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RUBBER Dilemma

by David West
Ejection Rubber Dilemma by Dave
The History of MRP
The History of Monroe Rubber and Plastic

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Flat Die Ejection Material

Red Rhino die ejection material Red Rhino™
This is our premier rubber made exclusively by us to our specifications to cover a wide range of applications. For example, use it between .001 and .200 thick substrates when using a .375' thick ejector with .063' surplus over knife height. Red Rhino™ is excellent for folding carton as well as for corrugated diecutting. It is a very economical, tight tolerance, ejector that is recommended for both hand fed and machine fed flat diecutting as well as rotary diecutting. It was formulated to pair ideally with Green G'rilla™ for a perfectly balanced die. This is also ideal for use on male blanker faces.

GreenGrilla die ejection materialGreen G'rilla™
A real powerful, tight tolerance, highly resilient ejector used primarily for small area ejection for proper die ejection balancing. When cut in the Groovy G'rilla™ shape it does a fantastic job of ejecting material from slots as narrow as 1/8' wide. Green G'rilla™ is also well known for its extreme durability.

Super Strip ejection materialSuper Strip
Super Strip is a European, high ejection force product used mainly for slot ejection in both rotary and flat-bed diecutting. As it compresses it does not bulge. This unique characteristic makes it an ideal product for slots and punches.

BK-85 die ejection rubberBK-85
A high density, super-resilient ejector that is very similar to Green G'rilla™. Use in both rotary and flat-bed diecutting for that extra push needed in slots or tightly ruled areas of the die. It's also good as a trim breaker rubber. Very stable. Tight tolerance. Available in the Zig Zag (Groovy G'rilla™) cut as well.

MR75 is a microcellular polymer without all the large holes and
thickness variances of the old standard 75 rubber. It is the new and
improved version that can out perform and outlast the old 75 rubber.
Our new MR75 will help you get jobs on and off press, fast. Add to that extremely competitive pricing and you have good reason to try this.
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13500 die ejection material13500
Sponged cork is an extra, extra firm material that should be used sparingly because of the possibility of tonnage overload. Recommended for flat diecutting in areas of the die where you want to flat crush the substrate. (ie:Glue Tabs)

MR1100 die ejection rubberMR1100
For years, Monroe Rubber has collected data on all types of die ejection materials. When the opportunity arises our engineering staff works to improve our products in order to keep up with advances in the high-speed diecutting process. The release of MR1100 to replace the old Black Open Cell is a prime example of this kind of improvement.
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3500 die ejection material3500
A high quality open cell, "plus" only tolerance, fast recovery ejector. Gives a powerful quick ejection from a very small amount of compression. Less top end loading for reduced pressure to cut excellent ejector for high speed presses cutting thinner substrates. (up to .050' thick knife height) Recommended for flat diecutting.

6500 die ejection material6500
Similar to 3500 but for thicker substrates. (Up to .090' when using a .375' thick ejector with a .063' surplus over knife height) Recommended for flat diecutting.

2700 die ejection material2700
Related to the 3500 and 6500 materials with the same attributes except for thicker substrates. (Up to .125' thick when using a .375' thick ejector with a .063' surplus over knife height) Recommended for flat diecutting.

15700 die ejection material15700
Yet another relative of the 3500, 6500, 2700 family with the same attributes except for even thicker substrates. (Up to .165' thick when using a .375' thick ejector with a .063' surplus over knife height) Recommended for flat diecutting. This is also ideal for use in open cavities on die to reduce substrate sag and vacuum.