Authentic vs. Fake Products
This page serves to shed light on how the leading competitor's products use fake materials and how they measure up to genuine Staymag products, produced by Subtle Design.
Pressure Sensitive Adhesive
The leading competitor, who shall remain un-named, advertises using 3M 468MP adhesive. We have discovered that they are using counterfeit adhesive that offers much less adhesion compared to genuine 3M adhesives.
These are very tall claims to make, which we will back up with comparative observation using a known genuine 3M 468MP adhesive purchased via Digikey. The evidence of such claims is in the following images.
Known 'control' genuine 3M 468MP adhesive uses bold, correct typeface whereas the competitor's fake adhesive uses an incorrect and thin typeface on the adhesive liner:
Genuine 3M adhesive branding uses a square printing pattern on the adhesive liner whereas the competitor's fake adhesive uses an incorrect diagonal printing pattern:
Staymag uses genuine 3M LSE acrylic adhesive produced in the USA and is the correct adhesive for bonding to the low surface energy surface of the magnet material. The competitor's adhesive is the wrong choice for bonding to the low surface energy surface of their magnet material.
The competitor claims to use a special formula flexible magnet material that is rated for high temperatures and has increased their advertised rating by 20 ºC to try to appear to be as good as Staymag.
Through comparative observation using specimens submerged in 15mL of Acetone for one hour, we can verify that the material is nothing more than a standard CPE/PVC binder based 'refrigerator' magnet material.
The specimens are a 'control' standard grade refrigerator magnet material, produced by Arnold Magnetics, the competitor's magnet material, and finally Staymag. The control specimen and the competitor's specimen did not react in the Acetone, whereas Staymag showed visible signs of curling. Images are after the paragraphs below.
There are only a finite amount of high temperature flexible magnet binder materials produced, so the competitor's specimen would've reacted similarly to the Staymag specimen if they were truly using a high temperature resistant magnet material.
Staymag was originally developed to be continuously submerged in hot oil sumps in vehicles and machinery, so it is the correct material of choice for longevity and high demand, continual usage on 3D printers. CPE and PVC binder materials used in competitor's products are unsuitable to be used for long term high temperature applications and offer no such stability.
The binder material that binds the magnetic powder together is what is of concern, not the magnetic powder itself.
It shall be known that the Curie temperature is not of concern of standard flexible magnet materials, because Strontium ferrite is used as the magnetic powder material in the majority of flexible magnets. The Curie temperature for Strontium ferrite, in Celsius, is 449.85 ºC, which is far beyond what a 3D printer's heatbed will ever see in usage.