
HIFILL® N
FUNCTIONAL MINERAL FOR PLASTICS AND ELASTOMERS
You can achieve excellent contact clarity with as much as 10% HIFILL® N in LDPE.
You don't have to fear the filler when you want to reduce costs!
Come by our booth to fight your fears
BOOTH S12151
NPE Plastics Show in Orlando, FL May 6-10, 2024
It used to be a general rule: if you want transparency, you stay away from fillers. In other words, if you want the best clarity - you pay for it. But you have another option - HIFILL N (nepheline syenite) is the filler that will reduce formulation cost without sacrificing contact clarity.
HIFILL N Makes a Clear Difference
More Reasons to Choose
HIFILL N Functional Mineral
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Covia’s HIFILL® N (nepheline syenite) is a safer, silica-deficient functional filler widely used in a variety of polymer applications.
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Micronized sizes are valued for purity of color, gloss control, antiblocking in polyolefin films, ease of dispersion with low viscosity build, abrasion, and superior weather resistance.
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Covia’s HIFILL N is mined from one of the world’s largest, higher whiteness, and more chemically consistent deposits found in Blue Mt., Ontario Canada.
Product Highlight
Superior weatherability
Extended durability as result of superior photochemical stability and improved color fade resistance relative to calcium carbonate and talc.
Improved physical properties
HIFILL N has been used to improve scratch and mar resistance.
Regulatory compliance
No reportable free crystalline silica, improved industrial hygiene, safer solution - does not require silica-related labeling; FDA-approved for up to 50% by weight in the final product.
Lower oil absorption
Chemically inert, allows synergy with other additives. As a result, customers are able to achieve optimal formulation designs.
Improved dispersion color extension
Transparent, color neutral which allows for optimum usage of darker pigments and helps with pigment dispersions.
HIFILL N is made of nepheline syenite, which is a unique all-natural sodium-potassium alumino silicate mineral that is silica deficient. This mineral is responsibly mined from one of the largest and most consistent high-purity ore reserves located in Blue Mt. Ontario Canada. HIFILL N additives are available in ultrafine, precisely controlled particle size distributions for optimum performance. HIFILL N allows for formulation and processing cost reduction while not adversely impacting the products’ physical properties and durability.
Mineral:
Nepheline syenite (Blend of three feldspars: albite, nepheline and microcline)
Product category:
Functional filler, pigment, extender
Applications:
Excellent functional filler in wide variety of commodity resins and applications
Stay up to date with current certifications
*Applicable only for Covia's Blue Mountain nepheline syenite (Blue Mt. ON, CAN deposit)

Authorized for food contact applications by the U. S. Food and Drug Administration as a pigment dispersant and filler in all types of food contact polymers and can be used at up to 50% by weight of the polymer.

Complies with Restriction of Hazardous Substances (RoHS).

Complies with Coalition of Northeast Governors (CONEG).

Kosher | Pareve – Except Passover.

EU Plastics Regulation No. 10/2011, as amended, explicitly cleared for use in all food-contact plastics without limitation (FCM No. 684).

As a naturally occurring, chemically unmodified mineral, nepheline syenite is exempt from REACH registration and is automatically included in the US, Canada, EU, Australia, Korea, Japan, China, and the Philippines chemical inventories.

Included on Japan’s Positive List (PL) maintained by the Japanese Ministry of Health, Labor and Welfare (MHLW) and cleared at loading levels up to 50% in all plastics with no other restrictions.

China’s National Health Commission (NHC) approved for use in all plastics at levels up to 50% with no other restrictions.
Product Overview: HIFILL N Advantages
Regulatory Compliance Overview: Safety & Regulatory Brief
Case Study: How Minerals Affect Color Fade
Technical Bulletin: Safer Alternative as a Functional Filler in Silicone Elastomers
White Paper: Nepheline Syenite as the Smart Alternative to Crystalline Silica Fillers in Silicone Elastomers
OUR LAB IS YOUR LAB
You can think of us as an extension of your R&D team. Our lab is your lab to enhance value by solving your manufacturing challenges and customizing polymer solutions, all part of the team’s day-to-day expertise. Here, in our lab, we continue to expand the knowledge base of nepheline syenite, microcrystalline silica, and air-floated kaolin to prove the technical advantages of our functional fillers compared to other minerals and to further your plastic product proficiency.

OPTIMIZE FORMULATION COST WITH GREATER ADDITIVE PERFORMANCE
Chemically inert, nepheline syenite offers superior performance and longer service life in demanding applications with reduced formulation cost. Nepheline syenite’s synergy accepts a lower amount of expensive UV stabilizers, lubricants, heat stabilizers, and other additives, saving money.
The lower oil absorption could also translate into minimal interference with other additives. The unique combination of low oil absorption and particle morphology enables higher loadings in masterbatches.
The transparent, color-neutral functional filler supports color extension in pigment dispersions. Outstanding purity and low tint strength preserve colorant integrity while heightening pigment dispersion. Lower pigment loading can be achieved while maintaining the same color strength to reduce formulation cost further.
- Formulation cost savings could be enabled by its transparency and low oil absorption
- Does not interfere with other additives

FULLY-FOCUSED ON RESPONSIBLE MINING
Covia manufactures HIFILL N at our Canada nepheline syenite plant (NSO), adhering to Environmental, Social, and Corporate Governance (ESG) principles. Long before ESG was a fundamental corporate conversation, Covia was leading the way with a vigorous social responsibility commitment to our team, communities, and planet. For example, our NSO plant is the fourth-longest standing member of the Wildlife Habitat Council with gold certification beginning in 1996. In addition to an environmental pledge, the staff donates time, talent, and funds to actively support our local communities.