Rigid PVC Residential Siding Using Specialty Minerals PCCs and Talc
The ready availability of wood in North America has driven the
concept of the stick built house. In this method, a wood frame built
piece by piece is covered in wood sheathing, and then a roof and siding
are applied. Typical siding materials are wood, aluminum, steel, and PVC
(vinyl). Because of its utility, low maintenance, and competitive
installed pricing, vinyl siding has been a runaway favorite for more
than a decade.
Specialty Minerals Precipitated Calcium Carbonate in PVC Siding
chloride house siding has dramatically, changed the face of house
building. This is a demanding application for PVC because of the high
level of product performance required to displace more traditional
materials such as wood, brick, stucco, and stone. PVC offers a colorful,
lightweight, maintenance, free, cost-effective alternative to
traditional materials. Delivery of these benefits requires careful
attention to formulation and processing issues. Precipitated calcium
carbonate (PCC) from Specialty Minerals Inc. (SMI) affords superior
impact resistance, dimensional stability, and surface appearance.
Whatever specific balance of properties you are searching for in PVC,
there is a SMI PCC to help you reach your goals. See our product
selector chart to make your choice or, for a customized recommendation,
contact us with the details of your specific application.
Click on a product name to download the data sheet for the product or
on a property to download the SMI brochure “Fillers in PVC – A Review
of the Basics”. Click here to download a brochure on Tuffgard® PCC in rigid PVC.
Impact strength is a key requirement in house siding, but compounders
cannot lose sight of formulation costs in meeting these impact
requirements. SMI’s Tuffgard® and Ultra-Pflex® PCCs give formulators the added edge they need to balance cost and impact strength, while our Super-Pflex®
PCCs impart balanced properties at lower cost through higher resin
extension. Reduction or elimination of rubber-based impact modifiers is
possible when using Tuffgard® and Ultra-Pflex® PCCs.
profile dimensional stability is another requirement in house siding
where exposure to sunlight raises part temperatures to critical levels.
Built-in stresses from extrusion processing can promote dimensional
instability where high heat levels are possible. Localized hot spots can
lead to part warpage. The small particle size of Tuffgard®, Ultra-Pflex® and Calolfort®S PCCs promote melt homogeneity in profile compounds while reducing long-term dimensional changes. Ultra-Pflex® and Calolfort®S PCC have added benefits, imparting whiteness, high surface gloss, and smooth appearance to critical appearance-grade parts.
Download the SMI publication “The Effect of Calcium Carbonate Size
and Loading Level On the Impact Performance of Rigid PVC Compounds
Containing Varying Amounts Of Acrylic Impact Modifier” by clicking here or download the publication “Adding Value to PVC Formulations with Ester Lubricants and Fine Calcium Carbonate” by clicking here.
Talc for Higher Temperature Applications of PVC Siding
talc products deliver higher flexural strength levels even as
temperatures climb. This is important in darker-colored siding products,
particularly in hot climates such as the U.S. Southwest. House siding
markets continue to experience high growth levels and SMI’s broad
product line of calcium carbonates and talcs will enable you to offer
your customers the highest level of cost-competitive, high-quality
Click here to download the SMI paper “Increasing the Flexural Modulus of Rigid PVC
at Elevated Temperatures” for more information and data on the use of
talc in rigid PVC.