBER

• SILICONE RUBBER

• CUSTOM PARTS

Lunel Inc manufactures precision cast urethane parts from thermoset polyether and polyester urethanes. We have a full line of specialty urethane plastics & elastomers available in durometer hardness from 30 scale A to 87 scale D as well as ability to formulate materials to your specifications in a range of colors.

Our unique casting methods enable us to produce very complex parts with relatively simple tooling. Unlike with the other standard molding techniques designer does not have to be too concerned with recesses, undercuts and other hard-to-demold part details.

You will be surprised with our rapid process which can produce your sample parts in less than a week, low cost of tooling and parts, and our ability to efficiently produce parts in low quantities (such as one) as well as thousands.

• Steps involved in the process: Send us your drawings!
• What are urethanes?
• Properties of urethane plastics & elastomers
• Typical Applications
• Information Request Form

Steps involved in the process:

• STEP 1. The process begins with you sending us sketches, drawings of your part or idea in any format you have! You can do that by clicking here to e-mail us or by faxing your drawings to 1 (204) 786-2565. Please do not hesitate to ask questions in your e-mail or simply call us at 1 (204) 479-3428.

• STEP 2. An engineer will be assigned to your project, think about it and respond with a quote the same day. He/she may want to contact you before to collect necessary information about your part, material, quantities and number of samples required for testing and approval. In the process, a solid model of your part would be created for mass and volume calculations and a 3-D view of the part will be presented to you in a PDF format with a quote.

• STEP 3. If we receive your P.O. we will go ahead and produce the tooling and required number of samples. Please note that outside of our local area (area code 204) we require 50% of tooling cost to be paid before we can proceed with the job. For your convenience you can now pay for your orders with your credit card via PayPal.

• STEP 4. Samples will be send to you C.O.D. within one week. We can ship your tooling together with the samples or safely store it in our mold storage for later use.

• STEP 5. Production of parts would be as per your purchase orders. Outside of our local area (area code 204) we will require an advanced payment of 50% for your orders. Parts will be shipped C.O.D. on the date reqested.

What are urethanes?

Urethanes are unique engineering materials that have many of the advantages of plastics, metals and ceramics combined with the flexibility and resilience of rubber.

Being liquid systems, urethanes are poured or cast into moulds. Because of their superior properties, urethanes can be much more cost effective to use.

The two basic types of Castable Urethanes are: Polyether Based and Polyester Based. Both have excellent physical properties, though there are natural differences between them that make one or the other superior for a particular product or application.

Properties of urethane plastics & elastomers:

Where abrasion, cutting, tearing, high impact and general abusive use are limitations on your current materials, the answer can usually be found in urethane elastomers. Products made from urethane have achieved a reputation for toughness and durability, which rates them above conventional elastomers and plastics.

Hardness: Urethanes can be formulated to a wide range of hardnesses. The range can fall between 10 Shore "A" to 90 Shore "D". The chart below compares the "A" and "D" scales.

Shore Type "A" 100-A 90-A 80-A 70-A 60-A 50-A
Shore Type "D" 080-D 75-D 46-D 29-D 22-D 18-D

Determining the correct hardness for your application is always a critical factor.

Resilience: Unlike conventional rubbers, urethanes do not have to be soft to be resilient. Hard urethanes can be made as resilient as softer materials.

Compression Properties: Urethanes have greater load-bearing capacity than conventional rubbers of equal hardness. This load bearing capacity is in both compression and shear.

Heat Resistance: Standard formulations are suitable for continuous use only up to 90C (194F) but can withstand temperatures as high as 120C (248F) for short periods in certain applications.

Water Resistance: Urethanes can be resistant to swelling and deterioration when immersed in water, even at temperatures as high as 70C (158F). Water absorption is very low, barely 0.3 to 1% by weight.

Electrical Properties: Urethanes have excellent insulating properties and for this reason are successfully used in potting and encapsulating applications.

Coefficient of Friction: Urethanes resemble most elastomers and plastics in that friction against non-lubricated surfaces generally decreases as the hardness increases.

Typical Applications:

Automotive Applications Body panels, grommets, bearings, bushings, flexible couplings, hose protectors

Building and Construction Applications Molds for concrete, gate seals, mastic shuttering

Fabrics Conveyor belts, fuel storage tanks, power transmission belts, fabric-backed sheeting

Electrical Applications Encapsulation, insulation, potting, cable joining

Engineered Components Gears, sprockets, wire guides, rail draft gear, stripper plates, press brake pads, textile yarn guides, cutting boards, business machine belts, couplings

Food Industry Applications Chute lining, grain buckets

Mining and Quarrying Applications Bunker lines, conveyor rollers, scraper blades, floatation cell impellers, pump linings, grading screens, lined pipe, cross-over pads, dump chutes

Oil, Chemical, and Marine Applications Bushings, bearings, hydrocyclones, buoys, pipeline pigs and scrapers, fenders, valve seats

Rollers Board rollers, nip rollers, metal forming, printing, conveyor, can coating, paper mill

Seals and Gaskets Pneumatic and oil seals, diaphragms

Clothing Industry Shoe soles, bottom molding diaphragms, wear plates, energy-absorbing insoles

Wheels and Tires Pallet truck tires, heavy duty caster wheels, escalator wheels, roller skate wheels

Casting of stock shapes Gears, wheels, pulleys