Rigid or Unplasticized PVC Fence and Decking With Specialty Minerals Precipitated Calcium Carbonates


Fence and decking are demanding applications for PVC because of the high level of product performance required to displace more traditional materials such as wood, steel, and aluminum. PVC offers a lightweight, maintenance-free, cost-effective alternative. Delivery of these benefits requires careful attention to formulation and processing issues. Precipitated calcium carbonate (PCC) from Specialty Minerals Inc. (SMI) delivers 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.


Specialty Minerals Precipitated Calcium Carbonates in PVC Fencing
Impact strength is a key requirement in fence and deck parts but compounders striving to meet these requirements must watch formulation costs as well. SMI’s Ultra-Pflex®, and Calofort® S PCCs provide the added edge formulators need to balance cost and impact strength by allowing them to reduce or eliminate rubber-based impact modifiers. In addition, PCCs do not suffer the low-temperature fall-off in impact strength typical of rubber-based modifiers. Super-Pflex® 100 is the PCC of choice where the compounder is interested in high-resin extension ratios within current formulations.


Long-term profile dimensional stability is another requirement in fence and deck parts 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. The small particle size of Ultra-Pflex®, and Calofort® S PCCs promote melt homogeneity in profile compounds, reducing long-term dimensional changes. Ultra-Pflex® and Calofort® S PCCs offer added benefits including high-surface gloss and smooth appearance to critical appearance-grade parts. Fence and deck markets are growing rapidly and SMI’s broad product line of calcium carbonates will help you offer the highest level of cost-competitive, high-quality products.

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.