Why is PVC processing additives used in SPC flooring?

【Why is PVC processing additives used in SPC flooring?】

SPC flooring is a new type of floor covering material primarily made from polyvinyl chloride (PVC). PVC processing aids are used during production for the following main reasons:

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• Improving plasticization performance: SPC flooring typically contains a high proportion of inorganic fillers like calcium carbonate, making plasticization challenging. PVC processing aids such as #Junchuang#JC-880 (a polymeric silicone compound) promote the plasticization and melting of PVC resin, lowering processing temperatures. This enables materials to achieve optimal plasticization at lower temperatures, enhancing production efficiency and product quality.

• Enhance flowability: SPC flooring production demands high material flowability to meet requirements like high extrusion speeds and in-line lamination. PVC processing aids increase material flowability, facilitating melt passage through molds and reducing defects such as bubbles and flow marks.

• Strengthen Melt Strength: During SPC flooring calendering and extrusion, melt strength is essential to prevent material slippage and drop-out. PVC processing aids interact with PVC molecular chains to enhance melt strength, ensuring production stability and dimensional accuracy of finished products.

• Reduce screw and barrel wear: As SPC flooring is a highly filled system, inorganic particles cause significant wear on screws and barrels. PVC processing aids facilitate partial plasticization of organic components in the raw material, enabling better encapsulation of inorganic particles. This reduces direct contact between inorganic particles and the screw/barrel, extending equipment lifespan and lowering production costs.

• Enhance product performance: Certain PVC processing aids also provide plasticizing, toughening, and weather resistance properties. These improve the physical and mechanical characteristics of SPC flooring—such as impact strength, toughness, and abrasion resistance—making the flooring better suited for its intended applications.

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