Plastic Recycling TRIZ Cases

Blending EVA copolymers with different vinyl acetate contents helps toughen brittle and recycled resins while preserving flexibility and recyclability.

Two-part resin, aminoplast, and acid-catalyst formulations stay on polyolefin labels during hot caustic washing, reducing PET flake staining.

Mixing recovered polyester resin with aluminum and phosphorus compounds reduces film coloring and molecular-weight loss during reprocessing.

Energy-intensive recycling can generate harmful byproducts; an Fe@C3N4 photocatalyst converts plastic waste to acetic acid under ambient conditions.

Heat-activated triggerable polymers release acid or blowing agents to depolymerize matrix polymers into recyclable monomers.

Separating fiber-containing interiors before air sorting reduces entanglement and improves olefin resin recovery from salvage vehicle shredder dust.

Grinding, melt-index sorting, pelletizing, and devolatilization convert post-consumer HDPE and PP into food-contact molding feedstock without additives.

Virgin ethylene alkyl (meth)acrylate improves impact strength and tensile strain at break in recycled PP/PE blends.

Chopped polystyrene passes through solvent rinsing, freezing, and grinding stages to remove trapped air and reduce waste volume.

Removing PVC and PET before shear mixing helps produce a homogeneous waste-derived composite with injection-molding strength.

See how recycled and bisphenol C polycarbonate balance flame retardancy with surface hardness or transparency in formed articles.

See how recycled polycarbonate, controlled molecular weight, and fluoropolymer-free flame retardants preserve transparency while improving formed-article flame retardancy.

Peroxide at pH 6.5–8.5 rapidly solubilizes recovered water-absorbent resin while limiting coloring and supporting stable polymerization.

A mixed solvent dissolves composite resin and recrystallizes recycled polymer, reducing solvent-evaporation energy and separation complexity.

A branched polyester blend improves recycled PET miscibility and extrusion blow-molding processability for quality molded articles.

An organic-base and alkaline-salt catalyst breaks down PET below 100 °C, lowering energy demand while producing selective terephthalate derivatives.

Alcoholysis followed by hydrolysis converts end-of-life PUR foam into reusable polyol and diamine fractions with limited purification.

Supercritical CO2 and water break PETE ester linkages for low-energy recycling while enabling CO2 recovery and cleaner monomer products.

Natural rubber, dual-VA EVA copolymers, and mineral fillers help restore recycled-plastic strength while supporting recyclability and lower processing temperatures.

Oxidants combined with cosolvents decolorize waste fabric and separate polyester from spandex while reducing cosolvent use.

Metal-mesh filters clean molten polymers in counterflow to remove impurities, preserve useful material, and maintain outlet pressure.