Plastic Spotlight: Redcomp 300A

One plastic we offer though not on our website’s list currently is the remarkable Redcomp 300A. This is a super strong (14,000 PSI bearing) composite material with incredible strength, self-lubrication, and an ace up its sleeve. This product was invented for use in marine applications, particularly those involving salt water. Anyone who’s worked with equipment in marine applications knows that salt water brings with it corrosion and rust issues. But Redcomp 300A is immune from the effects of salt water.

In addition, PTFE is layered in the resin. PTFE is an exceptionally slick and chemical resistant dry lubricant and is embedded throughout the entire product. This can be confusing as customers will sometimes request the addition of a bearing into their Redcomp 300A part…But the Redcomp material itself is a bearing! And a much better one than any you could press in. To put things in perspective, the Redcomp 300A has a 0.08 coefficient of friction. Redcomp 300A material should run by itself on the shaft. Other benefits include continuing operating temperatures from 266 degrees Fahrenheit to “cryogenic” low temperatures. The product is also impact-resistant, light-weight, and easily machined.

For a quotation on Redcomp 300A material or help with your bearing application please contact us today.

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3 Critical Issues You Need To Know About These Popular Plastics

Many industrial plastics can “overlap” in applications where sometimes the optimal choice is only marginally better than several others. Many plastics may work in an application, such as nylon and acetal for sheaves, but certain issues in the operational environment may mean you need to stay away from a certain plastic! Three of the most popular plastics we carry are UHMW polyethylene, cast nylon, and PTFE. But each of the following has a critical issue you need to know about that often discredits the material in certain applications.

UHMW – Impingement

UHMW is a great wear material at an affordable cost…Usually. The one place where it isn’t good at all is with impinging wear, that is wear from a mating partner (could be anything from grains, to rocks, to another sliding component). Impingement is when something hits that UHMW on an angle. With UHMW anything that is remotely abrasive needs to hit it on a 90 degree angle. If the angle is any sharper you risk very quick deterioration of the UHMW plastic. It simply does not hold up to impingement. Often polyurethane, which has excellent impingement resistance, is a substitute and one can be creative, for example only using polyurethane in the impact zone and use UHMW for the rest of the application.

Nylon – Cold Temperatures

Many people know that nylon is affected by moisture swell, what fewer people know is that it gets brittle in cold temperatures, about 10 Fahrenheit or -12 Celsius. This can come as a shock, as nylon is known as a high-load plastic able to handle 4,000 PSI in bearing applications. It is not intuitive to think that cold temperatures would greatly affect the nylon but it is true. Fortunately, replacements are available, specifically Redco Tuffkast is often best to replace nylon. Tuffkast solves not only cold weather issues with nylon but also absorbs much less moisture, so Tuffkast’s properties help in that case as well.

PTFE – Wear

It is often that customers request PTFE for a wear or lining application, even including heavy applications such as dump truck liners! We do try to warn them that PTFE has very poor wearing ability. It is a soft, almost waxy material, that while it is available in sheet form (and seems solid enough) it really cannot hold up to aggressive wear. Bronze filled PTFE is available which increases the wear capabilities; however, by that point there is often a less expensive, more available plastic, that can be suggested as a replacement. PTFE should be avoided in high wear applications wherever possible.

Hopefully you are surprised by at least one of those points, in the hopes that it will assist your material choice in your next application.

To discuss the optimal plastic for your application, get in touch with us today.

Outrigger Pads: How To Spec Pad Size

Most of the time selecting a size of Redco outrigger pads isn’t rocket science: you get pads with the same length x width that came with your equipment. However, when for whatever reason this is not possible, there is some simple math you can do to figure out a safe outrigger pad size*. You first need to know the softest type of ground you may put your pads on. In general, 20-22 PSI (virgin soil) works well. Next, you need to take a look at a decal that should be on your outrigger pad feet. It should say a maximum force that foot could put on the ground.

Finally, you need to know the area of the outrigger pad you want to place your outriggers on. Here are the most common measurements:

18″ x 18′ = 324″

24″ x 24″ =576″

36″ x 36″ = 1296″

42″ x 42″ = 1764″

48″ x 48″ = 2304″

Let us work through one example. Assume the decal on your outrigger foot reads 30,000 pounds as it’s maximum force that could be applied. Let us consider the 24″ x 24″ pads, the math goes like this: 30000 / 576 = 52.08

52.08 is the PSI is the pressure at max load the foot would be putting on the ground through the pad. This is too much force for virgin soil, so we must go larger. We then consider 48″ x 48″ pads:

30000 / 2304 = 13.02

Much better! 13.02 is far below the 20-22 PSI we’re looking for and should be a safe amount of load to put on the ground in most situations. And it’s always better to be safe than sorry with a crib.

