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If you are producing PET-based flooring and still sourcing stabilizers, lubricants, toughening agents, and processing aids separately, you already know the hidden costs: batch inconsistency, extra weighing steps, supplier coordination, and quality variation between production runs. A PET floor one-pack additive solves all of that in a single pre-compounded system.
This guide covers everything a PET flooring manufacturer, compounder, or OEM needs to know — from formulation principles to processing parameters to how one-pack systems compare to multi-component approaches.
A one-pack additive is a pre-blended functional package that combines all the auxiliary chemistry a polymer processor needs into a single ready-to-use powder or granule. Instead of adding five or six separate additives at the mixer — each with its own dosage, sequence, and dispersion behavior — you weigh out one material and add it at a fixed ratio.
In PET flooring production specifically, this matters more than in most other applications. PET (polyethylene terephthalate) used for rigid flooring substrates — typically as a replacement for or alternative to PVC-based structures — presents a unique set of processing challenges. The base resin tends to absorb moisture, is sensitive to degradation at melt temperatures, requires very precise lubrication to flow correctly through dies and calenders, and must be toughened to survive foot traffic, impact loads, and dimensional stress from underfloor heating systems.
Managing all of these requirements through separately sourced additives creates enormous variability. A one-pack formulation eliminates that variability by delivering a chemically balanced, pre-tested system every time.
Zhejiang Joysun Advanced Material Co., Ltd., established in 2005 and operating from a 32,000 m² manufacturing facility in Pinghu, has developed PET floor one-pack additives specifically designed for high-filler PET flooring systems, including formulations that support calcium carbonate fill ratios up to 1:4.
The function of a PET floor one-pack additive is not simply to make processing easier. It is to ensure that every functional requirement of the finished flooring substrate is met through a single, chemically integrated system. Here is how each functional layer works:
Thermal stabilization in PET processing is critical because PET degrades rapidly when moisture is present at melt temperature. The one-pack formulation incorporates stabilizer components that suppress chain scission and discoloration during extrusion or calendering. This extends the processing window and reduces the risk of batch failure from minor moisture variation in the calcium carbonate filler.
Lubrication in high-filler PET systems is a balance act. Internal lubricants reduce melt viscosity and improve flow at the die, while external lubricants control release from metal surfaces and reduce back-pressure buildup. The one-pack system provides both internal and external lubrication in a pre-calibrated ratio, removing the need for the processor to determine the right balance through trial and error.
Toughening addresses one of the fundamental weaknesses of PET in rigid flooring applications. Unfilled or lightly filled PET can become brittle, especially at low temperatures or in thin-gauge substrates. The toughening component in a one-pack formulation — typically a reactive or compatibilized elastomeric modifier — improves notched impact strength and flexural ductility without sacrificing the stiffness required for dimensional stability underfoot.
Processing aid rounds out the system by improving surface finish, reducing die buildup, and enabling direct powder processing — meaning the formulation can be fed into extruders or calendering lines without a prior pelletizing step. This one-step processing capability is a significant operational advantage for manufacturers targeting high-volume output.
While the exact chemistry of any commercial one-pack is proprietary, the functional ingredient classes found in a well-engineered PET floor one-pack additive are well understood within the industry. The following are the primary categories:
Chain extenders or coupling agents restore or maintain the molecular weight of PET during melt processing. PET is a condensation polymer, and hydrolytic degradation at the melt stage lowers viscosity and weakens the final substrate. Chain-extending chemistry — often based on epoxy-functional copolymers or multifunctional reactive species — compensates for this effect.
Thermal stabilizers and antioxidants protect both the PET matrix and the lubricant components from oxidative breakdown at processing temperatures typically in the range of 230–270°C. Without effective stabilization, discoloration, gassing, and surface defects become recurring problems.
Internal and external lubricants, as described above, control both melt flow and die-surface interaction. Typical candidates include fatty acid esters, oxidized polyethylene wax, and paraffin-based compounds, selected and balanced for compatibility with the PET matrix and the calcium carbonate filler loading.
Impact modifiers or toughening agents, such as core-shell rubber particles or reactive polyolefin-based grafted elastomers, distribute stress across the PET matrix and significantly improve resistance to cracking under bending or impact.
Coupling and compatibilization agents improve the interfacial adhesion between the PET matrix and the inorganic calcium carbonate filler. At high fill ratios (up to 1:4 CaCO₃ to PET), poor interfacial bonding leads to delamination, reduced tensile strength, and uneven surface texture. A properly selected compatibilizer resolves this by creating a chemical bridge between the polar PET matrix and the calcium carbonate surface.
The flagship grade from Joysun's PET Flooring Additive Manufacturing line — designated PET020L — integrates all of these functional components and is dosed at 6–10% by weight of total compound, depending on filler level and target performance.
The case for a one-pack system over a manually assembled multi-component additive approach is built on three pillars: processing efficiency, product consistency, and total cost of ownership.
Processing efficiency gains come from reduced weighing steps, fewer raw material storage requirements, simplified quality control at intake, and a shorter mixing cycle. A factory adding six separate additives at the mixer must manage six separate batches, six separate specifications, and six separate supplier relationships. A one-pack reduces all of that to one.
