Recycled Plastics Deodorizer

Product Introduction

With the rapid evolution of the circular economy, the high-value utilization of bulk post-consumer recycled (PCR) plastics (such as recycled PP, PE, PVC) has become a core focus. However, recycled materials often carry exogenous pollutants like detergent residues, pesticides, and biological decomposition. After multiple extreme melt thermo-oxidative degradations, they accumulate a large amount of low-molecular volatiles. During pelletizing and secondary processing, they release a complex stench mixed with rancid, ammonia, and solvent odors, hindering PCR plastics from entering high-end markets.

This product features an original dual-core architecture of "anhydrous hydrophobic isolation and homologous macromolecular anchoring." Relying on high-efficiency acid absorption sites and active macromolecular metal complexes, it accurately locks and chemically chelates free amines and sulfides. Physically, a nanoscale hydrophobic isolation network and macromolecular interfacial bridging technology present ultimate dispersion during dry blending (zero white spots). Through homologous co-crystallization in the resin melt, deodorizing reactants are firmly anchored inside the 3D network, completely blocking migration paths (absolute zero blooming) while perfectly guarding the mechanical properties of the recycled plastic.

Appearance

White powder

Deodorizing Principle

• Empty Orbital Targeted Complexation: The core consists of macromolecular organic complexes rich in electron-deficient metal atom centers. Activated at high temperatures, they powerfully capture the lone pair electrons of nitrogen-containing (amines) and sulfur-containing (thiols, thioethers) odors via empty orbitals, converting them into stable, non-volatile polymer networks through irreversible coordination bonds.
• Lewis Acid-Base Catalysis & Acid Neutralization: Transition metal catalytic sites act as excellent inorganic acid absorbers during extrusion. They instantly neutralize short-chain free acids (the source of rancidity) to cut off acid-catalyzed degradation, while catalytically cracking stubborn aldehyde and ketone solvent odors.
• Nano-Hydrophobic Isolation: Utilizing a nanoscale isolation network with dense hydrophobic groups, polar reactants are encapsulated layer by layer. This eliminates environmental moisture interference (preventing bubbles) and physically extracts and traps macromolecular oils and VOCs.
• Homologous Macromolecular Anchoring: Long-chain polymer compatibilizers with highly polar reactive end groups are introduced. During processing, the polar ends lock onto deodorized products, while the non-polar backbone undergoes molecular entanglement and co-crystallization with the recycled polyolefin matrix. This "in-situ physical anchoring" totally blocks the migration of polar substances to the surface, achieving long-lasting zero blooming.

Application Areas

• Recycled Films & Pipes: Ideal for eco-friendly garbage bag blown films, recycled PE shopping bags, and recycled water supply/drainage pipe extrusion. Eliminates pungent rancid and pesticide odors, ensuring bubble-free films and boosting market value.
• High-Quality Recycled Injection Molding: Dark non-appearance automotive parts (bumpers, fenders), high-gloss appliance bases, battery casings, and high-frequency turnover boxes (recycled PP/ABS). Ensures zero white spots and does not affect subsequent paint or print adhesion.
• Modified Pellets & Composites: Various Wood-Plastic Composites (WPC) and bulk general plastic modified PCR pellets. Drastically reduces overall VOC and FOG emissions, aiding entry into strict high-end supply chains.

Usage Method

• Addition Method: A ready-to-use physical dry powder additive. Add it together with other plastic pellets or color masterbatches into the mixing equipment during the pre-blending stage of pelletizing, film blowing, or injection molding.
• Mixing Requirements: Built-in with an excellent anti-caking and self-lubricating nano-network, it does not rely on high shear from high-speed mixers. A standard V-blender, 3D mixer, or drum mixer rotating at low speed at room temperature for 10-15 minutes will allow the powder to uniformly adhere to the resin pellets.

Reference Dosage

• Standard Recycled Plastics (Mild to Moderate Odor): 0.4% - 0.6% of total weight.
• Low-Grade Plastics (Heavy Odor/Spoilage): 0.7% - 1.0% of total weight.
• Starting Test Dosage: It is recommended to start trials at 0.5% and fine-tune based on residual odor levels and surface finish.

Precautions

• Moisture-Proof Storage: Although nano-hydrophobic, the high specific surface area requires tight sealing (or vacuuming) after opening to prevent long-term exposure to high humidity.
• Processing Temperature: Recommended extrusion or injection temperature is 160°C - 240°C to perfectly activate the melt-anchoring effect of the macromolecular compatibilizer.