For a quotation on our Redco Outrigger Pads, please contact us.

*These guidelines come from the October 26th, 2005 “Safety Bulletin” by the American Concrete Pumping Association. Redwood Plastics accepts no liability for use of this information leading to a poor crib or accidents. As always, the operator of equipment has sole discretion on how to create a safe crib.

Anti-Slip Matting And Tiles

Redco anti-slip matting and tiles are a versatile and easy-to-install solution for slippery areas. The tiles are made of tough, wear-resistant plastic and are made of 100% recycled materials. In fact, the system is a “closed loop” wherein recycled tiles are made into the new product. The tiles are not degraded by heat, cold or sun exposure and come in a variety of colors and with or without grit surfacing. The tiles are resistant to most chemicals and fungicide. They are also manufactured with an interlocking system on all four sides to connect with each other or sloped plastic edging which is available to make your tiles into an eyewash station, for example.

The most common tile profile, commonly referred to as the “standard” is 12″ x 12″ x 3/4″ thick but tiles are also available 12″ x 24″ and 36″ x 36″ and in 1/4″ and 1/2″ thicknesses. Common applications for the tiles include anti-slip walkways besides pools, industrial facilities, wet food processing areas, showers, locker rooms, ramps, the only limits are a sturdy substrate and your imagination. To see our brochure for the anti-slip matting please click here.

For a quotation on these tiles please contact us today.

BRAXX Anti-Slip Surfacing

After decades research and design, several “anti-slip” plastic options are now available and BRAXX should not get lost in the shuffle. BRAXX is a standardized UHMW based anti-slip plastic which comes in 36″ x 108″ sheets that are 0.30″ thick. The material comes in two forms “BRAXX Sand” which has a base color of blue dotted, with a sand-impregnated surface and “BRAXX Luns” which has a high-visibility safety yellow colored base and is dotted with LUNS clean coal slag anti-slip grit. BRAXX serves as a heavy-duty replacement for anti-slip tapes and paints. Both types of BRAXX are comparable in price and effectiveness, it comes down to personal preference for color and grit.

Applications for the two materials have few limitations. At 0.30″ thick, BRAXX is non-load bearing and is meant to be placed on top of another surface, typically flooring, stairs, etc. As the plastic is UHMW nothing sticks to it and mechanical fixation is required: you will not to bolt or screw into the substrate. Advantages of BRAXX are that it will not rot, rust, absorb moisture, or otherwise corrode. It is impact resistant and easy-to-install on top of other substrates such as wood, aluminum, or steel. Originally developed for the U.S. military, BRAXX is now available to the general public.

For pricing or information on what BRAXX can bring to your application, please contact us today.

 

Nylon For Specialty Applications

Nylon is a family of plastics with several different additives that make them suitable for applications where natural-grade nylon isn’t optimal or won’t be successful. There are three grades of nylon specifically that should be highlighted for their properties in applications with unique demands.

Firstly Redco SL which offers a low coefficient of friction with excellent wear resistance. It was developed for applications where external lubrication is either very difficult or impossible. Redco SL performs better than other nylons and many plastic where the part is rarely accessed for maintenance.

Secondly, Redco glass-filled nylon serves very well for prototypes. The glass filling results in a very dimensionally stable part which can be held to tighter tolerances. This part also has the lowest “cold flow” of any nylon. If you’re looking for a “proof of concept” part than Redco glass filled nylon is an excellent choice.

Lastly, Redco blue is a grade of nylon for high-heat applications, able to withstand up to 250 degrees Fahrenheit ongoing in application. This alone isn’t especially unique, as several plastics such as PTFE handle temperatures just as high. However, Redco blue nylon is the best “bang for your buck” for a heat-tolerant plastic. The alternatives such as the aforementioned PTFE, PEEK, ULTEM, etc. are all much more expensive. If you’re having trouble finding a heat-tolerant plastic and you know your application is 250 degrees F or less, then Redco blue may be an excellent choice for your application.

To see if the Redco nylon products listed above or another plastic is optimal for your application, please contact us today. 

Coffee, Baseball, And Polycarbonate

Today we’re highlighting a recent application by our Spokane branch. Recently we were contacted by Dutch Bros. Coffee who has a location at Avista Stadium: home of the Spokane Indians baseball team. Dutch was looking for a clear plastic to protect their storefront signs and graphics. General-purpose polycarbonate was chosen for its excellent impact strength which will prevent breakage from anything from vandalism to accidental bumps. In addition, the polycarbonate is much more forgiving with drilling than acrylic – and several screws were tapped into the sheet. The polycarbonate was 3/16″ thick for this application. The picture below shows the completed application.

For help with your polycarbonate needs please get in touch with us.