Polyblade - Turbo Blade - Dispersion Blades

The POLYBLADE is a dispersing blade that can make a difference. It will instantly remove a safety hazard from your plant. Unlike steel blades, it will not get sharp. Teeth are not necessary to achieve an excellent dispersion, which is explained below.

This blade is offered as a RISK FREE trial. If you are not satisfied with its performance after 30 days, you will receive a full credit for the blade which can be used to purchase any style metal blade or other products that we offer. Credits are not given for freight or drilling charges.

The TURBO POLYBLADE has been modified to impart a more aggressive dispersing action. Replaceable high shear pegs without steel studs are molded or fabricated into the blade. Customer trials have reported the ability to disperse higher viscosities, higher solids, faster grind time and lower amp draw though not necessarily all in the same application. The blade has 3 or more pegs on each side. The blade is available in the same materials as the standard POLYBLADE starting at 2″ diameter and larger.

The EMBEDDED PLATE POLYBLADE is available in polyurethane where a dynamically balanced stainless steel plate is molded inside the blade eliminating the use of stiffening plates. Blade assembly is far easier which is especially important in confined space entries. The center area is counter bored down to a thin skin so that it sits flat against the shaft. Worn blades are returned to recapture and reuse the balanced plate.

The POLYBLADE HS is the newest version imparting maximum shear and deagglomeration in addition to the well known pumping power of all the Polyblades. This design is currently available in all materials except Polyurethane.

MAINTENANCE SAVINGS

Outlasts a metal blade
Has no teeth that will bend and deform
Cannot bow or bend
Safer and easier to clean
Will not chew up items that fall into the batch
Cannot be put on backwards
Can be turned over for extended life after the initial side is worn

BATCH CONTROL

Lower heat in most cases
Blade design for creating higher heat is available
Faster batch times in most cases due to improved batch turnover time
Gentle on metal flake pigments & fragile agglomerates
Efficiently incorporates lightweight additives
Effectively lifts and disperses heavy settling additives
Excellent mixing in the slow speed range

There are less expensive plastic blades available. Based upon in-plant trials, the patented end to end radius scoop design makes the difference between an adequate blade and a high performance blade. If it does not have 9 scoops on each side, then it is not the Polyblade.

How can it possibly work better than metal blades with teeth?

The teeth are there to promote axial flow and cutting but not shear. When spinning at high speeds, these teeth create a wall around the flat surface, or shear zone, of the blade forming a barrier that slows the speed of the liquid as it turns axially and flow up the side wall of the tank, which is the main shear zone. The teeth absorb some of the energy, which is why they can wear. They can also bend and break, which further inhibits shear from occurring. The Polyblade is designed with an end-to-end radial scoop that propels the liquid as it leaves the flat surface of the blade, thus increasing velocity and promoting shear. The pumping power is so efficient that the blade is able to effectively move the liquid at slower speeds during the powder additions. The improved process time for incorporation of powders significantly cuts down an overall batch time.

Most of the major coatings companies in the U.S. are using the Polyblade for safety, improved production times, or abrasion resistance. It may sound too good to be true. Sometimes it is. Most times it is not. Give us a call. We would like to get you started on your trial.

SPECIFICATIONS

Materials: Urethane, Anti-Static & Standard Polyethylene, Nylon, PTFE, Polypropylene, Aluminum
Temperature limitations based upon polymer, 160-450 degrees F
Chemical resistance based upon polymer chosen
Stiffening plates required to prevent bolt holes from stretching
Pin holes required in addition to center bore
Effective at tip speeds as low as 3700 fpm
Effective at tank diameters as low as 25%
Minimum of 1-1.5 blade diameters off the bottom of the tank

The Norstone Polymer Impellers are the answer to the negative issues inherent in metal blades. The benefit derived from these blades are apparent in most applications, but especially beneficial in abrasive slurries such as those containing TiO2, silica, calcium carbonate, iron oxide, limestone, and diatomaceous earth.

The two most popular options for these blades are the polyurethane and polyethylene materials. However, this blade is also available in other materials of construction, such as nylon, polypropylene, and PTFE.

Variety of blades: UHMW (black), natural (amber) with keyway bore and stainless steel hub, polypropylene (white), dual hard pigmented urethane (yellow) with center bore, and urethane hub with set screw. Click photo for larger view.

The polyurethane blade is a thermoset material cast in a special mold to meld two different durometers together, giving the center of the blade a rigid construction and the grinding scoops of the blade a softer construction. This material is recommended only for non-solvent products. It is generally cast in bright yellow, but can be made unpigmented, resulting in natural amber. Our newest and toughest material used with the embedded plate is a tear resistant polyurethane.

The ultra high molecular weight (UHMW) polyethylene blade is a thermoplastic material fabricated in an anti-static grade. This material is recommended for solvent-borne products. While it is not as abrasion resistant as the urethane, it is more chemical resistant and still more abrasion resistant than steel. The color is always black due to the carbon impregnation for dissipation of static electricity.

View POLYBLADE Presentation [PDF]