Degradable Plastics Deodorizer

Product Introduction

Fully biodegradable plastics (PLA, PBAT, starch-based materials) are highly sensitive to heat and moisture due to their aliphatic polyester structure. During high-temperature processing, they easily undergo hydrolytic chain scission, releasing low-molecular organic acids (lactic, succinic) that produce a strong "rancid" odor. Additionally, starch-based fillers easily ferment under warm, moist conditions due to microbial activity, releasing "spoilage" odors like ammonia and hydrogen sulfide.

This specialized deodorizer utilizes a "dual-action inhibition and molecular targeted curing" technology. Built-in weak base media and esterification groups gently neutralize and convert free acids, eliminating sour odors at the source. Special metal chelating units provide long-lasting inhibition of abnormal microbial growth, cutting off fermentation odors. Crucially, the formula introduces macromolecular chain extension and coupling technology. It chemically stitches the captured low-molecular odorants back into the polymer main chain, repairing broken chains while thermodynamically blocking the physical channel for small molecules to migrate to the surface (blooming). Completely compatible with degradable substrates, it maintains the original degradation cycle and transparency, serving as the premier odor purification solution for high-end eco-films and food-contact packaging.

Appearance

White or off-white powder

Deodorizing Principle

• Catalytic Esterification & Mild Neutralization: Embedded solid weak bases and highly active esterification groups precisely identify free acids from polyester chain scission. At processing temperatures, they gently neutralize or ring-open esterify volatile small-molecule acids, converting them into stable, non-volatile salts or macromolecular esters.
• Microbial Inhibition & Targeted Complexation: To combat fermentation in starch-containing systems, specific metal bacteriostatic media provide long-lasting inhibition of premature microbial growth, stopping the production of foul metabolites (ammonia, H2S). Concurrently, empty orbital effects instantly target and lock any generated free odor gases.
• Chain Extension & Network Curing (Anti-Blooming): Embedded multi-functional reactive media not only eliminate odors but also recouple and graft free low-molecular acid salts and short chains back onto the polymer backbone, achieving "macromolecularization." This repairs hydrolytically broken polyester chains and completely seals the path for polar small molecules to migrate and bloom on the surface.

Application Areas

• Eco-Friendly Film Materials: Deodorizing and anti-mold treatments for PBAT/PLA biodegradable agricultural mulch films containing starch fillers, supermarket shopping bags, takeout bags, and courier bags.
• Food-Contact Tableware: Odor removal for pure PLA or starch-based injection-molded/foamed lunch boxes, biodegradable straws, cold drink cups, and cutlery. The formula fully meets compliance requirements for direct food contact.
• High-End Degradable Injection Parts: Lasting odor purification and anti-whitening for medical eco-packaging and high-requirement eco-friendly degradable components.

Usage Method

• Adding Method: A pure dry powder additive. During the compounding stage of extrusion, blown film, or injection molding, thoroughly dry-blend the deodorizer with the PLA/PBAT base resins and biological fillers.
• Mixing Requirements: Degradable materials are extremely sensitive to moisture. Ensure base resins are fully dehumidified and dried according to standard processes before mixing. Use low/medium speed mixing at room temperature (e.g., V-type or tumble mixers). Avoid high-speed friction mixing to prevent overheating and clumping.

Reference Dosage

• Standard Pure Degradable Resins: Add at 0.5% - 1.0% of the total material weight.
• High Starch Filler (>30%) or Regrind Systems: Recommended dosage increases to 0.8% - 1.5%.
• Starting Test Dosage: It is recommended to start testing at 0.5%, and then finely adjust based on final product odor, toughness, and surface dryness (checking for blooming).

Precautions

• Strict Moisture Protection: The deeply dehydrated skeleton is extremely sensitive to ambient humidity. If the deodorizer absorbs moisture, its vaporization during high-temp processing will cause catastrophic hydrolytic scission of the polyester. Use promptly after opening and vacuum-seal any remainder immediately.
• Substrate Drying Requirement: This product captures normal processing free acids. If the client fails to thoroughly dry the base resin, the massive amount of moisture-induced acid odor will instantly overwhelm the chemical capturing capacity of the formula.