Consistency is the most technically significant advantage. When individual additives are sourced from different suppliers and batched manually, batch-to-batch variation accumulates. The lubricant balance may shift slightly from one delivery to the next. The impact modifier particle size distribution may vary. Each variation affects melt behavior, surface finish, and mechanical properties in ways that are difficult to isolate and correct. A one-pack formulation, produced under controlled manufacturing conditions with in-process quality testing, delivers a consistent chemical profile batch after batch.
Total cost of ownership for a one-pack is often lower than the sum of its components despite a higher per-kilogram price for the pre-blended system. This is because the one-pack eliminates waste from incorrect dosing, reduces rejected product from formulation errors, lowers labor cost at the mixer, and shortens changeover time. For high-volume PET flooring producers, these savings accumulate quickly.
It is worth noting that one-pack systems are not rigid. Suppliers like Joysun work with customers to adjust the one-pack composition to fit specific processing equipment, filler sources, and performance targets. This means you get a standardized delivery format with a customizable chemistry baseline — the best of both worlds compared to either pure DIY multi-component or an off-the-shelf compound.
For comparison, if you are working with PVC-based substrates rather than PET, Joysun also offers SPC/WPC floor one-pack additives and PVC Ca-Zn stabilizer systems tailored to those polymer matrices.
PET floor one-pack additives are primarily relevant to three groups of manufacturers:
PET flooring substrate producers are the primary target. These are factories running extrusion or calendering lines to produce rigid PET-based flooring layers, often with high calcium carbonate loading to reduce material cost and improve dimensional stability. The one-pack provides the processing chemistry that makes high-filler PET formulations feasible at production scale.
Compounders supplying the flooring industry benefit from one-pack additives because they simplify pellet or granule production for downstream customers. A compounder using a one-pack can guarantee a more consistent compound to their flooring customers without needing to manage a large internal additive inventory.
Flooring OEMs and branded floor manufacturers who operate their own substrate production — or who specify compound formulations to their material suppliers — use one-pack specifications as a quality control tool. By specifying a defined one-pack grade, they lock in performance consistency across suppliers and production sites.
If you operate in any of these categories and are currently managing multiple separate additive streams for your PET flooring line, a one-pack system deserves a serious evaluation. Joysun supports new customers with technical data, processing trials, and sample supply — see the contact section below.
For related flooring chemistry needs, including PE WPC composite lubricants for wood-plastic composite flooring or CPVC one-pack additives for pipe and profile applications, Joysun covers those product categories as well.
For Joysun's PET020L grade, the recommended dosage is 6–10% by weight of total compound. The exact dosage depends on the calcium carbonate loading level, the PET grade being used, and the target mechanical and surface finish specifications. Higher filler ratios generally require dosage toward the upper end of the range.
Yes. The formulation is specifically engineered for high-filler PET systems, with compatibility verified at CaCO₃-to-PET ratios up to 1:4. At these filler levels, the compatibilization and lubrication components in the one-pack become especially important for maintaining processing stability and substrate integrity.
Yes, in properly configured systems. The one-pack supports direct one-step powder processing, which means the combined PET resin, calcium carbonate filler, and one-pack additive can be fed directly into an extruder or calendering line without prior pelletizing. This reduces energy consumption and cycle time, which is a meaningful cost advantage at scale.
This depends on the specific recycled PET source and its contamination profile, residual moisture level, and molecular weight distribution. Joysun's technical team can evaluate compatibility on a case-by-case basis and recommend dosage adjustments or supplementary chemistry if needed. As a general principle, recycled PET with a higher degree of degradation may require additional chain extension support within the one-pack.
The one-pack is designed for compatibility with standard twin-screw extrusion and calendering equipment used in PET flooring production. Processing temperature ranges, screw configurations, and die geometry should be discussed with Joysun's technical team during the sample evaluation phase.
PET flooring substrates use a fundamentally different polymer matrix from PVC-based SPC or wood-plastic WPC floors. PET requires chain extension chemistry and high-temperature stabilization that are not relevant in PVC systems. The lubrication system must also be designed for a higher processing temperature window. If your line produces both PET and PVC-based floors, you will typically need separate one-pack systems for each substrate type. Joysun's SPC/WPC floor one-pack additive is the corresponding product for PVC-matrix floors.
Zhejiang Joysun Advanced Material Co., Ltd. holds ISO 9001 quality management certification, has been designated a National High-Tech Enterprise and a Zhejiang Province Specialized, Refined, Unique, and Innovative SME, and operates a provincial-level postdoctoral research station. The company has been granted multiple national invention patents and participates in industry standard development. Full certification details are available on the about us page.
Zhejiang Joysun Advanced Material Co., Ltd. supplies PET floor one-pack additives to flooring manufacturers and compounders globally. The company operates from a 32,000 m² production facility in the Dushangang Chemical Industrial Park, Pinghu, Zhejiang, with an annual production capacity of 70,000 tons across all product lines.
For technical data sheets, sample requests, or application-specific formulation advice, reach the sales and technical team directly:
Email: sale@joysunsh.com
Phone: 0086-21-39197569
To review the full PET flooring additive product specifications, including the PET020L grade datasheet, visit the product detail page. For the complete range of flooring and polymer additive solutions — including chemical foaming agents, PVC Ca-Zn stabilizers, PVC flame retardants, and high-performance TPEE — visit the full product catalog.