Pumice as a Functional Filler and Extender
Hess Pumice Products manufactures a line of micronized, non-hazardous amorphous silica products as functional fillers and extenders for paints, coatings, rubber, and plastics.
Because crystalline silica (CS) is now classified as a carcinogenic (and a cause of silicosis), manufacturers who have traditionally relied on an abundant supply of crystalline silica for their products are facing increasing pressures in regards to environmental concerns, health issues, and workplace rules.
Alternatives for CS have been few and often hard to source—until now. Hess Pumice produces a Non-Crystalline Silica (NCS) with all the beneficial features of CS without the health risks. Our product is an Amorphous Aluminum Silicate, including nearly 80% SiO2 (see Typical Chemical Analysis, below).
Our NCS products have a lower density than CS and cannot replace CS on a drop-in basis, rather, NCS must replace CS—or any other filler—on a volume basis, rather than by weight. This results in higher bulking values and higher yields per pound of NCS product verses CS product.
Gloss and sheen control with NCS is, in general, equal to and usually better than CS products. Hiding power can also be improved using NCS products. Additionally, NCS products work well as a replacement for Zeospheres in coatings.
|Applications for the Hess Pumice Non-Crystalline Silica fillers include:|
|Industrial Coatings||Rubber Compounds|
|Architectural Paints||Plastics/Fiberglass Compounds|
Hess Pumice provides seven Non-Crystalline Silica products developed specifically as functional fillers for the paint/coatings and rubber/plastics industries. The grades are: NCS-3, NCS-5, NCS-8, NCS-10, NCS-12, NCS-15, and NCS-20 (with the numbers indicating the average particle size in micron). [DOWNLOAD NCS GRADE SPEC SHEETS]
Our amorphous aluminum silicate products are non-hazardous (crystalline silica free - to the detectable limit of .05%), inert, near white, pH of 7.2, with unit weights (loose) ranging from approximately 1.6 kg/gallon for the finer grades up to approximately 3 kg/gallon for the coarser grades.
Our NCS products provide outstanding scrub, burnish, and stain resistance properties due to the hardness of the particles (5.8 Mohs hardness).
Availability and Packaging
The Hess Pumice NCS products are shipped world-wide with standard packaging being in 20 kg poly-lined bags, 50 lb poly-lined paper bags, 500 kg bulk bags, and 2000 lb bulk bags.
Hegman results start at approximately 5 for the coarser grades. Oil absorption ranges between 30% to 40% depending on the grade. These products are also known for their outstanding durability & weathering properties, including no known instance of frosting or chalking after several years exposed to the elements. NCS grades are also used in sheen control applications.
|Hegman||5 to 8|
|Oil Absorption %||34 to 40|
|Moisture||less than one percent|
|TYPICAL CHEMICAL ANALYSIS||GENERAL PHYSICAL PROPERTIES|
|H2O:||< 1.0||Softening Point:||900 degrees C|
|Na2O:||1.6||Crystalline SiO2:||None Detected|
REQUEST A SAMPLE OF OUR NCS or to talk to a pumice expert
Call for a sample of the brightest and hardest Amorphous Aluminum Silica commercially available in the world. It is near-white in color, neutral in pH, non-toxic, non-hazardous and has great hardness for outstanding durability and low oil consumption.
PUMICE SAMPLE: We have provided an online sample request form to expedite the processing and delivery of your pumice sample.
SALES: If you need to talk availability, grades or grade blends, logistics, costs...contact Mike Hess Jr., Sales Manager, at extension 147 or email email@example.com
RESEARCH: Perhaps you are exploring the possibilities—thinking pumice may fit your particular filler extender need, thinking you’d like to run some tests—then we invite you to contact Brian Jeppsen, VP Research and Development, at (208) 766-4777 x111 or email: firstname.lastname@example.org